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.mcp-venv/lib/python3.13/site-packages/cryptography-50.0.0.dist-info/INSTALLER

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+pip

.mcp-venv/lib/python3.13/site-packages/cryptography-50.0.0.dist-info/METADATA

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+Metadata-Version: 2.4
+Name: cryptography
+Version: 50.0.0
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: Natural Language :: English
+Classifier: Operating System :: MacOS :: MacOS X
+Classifier: Operating System :: POSIX
+Classifier: Operating System :: POSIX :: BSD
+Classifier: Operating System :: POSIX :: Linux
+Classifier: Operating System :: Microsoft :: Windows
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3 :: Only
+Classifier: Programming Language :: Python :: 3.9
+Classifier: Programming Language :: Python :: 3.10
+Classifier: Programming Language :: Python :: 3.11
+Classifier: Programming Language :: Python :: 3.12
+Classifier: Programming Language :: Python :: 3.13
+Classifier: Programming Language :: Python :: 3.14
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Programming Language :: Python :: Free Threading :: 3 - Stable
+Classifier: Topic :: Security :: Cryptography
+Requires-Dist: cffi>=2.0.0 ; platform_python_implementation != 'PyPy'
+Requires-Dist: typing-extensions>=4.13.2 ; python_full_version < '3.11'
+Requires-Dist: bcrypt>=3.1.5 ; extra == 'ssh'
+Provides-Extra: ssh
+License-File: LICENSE
+License-File: LICENSE.APACHE
+License-File: LICENSE.BSD
+Summary: cryptography is a package which provides cryptographic recipes and primitives to Python developers.
+Author-email: The Python Cryptographic Authority and individual contributors <cryptography-dev@python.org>
+License-Expression: Apache-2.0 OR BSD-3-Clause
+Requires-Python: >=3.9, !=3.9.0, !=3.9.1
+Description-Content-Type: text/x-rst; charset=UTF-8
+Project-URL: changelog, https://cryptography.io/en/latest/changelog/
+Project-URL: documentation, https://cryptography.io/
+Project-URL: homepage, https://github.com/pyca/cryptography
+Project-URL: issues, https://github.com/pyca/cryptography/issues
+Project-URL: source, https://github.com/pyca/cryptography/
+
+pyca/cryptography
+=================
+
+.. image:: https://img.shields.io/pypi/v/cryptography.svg
+    :target: https://pypi.org/project/cryptography/
+    :alt: Latest Version
+
+.. image:: https://readthedocs.org/projects/cryptography/badge/?version=latest
+    :target: https://cryptography.io
+    :alt: Latest Docs
+
+.. image:: https://github.com/pyca/cryptography/actions/workflows/ci.yml/badge.svg
+    :target: https://github.com/pyca/cryptography/actions/workflows/ci.yml?query=branch%3Amain
+
+``cryptography`` is a package which provides cryptographic recipes and
+primitives to Python developers. Our goal is for it to be your "cryptographic
+standard library". It supports Python 3.9+ and PyPy3 7.3.11+.
+
+``cryptography`` includes both high level recipes and low level interfaces to
+common cryptographic algorithms such as symmetric ciphers, message digests, and
+key derivation functions. For example, to encrypt something with
+``cryptography``'s high level symmetric encryption recipe:
+
+.. code-block:: pycon
+
+    >>> from cryptography.fernet import Fernet
+    >>> # Put this somewhere safe!
+    >>> key = Fernet.generate_key()
+    >>> f = Fernet(key)
+    >>> token = f.encrypt(b"A really secret message. Not for prying eyes.")
+    >>> token
+    b'...'
+    >>> f.decrypt(token)
+    b'A really secret message. Not for prying eyes.'
+
+You can find more information in the `documentation`_.
+
+You can install ``cryptography`` with:
+
+.. code-block:: console
+
+    $ pip install cryptography
+
+For full details see `the installation documentation`_.
+
+Discussion
+~~~~~~~~~~
+
+If you run into bugs, you can file them in our `issue tracker`_.
+
+We maintain a `cryptography-dev`_ mailing list for development discussion.
+
+You can also join ``#pyca`` on ``irc.libera.chat`` to ask questions or get
+involved.
+
+Security
+~~~~~~~~
+
+Need to report a security issue? Please consult our `security reporting`_
+documentation.
+
+
+.. _`documentation`: https://cryptography.io/
+.. _`the installation documentation`: https://cryptography.io/en/latest/installation/
+.. _`issue tracker`: https://github.com/pyca/cryptography/issues
+.. _`cryptography-dev`: https://mail.python.org/mailman/listinfo/cryptography-dev
+.. _`security reporting`: https://cryptography.io/en/latest/security/
+

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.mcp-venv/lib/python3.13/site-packages/cryptography-50.0.0.dist-info/licenses/LICENSE

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+This software is made available under the terms of *either* of the licenses
+found in LICENSE.APACHE or LICENSE.BSD. Contributions to cryptography are made
+under the terms of *both* these licenses.

.mcp-venv/lib/python3.13/site-packages/cryptography-50.0.0.dist-info/licenses/LICENSE.APACHE

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.mcp-venv/lib/python3.13/site-packages/cryptography-50.0.0.dist-info/licenses/LICENSE.BSD

@@ -0,0 +1,27 @@
+Copyright (c) Individual contributors.
+All rights reserved.
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+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
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+        "registry+https://github.com/rust-lang/crates.io-index#base64@0.23.0"
+      ]
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#pkg-config@0.3.33"
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#portable-atomic@1.14.0"
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#proc-macro2@1.0.107",
+      "dependsOn": [
+        "registry+https://github.com/rust-lang/crates.io-index#unicode-ident@1.0.24"
+      ]
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#pyo3-build-config@0.29.0",
+      "dependsOn": [
+        "registry+https://github.com/rust-lang/crates.io-index#target-lexicon@0.13.5"
+      ]
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#pyo3-ffi@0.29.0",
+      "dependsOn": [
+        "registry+https://github.com/rust-lang/crates.io-index#libc@0.2.189",
+        "registry+https://github.com/rust-lang/crates.io-index#pyo3-build-config@0.29.0"
+      ]
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#pyo3-macros-backend@0.29.0",
+      "dependsOn": [
+        "registry+https://github.com/rust-lang/crates.io-index#heck@0.5.0",
+        "registry+https://github.com/rust-lang/crates.io-index#proc-macro2@1.0.107",
+        "registry+https://github.com/rust-lang/crates.io-index#quote@1.0.47",
+        "registry+https://github.com/rust-lang/crates.io-index#syn@2.0.119"
+      ]
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#pyo3-macros@0.29.0",
+      "dependsOn": [
+        "registry+https://github.com/rust-lang/crates.io-index#proc-macro2@1.0.107",
+        "registry+https://github.com/rust-lang/crates.io-index#pyo3-macros-backend@0.29.0",
+        "registry+https://github.com/rust-lang/crates.io-index#quote@1.0.47",
+        "registry+https://github.com/rust-lang/crates.io-index#syn@2.0.119"
+      ]
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#pyo3@0.29.0",
+      "dependsOn": [
+        "registry+https://github.com/rust-lang/crates.io-index#libc@0.2.189",
+        "registry+https://github.com/rust-lang/crates.io-index#once_cell@1.21.4",
+        "registry+https://github.com/rust-lang/crates.io-index#portable-atomic@1.14.0",
+        "registry+https://github.com/rust-lang/crates.io-index#pyo3-build-config@0.29.0",
+        "registry+https://github.com/rust-lang/crates.io-index#pyo3-ffi@0.29.0",
+        "registry+https://github.com/rust-lang/crates.io-index#pyo3-macros@0.29.0"
+      ]
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#quote@1.0.47",
+      "dependsOn": [
+        "registry+https://github.com/rust-lang/crates.io-index#proc-macro2@1.0.107"
+      ]
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#self_cell@1.3.0"
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#shlex@2.0.1"
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#syn@2.0.119",
+      "dependsOn": [
+        "registry+https://github.com/rust-lang/crates.io-index#proc-macro2@1.0.107",
+        "registry+https://github.com/rust-lang/crates.io-index#quote@1.0.47",
+        "registry+https://github.com/rust-lang/crates.io-index#unicode-ident@1.0.24"
+      ]
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#target-lexicon@0.13.5"
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#unicode-ident@1.0.24"
+    },
+    {
+      "ref": "registry+https://github.com/rust-lang/crates.io-index#vcpkg@0.2.15"
+    }
+  ]
+}

.mcp-venv/lib/python3.13/site-packages/cryptography-50.0.0.dist-info/sboms/sbom.json

@@ -0,0 +1,43 @@
+{
+  "bomFormat": "CycloneDX",
+  "specVersion": "1.5",
+  "version": 1,
+  "serialNumber": "urn:uuid:6120948b-27bc-4bc5-b880-1557c2ab4bd1",
+  "metadata": {
+    "timestamp": "2026-07-31T11:10:12Z"
+  },
+  "components": [
+    {
+      "type": "library",
+      "name": "openssl",
+      "version": "4.0.1",
+      "purl": "pkg:generic/openssl@4.0.1?download_url=https://github.com/openssl/openssl/releases/download/openssl-4.0.1/openssl-4.0.1.tar.gz",
+      "hashes": [
+        {
+          "alg": "SHA-256",
+          "content": "2db3f3a0d6ea4b59e1f094ace2c8cd536dffb87cdc39084c5afa1e6f7f37dd09"
+        }
+      ],
+      "externalReferences": [
+        {
+          "type": "distribution",
+          "url": "https://github.com/openssl/openssl/releases/download/openssl-4.0.1/openssl-4.0.1.tar.gz"
+        }
+      ],
+      "properties": [
+        {
+          "name": "build:operating-system",
+          "value": "linux"
+        },
+        {
+          "name": "build:architecture",
+          "value": "x86_64"
+        },
+        {
+          "name": "build:flags",
+          "value": "no-zlib no-shared no-module no-comp no-apps no-docs no-sm2-precomp no-atexit enable-ec_nistp_64_gcc_128"
+        }
+      ]
+    }
+  ]
+}

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/hashes.py

@@ -0,0 +1,357 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import abc
+import sys
+
+from cryptography.hazmat.bindings._rust import openssl as rust_openssl
+from cryptography.utils import Buffer
+
+__all__ = [
+    "MD5",
+    "SHA1",
+    "SHA3_224",
+    "SHA3_256",
+    "SHA3_384",
+    "SHA3_512",
+    "SHA224",
+    "SHA256",
+    "SHA384",
+    "SHA512",
+    "SHA512_224",
+    "SHA512_256",
+    "SHAKE128",
+    "SHAKE256",
+    "SM3",
+    "BLAKE2b",
+    "BLAKE2s",
+    "ExtendableOutputFunction",
+    "Hash",
+    "HashAlgorithm",
+    "HashContext",
+    "XOFHash",
+]
+
+
+class HashAlgorithm(metaclass=abc.ABCMeta):
+    @property
+    @abc.abstractmethod
+    def name(self) -> str:
+        """
+        A string naming this algorithm (e.g. "sha256", "md5").
+        """
+
+    @property
+    @abc.abstractmethod
+    def digest_size(self) -> int:
+        """
+        The size of the resulting digest in bytes.
+        """
+
+    @property
+    @abc.abstractmethod
+    def block_size(self) -> int | None:
+        """
+        The internal block size of the hash function, or None if the hash
+        function does not use blocks internally (e.g. SHA3).
+        """
+
+
+class HashContext(metaclass=abc.ABCMeta):
+    @property
+    @abc.abstractmethod
+    def algorithm(self) -> HashAlgorithm:
+        """
+        A HashAlgorithm that will be used by this context.
+        """
+
+    @abc.abstractmethod
+    def update(self, data: Buffer) -> None:
+        """
+        Processes the provided bytes through the hash.
+        """
+
+    @abc.abstractmethod
+    def finalize(self) -> bytes:
+        """
+        Finalizes the hash context and returns the hash digest as bytes.
+        """
+
+    @abc.abstractmethod
+    def copy(self) -> HashContext:
+        """
+        Return a HashContext that is a copy of the current context.
+        """
+
+
+Hash = rust_openssl.hashes.Hash
+HashContext.register(Hash)
+
+XOFHash = rust_openssl.hashes.XOFHash
+
+
+class ExtendableOutputFunction(metaclass=abc.ABCMeta):
+    """
+    An interface for extendable output functions.
+    """
+
+
+class SHA1(HashAlgorithm):
+    name = "sha1"
+    digest_size = 20
+    block_size = 64
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SHA1):
+            return NotImplemented
+
+        return True
+
+
+class SHA512_224(HashAlgorithm):  # noqa: N801
+    name = "sha512-224"
+    digest_size = 28
+    block_size = 128
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SHA512_224):
+            return NotImplemented
+
+        return True
+
+
+class SHA512_256(HashAlgorithm):  # noqa: N801
+    name = "sha512-256"
+    digest_size = 32
+    block_size = 128
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SHA512_256):
+            return NotImplemented
+
+        return True
+
+
+class SHA224(HashAlgorithm):
+    name = "sha224"
+    digest_size = 28
+    block_size = 64
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SHA224):
+            return NotImplemented
+
+        return True
+
+
+class SHA256(HashAlgorithm):
+    name = "sha256"
+    digest_size = 32
+    block_size = 64
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SHA256):
+            return NotImplemented
+
+        return True
+
+
+class SHA384(HashAlgorithm):
+    name = "sha384"
+    digest_size = 48
+    block_size = 128
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SHA384):
+            return NotImplemented
+
+        return True
+
+
+class SHA512(HashAlgorithm):
+    name = "sha512"
+    digest_size = 64
+    block_size = 128
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SHA512):
+            return NotImplemented
+
+        return True
+
+
+class SHA3_224(HashAlgorithm):  # noqa: N801
+    name = "sha3-224"
+    digest_size = 28
+    block_size = None
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SHA3_224):
+            return NotImplemented
+
+        return True
+
+
+class SHA3_256(HashAlgorithm):  # noqa: N801
+    name = "sha3-256"
+    digest_size = 32
+    block_size = None
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SHA3_256):
+            return NotImplemented
+
+        return True
+
+
+class SHA3_384(HashAlgorithm):  # noqa: N801
+    name = "sha3-384"
+    digest_size = 48
+    block_size = None
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SHA3_384):
+            return NotImplemented
+
+        return True
+
+
+class SHA3_512(HashAlgorithm):  # noqa: N801
+    name = "sha3-512"
+    digest_size = 64
+    block_size = None
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SHA3_512):
+            return NotImplemented
+
+        return True
+
+
+class SHAKE128(HashAlgorithm, ExtendableOutputFunction):
+    name = "shake128"
+    block_size = None
+
+    def __init__(self, digest_size: int):
+        if not isinstance(digest_size, int):
+            raise TypeError("digest_size must be an integer")
+
+        if digest_size < 1:
+            raise ValueError("digest_size must be a positive integer")
+
+        self._digest_size = digest_size
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SHAKE128):
+            return NotImplemented
+
+        return self._digest_size == other._digest_size
+
+    @property
+    def digest_size(self) -> int:
+        return self._digest_size
+
+    @classmethod
+    def xof(cls):
+        return cls(sys.maxsize)
+
+
+class SHAKE256(HashAlgorithm, ExtendableOutputFunction):
+    name = "shake256"
+    block_size = None
+
+    def __init__(self, digest_size: int):
+        if not isinstance(digest_size, int):
+            raise TypeError("digest_size must be an integer")
+
+        if digest_size < 1:
+            raise ValueError("digest_size must be a positive integer")
+
+        self._digest_size = digest_size
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SHAKE256):
+            return NotImplemented
+
+        return self._digest_size == other._digest_size
+
+    @property
+    def digest_size(self) -> int:
+        return self._digest_size
+
+    @classmethod
+    def xof(cls):
+        return cls(sys.maxsize)
+
+
+class MD5(HashAlgorithm):
+    name = "md5"
+    digest_size = 16
+    block_size = 64
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, MD5):
+            return NotImplemented
+
+        return True
+
+
+class BLAKE2b(HashAlgorithm):
+    name = "blake2b"
+    _max_digest_size = 64
+    _min_digest_size = 1
+    block_size = 128
+
+    def __init__(self, digest_size: int):
+        if digest_size != 64:
+            raise ValueError("Digest size must be 64")
+
+        self._digest_size = digest_size
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, BLAKE2b):
+            return NotImplemented
+
+        return self._digest_size == other._digest_size
+
+    @property
+    def digest_size(self) -> int:
+        return self._digest_size
+
+
+class BLAKE2s(HashAlgorithm):
+    name = "blake2s"
+    block_size = 64
+    _max_digest_size = 32
+    _min_digest_size = 1
+
+    def __init__(self, digest_size: int):
+        if digest_size != 32:
+            raise ValueError("Digest size must be 32")
+
+        self._digest_size = digest_size
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, BLAKE2s):
+            return NotImplemented
+
+        return self._digest_size == other._digest_size
+
+    @property
+    def digest_size(self) -> int:
+        return self._digest_size
+
+
+class SM3(HashAlgorithm):
+    name = "sm3"
+    digest_size = 32
+    block_size = 64
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SM3):
+            return NotImplemented
+
+        return True

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/hmac.py

@@ -0,0 +1,13 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography.hazmat.bindings._rust import openssl as rust_openssl
+from cryptography.hazmat.primitives import hashes
+
+__all__ = ["HMAC"]
+
+HMAC = rust_openssl.hmac.HMAC
+hashes.HashContext.register(HMAC)

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/hpke.py

@@ -0,0 +1,27 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography.hazmat.bindings._rust import openssl as rust_openssl
+
+AEAD = rust_openssl.hpke.AEAD
+KDF = rust_openssl.hpke.KDF
+KEM = rust_openssl.hpke.KEM
+MLKEM768X25519PrivateKey = rust_openssl.hpke.MLKEM768X25519PrivateKey
+MLKEM768X25519PublicKey = rust_openssl.hpke.MLKEM768X25519PublicKey
+MLKEM1024P384PrivateKey = rust_openssl.hpke.MLKEM1024P384PrivateKey
+MLKEM1024P384PublicKey = rust_openssl.hpke.MLKEM1024P384PublicKey
+Suite = rust_openssl.hpke.Suite
+
+__all__ = [
+    "AEAD",
+    "KDF",
+    "KEM",
+    "MLKEM768X25519PrivateKey",
+    "MLKEM768X25519PublicKey",
+    "MLKEM1024P384PrivateKey",
+    "MLKEM1024P384PublicKey",
+    "Suite",
+]

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/kdf/__init__.py

@@ -0,0 +1,32 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import abc
+
+from cryptography.utils import Buffer
+
+
+class KeyDerivationFunction(metaclass=abc.ABCMeta):
+    @abc.abstractmethod
+    def derive(self, key_material: bytes) -> bytes:
+        """
+        Deterministically generates and returns a new key based on the existing
+        key material.
+        """
+
+    @abc.abstractmethod
+    def derive_into(self, key_material: bytes, buffer: Buffer) -> None:
+        """
+        Deterministically generates a new key based on the existing key
+        material and stores it in the provided buffer.
+        """
+
+    @abc.abstractmethod
+    def verify(self, key_material: bytes, expected_key: bytes) -> None:
+        """
+        Checks whether the key generated by the key material matches the
+        expected derived key. Raises an exception if they do not match.
+        """

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/kdf/argon2.py

@@ -0,0 +1,17 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography.hazmat.bindings._rust import openssl as rust_openssl
+from cryptography.hazmat.primitives.kdf import KeyDerivationFunction
+
+Argon2d = rust_openssl.kdf.Argon2d
+Argon2i = rust_openssl.kdf.Argon2i
+Argon2id = rust_openssl.kdf.Argon2id
+KeyDerivationFunction.register(Argon2d)
+KeyDerivationFunction.register(Argon2i)
+KeyDerivationFunction.register(Argon2id)
+
+__all__ = ["Argon2d", "Argon2i", "Argon2id"]

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/kdf/concatkdf.py

@@ -0,0 +1,16 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography.hazmat.bindings._rust import openssl as rust_openssl
+from cryptography.hazmat.primitives.kdf import KeyDerivationFunction
+
+ConcatKDFHash = rust_openssl.kdf.ConcatKDFHash
+ConcatKDFHMAC = rust_openssl.kdf.ConcatKDFHMAC
+
+KeyDerivationFunction.register(ConcatKDFHash)
+KeyDerivationFunction.register(ConcatKDFHMAC)
+
+__all__ = ["ConcatKDFHMAC", "ConcatKDFHash"]

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/kdf/hkdf.py

@@ -0,0 +1,16 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography.hazmat.bindings._rust import openssl as rust_openssl
+from cryptography.hazmat.primitives.kdf import KeyDerivationFunction
+
+HKDF = rust_openssl.kdf.HKDF
+HKDFExpand = rust_openssl.kdf.HKDFExpand
+
+KeyDerivationFunction.register(HKDF)
+KeyDerivationFunction.register(HKDFExpand)
+
+__all__ = ["HKDF", "HKDFExpand"]

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/kdf/kbkdf.py

@@ -0,0 +1,26 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography import utils
+from cryptography.hazmat.bindings._rust import openssl as rust_openssl
+from cryptography.hazmat.primitives.kdf import KeyDerivationFunction
+
+
+class Mode(utils.Enum):
+    CounterMode = "ctr"
+
+
+class CounterLocation(utils.Enum):
+    BeforeFixed = "before_fixed"
+    AfterFixed = "after_fixed"
+    MiddleFixed = "middle_fixed"
+
+
+KBKDFHMAC = rust_openssl.kdf.KBKDFHMAC
+KeyDerivationFunction.register(KBKDFHMAC)
+
+KBKDFCMAC = rust_openssl.kdf.KBKDFCMAC
+KeyDerivationFunction.register(KBKDFCMAC)

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/kdf/pbkdf2.py

@@ -0,0 +1,13 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography.hazmat.bindings._rust import openssl as rust_openssl
+from cryptography.hazmat.primitives.kdf import KeyDerivationFunction
+
+PBKDF2HMAC = rust_openssl.kdf.PBKDF2HMAC
+KeyDerivationFunction.register(PBKDF2HMAC)
+
+__all__ = ["PBKDF2HMAC"]

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/kdf/scrypt.py

@@ -0,0 +1,19 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import sys
+
+from cryptography.hazmat.bindings._rust import openssl as rust_openssl
+from cryptography.hazmat.primitives.kdf import KeyDerivationFunction
+
+# This is used by the scrypt tests to skip tests that require more memory
+# than the MEM_LIMIT
+_MEM_LIMIT = sys.maxsize // 2
+
+Scrypt = rust_openssl.kdf.Scrypt
+KeyDerivationFunction.register(Scrypt)
+
+__all__ = ["Scrypt"]

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/kdf/x963kdf.py

@@ -0,0 +1,13 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography.hazmat.bindings._rust import openssl as rust_openssl
+from cryptography.hazmat.primitives.kdf import KeyDerivationFunction
+
+X963KDF = rust_openssl.kdf.X963KDF
+KeyDerivationFunction.register(X963KDF)
+
+__all__ = ["X963KDF"]

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/keywrap.py

@@ -0,0 +1,25 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography.hazmat.bindings._rust import openssl as rust_openssl
+
+__all__ = [
+    "InvalidUnwrap",
+    "aes_key_unwrap",
+    "aes_key_unwrap_with_padding",
+    "aes_key_wrap",
+    "aes_key_wrap_with_padding",
+]
+
+
+class InvalidUnwrap(Exception):
+    pass
+
+
+aes_key_wrap = rust_openssl.keywrap.aes_key_wrap
+aes_key_unwrap = rust_openssl.keywrap.aes_key_unwrap
+aes_key_wrap_with_padding = rust_openssl.keywrap.aes_key_wrap_with_padding
+aes_key_unwrap_with_padding = rust_openssl.keywrap.aes_key_unwrap_with_padding

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/padding.py

@@ -0,0 +1,69 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import abc
+
+from cryptography import utils
+from cryptography.hazmat.bindings._rust import (
+    ANSIX923PaddingContext,
+    ANSIX923UnpaddingContext,
+    PKCS7PaddingContext,
+    PKCS7UnpaddingContext,
+)
+
+
+class PaddingContext(metaclass=abc.ABCMeta):
+    @abc.abstractmethod
+    def update(self, data: utils.Buffer) -> bytes:
+        """
+        Pads the provided bytes and returns any available data as bytes.
+        """
+
+    @abc.abstractmethod
+    def finalize(self) -> bytes:
+        """
+        Finalize the padding, returns bytes.
+        """
+
+
+def _byte_padding_check(block_size: int) -> None:
+    if not (0 <= block_size <= 2040):
+        raise ValueError("block_size must be in range(0, 2041).")
+
+    if block_size % 8 != 0:
+        raise ValueError("block_size must be a multiple of 8.")
+
+
+class PKCS7:
+    def __init__(self, block_size: int):
+        _byte_padding_check(block_size)
+        self.block_size = block_size
+
+    def padder(self) -> PaddingContext:
+        return PKCS7PaddingContext(self.block_size)
+
+    def unpadder(self) -> PaddingContext:
+        return PKCS7UnpaddingContext(self.block_size)
+
+
+PaddingContext.register(PKCS7PaddingContext)
+PaddingContext.register(PKCS7UnpaddingContext)
+
+
+class ANSIX923:
+    def __init__(self, block_size: int):
+        _byte_padding_check(block_size)
+        self.block_size = block_size
+
+    def padder(self) -> PaddingContext:
+        return ANSIX923PaddingContext(self.block_size)
+
+    def unpadder(self) -> PaddingContext:
+        return ANSIX923UnpaddingContext(self.block_size)
+
+
+PaddingContext.register(ANSIX923PaddingContext)
+PaddingContext.register(ANSIX923UnpaddingContext)

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/poly1305.py

@@ -0,0 +1,11 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography.hazmat.bindings._rust import openssl as rust_openssl
+
+__all__ = ["Poly1305"]
+
+Poly1305 = rust_openssl.poly1305.Poly1305

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/serialization/__init__.py

@@ -0,0 +1,85 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography import utils
+from cryptography.hazmat.primitives._serialization import (
+    BestAvailableEncryption,
+    Encoding,
+    KeySerializationEncryption,
+    NoEncryption,
+    ParameterFormat,
+    PrivateFormat,
+    PublicFormat,
+    _KeySerializationEncryption,
+)
+from cryptography.hazmat.primitives.asymmetric.dh import _FFDH_DEPRECATION_MSG
+from cryptography.hazmat.primitives.serialization.base import (
+    load_der_parameters,
+    load_der_private_key,
+    load_der_public_key,
+    load_pem_parameters,
+    load_pem_private_key,
+    load_pem_public_key,
+)
+from cryptography.hazmat.primitives.serialization.ssh import (
+    SSHCertificate,
+    SSHCertificateBuilder,
+    SSHCertificateType,
+    SSHCertPrivateKeyTypes,
+    SSHCertPublicKeyTypes,
+    SSHPrivateKeyTypes,
+    SSHPublicKeyTypes,
+    load_ssh_private_key,
+    load_ssh_public_identity,
+    load_ssh_public_key,
+    ssh_key_fingerprint,
+)
+
+__all__ = [
+    "BestAvailableEncryption",
+    "Encoding",
+    "KeySerializationEncryption",
+    "NoEncryption",
+    "ParameterFormat",
+    "PrivateFormat",
+    "PublicFormat",
+    "SSHCertPrivateKeyTypes",
+    "SSHCertPublicKeyTypes",
+    "SSHCertificate",
+    "SSHCertificateBuilder",
+    "SSHCertificateType",
+    "SSHPrivateKeyTypes",
+    "SSHPublicKeyTypes",
+    "_KeySerializationEncryption",
+    "load_der_parameters",
+    "load_der_private_key",
+    "load_der_public_key",
+    "load_pem_parameters",
+    "load_pem_private_key",
+    "load_pem_public_key",
+    "load_ssh_private_key",
+    "load_ssh_public_identity",
+    "load_ssh_public_key",
+    "ssh_key_fingerprint",
+]
+
+# These can only load FFDH parameters, so the functions themselves are
+# deprecated alongside the rest of FFDH.
+utils.deprecated(
+    load_pem_parameters,
+    __name__,
+    _FFDH_DEPRECATION_MSG,
+    utils.DeprecatedIn50,
+    name="load_pem_parameters",
+)
+
+utils.deprecated(
+    load_der_parameters,
+    __name__,
+    _FFDH_DEPRECATION_MSG,
+    utils.DeprecatedIn50,
+    name="load_der_parameters",
+)

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/serialization/base.py

@@ -0,0 +1,16 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography.hazmat.bindings._rust import openssl as rust_openssl
+
+load_pem_private_key = rust_openssl.keys.load_pem_private_key
+load_der_private_key = rust_openssl.keys.load_der_private_key
+
+load_pem_public_key = rust_openssl.keys.load_pem_public_key
+load_der_public_key = rust_openssl.keys.load_der_public_key
+
+load_pem_parameters = rust_openssl.dh.from_pem_parameters
+load_der_parameters = rust_openssl.dh.from_der_parameters

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/serialization/pkcs12.py

@@ -0,0 +1,176 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import typing
+from collections.abc import Iterable
+
+from cryptography import x509
+from cryptography.hazmat.bindings._rust import pkcs12 as rust_pkcs12
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.primitives._serialization import PBES as PBES
+from cryptography.hazmat.primitives.asymmetric import (
+    dsa,
+    ec,
+    ed448,
+    ed25519,
+    rsa,
+)
+from cryptography.hazmat.primitives.asymmetric.types import PrivateKeyTypes
+
+__all__ = [
+    "PBES",
+    "PKCS12Certificate",
+    "PKCS12KeyAndCertificates",
+    "PKCS12PrivateKeyTypes",
+    "load_key_and_certificates",
+    "load_pkcs12",
+    "serialize_java_truststore",
+    "serialize_key_and_certificates",
+]
+
+PKCS12PrivateKeyTypes = typing.Union[
+    rsa.RSAPrivateKey,
+    dsa.DSAPrivateKey,
+    ec.EllipticCurvePrivateKey,
+    ed25519.Ed25519PrivateKey,
+    ed448.Ed448PrivateKey,
+]
+
+
+PKCS12Certificate = rust_pkcs12.PKCS12Certificate
+
+
+class PKCS12KeyAndCertificates:
+    def __init__(
+        self,
+        key: PrivateKeyTypes | None,
+        cert: PKCS12Certificate | None,
+        additional_certs: list[PKCS12Certificate],
+    ):
+        if key is not None and not isinstance(
+            key,
+            (
+                rsa.RSAPrivateKey,
+                dsa.DSAPrivateKey,
+                ec.EllipticCurvePrivateKey,
+                ed25519.Ed25519PrivateKey,
+                ed448.Ed448PrivateKey,
+            ),
+        ):
+            raise TypeError(
+                "Key must be RSA, DSA, EllipticCurve, ED25519, or ED448"
+                " private key, or None."
+            )
+        if cert is not None and not isinstance(cert, PKCS12Certificate):
+            raise TypeError("cert must be a PKCS12Certificate object or None")
+        if not all(
+            isinstance(add_cert, PKCS12Certificate)
+            for add_cert in additional_certs
+        ):
+            raise TypeError(
+                "all values in additional_certs must be PKCS12Certificate"
+                " objects"
+            )
+        self._key = key
+        self._cert = cert
+        self._additional_certs = additional_certs
+
+    @property
+    def key(self) -> PrivateKeyTypes | None:
+        return self._key
+
+    @property
+    def cert(self) -> PKCS12Certificate | None:
+        return self._cert
+
+    @property
+    def additional_certs(self) -> list[PKCS12Certificate]:
+        return self._additional_certs
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, PKCS12KeyAndCertificates):
+            return NotImplemented
+
+        return (
+            self.key == other.key
+            and self.cert == other.cert
+            and self.additional_certs == other.additional_certs
+        )
+
+    def __hash__(self) -> int:
+        return hash((self.key, self.cert, tuple(self.additional_certs)))
+
+    def __repr__(self) -> str:
+        fmt = (
+            "<PKCS12KeyAndCertificates(key={}, cert={}, additional_certs={})>"
+        )
+        return fmt.format(self.key, self.cert, self.additional_certs)
+
+
+load_key_and_certificates = rust_pkcs12.load_key_and_certificates
+load_pkcs12 = rust_pkcs12.load_pkcs12
+
+
+_PKCS12CATypes = typing.Union[
+    x509.Certificate,
+    PKCS12Certificate,
+]
+
+
+def serialize_java_truststore(
+    certs: Iterable[PKCS12Certificate],
+    encryption_algorithm: serialization.KeySerializationEncryption,
+) -> bytes:
+    if not certs:
+        raise ValueError("You must supply at least one cert")
+
+    if not isinstance(
+        encryption_algorithm, serialization.KeySerializationEncryption
+    ):
+        raise TypeError(
+            "Key encryption algorithm must be a "
+            "KeySerializationEncryption instance"
+        )
+
+    return rust_pkcs12.serialize_java_truststore(certs, encryption_algorithm)
+
+
+def serialize_key_and_certificates(
+    name: bytes | None,
+    key: PKCS12PrivateKeyTypes | None,
+    cert: x509.Certificate | None,
+    cas: Iterable[_PKCS12CATypes] | None,
+    encryption_algorithm: serialization.KeySerializationEncryption,
+) -> bytes:
+    if key is not None and not isinstance(
+        key,
+        (
+            rsa.RSAPrivateKey,
+            dsa.DSAPrivateKey,
+            ec.EllipticCurvePrivateKey,
+            ed25519.Ed25519PrivateKey,
+            ed448.Ed448PrivateKey,
+        ),
+    ):
+        raise TypeError(
+            "Key must be RSA, DSA, EllipticCurve, ED25519, or ED448"
+            " private key, or None."
+        )
+
+    if not isinstance(
+        encryption_algorithm, serialization.KeySerializationEncryption
+    ):
+        raise TypeError(
+            "Key encryption algorithm must be a "
+            "KeySerializationEncryption instance"
+        )
+
+    if key is None and cert is None and not cas:
+        raise ValueError("You must supply at least one of key, cert, or cas")
+
+    return rust_pkcs12.serialize_key_and_certificates(
+        name, key, cert, cas, encryption_algorithm
+    )

