Edit File: hkdf.cpython-311.pyc
� ��gh� � � � d dl mZ d dlZd dlmZ d dlmZmZ d dlm Z m Z m Z d dl m Z G d� de � � Z G d � d e � � ZdS ) � )� annotationsN)�utils)�AlreadyFinalized� InvalidKey)� constant_time�hashes�hmac)�KeyDerivationFunctionc �2 � e Zd Z ddd �Zdd�Zdd�Zdd�ZdS )�HKDFN� algorithm�hashes.HashAlgorithm�length�int�salt� bytes | None�info�backend� typing.Anyc � � || _ |�d| j j z }nt j d|� � || _ t | j ||� � | _ d S )N� r )� _algorithm� digest_sizer � _check_bytes�_salt� HKDFExpand� _hkdf_expand)�selfr r r r r s ��/builddir/build/BUILD/imunify360-venv-2.6.0/opt/imunify360/venv/lib64/python3.11/site-packages/cryptography/hazmat/primitives/kdf/hkdf.py�__init__z HKDF.__init__ sW � � $��� �<��T�_� 8�8�D�D� � �v�t� ,� ,� ,��� � &�t���� E� E����� � key_material�bytes�returnc � � t j | j | j � � }|� |� � |� � � S �N)r �HMACr r �update�finalize)r r" �hs r �_extractz HKDF._extract# s7 � � �I�d�j�$�/� 2� 2�� ��� � � � ��z�z�|�|�r! c � � t j d|� � | j � | � |� � � � S )Nr" )r �_check_bytesliker �deriver+ �r r" s r r. z HKDF.derive( s8 � � � �~�|�<�<�<�� �'�'�� � �l�(C�(C�D�D�Dr! � expected_key�Nonec �d � t j | � |� � |� � st �d S r& �r �bytes_eqr. r �r r" r0 s r �verifyz HKDF.verify, �3 � � �%�d�k�k�,�&?�&?� �N�N� � � � � r! r& ) r r r r r r r r r r �r" r# r$ r# �r" r# r0 r# r$ r1 )�__name__� __module__� __qualname__r r+ r. r6 � r! r r r sw � � � � � � #� F� F� F� F� F�& � � � � E� E� E� E� � � � � � r! r c �2 � e Zd Z ddd �Zdd�Zdd�Zdd�ZdS )r Nr r r r r r r r c � � || _ d|j z }||k rt d|� d�� � �|| _ |�d}nt j d|� � || _ d| _ d S )N� z Cannot derive keys larger than z octets.r! r F)r r � ValueError�_lengthr r �_info�_used)r r r r r � max_lengths r r zHKDFExpand.__init__2 s} � � $����9�0�0� � �J� � � �F�*�F�F�F�� � � �� � �<��D�D� � �v�t� ,� ,� ,��� ��� � � r! r" r# r$ c �, � dg}d}| j j t |� � dz z | j k r�t j || j � � }|� |d � � |� | j � � |� t |g� � � � |� |� � � � � |dz }| j j t |� � dz z | j k ��d� |� � d | j � S )Nr! � ���) r r �lenrB r r' r( rC r# �appendr) �join)r r" �output�counterr* s r �_expandzHKDFExpand._expandM s� � �������o�)�S��[�[�1�_�=�� �L�L�� �,���8�8�A� �H�H�V�B�Z� � � � �H�H�T�Z� � � � �H�H�U�G�9�%�%� &� &� &� �M�M�!�*�*�,�,� '� '� '� �q�L�G� �o�)�S��[�[�1�_�=�� �L�L� �x�x�� � ��$�,��/�/r! c � � t j d|� � | j rt �d| _ | � |� � S )Nr" T)r r- rD r rN r/ s r r. zHKDFExpand.derive[ s> � � � �~�|�<�<�<� �:� #�"� "��� ��|�|�L�)�)�)r! r0 r1 c �d � t j | � |� � |� � st �d S r& r3 r5 s r r6 zHKDFExpand.verifyc r7 r! r& )r r r r r r r r r8 r9 )r: r; r< r rN r. r6 r= r! r r r 1 sn � � � � � � #� � � � � �6 0� 0� 0� 0� *� *� *� *� � � � � � r! r )� __future__r �typing� cryptographyr �cryptography.exceptionsr r � cryptography.hazmat.primitivesr r r �"cryptography.hazmat.primitives.kdfr r r r= r! r �<module>rW s� �� #� "� "� "� "� "� � � � � � � � � � � @� @� @� @� @� @� @� @� F� F� F� F� F� F� F� F� F� F� D� D� D� D� D� D� � � � � � � � � �D4 � 4 � 4 � 4 � 4 �&� 4 � 4 � 4 � 4 � 4 r!
Back to File Manager