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FIPS pub 180-1: Secure Hash Algorithm (SHA-1) based on: http://csrc.nist.gov/fips/fip180-
1.txt implemented by Jun-ichiro itojun Itoh <itojun@itojun.org>
sha1.c : Implementation of the Secure Hash Algorithm
SHA: NIST's Secure Hash Algorithm
This version written November 2000 by David Ireland of DI Management Services Pty
Limited <code@di-mgt.com.au>
Adapted from code in the Python Cryptography Toolkit, version 1.0.0 by A.M. Kuchling 1995.
AM Kuchling's posting:-
Based on SHA code originally posted to sci.crypt by Peter Gutmann in message
<30ajo5$oe8@ccu2.auckland.ac.nz>.
The original specification of SHA was found to have a weakness by NSA/NIST.
This code implements the fixed version of SHA.
Here's the first paragraph of Peter Gutmann's posting:
The following is my SHA (FIPS 180) code updated to allow use of the “fixed” SHA, thanks to
Jim Gillogly and an anonymous contributor for the information on what's changed in the new
version.
The fix is a simple change which involves adding a single rotate in the initial expansion
function.
It is unknown whether this is an optimal solution to the problem which was discovered in the
SHA or whether it's simply a bandaid which fixes the problem with a minimum of effort (for
example the reengineering of a great many Capstone chips).
trsha2.c
$KAME: sha1.c,v 1.5 2000/11/08 06:13:08 itojun Exp $
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