| # =================================================================== | |
| # | |
| # 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, | |
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| # POSSIBILITY OF SUCH DAMAGE. | |
| # =================================================================== | |
| from Cryptodome.Util._raw_api import c_size_t | |
| from Cryptodome.Hash.cSHAKE128 import cSHAKE_XOF | |
| def _new(data, custom, function): | |
| # Use Keccak[512] | |
| return cSHAKE_XOF(data, custom, 512, function) | |
| def new(data=None, custom=None): | |
| """Return a fresh instance of a cSHAKE256 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. | |
| custom (bytes): | |
| Optional. | |
| A customization bytestring (``S`` in SP 800-185). | |
| :Return: A :class:`cSHAKE_XOF` object | |
| """ | |
| # Use Keccak[512] | |
| return cSHAKE_XOF(data, custom, 512, b'') | |