golden hour

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

File/Folder	Size	Actions
AES.py	8.71 KB
AES.pyi	3.63 KB
ARC2.py	6.85 KB
ARC2.pyi	980 B
ARC4.py	5 KB
ARC4.pyi	413 B
Blowfish.py	5.82 KB
Blowfish.pyi	1016 B
CAST.py	5.93 KB
CAST.pyi	981 B
ChaCha20.py	10.48 KB
ChaCha20.pyi	788 B
ChaCha20_Poly1305.py	11.29 KB
ChaCha20_Poly1305.pyi	1.08 KB
DES.py	5.81 KB
DES.pyi	961 B
DES3.py	6.76 KB
DES3.pyi	1.01 KB
PKCS1_OAEP.py	8.62 KB
PKCS1_OAEP.pyi	1.15 KB
PKCS1_v1_5.py	7.95 KB
PKCS1_v1_5.pyi	686 B
Salsa20.py	6.2 KB
Salsa20.pyi	751 B
_ARC4.abi3.so	20.52 KB
_EKSBlowfish.py	5.08 KB
_EKSBlowfish.pyi	266 B
_Salsa20.abi3.so	26.38 KB
__init__.py	2.78 KB
__init__.pyi	0 B
__pycache__	-
_chacha20.abi3.so	29.91 KB
_mode_cbc.py	10.63 KB
_mode_cbc.pyi	687 B
_mode_ccm.py	23.8 KB
_mode_ccm.pyi	1.56 KB
_mode_cfb.py	10.47 KB
_mode_cfb.pyi	727 B
_mode_ctr.py	15.44 KB
_mode_ctr.pyi	800 B
_mode_eax.py	14.11 KB
_mode_eax.pyi	1.51 KB
_mode_ecb.py	8.11 KB
_mode_ecb.pyi	592 B
_mode_gcm.py	20.8 KB
_mode_gcm.pyi	1.5 KB
_mode_ocb.py	19.47 KB
_mode_ocb.pyi	1.2 KB
_mode_ofb.py	9.97 KB
_mode_ofb.pyi	691 B
_mode_openpgp.py	6.89 KB
_mode_openpgp.pyi	556 B
_mode_siv.py	13.65 KB
_mode_siv.pyi	1.23 KB
_pkcs1_decode.abi3.so	34.85 KB
_raw_aes.abi3.so	104.3 KB
_raw_aesni.abi3.so	103.89 KB
_raw_arc2.abi3.so	45.38 KB
_raw_blowfish.abi3.so	76.8 KB
_raw_cast.abi3.so	56.06 KB
_raw_cbc.abi3.so	22.46 KB
_raw_cfb.abi3.so	26.23 KB
_raw_ctr.abi3.so	30.6 KB
_raw_des.abi3.so	69.88 KB
_raw_des3.abi3.so	70.82 KB
_raw_ecb.abi3.so	18.57 KB
_raw_eksblowfish.abi3.so	176.95 KB
_raw_ocb.abi3.so	44.78 KB
_raw_ofb.abi3.so	21.61 KB

Edit: _mode_openpgp.py

# ===================================================================
#
# Copyright (c) 2014, Legrandin <helderijs@gmail.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in
#    the documentation and/or other materials provided with the
#    distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# ===================================================================

"""
OpenPGP mode.
"""

__all__ = ['OpenPgpMode']

from Crypto.Util.py3compat import _copy_bytes
from Crypto.Random import get_random_bytes

class OpenPgpMode(object):
    """OpenPGP mode.

This mode is a variant of CFB, and it is only used in PGP and
    OpenPGP_ applications. If in doubt, use another mode.

An Initialization Vector (*IV*) is required.

Unlike CFB, the *encrypted* IV (not the IV itself) is
    transmitted to the receiver.

The IV is a random data block. For legacy reasons, two of its bytes are
    duplicated to act as a checksum for the correctness of the key, which is now
    known to be insecure and is ignored. The encrypted IV is therefore 2 bytes
    longer than the clean IV.

.. _OpenPGP: http://tools.ietf.org/html/rfc4880

:undocumented: __init__
    """

def __init__(self, factory, key, iv, cipher_params):

#: The block size of the underlying cipher, in bytes.
        self.block_size = factory.block_size

self._done_first_block = False  # True after the first encryption

# Instantiate a temporary cipher to process the IV
        IV_cipher = factory.new(
                        key,
                        factory.MODE_CFB,
                        IV=b'\x00' * self.block_size,
                        segment_size=self.block_size * 8,
                        **cipher_params)

iv = _copy_bytes(None, None, iv)

# The cipher will be used for...
        if len(iv) == self.block_size:
            # ... encryption
            self._encrypted_IV = IV_cipher.encrypt(iv + iv[-2:])
        elif len(iv) == self.block_size + 2:
            # ... decryption
            self._encrypted_IV = iv
            # Last two bytes are for a deprecated "quick check" feature that
            # should not be used. (https://eprint.iacr.org/2005/033)
            iv = IV_cipher.decrypt(iv)[:-2]
        else:
            raise ValueError("Length of IV must be %d or %d bytes"
                             " for MODE_OPENPGP"
                             % (self.block_size, self.block_size + 2))

self.iv = self.IV = iv

# Instantiate the cipher for the real PGP data
        self._cipher = factory.new(
                            key,
                            factory.MODE_CFB,
                            IV=self._encrypted_IV[-self.block_size:],
                            segment_size=self.block_size * 8,
                            **cipher_params)

def encrypt(self, plaintext):
        """Encrypt data with the key and the parameters set at initialization.

A cipher object is stateful: once you have encrypted a message
        you cannot encrypt (or decrypt) another message using the same
        object.

The data to encrypt can be broken up in two or
        more pieces and `encrypt` can be called multiple times.

That is, the statement:

>>> c.encrypt(a) + c.encrypt(b)

is equivalent to:

>>> c.encrypt(a+b)

This function does not add any padding to the plaintext.

:Parameters:
          plaintext : bytes/bytearray/memoryview
            The piece of data to encrypt.

:Return:
            the encrypted data, as a byte string.
            It is as long as *plaintext* with one exception:
            when encrypting the first message chunk,
            the encypted IV is prepended to the returned ciphertext.
        """

res = self._cipher.encrypt(plaintext)
        if not self._done_first_block:
            res = self._encrypted_IV + res
            self._done_first_block = True
        return res

def decrypt(self, ciphertext):
        """Decrypt 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.

:Return: the decrypted data (byte string).
        """

return self._cipher.decrypt(ciphertext)

def _create_openpgp_cipher(factory, **kwargs):
    """Create a new block cipher, configured in OpenPGP mode.

:Parameters:
      factory : module
        The module.

:Keywords:
      key : bytes/bytearray/memoryview
        The secret key to use in the symmetric cipher.

IV : bytes/bytearray/memoryview
        The initialization vector to use for encryption or decryption.

For encryption, the IV must be as long as the cipher block size.

For decryption, it must be 2 bytes longer (it is actually the
        *encrypted* IV which was prefixed to the ciphertext).
    """

iv = kwargs.pop("IV", None)
    IV = kwargs.pop("iv", None)

if (None, None) == (iv, IV):
        iv = get_random_bytes(factory.block_size)
    if iv is not None:
        if IV is not None:
            raise TypeError("You must either use 'iv' or 'IV', not both")
    else:
        iv = IV

try:
        key = kwargs.pop("key")
    except KeyError as e:
        raise TypeError("Missing component: " + str(e))

return OpenPgpMode(factory, key, iv, kwargs)