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pysha3 0.3

SHA-3 (Keccak) for Python 2.6 - 3.4


SHA-3 wrapper (keccak) for Python. The package is a wrapper around the
optimized reference implementation from . Only
the optimizations for 32 and 64bit platforms are used. The optimized SSE and
ARM assembly variants are ignored for now.

The module is a standalone version of the SHA-3 implemention of Python 3.4
(currently under development). The code in sha3module.c has been modified to
be compatible with Python 2.6 to 3.4. Python 2.5 and earlier are not


pysha3 has been successfully tested on several platforms and architectures:

- Linux (GCC 4.3, GCC 4.6, clang 3.0) on X86, X86_64 and ARMv6
- Windows (VS 2008, VS 2010) on X86 and X86_64
- FreeBSD (clang) on X86 and X86_64
- HP-UX (HP C/aC++) on IA64
- Solaris 10 (Oracle Solaris Studio 12.3) on SPARC (big endian)
- AIX (XLC 12.1) on PowerPC (big endian)

Thank you very much to Trent Nelson for the Snakebite network.


The `sha3` module contains several constructors for hash objects with a
PEP 247 compatible interface. The module provides `sha3_228()`, `sha3_256()`,
`sha3_384()`, and `sha3_512()`.

The `sha3` module monkey patches the `hashlib` module . The monkey patch is
automatically activated with the first import of the `sha3` module. The
`hashlib` module of Python 3.4 will support the four SHA-3 algorithms
on all platforms. Therefore you shouldn't use the sha3 module directly
and rather go through the `hashlib` interface::

>>> import sys
>>> import hashlib
>>> if sys.version_info < (3, 4):
... import sha3
>>> s ="sha3_512")
>>> s = hashlib.sha3_512() # alternative
>>> s.digest_size
>>> s.update(b"data")
>>> s.hexdigest()

**Don't use SHA-3 for HMAC!** HMAC hasn't been specified for SHA-3 yet and no
test vectors are available, too.

Comments from sha3module header

The code is based on from 29 May 2012.

The reference implementation is altered in this points:
- C++ comments are converted to ANSI C comments.
- All functions and globals are declared static.
- The typedef for UINT64 is commented out.
- brg_endian.h is removed.
- KeccakF-1600-opt[32|64]-settings.h are commented out
- Some unused functions are commented out to silence compiler warnings.

In order to avoid name clashes with other software I have to declare all
Keccak functions and global data as static. The C code is directly
included into this file in order to access the static functions.

Keccak can be tuned with several paramenters. I try to explain all options
as far as I understand them. The reference implementation also contains
assembler code for ARM platforms (NEON instructions).


loop unrolling (24, 12, 8, 6, 4, 3, 2, 1)

lane complementing

64bit platforms

default settings of common options


Additional optimiation instructions (disabled by default):

use Stream SIMD extensions

limit to 64bit instructions, otherwise 128bit

`w/o UseOnlySIMD64`
requires compiler argument `-mssse3` or `-mtune=core2` or better

use 64bit MMX instructions

use AMD's eXtended Operations (128bit SSE extension)

When neither `UseSSE`, `UseMMX` nor `UseXOP` is configured, `ROL64`
(rotate left 64) is implemented as:


use shld (shift left) asm optimization

shift and xor

`UseBebigokimisa` can't be used in combination with `UseSSE`, `UseMMX` or
`UseXOP`. `UseOnlySIMD64` has no effect unless UseSSE is specified.

Tests have shown that `UseSSE` + `UseOnlySIMD64` is about three to four
times SLOWER than `UseBebigokimisa`. `UseSSE` and `UseMMX` are about two
times slower. (tested by CH and AP)

32bit platforms

default settings of common options




`3` [default]
unknown, no `UseBebigokimisa`, `Unrolling` must be 2

use two 64k lookup tables for (de)interleaving (disabled by default)


pysha3 0.3

*Release date: 14-Oct-2012*

- Fix 64bit big endian support

- Add workaround for alignment error on 64bit SPARC machine by using the opt32

- block_size now returns NotImplemented to prevent users from using pysha3
with the hmac module.

pysha3 0.2.2

*Release date: 07-Oct-2012*

- Re-add brg_endian.h to fix issue on Solaris (big endian platform)

pysha3 0.2.1

*Release date: 06-Oct-2012*

- Fix to include Makefile and

- Add test command with hack for inplace builds

- Enhance README.txt and fixed its markup

pysha3 0.2

*Release date: 06-Oct-2012*

- Change directory struct to use the same directory layout as Python 3.4.

- Remove C++ comments from Keccak sources for ANSI C compatibility.

- Declare all Keccak functions and globals as static to avoid name clashes.

- Remove alias sha3() for sha3_512().

- Add block_size attribute. Keccak has a internal sponge size of 1600 bits.

- Release GIL around SHA3_update() calls.

- Monkey patch the hashlib module to support, e.g. hashlib.sha3_512() and"sha3_512")

- Release GIL around SHA3_update() when the data exceeds a certain size.

- Fix build on platforms with an unsigned 64bit integer type (uint64_t). The
module falls back to 32bit implementation of Keccak with interleave tables.

pysha3 0.1

*Release date: 04-Oct-2012*

- first release

- based on  
File Type Py Version Uploaded on Size
pysha3-0.3-cp26-none-win32.whl (md5) Python Wheel 2.6 2014-03-18 19KB
pysha3-0.3-cp26-none-win_amd64.whl (md5) Python Wheel 2.6 2014-03-18 21KB
pysha3-0.3-cp27-none-win32.whl (md5) Python Wheel 2.7 2014-03-18 19KB
pysha3-0.3-cp27-none-win_amd64.whl (md5) Python Wheel 2.7 2014-03-18 52KB
pysha3-0.3-cp32-none-win32.whl (md5) Python Wheel 3.2 2014-03-18 19KB
pysha3-0.3-cp32-none-win_amd64.whl (md5) Python Wheel 3.2 2014-03-18 52KB
pysha3-0.3-cp33-none-win32.whl (md5) Python Wheel 3.3 2014-03-18 20KB
pysha3-0.3-cp33-none-win_amd64.whl (md5) Python Wheel 3.3 2014-03-18 51KB
pysha3-0.3-cp34-none-win32.whl (md5) Python Wheel 3.4 2014-03-18 20KB
pysha3-0.3-cp34-none-win_amd64.whl (md5) Python Wheel 3.4 2014-03-18 51KB
pysha3-0.3.tar.gz (md5, pgp) Source 2012-10-14 46KB (md5) MS Windows installer 2.6 2012-10-14 242KB (md5) MS Windows installer 2.7 2012-10-14 273KB (md5) MS Windows installer 3.2 2012-10-14 273KB (md5) MS Windows installer 3.3 2012-10-14 271KB (md5) MS Windows installer 3.4 2014-03-18 272KB
pysha3-0.3.win32-py2.6.exe (md5) MS Windows installer 2.6 2012-10-14 213KB
pysha3-0.3.win32-py2.7.exe (md5) MS Windows installer 2.7 2012-10-14 214KB
pysha3-0.3.win32-py3.2.exe (md5) MS Windows installer 3.2 2012-10-14 214KB
pysha3-0.3.win32-py3.3.exe (md5) MS Windows installer 3.3 2012-10-14 209KB
pysha3-0.3.win32-py3.4.exe (md5) MS Windows installer 3.4 2014-03-18 209KB (md5, pgp) Source 2012-10-14 59KB
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