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/serialization/pkcs7.py

@@ -0,0 +1,412 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import email.base64mime
+import email.generator
+import email.message
+import email.policy
+import io
+import typing
+from collections.abc import Iterable
+
+from cryptography import utils, x509
+from cryptography.exceptions import UnsupportedAlgorithm, _Reasons
+from cryptography.hazmat.bindings._rust import pkcs7 as rust_pkcs7
+from cryptography.hazmat.primitives import hashes, serialization
+from cryptography.hazmat.primitives.asymmetric import ec, padding, rsa
+from cryptography.hazmat.primitives.ciphers import (
+    algorithms,
+)
+from cryptography.utils import _check_byteslike
+
+load_pem_pkcs7_certificates = rust_pkcs7.load_pem_pkcs7_certificates
+
+load_der_pkcs7_certificates = rust_pkcs7.load_der_pkcs7_certificates
+
+serialize_certificates = rust_pkcs7.serialize_certificates
+
+PKCS7HashTypes = typing.Union[
+    hashes.SHA224,
+    hashes.SHA256,
+    hashes.SHA384,
+    hashes.SHA512,
+]
+
+PKCS7PrivateKeyTypes = typing.Union[
+    rsa.RSAPrivateKey, ec.EllipticCurvePrivateKey
+]
+
+ContentEncryptionAlgorithm = typing.Union[
+    type[algorithms.AES128], type[algorithms.AES256]
+]
+
+
+class PKCS7Options(utils.Enum):
+    Text = "Add text/plain MIME type"
+    Binary = "Don't translate input data into canonical MIME format"
+    DetachedSignature = "Don't embed data in the PKCS7 structure"
+    NoCapabilities = "Don't embed SMIME capabilities"
+    NoAttributes = "Don't embed authenticatedAttributes"
+    NoCerts = "Don't embed signer certificate"
+
+
+class PKCS7SignatureBuilder:
+    def __init__(
+        self,
+        data: utils.Buffer | None = None,
+        signers: list[
+            tuple[
+                x509.Certificate,
+                PKCS7PrivateKeyTypes,
+                PKCS7HashTypes,
+                padding.PSS | padding.PKCS1v15 | None,
+            ]
+        ] = [],
+        additional_certs: list[x509.Certificate] = [],
+    ):
+        self._data = data
+        self._signers = signers
+        self._additional_certs = additional_certs
+
+    def set_data(self, data: utils.Buffer) -> PKCS7SignatureBuilder:
+        _check_byteslike("data", data)
+        if self._data is not None:
+            raise ValueError("data may only be set once")
+
+        return PKCS7SignatureBuilder(data, self._signers)
+
+    def add_signer(
+        self,
+        certificate: x509.Certificate,
+        private_key: PKCS7PrivateKeyTypes,
+        hash_algorithm: PKCS7HashTypes,
+        *,
+        rsa_padding: padding.PSS | padding.PKCS1v15 | None = None,
+    ) -> PKCS7SignatureBuilder:
+        if not isinstance(
+            hash_algorithm,
+            (
+                hashes.SHA224,
+                hashes.SHA256,
+                hashes.SHA384,
+                hashes.SHA512,
+            ),
+        ):
+            raise TypeError(
+                "hash_algorithm must be one of hashes.SHA224, "
+                "SHA256, SHA384, or SHA512"
+            )
+        if not isinstance(certificate, x509.Certificate):
+            raise TypeError("certificate must be a x509.Certificate")
+
+        if not isinstance(
+            private_key, (rsa.RSAPrivateKey, ec.EllipticCurvePrivateKey)
+        ):
+            raise TypeError("Only RSA & EC keys are supported at this time.")
+
+        if rsa_padding is not None:
+            if not isinstance(rsa_padding, (padding.PSS, padding.PKCS1v15)):
+                raise TypeError("Padding must be PSS or PKCS1v15")
+            if not isinstance(private_key, rsa.RSAPrivateKey):
+                raise TypeError("Padding is only supported for RSA keys")
+
+        return PKCS7SignatureBuilder(
+            self._data,
+            [
+                *self._signers,
+                (certificate, private_key, hash_algorithm, rsa_padding),
+            ],
+        )
+
+    def add_certificate(
+        self, certificate: x509.Certificate
+    ) -> PKCS7SignatureBuilder:
+        if not isinstance(certificate, x509.Certificate):
+            raise TypeError("certificate must be a x509.Certificate")
+
+        return PKCS7SignatureBuilder(
+            self._data, self._signers, [*self._additional_certs, certificate]
+        )
+
+    def sign(
+        self,
+        encoding: serialization.Encoding,
+        options: Iterable[PKCS7Options],
+        backend: typing.Any = None,
+    ) -> bytes:
+        if len(self._signers) == 0:
+            raise ValueError("Must have at least one signer")
+        if self._data is None:
+            raise ValueError("You must add data to sign")
+        options = list(options)
+        if not all(isinstance(x, PKCS7Options) for x in options):
+            raise ValueError("options must be from the PKCS7Options enum")
+        if encoding not in (
+            serialization.Encoding.PEM,
+            serialization.Encoding.DER,
+            serialization.Encoding.SMIME,
+        ):
+            raise ValueError(
+                "Must be PEM, DER, or SMIME from the Encoding enum"
+            )
+
+        # Text is a meaningless option unless it is accompanied by
+        # DetachedSignature
+        if (
+            PKCS7Options.Text in options
+            and PKCS7Options.DetachedSignature not in options
+        ):
+            raise ValueError(
+                "When passing the Text option you must also pass "
+                "DetachedSignature"
+            )
+
+        if PKCS7Options.Text in options and encoding in (
+            serialization.Encoding.DER,
+            serialization.Encoding.PEM,
+        ):
+            raise ValueError(
+                "The Text option is only available for SMIME serialization"
+            )
+
+        # No attributes implies no capabilities so we'll error if you try to
+        # pass both.
+        if (
+            PKCS7Options.NoAttributes in options
+            and PKCS7Options.NoCapabilities in options
+        ):
+            raise ValueError(
+                "NoAttributes is a superset of NoCapabilities. Do not pass "
+                "both values."
+            )
+
+        return rust_pkcs7.sign_and_serialize(self, encoding, options)
+
+
+class PKCS7EnvelopeBuilder:
+    def __init__(
+        self,
+        *,
+        _data: bytes | None = None,
+        _recipients: list[x509.Certificate] | None = None,
+        _content_encryption_algorithm: ContentEncryptionAlgorithm
+        | None = None,
+    ):
+        from cryptography.hazmat.backends.openssl.backend import (
+            backend as ossl,
+        )
+
+        if not ossl.rsa_encryption_supported(padding=padding.PKCS1v15()):
+            raise UnsupportedAlgorithm(
+                "RSA with PKCS1 v1.5 padding is not supported by this version"
+                " of OpenSSL.",
+                _Reasons.UNSUPPORTED_PADDING,
+            )
+        self._data = _data
+        self._recipients = _recipients if _recipients is not None else []
+        self._content_encryption_algorithm = _content_encryption_algorithm
+
+    def set_data(self, data: bytes) -> PKCS7EnvelopeBuilder:
+        _check_byteslike("data", data)
+        if self._data is not None:
+            raise ValueError("data may only be set once")
+
+        return PKCS7EnvelopeBuilder(
+            _data=data,
+            _recipients=self._recipients,
+            _content_encryption_algorithm=self._content_encryption_algorithm,
+        )
+
+    def add_recipient(
+        self,
+        certificate: x509.Certificate,
+    ) -> PKCS7EnvelopeBuilder:
+        if not isinstance(certificate, x509.Certificate):
+            raise TypeError("certificate must be a x509.Certificate")
+
+        if not isinstance(certificate.public_key(), rsa.RSAPublicKey):
+            raise TypeError("Only RSA keys are supported at this time.")
+
+        return PKCS7EnvelopeBuilder(
+            _data=self._data,
+            _recipients=[
+                *self._recipients,
+                certificate,
+            ],
+            _content_encryption_algorithm=self._content_encryption_algorithm,
+        )
+
+    def set_content_encryption_algorithm(
+        self, content_encryption_algorithm: ContentEncryptionAlgorithm
+    ) -> PKCS7EnvelopeBuilder:
+        if self._content_encryption_algorithm is not None:
+            raise ValueError("Content encryption algo may only be set once")
+        if content_encryption_algorithm not in {
+            algorithms.AES128,
+            algorithms.AES256,
+        }:
+            raise TypeError("Only AES128 and AES256 are supported")
+
+        return PKCS7EnvelopeBuilder(
+            _data=self._data,
+            _recipients=self._recipients,
+            _content_encryption_algorithm=content_encryption_algorithm,
+        )
+
+    def encrypt(
+        self,
+        encoding: serialization.Encoding,
+        options: Iterable[PKCS7Options],
+    ) -> bytes:
+        if len(self._recipients) == 0:
+            raise ValueError("Must have at least one recipient")
+        if self._data is None:
+            raise ValueError("You must add data to encrypt")
+
+        # The default content encryption algorithm is AES-128-CBC, which the
+        # S/MIME v3.2 RFC specifies as MUST support (https://datatracker.ietf.org/doc/html/rfc5751#section-2.7)
+        # however rest of S/MIME v3.2 is not currently supported
+        content_encryption_algorithm = (
+            self._content_encryption_algorithm or algorithms.AES128
+        )
+
+        options = list(options)
+        if not all(isinstance(x, PKCS7Options) for x in options):
+            raise ValueError("options must be from the PKCS7Options enum")
+        if encoding not in (
+            serialization.Encoding.PEM,
+            serialization.Encoding.DER,
+            serialization.Encoding.SMIME,
+        ):
+            raise ValueError(
+                "Must be PEM, DER, or SMIME from the Encoding enum"
+            )
+
+        # Only allow options that make sense for encryption
+        if any(
+            opt not in [PKCS7Options.Text, PKCS7Options.Binary]
+            for opt in options
+        ):
+            raise ValueError(
+                "Only the following options are supported for encryption: "
+                "Text, Binary"
+            )
+        elif PKCS7Options.Text in options and PKCS7Options.Binary in options:
+            # OpenSSL accepts both options at the same time, but ignores Text.
+            # We fail defensively to avoid unexpected outputs.
+            raise ValueError(
+                "Cannot use Binary and Text options at the same time"
+            )
+
+        return rust_pkcs7.encrypt_and_serialize(
+            self, content_encryption_algorithm, encoding, options
+        )
+
+
+pkcs7_decrypt_der = rust_pkcs7.decrypt_der
+pkcs7_decrypt_pem = rust_pkcs7.decrypt_pem
+pkcs7_decrypt_smime = rust_pkcs7.decrypt_smime
+
+
+def _smime_signed_encode(
+    data: bytes, signature: bytes, micalg: str, text_mode: bool
+) -> bytes:
+    # This function works pretty hard to replicate what OpenSSL does
+    # precisely. For good and for ill.
+
+    m = email.message.Message()
+    m.add_header("MIME-Version", "1.0")
+    m.add_header(
+        "Content-Type",
+        "multipart/signed",
+        protocol="application/x-pkcs7-signature",
+        micalg=micalg,
+    )
+
+    m.preamble = "This is an S/MIME signed message\n"
+
+    msg_part = OpenSSLMimePart()
+    msg_part.set_payload(data)
+    if text_mode:
+        msg_part.add_header("Content-Type", "text/plain")
+    m.attach(msg_part)
+
+    sig_part = email.message.MIMEPart()
+    sig_part.add_header(
+        "Content-Type", "application/x-pkcs7-signature", name="smime.p7s"
+    )
+    sig_part.add_header("Content-Transfer-Encoding", "base64")
+    sig_part.add_header(
+        "Content-Disposition", "attachment", filename="smime.p7s"
+    )
+    sig_part.set_payload(
+        email.base64mime.body_encode(signature, maxlinelen=65)
+    )
+    del sig_part["MIME-Version"]
+    m.attach(sig_part)
+
+    fp = io.BytesIO()
+    g = email.generator.BytesGenerator(
+        fp,
+        maxheaderlen=0,
+        mangle_from_=False,
+        policy=m.policy.clone(linesep="\r\n"),
+    )
+    g.flatten(m)
+    return fp.getvalue()
+
+
+def _smime_enveloped_encode(data: bytes) -> bytes:
+    m = email.message.Message()
+    m.add_header("MIME-Version", "1.0")
+    m.add_header("Content-Disposition", "attachment", filename="smime.p7m")
+    m.add_header(
+        "Content-Type",
+        "application/pkcs7-mime",
+        smime_type="enveloped-data",
+        name="smime.p7m",
+    )
+    m.add_header("Content-Transfer-Encoding", "base64")
+
+    m.set_payload(email.base64mime.body_encode(data, maxlinelen=65))
+
+    return m.as_bytes(policy=m.policy.clone(linesep="\n", max_line_length=0))
+
+
+def _smime_enveloped_decode(data: bytes) -> bytes:
+    m = email.message_from_bytes(data)
+    if m.get_content_type() not in {
+        "application/x-pkcs7-mime",
+        "application/pkcs7-mime",
+    }:
+        raise ValueError("Not an S/MIME enveloped message")
+    return bytes(m.get_payload(decode=True))
+
+
+def _smime_remove_text_headers(data: bytes) -> bytes:
+    m = email.message_from_bytes(data)
+    # Using get() instead of get_content_type() since it has None as default,
+    # where the latter has "text/plain". Both methods are case-insensitive.
+    content_type = m.get("content-type")
+    if content_type is None:
+        raise ValueError(
+            "Decrypted MIME data has no 'Content-Type' header. "
+            "Please remove the 'Text' option to parse it manually."
+        )
+    if "text/plain" not in content_type:
+        raise ValueError(
+            f"Decrypted MIME data content type is '{content_type}', not "
+            "'text/plain'. Remove the 'Text' option to parse it manually."
+        )
+    return bytes(m.get_payload(decode=True))
+
+
+class OpenSSLMimePart(email.message.MIMEPart):
+    # A MIMEPart subclass that replicates OpenSSL's behavior of not including
+    # a newline if there are no headers.
+    def _write_headers(self, generator) -> None:
+        if list(self.raw_items()):
+            generator._write_headers(self)

