Whirlpool: Bindings for whirlpool hash reference implementation.

digest, hashlib, whirlpool, c-extension, python, python-whirlpool, unlicense, whirlpool-reference, wrapper
pip install Whirlpool==1.0.0



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The Whirlpool algorithm is designed by Vincent Rijmen and Paulo S.L.M. Barreto. It is a secure and modern digest function that has been recommended by the NESSIE project and adopted in the ISO/IEC 10118-3 international standard.

Digest functions, also known as hash functions, produce fixed-length output (a digest or hash) from a variable-length message. They are designed to be a one-way function.

This library is a Python wrapper around the Whirlpool C reference implementation. The Whirlpool reference implementations are public domain, as is this code.

The first version of the wrapper was written by James Cleveland with help from #python on irc.freenode.net.

Later on the wrapper was rewritten by Olaf Conradi to use the hashlib interface and he made the library compatible with Python 3.


This library is available on PyPI.

pip install whirlpool


This is the same interface as provided by the other digest algorithms in Python's hashlib.

import whirlpool

wp = whirlpool.new("My String")
hashed_string = wp.hexdigest()

wp.update("My Salt")
hashed_string = wp.hexdigest()

Starting with Python 3 text strings (as shown above) are stored as unicode. You need to specify the encoding of these strings before hashing.

wp = whirlpool.new(data.encoding('utf-8'))

Strings that are marked as binary do not need encoding.


The source code is available on GitHub.

git clone https://github.com/oohlaf/python-whirlpool.git
cd python-whirlpool

Install in development mode using:

python setup.py develop

Or install in editable mode using pip:

pip install -e .


This module is tested using Python 2.7, PyPy, and Python 3.3 and up.

You can run the test suite using

python setup.py test