FM / Cipher

/opt/imh-python/lib/python3.9/site-packages/Cryptodome/Cipher/

/opt/imh-python/lib/python3.9/site-packages/Cryptodome/Cipher

Name	Size	Mode	Actions
__pycache__/	-	0755	rm
AES.py	9569	0644	edit dl rm
AES.pyi	1387	0644	edit dl rm
ARC2.py	7026	0644	edit dl rm
ARC2.pyi	982	0644	edit dl rm
ARC4.py	5168	0644	edit dl rm
ARC4.pyi	431	0644	edit dl rm
Blowfish.py	5976	0644	edit dl rm
Blowfish.pyi	1018	0644	edit dl rm
CAST.py	6087	0644	edit dl rm
CAST.pyi	983	0644	edit dl rm
ChaCha20.py	10754	0644	edit dl rm
ChaCha20.pyi	762	0644	edit dl rm
ChaCha20_Poly1305.py	11561	0644	edit dl rm
ChaCha20_Poly1305.pyi	1068	0644	edit dl rm
DES.py	5963	0644	edit dl rm
DES.pyi	963	0644	edit dl rm
DES3.py	6941	0644	edit dl rm
DES3.pyi	1033	0644	edit dl rm
PKCS1_OAEP.py	8880	0644	edit dl rm
PKCS1_OAEP.pyi	1183	0644	edit dl rm
PKCS1_v1_5.py	7979	0644	edit dl rm
PKCS1_v1_5.pyi	571	0644	edit dl rm
Salsa20.py	6369	0644	edit dl rm
Salsa20.pyi	744	0644	edit dl rm
_ARC4.cpython-39-x86_64-linux-gnu.so	8072	0755	edit dl rm
_chacha20.cpython-39-x86_64-linux-gnu.so	11024	0755	edit dl rm
_EKSBlowfish.py	5217	0644	edit dl rm
_EKSBlowfish.pyi	270	0644	edit dl rm
_mode_cbc.py	10971	0644	edit dl rm
_mode_cbc.pyi	691	0644	edit dl rm
_mode_ccm.py	24476	0644	edit dl rm
_mode_ccm.pyi	1600	0644	edit dl rm
_mode_cfb.py	10821	0644	edit dl rm
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_mode_ctr.py	15920	0644	edit dl rm
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_mode_eax.py	14543	0644	edit dl rm
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_mode_ecb.pyi	596	0644	edit dl rm
_mode_gcm.py	21402	0644	edit dl rm
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_mode_ofb.pyi	695	0644	edit dl rm
_mode_openpgp.py	7061	0644	edit dl rm
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_mode_siv.py	14094	0644	edit dl rm
_mode_siv.pyi	1261	0644	edit dl rm
_raw_aes.cpython-39-x86_64-linux-gnu.so	26816	0755	edit dl rm
_raw_aesni.cpython-39-x86_64-linux-gnu.so	11648	0755	edit dl rm
_raw_arc2.cpython-39-x86_64-linux-gnu.so	10528	0755	edit dl rm
_raw_blowfish.cpython-39-x86_64-linux-gnu.so	13568	0755	edit dl rm
_raw_cast.cpython-39-x86_64-linux-gnu.so	19864	0755	edit dl rm
_raw_cbc.cpython-39-x86_64-linux-gnu.so	8672	0755	edit dl rm
_raw_cfb.cpython-39-x86_64-linux-gnu.so	8928	0755	edit dl rm
_raw_ctr.cpython-39-x86_64-linux-gnu.so	9200	0755	edit dl rm
_raw_des.cpython-39-x86_64-linux-gnu.so	45120	0755	edit dl rm
_raw_des3.cpython-39-x86_64-linux-gnu.so	45408	0755	edit dl rm
_raw_ecb.cpython-39-x86_64-linux-gnu.so	6528	0755	edit dl rm
_raw_eksblowfish.cpython-39-x86_64-linux-gnu.so	18888	0755	edit dl rm
_raw_ocb.cpython-39-x86_64-linux-gnu.so	11456	0755	edit dl rm
_raw_ofb.cpython-39-x86_64-linux-gnu.so	7496	0755	edit dl rm
_Salsa20.cpython-39-x86_64-linux-gnu.so	8824	0755	edit dl rm
__init__.py	2888	0644	edit dl rm
__init__.pyi	0	0644	edit dl rm

Edit: /opt/imh-python/lib/python3.9/site-packages/Cryptodome/Cipher/ChaCha20_Poly1305.py (11561B)

# ===================================================================
#
# Copyright (c) 2018, Helder Eijs <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.
# ===================================================================

from binascii import unhexlify

from Cryptodome.Cipher import ChaCha20
from Cryptodome.Cipher.ChaCha20 import _HChaCha20
from Cryptodome.Hash import Poly1305, BLAKE2s

from Cryptodome.Random import get_random_bytes

from Cryptodome.Util.number import long_to_bytes
from Cryptodome.Util.py3compat import _copy_bytes, bord
from Cryptodome.Util._raw_api import is_buffer

def _enum(**enums):
    return type('Enum', (), enums)

_CipherStatus = _enum(PROCESSING_AUTH_DATA=1,
                      PROCESSING_CIPHERTEXT=2,
                      PROCESSING_DONE=3)

class ChaCha20Poly1305Cipher(object):
    """ChaCha20-Poly1305 and XChaCha20-Poly1305 cipher object.
    Do not create it directly. Use :py:func:`new` instead.

