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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|��tvrtd���d��fd�|D����}|dd�|dd�ks|dd	�|d	d�krtd
���|S)amSet 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}tdd��D]
}|||z	dzz}�|dz|zS)N���)�range)�key_byte�parity�is   �t/builddir/build/BUILD/imunify360-venv-2.6.0/opt/imunify360/venv/lib64/python3.11/site-packages/Crypto/Cipher/DES3.py�parity_bytez&adjust_key_parity.<locals>.parity_byteIsB�����q�!���	*�	*�A��x�1�}��)�)�F�F��4��6�)�)�zNot a valid TDES keyrc	�Z��g|]'}t�t|��������(S�)rr)�.0�xrs  �r�
<listcomp>z%adjust_key_parity.<locals>.<listcomp>Rs1���E�E�E���k�k�$�q�'�'�2�2�3�3�E�E�ErNr�i�i����z(Triple DES key degenerates to single DES)�len�key_size�
ValueError�join)�key_in�key_outrs  @r�adjust_key_parityr$<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��Nrc���	|�d��}n#t$rtd���wxYwtt	|����}t
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j}t��}||tt|����|�����}|rtd|z���t|���|��S)z}This method instantiates and returns a handle to a low-level base cipher.
    It will absorb named parameters in the process.�keyzMissing 'key' parameterz,Error %X while instantiating the TDES cipher)�pop�KeyError�	TypeErrorr$r�
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���n�5�5�5s��2c�P�ttjt||g|�Ri|��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<rs.��x�#�+�h�/��d�L�T�L�L�L�V�L�L�Lrr������	r)r�)�__doc__r6�
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