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187144d4e7
Trim and tighten code comments and docstrings across the repository. Comment-only: every changed file verified code-identical to main via AST/token comparison.
43 lines
1 KiB
Python
43 lines
1 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-only
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# Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
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"""
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Password hashing utilities using PBKDF2.
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"""
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import hashlib
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import hmac
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import secrets
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from typing import Tuple
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def hash_password(password: str, salt: str | None = None) -> Tuple[str, str]:
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"""
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Hash a password using PBKDF2-HMAC-SHA256.
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Returns (salt, hex_hash) tuple.
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"""
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if salt is None:
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salt = secrets.token_hex(16)
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dk = 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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100_000,
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)
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return salt, dk.hex()
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def verify_password(password: str, salt: str, hashed: str) -> bool:
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"""
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Verify a password against a stored salt and hash.
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Uses constant-time comparison to prevent timing attacks.
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"""
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dk = 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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100_000,
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)
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return hmac.compare_digest(dk.hex(), hashed)
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