:var nonce: The nonce with length 8, 12 or 24 bytes
    :vartype nonce: byte string
    """

def __init__(self, key, nonce):
        """Initialize a ChaCha20-Poly1305 AEAD cipher object

See also `new()` at the module level."""

self.nonce = _copy_bytes(None, None, nonce)

self._next = (self.update, self.encrypt, self.decrypt, self.digest,
                      self.verify)

self._authenticator = Poly1305.new(key=key, nonce=nonce, cipher=ChaCha20)

self._cipher = ChaCha20.new(key=key, nonce=nonce)
        self._cipher.seek(64)   # Block counter starts at 1

self._len_aad = 0
        self._len_ct = 0
        self._mac_tag = None
        self._status = _CipherStatus.PROCESSING_AUTH_DATA

def update(self, data):
        """Protect the associated data.

Associated data (also known as *additional authenticated data* - AAD)
        is the piece of the message that must stay in the clear, while
        still allowing the receiver to verify its integrity.
        An example is packet headers.

The associated data (possibly split into multiple segments) is
        fed into :meth:`update` before any call to :meth:`decrypt` or :meth:`encrypt`.
        If there is no associated data, :meth:`update` is not called.

:param bytes/bytearray/memoryview assoc_data:
            A piece of associated data. There are no restrictions on its size.
        """

if self.update not in self._next:
            raise TypeError("update() method cannot be called")

self._len_aad += len(data)
        self._authenticator.update(data)

def _pad_aad(self):

assert(self._status == _CipherStatus.PROCESSING_AUTH_DATA)
        if self._len_aad & 0x0F:
            self._authenticator.update(b'\x00' * (16 - (self._len_aad & 0x0F)))
        self._status = _CipherStatus.PROCESSING_CIPHERTEXT

def encrypt(self, plaintext, output=None):
        """Encrypt a piece of data.

Args:
          plaintext(bytes/bytearray/memoryview): The data to encrypt, of any size.
        Keyword Args:
          output(bytes/bytearray/memoryview): The location where the ciphertext
            is written to. If ``None``, the ciphertext is returned.
        Returns:
          If ``output`` is ``None``, the ciphertext is returned as ``bytes``.
          Otherwise, ``None``.
        """

if self.encrypt not in self._next:
            raise TypeError("encrypt() method cannot be called")

if self._status == _CipherStatus.PROCESSING_AUTH_DATA:
            self._pad_aad()

self._next = (self.encrypt, self.digest)

result = self._cipher.encrypt(plaintext, output=output)
        self._len_ct += len(plaintext)
        if output is None:
            self._authenticator.update(result)
        else:
            self._authenticator.update(output)
        return result

def decrypt(self, ciphertext, output=None):
        """Decrypt a piece of data.

Args:
          ciphertext(bytes/bytearray/memoryview): The data to decrypt, of any size.
        Keyword Args:
          output(bytes/bytearray/memoryview): The location where the plaintext
            is written to. If ``None``, the plaintext is returned.
        Returns:
          If ``output`` is ``None``, the plaintext is returned as ``bytes``.
          Otherwise, ``None``.
        """

if self.decrypt not in self._next:
            raise TypeError("decrypt() method cannot be called")

if self._status == _CipherStatus.PROCESSING_AUTH_DATA:
            self._pad_aad()

self._next = (self.decrypt, self.verify)

self._len_ct += len(ciphertext)
        self._authenticator.update(ciphertext)
        return self._cipher.decrypt(ciphertext, output=output)

def _compute_mac(self):
        """Finalize the cipher (if not done already) and return the MAC."""

if self._mac_tag:
            assert(self._status == _CipherStatus.PROCESSING_DONE)
            return self._mac_tag

assert(self._status != _CipherStatus.PROCESSING_DONE)

if self._status == _CipherStatus.PROCESSING_AUTH_DATA:
            self._pad_aad()

if self._len_ct & 0x0F:
            self._authenticator.update(b'\x00' * (16 - (self._len_ct & 0x0F)))

self._status = _CipherStatus.PROCESSING_DONE

self._authenticator.update(long_to_bytes(self._len_aad, 8)[::-1])
        self._authenticator.update(long_to_bytes(self._len_ct, 8)[::-1])
        self._mac_tag = self._authenticator.digest()
        return self._mac_tag

def digest(self):
        """Compute the *binary* authentication tag (MAC).

