Viewing File: /opt/imunify360/venv/lib/python3.11/site-packages/Crypto/Cipher/__pycache__/DES3.cpython-311.pyc



]j
dZddlZddlmZddlmZmZmZmZddl	m
Z
mZmZm
Z
e
ddZdZd	Zd
ZdZd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_stringbchrbordbstr)load_pycryptodome_raw_libVoidPointerSmartPointerc_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);
                    cdt|tvrtddfd|D}|dd|ddks|dd	|d	dkrtd
|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
    cRd}tddD]
}|||z	dzz}|dz|zS)N)range)key_byteparityis   t/builddir/build/BUILD/imunify360-venv-2.6.3/opt/imunify360/venv/lib64/python3.11/site-packages/Crypto/Cipher/DES3.pyparity_bytez&adjust_key_parity.<locals>.parity_byteIsBq!	*	*Ax1}))FF46))zNot a valid TDES keyrc	Zg|]'}tt|(S)rr).0xrs  r
<listcomp>z%adjust_key_parity.<locals>.<listcomp>Rs1EEEkk$q''2233EEErNriiz(Triple DES key degenerates to single DES)lenkey_size
ValueErrorjoin)key_inkey_outrs  @radjust_key_parityr$<s***6{{(""/000hhEEEEVEEEFFGrr{gadm##ws2v'"##,'F'FCDDDNrc	|d}n#t$rtdwxYwtt	|}t
j}t
j}t}||tt||}|rtd|zt||S)z}This method instantiates and returns a handle to a low-level base cipher.
    It will absorb named parameters in the process.keyzMissing 'key' parameterz,Error %X while instantiating the TDES cipher)popKeyError	TypeErrorr$r
_raw_des3_libDES3_start_operationDES3_stop_operationr	rr
address_ofr r
get)dict_parametersr"r&start_operationstop_operationcipherresults       r_create_base_cipherr4Zs3 $$U++33312223DLL
)
)C#8O"6N
]]F
_S%c#hh//#..0022F#G!"##	#

n555s2cPttjt||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.
    )rsysmodules__name__)r&modeargskwargss    rnewr<rs.x#+h/dLTLLLVLLLrr	r)r)__doc__r6
Crypto.CipherrCrypto.Util.py3compatrrrrCrypto.Util._raw_apirr	r
rr*r$r4r<MODE_ECBMODE_CBCMODE_CFBMODE_OFBMODE_CTRMODE_OPENPGPMODE_EAX
block_sizerrrr<module>rPs,




((((((????????????,,,,,,,,,,,,*)-

$<6660<M<M<M|

r
Back to Directory File Manager