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📁 ..
📄 BLAKE2b.py(9.2 KB)
📄 BLAKE2b.pyi(906 B)
📄 BLAKE2s.py(9.21 KB)
📄 BLAKE2s.pyi(739 B)
📄 CMAC.py(10.11 KB)
📄 CMAC.pyi(822 B)
📄 HMAC.py(6.86 KB)
📄 HMAC.pyi(624 B)
📄 KMAC128.py(5.81 KB)
📄 KMAC128.pyi(903 B)
📄 KMAC256.py(2.84 KB)
📄 KMAC256.pyi(226 B)
📄 KangarooTwelve.py(8.82 KB)
📄 KangarooTwelve.pyi(572 B)
📄 MD2.py(5.97 KB)
📄 MD2.pyi(492 B)
📄 MD4.py(6.43 KB)
📄 MD4.pyi(532 B)
📄 MD5.py(6.46 KB)
📄 MD5.pyi(492 B)
📄 Poly1305.py(7.88 KB)
📄 Poly1305.pyi(665 B)
📄 RIPEMD.py(1.17 KB)
📄 RIPEMD.pyi(94 B)
📄 RIPEMD160.py(6.25 KB)
📄 RIPEMD160.pyi(516 B)
📄 SHA.py(1.12 KB)
📄 SHA.pyi(161 B)
📄 SHA1.py(6.53 KB)
📄 SHA1.pyi(536 B)
📄 SHA224.py(6.74 KB)
📄 SHA224.pyi(544 B)
📄 SHA256.py(6.74 KB)
📄 SHA256.pyi(612 B)
📄 SHA384.py(6.74 KB)
📄 SHA384.pyi(544 B)
📄 SHA3_224.py(6.03 KB)
📄 SHA3_224.pyi(605 B)
📄 SHA3_256.py(6.03 KB)
📄 SHA3_256.pyi(605 B)
📄 SHA3_384.py(6.13 KB)
📄 SHA3_384.pyi(605 B)
📄 SHA3_512.py(5.99 KB)
📄 SHA3_512.pyi(605 B)
📄 SHA512.py(7.54 KB)
📄 SHA512.pyi(622 B)
📄 SHAKE128.py(4.65 KB)
📄 SHAKE128.pyi(437 B)
📄 SHAKE256.py(4.65 KB)
📄 SHAKE256.pyi(437 B)
📄 TupleHash128.py(4.61 KB)
📄 TupleHash128.pyi(652 B)
📄 TupleHash256.py(2.84 KB)
📄 TupleHash256.pyi(144 B)
📄 _BLAKE2b.abi3.so(15.75 KB)
📄 _BLAKE2s.abi3.so(15.75 KB)
📄 _MD2.abi3.so(15.8 KB)
📄 _MD4.abi3.so(15.84 KB)
📄 _MD5.abi3.so(15.95 KB)
📄 _RIPEMD160.abi3.so(19.77 KB)
📄 _SHA1.abi3.so(19.95 KB)
📄 _SHA224.abi3.so(23.97 KB)
📄 _SHA256.abi3.so(23.97 KB)
📄 _SHA384.abi3.so(27.98 KB)
📄 _SHA512.abi3.so(28.01 KB)
📄 __init__.py(1.21 KB)
📄 __init__.pyi(0 B)
📁 __pycache__
📄 _ghash_clmul.abi3.so(15.58 KB)
📄 _ghash_portable.abi3.so(15.48 KB)
📄 _keccak.abi3.so(20.03 KB)
📄 _poly1305.abi3.so(15.94 KB)
📄 cSHAKE128.py(6.17 KB)
📄 cSHAKE128.pyi(499 B)
📄 cSHAKE256.py(2.15 KB)
📄 cSHAKE256.pyi(231 B)
📄 keccak.py(7.37 KB)
📄 keccak.pyi(741 B)

