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Editing: cSHAKE128.cpython-311.pyc
� 8�tc. � �t � d dl mZ d dlmZmZmZmZmZmZ d dl m Z d� Z d� Z d� Z G d� de� � Zd d �Zd S ) � )�bchr)� VoidPointer� SmartPointer�create_string_buffer�get_raw_buffer�c_size_t� c_uint8_ptr)�_raw_keccak_libc � � | ddz k r| dk sJ �| dk rdn| � � � dz dz }t |� � t | dz � � z }| dz } | dk r |t | dz � � z }| dz } | dk � |S )z2Left encode function as defined in NIST SP 800-185� � r � � � )� bit_lengthr )�x�num�encs �;/usr/lib/python3/dist-packages/Cryptodome/Hash/cSHAKE128.py� _left_encoder ) s� � � ��d��O�O��Q����� �A�v�v�!�!�A�L�L�N�N�Q� .�1�4�C� �s�)�)�d�1�t�8�n�n� $�C��!�G�A� �a�%�%��D��T��N�N�"�� �a��� �a�%�%� �J� c �z � t | � � dz }|ddz k rt d� � �t |� � | z S )z4Encode string function as defined in NIST SP 800-185r r r z$String too large to encode in cSHAKE)�len� ValueErrorr )r �bitlens r � _encode_strr ; sD � � ��V�V�a�Z�F� �!�t�)� � ��?�@�@�@� �� � �!� #�#r c �f � t |� � | z }|t |� � |z z |z }|d|z z S )z2Zero pad byte string as defined in NIST SP 800-185� )r r )r �length�to_pad�npads r �_bytepadr" E sA � � �&� !� !�A� %�F� �S��[�[�6�)� )�V� 3�D� �G�d�N� "�"r c �$ � e Zd ZdZd� Zd� Zd� ZdS )� cSHAKE_XOFz]A cSHAKE hash object. Do not instantiate directly. Use the :func:`new` function. c � � t � � }|r8t d� � t |� � z }t |d|z dz � � }d}nd }d}t j |� � � t |dz � � |� � }|rt d|z � � �t |� � � t j � � | _ d| _ |r| � |� � |r| � |� � d S d S )Nr i@ r � � z#Error %d while instantiating cSHAKEF)r r r" r � keccak_init� address_ofr r r �get�keccak_destroy�_state� _is_squeezing�update) �self�data�custom�capacity�state� prefix_unpad�prefix�pad�results r �__init__zcSHAKE_XOF.__init__W s � �� � �� � �&�s�+�+�k�&�.A�.A�A�L� �l�T�H�_�q�,@�A�A�F��C�C��F��C� �,�U�-=�-=�-?�-?�-5�h��k�-B�-B�-0�2� 2�� � '� � B� %� &� '� '� '�"�5�9�9�;�;�#2�#A�C� C�� � "��� � � �K�K�� � � � � � �K�K�� � � � � � � r c � � | j rt d� � �t j | j � � � t |� � t t |� � � � � � }|rt d|| j fz � � �| S )z�Continue hashing of a message by consuming the next chunk of data. Args: data (byte string/byte array/memoryview): The next chunk of the message being hashed. z/You cannot call 'update' after the first 'read'z Error %d while updating %s state) r- � TypeErrorr � keccak_absorbr, r* r r r r �name)r/ r0 r7 s r r. zcSHAKE_XOF.updater s� � � � � O�� M�N�N� N� �.�t�{���/@�/@�/:�4�/@�/@�/7��D� � �/B�/B�D� D�� � 4� � ?� &�� � 2� 3� 4� 4� 4�� r c � � d| _ t |� � }t j | j � � � |t |� � � � }|rt d|| j fz � � �t |� � S )ah Compute the next piece of XOF output. .. note:: You cannot use :meth:`update` anymore after the first call to :meth:`read`. Args: length (integer): the amount of bytes this method must return :return: the next piece of XOF output (of the given length) :rtype: byte string Tz!Error %d while extracting from %s) r- r r �keccak_squeezer, r* r r r< r )r/ r �bfrr7 s r �readzcSHAKE_XOF.read� s� � � "���"�6�*�*�� �/�� ���0A�0A�03�08��0@�0@�B� B�� � 4� � @� &�� � 2� 3� 4� 4� 4� �c�"�"�"r N)�__name__� __module__� __qualname__�__doc__r8 r. r@ � r r r$ r$ Q sK � � � � � �� � � � �6� � �$#� #� #� #� #r r$ Nr c �$ � t | |d� � S )az Return a fresh instance of a cSHAKE128 object. Args: data (bytes/bytearray/memoryview): Optional. The very first chunk of the message to hash. It is equivalent to an early call to :meth:`update`. custom (bytes): Optional. A customization bytestring (``S`` in SP 800-185). :Return: A :class:`cSHAKE_XOF` object � )r$ )r0 r1 s r �newrH � s � � �d�F�C� (� (�(r )Nr )�Cryptodome.Util.py3compatr �Cryptodome.Util._raw_apir r r r r r �Cryptodome.Hash.keccakr r r r" �objectr$ rH rE r r �<module>rM s� ��> +� *� *� *� *� *�/� /� /� /� /� /� /� /� /� /� /� /� /� /� /� /� 3� 2� 2� 2� 2� 2�� � �$$� $� $� #� #� #�K#� K#� K#� K#� K#�� K#� K#� K#�\)� )� )� )� )� )r
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