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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: SHAKE256.py

# ===================================================================
#
# Copyright (c) 2015, 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 Crypto.Util.py3compat import bord

from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
                                  VoidPointer, SmartPointer,
                                  create_string_buffer,
                                  get_raw_buffer, c_size_t,
                                  c_uint8_ptr, c_ubyte)

from Crypto.Hash.keccak import _raw_keccak_lib

class SHAKE256_XOF(object):
    """A SHAKE256 hash object.
    Do not instantiate directly.
    Use the :func:`new` function.

:ivar oid: ASN.1 Object ID
    :vartype oid: string
    """

# ASN.1 Object ID
    oid = "2.16.840.1.101.3.4.2.12"

def __init__(self, data=None):
        state = VoidPointer()
        result = _raw_keccak_lib.keccak_init(state.address_of(),
                                             c_size_t(64),
                                             c_ubyte(24))
        if result:
            raise ValueError("Error %d while instantiating SHAKE256"
                             % result)
        self._state = SmartPointer(state.get(),
                                   _raw_keccak_lib.keccak_destroy)
        self._is_squeezing = False
        self._padding = 0x1F

if data:
            self.update(data)

def update(self, data):
        """Continue hashing of a message by consuming the next chunk of data.

Args:
            data (byte string/byte array/memoryview): The next chunk of the message being hashed.
        """

if self._is_squeezing:
            raise TypeError("You cannot call 'update' after the first 'read'")

result = _raw_keccak_lib.keccak_absorb(self._state.get(),
                                               c_uint8_ptr(data),
                                               c_size_t(len(data)))
        if result:
            raise ValueError("Error %d while updating SHAKE256 state"
                             % result)
        return self

def read(self, length):
        """
        Compute the next piece of XOF output.

.. note::
            You cannot use :meth:`update` anymore after the first call to
            :meth:`read`.

Args:
            length (integer): the amount of bytes this method must return

:return: the next piece of XOF output (of the given length)
        :rtype: byte string
        """

self._is_squeezing = True
        bfr = create_string_buffer(length)
        result = _raw_keccak_lib.keccak_squeeze(self._state.get(),
                                                bfr,
                                                c_size_t(length),
                                                c_ubyte(self._padding))
        if result:
            raise ValueError("Error %d while extracting from SHAKE256"
                             % result)

return get_raw_buffer(bfr)

def new(self, data=None):
        return type(self)(data=data)

def new(data=None):
    """Return a fresh instance of a SHAKE256 object.

Args:
       data (bytes/bytearray/memoryview):
        The very first chunk of the message to hash.
        It is equivalent to an early call to :meth:`update`.
        Optional.

:Return: A :class:`SHAKE256_XOF` object
    """

return SHAKE256_XOF(data=data)

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Editing: SHAKE256.py

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