,h dZddlZddlmZddlmZmZmZmZddl m Z m Z m Z m Z e ddZdZd Zd Zd Zd Zd ZdZdZdZdZdZdZy)a Module's constants for the modes of operation supported with Triple DES: :var MODE_ECB: :ref:`Electronic Code Book (ECB) ` :var MODE_CBC: :ref:`Cipher-Block Chaining (CBC) ` :var MODE_CFB: :ref:`Cipher FeedBack (CFB) ` :var MODE_OFB: :ref:`Output FeedBack (OFB) ` :var MODE_CTR: :ref:`CounTer Mode (CTR) ` :var MODE_OPENPGP: :ref:`OpenPGP Mode ` :var MODE_EAX: :ref:`EAX Mode ` N)_create_cipher) byte_stringbchrbordbstr)load_pycryptodome_raw_lib VoidPointer 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); c d}t|tvr tddj|Dcgc]}t |t |c}}|dd|ddk(s |dd|ddk(r td |Scc}w) 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 cNd}tddD] }|||z dzz}|dz|zS)N)range)key_byteparityis T/var/www/html/Resume-Scraper/venv/lib/python3.12/site-packages/Crypto/Cipher/DES3.py parity_bytez&adjust_key_parity..parity_byteIs>q! *A x1}) )F *46))zNot a valid TDES keyrNriiz(Triple DES key degenerates to single DES)lenkey_size ValueErrorjoinrr)key_inrxkey_outs radjust_key_parityr <s*  6{("/00hhVEk$q'23EFGr{gam#ws2'"#,'FCDD N Fs!A:cz |jd}tt |}t j }t j}t}||tt||j}|rtd|zt|j|S#t$r tdwxYw)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 r r address_ofrr get)dict_parametersrr"start_operationstop_operationcipherresults r_create_base_cipherr0Zs3 $$U+ DL )C#88O"66N ]F S%c#h/#..02FG!"# #  n 55 31223s B%%B:cNttjt||g|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. )rsysmodules__name__)r"modeargskwargss rnewr8rs'x #++h/d LT LV LLrr r)r)__doc__r2 Crypto.CipherrCrypto.Util.py3compatrrrrCrypto.Util._raw_apirr r r r&r r0r8MODE_ECBMODE_CBCMODE_CFBMODE_OFBMODE_CTR MODE_OPENPGPMODE_EAX block_sizerrrrMsx,  (??,,*-  $<60<M|       r