/
lib
/
python3
/
dist-packages
/
cryptography
/
hazmat
/
primitives
/
kdf
/
__pycache__
/
Upload File
HOME
� p�g� � �j � d dl Z d dlmZ d dlmZmZmZmZ d dlm Z m Z d dl m Z G d� de � � Z dS )� N)�utils)�AlreadyFinalized� InvalidKey�UnsupportedAlgorithm�_Reasons)� constant_time�hashes)�KeyDerivationFunctionc �f � e Zd Z d dej dedededej f d�Z ded efd �Z ded ed dfd �Z dS )� PBKDF2HMACN� algorithm�length�salt� iterations�backendc � � ddl m} |� |� � s2t d� |j � � t j � � �d| _ || _ || _ t j d|� � || _ || _ d S )Nr �r z/{} is not supported for PBKDF2 by this backend.Fr )�,cryptography.hazmat.backends.openssl.backendr �pbkdf2_hmac_supportedr �format�namer �UNSUPPORTED_HASH�_used� _algorithm�_lengthr � _check_bytes�_salt� _iterations)�selfr r r r r �ossls �K/usr/lib/python3/dist-packages/cryptography/hazmat/primitives/kdf/pbkdf2.py�__init__zPBKDF2HMAC.__init__ s� � � � � � � � � �)�)�)�4�4� �&�A�H�H� �N�� � �)� � � � �� �#��� �� � ��6�4�(�(�(��� �%����� � key_material�returnc �� � | j rt d� � �d| _ t j d|� � ddlm} |� | j | j | j | j |� � S )Nz'PBKDF2 instances can only be used once.Tr$ r r ) r r r �_check_bytesliker r �derive_pbkdf2_hmacr r r r )r r$ r s r! �derivezPBKDF2HMAC.derive. sx � � �:� N�"�#L�M�M� M��� � � �~�|�<�<�<�H�H�H�H�H�H��)�)� �O� �L� �J� � � � � � r# � expected_keyc �x � | � |� � }t j ||� � st d� � �d S )NzKeys do not match.)r) r �bytes_eqr )r r$ r* � derived_keys r! �verifyzPBKDF2HMAC.verify> sA � ��k�k�,�/�/� � �%�k�<�@�@� 3� � 1�2�2� 2� 3� 3r# )N) �__name__� __module__� __qualname__r � HashAlgorithm�int�bytes�typing�Anyr" r) r. � r# r! r r s� � � � � � � #� &� &��'�&� �&� � &� � &� �� &� &� &� &�4 �5� �U� � � � � 3�5� 3�� 3�$� 3� 3� 3� 3� 3� 3r# r )r5 � cryptographyr �cryptography.exceptionsr r r r � cryptography.hazmat.primitivesr r �"cryptography.hazmat.primitives.kdfr r r7 r# r! �<module>r< s� �� � � � � � � � � � �� � � � � � � � � � � � A� @� @� @� @� @� @� @� D� D� D� D� D� D�.3� .3� .3� .3� .3�&� .3� .3� .3� .3� .3r#