34 lines
1.1 KiB
Python
34 lines
1.1 KiB
Python
# Copyright (c) 2017-2021 by Ron Frederick <ronf@timeheart.net> and others.
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#
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# This program and the accompanying materials are made available under
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# the terms of the Eclipse Public License v2.0 which accompanies this
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# distribution and is available at:
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#
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# http://www.eclipse.org/legal/epl-2.0/
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#
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# This program may also be made available under the following secondary
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# licenses when the conditions for such availability set forth in the
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# Eclipse Public License v2.0 are satisfied:
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#
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# GNU General Public License, Version 2.0, or any later versions of
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# that license
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#
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# SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
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#
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# Contributors:
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# Ron Frederick - initial implementation, API, and documentation
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"""A shim around PyCA for key derivation functions"""
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from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
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from .misc import hashes
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def pbkdf2_hmac(hash_name: str, passphrase: bytes, salt: bytes,
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count: int, key_size: int) -> bytes:
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"""A shim around PyCA for PBKDF2 HMAC key derivation"""
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return PBKDF2HMAC(hashes[hash_name](), key_size, salt,
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count).derive(passphrase)
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