75 lines
2.6 KiB
Python
75 lines
2.6 KiB
Python
# Copyright 2017 Donald Stufft and individual contributors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import absolute_import
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from nacl.exceptions import InvalidkeyError
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from . import _argon2, argon2i, argon2id, scrypt
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STRPREFIX = argon2id.STRPREFIX
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PWHASH_SIZE = argon2id.PWHASH_SIZE
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assert _argon2.ALG_ARGON2_DEFAULT == _argon2.ALG_ARGON2ID13
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# since version 1.0.15 of libsodium
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PASSWD_MIN = argon2id.PASSWD_MIN
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PASSWD_MAX = argon2id.PASSWD_MAX
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MEMLIMIT_MAX = argon2id.MEMLIMIT_MAX
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MEMLIMIT_MIN = argon2id.MEMLIMIT_MIN
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OPSLIMIT_MAX = argon2id.OPSLIMIT_MAX
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OPSLIMIT_MIN = argon2id.OPSLIMIT_MIN
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OPSLIMIT_INTERACTIVE = argon2id.OPSLIMIT_INTERACTIVE
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MEMLIMIT_INTERACTIVE = argon2id.MEMLIMIT_INTERACTIVE
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OPSLIMIT_MODERATE = argon2id.OPSLIMIT_MODERATE
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MEMLIMIT_MODERATE = argon2id.MEMLIMIT_MODERATE
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OPSLIMIT_SENSITIVE = argon2id.OPSLIMIT_SENSITIVE
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MEMLIMIT_SENSITIVE = argon2id.MEMLIMIT_SENSITIVE
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str = argon2id.str
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assert argon2i.ALG != argon2id.ALG
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SCRYPT_SALTBYTES = scrypt.SALTBYTES
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SCRYPT_PWHASH_SIZE = scrypt.PWHASH_SIZE
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SCRYPT_OPSLIMIT_INTERACTIVE = scrypt.OPSLIMIT_INTERACTIVE
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SCRYPT_MEMLIMIT_INTERACTIVE = scrypt.MEMLIMIT_INTERACTIVE
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SCRYPT_OPSLIMIT_SENSITIVE = scrypt.OPSLIMIT_SENSITIVE
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SCRYPT_MEMLIMIT_SENSITIVE = scrypt.MEMLIMIT_SENSITIVE
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kdf_scryptsalsa208sha256 = scrypt.kdf
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scryptsalsa208sha256_str = scrypt.str
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verify_scryptsalsa208sha256 = scrypt.verify
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def verify(password_hash, password):
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"""
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Takes a modular crypt encoded stored password hash derived using one
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of the algorithms supported by `libsodium` and checks if the user provided
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password will hash to the same string when using the parameters saved
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in the stored hash
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"""
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if password_hash.startswith(argon2id.STRPREFIX):
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return argon2id.verify(password_hash, password)
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elif password_hash.startswith(argon2i.STRPREFIX):
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return argon2id.verify(password_hash, password)
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elif password_hash.startswith(scrypt.STRPREFIX):
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return scrypt.verify(password_hash, password)
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else:
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raise(InvalidkeyError("given password_hash is not "
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"in a supported format"
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)
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)
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