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# Copyright 2013 Donald Stufft and individual contributors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import absolute_import
from __future__ import division
import nacl.bindings
_argon2_strbytes_plus_one = nacl.bindings.crypto_pwhash_STRBYTES
PWHASH_SIZE = _argon2_strbytes_plus_one - 1
SALTBYTES = nacl.bindings.crypto_pwhash_SALTBYTES
PASSWD_MIN = nacl.bindings.crypto_pwhash_PASSWD_MIN
PASSWD_MAX = nacl.bindings.crypto_pwhash_PASSWD_MAX
PWHASH_SIZE = _argon2_strbytes_plus_one - 1
BYTES_MAX = nacl.bindings.crypto_pwhash_BYTES_MAX
BYTES_MIN = nacl.bindings.crypto_pwhash_BYTES_MIN
ALG_ARGON2I13 = nacl.bindings.crypto_pwhash_ALG_ARGON2I13
ALG_ARGON2ID13 = nacl.bindings.crypto_pwhash_ALG_ARGON2ID13
ALG_ARGON2_DEFAULT = nacl.bindings.crypto_pwhash_ALG_DEFAULT
def verify(password_hash, password):
"""
Takes a modular crypt encoded argon2i or argon2id stored password hash
and checks if the user provided password will hash to the same string
when using the stored parameters
:param password_hash: password hash serialized in modular crypt() format
:type password_hash: bytes
:param password: user provided password
:type password: bytes
:rtype: boolean
.. versionadded:: 1.2
"""
return nacl.bindings.crypto_pwhash_str_verify(password_hash,
password)
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