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_pkcs5.cpython-39.pyc
a ���gU � @ s� d dl mZmZmZmZ d dlZd dlZd dlZd dlZddl m Z m Z ddl m Z ddlmZmZmZ ejdk rxeZndd � Zd gZd d � Zd e_dS ) � )�unicode_literals�division�absolute_import�print_functionN� )�int_from_bytes� int_to_bytes)�pretty_message)� type_name�byte_cls� int_types)� c C s t | g�S )N)�bytes)�num� r �@/opt/nydus/tmp/pip-target-mke_irhy/lib/python/oscrypto/_pkcs5.py�chr_cls s r �pbkdf2c C s� t |t�s ttdt|����t |t�s8ttdt|����t |t�sTttdt|����|dk rnttdt|����t |t�s�ttdt|����|dk r�ttdt|����| tg d��vr�ttd t| ����t t | �}d d d d ddd�| }t � |d|�}d}d} t | �|k �r�|�� } | �|t�d|� � | �� } t| �} t|d �D ],} |�� } | �| � | �� } | t| �N } �qD| t| |d�7 } |d7 }q�| d|� S )a4 Implements PBKDF2 from PKCS#5 v2.2 in pure Python :param hash_algorithm: The string name of the hash algorithm to use: "md5", "sha1", "sha224", "sha256", "sha384", "sha512" :param password: A byte string of the password to use an input to the KDF :param salt: A cryptographic random byte string :param iterations: The numbers of iterations to use when deriving the key :param key_length: The length of the desired key in bytes :return: The derived key as a byte string z@ password must be a byte string, not %s z< salt must be a byte string, not %s z? iterations must be an integer, not %s r zC iterations must be greater than 0 - is %s z? key_length must be an integer, not %s zC key_length must be greater than 0 - is %s )�md5�sha1�sha224�sha256�sha384�sha512z� hash_algorithm must be one of "md5", "sha1", "sha224", "sha256", "sha384", "sha512", not %s � � � � �0 �@ N� s >I)�widthr )� isinstancer � TypeErrorr r r � ValueError�repr�set�getattr�hashlib�hmac�new�len�copy�update�struct�pack�digestr �ranger )Zhash_algorithm�passwordZsaltZ iterationsZ key_length�algoZ hash_lengthZ original_hmac�block�outputZprf�last�u�_r r r r sz � � �� ��� �� T)� __future__r r r r �sysr( r) r. Z_asn1r r �_errorsr �_typesr r r � version_info�chrr �__all__r Z pure_pythonr r r r �<module> s �t