Editing: KMAC128.py

# ===================================================================
#
# Copyright (c) 2021, 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.
# ===================================================================

from binascii import unhexlify

from Crypto.Util.py3compat import bord, tobytes, is_bytes
from Crypto.Random import get_random_bytes

from . import cSHAKE128, SHA3_256
from .cSHAKE128 import _bytepad, _encode_str, _right_encode

class KMAC_Hash(object):
    """A KMAC hash object.
    Do not instantiate directly.
    Use the :func:`new` function.
    """

def __init__(self, data, key, mac_len, custom,
                 oid_variant, cshake, rate):

# See https://tools.ietf.org/html/rfc8702
        self.oid = "2.16.840.1.101.3.4.2." + oid_variant
        self.digest_size = mac_len

self._mac = None

partial_newX = _bytepad(_encode_str(tobytes(key)), rate)
        self._cshake = cshake._new(partial_newX, custom, b"KMAC")

if data:
            self._cshake.update(data)

def update(self, data):
        """Authenticate the next chunk of message.

Args:
            data (bytes/bytearray/memoryview): The next chunk of the message to
            authenticate.
        """

if self._mac:
            raise TypeError("You can only call 'digest' or 'hexdigest' on this object")

self._cshake.update(data)
        return self

def digest(self):
        """Return the **binary** (non-printable) MAC tag of the message.

:return: The MAC tag. Binary form.
        :rtype: byte string
        """

if not self._mac:
            self._cshake.update(_right_encode(self.digest_size * 8))
            self._mac = self._cshake.read(self.digest_size)

return self._mac

def hexdigest(self):
        """Return the **printable** MAC tag of the message.

:return: The MAC tag. Hexadecimal encoded.
        :rtype: string
        """

return "".join(["%02x" % bord(x) for x in tuple(self.digest())])

def verify(self, mac_tag):
        """Verify that a given **binary** MAC (computed by another party)
        is valid.

Args:
          mac_tag (bytes/bytearray/memoryview): the expected MAC of the message.

Raises:
            ValueError: if the MAC does not match. It means that the message
                has been tampered with or that the MAC key is incorrect.
        """

secret = get_random_bytes(16)

mac1 = SHA3_256.new(secret + mac_tag)
        mac2 = SHA3_256.new(secret + self.digest())

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

def hexverify(self, hex_mac_tag):
        """Verify that a given **printable** MAC (computed by another party)
        is valid.

Args:
            hex_mac_tag (string): the expected MAC of the message, as a hexadecimal string.

Raises:
            ValueError: if the MAC does not match. It means that the message
                has been tampered with or that the MAC key is incorrect.
        """

self.verify(unhexlify(tobytes(hex_mac_tag)))

def new(self, **kwargs):
        """Return a new instance of a KMAC hash object.
        See :func:`new`.
        """

if "mac_len" not in kwargs:
            kwargs["mac_len"] = self.digest_size

return new(**kwargs)

def new(**kwargs):
    """Create a new KMAC128 object.

Args:
        key (bytes/bytearray/memoryview):
            The key to use to compute the MAC.
            It must be at least 128 bits long (16 bytes).
        data (bytes/bytearray/memoryview):
            Optional. The very first chunk of the message to authenticate.
            It is equivalent to an early call to :meth:`KMAC_Hash.update`.
        mac_len (integer):
            Optional. The size of the authentication tag, in bytes.
            Default is 64. Minimum is 8.
        custom (bytes/bytearray/memoryview):
            Optional. A customization byte string (``S`` in SP 800-185).

Returns:
        A :class:`KMAC_Hash` hash object
    """

key = kwargs.pop("key", None)
    if not is_bytes(key):
        raise TypeError("You must pass a key to KMAC128")
    if len(key) < 16:
        raise ValueError("The key must be at least 128 bits long (16 bytes)")

data = kwargs.pop("data", None)

mac_len = kwargs.pop("mac_len", 64)
    if mac_len < 8:
        raise ValueError("'mac_len' must be 8 bytes or more")

custom = kwargs.pop("custom", b"")

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

return KMAC_Hash(data, key, mac_len, custom, "19", cSHAKE128, 168)

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