:Return: the MAC tag, as 16 ``bytes``.
        """

if self.digest not in self._next:
            raise TypeError("digest() method cannot be called")
        self._next = (self.digest,)

return self._compute_mac()

def hexdigest(self):
        """Compute the *printable* authentication tag (MAC).

This method is like :meth:`digest`.

:Return: the MAC tag, as a hexadecimal string.
        """
        return "".join(["%02x" % bord(x) for x in self.digest()])

def verify(self, received_mac_tag):
        """Validate the *binary* authentication tag (MAC).

The receiver invokes this method at the very end, to
        check if the associated data (if any) and the decrypted
        messages are valid.

:param bytes/bytearray/memoryview received_mac_tag:
            This is the 16-byte *binary* MAC, as received from the sender.
        :Raises ValueError:
            if the MAC does not match. The message has been tampered with
            or the key is incorrect.
        """

if self.verify not in self._next:
            raise TypeError("verify() cannot be called"
                            " when encrypting a message")
        self._next = (self.verify,)

secret = get_random_bytes(16)

self._compute_mac()

mac1 = BLAKE2s.new(digest_bits=160, key=secret,
                           data=self._mac_tag)
        mac2 = BLAKE2s.new(digest_bits=160, key=secret,
                           data=received_mac_tag)

if mac1.digest() != mac2.digest():
            raise ValueError("MAC check failed")

def hexverify(self, hex_mac_tag):
        """Validate the *printable* authentication tag (MAC).

This method is like :meth:`verify`.

:param string hex_mac_tag:
            This is the *printable* MAC.
        :Raises ValueError:
            if the MAC does not match. The message has been tampered with
            or the key is incorrect.
        """

self.verify(unhexlify(hex_mac_tag))

def encrypt_and_digest(self, plaintext):
        """Perform :meth:`encrypt` and :meth:`digest` in one step.

:param plaintext: The data to encrypt, of any size.
        :type plaintext: bytes/bytearray/memoryview
        :return: a tuple with two ``bytes`` objects:

- the ciphertext, of equal length as the plaintext
            - the 16-byte MAC tag
        """

return self.encrypt(plaintext), self.digest()

def decrypt_and_verify(self, ciphertext, received_mac_tag):
        """Perform :meth:`decrypt` and :meth:`verify` in one step.

:param ciphertext: The piece of data to decrypt.
        :type ciphertext: bytes/bytearray/memoryview
        :param bytes received_mac_tag:
            This is the 16-byte *binary* MAC, as received from the sender.
        :return: the decrypted data (as ``bytes``)
        :raises ValueError:
            if the MAC does not match. The message has been tampered with
            or the key is incorrect.
        """

plaintext = self.decrypt(ciphertext)
        self.verify(received_mac_tag)
        return plaintext

def new(**kwargs):
    """Create a new ChaCha20-Poly1305 or XChaCha20-Poly1305 AEAD cipher.

:keyword key: The secret key to use. It must be 32 bytes long.
    :type key: byte string

:keyword nonce:
        A value that must never be reused for any other encryption
        done with this key.

For ChaCha20-Poly1305, it must be 8 or 12 bytes long.

For XChaCha20-Poly1305, it must be 24 bytes long.

If not provided, 12 ``bytes`` will be generated randomly
        (you can find them back in the ``nonce`` attribute).
    :type nonce: bytes, bytearray, memoryview

:Return: a :class:`Cryptodome.Cipher.ChaCha20.ChaCha20Poly1305Cipher` object
    """

try:
        key = kwargs.pop("key")
    except KeyError as e:
        raise TypeError("Missing parameter %s" % e)

self._len_ct += len(plaintext)

if len(key) != 32:
        raise ValueError("Key must be 32 bytes long")

nonce = kwargs.pop("nonce", None)
    if nonce is None:
        nonce = get_random_bytes(12)

if len(nonce) in (8, 12):
        pass
    elif len(nonce) == 24:
        key = _HChaCha20(key, nonce[:16])
        nonce = b'\x00\x00\x00\x00' + nonce[16:]
    else:
        raise ValueError("Nonce must be 8, 12 or 24 bytes long")

if not is_buffer(nonce):
        raise TypeError("nonce must be bytes, bytearray or memoryview")

if kwargs:
        raise TypeError("Unknown parameters: " + str(kwargs))

return ChaCha20Poly1305Cipher(key, nonce)

# Size of a key (in bytes)
key_size = 32

cmd: