See Source File
BSD style: see doc/license.txt for details
Copyright (c) 2006 Tango. All rights reserved
Initial release: Feb 2006
Regan Heath, Oskar Linde
This module implements the SHA-1 Algorithm described by Secure Hash Standard, FIPS PUB 180-1, and RFC 3174 US Secure Hash Algorithm 1 (SHA1). D. Eastlake 3rd, P. Jones. September 2001.