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/serialization/ssh.py

@@ -0,0 +1,1615 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import binascii
+import enum
+import os
+import re
+import typing
+import warnings
+from dataclasses import dataclass
+
+from cryptography import utils
+from cryptography.exceptions import UnsupportedAlgorithm
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.asymmetric import (
+    dsa,
+    ec,
+    ed25519,
+    padding,
+    rsa,
+)
+from cryptography.hazmat.primitives.asymmetric import utils as asym_utils
+from cryptography.hazmat.primitives.ciphers import (
+    AEADDecryptionContext,
+    Cipher,
+    algorithms,
+    modes,
+)
+from cryptography.hazmat.primitives.serialization import (
+    Encoding,
+    KeySerializationEncryption,
+    NoEncryption,
+    PrivateFormat,
+    PublicFormat,
+    _KeySerializationEncryption,
+)
+
+try:
+    from bcrypt import kdf as _bcrypt_kdf
+
+    _bcrypt_supported = True
+except ImportError:
+    _bcrypt_supported = False
+
+    def _bcrypt_kdf(
+        password: bytes,
+        salt: bytes,
+        desired_key_bytes: int,
+        rounds: int,
+        ignore_few_rounds: bool = False,
+    ) -> bytes:
+        raise UnsupportedAlgorithm("Need bcrypt module")
+
+
+_SSH_ED25519 = b"ssh-ed25519"
+_SSH_RSA = b"ssh-rsa"
+_SSH_DSA = b"ssh-dss"
+_ECDSA_NISTP256 = b"ecdsa-sha2-nistp256"
+_ECDSA_NISTP384 = b"ecdsa-sha2-nistp384"
+_ECDSA_NISTP521 = b"ecdsa-sha2-nistp521"
+_CERT_SUFFIX = b"-cert-v01@openssh.com"
+
+# U2F application string suffixed pubkey
+_SK_SSH_ED25519 = b"sk-ssh-ed25519@openssh.com"
+_SK_SSH_ECDSA_NISTP256 = b"sk-ecdsa-sha2-nistp256@openssh.com"
+
+# These are not key types, only algorithms, so they cannot appear
+# as a public key type
+_SSH_RSA_SHA256 = b"rsa-sha2-256"
+_SSH_RSA_SHA512 = b"rsa-sha2-512"
+
+_SSH_PUBKEY_RC = re.compile(rb"\A(\S+)[ \t]+(\S+)")
+_SK_MAGIC = b"openssh-key-v1\0"
+_SK_START = b"-----BEGIN OPENSSH PRIVATE KEY-----"
+_SK_END = b"-----END OPENSSH PRIVATE KEY-----"
+_BCRYPT = b"bcrypt"
+_NONE = b"none"
+_DEFAULT_CIPHER = b"aes256-ctr"
+_DEFAULT_ROUNDS = 16
+
+# re is only way to work on bytes-like data
+_PEM_RC = re.compile(_SK_START + b"(.*?)" + _SK_END, re.DOTALL)
+
+# padding for max blocksize
+_PADDING = memoryview(bytearray(range(1, 1 + 16)))
+
+
+@dataclass
+class _SSHCipher:
+    alg: type[algorithms.AES]
+    key_len: int
+    mode: type[modes.CTR] | type[modes.CBC] | type[modes.GCM]
+    block_len: int
+    iv_len: int
+    tag_len: int | None
+    is_aead: bool
+
+
+# ciphers that are actually used in key wrapping
+_SSH_CIPHERS: dict[bytes, _SSHCipher] = {
+    b"aes256-ctr": _SSHCipher(
+        alg=algorithms.AES,
+        key_len=32,
+        mode=modes.CTR,
+        block_len=16,
+        iv_len=16,
+        tag_len=None,
+        is_aead=False,
+    ),
+    b"aes256-cbc": _SSHCipher(
+        alg=algorithms.AES,
+        key_len=32,
+        mode=modes.CBC,
+        block_len=16,
+        iv_len=16,
+        tag_len=None,
+        is_aead=False,
+    ),
+    b"aes256-gcm@openssh.com": _SSHCipher(
+        alg=algorithms.AES,
+        key_len=32,
+        mode=modes.GCM,
+        block_len=16,
+        iv_len=12,
+        tag_len=16,
+        is_aead=True,
+    ),
+}
+
+# map local curve name to key type
+_ECDSA_KEY_TYPE = {
+    "secp256r1": _ECDSA_NISTP256,
+    "secp384r1": _ECDSA_NISTP384,
+    "secp521r1": _ECDSA_NISTP521,
+}
+
+
+def _get_ssh_key_type(key: SSHPrivateKeyTypes | SSHPublicKeyTypes) -> bytes:
+    if isinstance(key, ec.EllipticCurvePrivateKey):
+        key_type = _ecdsa_key_type(key.public_key())
+    elif isinstance(key, ec.EllipticCurvePublicKey):
+        key_type = _ecdsa_key_type(key)
+    elif isinstance(key, (rsa.RSAPrivateKey, rsa.RSAPublicKey)):
+        key_type = _SSH_RSA
+    elif isinstance(key, (dsa.DSAPrivateKey, dsa.DSAPublicKey)):
+        key_type = _SSH_DSA
+    elif isinstance(
+        key, (ed25519.Ed25519PrivateKey, ed25519.Ed25519PublicKey)
+    ):
+        key_type = _SSH_ED25519
+    else:
+        raise ValueError("Unsupported key type")
+
+    return key_type
+
+
+def _ecdsa_key_type(public_key: ec.EllipticCurvePublicKey) -> bytes:
+    """Return SSH key_type and curve_name for private key."""
+    curve = public_key.curve
+    if curve.name not in _ECDSA_KEY_TYPE:
+        raise ValueError(
+            f"Unsupported curve for ssh private key: {curve.name!r}"
+        )
+    return _ECDSA_KEY_TYPE[curve.name]
+
+
+def _check_block_size(data: utils.Buffer, block_len: int) -> None:
+    """Require data to be full blocks"""
+    if not data or len(data) % block_len != 0:
+        raise ValueError("Corrupt data: missing padding")
+
+
+def _check_empty(data: utils.Buffer) -> None:
+    """All data should have been parsed."""
+    if data:
+        raise ValueError("Corrupt data: unparsed data")
+
+
+def _init_cipher(
+    ciphername: bytes,
+    password: bytes | None,
+    salt: bytes,
+    rounds: int,
+) -> Cipher[modes.CBC | modes.CTR | modes.GCM]:
+    """Generate key + iv and return cipher."""
+    if not password:
+        raise TypeError(
+            "Key is password-protected, but password was not provided."
+        )
+
+    ciph = _SSH_CIPHERS[ciphername]
+    seed = _bcrypt_kdf(
+        password, salt, ciph.key_len + ciph.iv_len, rounds, True
+    )
+    return Cipher(
+        ciph.alg(seed[: ciph.key_len]),
+        ciph.mode(seed[ciph.key_len :]),
+    )
+
+
+def _get_u32(data: memoryview) -> tuple[int, memoryview]:
+    """Uint32"""
+    if len(data) < 4:
+        raise ValueError("Invalid data")
+    return int.from_bytes(data[:4], byteorder="big"), data[4:]
+
+
+def _get_u64(data: memoryview) -> tuple[int, memoryview]:
+    """Uint64"""
+    if len(data) < 8:
+        raise ValueError("Invalid data")
+    return int.from_bytes(data[:8], byteorder="big"), data[8:]
+
+
+def _get_sshstr(data: memoryview) -> tuple[memoryview, memoryview]:
+    """Bytes with u32 length prefix"""
+    n, data = _get_u32(data)
+    if n > len(data):
+        raise ValueError("Invalid data")
+    return data[:n], data[n:]
+
+
+def _get_mpint(data: memoryview) -> tuple[int, memoryview]:
+    """Big integer."""
+    val, data = _get_sshstr(data)
+    if val and val[0] > 0x7F:
+        raise ValueError("Invalid data")
+    return int.from_bytes(val, "big"), data
+
+
+def _to_mpint(val: int) -> bytes:
+    """Storage format for signed bigint."""
+    if val < 0:
+        raise ValueError("negative mpint not allowed")
+    if not val:
+        return b""
+    nbytes = (val.bit_length() + 8) // 8
+    return utils.int_to_bytes(val, nbytes)
+
+
+class _FragList:
+    """Build recursive structure without data copy."""
+
+    flist: list[utils.Buffer]
+
+    def __init__(self, init: list[utils.Buffer] | None = None) -> None:
+        self.flist = []
+        if init:
+            self.flist.extend(init)
+
+    def put_raw(self, val: utils.Buffer) -> None:
+        """Add plain bytes"""
+        self.flist.append(val)
+
+    def put_u32(self, val: int) -> None:
+        """Big-endian uint32"""
+        self.flist.append(val.to_bytes(length=4, byteorder="big"))
+
+    def put_u64(self, val: int) -> None:
+        """Big-endian uint64"""
+        self.flist.append(val.to_bytes(length=8, byteorder="big"))
+
+    def put_sshstr(self, val: bytes | _FragList) -> None:
+        """Bytes prefixed with u32 length"""
+        if isinstance(val, (bytes, memoryview, bytearray)):
+            self.put_u32(len(val))
+            self.flist.append(val)
+        else:
+            self.put_u32(val.size())
+            self.flist.extend(val.flist)
+
+    def put_mpint(self, val: int) -> None:
+        """Big-endian bigint prefixed with u32 length"""
+        self.put_sshstr(_to_mpint(val))
+
+    def size(self) -> int:
+        """Current number of bytes"""
+        return sum(map(len, self.flist))
+
+    def render(self, dstbuf: memoryview, pos: int = 0) -> int:
+        """Write into bytearray"""
+        for frag in self.flist:
+            flen = len(frag)
+            start, pos = pos, pos + flen
+            dstbuf[start:pos] = frag
+        return pos
+
+    def tobytes(self) -> bytes:
+        """Return as bytes"""
+        buf = memoryview(bytearray(self.size()))
+        self.render(buf)
+        return buf.tobytes()
+
+
+class _SSHFormatRSA:
+    """Format for RSA keys.
+
+    Public:
+        mpint e, n
+    Private:
+        mpint n, e, d, iqmp, p, q
+    """
+
+    def get_public(
+        self, data: memoryview
+    ) -> tuple[tuple[int, int], memoryview]:
+        """RSA public fields"""
+        e, data = _get_mpint(data)
+        n, data = _get_mpint(data)
+        return (e, n), data
+
+    def load_public(
+        self, data: memoryview
+    ) -> tuple[rsa.RSAPublicKey, memoryview]:
+        """Make RSA public key from data."""
+        (e, n), data = self.get_public(data)
+        public_numbers = rsa.RSAPublicNumbers(e, n)
+        public_key = public_numbers.public_key()
+        return public_key, data
+
+    def load_private(
+        self, data: memoryview, pubfields, unsafe_skip_rsa_key_validation: bool
+    ) -> tuple[rsa.RSAPrivateKey, memoryview]:
+        """Make RSA private key from data."""
+        n, data = _get_mpint(data)
+        e, data = _get_mpint(data)
+        d, data = _get_mpint(data)
+        iqmp, data = _get_mpint(data)
+        p, data = _get_mpint(data)
+        q, data = _get_mpint(data)
+
+        if (e, n) != pubfields:
+            raise ValueError("Corrupt data: rsa field mismatch")
+        dmp1 = rsa.rsa_crt_dmp1(d, p)
+        dmq1 = rsa.rsa_crt_dmq1(d, q)
+        public_numbers = rsa.RSAPublicNumbers(e, n)
+        private_numbers = rsa.RSAPrivateNumbers(
+            p, q, d, dmp1, dmq1, iqmp, public_numbers
+        )
+        private_key = private_numbers.private_key(
+            unsafe_skip_rsa_key_validation=unsafe_skip_rsa_key_validation
+        )
+        return private_key, data
+
+    def encode_public(
+        self, public_key: rsa.RSAPublicKey, f_pub: _FragList
+    ) -> None:
+        """Write RSA public key"""
+        pubn = public_key.public_numbers()
+        f_pub.put_mpint(pubn.e)
+        f_pub.put_mpint(pubn.n)
+
+    def encode_private(
+        self, private_key: rsa.RSAPrivateKey, f_priv: _FragList
+    ) -> None:
+        """Write RSA private key"""
+        private_numbers = private_key.private_numbers()
+        public_numbers = private_numbers.public_numbers
+
+        f_priv.put_mpint(public_numbers.n)
+        f_priv.put_mpint(public_numbers.e)
+
+        f_priv.put_mpint(private_numbers.d)
+        f_priv.put_mpint(private_numbers.iqmp)
+        f_priv.put_mpint(private_numbers.p)
+        f_priv.put_mpint(private_numbers.q)
+
+
+class _SSHFormatDSA:
+    """Format for DSA keys.
+
+    Public:
+        mpint p, q, g, y
+    Private:
+        mpint p, q, g, y, x
+    """
+
+    def get_public(self, data: memoryview) -> tuple[tuple, memoryview]:
+        """DSA public fields"""
+        p, data = _get_mpint(data)
+        q, data = _get_mpint(data)
+        g, data = _get_mpint(data)
+        y, data = _get_mpint(data)
+        return (p, q, g, y), data
+
+    def load_public(
+        self, data: memoryview
+    ) -> tuple[dsa.DSAPublicKey, memoryview]:
+        """Make DSA public key from data."""
+        (p, q, g, y), data = self.get_public(data)
+        parameter_numbers = dsa.DSAParameterNumbers(p, q, g)
+        public_numbers = dsa.DSAPublicNumbers(y, parameter_numbers)
+        self._validate(public_numbers)
+        public_key = public_numbers.public_key()
+        return public_key, data
+
+    def load_private(
+        self, data: memoryview, pubfields, unsafe_skip_rsa_key_validation: bool
+    ) -> tuple[dsa.DSAPrivateKey, memoryview]:
+        """Make DSA private key from data."""
+        (p, q, g, y), data = self.get_public(data)
+        x, data = _get_mpint(data)
+
+        if (p, q, g, y) != pubfields:
+            raise ValueError("Corrupt data: dsa field mismatch")
+        parameter_numbers = dsa.DSAParameterNumbers(p, q, g)
+        public_numbers = dsa.DSAPublicNumbers(y, parameter_numbers)
+        self._validate(public_numbers)
+        private_numbers = dsa.DSAPrivateNumbers(x, public_numbers)
+        private_key = private_numbers.private_key()
+        return private_key, data
+
+    def encode_public(
+        self, public_key: dsa.DSAPublicKey, f_pub: _FragList
+    ) -> None:
+        """Write DSA public key"""
+        public_numbers = public_key.public_numbers()
+        parameter_numbers = public_numbers.parameter_numbers
+        self._validate(public_numbers)
+
+        f_pub.put_mpint(parameter_numbers.p)
+        f_pub.put_mpint(parameter_numbers.q)
+        f_pub.put_mpint(parameter_numbers.g)
+        f_pub.put_mpint(public_numbers.y)
+
+    def encode_private(
+        self, private_key: dsa.DSAPrivateKey, f_priv: _FragList
+    ) -> None:
+        """Write DSA private key"""
+        self.encode_public(private_key.public_key(), f_priv)
+        f_priv.put_mpint(private_key.private_numbers().x)
+
+    def _validate(self, public_numbers: dsa.DSAPublicNumbers) -> None:
+        parameter_numbers = public_numbers.parameter_numbers
+        if parameter_numbers.p.bit_length() != 1024:
+            raise ValueError("SSH supports only 1024 bit DSA keys")
+
+
+class _SSHFormatECDSA:
+    """Format for ECDSA keys.
+
+    Public:
+        str curve
+        bytes point
+    Private:
+        str curve
+        bytes point
+        mpint secret
+    """
+
+    def __init__(self, ssh_curve_name: bytes, curve: ec.EllipticCurve):
+        self.ssh_curve_name = ssh_curve_name
+        self.curve = curve
+
+    def get_public(
+        self, data: memoryview
+    ) -> tuple[tuple[memoryview, memoryview], memoryview]:
+        """ECDSA public fields"""
+        curve, data = _get_sshstr(data)
+        point, data = _get_sshstr(data)
+        if curve != self.ssh_curve_name:
+            raise ValueError("Curve name mismatch")
+        if len(point) == 0:
+            raise ValueError("Invalid EC point: empty data")
+        if point[0] != 4:
+            raise NotImplementedError("Need uncompressed point")
+        return (curve, point), data
+
+    def load_public(
+        self, data: memoryview
+    ) -> tuple[ec.EllipticCurvePublicKey, memoryview]:
+        """Make ECDSA public key from data."""
+        (_, point), data = self.get_public(data)
+        public_key = ec.EllipticCurvePublicKey.from_encoded_point(
+            self.curve, point.tobytes()
+        )
+        return public_key, data
+
+    def load_private(
+        self, data: memoryview, pubfields, unsafe_skip_rsa_key_validation: bool
+    ) -> tuple[ec.EllipticCurvePrivateKey, memoryview]:
+        """Make ECDSA private key from data."""
+        (curve_name, point), data = self.get_public(data)
+        secret, data = _get_mpint(data)
+
+        if (curve_name, point) != pubfields:
+            raise ValueError("Corrupt data: ecdsa field mismatch")
+        private_key = ec.derive_private_key(secret, self.curve)
+        return private_key, data
+
+    def encode_public(
+        self, public_key: ec.EllipticCurvePublicKey, f_pub: _FragList
+    ) -> None:
+        """Write ECDSA public key"""
+        point = public_key.public_bytes(
+            Encoding.X962, PublicFormat.UncompressedPoint
+        )
+        f_pub.put_sshstr(self.ssh_curve_name)
+        f_pub.put_sshstr(point)
+
+    def encode_private(
+        self, private_key: ec.EllipticCurvePrivateKey, f_priv: _FragList
+    ) -> None:
+        """Write ECDSA private key"""
+        public_key = private_key.public_key()
+        private_numbers = private_key.private_numbers()
+
+        self.encode_public(public_key, f_priv)
+        f_priv.put_mpint(private_numbers.private_value)
+
+
+class _SSHFormatEd25519:
+    """Format for Ed25519 keys.
+
+    Public:
+        bytes point
+    Private:
+        bytes point
+        bytes secret_and_point
+    """
+
+    def get_public(
+        self, data: memoryview
+    ) -> tuple[tuple[memoryview], memoryview]:
+        """Ed25519 public fields"""
+        point, data = _get_sshstr(data)
+        return (point,), data
+
+    def load_public(
+        self, data: memoryview
+    ) -> tuple[ed25519.Ed25519PublicKey, memoryview]:
+        """Make Ed25519 public key from data."""
+        (point,), data = self.get_public(data)
+        public_key = ed25519.Ed25519PublicKey.from_public_bytes(
+            point.tobytes()
+        )
+        return public_key, data
+
+    def load_private(
+        self, data: memoryview, pubfields, unsafe_skip_rsa_key_validation: bool
+    ) -> tuple[ed25519.Ed25519PrivateKey, memoryview]:
+        """Make Ed25519 private key from data."""
+        (point,), data = self.get_public(data)
+        keypair, data = _get_sshstr(data)
+
+        secret = keypair[:32]
+        point2 = keypair[32:]
+        if point != point2 or (point,) != pubfields:
+            raise ValueError("Corrupt data: ed25519 field mismatch")
+        private_key = ed25519.Ed25519PrivateKey.from_private_bytes(secret)
+        return private_key, data
+
+    def encode_public(
+        self, public_key: ed25519.Ed25519PublicKey, f_pub: _FragList
+    ) -> None:
+        """Write Ed25519 public key"""
+        raw_public_key = public_key.public_bytes(
+            Encoding.Raw, PublicFormat.Raw
+        )
+        f_pub.put_sshstr(raw_public_key)
+
+    def encode_private(
+        self, private_key: ed25519.Ed25519PrivateKey, f_priv: _FragList
+    ) -> None:
+        """Write Ed25519 private key"""
+        public_key = private_key.public_key()
+        raw_private_key = private_key.private_bytes(
+            Encoding.Raw, PrivateFormat.Raw, NoEncryption()
+        )
+        raw_public_key = public_key.public_bytes(
+            Encoding.Raw, PublicFormat.Raw
+        )
+        f_keypair = _FragList([raw_private_key, raw_public_key])
+
+        self.encode_public(public_key, f_priv)
+        f_priv.put_sshstr(f_keypair)
+
+
+def load_application(data) -> tuple[memoryview, memoryview]:
+    """
+    U2F application strings
+    """
+    application, data = _get_sshstr(data)
+    if not application.tobytes().startswith(b"ssh:"):
+        raise ValueError(
+            "U2F application string does not start with b'ssh:' "
+            f"({application})"
+        )
+    return application, data
+
+
+class _SSHFormatSKEd25519:
+    """
+    The format of a sk-ssh-ed25519@openssh.com public key is:
+
+        string		"sk-ssh-ed25519@openssh.com"
+        string		public key
+        string		application (user-specified, but typically "ssh:")
+    """
+
+    def load_public(
+        self, data: memoryview
+    ) -> tuple[ed25519.Ed25519PublicKey, memoryview]:
+        """Make Ed25519 public key from data."""
+        public_key, data = _lookup_kformat(_SSH_ED25519).load_public(data)
+        _, data = load_application(data)
+        return public_key, data
+
+    def get_public(self, data: memoryview) -> typing.NoReturn:
+        # Confusingly `get_public` is an entry point used by private key
+        # loading.
+        raise UnsupportedAlgorithm(
+            "sk-ssh-ed25519 private keys cannot be loaded"
+        )
+
+
+class _SSHFormatSKECDSA:
+    """
+    The format of a sk-ecdsa-sha2-nistp256@openssh.com public key is:
+
+        string		"sk-ecdsa-sha2-nistp256@openssh.com"
+        string		curve name
+        ec_point	Q
+        string		application (user-specified, but typically "ssh:")
+    """
+
+    def load_public(
+        self, data: memoryview
+    ) -> tuple[ec.EllipticCurvePublicKey, memoryview]:
+        """Make ECDSA public key from data."""
+        public_key, data = _lookup_kformat(_ECDSA_NISTP256).load_public(data)
+        _, data = load_application(data)
+        return public_key, data
+
+    def get_public(self, data: memoryview) -> typing.NoReturn:
+        # Confusingly `get_public` is an entry point used by private key
+        # loading.
+        raise UnsupportedAlgorithm(
+            "sk-ecdsa-sha2-nistp256 private keys cannot be loaded"
+        )
+
+
+_KEY_FORMATS = {
+    _SSH_RSA: _SSHFormatRSA(),
+    _SSH_DSA: _SSHFormatDSA(),
+    _SSH_ED25519: _SSHFormatEd25519(),
+    _ECDSA_NISTP256: _SSHFormatECDSA(b"nistp256", ec.SECP256R1()),
+    _ECDSA_NISTP384: _SSHFormatECDSA(b"nistp384", ec.SECP384R1()),
+    _ECDSA_NISTP521: _SSHFormatECDSA(b"nistp521", ec.SECP521R1()),
+    _SK_SSH_ED25519: _SSHFormatSKEd25519(),
+    _SK_SSH_ECDSA_NISTP256: _SSHFormatSKECDSA(),
+}
+
+
+def _lookup_kformat(key_type: utils.Buffer):
+    """Return valid format or throw error"""
+    if not isinstance(key_type, bytes):
+        key_type = memoryview(key_type).tobytes()
+    if key_type in _KEY_FORMATS:
+        return _KEY_FORMATS[key_type]
+    raise UnsupportedAlgorithm(f"Unsupported key type: {key_type!r}")
+
+
+SSHPrivateKeyTypes = typing.Union[
+    ec.EllipticCurvePrivateKey,
+    rsa.RSAPrivateKey,
+    dsa.DSAPrivateKey,
+    ed25519.Ed25519PrivateKey,
+]
+
+
+def load_ssh_private_key(
+    data: utils.Buffer,
+    password: bytes | None,
+    backend: typing.Any = None,
+    *,
+    unsafe_skip_rsa_key_validation: bool = False,
+) -> SSHPrivateKeyTypes:
+    """Load private key from OpenSSH custom encoding."""
+    utils._check_byteslike("data", data)
+    if password is not None:
+        utils._check_bytes("password", password)
+
+    m = _PEM_RC.search(data)
+    if not m:
+        raise ValueError("Not OpenSSH private key format")
+    p1 = m.start(1)
+    p2 = m.end(1)
+    data = binascii.a2b_base64(memoryview(data)[p1:p2])
+    if not data.startswith(_SK_MAGIC):
+        raise ValueError("Not OpenSSH private key format")
+    data = memoryview(data)[len(_SK_MAGIC) :]
+
+    # parse header
+    ciphername, data = _get_sshstr(data)
+    kdfname, data = _get_sshstr(data)
+    kdfoptions, data = _get_sshstr(data)
+    nkeys, data = _get_u32(data)
+    if nkeys != 1:
+        raise ValueError("Only one key supported")
+
+    # load public key data
+    pubdata, data = _get_sshstr(data)
+    pub_key_type, pubdata = _get_sshstr(pubdata)
+    kformat = _lookup_kformat(pub_key_type)
+    pubfields, pubdata = kformat.get_public(pubdata)
+    _check_empty(pubdata)
+
+    if ciphername != _NONE or kdfname != _NONE:
+        ciphername_bytes = ciphername.tobytes()
+        if ciphername_bytes not in _SSH_CIPHERS:
+            raise UnsupportedAlgorithm(
+                f"Unsupported cipher: {ciphername_bytes!r}"
+            )
+        if kdfname != _BCRYPT:
+            raise UnsupportedAlgorithm(f"Unsupported KDF: {kdfname!r}")
+        blklen = _SSH_CIPHERS[ciphername_bytes].block_len
+        tag_len = _SSH_CIPHERS[ciphername_bytes].tag_len
+        # load secret data
+        edata, data = _get_sshstr(data)
+        # see https://bugzilla.mindrot.org/show_bug.cgi?id=3553 for
+        # information about how OpenSSH handles AEAD tags
+        if _SSH_CIPHERS[ciphername_bytes].is_aead:
+            tag = bytes(data)
+            if len(tag) != tag_len:
+                raise ValueError("Corrupt data: invalid tag length for cipher")
+        else:
+            _check_empty(data)
+        _check_block_size(edata, blklen)
+        salt, kbuf = _get_sshstr(kdfoptions)
+        rounds, kbuf = _get_u32(kbuf)
+        _check_empty(kbuf)
+        ciph = _init_cipher(ciphername_bytes, password, salt.tobytes(), rounds)
+        dec = ciph.decryptor()
+        edata = memoryview(dec.update(edata))
+        if _SSH_CIPHERS[ciphername_bytes].is_aead:
+            assert isinstance(dec, AEADDecryptionContext)
+            _check_empty(dec.finalize_with_tag(tag))
+        else:
+            # _check_block_size requires data to be a full block so there
+            # should be no output from finalize
+            _check_empty(dec.finalize())
+    else:
+        if password:
+            raise TypeError(
+                "Password was given but private key is not encrypted."
+            )
+        # load secret data
+        edata, data = _get_sshstr(data)
+        _check_empty(data)
+        blklen = 8
+        _check_block_size(edata, blklen)
+    ck1, edata = _get_u32(edata)
+    ck2, edata = _get_u32(edata)
+    if ck1 != ck2:
+        raise ValueError("Corrupt data: broken checksum")
+
+    # load per-key struct
+    key_type, edata = _get_sshstr(edata)
+    if key_type != pub_key_type:
+        raise ValueError("Corrupt data: key type mismatch")
+    private_key, edata = kformat.load_private(
+        edata,
+        pubfields,
+        unsafe_skip_rsa_key_validation=unsafe_skip_rsa_key_validation,
+    )
+    # We don't use the comment
+    _, edata = _get_sshstr(edata)
+
+    # yes, SSH does padding check *after* all other parsing is done.
+    # need to follow as it writes zero-byte padding too.
+    if edata != _PADDING[: len(edata)]:
+        raise ValueError("Corrupt data: invalid padding")
+
+    if isinstance(private_key, dsa.DSAPrivateKey):
+        warnings.warn(
+            "SSH DSA keys are deprecated and will be removed in a future "
+            "release.",
+            utils.DeprecatedIn40,
+            stacklevel=2,
+        )
+
+    return private_key
+
+
+def _serialize_ssh_private_key(
+    private_key: SSHPrivateKeyTypes,
+    password: bytes,
+    encryption_algorithm: KeySerializationEncryption,
+) -> bytes:
+    """Serialize private key with OpenSSH custom encoding."""
+    utils._check_bytes("password", password)
+    if isinstance(private_key, dsa.DSAPrivateKey):
+        warnings.warn(
+            "SSH DSA key support is deprecated and will be "
+            "removed in a future release",
+            utils.DeprecatedIn40,
+            stacklevel=4,
+        )
+
+    key_type = _get_ssh_key_type(private_key)
+    kformat = _lookup_kformat(key_type)
+
+    # setup parameters
+    f_kdfoptions = _FragList()
+    if password:
+        ciphername = _DEFAULT_CIPHER
+        blklen = _SSH_CIPHERS[ciphername].block_len
+        kdfname = _BCRYPT
+        rounds = _DEFAULT_ROUNDS
+        if (
+            isinstance(encryption_algorithm, _KeySerializationEncryption)
+            and encryption_algorithm._kdf_rounds is not None
+        ):
+            rounds = encryption_algorithm._kdf_rounds
+        salt = os.urandom(16)
+        f_kdfoptions.put_sshstr(salt)
+        f_kdfoptions.put_u32(rounds)
+        ciph = _init_cipher(ciphername, password, salt, rounds)
+    else:
+        ciphername = kdfname = _NONE
+        blklen = 8
+        ciph = None
+    nkeys = 1
+    checkval = os.urandom(4)
+    comment = b""
+
+    # encode public and private parts together
+    f_public_key = _FragList()
+    f_public_key.put_sshstr(key_type)
+    kformat.encode_public(private_key.public_key(), f_public_key)
+
+    f_secrets = _FragList([checkval, checkval])
+    f_secrets.put_sshstr(key_type)
+    kformat.encode_private(private_key, f_secrets)
+    f_secrets.put_sshstr(comment)
+    f_secrets.put_raw(_PADDING[: blklen - (f_secrets.size() % blklen)])
+
+    # top-level structure
+    f_main = _FragList()
+    f_main.put_raw(_SK_MAGIC)
+    f_main.put_sshstr(ciphername)
+    f_main.put_sshstr(kdfname)
+    f_main.put_sshstr(f_kdfoptions)
+    f_main.put_u32(nkeys)
+    f_main.put_sshstr(f_public_key)
+    f_main.put_sshstr(f_secrets)
+
+    # copy result info bytearray
+    slen = f_secrets.size()
+    mlen = f_main.size()
+    buf = memoryview(bytearray(mlen + blklen))
+    f_main.render(buf)
+    ofs = mlen - slen
+
+    # encrypt in-place
+    if ciph is not None:
+        ciph.encryptor().update_into(buf[ofs:mlen], buf[ofs:])
+
+    return bytes(buf[:mlen])
+
+
+SSHPublicKeyTypes = typing.Union[
+    ec.EllipticCurvePublicKey,
+    rsa.RSAPublicKey,
+    dsa.DSAPublicKey,
+    ed25519.Ed25519PublicKey,
+]
+
+SSHCertPublicKeyTypes = typing.Union[
+    ec.EllipticCurvePublicKey,
+    rsa.RSAPublicKey,
+    ed25519.Ed25519PublicKey,
+]
+
+
+class SSHCertificateType(enum.Enum):
+    USER = 1
+    HOST = 2
+
+
+class SSHCertificate:
+    def __init__(
+        self,
+        _nonce: memoryview,
+        _public_key: SSHPublicKeyTypes,
+        _serial: int,
+        _cctype: int,
+        _key_id: memoryview,
+        _valid_principals: list[bytes],
+        _valid_after: int,
+        _valid_before: int,
+        _critical_options: dict[bytes, bytes],
+        _extensions: dict[bytes, bytes],
+        _sig_type: memoryview,
+        _sig_key: memoryview,
+        _inner_sig_type: memoryview,
+        _signature: memoryview,
+        _tbs_cert_body: memoryview,
+        _cert_key_type: bytes,
+        _cert_body: memoryview,
+    ):
+        self._nonce = _nonce
+        self._public_key = _public_key
+        self._serial = _serial
+        try:
+            self._type = SSHCertificateType(_cctype)
+        except ValueError:
+            raise ValueError("Invalid certificate type")
+        self._key_id = _key_id
+        self._valid_principals = _valid_principals
+        self._valid_after = _valid_after
+        self._valid_before = _valid_before
+        self._critical_options = _critical_options
+        self._extensions = _extensions
+        self._sig_type = _sig_type
+        self._sig_key = _sig_key
+        self._inner_sig_type = _inner_sig_type
+        self._signature = _signature
+        self._cert_key_type = _cert_key_type
+        self._cert_body = _cert_body
+        self._tbs_cert_body = _tbs_cert_body
+
+    @property
+    def nonce(self) -> bytes:
+        return bytes(self._nonce)
+
+    def public_key(self) -> SSHCertPublicKeyTypes:
+        # make mypy happy until we remove DSA support entirely and
+        # the underlying union won't have a disallowed type
+        return typing.cast(SSHCertPublicKeyTypes, self._public_key)
+
+    @property
+    def serial(self) -> int:
+        return self._serial
+
+    @property
+    def type(self) -> SSHCertificateType:
+        return self._type
+
+    @property
+    def key_id(self) -> bytes:
+        return bytes(self._key_id)
+
+    @property
+    def valid_principals(self) -> list[bytes]:
+        return self._valid_principals
+
+    @property
+    def valid_before(self) -> int:
+        return self._valid_before
+
+    @property
+    def valid_after(self) -> int:
+        return self._valid_after
+
+    @property
+    def critical_options(self) -> dict[bytes, bytes]:
+        return self._critical_options
+
+    @property
+    def extensions(self) -> dict[bytes, bytes]:
+        return self._extensions
+
+    def signature_key(self) -> SSHCertPublicKeyTypes:
+        sigformat = _lookup_kformat(self._sig_type)
+        signature_key, sigkey_rest = sigformat.load_public(self._sig_key)
+        _check_empty(sigkey_rest)
+        return signature_key
+
+    def public_bytes(self) -> bytes:
+        return (
+            bytes(self._cert_key_type)
+            + b" "
+            + binascii.b2a_base64(bytes(self._cert_body), newline=False)
+        )
+
+    def verify_cert_signature(self) -> None:
+        signature_key = self.signature_key()
+        if isinstance(signature_key, ed25519.Ed25519PublicKey):
+            signature_key.verify(
+                bytes(self._signature), bytes(self._tbs_cert_body)
+            )
+        elif isinstance(signature_key, ec.EllipticCurvePublicKey):
+            # The signature is encoded as a pair of big-endian integers
+            r, data = _get_mpint(self._signature)
+            s, data = _get_mpint(data)
+            _check_empty(data)
+            computed_sig = asym_utils.encode_dss_signature(r, s)
+            hash_alg = _get_ec_hash_alg(signature_key.curve)
+            signature_key.verify(
+                computed_sig, bytes(self._tbs_cert_body), ec.ECDSA(hash_alg)
+            )
+        else:
+            assert isinstance(signature_key, rsa.RSAPublicKey)
+            if self._inner_sig_type == _SSH_RSA:
+                hash_alg = hashes.SHA1()
+            elif self._inner_sig_type == _SSH_RSA_SHA256:
+                hash_alg = hashes.SHA256()
+            else:
+                assert self._inner_sig_type == _SSH_RSA_SHA512
+                hash_alg = hashes.SHA512()
+            signature_key.verify(
+                bytes(self._signature),
+                bytes(self._tbs_cert_body),
+                padding.PKCS1v15(),
+                hash_alg,
+            )
+
+
+def _get_ec_hash_alg(curve: ec.EllipticCurve) -> hashes.HashAlgorithm:
+    if isinstance(curve, ec.SECP256R1):
+        return hashes.SHA256()
+    elif isinstance(curve, ec.SECP384R1):
+        return hashes.SHA384()
+    else:
+        assert isinstance(curve, ec.SECP521R1)
+        return hashes.SHA512()
+
+
+def _load_ssh_public_identity(
+    data: utils.Buffer,
+    _legacy_dsa_allowed=False,
+) -> SSHCertificate | SSHPublicKeyTypes:
+    utils._check_byteslike("data", data)
+
+    m = _SSH_PUBKEY_RC.match(data)
+    if not m:
+        raise ValueError("Invalid line format")
+    key_type = orig_key_type = m.group(1)
+    key_body = m.group(2)
+    with_cert = False
+    if key_type.endswith(_CERT_SUFFIX):
+        with_cert = True
+        key_type = key_type[: -len(_CERT_SUFFIX)]
+    if key_type == _SSH_DSA and not _legacy_dsa_allowed:
+        raise UnsupportedAlgorithm(
+            "DSA keys aren't supported in SSH certificates"
+        )
+    kformat = _lookup_kformat(key_type)
+
+    try:
+        rest = memoryview(binascii.a2b_base64(key_body))
+    except (TypeError, binascii.Error):
+        raise ValueError("Invalid format")
+
+    if with_cert:
+        cert_body = rest
+    inner_key_type, rest = _get_sshstr(rest)
+    if inner_key_type != orig_key_type:
+        raise ValueError("Invalid key format")
+    if with_cert:
+        nonce, rest = _get_sshstr(rest)
+    public_key, rest = kformat.load_public(rest)
+    if with_cert:
+        serial, rest = _get_u64(rest)
+        cctype, rest = _get_u32(rest)
+        key_id, rest = _get_sshstr(rest)
+        principals, rest = _get_sshstr(rest)
+        valid_principals = []
+        while principals:
+            principal, principals = _get_sshstr(principals)
+            valid_principals.append(bytes(principal))
+        valid_after, rest = _get_u64(rest)
+        valid_before, rest = _get_u64(rest)
+        crit_options, rest = _get_sshstr(rest)
+        critical_options = _parse_exts_opts(crit_options)
+        exts, rest = _get_sshstr(rest)
+        extensions = _parse_exts_opts(exts)
+        # Get the reserved field, which is unused.
+        _, rest = _get_sshstr(rest)
+        sig_key_raw, rest = _get_sshstr(rest)
+        sig_type, sig_key = _get_sshstr(sig_key_raw)
+        if sig_type == _SSH_DSA and not _legacy_dsa_allowed:
+            raise UnsupportedAlgorithm(
+                "DSA signatures aren't supported in SSH certificates"
+            )
+        # Get the entire cert body and subtract the signature
+        tbs_cert_body = cert_body[: -len(rest)]
+        signature_raw, rest = _get_sshstr(rest)
+        _check_empty(rest)
+        inner_sig_type, sig_rest = _get_sshstr(signature_raw)
+        # RSA certs can have multiple algorithm types
+        if (
+            sig_type == _SSH_RSA
+            and inner_sig_type
+            not in [_SSH_RSA_SHA256, _SSH_RSA_SHA512, _SSH_RSA]
+        ) or (sig_type != _SSH_RSA and inner_sig_type != sig_type):
+            raise ValueError("Signature key type does not match")
+        signature, sig_rest = _get_sshstr(sig_rest)
+        _check_empty(sig_rest)
+        return SSHCertificate(
+            nonce,
+            public_key,
+            serial,
+            cctype,
+            key_id,
+            valid_principals,
+            valid_after,
+            valid_before,
+            critical_options,
+            extensions,
+            sig_type,
+            sig_key,
+            inner_sig_type,
+            signature,
+            tbs_cert_body,
+            orig_key_type,
+            cert_body,
+        )
+    else:
+        _check_empty(rest)
+        return public_key
+
+
+def load_ssh_public_identity(
+    data: utils.Buffer,
+) -> SSHCertificate | SSHPublicKeyTypes:
+    return _load_ssh_public_identity(data)
+
+
+def _parse_exts_opts(exts_opts: memoryview) -> dict[bytes, bytes]:
+    result: dict[bytes, bytes] = {}
+    last_name = None
+    while exts_opts:
+        name, exts_opts = _get_sshstr(exts_opts)
+        bname: bytes = bytes(name)
+        if bname in result:
+            raise ValueError("Duplicate name")
+        if last_name is not None and bname < last_name:
+            raise ValueError("Fields not lexically sorted")
+        value, exts_opts = _get_sshstr(exts_opts)
+        if len(value) > 0:
+            value, extra = _get_sshstr(value)
+            if len(extra) > 0:
+                raise ValueError("Unexpected extra data after value")
+        result[bname] = bytes(value)
+        last_name = bname
+    return result
+
+
+def ssh_key_fingerprint(
+    key: SSHPublicKeyTypes,
+    hash_algorithm: hashes.MD5 | hashes.SHA1 | hashes.SHA256,
+) -> bytes:
+    if not isinstance(
+        hash_algorithm,
+        (hashes.MD5, hashes.SHA1, hashes.SHA256),
+    ):
+        raise TypeError("hash_algorithm must be either MD5, SHA1, or SHA256")
+
+    key_type = _get_ssh_key_type(key)
+    kformat = _lookup_kformat(key_type)
+
+    f_pub = _FragList()
+    f_pub.put_sshstr(key_type)
+    kformat.encode_public(key, f_pub)
+
+    ssh_binary_data = f_pub.tobytes()
+
+    # Hash the binary data
+    hash_obj = hashes.Hash(hash_algorithm)
+    hash_obj.update(ssh_binary_data)
+    return hash_obj.finalize()
+
+
+def load_ssh_public_key(
+    data: utils.Buffer, backend: typing.Any = None
+) -> SSHPublicKeyTypes:
+    cert_or_key = _load_ssh_public_identity(data, _legacy_dsa_allowed=True)
+    public_key: SSHPublicKeyTypes
+    if isinstance(cert_or_key, SSHCertificate):
+        public_key = cert_or_key.public_key()
+    else:
+        public_key = cert_or_key
+
+    if isinstance(public_key, dsa.DSAPublicKey):
+        warnings.warn(
+            "SSH DSA keys are deprecated and will be removed in a future "
+            "release.",
+            utils.DeprecatedIn40,
+            stacklevel=2,
+        )
+    return public_key
+
+
+def serialize_ssh_public_key(public_key: SSHPublicKeyTypes) -> bytes:
+    """One-line public key format for OpenSSH"""
+    if isinstance(public_key, dsa.DSAPublicKey):
+        warnings.warn(
+            "SSH DSA key support is deprecated and will be "
+            "removed in a future release",
+            utils.DeprecatedIn40,
+            stacklevel=4,
+        )
+    key_type = _get_ssh_key_type(public_key)
+    kformat = _lookup_kformat(key_type)
+
+    f_pub = _FragList()
+    f_pub.put_sshstr(key_type)
+    kformat.encode_public(public_key, f_pub)
+
+    pub = binascii.b2a_base64(f_pub.tobytes()).strip()
+    return b"".join([key_type, b" ", pub])
+
+
+SSHCertPrivateKeyTypes = typing.Union[
+    ec.EllipticCurvePrivateKey,
+    rsa.RSAPrivateKey,
+    ed25519.Ed25519PrivateKey,
+]
+
+
+# This is an undocumented limit enforced in the openssh codebase for sshd and
+# ssh-keygen, but it is undefined in the ssh certificates spec.
+_SSHKEY_CERT_MAX_PRINCIPALS = 256
+
+
+class SSHCertificateBuilder:
+    def __init__(
+        self,
+        _public_key: SSHCertPublicKeyTypes | None = None,
+        _serial: int | None = None,
+        _type: SSHCertificateType | None = None,
+        _key_id: bytes | None = None,
+        _valid_principals: list[bytes] = [],
+        _valid_for_all_principals: bool = False,
+        _valid_before: int | None = None,
+        _valid_after: int | None = None,
+        _critical_options: list[tuple[bytes, bytes]] = [],
+        _extensions: list[tuple[bytes, bytes]] = [],
+    ):
+        self._public_key = _public_key
+        self._serial = _serial
+        self._type = _type
+        self._key_id = _key_id
+        self._valid_principals = _valid_principals
+        self._valid_for_all_principals = _valid_for_all_principals
+        self._valid_before = _valid_before
+        self._valid_after = _valid_after
+        self._critical_options = _critical_options
+        self._extensions = _extensions
+
+    def public_key(
+        self, public_key: SSHCertPublicKeyTypes
+    ) -> SSHCertificateBuilder:
+        if not isinstance(
+            public_key,
+            (
+                ec.EllipticCurvePublicKey,
+                rsa.RSAPublicKey,
+                ed25519.Ed25519PublicKey,
+            ),
+        ):
+            raise TypeError("Unsupported key type")
+        if self._public_key is not None:
+            raise ValueError("public_key already set")
+
+        return SSHCertificateBuilder(
+            _public_key=public_key,
+            _serial=self._serial,
+            _type=self._type,
+            _key_id=self._key_id,
+            _valid_principals=self._valid_principals,
+            _valid_for_all_principals=self._valid_for_all_principals,
+            _valid_before=self._valid_before,
+            _valid_after=self._valid_after,
+            _critical_options=self._critical_options,
+            _extensions=self._extensions,
+        )
+
+    def serial(self, serial: int) -> SSHCertificateBuilder:
+        if not isinstance(serial, int):
+            raise TypeError("serial must be an integer")
+        if not 0 <= serial < 2**64:
+            raise ValueError("serial must be between 0 and 2**64")
+        if self._serial is not None:
+            raise ValueError("serial already set")
+
+        return SSHCertificateBuilder(
+            _public_key=self._public_key,
+            _serial=serial,
+            _type=self._type,
+            _key_id=self._key_id,
+            _valid_principals=self._valid_principals,
+            _valid_for_all_principals=self._valid_for_all_principals,
+            _valid_before=self._valid_before,
+            _valid_after=self._valid_after,
+            _critical_options=self._critical_options,
+            _extensions=self._extensions,
+        )
+
+    def type(self, type: SSHCertificateType) -> SSHCertificateBuilder:
+        if not isinstance(type, SSHCertificateType):
+            raise TypeError("type must be an SSHCertificateType")
+        if self._type is not None:
+            raise ValueError("type already set")
+
+        return SSHCertificateBuilder(
+            _public_key=self._public_key,
+            _serial=self._serial,
+            _type=type,
+            _key_id=self._key_id,
+            _valid_principals=self._valid_principals,
+            _valid_for_all_principals=self._valid_for_all_principals,
+            _valid_before=self._valid_before,
+            _valid_after=self._valid_after,
+            _critical_options=self._critical_options,
+            _extensions=self._extensions,
+        )
+
+    def key_id(self, key_id: bytes) -> SSHCertificateBuilder:
+        if not isinstance(key_id, bytes):
+            raise TypeError("key_id must be bytes")
+        if self._key_id is not None:
+            raise ValueError("key_id already set")
+
+        return SSHCertificateBuilder(
+            _public_key=self._public_key,
+            _serial=self._serial,
+            _type=self._type,
+            _key_id=key_id,
+            _valid_principals=self._valid_principals,
+            _valid_for_all_principals=self._valid_for_all_principals,
+            _valid_before=self._valid_before,
+            _valid_after=self._valid_after,
+            _critical_options=self._critical_options,
+            _extensions=self._extensions,
+        )
+
+    def valid_principals(
+        self, valid_principals: list[bytes]
+    ) -> SSHCertificateBuilder:
+        if self._valid_for_all_principals:
+            raise ValueError(
+                "Principals can't be set because the cert is valid "
+                "for all principals"
+            )
+        if (
+            not all(isinstance(x, bytes) for x in valid_principals)
+            or not valid_principals
+        ):
+            raise TypeError(
+                "principals must be a list of bytes and can't be empty"
+            )
+        if self._valid_principals:
+            raise ValueError("valid_principals already set")
+
+        if len(valid_principals) > _SSHKEY_CERT_MAX_PRINCIPALS:
+            raise ValueError(
+                "Reached or exceeded the maximum number of valid_principals"
+            )
+
+        return SSHCertificateBuilder(
+            _public_key=self._public_key,
+            _serial=self._serial,
+            _type=self._type,
+            _key_id=self._key_id,
+            _valid_principals=valid_principals,
+            _valid_for_all_principals=self._valid_for_all_principals,
+            _valid_before=self._valid_before,
+            _valid_after=self._valid_after,
+            _critical_options=self._critical_options,
+            _extensions=self._extensions,
+        )
+
+    def valid_for_all_principals(self):
+        if self._valid_principals:
+            raise ValueError(
+                "valid_principals already set, can't set "
+                "valid_for_all_principals"
+            )
+        if self._valid_for_all_principals:
+            raise ValueError("valid_for_all_principals already set")
+
+        return SSHCertificateBuilder(
+            _public_key=self._public_key,
+            _serial=self._serial,
+            _type=self._type,
+            _key_id=self._key_id,
+            _valid_principals=self._valid_principals,
+            _valid_for_all_principals=True,
+            _valid_before=self._valid_before,
+            _valid_after=self._valid_after,
+            _critical_options=self._critical_options,
+            _extensions=self._extensions,
+        )
+
+    def valid_before(self, valid_before: int | float) -> SSHCertificateBuilder:
+        if not isinstance(valid_before, (int, float)):
+            raise TypeError("valid_before must be an int or float")
+        valid_before = int(valid_before)
+        if valid_before < 0 or valid_before >= 2**64:
+            raise ValueError("valid_before must [0, 2**64)")
+        if self._valid_before is not None:
+            raise ValueError("valid_before already set")
+
+        return SSHCertificateBuilder(
+            _public_key=self._public_key,
+            _serial=self._serial,
+            _type=self._type,
+            _key_id=self._key_id,
+            _valid_principals=self._valid_principals,
+            _valid_for_all_principals=self._valid_for_all_principals,
+            _valid_before=valid_before,
+            _valid_after=self._valid_after,
+            _critical_options=self._critical_options,
+            _extensions=self._extensions,
+        )
+
+    def valid_after(self, valid_after: int | float) -> SSHCertificateBuilder:
+        if not isinstance(valid_after, (int, float)):
+            raise TypeError("valid_after must be an int or float")
+        valid_after = int(valid_after)
+        if valid_after < 0 or valid_after >= 2**64:
+            raise ValueError("valid_after must [0, 2**64)")
+        if self._valid_after is not None:
+            raise ValueError("valid_after already set")
+
+        return SSHCertificateBuilder(
+            _public_key=self._public_key,
+            _serial=self._serial,
+            _type=self._type,
+            _key_id=self._key_id,
+            _valid_principals=self._valid_principals,
+            _valid_for_all_principals=self._valid_for_all_principals,
+            _valid_before=self._valid_before,
+            _valid_after=valid_after,
+            _critical_options=self._critical_options,
+            _extensions=self._extensions,
+        )
+
+    def add_critical_option(
+        self, name: bytes, value: bytes
+    ) -> SSHCertificateBuilder:
+        if not isinstance(name, bytes) or not isinstance(value, bytes):
+            raise TypeError("name and value must be bytes")
+        # This is O(n**2)
+        if name in [name for name, _ in self._critical_options]:
+            raise ValueError("Duplicate critical option name")
+
+        return SSHCertificateBuilder(
+            _public_key=self._public_key,
+            _serial=self._serial,
+            _type=self._type,
+            _key_id=self._key_id,
+            _valid_principals=self._valid_principals,
+            _valid_for_all_principals=self._valid_for_all_principals,
+            _valid_before=self._valid_before,
+            _valid_after=self._valid_after,
+            _critical_options=[*self._critical_options, (name, value)],
+            _extensions=self._extensions,
+        )
+
+    def add_extension(
+        self, name: bytes, value: bytes
+    ) -> SSHCertificateBuilder:
+        if not isinstance(name, bytes) or not isinstance(value, bytes):
+            raise TypeError("name and value must be bytes")
+        # This is O(n**2)
+        if name in [name for name, _ in self._extensions]:
+            raise ValueError("Duplicate extension name")
+
+        return SSHCertificateBuilder(
+            _public_key=self._public_key,
+            _serial=self._serial,
+            _type=self._type,
+            _key_id=self._key_id,
+            _valid_principals=self._valid_principals,
+            _valid_for_all_principals=self._valid_for_all_principals,
+            _valid_before=self._valid_before,
+            _valid_after=self._valid_after,
+            _critical_options=self._critical_options,
+            _extensions=[*self._extensions, (name, value)],
+        )
+
+    def sign(self, private_key: SSHCertPrivateKeyTypes) -> SSHCertificate:
+        if not isinstance(
+            private_key,
+            (
+                ec.EllipticCurvePrivateKey,
+                rsa.RSAPrivateKey,
+                ed25519.Ed25519PrivateKey,
+            ),
+        ):
+            raise TypeError("Unsupported private key type")
+
+        if self._public_key is None:
+            raise ValueError("public_key must be set")
+
+        # Not required
+        serial = 0 if self._serial is None else self._serial
+
+        if self._type is None:
+            raise ValueError("type must be set")
+
+        # Not required
+        key_id = b"" if self._key_id is None else self._key_id
+
+        # A zero length list is valid, but means the certificate
+        # is valid for any principal of the specified type. We require
+        # the user to explicitly set valid_for_all_principals to get
+        # that behavior.
+        if not self._valid_principals and not self._valid_for_all_principals:
+            raise ValueError(
+                "valid_principals must be set if valid_for_all_principals "
+                "is False"
+            )
+
+        if self._valid_before is None:
+            raise ValueError("valid_before must be set")
+
+        if self._valid_after is None:
+            raise ValueError("valid_after must be set")
+
+        if self._valid_after > self._valid_before:
+            raise ValueError("valid_after must be earlier than valid_before")
+
+        # lexically sort our byte strings
+        self._critical_options.sort(key=lambda x: x[0])
+        self._extensions.sort(key=lambda x: x[0])
+
+        key_type = _get_ssh_key_type(self._public_key)
+        cert_prefix = key_type + _CERT_SUFFIX
+
+        # Marshal the bytes to be signed
+        nonce = os.urandom(32)
+        kformat = _lookup_kformat(key_type)
+        f = _FragList()
+        f.put_sshstr(cert_prefix)
+        f.put_sshstr(nonce)
+        kformat.encode_public(self._public_key, f)
+        f.put_u64(serial)
+        f.put_u32(self._type.value)
+        f.put_sshstr(key_id)
+        fprincipals = _FragList()
+        for p in self._valid_principals:
+            fprincipals.put_sshstr(p)
+        f.put_sshstr(fprincipals.tobytes())
+        f.put_u64(self._valid_after)
+        f.put_u64(self._valid_before)
+        fcrit = _FragList()
+        for name, value in self._critical_options:
+            fcrit.put_sshstr(name)
+            if len(value) > 0:
+                foptval = _FragList()
+                foptval.put_sshstr(value)
+                fcrit.put_sshstr(foptval.tobytes())
+            else:
+                fcrit.put_sshstr(value)
+        f.put_sshstr(fcrit.tobytes())
+        fext = _FragList()
+        for name, value in self._extensions:
+            fext.put_sshstr(name)
+            if len(value) > 0:
+                fextval = _FragList()
+                fextval.put_sshstr(value)
+                fext.put_sshstr(fextval.tobytes())
+            else:
+                fext.put_sshstr(value)
+        f.put_sshstr(fext.tobytes())
+        f.put_sshstr(b"")  # RESERVED FIELD
+        # encode CA public key
+        ca_type = _get_ssh_key_type(private_key)
+        caformat = _lookup_kformat(ca_type)
+        caf = _FragList()
+        caf.put_sshstr(ca_type)
+        caformat.encode_public(private_key.public_key(), caf)
+        f.put_sshstr(caf.tobytes())
+        # Sigs according to the rules defined for the CA's public key
+        # (RFC4253 section 6.6 for ssh-rsa, RFC5656 for ECDSA,
+        # and RFC8032 for Ed25519).
+        if isinstance(private_key, ed25519.Ed25519PrivateKey):
+            signature = private_key.sign(f.tobytes())
+            fsig = _FragList()
+            fsig.put_sshstr(ca_type)
+            fsig.put_sshstr(signature)
+            f.put_sshstr(fsig.tobytes())
+        elif isinstance(private_key, ec.EllipticCurvePrivateKey):
+            hash_alg = _get_ec_hash_alg(private_key.curve)
+            signature = private_key.sign(f.tobytes(), ec.ECDSA(hash_alg))
+            r, s = asym_utils.decode_dss_signature(signature)
+            fsig = _FragList()
+            fsig.put_sshstr(ca_type)
+            fsigblob = _FragList()
+            fsigblob.put_mpint(r)
+            fsigblob.put_mpint(s)
+            fsig.put_sshstr(fsigblob.tobytes())
+            f.put_sshstr(fsig.tobytes())
+
+        else:
+            assert isinstance(private_key, rsa.RSAPrivateKey)
+            # Just like Golang, we're going to use SHA512 for RSA
+            # https://cs.opensource.google/go/x/crypto/+/refs/tags/
+            # v0.4.0:ssh/certs.go;l=445
+            # RFC 8332 defines SHA256 and 512 as options
+            fsig = _FragList()
+            fsig.put_sshstr(_SSH_RSA_SHA512)
+            signature = private_key.sign(
+                f.tobytes(), padding.PKCS1v15(), hashes.SHA512()
+            )
+            fsig.put_sshstr(signature)
+            f.put_sshstr(fsig.tobytes())
+
+        cert_data = binascii.b2a_base64(f.tobytes()).strip()
+        # load_ssh_public_identity returns a union, but this is
+        # guaranteed to be an SSHCertificate, so we cast to make
+        # mypy happy.
+        return typing.cast(
+            SSHCertificate,
+            load_ssh_public_identity(b"".join([cert_prefix, b" ", cert_data])),
+        )

