File size: 5,155 Bytes
eca5751 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 | """Crypto Tools - hashing, encryption."""
from __future__ import annotations
import hashlib
import hmac
import base64
from typing import Dict, Any
from .base import Tool, ToolResult, ToolContext, ToolCategory, ToolSafety
class HashTool(Tool):
"""Compute hash của data/file."""
category = ToolCategory.CRYPTO
safety = ToolSafety.SAFE
@property
def name(self) -> str:
return "hash"
@property
def description(self) -> str:
return "Compute hash (md5, sha1, sha256, sha512, blake2) của string hoặc file."
@property
def parameters(self) -> Dict[str, Any]:
return {
"type": "object",
"properties": {
"input": {"type": "string", "description": "String or file path"},
"algorithm": {"type": "string", "enum": ["md5", "sha1", "sha256", "sha512", "blake2b", "blake2s"], "default": "sha256"},
"is_file": {"type": "boolean", "default": False},
},
"required": ["input"],
}
def execute(self, args: Dict[str, Any], context: ToolContext) -> ToolResult:
import os
inp = args["input"]
algorithm = args.get("algorithm", "sha256")
is_file = args.get("is_file", False)
try:
h = hashlib.new(algorithm)
if is_file or (os.path.exists(inp) and len(inp) < 1024):
with open(inp, "rb") as f:
for chunk in iter(lambda: f.read(8192), b""):
h.update(chunk)
source = f"file:{inp}"
else:
h.update(inp.encode("utf-8"))
source = "string"
return ToolResult(
success=True,
output=f"{algorithm}({source}) = {h.hexdigest()}",
metadata={
"algorithm": algorithm,
"hash": h.hexdigest(),
"source": source,
},
)
except Exception as e:
return ToolResult(success=False, error=str(e), return_code=1)
class EncryptTool(Tool):
"""Encrypt/decrypt data với AES (requires cryptography lib)."""
category = ToolCategory.CRYPTO
safety = ToolSafety.DANGEROUS
@property
def name(self) -> str:
return "encrypt"
@property
def description(self) -> str:
return "Encrypt/decrypt data với AES-256-GCM. Requires 'cryptography' lib."
@property
def parameters(self) -> Dict[str, Any]:
return {
"type": "object",
"properties": {
"action": {"type": "string", "enum": ["encrypt", "decrypt"]},
"data": {"type": "string"},
"password": {"type": "string"},
},
"required": ["action", "data", "password"],
}
def execute(self, args: Dict[str, Any], context: ToolContext) -> ToolResult:
try:
from cryptography.hazmat.primitives.ciphers.aead import AESGCM
from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
from cryptography.hazmat.primitives import hashes
import os as _os
except ImportError:
return ToolResult(
success=False,
error="cryptography not installed. Run: pip install cryptography",
return_code=1,
)
action = args["action"]
data = args["data"]
password = args["password"]
try:
if action == "encrypt":
salt = _os.urandom(16)
kdf = PBKDF2HMAC(
algorithm=hashes.SHA256(),
length=32,
salt=salt,
iterations=100000,
)
key = kdf.derive(password.encode())
aesgcm = AESGCM(key)
nonce = _os.urandom(12)
ciphertext = aesgcm.encrypt(nonce, data.encode(), None)
encrypted = base64.b64encode(salt + nonce + ciphertext).decode()
return ToolResult(
success=True,
output=encrypted,
metadata={"action": "encrypt", "algorithm": "AES-256-GCM"},
)
else: # decrypt
raw = base64.b64decode(data)
salt, nonce, ciphertext = raw[:16], raw[16:28], raw[28:]
kdf = PBKDF2HMAC(
algorithm=hashes.SHA256(),
length=32,
salt=salt,
iterations=100000,
)
key = kdf.derive(password.encode())
aesgcm = AESGCM(key)
plaintext = aesgcm.decrypt(nonce, ciphertext, None).decode()
return ToolResult(
success=True,
output=plaintext,
metadata={"action": "decrypt"},
)
except Exception as e:
return ToolResult(success=False, error=str(e), return_code=1)
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