40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
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"""Password hashing for CTXD user accounts (stdlib only)."""
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from __future__ import annotations
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import hashlib
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import secrets
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PBKDF2_ITERATIONS = 600_000
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SCHEME = "pbkdf2_sha256"
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def hash_password(password: str) -> str:
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if not password:
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raise ValueError("password required")
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salt = secrets.token_hex(16)
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digest = hashlib.pbkdf2_hmac(
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"sha256",
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password.encode("utf-8"),
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salt.encode("utf-8"),
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PBKDF2_ITERATIONS,
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)
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return f"{SCHEME}${PBKDF2_ITERATIONS}${salt}${digest.hex()}"
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def verify_password(password: str, token_hash: str | None) -> bool:
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if not password or not token_hash:
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return False
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try:
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scheme, iters_s, salt, expected_hex = token_hash.split("$", 3)
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if scheme != SCHEME:
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return False
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digest = hashlib.pbkdf2_hmac(
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"sha256",
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password.encode("utf-8"),
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salt.encode("utf-8"),
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int(iters_s),
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)
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return secrets.compare_digest(digest.hex(), expected_hex)
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except (ValueError, TypeError):
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return False
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