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/twofactor/__init__.py

@@ -0,0 +1,9 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+
+class InvalidToken(Exception):
+    pass

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/twofactor/hotp.py

@@ -0,0 +1,101 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import base64
+import typing
+from urllib.parse import quote, urlencode
+
+from cryptography.hazmat.primitives import constant_time, hmac
+from cryptography.hazmat.primitives.hashes import SHA1, SHA256, SHA512
+from cryptography.hazmat.primitives.twofactor import InvalidToken
+from cryptography.utils import Buffer
+
+HOTPHashTypes = typing.Union[SHA1, SHA256, SHA512]
+
+
+def _generate_uri(
+    hotp: HOTP,
+    type_name: str,
+    account_name: str,
+    issuer: str | None,
+    extra_parameters: list[tuple[str, int]],
+) -> str:
+    parameters = [
+        ("digits", hotp._length),
+        ("secret", base64.b32encode(hotp._key)),
+        ("algorithm", hotp._algorithm.name.upper()),
+    ]
+
+    if issuer is not None:
+        parameters.append(("issuer", issuer))
+
+    parameters.extend(extra_parameters)
+
+    label = (
+        f"{quote(issuer)}:{quote(account_name)}"
+        if issuer
+        else quote(account_name)
+    )
+    return f"otpauth://{type_name}/{label}?{urlencode(parameters)}"
+
+
+class HOTP:
+    def __init__(
+        self,
+        key: Buffer,
+        length: int,
+        algorithm: HOTPHashTypes,
+        backend: typing.Any = None,
+        enforce_key_length: bool = True,
+    ) -> None:
+        if len(key) < 16 and enforce_key_length is True:
+            raise ValueError("Key length has to be at least 128 bits.")
+
+        if not isinstance(length, int):
+            raise TypeError("Length parameter must be an integer type.")
+
+        if length < 6 or length > 8:
+            raise ValueError("Length of HOTP has to be between 6 and 8.")
+
+        if not isinstance(algorithm, (SHA1, SHA256, SHA512)):
+            raise TypeError("Algorithm must be SHA1, SHA256 or SHA512.")
+
+        self._key = key
+        self._length = length
+        self._algorithm = algorithm
+
+    def generate(self, counter: int) -> bytes:
+        if not isinstance(counter, int):
+            raise TypeError("Counter parameter must be an integer type.")
+
+        truncated_value = self._dynamic_truncate(counter)
+        hotp = truncated_value % (10**self._length)
+        return "{0:0{1}}".format(hotp, self._length).encode()
+
+    def verify(self, hotp: bytes, counter: int) -> None:
+        if not constant_time.bytes_eq(self.generate(counter), hotp):
+            raise InvalidToken("Supplied HOTP value does not match.")
+
+    def _dynamic_truncate(self, counter: int) -> int:
+        ctx = hmac.HMAC(self._key, self._algorithm)
+
+        try:
+            ctx.update(counter.to_bytes(length=8, byteorder="big"))
+        except OverflowError:
+            raise ValueError(f"Counter must be between 0 and {2**64 - 1}.")
+
+        hmac_value = ctx.finalize()
+
+        offset = hmac_value[len(hmac_value) - 1] & 0b1111
+        p = hmac_value[offset : offset + 4]
+        return int.from_bytes(p, byteorder="big") & 0x7FFFFFFF
+
+    def get_provisioning_uri(
+        self, account_name: str, counter: int, issuer: str | None
+    ) -> str:
+        return _generate_uri(
+            self, "hotp", account_name, issuer, [("counter", int(counter))]
+        )

.mcp-venv/lib/python3.13/site-packages/cryptography/hazmat/primitives/twofactor/totp.py

@@ -0,0 +1,56 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import typing
+
+from cryptography.hazmat.primitives import constant_time
+from cryptography.hazmat.primitives.twofactor import InvalidToken
+from cryptography.hazmat.primitives.twofactor.hotp import (
+    HOTP,
+    HOTPHashTypes,
+    _generate_uri,
+)
+from cryptography.utils import Buffer
+
+
+class TOTP:
+    def __init__(
+        self,
+        key: Buffer,
+        length: int,
+        algorithm: HOTPHashTypes,
+        time_step: int,
+        backend: typing.Any = None,
+        enforce_key_length: bool = True,
+    ):
+        self._time_step = time_step
+        self._hotp = HOTP(
+            key, length, algorithm, enforce_key_length=enforce_key_length
+        )
+
+    def generate(self, time: int | float) -> bytes:
+        if not isinstance(time, (int, float)):
+            raise TypeError(
+                "Time parameter must be an integer type or float type."
+            )
+
+        counter = int(time / self._time_step)
+        return self._hotp.generate(counter)
+
+    def verify(self, totp: bytes, time: int) -> None:
+        if not constant_time.bytes_eq(self.generate(time), totp):
+            raise InvalidToken("Supplied TOTP value does not match.")
+
+    def get_provisioning_uri(
+        self, account_name: str, issuer: str | None
+    ) -> str:
+        return _generate_uri(
+            self._hotp,
+            "totp",
+            account_name,
+            issuer,
+            [("period", int(self._time_step))],
+        )

.mcp-venv/lib/python3.13/site-packages/cryptography/utils.py

@@ -0,0 +1,136 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import enum
+import sys
+import types
+import typing
+import warnings
+from collections.abc import Sequence
+
+
+# We use a UserWarning subclass, instead of DeprecationWarning, because CPython
+# decided deprecation warnings should be invisible by default.
+class CryptographyDeprecationWarning(UserWarning):
+    pass
+
+
+# Several APIs were deprecated with no specific end-of-life date because of the
+# ubiquity of their use. They should not be removed until we agree on when that
+# cycle ends.
+DeprecatedIn36 = CryptographyDeprecationWarning
+DeprecatedIn40 = CryptographyDeprecationWarning
+DeprecatedIn41 = CryptographyDeprecationWarning
+DeprecatedIn42 = CryptographyDeprecationWarning
+DeprecatedIn43 = CryptographyDeprecationWarning
+DeprecatedIn47 = CryptographyDeprecationWarning
+DeprecatedIn50 = CryptographyDeprecationWarning
+
+
+# If you're wondering why we don't use `Buffer`, it's because `Buffer` would
+# be more accurately named: Bufferable. It means something which has an
+# `__buffer__`. Which means you can't actually treat the result as a buffer
+# (and do things like take a `len()`).
+Buffer = typing.Union[bytes, bytearray, memoryview]
+
+
+def _check_bytes(name: str, value: bytes) -> None:
+    if not isinstance(value, bytes):
+        raise TypeError(f"{name} must be bytes")
+
+
+def _check_byteslike(name: str, value: Buffer) -> None:
+    if isinstance(value, (bytes, bytearray, memoryview)):
+        return
+    try:
+        memoryview(value)
+    except TypeError:
+        raise TypeError(f"{name} must be bytes-like")
+
+
+def int_to_bytes(integer: int, length: int | None = None) -> bytes:
+    if length == 0:
+        raise ValueError("length argument can't be 0")
+    return integer.to_bytes(
+        length or (integer.bit_length() + 7) // 8 or 1, "big"
+    )
+
+
+class InterfaceNotImplemented(Exception):
+    pass
+
+
+class _DeprecatedValue:
+    def __init__(self, value: object, message: str, warning_class):
+        self.value = value
+        self.message = message
+        self.warning_class = warning_class
+
+
+class _ModuleWithDeprecations(types.ModuleType):
+    def __init__(self, module: types.ModuleType):
+        super().__init__(module.__name__)
+        self.__dict__["_module"] = module
+
+    def __getattr__(self, name: str) -> typing.Any:
+        obj = getattr(self._module, name)
+        if isinstance(obj, _DeprecatedValue):
+            warnings.warn(obj.message, obj.warning_class, stacklevel=2)
+            obj = obj.value
+        else:
+            # Cache non-deprecated attributes in our own `__dict__` so that
+            # subsequent lookups are ordinary module attribute accesses and
+            # don't pay for this `__getattr__` (which would otherwise defeat
+            # CPython's LOAD_ATTR module caching for every attribute of the
+            # module). `__setattr__` and `__delattr__` keep the cache
+            # coherent.
+            self.__dict__[name] = obj
+        return obj
+
+    def __setattr__(self, attr: str, value: object) -> None:
+        if isinstance(value, _DeprecatedValue):
+            self.__dict__.pop(attr, None)
+        else:
+            self.__dict__[attr] = value
+        setattr(self._module, attr, value)
+
+    def __delattr__(self, attr: str) -> None:
+        obj = getattr(self._module, attr)
+        if isinstance(obj, _DeprecatedValue):
+            warnings.warn(obj.message, obj.warning_class, stacklevel=2)
+
+        self.__dict__.pop(attr, None)
+        delattr(self._module, attr)
+
+    def __dir__(self) -> Sequence[str]:
+        return ["_module", *dir(self._module)]
+
+
+def deprecated(
+    value: object,
+    module_name: str,
+    message: str,
+    warning_class: type[Warning],
+    name: str | None = None,
+) -> _DeprecatedValue:
+    module = sys.modules[module_name]
+    if not isinstance(module, _ModuleWithDeprecations):
+        sys.modules[module_name] = module = _ModuleWithDeprecations(module)
+    dv = _DeprecatedValue(value, message, warning_class)
+    # Maintain backwards compatibility with `name is None` for pyOpenSSL.
+    if name is not None:
+        setattr(module, name, dv)
+    return dv
+
+
+# Python 3.10 changed representation of enums. We use well-defined object
+# representation and string representation from Python 3.9.
+class Enum(enum.Enum):
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__}.{self._name_}: {self._value_!r}>"
+
+    def __str__(self) -> str:
+        return f"{self.__class__.__name__}.{self._name_}"

.mcp-venv/lib/python3.13/site-packages/cryptography/x509/__init__.py

@@ -0,0 +1,270 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography.x509 import certificate_transparency, oid, verification
+from cryptography.x509.base import (
+    Attribute,
+    AttributeNotFound,
+    Attributes,
+    Certificate,
+    CertificateBuilder,
+    CertificateRevocationList,
+    CertificateRevocationListBuilder,
+    CertificateSigningRequest,
+    CertificateSigningRequestBuilder,
+    InvalidVersion,
+    RevokedCertificate,
+    RevokedCertificateBuilder,
+    Version,
+    load_der_x509_certificate,
+    load_der_x509_crl,
+    load_der_x509_csr,
+    load_pem_x509_certificate,
+    load_pem_x509_certificates,
+    load_pem_x509_crl,
+    load_pem_x509_csr,
+    random_serial_number,
+)
+from cryptography.x509.extensions import (
+    AccessDescription,
+    Admission,
+    Admissions,
+    AuthorityInformationAccess,
+    AuthorityKeyIdentifier,
+    BasicConstraints,
+    CertificateIssuer,
+    CertificatePolicies,
+    CRLDistributionPoints,
+    CRLNumber,
+    CRLReason,
+    DeltaCRLIndicator,
+    DistributionPoint,
+    DuplicateExtension,
+    ExtendedKeyUsage,
+    Extension,
+    ExtensionNotFound,
+    Extensions,
+    ExtensionType,
+    FreshestCRL,
+    GeneralNames,
+    InhibitAnyPolicy,
+    InvalidityDate,
+    IssuerAlternativeName,
+    IssuingDistributionPoint,
+    KeyUsage,
+    MSCertificateTemplate,
+    NameConstraints,
+    NamingAuthority,
+    NoticeReference,
+    OCSPAcceptableResponses,
+    OCSPNoCheck,
+    OCSPNonce,
+    PolicyConstraints,
+    PolicyInformation,
+    PrecertificateSignedCertificateTimestamps,
+    PrecertPoison,
+    PrivateKeyUsagePeriod,
+    ProfessionInfo,
+    ReasonFlags,
+    SignedCertificateTimestamps,
+    SubjectAlternativeName,
+    SubjectInformationAccess,
+    SubjectKeyIdentifier,
+    TLSFeature,
+    TLSFeatureType,
+    UnrecognizedExtension,
+    UserNotice,
+)
+from cryptography.x509.general_name import (
+    DirectoryName,
+    DNSName,
+    GeneralName,
+    IPAddress,
+    OtherName,
+    RegisteredID,
+    RFC822Name,
+    UniformResourceIdentifier,
+    UnsupportedGeneralNameType,
+)
+from cryptography.x509.name import (
+    Name,
+    NameAttribute,
+    RelativeDistinguishedName,
+)
+from cryptography.x509.oid import (
+    AuthorityInformationAccessOID,
+    CertificatePoliciesOID,
+    CRLEntryExtensionOID,
+    ExtendedKeyUsageOID,
+    ExtensionOID,
+    NameOID,
+    ObjectIdentifier,
+    PublicKeyAlgorithmOID,
+    SignatureAlgorithmOID,
+)
+
+OID_AUTHORITY_INFORMATION_ACCESS = ExtensionOID.AUTHORITY_INFORMATION_ACCESS
+OID_AUTHORITY_KEY_IDENTIFIER = ExtensionOID.AUTHORITY_KEY_IDENTIFIER
+OID_BASIC_CONSTRAINTS = ExtensionOID.BASIC_CONSTRAINTS
+OID_CERTIFICATE_POLICIES = ExtensionOID.CERTIFICATE_POLICIES
+OID_CRL_DISTRIBUTION_POINTS = ExtensionOID.CRL_DISTRIBUTION_POINTS
+OID_EXTENDED_KEY_USAGE = ExtensionOID.EXTENDED_KEY_USAGE
+OID_FRESHEST_CRL = ExtensionOID.FRESHEST_CRL
+OID_INHIBIT_ANY_POLICY = ExtensionOID.INHIBIT_ANY_POLICY
+OID_ISSUER_ALTERNATIVE_NAME = ExtensionOID.ISSUER_ALTERNATIVE_NAME
+OID_KEY_USAGE = ExtensionOID.KEY_USAGE
+OID_PRIVATE_KEY_USAGE_PERIOD = ExtensionOID.PRIVATE_KEY_USAGE_PERIOD
+OID_NAME_CONSTRAINTS = ExtensionOID.NAME_CONSTRAINTS
+OID_OCSP_NO_CHECK = ExtensionOID.OCSP_NO_CHECK
+OID_POLICY_CONSTRAINTS = ExtensionOID.POLICY_CONSTRAINTS
+OID_POLICY_MAPPINGS = ExtensionOID.POLICY_MAPPINGS
+OID_SUBJECT_ALTERNATIVE_NAME = ExtensionOID.SUBJECT_ALTERNATIVE_NAME
+OID_SUBJECT_DIRECTORY_ATTRIBUTES = ExtensionOID.SUBJECT_DIRECTORY_ATTRIBUTES
+OID_SUBJECT_INFORMATION_ACCESS = ExtensionOID.SUBJECT_INFORMATION_ACCESS
+OID_SUBJECT_KEY_IDENTIFIER = ExtensionOID.SUBJECT_KEY_IDENTIFIER
+
+OID_DSA_WITH_SHA1 = SignatureAlgorithmOID.DSA_WITH_SHA1
+OID_DSA_WITH_SHA224 = SignatureAlgorithmOID.DSA_WITH_SHA224
+OID_DSA_WITH_SHA256 = SignatureAlgorithmOID.DSA_WITH_SHA256
+OID_ECDSA_WITH_SHA1 = SignatureAlgorithmOID.ECDSA_WITH_SHA1
+OID_ECDSA_WITH_SHA224 = SignatureAlgorithmOID.ECDSA_WITH_SHA224
+OID_ECDSA_WITH_SHA256 = SignatureAlgorithmOID.ECDSA_WITH_SHA256
+OID_ECDSA_WITH_SHA384 = SignatureAlgorithmOID.ECDSA_WITH_SHA384
+OID_ECDSA_WITH_SHA512 = SignatureAlgorithmOID.ECDSA_WITH_SHA512
+OID_RSA_WITH_MD5 = SignatureAlgorithmOID.RSA_WITH_MD5
+OID_RSA_WITH_SHA1 = SignatureAlgorithmOID.RSA_WITH_SHA1
+OID_RSA_WITH_SHA224 = SignatureAlgorithmOID.RSA_WITH_SHA224
+OID_RSA_WITH_SHA256 = SignatureAlgorithmOID.RSA_WITH_SHA256
+OID_RSA_WITH_SHA384 = SignatureAlgorithmOID.RSA_WITH_SHA384
+OID_RSA_WITH_SHA512 = SignatureAlgorithmOID.RSA_WITH_SHA512
+OID_RSASSA_PSS = SignatureAlgorithmOID.RSASSA_PSS
+
+OID_COMMON_NAME = NameOID.COMMON_NAME
+OID_COUNTRY_NAME = NameOID.COUNTRY_NAME
+OID_DOMAIN_COMPONENT = NameOID.DOMAIN_COMPONENT
+OID_DN_QUALIFIER = NameOID.DN_QUALIFIER
+OID_EMAIL_ADDRESS = NameOID.EMAIL_ADDRESS
+OID_GENERATION_QUALIFIER = NameOID.GENERATION_QUALIFIER
+OID_GIVEN_NAME = NameOID.GIVEN_NAME
+OID_LOCALITY_NAME = NameOID.LOCALITY_NAME
+OID_ORGANIZATIONAL_UNIT_NAME = NameOID.ORGANIZATIONAL_UNIT_NAME
+OID_ORGANIZATION_NAME = NameOID.ORGANIZATION_NAME
+OID_PSEUDONYM = NameOID.PSEUDONYM
+OID_SERIAL_NUMBER = NameOID.SERIAL_NUMBER
+OID_STATE_OR_PROVINCE_NAME = NameOID.STATE_OR_PROVINCE_NAME
+OID_SURNAME = NameOID.SURNAME
+OID_TITLE = NameOID.TITLE
+
+OID_CLIENT_AUTH = ExtendedKeyUsageOID.CLIENT_AUTH
+OID_CODE_SIGNING = ExtendedKeyUsageOID.CODE_SIGNING
+OID_EMAIL_PROTECTION = ExtendedKeyUsageOID.EMAIL_PROTECTION
+OID_OCSP_SIGNING = ExtendedKeyUsageOID.OCSP_SIGNING
+OID_SERVER_AUTH = ExtendedKeyUsageOID.SERVER_AUTH
+OID_TIME_STAMPING = ExtendedKeyUsageOID.TIME_STAMPING
+
+OID_ANY_POLICY = CertificatePoliciesOID.ANY_POLICY
+OID_CPS_QUALIFIER = CertificatePoliciesOID.CPS_QUALIFIER
+OID_CPS_USER_NOTICE = CertificatePoliciesOID.CPS_USER_NOTICE
+
+OID_CERTIFICATE_ISSUER = CRLEntryExtensionOID.CERTIFICATE_ISSUER
+OID_CRL_REASON = CRLEntryExtensionOID.CRL_REASON
+OID_INVALIDITY_DATE = CRLEntryExtensionOID.INVALIDITY_DATE
+
+OID_CA_ISSUERS = AuthorityInformationAccessOID.CA_ISSUERS
+OID_OCSP = AuthorityInformationAccessOID.OCSP
+
+__all__ = [
+    "OID_CA_ISSUERS",
+    "OID_OCSP",
+    "AccessDescription",
+    "Admission",
+    "Admissions",
+    "Attribute",
+    "AttributeNotFound",
+    "Attributes",
+    "AuthorityInformationAccess",
+    "AuthorityKeyIdentifier",
+    "BasicConstraints",
+    "CRLDistributionPoints",
+    "CRLNumber",
+    "CRLReason",
+    "Certificate",
+    "CertificateBuilder",
+    "CertificateIssuer",
+    "CertificatePolicies",
+    "CertificateRevocationList",
+    "CertificateRevocationListBuilder",
+    "CertificateSigningRequest",
+    "CertificateSigningRequestBuilder",
+    "DNSName",
+    "DeltaCRLIndicator",
+    "DirectoryName",
+    "DistributionPoint",
+    "DuplicateExtension",
+    "ExtendedKeyUsage",
+    "Extension",
+    "ExtensionNotFound",
+    "ExtensionType",
+    "Extensions",
+    "FreshestCRL",
+    "GeneralName",
+    "GeneralNames",
+    "IPAddress",
+    "InhibitAnyPolicy",
+    "InvalidVersion",
+    "InvalidityDate",
+    "IssuerAlternativeName",
+    "IssuingDistributionPoint",
+    "KeyUsage",
+    "MSCertificateTemplate",
+    "Name",
+    "NameAttribute",
+    "NameConstraints",
+    "NameOID",
+    "NamingAuthority",
+    "NoticeReference",
+    "OCSPAcceptableResponses",
+    "OCSPNoCheck",
+    "OCSPNonce",
+    "ObjectIdentifier",
+    "OtherName",
+    "PolicyConstraints",
+    "PolicyInformation",
+    "PrecertPoison",
+    "PrecertificateSignedCertificateTimestamps",
+    "PrivateKeyUsagePeriod",
+    "ProfessionInfo",
+    "PublicKeyAlgorithmOID",
+    "RFC822Name",
+    "ReasonFlags",
+    "RegisteredID",
+    "RelativeDistinguishedName",
+    "RevokedCertificate",
+    "RevokedCertificateBuilder",
+    "SignatureAlgorithmOID",
+    "SignedCertificateTimestamps",
+    "SubjectAlternativeName",
+    "SubjectInformationAccess",
+    "SubjectKeyIdentifier",
+    "TLSFeature",
+    "TLSFeatureType",
+    "UniformResourceIdentifier",
+    "UnrecognizedExtension",
+    "UnsupportedGeneralNameType",
+    "UserNotice",
+    "Version",
+    "certificate_transparency",
+    "load_der_x509_certificate",
+    "load_der_x509_crl",
+    "load_der_x509_csr",
+    "load_pem_x509_certificate",
+    "load_pem_x509_certificates",
+    "load_pem_x509_crl",
+    "load_pem_x509_csr",
+    "oid",
+    "random_serial_number",
+    "verification",
+]

