| |
| """Verify SHA-256 hashes for the listed release files, without network access.""" |
| from __future__ import annotations |
|
|
| import hashlib |
| import re |
| from pathlib import Path |
|
|
| ROOT = Path(__file__).resolve().parent |
|
|
|
|
| def verify() -> int: |
| manifest = ROOT / "SHA256SUMS.txt" |
| if not manifest.is_file(): |
| raise ValueError("Missing release SHA256SUMS.txt") |
| entries = manifest.read_text(encoding="utf-8").splitlines() |
| if not entries: |
| raise ValueError("Empty checksum manifest") |
| seen = set() |
| for line in entries: |
| match = re.fullmatch(r"([0-9a-f]{64}) (.+)", line) |
| if match is None: |
| raise ValueError("Malformed checksum manifest line") |
| expected, relative = match.groups() |
| path = (ROOT / relative).resolve() |
| if not path.is_relative_to(ROOT) or relative in seen: |
| raise ValueError("Unsafe or duplicate checksum path") |
| seen.add(relative) |
| if not path.is_file(): |
| raise ValueError(f"Missing release file: {relative}") |
| if hashlib.sha256(path.read_bytes()).hexdigest() != expected: |
| raise ValueError(f"Checksum mismatch: {relative}") |
| return len(entries) |
|
|
|
|
| if __name__ == "__main__": |
| try: |
| print(f"PASS: {verify()} listed release files match SHA-256 hashes.") |
| except (OSError, ValueError) as error: |
| raise SystemExit(f"FAIL: {error}") |
|
|
