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Editing: DES3.cpython-311.pyc
� � �i � � � d Z ddlZddlmZ ddlmZmZmZmZ ddl m Z m Z m Z m Z e dd� � Zd� Zd � Zd � Zd Zd Zd ZdZdZdZdZdZdZdS )a� Module's constants for the modes of operation supported with Triple DES: :var MODE_ECB: :ref:`Electronic Code Book (ECB) <ecb_mode>` :var MODE_CBC: :ref:`Cipher-Block Chaining (CBC) <cbc_mode>` :var MODE_CFB: :ref:`Cipher FeedBack (CFB) <cfb_mode>` :var MODE_OFB: :ref:`Output FeedBack (OFB) <ofb_mode>` :var MODE_CTR: :ref:`CounTer Mode (CTR) <ctr_mode>` :var MODE_OPENPGP: :ref:`OpenPGP Mode <openpgp_mode>` :var MODE_EAX: :ref:`EAX Mode <eax_mode>` � N)�_create_cipher)� byte_string�bchr�bord�bstr)�load_pycryptodome_raw_lib� VoidPointer� SmartPointer�c_size_tzCrypto.Cipher._raw_des3a� int DES3_start_operation(const uint8_t key[], size_t key_len, void **pResult); int DES3_encrypt(const void *state, const uint8_t *in, uint8_t *out, size_t data_len); int DES3_decrypt(const void *state, const uint8_t *in, uint8_t *out, size_t data_len); int DES3_stop_operation(void *state); c � �� d� �t | � � t vrt d� � �d� �fd�| D � � � � }|dd� |dd� k s|dd � |d d� k rt d � � �|S ) am Set the parity bits in a TDES key. :param key_in: the TDES key whose bits need to be adjusted :type key_in: byte string :returns: a copy of ``key_in``, with the parity bits correctly set :rtype: byte string :raises ValueError: if the TDES key is not 16 or 24 bytes long :raises ValueError: if the TDES key degenerates into Single DES c �R � d}t dd� � D ] }|| |z dz z }�| dz |z S )N� � � )�range)�key_byte�parity�is �t/builddir/build/BUILD/imunify360-venv-2.6.2/opt/imunify360/venv/lib64/python3.11/site-packages/Crypto/Cipher/DES3.py� parity_bytez&adjust_key_parity.<locals>.parity_byteI sB � ����q�!��� *� *�A� �x�1�}��)� )�F�F��4��6�)�)� zNot a valid TDES keyr c �Z �� g | ]'}t �t |� � � � � � ��(S � )r r )�.0�xr s �r � <listcomp>z%adjust_key_parity.<locals>.<listcomp>R s1 �� �E�E�E���k�k�$�q�'�'� 2� 2�3�3�E�E�Er Nr � i�i����z(Triple DES key degenerates to single DES)�len�key_size� ValueError�join)�key_in�key_outr s @r �adjust_key_parityr$ < s� �� �*� *� *� �6�{�{�(�"�"��/�0�0�0��h�h�E�E�E�E�V�E�E�E�F�F�G��r��r�{�g�a��d�m�#�#�w�s�2�v��'�"�#�#�,�'F�'F��C�D�D�D� �Nr c �� � | � d� � }n # t $ r t d� � �w xY wt t |� � � � }t j }t j }t � � } ||t t |� � � � |� � � � � }|rt d|z � � �t |� � � |� � S )z}This method instantiates and returns a handle to a low-level base cipher. It will absorb named parameters in the process.�keyzMissing 'key' parameterz,Error %X while instantiating the TDES cipher)�pop�KeyError� TypeErrorr$ r � _raw_des3_lib�DES3_start_operation�DES3_stop_operationr r r � address_ofr r �get)�dict_parametersr" r& �start_operation�stop_operation�cipher�results r �_create_base_cipherr4 Z s� � �3� �$�$�U�+�+���� � 3� 3� 3��1�2�2�2�3���� �D��L�L� )� )�C�#�8�O�"�6�N� �]�]�F� �_�S� %�c�#�h�h� /� /� #� .� .� 0� 0�2� 2�F� � #��G�!�"� #� #� #� �� � � � �n� 5� 5�5s � �2c �P � t t j t | |g|�R i |��S )a Create a new Triple DES cipher. :param key: The secret key to use in the symmetric cipher. It must be 16 or 24 byte long. The parity bits will be ignored. :type key: bytes/bytearray/memoryview :param mode: The chaining mode to use for encryption or decryption. :type mode: One of the supported ``MODE_*`` constants :Keyword Arguments: * **iv** (*bytes*, *bytearray*, *memoryview*) -- (Only applicable for ``MODE_CBC``, ``MODE_CFB``, ``MODE_OFB``, and ``MODE_OPENPGP`` modes). The initialization vector to use for encryption or decryption. For ``MODE_CBC``, ``MODE_CFB``, and ``MODE_OFB`` it must be 8 bytes long. For ``MODE_OPENPGP`` mode only, it must be 8 bytes long for encryption and 10 bytes for decryption (in the latter case, it is actually the *encrypted* IV which was prefixed to the ciphertext). If not provided, a random byte string is generated (you must then read its value with the :attr:`iv` attribute). * **nonce** (*bytes*, *bytearray*, *memoryview*) -- (Only applicable for ``MODE_EAX`` and ``MODE_CTR``). A value that must never be reused for any other encryption done with this key. For ``MODE_EAX`` there are no restrictions on its length (recommended: **16** bytes). For ``MODE_CTR``, its length must be in the range **[0..7]**. If not provided for ``MODE_EAX``, a random byte string is generated (you can read it back via the ``nonce`` attribute). * **segment_size** (*integer*) -- (Only ``MODE_CFB``).The number of **bits** the plaintext and ciphertext are segmented in. It must be a multiple of 8. If not specified, it will be assumed to be 8. * **mac_len** : (*integer*) -- (Only ``MODE_EAX``) Length of the authentication tag, in bytes. It must be no longer than 8 (default). * **initial_value** : (*integer*) -- (Only ``MODE_CTR``). The initial value for the counter within the counter block. By default it is **0**. :Return: a Triple DES object, of the applicable mode. )r �sys�modules�__name__)r& �mode�args�kwargss r �newr< r s. � �x �#�+�h�/��d� L�T� L� L� L�V� L� L�Lr r � � � � � � r )r � )�__doc__r6 � Crypto.Cipherr �Crypto.Util.py3compatr r r r �Crypto.Util._raw_apir r r r r* r$ r4 r< �MODE_ECB�MODE_CBC�MODE_CFB�MODE_OFB�MODE_CTR� MODE_OPENPGP�MODE_EAX� block_sizer r r r �<module>rP s ��, � � � � � � (� (� (� (� (� (� ?� ?� ?� ?� ?� ?� ?� ?� ?� ?� ?� ?�,� ,� ,� ,� ,� ,� ,� ,� ,� ,� ,� ,� *�)�-� �� � �$� � �<6� 6� 6�0<M� <M� <M�| �� �� �� �� ��� � �� � � ���r
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