.mcp-venv/lib/python3.13/site-packages/cryptography/x509/base.py

@@ -0,0 +1,834 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import datetime
+import os
+import typing
+from collections.abc import Iterable
+
+from cryptography import utils
+from cryptography.hazmat.bindings._rust import x509 as rust_x509
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.asymmetric import (
+    dsa,
+    ec,
+    ed448,
+    ed25519,
+    mldsa,
+    mlkem,
+    padding,
+    rsa,
+    x448,
+    x25519,
+)
+from cryptography.hazmat.primitives.asymmetric.types import (
+    CertificateIssuerPrivateKeyTypes,
+    CertificatePublicKeyTypes,
+)
+from cryptography.x509.extensions import (
+    Extension,
+    ExtensionType,
+    _make_sequence_methods,
+)
+from cryptography.x509.name import Name, _ASN1Type
+from cryptography.x509.oid import ObjectIdentifier
+
+_EARLIEST_UTC_TIME = datetime.datetime(1950, 1, 1)
+
+# This must be kept in sync with sign.rs's list of allowable types in
+# identify_hash_type
+_AllowedHashTypes = typing.Union[
+    hashes.SHA224,
+    hashes.SHA256,
+    hashes.SHA384,
+    hashes.SHA512,
+    hashes.SHA3_224,
+    hashes.SHA3_256,
+    hashes.SHA3_384,
+    hashes.SHA3_512,
+]
+
+
+class AttributeNotFound(Exception):
+    def __init__(self, msg: str, oid: ObjectIdentifier) -> None:
+        super().__init__(msg)
+        self.oid = oid
+
+
+def _reject_duplicate_extension(
+    extension: Extension[ExtensionType],
+    extensions: list[Extension[ExtensionType]],
+) -> None:
+    # This is quadratic in the number of extensions
+    for e in extensions:
+        if e.oid == extension.oid:
+            raise ValueError("This extension has already been set.")
+
+
+def _reject_duplicate_attribute(
+    oid: ObjectIdentifier,
+    attributes: list[tuple[ObjectIdentifier, bytes, int | None]],
+) -> None:
+    # This is quadratic in the number of attributes
+    for attr_oid, _, _ in attributes:
+        if attr_oid == oid:
+            raise ValueError("This attribute has already been set.")
+
+
+def _convert_to_naive_utc_time(time: datetime.datetime) -> datetime.datetime:
+    """Normalizes a datetime to a naive datetime in UTC.
+
+    time -- datetime to normalize. Assumed to be in UTC if not timezone
+            aware.
+    """
+    if time.tzinfo is not None:
+        offset = time.utcoffset()
+        offset = offset if offset else datetime.timedelta()
+        return time.replace(tzinfo=None) - offset
+    else:
+        return time
+
+
+class Attribute:
+    def __init__(
+        self,
+        oid: ObjectIdentifier,
+        value: bytes,
+        _type: int = _ASN1Type.UTF8String.value,
+    ) -> None:
+        self._oid = oid
+        self._value = value
+        self._type = _type
+
+    @property
+    def oid(self) -> ObjectIdentifier:
+        return self._oid
+
+    @property
+    def value(self) -> bytes:
+        return self._value
+
+    def __repr__(self) -> str:
+        return f"<Attribute(oid={self.oid}, value={self.value!r})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Attribute):
+            return NotImplemented
+
+        return (
+            self.oid == other.oid
+            and self.value == other.value
+            and self._type == other._type
+        )
+
+    def __hash__(self) -> int:
+        return hash((self.oid, self.value, self._type))
+
+
+class Attributes:
+    def __init__(
+        self,
+        attributes: Iterable[Attribute],
+    ) -> None:
+        self._attributes = list(attributes)
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods("_attributes")
+
+    def __repr__(self) -> str:
+        return f"<Attributes({self._attributes})>"
+
+    def get_attribute_for_oid(self, oid: ObjectIdentifier) -> Attribute:
+        for attr in self:
+            if attr.oid == oid:
+                return attr
+
+        raise AttributeNotFound(f"No {oid} attribute was found", oid)
+
+
+class Version(utils.Enum):
+    v1 = 0
+    v3 = 2
+
+
+class InvalidVersion(Exception):
+    def __init__(self, msg: str, parsed_version: int) -> None:
+        super().__init__(msg)
+        self.parsed_version = parsed_version
+
+
+Certificate = rust_x509.Certificate
+RevokedCertificate = rust_x509.RevokedCertificate
+
+
+CertificateRevocationList = rust_x509.CertificateRevocationList
+CertificateSigningRequest = rust_x509.CertificateSigningRequest
+
+
+load_pem_x509_certificate = rust_x509.load_pem_x509_certificate
+load_der_x509_certificate = rust_x509.load_der_x509_certificate
+
+load_pem_x509_certificates = rust_x509.load_pem_x509_certificates
+
+load_pem_x509_csr = rust_x509.load_pem_x509_csr
+load_der_x509_csr = rust_x509.load_der_x509_csr
+
+load_pem_x509_crl = rust_x509.load_pem_x509_crl
+load_der_x509_crl = rust_x509.load_der_x509_crl
+
+
+class CertificateSigningRequestBuilder:
+    def __init__(
+        self,
+        subject_name: Name | None = None,
+        extensions: list[Extension[ExtensionType]] = [],
+        attributes: list[tuple[ObjectIdentifier, bytes, int | None]] = [],
+    ):
+        """
+        Creates an empty X.509 certificate request (v1).
+        """
+        self._subject_name = subject_name
+        self._extensions = extensions
+        self._attributes = attributes
+
+    def subject_name(self, name: Name) -> CertificateSigningRequestBuilder:
+        """
+        Sets the certificate requestor's distinguished name.
+        """
+        if not isinstance(name, Name):
+            raise TypeError("Expecting x509.Name object.")
+        if self._subject_name is not None:
+            raise ValueError("The subject name may only be set once.")
+        return CertificateSigningRequestBuilder(
+            name, self._extensions, self._attributes
+        )
+
+    def add_extension(
+        self, extval: ExtensionType, critical: bool
+    ) -> CertificateSigningRequestBuilder:
+        """
+        Adds an X.509 extension to the certificate request.
+        """
+        if not isinstance(extval, ExtensionType):
+            raise TypeError("extension must be an ExtensionType")
+
+        extension = Extension(extval.oid, critical, extval)
+        _reject_duplicate_extension(extension, self._extensions)
+
+        return CertificateSigningRequestBuilder(
+            self._subject_name,
+            [*self._extensions, extension],
+            self._attributes,
+        )
+
+    def add_attribute(
+        self,
+        oid: ObjectIdentifier,
+        value: bytes,
+        *,
+        _tag: _ASN1Type | None = None,
+    ) -> CertificateSigningRequestBuilder:
+        """
+        Adds an X.509 attribute with an OID and associated value.
+        """
+        if not isinstance(oid, ObjectIdentifier):
+            raise TypeError("oid must be an ObjectIdentifier")
+
+        if not isinstance(value, bytes):
+            raise TypeError("value must be bytes")
+
+        if _tag is not None and not isinstance(_tag, _ASN1Type):
+            raise TypeError("tag must be _ASN1Type")
+
+        _reject_duplicate_attribute(oid, self._attributes)
+
+        if _tag is not None:
+            tag = _tag.value
+        else:
+            tag = None
+
+        return CertificateSigningRequestBuilder(
+            self._subject_name,
+            self._extensions,
+            [*self._attributes, (oid, value, tag)],
+        )
+
+    def sign(
+        self,
+        private_key: CertificateIssuerPrivateKeyTypes,
+        algorithm: _AllowedHashTypes | None,
+        backend: typing.Any = None,
+        *,
+        rsa_padding: padding.PSS | padding.PKCS1v15 | None = None,
+        ecdsa_deterministic: bool | None = None,
+    ) -> CertificateSigningRequest:
+        """
+        Signs the request using the requestor's private key.
+        """
+        if self._subject_name is None:
+            raise ValueError("A CertificateSigningRequest must have a subject")
+
+        if rsa_padding is not None:
+            if not isinstance(rsa_padding, (padding.PSS, padding.PKCS1v15)):
+                raise TypeError("Padding must be PSS or PKCS1v15")
+            if not isinstance(private_key, rsa.RSAPrivateKey):
+                raise TypeError("Padding is only supported for RSA keys")
+
+        if ecdsa_deterministic is not None:
+            if not isinstance(private_key, ec.EllipticCurvePrivateKey):
+                raise TypeError(
+                    "Deterministic ECDSA is only supported for EC keys"
+                )
+
+        return rust_x509.create_x509_csr(
+            self,
+            private_key,
+            algorithm,
+            rsa_padding,
+            ecdsa_deterministic,
+        )
+
+
+class CertificateBuilder:
+    _extensions: list[Extension[ExtensionType]]
+
+    def __init__(
+        self,
+        issuer_name: Name | None = None,
+        subject_name: Name | None = None,
+        public_key: CertificatePublicKeyTypes | None = None,
+        serial_number: int | None = None,
+        not_valid_before: datetime.datetime | None = None,
+        not_valid_after: datetime.datetime | None = None,
+        extensions: list[Extension[ExtensionType]] = [],
+        public_key_rsa_padding: type[padding.PSS] | None = None,
+    ) -> None:
+        self._version = Version.v3
+        self._issuer_name = issuer_name
+        self._subject_name = subject_name
+        self._public_key = public_key
+        self._serial_number = serial_number
+        self._not_valid_before = not_valid_before
+        self._not_valid_after = not_valid_after
+        self._extensions = extensions
+        self._public_key_rsa_padding = public_key_rsa_padding
+
+    def issuer_name(self, name: Name) -> CertificateBuilder:
+        """
+        Sets the CA's distinguished name.
+        """
+        if not isinstance(name, Name):
+            raise TypeError("Expecting x509.Name object.")
+        if self._issuer_name is not None:
+            raise ValueError("The issuer name may only be set once.")
+        return CertificateBuilder(
+            name,
+            self._subject_name,
+            self._public_key,
+            self._serial_number,
+            self._not_valid_before,
+            self._not_valid_after,
+            self._extensions,
+            self._public_key_rsa_padding,
+        )
+
+    def subject_name(self, name: Name) -> CertificateBuilder:
+        """
+        Sets the requestor's distinguished name.
+        """
+        if not isinstance(name, Name):
+            raise TypeError("Expecting x509.Name object.")
+        if self._subject_name is not None:
+            raise ValueError("The subject name may only be set once.")
+        return CertificateBuilder(
+            self._issuer_name,
+            name,
+            self._public_key,
+            self._serial_number,
+            self._not_valid_before,
+            self._not_valid_after,
+            self._extensions,
+            self._public_key_rsa_padding,
+        )
+
+    def public_key(
+        self,
+        key: CertificatePublicKeyTypes,
+        *,
+        rsa_padding: type[padding.PSS] | None = None,
+    ) -> CertificateBuilder:
+        """
+        Sets the requestor's public key (as found in the signing request).
+        """
+        if not isinstance(
+            key,
+            (
+                dsa.DSAPublicKey,
+                rsa.RSAPublicKey,
+                ec.EllipticCurvePublicKey,
+                ed25519.Ed25519PublicKey,
+                ed448.Ed448PublicKey,
+                mldsa.MLDSA44PublicKey,
+                mldsa.MLDSA65PublicKey,
+                mldsa.MLDSA87PublicKey,
+                mlkem.MLKEM768PublicKey,
+                mlkem.MLKEM1024PublicKey,
+                x25519.X25519PublicKey,
+                x448.X448PublicKey,
+            ),
+        ):
+            raise TypeError(
+                "Expecting one of DSAPublicKey, RSAPublicKey,"
+                " EllipticCurvePublicKey, Ed25519PublicKey,"
+                " Ed448PublicKey, MLDSA44PublicKey, MLDSA65PublicKey,"
+                " MLDSA87PublicKey, MLKEM768PublicKey, MLKEM1024PublicKey,"
+                " X25519PublicKey or X448PublicKey."
+            )
+        if rsa_padding is not None:
+            if rsa_padding is not padding.PSS:
+                raise TypeError(
+                    "rsa_padding must be the PSS class, not an instance"
+                )
+            if not isinstance(key, rsa.RSAPublicKey):
+                raise TypeError(
+                    "rsa_padding is only supported with RSA public keys"
+                )
+        if self._public_key is not None:
+            raise ValueError("The public key may only be set once.")
+        return CertificateBuilder(
+            self._issuer_name,
+            self._subject_name,
+            key,
+            self._serial_number,
+            self._not_valid_before,
+            self._not_valid_after,
+            self._extensions,
+            rsa_padding,
+        )
+
+    def serial_number(self, number: int) -> CertificateBuilder:
+        """
+        Sets the certificate serial number.
+        """
+        if not isinstance(number, int):
+            raise TypeError("Serial number must be of integral type.")
+        if self._serial_number is not None:
+            raise ValueError("The serial number may only be set once.")
+        if number <= 0:
+            raise ValueError("The serial number should be positive.")
+
+        # ASN.1 integers are always signed, so most significant bit must be
+        # zero.
+        if number.bit_length() >= 160:  # As defined in RFC 5280
+            raise ValueError(
+                "The serial number should not be more than 159 bits."
+            )
+        return CertificateBuilder(
+            self._issuer_name,
+            self._subject_name,
+            self._public_key,
+            number,
+            self._not_valid_before,
+            self._not_valid_after,
+            self._extensions,
+            self._public_key_rsa_padding,
+        )
+
+    def not_valid_before(self, time: datetime.datetime) -> CertificateBuilder:
+        """
+        Sets the certificate activation time.
+        """
+        if not isinstance(time, datetime.datetime):
+            raise TypeError("Expecting datetime object.")
+        if self._not_valid_before is not None:
+            raise ValueError("The not valid before may only be set once.")
+        time = _convert_to_naive_utc_time(time)
+        if time < _EARLIEST_UTC_TIME:
+            raise ValueError(
+                "The not valid before date must be on or after"
+                " 1950 January 1)."
+            )
+        if self._not_valid_after is not None and time > self._not_valid_after:
+            raise ValueError(
+                "The not valid before date must be before the not valid after "
+                "date."
+            )
+        return CertificateBuilder(
+            self._issuer_name,
+            self._subject_name,
+            self._public_key,
+            self._serial_number,
+            time,
+            self._not_valid_after,
+            self._extensions,
+            self._public_key_rsa_padding,
+        )
+
+    def not_valid_after(self, time: datetime.datetime) -> CertificateBuilder:
+        """
+        Sets the certificate expiration time.
+        """
+        if not isinstance(time, datetime.datetime):
+            raise TypeError("Expecting datetime object.")
+        if self._not_valid_after is not None:
+            raise ValueError("The not valid after may only be set once.")
+        time = _convert_to_naive_utc_time(time)
+        if time < _EARLIEST_UTC_TIME:
+            raise ValueError(
+                "The not valid after date must be on or after 1950 January 1."
+            )
+        if (
+            self._not_valid_before is not None
+            and time < self._not_valid_before
+        ):
+            raise ValueError(
+                "The not valid after date must be after the not valid before "
+                "date."
+            )
+        return CertificateBuilder(
+            self._issuer_name,
+            self._subject_name,
+            self._public_key,
+            self._serial_number,
+            self._not_valid_before,
+            time,
+            self._extensions,
+            self._public_key_rsa_padding,
+        )
+
+    def add_extension(
+        self, extval: ExtensionType, critical: bool
+    ) -> CertificateBuilder:
+        """
+        Adds an X.509 extension to the certificate.
+        """
+        if not isinstance(extval, ExtensionType):
+            raise TypeError("extension must be an ExtensionType")
+
+        extension = Extension(extval.oid, critical, extval)
+        _reject_duplicate_extension(extension, self._extensions)
+
+        return CertificateBuilder(
+            self._issuer_name,
+            self._subject_name,
+            self._public_key,
+            self._serial_number,
+            self._not_valid_before,
+            self._not_valid_after,
+            [*self._extensions, extension],
+            self._public_key_rsa_padding,
+        )
+
+    def sign(
+        self,
+        private_key: CertificateIssuerPrivateKeyTypes,
+        algorithm: _AllowedHashTypes | None,
+        backend: typing.Any = None,
+        *,
+        rsa_padding: padding.PSS | padding.PKCS1v15 | None = None,
+        ecdsa_deterministic: bool | None = None,
+    ) -> Certificate:
+        """
+        Signs the certificate using the CA's private key.
+        """
+        if self._subject_name is None:
+            raise ValueError("A certificate must have a subject name")
+
+        if self._issuer_name is None:
+            raise ValueError("A certificate must have an issuer name")
+
+        if self._serial_number is None:
+            raise ValueError("A certificate must have a serial number")
+
+        if self._not_valid_before is None:
+            raise ValueError("A certificate must have a not valid before time")
+
+        if self._not_valid_after is None:
+            raise ValueError("A certificate must have a not valid after time")
+
+        if self._public_key is None:
+            raise ValueError("A certificate must have a public key")
+
+        if private_key is None:
+            raise TypeError("Need private key to sign certificate")
+
+        if rsa_padding is not None:
+            if not isinstance(rsa_padding, (padding.PSS, padding.PKCS1v15)):
+                raise TypeError("Padding must be PSS or PKCS1v15")
+            if not isinstance(private_key, rsa.RSAPrivateKey):
+                raise TypeError("Padding is only supported for RSA keys")
+
+        if ecdsa_deterministic is not None:
+            if not isinstance(private_key, ec.EllipticCurvePrivateKey):
+                raise TypeError(
+                    "Deterministic ECDSA is only supported for EC keys"
+                )
+
+        return rust_x509.create_x509_certificate(
+            self,
+            private_key,
+            algorithm,
+            rsa_padding,
+            ecdsa_deterministic,
+        )
+
+    def create_unsigned(self) -> Certificate:
+        """
+        Creates an unsigned certificate, per RFC 9925.
+        """
+        if self._subject_name is None:
+            raise ValueError("A certificate must have a subject name")
+
+        if self._issuer_name is None:
+            raise ValueError("A certificate must have an issuer name")
+
+        if self._serial_number is None:
+            raise ValueError("A certificate must have a serial number")
+
+        if self._not_valid_before is None:
+            raise ValueError("A certificate must have a not valid before time")
+
+        if self._not_valid_after is None:
+            raise ValueError("A certificate must have a not valid after time")
+
+        if self._public_key is None:
+            raise ValueError("A certificate must have a public key")
+
+        return rust_x509.create_x509_certificate(
+            self,
+            private_key=None,
+            hash_algorithm=None,
+            rsa_padding=None,
+            ecdsa_deterministic=None,
+        )
+
+
+class CertificateRevocationListBuilder:
+    _extensions: list[Extension[ExtensionType]]
+    _revoked_certificates: list[RevokedCertificate]
+
+    def __init__(
+        self,
+        issuer_name: Name | None = None,
+        last_update: datetime.datetime | None = None,
+        next_update: datetime.datetime | None = None,
+        extensions: list[Extension[ExtensionType]] = [],
+        revoked_certificates: list[RevokedCertificate] = [],
+    ):
+        self._issuer_name = issuer_name
+        self._last_update = last_update
+        self._next_update = next_update
+        self._extensions = extensions
+        self._revoked_certificates = revoked_certificates
+
+    def issuer_name(
+        self, issuer_name: Name
+    ) -> CertificateRevocationListBuilder:
+        if not isinstance(issuer_name, Name):
+            raise TypeError("Expecting x509.Name object.")
+        if self._issuer_name is not None:
+            raise ValueError("The issuer name may only be set once.")
+        return CertificateRevocationListBuilder(
+            issuer_name,
+            self._last_update,
+            self._next_update,
+            self._extensions,
+            self._revoked_certificates,
+        )
+
+    def last_update(
+        self, last_update: datetime.datetime
+    ) -> CertificateRevocationListBuilder:
+        if not isinstance(last_update, datetime.datetime):
+            raise TypeError("Expecting datetime object.")
+        if self._last_update is not None:
+            raise ValueError("Last update may only be set once.")
+        last_update = _convert_to_naive_utc_time(last_update)
+        if last_update < _EARLIEST_UTC_TIME:
+            raise ValueError(
+                "The last update date must be on or after 1950 January 1."
+            )
+        if self._next_update is not None and last_update > self._next_update:
+            raise ValueError(
+                "The last update date must be before the next update date."
+            )
+        return CertificateRevocationListBuilder(
+            self._issuer_name,
+            last_update,
+            self._next_update,
+            self._extensions,
+            self._revoked_certificates,
+        )
+
+    def next_update(
+        self, next_update: datetime.datetime
+    ) -> CertificateRevocationListBuilder:
+        if not isinstance(next_update, datetime.datetime):
+            raise TypeError("Expecting datetime object.")
+        if self._next_update is not None:
+            raise ValueError("Last update may only be set once.")
+        next_update = _convert_to_naive_utc_time(next_update)
+        if next_update < _EARLIEST_UTC_TIME:
+            raise ValueError(
+                "The last update date must be on or after 1950 January 1."
+            )
+        if self._last_update is not None and next_update < self._last_update:
+            raise ValueError(
+                "The next update date must be after the last update date."
+            )
+        return CertificateRevocationListBuilder(
+            self._issuer_name,
+            self._last_update,
+            next_update,
+            self._extensions,
+            self._revoked_certificates,
+        )
+
+    def add_extension(
+        self, extval: ExtensionType, critical: bool
+    ) -> CertificateRevocationListBuilder:
+        """
+        Adds an X.509 extension to the certificate revocation list.
+        """
+        if not isinstance(extval, ExtensionType):
+            raise TypeError("extension must be an ExtensionType")
+
+        extension = Extension(extval.oid, critical, extval)
+        _reject_duplicate_extension(extension, self._extensions)
+        return CertificateRevocationListBuilder(
+            self._issuer_name,
+            self._last_update,
+            self._next_update,
+            [*self._extensions, extension],
+            self._revoked_certificates,
+        )
+
+    def add_revoked_certificate(
+        self, revoked_certificate: RevokedCertificate
+    ) -> CertificateRevocationListBuilder:
+        """
+        Adds a revoked certificate to the CRL.
+        """
+        if not isinstance(revoked_certificate, RevokedCertificate):
+            raise TypeError("Must be an instance of RevokedCertificate")
+
+        return CertificateRevocationListBuilder(
+            self._issuer_name,
+            self._last_update,
+            self._next_update,
+            self._extensions,
+            [*self._revoked_certificates, revoked_certificate],
+        )
+
+    def sign(
+        self,
+        private_key: CertificateIssuerPrivateKeyTypes,
+        algorithm: _AllowedHashTypes | None,
+        backend: typing.Any = None,
+        *,
+        rsa_padding: padding.PSS | padding.PKCS1v15 | None = None,
+        ecdsa_deterministic: bool | None = None,
+    ) -> CertificateRevocationList:
+        if self._issuer_name is None:
+            raise ValueError("A CRL must have an issuer name")
+
+        if self._last_update is None:
+            raise ValueError("A CRL must have a last update time")
+
+        if self._next_update is None:
+            raise ValueError("A CRL must have a next update time")
+
+        if rsa_padding is not None:
+            if not isinstance(rsa_padding, (padding.PSS, padding.PKCS1v15)):
+                raise TypeError("Padding must be PSS or PKCS1v15")
+            if not isinstance(private_key, rsa.RSAPrivateKey):
+                raise TypeError("Padding is only supported for RSA keys")
+
+        if ecdsa_deterministic is not None:
+            if not isinstance(private_key, ec.EllipticCurvePrivateKey):
+                raise TypeError(
+                    "Deterministic ECDSA is only supported for EC keys"
+                )
+
+        return rust_x509.create_x509_crl(
+            self,
+            private_key,
+            algorithm,
+            rsa_padding,
+            ecdsa_deterministic,
+        )
+
+
+class RevokedCertificateBuilder:
+    def __init__(
+        self,
+        serial_number: int | None = None,
+        revocation_date: datetime.datetime | None = None,
+        extensions: list[Extension[ExtensionType]] = [],
+    ):
+        self._serial_number = serial_number
+        self._revocation_date = revocation_date
+        self._extensions = extensions
+
+    def serial_number(self, number: int) -> RevokedCertificateBuilder:
+        if not isinstance(number, int):
+            raise TypeError("Serial number must be of integral type.")
+        if self._serial_number is not None:
+            raise ValueError("The serial number may only be set once.")
+        if number <= 0:
+            raise ValueError("The serial number should be positive")
+
+        # ASN.1 integers are always signed, so most significant bit must be
+        # zero.
+        if number.bit_length() >= 160:  # As defined in RFC 5280
+            raise ValueError(
+                "The serial number should not be more than 159 bits."
+            )
+        return RevokedCertificateBuilder(
+            number, self._revocation_date, self._extensions
+        )
+
+    def revocation_date(
+        self, time: datetime.datetime
+    ) -> RevokedCertificateBuilder:
+        if not isinstance(time, datetime.datetime):
+            raise TypeError("Expecting datetime object.")
+        if self._revocation_date is not None:
+            raise ValueError("The revocation date may only be set once.")
+        time = _convert_to_naive_utc_time(time)
+        if time < _EARLIEST_UTC_TIME:
+            raise ValueError(
+                "The revocation date must be on or after 1950 January 1."
+            )
+        return RevokedCertificateBuilder(
+            self._serial_number, time, self._extensions
+        )
+
+    def add_extension(
+        self, extval: ExtensionType, critical: bool
+    ) -> RevokedCertificateBuilder:
+        if not isinstance(extval, ExtensionType):
+            raise TypeError("extension must be an ExtensionType")
+
+        extension = Extension(extval.oid, critical, extval)
+        _reject_duplicate_extension(extension, self._extensions)
+        return RevokedCertificateBuilder(
+            self._serial_number,
+            self._revocation_date,
+            [*self._extensions, extension],
+        )
+
+    def build(self, backend: typing.Any = None) -> RevokedCertificate:
+        if self._serial_number is None:
+            raise ValueError("A revoked certificate must have a serial number")
+        if self._revocation_date is None:
+            raise ValueError(
+                "A revoked certificate must have a revocation date"
+            )
+        return rust_x509.create_revoked_certificate(self)
+
+
+def random_serial_number() -> int:
+    return int.from_bytes(os.urandom(20), "big") >> 1

.mcp-venv/lib/python3.13/site-packages/cryptography/x509/certificate_transparency.py

@@ -0,0 +1,35 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography import utils
+from cryptography.hazmat.bindings._rust import x509 as rust_x509
+
+
+class LogEntryType(utils.Enum):
+    X509_CERTIFICATE = 0
+    PRE_CERTIFICATE = 1
+
+
+class Version(utils.Enum):
+    v1 = 0
+
+
+class SignatureAlgorithm(utils.Enum):
+    """
+    Signature algorithms that are valid for SCTs.
+
+    These are exactly the same as SignatureAlgorithm in RFC 5246 (TLS 1.2).
+
+    See: <https://datatracker.ietf.org/doc/html/rfc5246#section-7.4.1.4.1>
+    """
+
+    ANONYMOUS = 0
+    RSA = 1
+    DSA = 2
+    ECDSA = 3
+
+
+SignedCertificateTimestamp = rust_x509.Sct

