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项目作者： kpdemetriou

项目描述 ：
Tested, performant SipHash bindings for Python 3 with support for double-output-size, half-word and variable-round variants.
高级语言： C
项目地址: git://github.com/kpdemetriou/siphash-cffi.git
创建时间： 2018-06-19T18:39:47Z
项目社区：https://github.com/kpdemetriou/siphash-cffi
开源协议：BSD 3-Clause "New" or "Revised" License
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SipHash CFFI

SipHash is a family of pseudorandom functions (i.e. keyed hash functions) optimized for speed on short messages, designed by Jean-Philippe Aumasson and Daniel J. Bernstein.

This package provides tested, performant Python 3 CFFI bindings to the SipHash 2-4 reference implementation by Jean-Philippe Aumasson (including support for double-output-size and half-word variants) along with extensions to support tweakable numbers of compression and finalization rounds.

Installation

You can install this package using pip or the included setup.py script:

  1. # Using pip
  2. pip install siphash-cffi
  4. # Using setup.py
  5. python setup.py install

Usage

  1. from siphash import *
  3. # Demonstration key and data
  4. key = b"\0" * 16
  5. data = b"\0" * 64
  7. # SipHash-2-4 working with 64-bit words and a 64-bit output length
  8. output = siphash_64(key, data)
  10. # SipHash-2-4 working with 64-bit words and a 128-bit output length
  11. output = siphash_128(key, data)
  13. # SipHash-2-4 working with 32-bit words and a 32-bit output length
  14. output = half_siphash_32(key, data)
  16. # SipHash-2-4 working with 32-bit words and a 64-bit output length
  17. output = half_siphash_64(key, data)
  19. # SipHash-4-8 working with 64-bit words and a 64-bit output length
  20. output = siphash_64(key, data, 4, 8)
  22. # SipHash-4-8 working with 64-bit words and a 128-bit output length
  23. output = siphash_128(key, data, 4, 8)
  25. # SipHash-4-8 working with 32-bit words and a 32-bit output length
  26. output = half_siphash_32(key, data, 4, 8)
  28. # SipHash-4-8 working with 32-bit words and a 64-bit output length
  29. output = half_siphash_64(key, data, 4, 8)

License

  1. BSD 3-Clause License
  3. Copyright (c) 2018, Phil Demetriou
  4. All rights reserved.
  6. Redistribution and use in source and binary forms, with or without
  7. modification, are permitted provided that the following conditions are met:
  9. * Redistributions of source code must retain the above copyright notice, this
  10.   list of conditions and the following disclaimer.
  12. * Redistributions in binary form must reproduce the above copyright notice,
  13.   this list of conditions and the following disclaimer in the documentation
  14.   and/or other materials provided with the distribution.
  16. * Neither the name of the copyright holder nor the names of its
  17.   contributors may be used to endorse or promote products derived from
  18.   this software without specific prior written permission.
  20. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21. AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22. IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  23. DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  24. FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25. DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  26. SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  27. CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  28. OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29. OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.