Viewing File: /opt/imunify360/venv/lib/python3.11/site-packages/Crypto/Cipher/__pycache__/CAST.cpython-311.pyc



]jdZddlZddlmZddlmZddlmZmZm	Z	m
Z
mZeddZdZ
d	Zd
ZdZdZd
ZdZdZdZdZed
dZdS)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_libVoidPointerSmartPointerc_size_tc_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$rtdwxYwt|tvrtdt|ztj}tj}t}|t|tt||}|rtd|zt||S)z}This method instantiates and returns a handle to a low-level
    base cipher. It will absorb named parameters in the process.keyzMissing 'key' parameterz$Incorrect CAST key length (%d bytes)z,Error %X while instantiating the CAST cipher)popKeyError	TypeErrorlenkey_size
ValueError
_raw_cast_libCAST_start_operationCAST_stop_operationrr	r
address_ofrget)dict_parametersrstart_operationstop_operationcipherresults      t/builddir/build/BUILD/imunify360-venv-2.6.3/opt/imunify360/venv/lib64/python3.11/site-packages/Crypto/Cipher/CAST.py_create_base_cipherr<s3!!%((333122233xxx?#c((JKKK#8O"6N
]]F
_[--%c#hh//#..0022F#G!"##	#

n555s2cPttjt||g|Ri|S)aCreate 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.
    )rsysmodules__name__)rmodeargskwargss    rnewr%Vs.x#+h/dLTLLLVLLL	)__doc__r
Crypto.CipherrCrypto.Util.py3compatrCrypto.Util._raw_apirrrrr	rrr%MODE_ECBMODE_CBCMODE_CFBMODE_OFBMODE_CTRMODE_OPENPGPMODE_EAX
block_sizerangerr&r<module>r>s,




((((((------99999999999999*)-

$6664<M<M<M|

5Fr&
Back to Directory File Manager