.mcp-venv/lib/python3.13/site-packages/cryptography/x509/extensions.py

@@ -0,0 +1,2533 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import abc
+import datetime
+import hashlib
+import ipaddress
+import typing
+from collections.abc import Iterable, Iterator
+
+from cryptography import utils
+from cryptography.hazmat.bindings._rust import asn1
+from cryptography.hazmat.bindings._rust import x509 as rust_x509
+from cryptography.hazmat.primitives import _serialization, constant_time
+from cryptography.hazmat.primitives.asymmetric.ec import EllipticCurvePublicKey
+from cryptography.hazmat.primitives.asymmetric.rsa import RSAPublicKey
+from cryptography.hazmat.primitives.asymmetric.types import (
+    CertificateIssuerPublicKeyTypes,
+    CertificatePublicKeyTypes,
+)
+from cryptography.x509.certificate_transparency import (
+    SignedCertificateTimestamp,
+)
+from cryptography.x509.general_name import (
+    DirectoryName,
+    DNSName,
+    GeneralName,
+    IPAddress,
+    OtherName,
+    RegisteredID,
+    RFC822Name,
+    UniformResourceIdentifier,
+    _IPAddressTypes,
+)
+from cryptography.x509.name import Name, RelativeDistinguishedName
+from cryptography.x509.oid import (
+    CRLEntryExtensionOID,
+    ExtensionOID,
+    ObjectIdentifier,
+    OCSPExtensionOID,
+)
+
+ExtensionTypeVar = typing.TypeVar(
+    "ExtensionTypeVar", bound="ExtensionType", covariant=True
+)
+
+
+def _key_identifier_from_public_key(
+    public_key: CertificatePublicKeyTypes,
+) -> bytes:
+    if isinstance(public_key, RSAPublicKey):
+        data = public_key.public_bytes(
+            _serialization.Encoding.DER,
+            _serialization.PublicFormat.PKCS1,
+        )
+    elif isinstance(public_key, EllipticCurvePublicKey):
+        data = public_key.public_bytes(
+            _serialization.Encoding.X962,
+            _serialization.PublicFormat.UncompressedPoint,
+        )
+    else:
+        # This is a very slow way to do this.
+        serialized = public_key.public_bytes(
+            _serialization.Encoding.DER,
+            _serialization.PublicFormat.SubjectPublicKeyInfo,
+        )
+        data = asn1.parse_spki_for_data(serialized)
+
+    return hashlib.sha1(data).digest()
+
+
+def _make_sequence_methods(field_name: str):
+    def len_method(self) -> int:
+        return len(getattr(self, field_name))
+
+    def iter_method(self):
+        return iter(getattr(self, field_name))
+
+    def getitem_method(self, idx):
+        return getattr(self, field_name)[idx]
+
+    return len_method, iter_method, getitem_method
+
+
+class DuplicateExtension(Exception):
+    def __init__(self, msg: str, oid: ObjectIdentifier) -> None:
+        super().__init__(msg)
+        self.oid = oid
+
+
+class ExtensionNotFound(Exception):
+    def __init__(self, msg: str, oid: ObjectIdentifier) -> None:
+        super().__init__(msg)
+        self.oid = oid
+
+
+class ExtensionType(metaclass=abc.ABCMeta):
+    oid: typing.ClassVar[ObjectIdentifier]
+
+    def public_bytes(self) -> bytes:
+        """
+        Serializes the extension type to DER.
+        """
+        raise NotImplementedError(
+            f"public_bytes is not implemented for extension type {self!r}"
+        )
+
+
+class Extensions:
+    def __init__(self, extensions: Iterable[Extension[ExtensionType]]) -> None:
+        self._extensions = list(extensions)
+
+    def get_extension_for_oid(
+        self, oid: ObjectIdentifier
+    ) -> Extension[ExtensionType]:
+        for ext in self:
+            if ext.oid == oid:
+                return ext
+
+        raise ExtensionNotFound(f"No {oid} extension was found", oid)
+
+    def get_extension_for_class(
+        self, extclass: type[ExtensionTypeVar]
+    ) -> Extension[ExtensionTypeVar]:
+        if extclass is UnrecognizedExtension:
+            raise TypeError(
+                "UnrecognizedExtension can't be used with "
+                "get_extension_for_class because more than one instance of the"
+                " class may be present."
+            )
+
+        for ext in self:
+            if isinstance(ext.value, extclass):
+                return ext
+
+        raise ExtensionNotFound(
+            f"No {extclass} extension was found", extclass.oid
+        )
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods("_extensions")
+
+    def __repr__(self) -> str:
+        return f"<Extensions({self._extensions})>"
+
+
+class CRLNumber(ExtensionType):
+    oid = ExtensionOID.CRL_NUMBER
+
+    def __init__(self, crl_number: int) -> None:
+        if not isinstance(crl_number, int):
+            raise TypeError("crl_number must be an integer")
+
+        self._crl_number = crl_number
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, CRLNumber):
+            return NotImplemented
+
+        return self.crl_number == other.crl_number
+
+    def __hash__(self) -> int:
+        return hash(self.crl_number)
+
+    def __repr__(self) -> str:
+        return f"<CRLNumber({self.crl_number})>"
+
+    @property
+    def crl_number(self) -> int:
+        return self._crl_number
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class AuthorityKeyIdentifier(ExtensionType):
+    oid = ExtensionOID.AUTHORITY_KEY_IDENTIFIER
+
+    def __init__(
+        self,
+        key_identifier: bytes | None,
+        authority_cert_issuer: Iterable[GeneralName] | None,
+        authority_cert_serial_number: int | None,
+    ) -> None:
+        if (authority_cert_issuer is None) != (
+            authority_cert_serial_number is None
+        ):
+            raise ValueError(
+                "authority_cert_issuer and authority_cert_serial_number "
+                "must both be present or both None"
+            )
+
+        if authority_cert_issuer is not None:
+            authority_cert_issuer = list(authority_cert_issuer)
+            if not all(
+                isinstance(x, GeneralName) for x in authority_cert_issuer
+            ):
+                raise TypeError(
+                    "authority_cert_issuer must be a list of GeneralName "
+                    "objects"
+                )
+
+        if authority_cert_serial_number is not None and not isinstance(
+            authority_cert_serial_number, int
+        ):
+            raise TypeError("authority_cert_serial_number must be an integer")
+
+        self._key_identifier = key_identifier
+        self._authority_cert_issuer = authority_cert_issuer
+        self._authority_cert_serial_number = authority_cert_serial_number
+
+    # This takes a subset of CertificatePublicKeyTypes because an issuer
+    # cannot have an X25519/X448 key. This introduces some unfortunate
+    # asymmetry that requires typing users to explicitly
+    # narrow their type, but we should make this accurate and not just
+    # convenient.
+    @classmethod
+    def from_issuer_public_key(
+        cls, public_key: CertificateIssuerPublicKeyTypes
+    ) -> AuthorityKeyIdentifier:
+        digest = _key_identifier_from_public_key(public_key)
+        return cls(
+            key_identifier=digest,
+            authority_cert_issuer=None,
+            authority_cert_serial_number=None,
+        )
+
+    @classmethod
+    def from_issuer_subject_key_identifier(
+        cls, ski: SubjectKeyIdentifier
+    ) -> AuthorityKeyIdentifier:
+        return cls(
+            key_identifier=ski.digest,
+            authority_cert_issuer=None,
+            authority_cert_serial_number=None,
+        )
+
+    def __repr__(self) -> str:
+        return (
+            f"<AuthorityKeyIdentifier(key_identifier={self.key_identifier!r}, "
+            f"authority_cert_issuer={self.authority_cert_issuer}, "
+            f"authority_cert_serial_number={self.authority_cert_serial_number}"
+            ")>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, AuthorityKeyIdentifier):
+            return NotImplemented
+
+        return (
+            self.key_identifier == other.key_identifier
+            and self.authority_cert_issuer == other.authority_cert_issuer
+            and self.authority_cert_serial_number
+            == other.authority_cert_serial_number
+        )
+
+    def __hash__(self) -> int:
+        if self.authority_cert_issuer is None:
+            aci = None
+        else:
+            aci = tuple(self.authority_cert_issuer)
+        return hash(
+            (self.key_identifier, aci, self.authority_cert_serial_number)
+        )
+
+    @property
+    def key_identifier(self) -> bytes | None:
+        return self._key_identifier
+
+    @property
+    def authority_cert_issuer(
+        self,
+    ) -> list[GeneralName] | None:
+        return self._authority_cert_issuer
+
+    @property
+    def authority_cert_serial_number(self) -> int | None:
+        return self._authority_cert_serial_number
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class SubjectKeyIdentifier(ExtensionType):
+    oid = ExtensionOID.SUBJECT_KEY_IDENTIFIER
+
+    def __init__(self, digest: bytes) -> None:
+        self._digest = digest
+
+    @classmethod
+    def from_public_key(
+        cls, public_key: CertificatePublicKeyTypes
+    ) -> SubjectKeyIdentifier:
+        return cls(_key_identifier_from_public_key(public_key))
+
+    @property
+    def digest(self) -> bytes:
+        return self._digest
+
+    @property
+    def key_identifier(self) -> bytes:
+        return self._digest
+
+    def __repr__(self) -> str:
+        return f"<SubjectKeyIdentifier(digest={self.digest!r})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SubjectKeyIdentifier):
+            return NotImplemented
+
+        return constant_time.bytes_eq(self.digest, other.digest)
+
+    def __hash__(self) -> int:
+        return hash(self.digest)
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class AuthorityInformationAccess(ExtensionType):
+    oid = ExtensionOID.AUTHORITY_INFORMATION_ACCESS
+
+    def __init__(self, descriptions: Iterable[AccessDescription]) -> None:
+        descriptions = list(descriptions)
+        if not all(isinstance(x, AccessDescription) for x in descriptions):
+            raise TypeError(
+                "Every item in the descriptions list must be an "
+                "AccessDescription"
+            )
+
+        self._descriptions = descriptions
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods("_descriptions")
+
+    def __repr__(self) -> str:
+        return f"<AuthorityInformationAccess({self._descriptions})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, AuthorityInformationAccess):
+            return NotImplemented
+
+        return self._descriptions == other._descriptions
+
+    def __hash__(self) -> int:
+        return hash(tuple(self._descriptions))
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class SubjectInformationAccess(ExtensionType):
+    oid = ExtensionOID.SUBJECT_INFORMATION_ACCESS
+
+    def __init__(self, descriptions: Iterable[AccessDescription]) -> None:
+        descriptions = list(descriptions)
+        if not all(isinstance(x, AccessDescription) for x in descriptions):
+            raise TypeError(
+                "Every item in the descriptions list must be an "
+                "AccessDescription"
+            )
+
+        self._descriptions = descriptions
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods("_descriptions")
+
+    def __repr__(self) -> str:
+        return f"<SubjectInformationAccess({self._descriptions})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SubjectInformationAccess):
+            return NotImplemented
+
+        return self._descriptions == other._descriptions
+
+    def __hash__(self) -> int:
+        return hash(tuple(self._descriptions))
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class AccessDescription:
+    def __init__(
+        self, access_method: ObjectIdentifier, access_location: GeneralName
+    ) -> None:
+        if not isinstance(access_method, ObjectIdentifier):
+            raise TypeError("access_method must be an ObjectIdentifier")
+
+        if not isinstance(access_location, GeneralName):
+            raise TypeError("access_location must be a GeneralName")
+
+        self._access_method = access_method
+        self._access_location = access_location
+
+    def __repr__(self) -> str:
+        return (
+            f"<AccessDescription(access_method={self.access_method}, "
+            f"access_location={self.access_location})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, AccessDescription):
+            return NotImplemented
+
+        return (
+            self.access_method == other.access_method
+            and self.access_location == other.access_location
+        )
+
+    def __hash__(self) -> int:
+        return hash((self.access_method, self.access_location))
+
+    @property
+    def access_method(self) -> ObjectIdentifier:
+        return self._access_method
+
+    @property
+    def access_location(self) -> GeneralName:
+        return self._access_location
+
+
+class BasicConstraints(ExtensionType):
+    oid = ExtensionOID.BASIC_CONSTRAINTS
+
+    def __init__(self, ca: bool, path_length: int | None) -> None:
+        if not isinstance(ca, bool):
+            raise TypeError("ca must be a boolean value")
+
+        if path_length is not None and not ca:
+            raise ValueError("path_length must be None when ca is False")
+
+        if path_length is not None and (
+            not isinstance(path_length, int) or path_length < 0
+        ):
+            raise TypeError(
+                "path_length must be a non-negative integer or None"
+            )
+
+        self._ca = ca
+        self._path_length = path_length
+
+    @property
+    def ca(self) -> bool:
+        return self._ca
+
+    @property
+    def path_length(self) -> int | None:
+        return self._path_length
+
+    def __repr__(self) -> str:
+        return (
+            f"<BasicConstraints(ca={self.ca}, path_length={self.path_length})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, BasicConstraints):
+            return NotImplemented
+
+        return self.ca == other.ca and self.path_length == other.path_length
+
+    def __hash__(self) -> int:
+        return hash((self.ca, self.path_length))
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class DeltaCRLIndicator(ExtensionType):
+    oid = ExtensionOID.DELTA_CRL_INDICATOR
+
+    def __init__(self, crl_number: int) -> None:
+        if not isinstance(crl_number, int):
+            raise TypeError("crl_number must be an integer")
+
+        self._crl_number = crl_number
+
+    @property
+    def crl_number(self) -> int:
+        return self._crl_number
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, DeltaCRLIndicator):
+            return NotImplemented
+
+        return self.crl_number == other.crl_number
+
+    def __hash__(self) -> int:
+        return hash(self.crl_number)
+
+    def __repr__(self) -> str:
+        return f"<DeltaCRLIndicator(crl_number={self.crl_number})>"
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class CRLDistributionPoints(ExtensionType):
+    oid = ExtensionOID.CRL_DISTRIBUTION_POINTS
+
+    def __init__(
+        self, distribution_points: Iterable[DistributionPoint]
+    ) -> None:
+        distribution_points = list(distribution_points)
+        if not all(
+            isinstance(x, DistributionPoint) for x in distribution_points
+        ):
+            raise TypeError(
+                "distribution_points must be a list of DistributionPoint "
+                "objects"
+            )
+
+        self._distribution_points = distribution_points
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods(
+        "_distribution_points"
+    )
+
+    def __repr__(self) -> str:
+        return f"<CRLDistributionPoints({self._distribution_points})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, CRLDistributionPoints):
+            return NotImplemented
+
+        return self._distribution_points == other._distribution_points
+
+    def __hash__(self) -> int:
+        return hash(tuple(self._distribution_points))
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class FreshestCRL(ExtensionType):
+    oid = ExtensionOID.FRESHEST_CRL
+
+    def __init__(
+        self, distribution_points: Iterable[DistributionPoint]
+    ) -> None:
+        distribution_points = list(distribution_points)
+        if not all(
+            isinstance(x, DistributionPoint) for x in distribution_points
+        ):
+            raise TypeError(
+                "distribution_points must be a list of DistributionPoint "
+                "objects"
+            )
+
+        self._distribution_points = distribution_points
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods(
+        "_distribution_points"
+    )
+
+    def __repr__(self) -> str:
+        return f"<FreshestCRL({self._distribution_points})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, FreshestCRL):
+            return NotImplemented
+
+        return self._distribution_points == other._distribution_points
+
+    def __hash__(self) -> int:
+        return hash(tuple(self._distribution_points))
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class DistributionPoint:
+    def __init__(
+        self,
+        full_name: Iterable[GeneralName] | None,
+        relative_name: RelativeDistinguishedName | None,
+        reasons: frozenset[ReasonFlags] | None,
+        crl_issuer: Iterable[GeneralName] | None,
+    ) -> None:
+        if full_name and relative_name:
+            raise ValueError(
+                "You cannot provide both full_name and relative_name, at "
+                "least one must be None."
+            )
+        if not full_name and not relative_name and not crl_issuer:
+            raise ValueError(
+                "Either full_name, relative_name or crl_issuer must be "
+                "provided."
+            )
+
+        if full_name is not None:
+            full_name = list(full_name)
+            if not all(isinstance(x, GeneralName) for x in full_name):
+                raise TypeError(
+                    "full_name must be a list of GeneralName objects"
+                )
+
+        if relative_name:
+            if not isinstance(relative_name, RelativeDistinguishedName):
+                raise TypeError(
+                    "relative_name must be a RelativeDistinguishedName"
+                )
+
+        if crl_issuer is not None:
+            crl_issuer = list(crl_issuer)
+            if not all(isinstance(x, GeneralName) for x in crl_issuer):
+                raise TypeError(
+                    "crl_issuer must be None or a list of general names"
+                )
+
+        if reasons and (
+            not isinstance(reasons, frozenset)
+            or not all(isinstance(x, ReasonFlags) for x in reasons)
+        ):
+            raise TypeError("reasons must be None or frozenset of ReasonFlags")
+
+        if reasons and (
+            ReasonFlags.unspecified in reasons
+            or ReasonFlags.remove_from_crl in reasons
+        ):
+            raise ValueError(
+                "unspecified and remove_from_crl are not valid reasons in a "
+                "DistributionPoint"
+            )
+
+        self._full_name = full_name
+        self._relative_name = relative_name
+        self._reasons = reasons
+        self._crl_issuer = crl_issuer
+
+    def __repr__(self) -> str:
+        return (
+            "<DistributionPoint(full_name={0.full_name}, relative_name={0.rela"
+            "tive_name}, reasons={0.reasons}, "
+            "crl_issuer={0.crl_issuer})>".format(self)
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, DistributionPoint):
+            return NotImplemented
+
+        return (
+            self.full_name == other.full_name
+            and self.relative_name == other.relative_name
+            and self.reasons == other.reasons
+            and self.crl_issuer == other.crl_issuer
+        )
+
+    def __hash__(self) -> int:
+        if self.full_name is not None:
+            fn: tuple[GeneralName, ...] | None = tuple(self.full_name)
+        else:
+            fn = None
+
+        if self.crl_issuer is not None:
+            crl_issuer: tuple[GeneralName, ...] | None = tuple(self.crl_issuer)
+        else:
+            crl_issuer = None
+
+        return hash((fn, self.relative_name, self.reasons, crl_issuer))
+
+    @property
+    def full_name(self) -> list[GeneralName] | None:
+        return self._full_name
+
+    @property
+    def relative_name(self) -> RelativeDistinguishedName | None:
+        return self._relative_name
+
+    @property
+    def reasons(self) -> frozenset[ReasonFlags] | None:
+        return self._reasons
+
+    @property
+    def crl_issuer(self) -> list[GeneralName] | None:
+        return self._crl_issuer
+
+
+class ReasonFlags(utils.Enum):
+    unspecified = "unspecified"
+    key_compromise = "keyCompromise"
+    ca_compromise = "cACompromise"
+    affiliation_changed = "affiliationChanged"
+    superseded = "superseded"
+    cessation_of_operation = "cessationOfOperation"
+    certificate_hold = "certificateHold"
+    privilege_withdrawn = "privilegeWithdrawn"
+    aa_compromise = "aACompromise"
+    remove_from_crl = "removeFromCRL"
+
+
+# These are distribution point bit string mappings. Not to be confused with
+# CRLReason reason flags bit string mappings.
+# ReasonFlags ::= BIT STRING {
+#      unused                  (0),
+#      keyCompromise           (1),
+#      cACompromise            (2),
+#      affiliationChanged      (3),
+#      superseded              (4),
+#      cessationOfOperation    (5),
+#      certificateHold         (6),
+#      privilegeWithdrawn      (7),
+#      aACompromise            (8) }
+_REASON_BIT_MAPPING = {
+    1: ReasonFlags.key_compromise,
+    2: ReasonFlags.ca_compromise,
+    3: ReasonFlags.affiliation_changed,
+    4: ReasonFlags.superseded,
+    5: ReasonFlags.cessation_of_operation,
+    6: ReasonFlags.certificate_hold,
+    7: ReasonFlags.privilege_withdrawn,
+    8: ReasonFlags.aa_compromise,
+}
+
+_CRLREASONFLAGS = {
+    ReasonFlags.key_compromise: 1,
+    ReasonFlags.ca_compromise: 2,
+    ReasonFlags.affiliation_changed: 3,
+    ReasonFlags.superseded: 4,
+    ReasonFlags.cessation_of_operation: 5,
+    ReasonFlags.certificate_hold: 6,
+    ReasonFlags.privilege_withdrawn: 7,
+    ReasonFlags.aa_compromise: 8,
+}
+
+#    CRLReason ::= ENUMERATED {
+#        unspecified             (0),
+#        keyCompromise           (1),
+#        cACompromise            (2),
+#        affiliationChanged      (3),
+#        superseded              (4),
+#        cessationOfOperation    (5),
+#        certificateHold         (6),
+#             -- value 7 is not used
+#        removeFromCRL           (8),
+#        privilegeWithdrawn      (9),
+#        aACompromise           (10) }
+_CRL_ENTRY_REASON_ENUM_TO_CODE = {
+    ReasonFlags.unspecified: 0,
+    ReasonFlags.key_compromise: 1,
+    ReasonFlags.ca_compromise: 2,
+    ReasonFlags.affiliation_changed: 3,
+    ReasonFlags.superseded: 4,
+    ReasonFlags.cessation_of_operation: 5,
+    ReasonFlags.certificate_hold: 6,
+    ReasonFlags.remove_from_crl: 8,
+    ReasonFlags.privilege_withdrawn: 9,
+    ReasonFlags.aa_compromise: 10,
+}
+
+
+class PolicyConstraints(ExtensionType):
+    oid = ExtensionOID.POLICY_CONSTRAINTS
+
+    def __init__(
+        self,
+        require_explicit_policy: int | None,
+        inhibit_policy_mapping: int | None,
+    ) -> None:
+        if require_explicit_policy is not None and not isinstance(
+            require_explicit_policy, int
+        ):
+            raise TypeError(
+                "require_explicit_policy must be a non-negative integer or "
+                "None"
+            )
+
+        if inhibit_policy_mapping is not None and not isinstance(
+            inhibit_policy_mapping, int
+        ):
+            raise TypeError(
+                "inhibit_policy_mapping must be a non-negative integer or None"
+            )
+
+        if inhibit_policy_mapping is None and require_explicit_policy is None:
+            raise ValueError(
+                "At least one of require_explicit_policy and "
+                "inhibit_policy_mapping must not be None"
+            )
+
+        self._require_explicit_policy = require_explicit_policy
+        self._inhibit_policy_mapping = inhibit_policy_mapping
+
+    def __repr__(self) -> str:
+        return (
+            "<PolicyConstraints(require_explicit_policy={0.require_explicit"
+            "_policy}, inhibit_policy_mapping={0.inhibit_policy_"
+            "mapping})>".format(self)
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, PolicyConstraints):
+            return NotImplemented
+
+        return (
+            self.require_explicit_policy == other.require_explicit_policy
+            and self.inhibit_policy_mapping == other.inhibit_policy_mapping
+        )
+
+    def __hash__(self) -> int:
+        return hash(
+            (self.require_explicit_policy, self.inhibit_policy_mapping)
+        )
+
+    @property
+    def require_explicit_policy(self) -> int | None:
+        return self._require_explicit_policy
+
+    @property
+    def inhibit_policy_mapping(self) -> int | None:
+        return self._inhibit_policy_mapping
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class CertificatePolicies(ExtensionType):
+    oid = ExtensionOID.CERTIFICATE_POLICIES
+
+    def __init__(self, policies: Iterable[PolicyInformation]) -> None:
+        policies = list(policies)
+        if not all(isinstance(x, PolicyInformation) for x in policies):
+            raise TypeError(
+                "Every item in the policies list must be a PolicyInformation"
+            )
+
+        self._policies = policies
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods("_policies")
+
+    def __repr__(self) -> str:
+        return f"<CertificatePolicies({self._policies})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, CertificatePolicies):
+            return NotImplemented
+
+        return self._policies == other._policies
+
+    def __hash__(self) -> int:
+        return hash(tuple(self._policies))
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class PolicyInformation:
+    def __init__(
+        self,
+        policy_identifier: ObjectIdentifier,
+        policy_qualifiers: Iterable[str | UserNotice] | None,
+    ) -> None:
+        if not isinstance(policy_identifier, ObjectIdentifier):
+            raise TypeError("policy_identifier must be an ObjectIdentifier")
+
+        self._policy_identifier = policy_identifier
+
+        if policy_qualifiers is not None:
+            policy_qualifiers = list(policy_qualifiers)
+            if not all(
+                isinstance(x, (str, UserNotice)) for x in policy_qualifiers
+            ):
+                raise TypeError(
+                    "policy_qualifiers must be a list of strings and/or "
+                    "UserNotice objects or None"
+                )
+
+        self._policy_qualifiers = policy_qualifiers
+
+    def __repr__(self) -> str:
+        return (
+            f"<PolicyInformation(policy_identifier={self.policy_identifier}, "
+            f"policy_qualifiers={self.policy_qualifiers})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, PolicyInformation):
+            return NotImplemented
+
+        return (
+            self.policy_identifier == other.policy_identifier
+            and self.policy_qualifiers == other.policy_qualifiers
+        )
+
+    def __hash__(self) -> int:
+        if self.policy_qualifiers is not None:
+            pq = tuple(self.policy_qualifiers)
+        else:
+            pq = None
+
+        return hash((self.policy_identifier, pq))
+
+    @property
+    def policy_identifier(self) -> ObjectIdentifier:
+        return self._policy_identifier
+
+    @property
+    def policy_qualifiers(
+        self,
+    ) -> list[str | UserNotice] | None:
+        return self._policy_qualifiers
+
+
+class UserNotice:
+    def __init__(
+        self,
+        notice_reference: NoticeReference | None,
+        explicit_text: str | None,
+    ) -> None:
+        if notice_reference and not isinstance(
+            notice_reference, NoticeReference
+        ):
+            raise TypeError(
+                "notice_reference must be None or a NoticeReference"
+            )
+
+        self._notice_reference = notice_reference
+        self._explicit_text = explicit_text
+
+    def __repr__(self) -> str:
+        return (
+            f"<UserNotice(notice_reference={self.notice_reference}, "
+            f"explicit_text={self.explicit_text!r})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, UserNotice):
+            return NotImplemented
+
+        return (
+            self.notice_reference == other.notice_reference
+            and self.explicit_text == other.explicit_text
+        )
+
+    def __hash__(self) -> int:
+        return hash((self.notice_reference, self.explicit_text))
+
+    @property
+    def notice_reference(self) -> NoticeReference | None:
+        return self._notice_reference
+
+    @property
+    def explicit_text(self) -> str | None:
+        return self._explicit_text
+
+
+class NoticeReference:
+    def __init__(
+        self,
+        organization: str | None,
+        notice_numbers: Iterable[int],
+    ) -> None:
+        self._organization = organization
+        notice_numbers = list(notice_numbers)
+        if not all(isinstance(x, int) for x in notice_numbers):
+            raise TypeError("notice_numbers must be a list of integers")
+
+        self._notice_numbers = notice_numbers
+
+    def __repr__(self) -> str:
+        return (
+            f"<NoticeReference(organization={self.organization!r}, "
+            f"notice_numbers={self.notice_numbers})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, NoticeReference):
+            return NotImplemented
+
+        return (
+            self.organization == other.organization
+            and self.notice_numbers == other.notice_numbers
+        )
+
+    def __hash__(self) -> int:
+        return hash((self.organization, tuple(self.notice_numbers)))
+
+    @property
+    def organization(self) -> str | None:
+        return self._organization
+
+    @property
+    def notice_numbers(self) -> list[int]:
+        return self._notice_numbers
+
+
+class ExtendedKeyUsage(ExtensionType):
+    oid = ExtensionOID.EXTENDED_KEY_USAGE
+
+    def __init__(self, usages: Iterable[ObjectIdentifier]) -> None:
+        usages = list(usages)
+        if not all(isinstance(x, ObjectIdentifier) for x in usages):
+            raise TypeError(
+                "Every item in the usages list must be an ObjectIdentifier"
+            )
+
+        self._usages = usages
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods("_usages")
+
+    def __repr__(self) -> str:
+        return f"<ExtendedKeyUsage({self._usages})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, ExtendedKeyUsage):
+            return NotImplemented
+
+        return self._usages == other._usages
+
+    def __hash__(self) -> int:
+        return hash(tuple(self._usages))
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class OCSPNoCheck(ExtensionType):
+    oid = ExtensionOID.OCSP_NO_CHECK
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, OCSPNoCheck):
+            return NotImplemented
+
+        return True
+
+    def __hash__(self) -> int:
+        return hash(OCSPNoCheck)
+
+    def __repr__(self) -> str:
+        return "<OCSPNoCheck()>"
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class PrecertPoison(ExtensionType):
+    oid = ExtensionOID.PRECERT_POISON
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, PrecertPoison):
+            return NotImplemented
+
+        return True
+
+    def __hash__(self) -> int:
+        return hash(PrecertPoison)
+
+    def __repr__(self) -> str:
+        return "<PrecertPoison()>"
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class TLSFeature(ExtensionType):
+    oid = ExtensionOID.TLS_FEATURE
+
+    def __init__(self, features: Iterable[TLSFeatureType]) -> None:
+        features = list(features)
+        if (
+            not all(isinstance(x, TLSFeatureType) for x in features)
+            or len(features) == 0
+        ):
+            raise TypeError(
+                "features must be a list of elements from the TLSFeatureType "
+                "enum"
+            )
+
+        self._features = features
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods("_features")
+
+    def __repr__(self) -> str:
+        return f"<TLSFeature(features={self._features})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, TLSFeature):
+            return NotImplemented
+
+        return self._features == other._features
+
+    def __hash__(self) -> int:
+        return hash(tuple(self._features))
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class TLSFeatureType(utils.Enum):
+    # status_request is defined in RFC 6066 and is used for what is commonly
+    # called OCSP Must-Staple when present in the TLS Feature extension in an
+    # X.509 certificate.
+    status_request = 5
+    # status_request_v2 is defined in RFC 6961 and allows multiple OCSP
+    # responses to be provided. It is not currently in use by clients or
+    # servers.
+    status_request_v2 = 17
+
+
+_TLS_FEATURE_TYPE_TO_ENUM = {x.value: x for x in TLSFeatureType}
+
+
+class InhibitAnyPolicy(ExtensionType):
+    oid = ExtensionOID.INHIBIT_ANY_POLICY
+
+    def __init__(self, skip_certs: int) -> None:
+        if not isinstance(skip_certs, int):
+            raise TypeError("skip_certs must be an integer")
+
+        if skip_certs < 0:
+            raise ValueError("skip_certs must be a non-negative integer")
+
+        self._skip_certs = skip_certs
+
+    def __repr__(self) -> str:
+        return f"<InhibitAnyPolicy(skip_certs={self.skip_certs})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, InhibitAnyPolicy):
+            return NotImplemented
+
+        return self.skip_certs == other.skip_certs
+
+    def __hash__(self) -> int:
+        return hash(self.skip_certs)
+
+    @property
+    def skip_certs(self) -> int:
+        return self._skip_certs
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class KeyUsage(ExtensionType):
+    oid = ExtensionOID.KEY_USAGE
+
+    def __init__(
+        self,
+        digital_signature: bool,
+        content_commitment: bool,
+        key_encipherment: bool,
+        data_encipherment: bool,
+        key_agreement: bool,
+        key_cert_sign: bool,
+        crl_sign: bool,
+        encipher_only: bool,
+        decipher_only: bool,
+    ) -> None:
+        if not key_agreement and (encipher_only or decipher_only):
+            raise ValueError(
+                "encipher_only and decipher_only can only be true when "
+                "key_agreement is true"
+            )
+
+        self._digital_signature = digital_signature
+        self._content_commitment = content_commitment
+        self._key_encipherment = key_encipherment
+        self._data_encipherment = data_encipherment
+        self._key_agreement = key_agreement
+        self._key_cert_sign = key_cert_sign
+        self._crl_sign = crl_sign
+        self._encipher_only = encipher_only
+        self._decipher_only = decipher_only
+
+    @property
+    def digital_signature(self) -> bool:
+        return self._digital_signature
+
+    @property
+    def content_commitment(self) -> bool:
+        return self._content_commitment
+
+    @property
+    def key_encipherment(self) -> bool:
+        return self._key_encipherment
+
+    @property
+    def data_encipherment(self) -> bool:
+        return self._data_encipherment
+
+    @property
+    def key_agreement(self) -> bool:
+        return self._key_agreement
+
+    @property
+    def key_cert_sign(self) -> bool:
+        return self._key_cert_sign
+
+    @property
+    def crl_sign(self) -> bool:
+        return self._crl_sign
+
+    @property
+    def encipher_only(self) -> bool:
+        if not self.key_agreement:
+            raise ValueError(
+                "encipher_only is undefined unless key_agreement is true"
+            )
+        else:
+            return self._encipher_only
+
+    @property
+    def decipher_only(self) -> bool:
+        if not self.key_agreement:
+            raise ValueError(
+                "decipher_only is undefined unless key_agreement is true"
+            )
+        else:
+            return self._decipher_only
+
+    def __repr__(self) -> str:
+        try:
+            encipher_only = self.encipher_only
+            decipher_only = self.decipher_only
+        except ValueError:
+            # Users found None confusing because even though encipher/decipher
+            # have no meaning unless key_agreement is true, to construct an
+            # instance of the class you still need to pass False.
+            encipher_only = False
+            decipher_only = False
+
+        return (
+            f"<KeyUsage(digital_signature={self.digital_signature}, "
+            f"content_commitment={self.content_commitment}, "
+            f"key_encipherment={self.key_encipherment}, "
+            f"data_encipherment={self.data_encipherment}, "
+            f"key_agreement={self.key_agreement}, "
+            f"key_cert_sign={self.key_cert_sign}, crl_sign={self.crl_sign}, "
+            f"encipher_only={encipher_only}, decipher_only={decipher_only})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, KeyUsage):
+            return NotImplemented
+
+        return (
+            self.digital_signature == other.digital_signature
+            and self.content_commitment == other.content_commitment
+            and self.key_encipherment == other.key_encipherment
+            and self.data_encipherment == other.data_encipherment
+            and self.key_agreement == other.key_agreement
+            and self.key_cert_sign == other.key_cert_sign
+            and self.crl_sign == other.crl_sign
+            and self._encipher_only == other._encipher_only
+            and self._decipher_only == other._decipher_only
+        )
+
+    def __hash__(self) -> int:
+        return hash(
+            (
+                self.digital_signature,
+                self.content_commitment,
+                self.key_encipherment,
+                self.data_encipherment,
+                self.key_agreement,
+                self.key_cert_sign,
+                self.crl_sign,
+                self._encipher_only,
+                self._decipher_only,
+            )
+        )
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class PrivateKeyUsagePeriod(ExtensionType):
+    oid = ExtensionOID.PRIVATE_KEY_USAGE_PERIOD
+
+    def __init__(
+        self,
+        not_before: datetime.datetime | None,
+        not_after: datetime.datetime | None,
+    ) -> None:
+        if (
+            not isinstance(not_before, datetime.datetime)
+            and not_before is not None
+        ):
+            raise TypeError("not_before must be a datetime.datetime or None")
+
+        if (
+            not isinstance(not_after, datetime.datetime)
+            and not_after is not None
+        ):
+            raise TypeError("not_after must be a datetime.datetime or None")
+
+        if not_before is None and not_after is None:
+            raise ValueError(
+                "At least one of not_before and not_after must not be None"
+            )
+
+        if (
+            not_before is not None
+            and not_after is not None
+            and not_before > not_after
+        ):
+            raise ValueError("not_before must be before not_after")
+
+        self._not_before = not_before
+        self._not_after = not_after
+
+    @property
+    def not_before(self) -> datetime.datetime | None:
+        return self._not_before
+
+    @property
+    def not_after(self) -> datetime.datetime | None:
+        return self._not_after
+
+    def __repr__(self) -> str:
+        return (
+            f"<PrivateKeyUsagePeriod(not_before={self.not_before}, "
+            f"not_after={self.not_after})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, PrivateKeyUsagePeriod):
+            return NotImplemented
+
+        return (
+            self.not_before == other.not_before
+            and self.not_after == other.not_after
+        )
+
+    def __hash__(self) -> int:
+        return hash((self.not_before, self.not_after))
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class NameConstraints(ExtensionType):
+    oid = ExtensionOID.NAME_CONSTRAINTS
+
+    def __init__(
+        self,
+        permitted_subtrees: Iterable[GeneralName] | None,
+        excluded_subtrees: Iterable[GeneralName] | None,
+    ) -> None:
+        if permitted_subtrees is not None:
+            permitted_subtrees = list(permitted_subtrees)
+            if not permitted_subtrees:
+                raise ValueError(
+                    "permitted_subtrees must be a non-empty list or None"
+                )
+            if not all(isinstance(x, GeneralName) for x in permitted_subtrees):
+                raise TypeError(
+                    "permitted_subtrees must be a list of GeneralName objects "
+                    "or None"
+                )
+
+            self._validate_tree(permitted_subtrees)
+
+        if excluded_subtrees is not None:
+            excluded_subtrees = list(excluded_subtrees)
+            if not excluded_subtrees:
+                raise ValueError(
+                    "excluded_subtrees must be a non-empty list or None"
+                )
+            if not all(isinstance(x, GeneralName) for x in excluded_subtrees):
+                raise TypeError(
+                    "excluded_subtrees must be a list of GeneralName objects "
+                    "or None"
+                )
+
+            self._validate_tree(excluded_subtrees)
+
+        if permitted_subtrees is None and excluded_subtrees is None:
+            raise ValueError(
+                "At least one of permitted_subtrees and excluded_subtrees "
+                "must not be None"
+            )
+
+        self._permitted_subtrees = permitted_subtrees
+        self._excluded_subtrees = excluded_subtrees
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, NameConstraints):
+            return NotImplemented
+
+        return (
+            self.excluded_subtrees == other.excluded_subtrees
+            and self.permitted_subtrees == other.permitted_subtrees
+        )
+
+    def _validate_tree(self, tree: Iterable[GeneralName]) -> None:
+        self._validate_ip_name(tree)
+        self._validate_dns_name(tree)
+
+    def _validate_ip_name(self, tree: Iterable[GeneralName]) -> None:
+        if any(
+            isinstance(name, IPAddress)
+            and not isinstance(
+                name.value, (ipaddress.IPv4Network, ipaddress.IPv6Network)
+            )
+            for name in tree
+        ):
+            raise TypeError(
+                "IPAddress name constraints must be an IPv4Network or"
+                " IPv6Network object"
+            )
+
+    def _validate_dns_name(self, tree: Iterable[GeneralName]) -> None:
+        if any(
+            isinstance(name, DNSName) and "*" in name.value for name in tree
+        ):
+            raise ValueError(
+                "DNSName name constraints must not contain the '*' wildcard"
+                " character"
+            )
+
+    def __repr__(self) -> str:
+        return (
+            f"<NameConstraints(permitted_subtrees={self.permitted_subtrees}, "
+            f"excluded_subtrees={self.excluded_subtrees})>"
+        )
+
+    def __hash__(self) -> int:
+        if self.permitted_subtrees is not None:
+            ps: tuple[GeneralName, ...] | None = tuple(self.permitted_subtrees)
+        else:
+            ps = None
+
+        if self.excluded_subtrees is not None:
+            es: tuple[GeneralName, ...] | None = tuple(self.excluded_subtrees)
+        else:
+            es = None
+
+        return hash((ps, es))
+
+    @property
+    def permitted_subtrees(
+        self,
+    ) -> list[GeneralName] | None:
+        return self._permitted_subtrees
+
+    @property
+    def excluded_subtrees(
+        self,
+    ) -> list[GeneralName] | None:
+        return self._excluded_subtrees
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class Extension(typing.Generic[ExtensionTypeVar]):
+    def __init__(
+        self, oid: ObjectIdentifier, critical: bool, value: ExtensionTypeVar
+    ) -> None:
+        if not isinstance(oid, ObjectIdentifier):
+            raise TypeError(
+                "oid argument must be an ObjectIdentifier instance."
+            )
+
+        if not isinstance(critical, bool):
+            raise TypeError("critical must be a boolean value")
+
+        self._oid = oid
+        self._critical = critical
+        self._value = value
+
+    @property
+    def oid(self) -> ObjectIdentifier:
+        return self._oid
+
+    @property
+    def critical(self) -> bool:
+        return self._critical
+
+    @property
+    def value(self) -> ExtensionTypeVar:
+        return self._value
+
+    def __repr__(self) -> str:
+        return (
+            f"<Extension(oid={self.oid}, critical={self.critical}, "
+            f"value={self.value})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Extension):
+            return NotImplemented
+
+        return (
+            self.oid == other.oid
+            and self.critical == other.critical
+            and self.value == other.value
+        )
+
+    def __hash__(self) -> int:
+        return hash((self.oid, self.critical, self.value))
+
+
+class GeneralNames:
+    def __init__(self, general_names: Iterable[GeneralName]) -> None:
+        general_names = list(general_names)
+        if not all(isinstance(x, GeneralName) for x in general_names):
+            raise TypeError(
+                "Every item in the general_names list must be an "
+                "object conforming to the GeneralName interface"
+            )
+
+        self._general_names = general_names
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods("_general_names")
+
+    @typing.overload
+    def get_values_for_type(
+        self,
+        type: type[DNSName]
+        | type[UniformResourceIdentifier]
+        | type[RFC822Name],
+    ) -> list[str]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self,
+        type: type[DirectoryName],
+    ) -> list[Name]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self,
+        type: type[RegisteredID],
+    ) -> list[ObjectIdentifier]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self, type: type[IPAddress]
+    ) -> list[_IPAddressTypes]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self, type: type[OtherName]
+    ) -> list[OtherName]: ...
+
+    def get_values_for_type(
+        self,
+        type: type[DNSName]
+        | type[DirectoryName]
+        | type[IPAddress]
+        | type[OtherName]
+        | type[RFC822Name]
+        | type[RegisteredID]
+        | type[UniformResourceIdentifier],
+    ) -> (
+        list[_IPAddressTypes]
+        | list[str]
+        | list[OtherName]
+        | list[Name]
+        | list[ObjectIdentifier]
+    ):
+        # Return the value of each GeneralName, except for OtherName instances
+        # which we return directly because it has two important properties not
+        # just one value.
+        objs = (i for i in self if isinstance(i, type))
+        if type != OtherName:
+            return [i.value for i in objs]  # type: ignore[return-value,unused-ignore]
+        return list(objs)  # type: ignore[return-value,unused-ignore]
+
+    def __repr__(self) -> str:
+        return f"<GeneralNames({self._general_names})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, GeneralNames):
+            return NotImplemented
+
+        return self._general_names == other._general_names
+
+    def __hash__(self) -> int:
+        return hash(tuple(self._general_names))
+
+
+class SubjectAlternativeName(ExtensionType):
+    oid = ExtensionOID.SUBJECT_ALTERNATIVE_NAME
+
+    def __init__(self, general_names: Iterable[GeneralName]) -> None:
+        self._general_names = GeneralNames(general_names)
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods("_general_names")
+
+    @typing.overload
+    def get_values_for_type(
+        self,
+        type: type[DNSName]
+        | type[UniformResourceIdentifier]
+        | type[RFC822Name],
+    ) -> list[str]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self,
+        type: type[DirectoryName],
+    ) -> list[Name]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self,
+        type: type[RegisteredID],
+    ) -> list[ObjectIdentifier]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self, type: type[IPAddress]
+    ) -> list[_IPAddressTypes]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self, type: type[OtherName]
+    ) -> list[OtherName]: ...
+
+    def get_values_for_type(
+        self,
+        type: type[DNSName]
+        | type[DirectoryName]
+        | type[IPAddress]
+        | type[OtherName]
+        | type[RFC822Name]
+        | type[RegisteredID]
+        | type[UniformResourceIdentifier],
+    ) -> (
+        list[_IPAddressTypes]
+        | list[str]
+        | list[OtherName]
+        | list[Name]
+        | list[ObjectIdentifier]
+    ):
+        return self._general_names.get_values_for_type(type)
+
+    def __repr__(self) -> str:
+        return f"<SubjectAlternativeName({self._general_names})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SubjectAlternativeName):
+            return NotImplemented
+
+        return self._general_names == other._general_names
+
+    def __hash__(self) -> int:
+        return hash(self._general_names)
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class IssuerAlternativeName(ExtensionType):
+    oid = ExtensionOID.ISSUER_ALTERNATIVE_NAME
+
+    def __init__(self, general_names: Iterable[GeneralName]) -> None:
+        self._general_names = GeneralNames(general_names)
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods("_general_names")
+
+    @typing.overload
+    def get_values_for_type(
+        self,
+        type: type[DNSName]
+        | type[UniformResourceIdentifier]
+        | type[RFC822Name],
+    ) -> list[str]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self,
+        type: type[DirectoryName],
+    ) -> list[Name]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self,
+        type: type[RegisteredID],
+    ) -> list[ObjectIdentifier]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self, type: type[IPAddress]
+    ) -> list[_IPAddressTypes]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self, type: type[OtherName]
+    ) -> list[OtherName]: ...
+
+    def get_values_for_type(
+        self,
+        type: type[DNSName]
+        | type[DirectoryName]
+        | type[IPAddress]
+        | type[OtherName]
+        | type[RFC822Name]
+        | type[RegisteredID]
+        | type[UniformResourceIdentifier],
+    ) -> (
+        list[_IPAddressTypes]
+        | list[str]
+        | list[OtherName]
+        | list[Name]
+        | list[ObjectIdentifier]
+    ):
+        return self._general_names.get_values_for_type(type)
+
+    def __repr__(self) -> str:
+        return f"<IssuerAlternativeName({self._general_names})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, IssuerAlternativeName):
+            return NotImplemented
+
+        return self._general_names == other._general_names
+
+    def __hash__(self) -> int:
+        return hash(self._general_names)
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class CertificateIssuer(ExtensionType):
+    oid = CRLEntryExtensionOID.CERTIFICATE_ISSUER
+
+    def __init__(self, general_names: Iterable[GeneralName]) -> None:
+        self._general_names = GeneralNames(general_names)
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods("_general_names")
+
+    @typing.overload
+    def get_values_for_type(
+        self,
+        type: type[DNSName]
+        | type[UniformResourceIdentifier]
+        | type[RFC822Name],
+    ) -> list[str]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self,
+        type: type[DirectoryName],
+    ) -> list[Name]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self,
+        type: type[RegisteredID],
+    ) -> list[ObjectIdentifier]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self, type: type[IPAddress]
+    ) -> list[_IPAddressTypes]: ...
+
+    @typing.overload
+    def get_values_for_type(
+        self, type: type[OtherName]
+    ) -> list[OtherName]: ...
+
+    def get_values_for_type(
+        self,
+        type: type[DNSName]
+        | type[DirectoryName]
+        | type[IPAddress]
+        | type[OtherName]
+        | type[RFC822Name]
+        | type[RegisteredID]
+        | type[UniformResourceIdentifier],
+    ) -> (
+        list[_IPAddressTypes]
+        | list[str]
+        | list[OtherName]
+        | list[Name]
+        | list[ObjectIdentifier]
+    ):
+        return self._general_names.get_values_for_type(type)
+
+    def __repr__(self) -> str:
+        return f"<CertificateIssuer({self._general_names})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, CertificateIssuer):
+            return NotImplemented
+
+        return self._general_names == other._general_names
+
+    def __hash__(self) -> int:
+        return hash(self._general_names)
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class CRLReason(ExtensionType):
+    oid = CRLEntryExtensionOID.CRL_REASON
+
+    def __init__(self, reason: ReasonFlags) -> None:
+        if not isinstance(reason, ReasonFlags):
+            raise TypeError("reason must be an element from ReasonFlags")
+
+        self._reason = reason
+
+    def __repr__(self) -> str:
+        return f"<CRLReason(reason={self._reason})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, CRLReason):
+            return NotImplemented
+
+        return self.reason == other.reason
+
+    def __hash__(self) -> int:
+        return hash(self.reason)
+
+    @property
+    def reason(self) -> ReasonFlags:
+        return self._reason
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class InvalidityDate(ExtensionType):
+    oid = CRLEntryExtensionOID.INVALIDITY_DATE
+
+    def __init__(self, invalidity_date: datetime.datetime) -> None:
+        if not isinstance(invalidity_date, datetime.datetime):
+            raise TypeError("invalidity_date must be a datetime.datetime")
+
+        self._invalidity_date = invalidity_date
+
+    def __repr__(self) -> str:
+        return f"<InvalidityDate(invalidity_date={self._invalidity_date})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, InvalidityDate):
+            return NotImplemented
+
+        return self.invalidity_date == other.invalidity_date
+
+    def __hash__(self) -> int:
+        return hash(self.invalidity_date)
+
+    @property
+    def invalidity_date(self) -> datetime.datetime:
+        return self._invalidity_date
+
+    @property
+    def invalidity_date_utc(self) -> datetime.datetime:
+        if self._invalidity_date.tzinfo is None:
+            return self._invalidity_date.replace(tzinfo=datetime.timezone.utc)
+        else:
+            return self._invalidity_date.astimezone(tz=datetime.timezone.utc)
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class PrecertificateSignedCertificateTimestamps(ExtensionType):
+    oid = ExtensionOID.PRECERT_SIGNED_CERTIFICATE_TIMESTAMPS
+
+    def __init__(
+        self,
+        signed_certificate_timestamps: Iterable[SignedCertificateTimestamp],
+    ) -> None:
+        signed_certificate_timestamps = list(signed_certificate_timestamps)
+        if not all(
+            isinstance(sct, SignedCertificateTimestamp)
+            for sct in signed_certificate_timestamps
+        ):
+            raise TypeError(
+                "Every item in the signed_certificate_timestamps list must be "
+                "a SignedCertificateTimestamp"
+            )
+        self._signed_certificate_timestamps = signed_certificate_timestamps
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods(
+        "_signed_certificate_timestamps"
+    )
+
+    def __repr__(self) -> str:
+        return f"<PrecertificateSignedCertificateTimestamps({list(self)})>"
+
+    def __hash__(self) -> int:
+        return hash(tuple(self._signed_certificate_timestamps))
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, PrecertificateSignedCertificateTimestamps):
+            return NotImplemented
+
+        return (
+            self._signed_certificate_timestamps
+            == other._signed_certificate_timestamps
+        )
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class SignedCertificateTimestamps(ExtensionType):
+    oid = ExtensionOID.SIGNED_CERTIFICATE_TIMESTAMPS
+
+    def __init__(
+        self,
+        signed_certificate_timestamps: Iterable[SignedCertificateTimestamp],
+    ) -> None:
+        signed_certificate_timestamps = list(signed_certificate_timestamps)
+        if not all(
+            isinstance(sct, SignedCertificateTimestamp)
+            for sct in signed_certificate_timestamps
+        ):
+            raise TypeError(
+                "Every item in the signed_certificate_timestamps list must be "
+                "a SignedCertificateTimestamp"
+            )
+        self._signed_certificate_timestamps = signed_certificate_timestamps
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods(
+        "_signed_certificate_timestamps"
+    )
+
+    def __repr__(self) -> str:
+        return f"<SignedCertificateTimestamps({list(self)})>"
+
+    def __hash__(self) -> int:
+        return hash(tuple(self._signed_certificate_timestamps))
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SignedCertificateTimestamps):
+            return NotImplemented
+
+        return (
+            self._signed_certificate_timestamps
+            == other._signed_certificate_timestamps
+        )
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class OCSPNonce(ExtensionType):
+    oid = OCSPExtensionOID.NONCE
+
+    def __init__(self, nonce: bytes) -> None:
+        if not isinstance(nonce, bytes):
+            raise TypeError("nonce must be bytes")
+
+        self._nonce = nonce
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, OCSPNonce):
+            return NotImplemented
+
+        return self.nonce == other.nonce
+
+    def __hash__(self) -> int:
+        return hash(self.nonce)
+
+    def __repr__(self) -> str:
+        return f"<OCSPNonce(nonce={self.nonce!r})>"
+
+    @property
+    def nonce(self) -> bytes:
+        return self._nonce
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class OCSPAcceptableResponses(ExtensionType):
+    oid = OCSPExtensionOID.ACCEPTABLE_RESPONSES
+
+    def __init__(self, responses: Iterable[ObjectIdentifier]) -> None:
+        responses = list(responses)
+        if any(not isinstance(r, ObjectIdentifier) for r in responses):
+            raise TypeError("All responses must be ObjectIdentifiers")
+
+        self._responses = responses
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, OCSPAcceptableResponses):
+            return NotImplemented
+
+        return self._responses == other._responses
+
+    def __hash__(self) -> int:
+        return hash(tuple(self._responses))
+
+    def __repr__(self) -> str:
+        return f"<OCSPAcceptableResponses(responses={self._responses})>"
+
+    def __iter__(self) -> Iterator[ObjectIdentifier]:
+        return iter(self._responses)
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class IssuingDistributionPoint(ExtensionType):
+    oid = ExtensionOID.ISSUING_DISTRIBUTION_POINT
+
+    def __init__(
+        self,
+        full_name: Iterable[GeneralName] | None,
+        relative_name: RelativeDistinguishedName | None,
+        only_contains_user_certs: bool,
+        only_contains_ca_certs: bool,
+        only_some_reasons: frozenset[ReasonFlags] | None,
+        indirect_crl: bool,
+        only_contains_attribute_certs: bool,
+    ) -> None:
+        if full_name is not None:
+            full_name = list(full_name)
+
+        if only_some_reasons and (
+            not isinstance(only_some_reasons, frozenset)
+            or not all(isinstance(x, ReasonFlags) for x in only_some_reasons)
+        ):
+            raise TypeError(
+                "only_some_reasons must be None or frozenset of ReasonFlags"
+            )
+
+        if only_some_reasons and (
+            ReasonFlags.unspecified in only_some_reasons
+            or ReasonFlags.remove_from_crl in only_some_reasons
+        ):
+            raise ValueError(
+                "unspecified and remove_from_crl are not valid reasons in an "
+                "IssuingDistributionPoint"
+            )
+
+        if not (
+            isinstance(only_contains_user_certs, bool)
+            and isinstance(only_contains_ca_certs, bool)
+            and isinstance(indirect_crl, bool)
+            and isinstance(only_contains_attribute_certs, bool)
+        ):
+            raise TypeError(
+                "only_contains_user_certs, only_contains_ca_certs, "
+                "indirect_crl and only_contains_attribute_certs "
+                "must all be boolean."
+            )
+
+        # Per RFC5280 Section 5.2.5, the Issuing Distribution Point extension
+        # in a CRL can have only one of onlyContainsUserCerts,
+        # onlyContainsCACerts, onlyContainsAttributeCerts set to TRUE.
+        crl_constraints = [
+            only_contains_user_certs,
+            only_contains_ca_certs,
+            only_contains_attribute_certs,
+        ]
+
+        if len([x for x in crl_constraints if x]) > 1:
+            raise ValueError(
+                "Only one of the following can be set to True: "
+                "only_contains_user_certs, only_contains_ca_certs, "
+                "only_contains_attribute_certs"
+            )
+
+        if not any(
+            [
+                only_contains_user_certs,
+                only_contains_ca_certs,
+                indirect_crl,
+                only_contains_attribute_certs,
+                full_name,
+                relative_name,
+                only_some_reasons,
+            ]
+        ):
+            raise ValueError(
+                "Cannot create empty extension: "
+                "if only_contains_user_certs, only_contains_ca_certs, "
+                "indirect_crl, and only_contains_attribute_certs are all False"
+                ", then either full_name, relative_name, or only_some_reasons "
+                "must have a value."
+            )
+
+        self._only_contains_user_certs = only_contains_user_certs
+        self._only_contains_ca_certs = only_contains_ca_certs
+        self._indirect_crl = indirect_crl
+        self._only_contains_attribute_certs = only_contains_attribute_certs
+        self._only_some_reasons = only_some_reasons
+        self._full_name = full_name
+        self._relative_name = relative_name
+
+    def __repr__(self) -> str:
+        return (
+            f"<IssuingDistributionPoint(full_name={self.full_name}, "
+            f"relative_name={self.relative_name}, "
+            f"only_contains_user_certs={self.only_contains_user_certs}, "
+            f"only_contains_ca_certs={self.only_contains_ca_certs}, "
+            f"only_some_reasons={self.only_some_reasons}, "
+            f"indirect_crl={self.indirect_crl}, "
+            "only_contains_attribute_certs="
+            f"{self.only_contains_attribute_certs})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, IssuingDistributionPoint):
+            return NotImplemented
+
+        return (
+            self.full_name == other.full_name
+            and self.relative_name == other.relative_name
+            and self.only_contains_user_certs == other.only_contains_user_certs
+            and self.only_contains_ca_certs == other.only_contains_ca_certs
+            and self.only_some_reasons == other.only_some_reasons
+            and self.indirect_crl == other.indirect_crl
+            and self.only_contains_attribute_certs
+            == other.only_contains_attribute_certs
+        )
+
+    def __hash__(self) -> int:
+        if self.full_name is not None:
+            full_name: tuple[GeneralName, ...] | None = tuple(self.full_name)
+        else:
+            full_name = None
+
+        return hash(
+            (
+                full_name,
+                self.relative_name,
+                self.only_contains_user_certs,
+                self.only_contains_ca_certs,
+                self.only_some_reasons,
+                self.indirect_crl,
+                self.only_contains_attribute_certs,
+            )
+        )
+
+    @property
+    def full_name(self) -> list[GeneralName] | None:
+        return self._full_name
+
+    @property
+    def relative_name(self) -> RelativeDistinguishedName | None:
+        return self._relative_name
+
+    @property
+    def only_contains_user_certs(self) -> bool:
+        return self._only_contains_user_certs
+
+    @property
+    def only_contains_ca_certs(self) -> bool:
+        return self._only_contains_ca_certs
+
+    @property
+    def only_some_reasons(
+        self,
+    ) -> frozenset[ReasonFlags] | None:
+        return self._only_some_reasons
+
+    @property
+    def indirect_crl(self) -> bool:
+        return self._indirect_crl
+
+    @property
+    def only_contains_attribute_certs(self) -> bool:
+        return self._only_contains_attribute_certs
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class MSCertificateTemplate(ExtensionType):
+    oid = ExtensionOID.MS_CERTIFICATE_TEMPLATE
+
+    def __init__(
+        self,
+        template_id: ObjectIdentifier,
+        major_version: int | None,
+        minor_version: int | None,
+    ) -> None:
+        if not isinstance(template_id, ObjectIdentifier):
+            raise TypeError("oid must be an ObjectIdentifier")
+        self._template_id = template_id
+        if (
+            major_version is not None and not isinstance(major_version, int)
+        ) or (
+            minor_version is not None and not isinstance(minor_version, int)
+        ):
+            raise TypeError(
+                "major_version and minor_version must be integers or None"
+            )
+        self._major_version = major_version
+        self._minor_version = minor_version
+
+    @property
+    def template_id(self) -> ObjectIdentifier:
+        return self._template_id
+
+    @property
+    def major_version(self) -> int | None:
+        return self._major_version
+
+    @property
+    def minor_version(self) -> int | None:
+        return self._minor_version
+
+    def __repr__(self) -> str:
+        return (
+            f"<MSCertificateTemplate(template_id={self.template_id}, "
+            f"major_version={self.major_version}, "
+            f"minor_version={self.minor_version})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, MSCertificateTemplate):
+            return NotImplemented
+
+        return (
+            self.template_id == other.template_id
+            and self.major_version == other.major_version
+            and self.minor_version == other.minor_version
+        )
+
+    def __hash__(self) -> int:
+        return hash((self.template_id, self.major_version, self.minor_version))
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class NamingAuthority:
+    def __init__(
+        self,
+        id: ObjectIdentifier | None,
+        url: str | None,
+        text: str | None,
+    ) -> None:
+        if id is not None and not isinstance(id, ObjectIdentifier):
+            raise TypeError("id must be an ObjectIdentifier")
+
+        if url is not None and not isinstance(url, str):
+            raise TypeError("url must be a str")
+
+        if text is not None and not isinstance(text, str):
+            raise TypeError("text must be a str")
+
+        self._id = id
+        self._url = url
+        self._text = text
+
+    @property
+    def id(self) -> ObjectIdentifier | None:
+        return self._id
+
+    @property
+    def url(self) -> str | None:
+        return self._url
+
+    @property
+    def text(self) -> str | None:
+        return self._text
+
+    def __repr__(self) -> str:
+        return (
+            f"<NamingAuthority("
+            f"id={self.id}, url={self.url}, text={self.text})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, NamingAuthority):
+            return NotImplemented
+
+        return (
+            self.id == other.id
+            and self.url == other.url
+            and self.text == other.text
+        )
+
+    def __hash__(self) -> int:
+        return hash(
+            (
+                self.id,
+                self.url,
+                self.text,
+            )
+        )
+
+
+class ProfessionInfo:
+    def __init__(
+        self,
+        naming_authority: NamingAuthority | None,
+        profession_items: Iterable[str],
+        profession_oids: Iterable[ObjectIdentifier] | None,
+        registration_number: str | None,
+        add_profession_info: bytes | None,
+    ) -> None:
+        if naming_authority is not None and not isinstance(
+            naming_authority, NamingAuthority
+        ):
+            raise TypeError("naming_authority must be a NamingAuthority")
+
+        profession_items = list(profession_items)
+        if not all(isinstance(item, str) for item in profession_items):
+            raise TypeError(
+                "Every item in the profession_items list must be a str"
+            )
+
+        if profession_oids is not None:
+            profession_oids = list(profession_oids)
+            if not all(
+                isinstance(oid, ObjectIdentifier) for oid in profession_oids
+            ):
+                raise TypeError(
+                    "Every item in the profession_oids list must be an "
+                    "ObjectIdentifier"
+                )
+
+        if registration_number is not None and not isinstance(
+            registration_number, str
+        ):
+            raise TypeError("registration_number must be a str")
+
+        if add_profession_info is not None and not isinstance(
+            add_profession_info, bytes
+        ):
+            raise TypeError("add_profession_info must be bytes")
+
+        self._naming_authority = naming_authority
+        self._profession_items = profession_items
+        self._profession_oids = profession_oids
+        self._registration_number = registration_number
+        self._add_profession_info = add_profession_info
+
+    @property
+    def naming_authority(self) -> NamingAuthority | None:
+        return self._naming_authority
+
+    @property
+    def profession_items(self) -> list[str]:
+        return self._profession_items
+
+    @property
+    def profession_oids(self) -> list[ObjectIdentifier] | None:
+        return self._profession_oids
+
+    @property
+    def registration_number(self) -> str | None:
+        return self._registration_number
+
+    @property
+    def add_profession_info(self) -> bytes | None:
+        return self._add_profession_info
+
+    def __repr__(self) -> str:
+        return (
+            f"<ProfessionInfo(naming_authority={self.naming_authority}, "
+            f"profession_items={self.profession_items}, "
+            f"profession_oids={self.profession_oids}, "
+            f"registration_number={self.registration_number}, "
+            f"add_profession_info={self.add_profession_info!r})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, ProfessionInfo):
+            return NotImplemented
+
+        return (
+            self.naming_authority == other.naming_authority
+            and self.profession_items == other.profession_items
+            and self.profession_oids == other.profession_oids
+            and self.registration_number == other.registration_number
+            and self.add_profession_info == other.add_profession_info
+        )
+
+    def __hash__(self) -> int:
+        if self.profession_oids is not None:
+            profession_oids = tuple(self.profession_oids)
+        else:
+            profession_oids = None
+        return hash(
+            (
+                self.naming_authority,
+                tuple(self.profession_items),
+                profession_oids,
+                self.registration_number,
+                self.add_profession_info,
+            )
+        )
+
+
+class Admission:
+    def __init__(
+        self,
+        admission_authority: GeneralName | None,
+        naming_authority: NamingAuthority | None,
+        profession_infos: Iterable[ProfessionInfo],
+    ) -> None:
+        if admission_authority is not None and not isinstance(
+            admission_authority, GeneralName
+        ):
+            raise TypeError("admission_authority must be a GeneralName")
+
+        if naming_authority is not None and not isinstance(
+            naming_authority, NamingAuthority
+        ):
+            raise TypeError("naming_authority must be a NamingAuthority")
+
+        profession_infos = list(profession_infos)
+        if not all(
+            isinstance(info, ProfessionInfo) for info in profession_infos
+        ):
+            raise TypeError(
+                "Every item in the profession_infos list must be a "
+                "ProfessionInfo"
+            )
+
+        self._admission_authority = admission_authority
+        self._naming_authority = naming_authority
+        self._profession_infos = profession_infos
+
+    @property
+    def admission_authority(self) -> GeneralName | None:
+        return self._admission_authority
+
+    @property
+    def naming_authority(self) -> NamingAuthority | None:
+        return self._naming_authority
+
+    @property
+    def profession_infos(self) -> list[ProfessionInfo]:
+        return self._profession_infos
+
+    def __repr__(self) -> str:
+        return (
+            f"<Admission(admission_authority={self.admission_authority}, "
+            f"naming_authority={self.naming_authority}, "
+            f"profession_infos={self.profession_infos})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Admission):
+            return NotImplemented
+
+        return (
+            self.admission_authority == other.admission_authority
+            and self.naming_authority == other.naming_authority
+            and self.profession_infos == other.profession_infos
+        )
+
+    def __hash__(self) -> int:
+        return hash(
+            (
+                self.admission_authority,
+                self.naming_authority,
+                tuple(self.profession_infos),
+            )
+        )
+
+
+class Admissions(ExtensionType):
+    oid = ExtensionOID.ADMISSIONS
+
+    def __init__(
+        self,
+        authority: GeneralName | None,
+        admissions: Iterable[Admission],
+    ) -> None:
+        if authority is not None and not isinstance(authority, GeneralName):
+            raise TypeError("authority must be a GeneralName")
+
+        admissions = list(admissions)
+        if not all(
+            isinstance(admission, Admission) for admission in admissions
+        ):
+            raise TypeError(
+                "Every item in the contents_of_admissions list must be an "
+                "Admission"
+            )
+
+        self._authority = authority
+        self._admissions = admissions
+
+    __len__, __iter__, __getitem__ = _make_sequence_methods("_admissions")
+
+    @property
+    def authority(self) -> GeneralName | None:
+        return self._authority
+
+    def __repr__(self) -> str:
+        return (
+            f"<Admissions(authority={self._authority}, "
+            f"admissions={self._admissions})>"
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Admissions):
+            return NotImplemented
+
+        return (
+            self.authority == other.authority
+            and self._admissions == other._admissions
+        )
+
+    def __hash__(self) -> int:
+        return hash((self.authority, tuple(self._admissions)))
+
+    def public_bytes(self) -> bytes:
+        return rust_x509.encode_extension_value(self)
+
+
+class UnrecognizedExtension(ExtensionType):
+    def __init__(self, oid: ObjectIdentifier, value: bytes) -> None:
+        if not isinstance(oid, ObjectIdentifier):
+            raise TypeError("oid must be an ObjectIdentifier")
+        self._oid = oid
+        self._value = value
+
+    @property
+    def oid(self) -> ObjectIdentifier:  # type: ignore[override]
+        return self._oid
+
+    @property
+    def value(self) -> bytes:
+        return self._value
+
+    def __repr__(self) -> str:
+        return f"<UnrecognizedExtension(oid={self.oid}, value={self.value!r})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, UnrecognizedExtension):
+            return NotImplemented
+
+        return self.oid == other.oid and self.value == other.value
+
+    def __hash__(self) -> int:
+        return hash((self.oid, self.value))
+
+    def public_bytes(self) -> bytes:
+        return self.value

