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편집 파일: CAST.cpython-311.pyc
� O�Dg� � � � d Z ddlZddlmZ ddlmZ ddlmZmZm Z m Z m Z edd� � Z d� Z d � Zd Zd Zd Zd ZdZdZdZdZ ed d� � ZdS )a� Module's constants for the modes of operation supported with CAST: :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)�load_pycryptodome_raw_lib� VoidPointer� SmartPointer�c_size_t� c_uint8_ptrzCrypto.Cipher._raw_casta� int CAST_start_operation(const uint8_t key[], size_t key_len, void **pResult); int CAST_encrypt(const void *state, const uint8_t *in, uint8_t *out, size_t data_len); int CAST_decrypt(const void *state, const uint8_t *in, uint8_t *out, size_t data_len); int CAST_stop_operation(void *state); c � � | � d� � }n # t $ r t d� � �w xY wt |� � t vr t dt |� � z � � �t j }t j }t � � } |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$Incorrect CAST key length (%d bytes)z,Error %X while instantiating the CAST cipher)�pop�KeyError� TypeError�len�key_size� ValueError� _raw_cast_lib�CAST_start_operation�CAST_stop_operationr r r � address_ofr �get)�dict_parametersr �start_operation�stop_operation�cipher�results �t/builddir/build/BUILD/imunify360-venv-2.4.0/opt/imunify360/venv/lib64/python3.11/site-packages/Crypto/Cipher/CAST.py�_create_base_cipherr < s � �3� �!�!�%�(�(���� � 3� 3� 3��1�2�2�2�3���� �3�x�x�x� � ��?�#�c�(�(�J�K�K�K�#�8�O�"�6�N� �]�]�F� �_�[�� -� -� %�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 CAST cipher :param key: The secret key to use in the symmetric cipher. Its length can vary from 5 to 16 bytes. :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 CAST object, of the applicable mode. )r �sys�modules�__name__)r �mode�args�kwargss r �newr% V s. � �x �#�+�h�/��d� L�T� L� L� L�V� L� L�L� � � � � � � � � � )�__doc__r � Crypto.Cipherr �Crypto.Util.py3compatr �Crypto.Util._raw_apir r r r r r r r% �MODE_ECB�MODE_CBC�MODE_CFB�MODE_OFB�MODE_CTR� MODE_OPENPGP�MODE_EAX� block_size�ranger � r& r �<module>r> s ��, � � � � � � (� (� (� (� (� (� -� -� -� -� -� -�9� 9� 9� 9� 9� 9� 9� 9� 9� 9� 9� 9� 9� 9� *�)�-� �� � �$6� 6� 6�4<M� <M� <M�| �� �� �� �� ��� � �� � � �5��F� � ���r&