+ '(j*~RtR.t^RIHt^RIHtHtHtHtH t H t H t H t ^RI Ht]!RR4t!RR]4tRtR #) z' Ciphertext Block Chaining (CBC) mode. CbcMode) _copy_bytes)load_pycryptodome_raw_lib VoidPointercreate_string_bufferget_raw_buffer SmartPointerc_size_t c_uint8_ptris_writeable_buffer)get_random_byteszCrypto.Cipher._raw_cbca int CBC_start_operation(void *cipher, const uint8_t iv[], size_t iv_len, void **pResult); int CBC_encrypt(void *cbcState, const uint8_t *in, uint8_t *out, size_t data_len); int CBC_decrypt(void *cbcState, const uint8_t *in, uint8_t *out, size_t data_len); int CBC_stop_operation(void *state); c>a]tRt^?toRtRtRRltRRltRtVt R#)ra?*Cipher-Block Chaining (CBC)*. Each of the ciphertext blocks depends on the current and all previous plaintext blocks. An Initialization Vector (*IV*) is required. See `NIST SP800-38A`_ , Section 6.2 . .. _`NIST SP800-38A` : http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf :undocumented: __init__ c  \4Vn\PVP 4\ V4\ \V44VPP44pV'd\RV,4h\VPP 4\P4VnVP4\V4Vn \RRV4VnVPVnRR.VnR#)aCreate a new block cipher, configured in CBC mode. :Parameters: block_cipher : C pointer A smart pointer to the low-level block cipher instance. iv : bytes/bytearray/memoryview The initialization vector to use for encryption or decryption. It is as long as the cipher block. **The IV must be unpredictable**. Ideally it is picked randomly. Reusing the *IV* for encryptions performed with the same key compromises confidentiality. z)Error %d while instantiating the CBC modeNencryptdecrypt)r_state raw_cbc_libCBC_start_operationgetr r len address_of ValueErrorrCBC_stop_operationrelease block_sizerivIV_next)self block_cipherrresults&&& L/home/ubuntu/cf-venv/lib/python3.14/site-packages/Crypto/Cipher/_mode_cbc.py__init__CbcMode.__init__Ns""m 001A1A1C1>> c.encrypt(a) + c.encrypt(b) is equivalent to: >>> c.encrypt(a+b) That also means that you cannot reuse an object for encrypting or decrypting other data with the same key. This function does not add any padding to the plaintext. :Parameters: plaintext : bytes/bytearray/memoryview The piece of data to encrypt. Its lenght must be multiple of the cipher block size. :Keywords: output : bytearray/memoryview The location where the ciphertext must be written to. If ``None``, the ciphertext is returned. :Return: If ``output`` is ``None``, the ciphertext is returned as ``bytes``. Otherwise, ``None``. rz*encrypt() cannot be called after decrypt()N4output must be a bytearray or a writeable memoryview9output must have the same length as the input (%d bytes)3Data must be padded to %d byte boundary in CBC modez%Error %d while encrypting in CBC mode)r TypeErrorrrr rr CBC_encryptrrr r rr)r plaintextoutput ciphertextr s&&& r!rCbcMode.encrypt}s H DJJ &HI I[ >-c)n=JJ&v.. VWW9~V, "025i."ABB(():)4Y)?)4Z)@)1#i.)AC { !VY]YhYh!hiiDvMN N >!*- -r$c  dRVP9d \R4hR.VnVf\\V44pMRTp\ V4'g \R4h\V4\V48wd\ R\V4,4h\ PVPP4\V4\V4\\V444pV'd6V^8Xd\ RVP,4h\ RV,4hVf \V4#R#)adDecrypt data with the key and the parameters set at initialization. A cipher object is stateful: once you have decrypted a message you cannot decrypt (or encrypt) another message with the same object. The data to decrypt can be broken up in two or more pieces and `decrypt` can be called multiple times. That is, the statement: >>> c.decrypt(a) + c.decrypt(b) is equivalent to: >>> c.decrypt(a+b) This function does not remove any padding from the plaintext. :Parameters: ciphertext : bytes/bytearray/memoryview The piece of data to decrypt. Its length must be multiple of the cipher block size. :Keywords: output : bytearray/memoryview The location where the plaintext must be written to. If ``None``, the plaintext is returned. :Return: If ``output`` is ``None``, the plaintext is returned as ``bytes``. Otherwise, ``None``. rz*decrypt() cannot be called after encrypt()Nr&r'r(z%Error %d while decrypting in CBC mode)rr)rrr rr CBC_decryptrrr r rr)rr-r,r+r s&&& r!rCbcMode.decrypts B DJJ &HI I[ >,S_=II&v.. VWW:#f+- "025i."ABB(():)4Z)@)4Y)?)1#j/)BD { !VY]YhYh!hiiDvMN N >!), ,r$)rrrrr)N) __name__ __module__ __qualname____firstlineno____doc__r"rr__static_attributes____classdictcell__) __classdict__s@r!rr?s! -,^@D==r$c VPV4pVPRR4pVPRR4pRW438Xd\VP4pVeVe \ R4hMTp\ V4VP8wd\ RVP,4hV'd\ R\V4,4h\W#4#)aInstantiate a cipher object that performs CBC encryption/decryption. :Parameters: factory : module The underlying block cipher, a module from ``Crypto.Cipher``. :Keywords: iv : bytes/bytearray/memoryview The IV to use for CBC. IV : bytes/bytearray/memoryview Alias for ``iv``. Any other keyword will be passed to the underlying block cipher. See the relevant documentation for details (at least ``key`` will need to be present). rNrz*You must either use 'iv' or 'IV', not bothz.Incorrect IV length (it must be %d bytes long)zUnknown parameters for CBC: %s)NN) _create_base_cipherpopr rr)rrstrr)factorykwargs cipher_staterrs&, r!_create_cbc_cipherrAs&..v6L D$ B D$ Bx g00 1 ~ >HI I  2w'$$$I ++,- -83v;FGG < $$r$N)r6__all__Crypto.Util.py3compatrCrypto.Util._raw_apirrrrrr r r Crypto.Randomr robjectrrAr$r!rHsQ> +-777 +'(@C $}f}@&%r$