.mcp-venv/lib/python3.13/site-packages/cryptography/x509/general_name.py

@@ -0,0 +1,281 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import abc
+import ipaddress
+import typing
+from email.utils import parseaddr
+
+from cryptography.x509.name import Name
+from cryptography.x509.oid import ObjectIdentifier
+
+_IPAddressTypes = typing.Union[
+    ipaddress.IPv4Address,
+    ipaddress.IPv6Address,
+    ipaddress.IPv4Network,
+    ipaddress.IPv6Network,
+]
+
+
+class UnsupportedGeneralNameType(Exception):
+    pass
+
+
+class GeneralName(metaclass=abc.ABCMeta):
+    @property
+    @abc.abstractmethod
+    def value(self) -> typing.Any:
+        """
+        Return the value of the object
+        """
+
+
+class RFC822Name(GeneralName):
+    def __init__(self, value: str) -> None:
+        if isinstance(value, str):
+            try:
+                value.encode("ascii")
+            except UnicodeEncodeError:
+                raise ValueError(
+                    "RFC822Name values should be passed as an A-label string. "
+                    "This means unicode characters should be encoded via "
+                    "a library like idna."
+                )
+        else:
+            raise TypeError("value must be string")
+
+        name, address = parseaddr(value)
+        if name or not address:
+            # parseaddr has found a name (e.g. Name <email>) or the entire
+            # value is an empty string.
+            raise ValueError("Invalid rfc822name value")
+
+        self._value = value
+
+    @property
+    def value(self) -> str:
+        return self._value
+
+    @classmethod
+    def _init_without_validation(cls, value: str) -> RFC822Name:
+        instance = cls.__new__(cls)
+        instance._value = value
+        return instance
+
+    def __repr__(self) -> str:
+        return f"<RFC822Name(value={self.value!r})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, RFC822Name):
+            return NotImplemented
+
+        return self.value == other.value
+
+    def __hash__(self) -> int:
+        return hash(self.value)
+
+
+class DNSName(GeneralName):
+    def __init__(self, value: str) -> None:
+        if isinstance(value, str):
+            try:
+                value.encode("ascii")
+            except UnicodeEncodeError:
+                raise ValueError(
+                    "DNSName values should be passed as an A-label string. "
+                    "This means unicode characters should be encoded via "
+                    "a library like idna."
+                )
+        else:
+            raise TypeError("value must be string")
+
+        self._value = value
+
+    @property
+    def value(self) -> str:
+        return self._value
+
+    @classmethod
+    def _init_without_validation(cls, value: str) -> DNSName:
+        instance = cls.__new__(cls)
+        instance._value = value
+        return instance
+
+    def __repr__(self) -> str:
+        return f"<DNSName(value={self.value!r})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, DNSName):
+            return NotImplemented
+
+        return self.value == other.value
+
+    def __hash__(self) -> int:
+        return hash(self.value)
+
+
+class UniformResourceIdentifier(GeneralName):
+    def __init__(self, value: str) -> None:
+        if isinstance(value, str):
+            try:
+                value.encode("ascii")
+            except UnicodeEncodeError:
+                raise ValueError(
+                    "URI values should be passed as an A-label string. "
+                    "This means unicode characters should be encoded via "
+                    "a library like idna."
+                )
+        else:
+            raise TypeError("value must be string")
+
+        self._value = value
+
+    @property
+    def value(self) -> str:
+        return self._value
+
+    @classmethod
+    def _init_without_validation(cls, value: str) -> UniformResourceIdentifier:
+        instance = cls.__new__(cls)
+        instance._value = value
+        return instance
+
+    def __repr__(self) -> str:
+        return f"<UniformResourceIdentifier(value={self.value!r})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, UniformResourceIdentifier):
+            return NotImplemented
+
+        return self.value == other.value
+
+    def __hash__(self) -> int:
+        return hash(self.value)
+
+
+class DirectoryName(GeneralName):
+    def __init__(self, value: Name) -> None:
+        if not isinstance(value, Name):
+            raise TypeError("value must be a Name")
+
+        self._value = value
+
+    @property
+    def value(self) -> Name:
+        return self._value
+
+    def __repr__(self) -> str:
+        return f"<DirectoryName(value={self.value})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, DirectoryName):
+            return NotImplemented
+
+        return self.value == other.value
+
+    def __hash__(self) -> int:
+        return hash(self.value)
+
+
+class RegisteredID(GeneralName):
+    def __init__(self, value: ObjectIdentifier) -> None:
+        if not isinstance(value, ObjectIdentifier):
+            raise TypeError("value must be an ObjectIdentifier")
+
+        self._value = value
+
+    @property
+    def value(self) -> ObjectIdentifier:
+        return self._value
+
+    def __repr__(self) -> str:
+        return f"<RegisteredID(value={self.value})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, RegisteredID):
+            return NotImplemented
+
+        return self.value == other.value
+
+    def __hash__(self) -> int:
+        return hash(self.value)
+
+
+class IPAddress(GeneralName):
+    def __init__(self, value: _IPAddressTypes) -> None:
+        if not isinstance(
+            value,
+            (
+                ipaddress.IPv4Address,
+                ipaddress.IPv6Address,
+                ipaddress.IPv4Network,
+                ipaddress.IPv6Network,
+            ),
+        ):
+            raise TypeError(
+                "value must be an instance of ipaddress.IPv4Address, "
+                "ipaddress.IPv6Address, ipaddress.IPv4Network, or "
+                "ipaddress.IPv6Network"
+            )
+
+        self._value = value
+
+    @property
+    def value(self) -> _IPAddressTypes:
+        return self._value
+
+    def _packed(self) -> bytes:
+        if isinstance(
+            self.value, (ipaddress.IPv4Address, ipaddress.IPv6Address)
+        ):
+            return self.value.packed
+        else:
+            return (
+                self.value.network_address.packed + self.value.netmask.packed
+            )
+
+    def __repr__(self) -> str:
+        return f"<IPAddress(value={self.value})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, IPAddress):
+            return NotImplemented
+
+        return self.value == other.value
+
+    def __hash__(self) -> int:
+        return hash(self.value)
+
+
+class OtherName(GeneralName):
+    def __init__(self, type_id: ObjectIdentifier, value: bytes) -> None:
+        if not isinstance(type_id, ObjectIdentifier):
+            raise TypeError("type_id must be an ObjectIdentifier")
+        if not isinstance(value, bytes):
+            raise TypeError("value must be a binary string")
+
+        self._type_id = type_id
+        self._value = value
+
+    @property
+    def type_id(self) -> ObjectIdentifier:
+        return self._type_id
+
+    @property
+    def value(self) -> bytes:
+        return self._value
+
+    def __repr__(self) -> str:
+        return f"<OtherName(type_id={self.type_id}, value={self.value!r})>"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, OtherName):
+            return NotImplemented
+
+        return self.type_id == other.type_id and self.value == other.value
+
+    def __hash__(self) -> int:
+        return hash((self.type_id, self.value))

.mcp-venv/lib/python3.13/site-packages/cryptography/x509/name.py

@@ -0,0 +1,489 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import binascii
+import re
+import sys
+import typing
+import warnings
+from collections.abc import Iterable, Iterator
+
+from cryptography import utils
+from cryptography.hazmat.bindings._rust import x509 as rust_x509
+from cryptography.x509.oid import NameOID, ObjectIdentifier
+
+
+class _ASN1Type(utils.Enum):
+    BitString = 3
+    OctetString = 4
+    UTF8String = 12
+    NumericString = 18
+    PrintableString = 19
+    T61String = 20
+    IA5String = 22
+    UTCTime = 23
+    GeneralizedTime = 24
+    VisibleString = 26
+    UniversalString = 28
+    BMPString = 30
+
+
+_ASN1_TYPE_TO_ENUM = {i.value: i for i in _ASN1Type}
+_NAMEOID_DEFAULT_TYPE: dict[ObjectIdentifier, _ASN1Type] = {
+    NameOID.COUNTRY_NAME: _ASN1Type.PrintableString,
+    NameOID.JURISDICTION_COUNTRY_NAME: _ASN1Type.PrintableString,
+    NameOID.SERIAL_NUMBER: _ASN1Type.PrintableString,
+    NameOID.DN_QUALIFIER: _ASN1Type.PrintableString,
+    NameOID.EMAIL_ADDRESS: _ASN1Type.IA5String,
+    NameOID.DOMAIN_COMPONENT: _ASN1Type.IA5String,
+}
+
+# Type alias
+_OidNameMap = typing.Mapping[ObjectIdentifier, str]
+_NameOidMap = typing.Mapping[str, ObjectIdentifier]
+
+#: Short attribute names from RFC 4514:
+#: https://tools.ietf.org/html/rfc4514#page-7
+_NAMEOID_TO_NAME: _OidNameMap = {
+    NameOID.COMMON_NAME: "CN",
+    NameOID.LOCALITY_NAME: "L",
+    NameOID.STATE_OR_PROVINCE_NAME: "ST",
+    NameOID.ORGANIZATION_NAME: "O",
+    NameOID.ORGANIZATIONAL_UNIT_NAME: "OU",
+    NameOID.COUNTRY_NAME: "C",
+    NameOID.STREET_ADDRESS: "STREET",
+    NameOID.DOMAIN_COMPONENT: "DC",
+    NameOID.USER_ID: "UID",
+}
+_NAME_TO_NAMEOID = {v: k for k, v in _NAMEOID_TO_NAME.items()}
+
+_NAMEOID_LENGTH_LIMIT = {
+    NameOID.COUNTRY_NAME: (2, 2),
+    NameOID.JURISDICTION_COUNTRY_NAME: (2, 2),
+    NameOID.COMMON_NAME: (1, 64),
+}
+
+
+def _escape_dn_value(val: str | bytes) -> str:
+    """Escape special characters in RFC4514 Distinguished Name value."""
+
+    if not val:
+        return ""
+
+    # RFC 4514 Section 2.4 defines the value as being the # (U+0023) character
+    # followed by the hexadecimal encoding of the octets.
+    if isinstance(val, bytes):
+        return "#" + binascii.hexlify(val).decode("utf8")
+
+    # See https://tools.ietf.org/html/rfc4514#section-2.4
+    val = val.replace("\\", "\\\\")
+    val = val.replace('"', '\\"')
+    val = val.replace("+", "\\+")
+    val = val.replace(",", "\\,")
+    val = val.replace(";", "\\;")
+    val = val.replace("<", "\\<")
+    val = val.replace(">", "\\>")
+    val = val.replace("\0", "\\00")
+
+    if val[0] == "#" or (val[0] == " " and len(val) > 1):
+        val = "\\" + val
+    if val[-1] == " ":
+        val = val[:-1] + "\\ "
+
+    return val
+
+
+def _unescape_dn_value(val: str) -> str:
+    if not val:
+        return ""
+
+    # See https://tools.ietf.org/html/rfc4514#section-3
+
+    # special = escaped / SPACE / SHARP / EQUALS
+    # escaped = DQUOTE / PLUS / COMMA / SEMI / LANGLE / RANGLE
+    def sub(m):
+        val = m.group(0)
+        # Special character escape
+        if len(val) == 2:
+            return val[1:]
+
+        # Unicode string of hex
+        return binascii.unhexlify(val.replace("\\", "")).decode()
+
+    return _RFC4514NameParser._PAIR_MULTI_RE.sub(sub, val)
+
+
+NameAttributeValueType = typing.TypeVar(
+    "NameAttributeValueType",
+    typing.Union[str, bytes],
+    str,
+    bytes,
+    covariant=True,
+)
+
+
+class NameAttribute(typing.Generic[NameAttributeValueType]):
+    def __init__(
+        self,
+        oid: ObjectIdentifier,
+        value: NameAttributeValueType,
+        _type: _ASN1Type | None = None,
+        *,
+        _validate: bool = True,
+    ) -> None:
+        if not isinstance(oid, ObjectIdentifier):
+            raise TypeError(
+                "oid argument must be an ObjectIdentifier instance."
+            )
+        if _type == _ASN1Type.BitString:
+            if oid != NameOID.X500_UNIQUE_IDENTIFIER:
+                raise TypeError(
+                    "oid must be X500_UNIQUE_IDENTIFIER for BitString type."
+                )
+            if not isinstance(value, bytes):
+                raise TypeError("value must be bytes for BitString")
+        elif not isinstance(value, str):
+            raise TypeError("value argument must be a str")
+
+        length_limits = _NAMEOID_LENGTH_LIMIT.get(oid)
+        if length_limits is not None:
+            min_length, max_length = length_limits
+            assert isinstance(value, str)
+            c_len = len(value.encode("utf8"))
+            if c_len < min_length or c_len > max_length:
+                msg = (
+                    f"Attribute's length must be >= {min_length} and "
+                    f"<= {max_length}, but it was {c_len}"
+                )
+                if _validate is True:
+                    raise ValueError(msg)
+                else:
+                    warnings.warn(msg, stacklevel=2)
+
+        # The appropriate ASN1 string type varies by OID and is defined across
+        # multiple RFCs including 2459, 3280, and 5280. In general UTF8String
+        # is preferred (2459), but 3280 and 5280 specify several OIDs with
+        # alternate types. This means when we see the sentinel value we need
+        # to look up whether the OID has a non-UTF8 type. If it does, set it
+        # to that. Otherwise, UTF8!
+        if _type is None:
+            _type = _NAMEOID_DEFAULT_TYPE.get(oid, _ASN1Type.UTF8String)
+
+        if not isinstance(_type, _ASN1Type):
+            raise TypeError("_type must be from the _ASN1Type enum")
+
+        self._oid = oid
+        self._value: NameAttributeValueType = value
+        self._type: _ASN1Type = _type
+
+    @property
+    def oid(self) -> ObjectIdentifier:
+        return self._oid
+
+    @property
+    def value(self) -> NameAttributeValueType:
+        return self._value
+
+    @property
+    def rfc4514_attribute_name(self) -> str:
+        """
+        The short attribute name (for example "CN") if available,
+        otherwise the OID dotted string.
+        """
+        return _NAMEOID_TO_NAME.get(self.oid, self.oid.dotted_string)
+
+    def rfc4514_string(
+        self, attr_name_overrides: _OidNameMap | None = None
+    ) -> str:
+        """
+        Format as RFC4514 Distinguished Name string.
+
+        Use short attribute name if available, otherwise fall back to OID
+        dotted string.
+        """
+        attr_name = (
+            attr_name_overrides.get(self.oid) if attr_name_overrides else None
+        )
+        if attr_name is None:
+            attr_name = self.rfc4514_attribute_name
+
+        return f"{attr_name}={_escape_dn_value(self.value)}"
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, NameAttribute):
+            return NotImplemented
+
+        return self.oid == other.oid and self.value == other.value
+
+    def __hash__(self) -> int:
+        return hash((self.oid, self.value))
+
+    def __repr__(self) -> str:
+        return f"<NameAttribute(oid={self.oid}, value={self.value!r})>"
+
+
+class RelativeDistinguishedName:
+    def __init__(self, attributes: Iterable[NameAttribute[str | bytes]]):
+        attributes = list(attributes)
+        if not attributes:
+            raise ValueError("a relative distinguished name cannot be empty")
+        if not all(isinstance(x, NameAttribute) for x in attributes):
+            raise TypeError("attributes must be an iterable of NameAttribute")
+
+        # Keep list and frozenset to preserve attribute order where it matters
+        self._attributes = attributes
+        self._attribute_set = frozenset(attributes)
+
+        if len(self._attribute_set) != len(attributes):
+            raise ValueError("duplicate attributes are not allowed")
+
+    def get_attributes_for_oid(
+        self,
+        oid: ObjectIdentifier,
+    ) -> list[NameAttribute[str | bytes]]:
+        return [i for i in self if i.oid == oid]
+
+    def rfc4514_string(
+        self, attr_name_overrides: _OidNameMap | None = None
+    ) -> str:
+        """
+        Format as RFC4514 Distinguished Name string.
+
+        Within each RDN, attributes are joined by '+', although that is rarely
+        used in certificates.
+        """
+        return "+".join(
+            attr.rfc4514_string(attr_name_overrides)
+            for attr in self._attributes
+        )
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, RelativeDistinguishedName):
+            return NotImplemented
+
+        return self._attribute_set == other._attribute_set
+
+    def __hash__(self) -> int:
+        return hash(self._attribute_set)
+
+    def __iter__(self) -> Iterator[NameAttribute[str | bytes]]:
+        return iter(self._attributes)
+
+    def __len__(self) -> int:
+        return len(self._attributes)
+
+    def __repr__(self) -> str:
+        return f"<RelativeDistinguishedName({self.rfc4514_string()})>"
+
+
+class Name:
+    @typing.overload
+    def __init__(
+        self, attributes: Iterable[NameAttribute[str | bytes]]
+    ) -> None: ...
+
+    @typing.overload
+    def __init__(
+        self, attributes: Iterable[RelativeDistinguishedName]
+    ) -> None: ...
+
+    def __init__(
+        self,
+        attributes: Iterable[
+            NameAttribute[str | bytes] | RelativeDistinguishedName
+        ],
+    ) -> None:
+        attributes = list(attributes)
+        if all(isinstance(x, NameAttribute) for x in attributes):
+            self._attributes = [
+                RelativeDistinguishedName([typing.cast(NameAttribute, x)])
+                for x in attributes
+            ]
+        elif all(isinstance(x, RelativeDistinguishedName) for x in attributes):
+            self._attributes = typing.cast(
+                list[RelativeDistinguishedName], attributes
+            )
+        else:
+            raise TypeError(
+                "attributes must be a list of NameAttribute"
+                " or a list RelativeDistinguishedName"
+            )
+
+    @classmethod
+    def from_rfc4514_string(
+        cls,
+        data: str,
+        attr_name_overrides: _NameOidMap | None = None,
+    ) -> Name:
+        return _RFC4514NameParser(data, attr_name_overrides or {}).parse()
+
+    @classmethod
+    def from_bytes(cls, data: bytes) -> Name:
+        """
+        Parse a DER encoded X.509 name (the inverse of ``public_bytes``).
+        """
+        return rust_x509.parse_name_bytes(data)
+
+    def rfc4514_string(
+        self, attr_name_overrides: _OidNameMap | None = None
+    ) -> str:
+        """
+        Format as RFC4514 Distinguished Name string.
+        For example 'CN=foobar.com,O=Foo Corp,C=US'
+
+        An X.509 name is a two-level structure: a list of sets of attributes.
+        Each list element is separated by ',' and within each list element, set
+        elements are separated by '+'. The latter is almost never used in
+        real world certificates. According to RFC4514 section 2.1 the
+        RDNSequence must be reversed when converting to string representation.
+        """
+        return ",".join(
+            attr.rfc4514_string(attr_name_overrides)
+            for attr in reversed(self._attributes)
+        )
+
+    def get_attributes_for_oid(
+        self,
+        oid: ObjectIdentifier,
+    ) -> list[NameAttribute[str | bytes]]:
+        return [i for i in self if i.oid == oid]
+
+    @property
+    def rdns(self) -> list[RelativeDistinguishedName]:
+        return self._attributes
+
+    def public_bytes(self, backend: typing.Any = None) -> bytes:
+        return rust_x509.encode_name_bytes(self)
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Name):
+            return NotImplemented
+
+        return self._attributes == other._attributes
+
+    def __hash__(self) -> int:
+        # TODO: this is relatively expensive, if this looks like a bottleneck
+        # for you, consider optimizing!
+        return hash(tuple(self._attributes))
+
+    def __iter__(self) -> Iterator[NameAttribute[str | bytes]]:
+        for rdn in self._attributes:
+            yield from rdn
+
+    def __len__(self) -> int:
+        return sum(len(rdn) for rdn in self._attributes)
+
+    def __repr__(self) -> str:
+        return f"<Name({self.rfc4514_string()})>"
+
+
+class _RFC4514NameParser:
+    _OID_RE = re.compile(r"(0|([1-9]\d*))(\.(0|([1-9]\d*)))+")
+    _DESCR_RE = re.compile(r"[a-zA-Z][a-zA-Z\d-]*")
+
+    _ESCAPE_SPECIAL = r"[\\ #=\"\+,;<>]"
+    _ESCAPE_HEX = r"[\da-zA-Z]{2}"
+    _PAIR = rf"\\({_ESCAPE_SPECIAL}|{_ESCAPE_HEX})"
+    _PAIR_MULTI_RE = re.compile(rf"(\\{_ESCAPE_SPECIAL})|((\\{_ESCAPE_HEX})+)")
+    _LUTF1 = r"[\x01-\x1f\x21\x24-\x2A\x2D-\x3A\x3D\x3F-\x5B\x5D-\x7F]"
+    _SUTF1 = r"[\x01-\x21\x23-\x2A\x2D-\x3A\x3D\x3F-\x5B\x5D-\x7F]"
+    _TUTF1 = r"[\x01-\x1F\x21\x23-\x2A\x2D-\x3A\x3D\x3F-\x5B\x5D-\x7F]"
+    _UTFMB = rf"[\x80-{chr(sys.maxunicode)}]"
+    _LEADCHAR = rf"{_LUTF1}|{_UTFMB}"
+    _STRINGCHAR = rf"{_SUTF1}|{_UTFMB}"
+    _TRAILCHAR = rf"{_TUTF1}|{_UTFMB}"
+    _STRING_RE = re.compile(
+        rf"""
+        (
+            ({_LEADCHAR}|{_PAIR})
+            (
+                ({_STRINGCHAR}|{_PAIR})*
+                ({_TRAILCHAR}|{_PAIR})
+            )?
+        )?
+        """,
+        re.VERBOSE,
+    )
+    _HEXSTRING_RE = re.compile(r"#([\da-zA-Z]{2})+")
+
+    def __init__(self, data: str, attr_name_overrides: _NameOidMap) -> None:
+        self._data = data
+        self._idx = 0
+
+        self._attr_name_overrides = attr_name_overrides
+
+    def _has_data(self) -> bool:
+        return self._idx < len(self._data)
+
+    def _peek(self) -> str | None:
+        if self._has_data():
+            return self._data[self._idx]
+        return None
+
+    def _read_char(self, ch: str) -> None:
+        if self._peek() != ch:
+            raise ValueError
+        self._idx += 1
+
+    def _read_re(self, pat) -> str:
+        match = pat.match(self._data, pos=self._idx)
+        if match is None:
+            raise ValueError
+        val = match.group()
+        self._idx += len(val)
+        return val
+
+    def parse(self) -> Name:
+        """
+        Parses the `data` string and converts it to a Name.
+
+        According to RFC4514 section 2.1 the RDNSequence must be
+        reversed when converting to string representation. So, when
+        we parse it, we need to reverse again to get the RDNs on the
+        correct order.
+        """
+
+        if not self._has_data():
+            return Name([])
+
+        rdns = [self._parse_rdn()]
+
+        while self._has_data():
+            self._read_char(",")
+            rdns.append(self._parse_rdn())
+
+        return Name(reversed(rdns))
+
+    def _parse_rdn(self) -> RelativeDistinguishedName:
+        nas = [self._parse_na()]
+        while self._peek() == "+":
+            self._read_char("+")
+            nas.append(self._parse_na())
+
+        return RelativeDistinguishedName(nas)
+
+    def _parse_na(self) -> NameAttribute[str]:
+        try:
+            oid_value = self._read_re(self._OID_RE)
+        except ValueError:
+            name = self._read_re(self._DESCR_RE)
+            oid = self._attr_name_overrides.get(
+                name, _NAME_TO_NAMEOID.get(name)
+            )
+            if oid is None:
+                raise ValueError
+        else:
+            oid = ObjectIdentifier(oid_value)
+
+        self._read_char("=")
+        if self._peek() == "#":
+            value = self._read_re(self._HEXSTRING_RE)
+            value = binascii.unhexlify(value[1:]).decode()
+        else:
+            raw_value = self._read_re(self._STRING_RE)
+            value = _unescape_dn_value(raw_value)
+
+        return NameAttribute(oid, value)

