sriramk / nskein

nskein
Sriram Krishnan <mail@sriramkrishnan.com>

Managed implementation of Skein. The source is in the public domain - feel free to do whatever you want with it.
The code comes with no warranties whatsoever. You don't have to attribute usage but I wouldn't mind it :-)

Skein is an entry in the NIST SHA 3 contest from Bruce Schneier, Niels Ferguson et. al. Though there is a reference
implementation as part of their submission, I implemented mine based on a reading of their submission paper. It is
*not* optimised for speed. In fact, I'm sure it is downright slow as it is optimized for readability. In this sense,
it is loosely based on a Java version from http://www.xs4all.nl/~warper/.

Using it is simple. Use any of the types descended from SimpleSkeinManaged namely Skein512Managed, Skein256Managed and
Skein1024Managed. You can pass the output size you want or choose the default (which is typically blocksize/2).  Since
it implements System.Security.Cryptography.HashAlgorithm, you can use these types wherever .NET takes in a 
HashAlgorithm-
derived instance.

The nskeintest project contains tests which exercices the code against test data from the official submission. It is 
also
a good way to look at usage.

Sample usage
-----------
var skein256 = new Skein512Managed(256); //Skein 512-256
byte[] output = skein256.ComputeHash(someinputdata);