50 lines
1.2 KiB
Python
50 lines
1.2 KiB
Python
"""Хеширование паролей (PBKDF2-SHA256, без внешних зависимостей)."""
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from __future__ import annotations
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import hashlib
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import hmac
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import secrets
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_ITERATIONS = 210_000
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_SALT_BYTES = 16
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_DKLEN = 32
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def hash_password(password: str) -> str:
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salt = secrets.token_bytes(_SALT_BYTES)
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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,
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_ITERATIONS,
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dklen=_DKLEN,
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)
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return f"pbkdf2_sha256${_ITERATIONS}${salt.hex()}${digest.hex()}"
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def verify_password(password: str, password_hash: str) -> bool:
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try:
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algo, iters_s, salt_hex, digest_hex = password_hash.split("$", 3)
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if algo != "pbkdf2_sha256":
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return False
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iterations = int(iters_s)
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salt = bytes.fromhex(salt_hex)
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expected = bytes.fromhex(digest_hex)
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except (ValueError, TypeError):
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return False
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got = hashlib.pbkdf2_hmac(
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"sha256",
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password.encode("utf-8"),
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salt,
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iterations,
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dklen=len(expected),
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)
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return hmac.compare_digest(got, expected)
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def new_session_token() -> str:
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return secrets.token_urlsafe(32)
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