.mcp-venv/lib/python3.13/site-packages/cryptography/x509/ocsp.py

@@ -0,0 +1,379 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import datetime
+from collections.abc import Iterable
+
+from cryptography import utils, x509
+from cryptography.hazmat.bindings._rust import ocsp
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.asymmetric.types import (
+    CertificateIssuerPrivateKeyTypes,
+)
+from cryptography.x509.base import _reject_duplicate_extension
+
+
+class OCSPResponderEncoding(utils.Enum):
+    HASH = "By Hash"
+    NAME = "By Name"
+
+
+class OCSPResponseStatus(utils.Enum):
+    SUCCESSFUL = 0
+    MALFORMED_REQUEST = 1
+    INTERNAL_ERROR = 2
+    TRY_LATER = 3
+    SIG_REQUIRED = 5
+    UNAUTHORIZED = 6
+
+
+_ALLOWED_HASHES = (
+    hashes.SHA1,
+    hashes.SHA224,
+    hashes.SHA256,
+    hashes.SHA384,
+    hashes.SHA512,
+)
+
+
+def _verify_algorithm(algorithm: hashes.HashAlgorithm) -> None:
+    if not isinstance(algorithm, _ALLOWED_HASHES):
+        raise ValueError(
+            "Algorithm must be SHA1, SHA224, SHA256, SHA384, or SHA512"
+        )
+
+
+class OCSPCertStatus(utils.Enum):
+    GOOD = 0
+    REVOKED = 1
+    UNKNOWN = 2
+
+
+class _SingleResponse:
+    def __init__(
+        self,
+        resp: tuple[x509.Certificate, x509.Certificate] | None,
+        resp_hash: tuple[bytes, bytes, int] | None,
+        algorithm: hashes.HashAlgorithm,
+        cert_status: OCSPCertStatus,
+        this_update: datetime.datetime,
+        next_update: datetime.datetime | None,
+        revocation_time: datetime.datetime | None,
+        revocation_reason: x509.ReasonFlags | None,
+    ):
+        _verify_algorithm(algorithm)
+        if not isinstance(this_update, datetime.datetime):
+            raise TypeError("this_update must be a datetime object")
+        if next_update is not None and not isinstance(
+            next_update, datetime.datetime
+        ):
+            raise TypeError("next_update must be a datetime object or None")
+
+        self._resp = resp
+        self._resp_hash = resp_hash
+        self._algorithm = algorithm
+        self._this_update = this_update
+        self._next_update = next_update
+
+        if not isinstance(cert_status, OCSPCertStatus):
+            raise TypeError(
+                "cert_status must be an item from the OCSPCertStatus enum"
+            )
+        if cert_status is not OCSPCertStatus.REVOKED:
+            if revocation_time is not None:
+                raise ValueError(
+                    "revocation_time can only be provided if the certificate "
+                    "is revoked"
+                )
+            if revocation_reason is not None:
+                raise ValueError(
+                    "revocation_reason can only be provided if the certificate"
+                    " is revoked"
+                )
+        else:
+            if not isinstance(revocation_time, datetime.datetime):
+                raise TypeError("revocation_time must be a datetime object")
+
+            if revocation_reason is not None and not isinstance(
+                revocation_reason, x509.ReasonFlags
+            ):
+                raise TypeError(
+                    "revocation_reason must be an item from the ReasonFlags "
+                    "enum or None"
+                )
+
+        self._cert_status = cert_status
+        self._revocation_time = revocation_time
+        self._revocation_reason = revocation_reason
+
+
+OCSPRequest = ocsp.OCSPRequest
+OCSPResponse = ocsp.OCSPResponse
+OCSPSingleResponse = ocsp.OCSPSingleResponse
+
+
+class OCSPRequestBuilder:
+    def __init__(
+        self,
+        request: tuple[
+            x509.Certificate, x509.Certificate, hashes.HashAlgorithm
+        ]
+        | None = None,
+        request_hash: tuple[bytes, bytes, int, hashes.HashAlgorithm]
+        | None = None,
+        extensions: list[x509.Extension[x509.ExtensionType]] = [],
+    ) -> None:
+        self._request = request
+        self._request_hash = request_hash
+        self._extensions = extensions
+
+    def add_certificate(
+        self,
+        cert: x509.Certificate,
+        issuer: x509.Certificate,
+        algorithm: hashes.HashAlgorithm,
+    ) -> OCSPRequestBuilder:
+        if self._request is not None or self._request_hash is not None:
+            raise ValueError("Only one certificate can be added to a request")
+
+        _verify_algorithm(algorithm)
+        if not isinstance(cert, x509.Certificate) or not isinstance(
+            issuer, x509.Certificate
+        ):
+            raise TypeError("cert and issuer must be a Certificate")
+
+        return OCSPRequestBuilder(
+            (cert, issuer, algorithm), self._request_hash, self._extensions
+        )
+
+    def add_certificate_by_hash(
+        self,
+        issuer_name_hash: bytes,
+        issuer_key_hash: bytes,
+        serial_number: int,
+        algorithm: hashes.HashAlgorithm,
+    ) -> OCSPRequestBuilder:
+        if self._request is not None or self._request_hash is not None:
+            raise ValueError("Only one certificate can be added to a request")
+
+        if not isinstance(serial_number, int):
+            raise TypeError("serial_number must be an integer")
+
+        _verify_algorithm(algorithm)
+        utils._check_bytes("issuer_name_hash", issuer_name_hash)
+        utils._check_bytes("issuer_key_hash", issuer_key_hash)
+        if algorithm.digest_size != len(
+            issuer_name_hash
+        ) or algorithm.digest_size != len(issuer_key_hash):
+            raise ValueError(
+                "issuer_name_hash and issuer_key_hash must be the same length "
+                "as the digest size of the algorithm"
+            )
+
+        return OCSPRequestBuilder(
+            self._request,
+            (issuer_name_hash, issuer_key_hash, serial_number, algorithm),
+            self._extensions,
+        )
+
+    def add_extension(
+        self, extval: x509.ExtensionType, critical: bool
+    ) -> OCSPRequestBuilder:
+        if not isinstance(extval, x509.ExtensionType):
+            raise TypeError("extension must be an ExtensionType")
+
+        extension = x509.Extension(extval.oid, critical, extval)
+        _reject_duplicate_extension(extension, self._extensions)
+
+        return OCSPRequestBuilder(
+            self._request, self._request_hash, [*self._extensions, extension]
+        )
+
+    def build(self) -> OCSPRequest:
+        if self._request is None and self._request_hash is None:
+            raise ValueError("You must add a certificate before building")
+
+        return ocsp.create_ocsp_request(self)
+
+
+class OCSPResponseBuilder:
+    def __init__(
+        self,
+        response: _SingleResponse | None = None,
+        responder_id: tuple[x509.Certificate, OCSPResponderEncoding]
+        | None = None,
+        certs: list[x509.Certificate] | None = None,
+        extensions: list[x509.Extension[x509.ExtensionType]] = [],
+    ):
+        self._response = response
+        self._responder_id = responder_id
+        self._certs = certs
+        self._extensions = extensions
+
+    def add_response(
+        self,
+        cert: x509.Certificate,
+        issuer: x509.Certificate,
+        algorithm: hashes.HashAlgorithm,
+        cert_status: OCSPCertStatus,
+        this_update: datetime.datetime,
+        next_update: datetime.datetime | None,
+        revocation_time: datetime.datetime | None,
+        revocation_reason: x509.ReasonFlags | None,
+    ) -> OCSPResponseBuilder:
+        if self._response is not None:
+            raise ValueError("Only one response per OCSPResponse.")
+
+        if not isinstance(cert, x509.Certificate) or not isinstance(
+            issuer, x509.Certificate
+        ):
+            raise TypeError("cert and issuer must be a Certificate")
+
+        singleresp = _SingleResponse(
+            (cert, issuer),
+            None,
+            algorithm,
+            cert_status,
+            this_update,
+            next_update,
+            revocation_time,
+            revocation_reason,
+        )
+        return OCSPResponseBuilder(
+            singleresp,
+            self._responder_id,
+            self._certs,
+            self._extensions,
+        )
+
+    def add_response_by_hash(
+        self,
+        issuer_name_hash: bytes,
+        issuer_key_hash: bytes,
+        serial_number: int,
+        algorithm: hashes.HashAlgorithm,
+        cert_status: OCSPCertStatus,
+        this_update: datetime.datetime,
+        next_update: datetime.datetime | None,
+        revocation_time: datetime.datetime | None,
+        revocation_reason: x509.ReasonFlags | None,
+    ) -> OCSPResponseBuilder:
+        if self._response is not None:
+            raise ValueError("Only one response per OCSPResponse.")
+
+        if not isinstance(serial_number, int):
+            raise TypeError("serial_number must be an integer")
+
+        utils._check_bytes("issuer_name_hash", issuer_name_hash)
+        utils._check_bytes("issuer_key_hash", issuer_key_hash)
+        _verify_algorithm(algorithm)
+        if algorithm.digest_size != len(
+            issuer_name_hash
+        ) or algorithm.digest_size != len(issuer_key_hash):
+            raise ValueError(
+                "issuer_name_hash and issuer_key_hash must be the same length "
+                "as the digest size of the algorithm"
+            )
+
+        singleresp = _SingleResponse(
+            None,
+            (issuer_name_hash, issuer_key_hash, serial_number),
+            algorithm,
+            cert_status,
+            this_update,
+            next_update,
+            revocation_time,
+            revocation_reason,
+        )
+        return OCSPResponseBuilder(
+            singleresp,
+            self._responder_id,
+            self._certs,
+            self._extensions,
+        )
+
+    def responder_id(
+        self, encoding: OCSPResponderEncoding, responder_cert: x509.Certificate
+    ) -> OCSPResponseBuilder:
+        if self._responder_id is not None:
+            raise ValueError("responder_id can only be set once")
+        if not isinstance(responder_cert, x509.Certificate):
+            raise TypeError("responder_cert must be a Certificate")
+        if not isinstance(encoding, OCSPResponderEncoding):
+            raise TypeError(
+                "encoding must be an element from OCSPResponderEncoding"
+            )
+
+        return OCSPResponseBuilder(
+            self._response,
+            (responder_cert, encoding),
+            self._certs,
+            self._extensions,
+        )
+
+    def certificates(
+        self, certs: Iterable[x509.Certificate]
+    ) -> OCSPResponseBuilder:
+        if self._certs is not None:
+            raise ValueError("certificates may only be set once")
+        certs = list(certs)
+        if len(certs) == 0:
+            raise ValueError("certs must not be an empty list")
+        if not all(isinstance(x, x509.Certificate) for x in certs):
+            raise TypeError("certs must be a list of Certificates")
+        return OCSPResponseBuilder(
+            self._response,
+            self._responder_id,
+            certs,
+            self._extensions,
+        )
+
+    def add_extension(
+        self, extval: x509.ExtensionType, critical: bool
+    ) -> OCSPResponseBuilder:
+        if not isinstance(extval, x509.ExtensionType):
+            raise TypeError("extension must be an ExtensionType")
+
+        extension = x509.Extension(extval.oid, critical, extval)
+        _reject_duplicate_extension(extension, self._extensions)
+
+        return OCSPResponseBuilder(
+            self._response,
+            self._responder_id,
+            self._certs,
+            [*self._extensions, extension],
+        )
+
+    def sign(
+        self,
+        private_key: CertificateIssuerPrivateKeyTypes,
+        algorithm: hashes.HashAlgorithm | None,
+    ) -> OCSPResponse:
+        if self._response is None:
+            raise ValueError("You must add a response before signing")
+        if self._responder_id is None:
+            raise ValueError("You must add a responder_id before signing")
+
+        return ocsp.create_ocsp_response(
+            OCSPResponseStatus.SUCCESSFUL, self, private_key, algorithm
+        )
+
+    @classmethod
+    def build_unsuccessful(
+        cls, response_status: OCSPResponseStatus
+    ) -> OCSPResponse:
+        if not isinstance(response_status, OCSPResponseStatus):
+            raise TypeError(
+                "response_status must be an item from OCSPResponseStatus"
+            )
+        if response_status is OCSPResponseStatus.SUCCESSFUL:
+            raise ValueError("response_status cannot be SUCCESSFUL")
+
+        return ocsp.create_ocsp_response(response_status, None, None, None)
+
+
+load_der_ocsp_request = ocsp.load_der_ocsp_request
+load_der_ocsp_response = ocsp.load_der_ocsp_response

.mcp-venv/lib/python3.13/site-packages/cryptography/x509/oid.py

@@ -0,0 +1,37 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+from cryptography.hazmat._oid import (
+    AttributeOID,
+    AuthorityInformationAccessOID,
+    CertificatePoliciesOID,
+    CRLEntryExtensionOID,
+    ExtendedKeyUsageOID,
+    ExtensionOID,
+    NameOID,
+    ObjectIdentifier,
+    OCSPExtensionOID,
+    OtherNameFormOID,
+    PublicKeyAlgorithmOID,
+    SignatureAlgorithmOID,
+    SubjectInformationAccessOID,
+)
+
+__all__ = [
+    "AttributeOID",
+    "AuthorityInformationAccessOID",
+    "CRLEntryExtensionOID",
+    "CertificatePoliciesOID",
+    "ExtendedKeyUsageOID",
+    "ExtensionOID",
+    "NameOID",
+    "OCSPExtensionOID",
+    "ObjectIdentifier",
+    "OtherNameFormOID",
+    "PublicKeyAlgorithmOID",
+    "SignatureAlgorithmOID",
+    "SubjectInformationAccessOID",
+]

.mcp-venv/lib/python3.13/site-packages/cryptography/x509/verification.py

@@ -0,0 +1,34 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import typing
+
+from cryptography.hazmat.bindings._rust import x509 as rust_x509
+from cryptography.x509.general_name import DNSName, IPAddress
+
+__all__ = [
+    "ClientVerifier",
+    "Criticality",
+    "ExtensionPolicy",
+    "Policy",
+    "PolicyBuilder",
+    "ServerVerifier",
+    "Store",
+    "Subject",
+    "VerificationError",
+    "VerifiedClient",
+]
+
+Store = rust_x509.Store
+Subject = typing.Union[DNSName, IPAddress]
+VerifiedClient = rust_x509.VerifiedClient
+ClientVerifier = rust_x509.ClientVerifier
+ServerVerifier = rust_x509.ServerVerifier
+PolicyBuilder = rust_x509.PolicyBuilder
+Policy = rust_x509.Policy
+ExtensionPolicy = rust_x509.ExtensionPolicy
+Criticality = rust_x509.Criticality
+VerificationError = rust_x509.VerificationError

.mcp-venv/lib/python3.13/site-packages/h11-0.16.0.dist-info/INSTALLER

@@ -0,0 +1 @@
+pip

.mcp-venv/lib/python3.13/site-packages/h11-0.16.0.dist-info/METADATA

@@ -0,0 +1,202 @@
+Metadata-Version: 2.4
+Name: h11
+Version: 0.16.0
+Summary: A pure-Python, bring-your-own-I/O implementation of HTTP/1.1
+Home-page: https://github.com/python-hyper/h11
+Author: Nathaniel J. Smith
+Author-email: njs@pobox.com
+License: MIT
+Classifier: Development Status :: 3 - Alpha
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3 :: Only
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: 3.9
+Classifier: Programming Language :: Python :: 3.10
+Classifier: Programming Language :: Python :: 3.11
+Classifier: Programming Language :: Python :: 3.12
+Classifier: Topic :: Internet :: WWW/HTTP
+Classifier: Topic :: System :: Networking
+Requires-Python: >=3.8
+License-File: LICENSE.txt
+Dynamic: author
+Dynamic: author-email
+Dynamic: classifier
+Dynamic: description
+Dynamic: home-page
+Dynamic: license
+Dynamic: license-file
+Dynamic: requires-python
+Dynamic: summary
+
+h11
+===
+
+.. image:: https://travis-ci.org/python-hyper/h11.svg?branch=master
+   :target: https://travis-ci.org/python-hyper/h11
+   :alt: Automated test status
+
+.. image:: https://codecov.io/gh/python-hyper/h11/branch/master/graph/badge.svg
+   :target: https://codecov.io/gh/python-hyper/h11
+   :alt: Test coverage
+
+.. image:: https://readthedocs.org/projects/h11/badge/?version=latest
+   :target: http://h11.readthedocs.io/en/latest/?badge=latest
+   :alt: Documentation Status
+
+This is a little HTTP/1.1 library written from scratch in Python,
+heavily inspired by `hyper-h2 <https://hyper-h2.readthedocs.io/>`_.
+
+It's a "bring-your-own-I/O" library; h11 contains no IO code
+whatsoever. This means you can hook h11 up to your favorite network
+API, and that could be anything you want: synchronous, threaded,
+asynchronous, or your own implementation of `RFC 6214
+<https://tools.ietf.org/html/rfc6214>`_ -- h11 won't judge you.
+(Compare this to the current state of the art, where every time a `new
+network API <https://trio.readthedocs.io/>`_ comes along then someone
+gets to start over reimplementing the entire HTTP protocol from
+scratch.) Cory Benfield made an `excellent blog post describing the
+benefits of this approach
+<https://lukasa.co.uk/2015/10/The_New_Hyper/>`_, or if you like video
+then here's his `PyCon 2016 talk on the same theme
+<https://www.youtube.com/watch?v=7cC3_jGwl_U>`_.
+
+This also means that h11 is not immediately useful out of the box:
+it's a toolkit for building programs that speak HTTP, not something
+that could directly replace ``requests`` or ``twisted.web`` or
+whatever. But h11 makes it much easier to implement something like
+``requests`` or ``twisted.web``.
+
+At a high level, working with h11 goes like this:
+
+1) First, create an ``h11.Connection`` object to track the state of a
+   single HTTP/1.1 connection.
+
+2) When you read data off the network, pass it to
+   ``conn.receive_data(...)``; you'll get back a list of objects
+   representing high-level HTTP "events".
+
+3) When you want to send a high-level HTTP event, create the
+   corresponding "event" object and pass it to ``conn.send(...)``;
+   this will give you back some bytes that you can then push out
+   through the network.
+
+For example, a client might instantiate and then send a
+``h11.Request`` object, then zero or more ``h11.Data`` objects for the
+request body (e.g., if this is a POST), and then a
+``h11.EndOfMessage`` to indicate the end of the message. Then the
+server would then send back a ``h11.Response``, some ``h11.Data``, and
+its own ``h11.EndOfMessage``. If either side violates the protocol,
+you'll get a ``h11.ProtocolError`` exception.
+
+h11 is suitable for implementing both servers and clients, and has a
+pleasantly symmetric API: the events you send as a client are exactly
+the ones that you receive as a server and vice-versa.
+
+`Here's an example of a tiny HTTP client
+<https://github.com/python-hyper/h11/blob/master/examples/basic-client.py>`_
+
+It also has `a fine manual <https://h11.readthedocs.io/>`_.
+
+FAQ
+---
+
+*Whyyyyy?*
+
+I wanted to play with HTTP in `Curio
+<https://curio.readthedocs.io/en/latest/tutorial.html>`__ and `Trio
+<https://trio.readthedocs.io>`__, which at the time didn't have any
+HTTP libraries. So I thought, no big deal, Python has, like, a dozen
+different implementations of HTTP, surely I can find one that's
+reusable. I didn't find one, but I did find Cory's call-to-arms
+blog-post. So I figured, well, fine, if I have to implement HTTP from
+scratch, at least I can make sure no-one *else* has to ever again.
+
+*Should I use it?*
+
+Maybe. You should be aware that it's a very young project. But, it's
+feature complete and has an exhaustive test-suite and complete docs,
+so the next step is for people to try using it and see how it goes
+:-). If you do then please let us know -- if nothing else we'll want
+to talk to you before making any incompatible changes!
+
+*What are the features/limitations?*
+
+Roughly speaking, it's trying to be a robust, complete, and non-hacky
+implementation of the first "chapter" of the HTTP/1.1 spec: `RFC 7230:
+HTTP/1.1 Message Syntax and Routing
+<https://tools.ietf.org/html/rfc7230>`_. That is, it mostly focuses on
+implementing HTTP at the level of taking bytes on and off the wire,
+and the headers related to that, and tries to be anal about spec
+conformance. It doesn't know about higher-level concerns like URL
+routing, conditional GETs, cross-origin cookie policies, or content
+negotiation. But it does know how to take care of framing,
+cross-version differences in keep-alive handling, and the "obsolete
+line folding" rule, so you can focus your energies on the hard /
+interesting parts for your application, and it tries to support the
+full specification in the sense that any useful HTTP/1.1 conformant
+application should be able to use h11.
+
+It's pure Python, and has no dependencies outside of the standard
+library.
+
+It has a test suite with 100.0% coverage for both statements and
+branches.
+
+Currently it supports Python 3 (testing on 3.8-3.12) and PyPy 3.
+The last Python 2-compatible version was h11 0.11.x.
+(Originally it had a Cython wrapper for `http-parser
+<https://github.com/nodejs/http-parser>`_ and a beautiful nested state
+machine implemented with ``yield from`` to postprocess the output. But
+I had to take these out -- the new *parser* needs fewer lines-of-code
+than the old *parser wrapper*, is written in pure Python, uses no
+exotic language syntax, and has more features. It's sad, really; that
+old state machine was really slick. I just need a few sentences here
+to mourn that.)
+
+I don't know how fast it is. I haven't benchmarked or profiled it yet,
+so it's probably got a few pointless hot spots, and I've been trying
+to err on the side of simplicity and robustness instead of
+micro-optimization. But at the architectural level I tried hard to
+avoid fundamentally bad decisions, e.g., I believe that all the
+parsing algorithms remain linear-time even in the face of pathological
+input like slowloris, and there are no byte-by-byte loops. (I also
+believe that it maintains bounded memory usage in the face of
+arbitrary/pathological input.)
+
+The whole library is ~800 lines-of-code. You can read and understand
+the whole thing in less than an hour. Most of the energy invested in
+this so far has been spent on trying to keep things simple by
+minimizing special-cases and ad hoc state manipulation; even though it
+is now quite small and simple, I'm still annoyed that I haven't
+figured out how to make it even smaller and simpler. (Unfortunately,
+HTTP does not lend itself to simplicity.)
+
+The API is ~feature complete and I don't expect the general outlines
+to change much, but you can't judge an API's ergonomics until you
+actually document and use it, so I'd expect some changes in the
+details.
+
+*How do I try it?*
+
+.. code-block:: sh
+
+  $ pip install h11
+  $ git clone git@github.com:python-hyper/h11
+  $ cd h11/examples
+  $ python basic-client.py
+
+and go from there.
+
+*License?*
+
+MIT
+
+*Code of conduct?*
+
+Contributors are requested to follow our `code of conduct
+<https://github.com/python-hyper/h11/blob/master/CODE_OF_CONDUCT.md>`_ in
+all project spaces.

.mcp-venv/lib/python3.13/site-packages/h11-0.16.0.dist-info/RECORD

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+h11-0.16.0.dist-info/METADATA,sha256=KPMmCYrAn8unm48YD5YIfIQf4kViFct7hyqcfVzRnWQ,8348
+h11-0.16.0.dist-info/RECORD,,
+h11-0.16.0.dist-info/WHEEL,sha256=CmyFI0kx5cdEMTLiONQRbGQwjIoR1aIYB7eCAQ4KPJ0,91
+h11-0.16.0.dist-info/licenses/LICENSE.txt,sha256=N9tbuFkm2yikJ6JYZ_ELEjIAOuob5pzLhRE4rbjm82E,1124
+h11-0.16.0.dist-info/top_level.txt,sha256=F7dC4jl3zeh8TGHEPaWJrMbeuoWbS379Gwdi-Yvdcis,4
+h11/__init__.py,sha256=iO1KzkSO42yZ6ffg-VMgbx_ZVTWGUY00nRYEWn-s3kY,1507
+h11/__pycache__/__init__.cpython-313.pyc,,
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+h11/__pycache__/_connection.cpython-313.pyc,,
+h11/__pycache__/_events.cpython-313.pyc,,
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+h11/__pycache__/_util.cpython-313.pyc,,
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+h11/_state.py,sha256=_5LG_BGR8FCcFQeBPH-TMHgm_-B-EUcWCnQof_9XjFE,13231
+h11/_util.py,sha256=LWkkjXyJaFlAy6Lt39w73UStklFT5ovcvo0TkY7RYuk,4888
+h11/_version.py,sha256=GVSsbPSPDcOuF6ptfIiXnVJoaEm3ygXbMnqlr_Giahw,686
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.mcp-venv/lib/python3.13/site-packages/h11-0.16.0.dist-info/WHEEL

@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: setuptools (78.1.0)
+Root-Is-Purelib: true
+Tag: py3-none-any
+

.mcp-venv/lib/python3.13/site-packages/h11-0.16.0.dist-info/licenses/LICENSE.txt

@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Nathaniel J. Smith <njs@pobox.com> and other contributors
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

.mcp-venv/lib/python3.13/site-packages/h11-0.16.0.dist-info/top_level.txt

@@ -0,0 +1 @@
+h11

.mcp-venv/lib/python3.13/site-packages/h11/__init__.py

@@ -0,0 +1,62 @@
+# A highish-level implementation of the HTTP/1.1 wire protocol (RFC 7230),
+# containing no networking code at all, loosely modelled on hyper-h2's generic
+# implementation of HTTP/2 (and in particular the h2.connection.H2Connection
+# class). There's still a bunch of subtle details you need to get right if you
+# want to make this actually useful, because it doesn't implement all the
+# semantics to check that what you're asking to write to the wire is sensible,
+# but at least it gets you out of dealing with the wire itself.
+
+from h11._connection import Connection, NEED_DATA, PAUSED
+from h11._events import (
+    ConnectionClosed,
+    Data,
+    EndOfMessage,
+    Event,
+    InformationalResponse,
+    Request,
+    Response,
+)
+from h11._state import (
+    CLIENT,
+    CLOSED,
+    DONE,
+    ERROR,
+    IDLE,
+    MIGHT_SWITCH_PROTOCOL,
+    MUST_CLOSE,
+    SEND_BODY,
+    SEND_RESPONSE,
+    SERVER,
+    SWITCHED_PROTOCOL,
+)
+from h11._util import LocalProtocolError, ProtocolError, RemoteProtocolError
+from h11._version import __version__
+
+PRODUCT_ID = "python-h11/" + __version__
+
+
+__all__ = (
+    "Connection",
+    "NEED_DATA",
+    "PAUSED",
+    "ConnectionClosed",
+    "Data",
+    "EndOfMessage",
+    "Event",
+    "InformationalResponse",
+    "Request",
+    "Response",
+    "CLIENT",
+    "CLOSED",
+    "DONE",
+    "ERROR",
+    "IDLE",
+    "MUST_CLOSE",
+    "SEND_BODY",
+    "SEND_RESPONSE",
+    "SERVER",
+    "SWITCHED_PROTOCOL",
+    "ProtocolError",
+    "LocalProtocolError",
+    "RemoteProtocolError",
+)

.mcp-venv/lib/python3.13/site-packages/h11/_abnf.py

@@ -0,0 +1,132 @@
+# We use native strings for all the re patterns, to take advantage of string
+# formatting, and then convert to bytestrings when compiling the final re
+# objects.
+
+# https://svn.tools.ietf.org/svn/wg/httpbis/specs/rfc7230.html#whitespace
+#  OWS            = *( SP / HTAB )
+#                 ; optional whitespace
+OWS = r"[ \t]*"
+
+# https://svn.tools.ietf.org/svn/wg/httpbis/specs/rfc7230.html#rule.token.separators
+#   token          = 1*tchar
+#
+#   tchar          = "!" / "#" / "$" / "%" / "&" / "'" / "*"
+#                  / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~"
+#                  / DIGIT / ALPHA
+#                  ; any VCHAR, except delimiters
+token = r"[-!#$%&'*+.^_`|~0-9a-zA-Z]+"
+
+# https://svn.tools.ietf.org/svn/wg/httpbis/specs/rfc7230.html#header.fields
+#  field-name     = token
+field_name = token
+
+# The standard says:
+#
+#  field-value    = *( field-content / obs-fold )
+#  field-content  = field-vchar [ 1*( SP / HTAB ) field-vchar ]
+#  field-vchar    = VCHAR / obs-text
+#  obs-fold       = CRLF 1*( SP / HTAB )
+#                 ; obsolete line folding
+#                 ; see Section 3.2.4
+#
+# https://tools.ietf.org/html/rfc5234#appendix-B.1
+#
+#   VCHAR          =  %x21-7E
+#                  ; visible (printing) characters
+#
+# https://svn.tools.ietf.org/svn/wg/httpbis/specs/rfc7230.html#rule.quoted-string
+#   obs-text       = %x80-FF
+#
+# However, the standard definition of field-content is WRONG! It disallows
+# fields containing a single visible character surrounded by whitespace,
+# e.g. "foo a bar".
+#
+# See: https://www.rfc-editor.org/errata_search.php?rfc=7230&eid=4189
+#
+# So our definition of field_content attempts to fix it up...
+#
+# Also, we allow lots of control characters, because apparently people assume
+# that they're legal in practice (e.g., google analytics makes cookies with
+# \x01 in them!):
+#   https://github.com/python-hyper/h11/issues/57
+# We still don't allow NUL or whitespace, because those are often treated as
+# meta-characters and letting them through can lead to nasty issues like SSRF.
+vchar = r"[\x21-\x7e]"
+vchar_or_obs_text = r"[^\x00\s]"
+field_vchar = vchar_or_obs_text
+field_content = r"{field_vchar}+(?:[ \t]+{field_vchar}+)*".format(**globals())
+
+# We handle obs-fold at a different level, and our fixed-up field_content
+# already grows to swallow the whole value, so ? instead of *
+field_value = r"({field_content})?".format(**globals())
+
+#  header-field   = field-name ":" OWS field-value OWS
+header_field = (
+    r"(?P<field_name>{field_name})"
+    r":"
+    r"{OWS}"
+    r"(?P<field_value>{field_value})"
+    r"{OWS}".format(**globals())
+)
+
+# https://svn.tools.ietf.org/svn/wg/httpbis/specs/rfc7230.html#request.line
+#
+#   request-line   = method SP request-target SP HTTP-version CRLF
+#   method         = token
+#   HTTP-version   = HTTP-name "/" DIGIT "." DIGIT
+#   HTTP-name      = %x48.54.54.50 ; "HTTP", case-sensitive
+#
+# request-target is complicated (see RFC 7230 sec 5.3) -- could be path, full
+# URL, host+port (for connect), or even "*", but in any case we are guaranteed
+# that it contists of the visible printing characters.
+method = token
+request_target = r"{vchar}+".format(**globals())
+http_version = r"HTTP/(?P<http_version>[0-9]\.[0-9])"
+request_line = (
+    r"(?P<method>{method})"
+    r" "
+    r"(?P<target>{request_target})"
+    r" "
+    r"{http_version}".format(**globals())
+)
+
+# https://svn.tools.ietf.org/svn/wg/httpbis/specs/rfc7230.html#status.line
+#
+#   status-line = HTTP-version SP status-code SP reason-phrase CRLF
+#   status-code    = 3DIGIT
+#   reason-phrase  = *( HTAB / SP / VCHAR / obs-text )
+status_code = r"[0-9]{3}"
+reason_phrase = r"([ \t]|{vchar_or_obs_text})*".format(**globals())
+status_line = (
+    r"{http_version}"
+    r" "
+    r"(?P<status_code>{status_code})"
+    # However, there are apparently a few too many servers out there that just
+    # leave out the reason phrase:
+    #   https://github.com/scrapy/scrapy/issues/345#issuecomment-281756036
+    #   https://github.com/seanmonstar/httparse/issues/29
+    # so make it optional. ?: is a non-capturing group.
+    r"(?: (?P<reason>{reason_phrase}))?".format(**globals())
+)
+
+HEXDIG = r"[0-9A-Fa-f]"
+# Actually
+#
+#      chunk-size     = 1*HEXDIG
+#
+# but we impose an upper-limit to avoid ridiculosity. len(str(2**64)) == 20
+chunk_size = r"({HEXDIG}){{1,20}}".format(**globals())
+# Actually
+#
+#     chunk-ext      = *( ";" chunk-ext-name [ "=" chunk-ext-val ] )
+#
+# but we aren't parsing the things so we don't really care.
+chunk_ext = r";.*"
+chunk_header = (
+    r"(?P<chunk_size>{chunk_size})"
+    r"(?P<chunk_ext>{chunk_ext})?"
+    r"{OWS}\r\n".format(
+        **globals()
+    )  # Even though the specification does not allow for extra whitespaces,
+    # we are lenient with trailing whitespaces because some servers on the wild use it.
+)