---

Blowfish.py

# -*- coding: utf-8 -*- # # Cipher/Blowfish.py : Blowfish # # =================================================================== # The contents of this file are dedicated to the public domain. To # the extent that dedication to the public domain is not available, # everyone is granted a worldwide, perpetual, royalty-free, # non-exclusive license to exercise all rights associated with the # contents of this file for any purpose whatsoever. # No rights are reserved. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS # BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE # SOFTWARE. # =================================================================== """ Module's constants for the modes of operation supported with Blowfish: :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>` """ import sys from Crypto.Cipher import _create_cipher from Crypto.Util._raw_api import (load_pycryptodome_raw_lib, VoidPointer, SmartPointer, c_size_t, c_uint8_ptr) _raw_blowfish_lib = load_pycryptodome_raw_lib( "Crypto.Cipher._raw_blowfish", """ int Blowfish_start_operation(const uint8_t key[], size_t key_len, void **pResult); int Blowfish_encrypt(const void *state, const uint8_t *in, uint8_t *out, size_t data_len); int Blowfish_decrypt(const void *state, const uint8_t *in, uint8_t *out, size_t data_len); int Blowfish_stop_operation(void *state); """ ) def _create_base_cipher(dict_parameters): """This method instantiates and returns a smart pointer to a low-level base cipher. It will absorb named parameters in the process.""" try: key = dict_parameters.pop("key") except KeyError: raise TypeError("Missing 'key' parameter") if len(key) not in key_size: raise ValueError("Incorrect Blowfish key length (%d bytes)" % len(key)) start_operation = _raw_blowfish_lib.Blowfish_start_operation stop_operation = _raw_blowfish_lib.Blowfish_stop_operation void_p = VoidPointer() result = start_operation(c_uint8_ptr(key), c_size_t(len(key)), void_p.address_of()) if result: raise ValueError("Error %X while instantiating the Blowfish cipher" % result) return SmartPointer(void_p.get(), stop_operation) def new(key, mode, *args, **kwargs): """Create a new Blowfish cipher :param key: The secret key to use in the symmetric cipher. Its length can vary from 5 to 56 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 Blowfish object, of the applicable mode. """ return _create_cipher(sys.modules[__name__], key, mode, *args, **kwargs) MODE_ECB = 1 MODE_CBC = 2 MODE_CFB = 3 MODE_OFB = 5 MODE_CTR = 6 MODE_OPENPGP = 7 MODE_EAX = 9 # Size of a data block (in bytes) block_size = 8 # Size of a key (in bytes) key_size = range(4, 56 + 1)

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docroot: /home/induvedam/public_html

---

curdir: /opt/imunify360/venv/lib/python3.11/site-packages/Crypto/Cipher

	.		4096
	..		4096
X	AES.py		8918
X	AES.pyi		3716
X	ARC2.py		7010
X	ARC2.pyi		980
X	ARC4.py		5116
X	ARC4.pyi		413
X	Blowfish.py		5964
X	Blowfish.pyi		1016
X	CAST.py		6071
X	CAST.pyi		981
X	ChaCha20.py		10736
X	ChaCha20.pyi		788
X	ChaCha20_Poly1305.py		11561
X	ChaCha20_Poly1305.pyi		1106
X	DES.py		5947
X	DES.pyi		961
X	DES3.py		6925
X	DES3.pyi		1031
X	PKCS1_OAEP.py		8827
X	PKCS1_OAEP.pyi		1179
X	PKCS1_v1_5.py		8141
X	PKCS1_v1_5.pyi		686
X	Salsa20.py		6349
X	Salsa20.pyi		751
X	_ARC4.abi3.so		15944
X	_EKSBlowfish.py		5205
X	_EKSBlowfish.pyi		266
X	_Salsa20.abi3.so		16088
X	__init__.py		2844
X	__init__.pyi		0
	__pycache__		4096
X	_chacha20.abi3.so		16064
X	_mode_cbc.py		10888
X	_mode_cbc.pyi		687
X	_mode_ccm.py		24375
X	_mode_ccm.pyi		1600
X	_mode_cfb.py		10721
X	_mode_cfb.pyi		727
X	_mode_ctr.py		15812
X	_mode_ctr.pyi		800
X	_mode_eax.py		14453
X	_mode_eax.pyi		1545
X	_mode_ecb.py		8309
X	_mode_ecb.pyi		592
X	_mode_gcm.py		21297
X	_mode_gcm.pyi		1541
X	_mode_ocb.py		19935
X	_mode_ocb.pyi		1231
X	_mode_ofb.py		10209
X	_mode_ofb.pyi		691
X	_mode_openpgp.py		7053
X	_mode_openpgp.pyi		556
X	_mode_siv.py		13977
X	_mode_siv.pyi		1261
X	_pkcs1_decode.abi3.so		15960
X	_raw_aes.abi3.so		32720
X	_raw_aesni.abi3.so		20384
X	_raw_arc2.abi3.so		20168
X	_raw_blowfish.abi3.so		24248
X	_raw_cast.abi3.so		28584
X	_raw_cbc.abi3.so		15936
X	_raw_cfb.abi3.so		16232
X	_raw_ctr.abi3.so		16280
X	_raw_des.abi3.so		49248
X	_raw_des3.abi3.so		49256
X	_raw_ecb.abi3.so		15784
X	_raw_eksblowfish.abi3.so		32456
X	_raw_ocb.abi3.so		20296
X	_raw_ofb.abi3.so		15944