Public domain SHA-1 in C

[Steve Reid <steve@edmweb.com>]

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I've written an implementation of SHA-1 in C. Public domain, so you can
hack it to your hearts content and/or use it however you want. You can
download it from
http://www.edmweb.com/steve/sha1.c

It's not hard to use. Allocate a SHA1_CTX, initialize it with SHA1Init()
run over the data with SHA1Update() and finally extract the result using
SHA1Final(). Or just compile the program as-is and use it to hash files. 

It's reasonably fast (the 80 core SHA operations look good) but I'm
certain that there's room for improvement. 

Tested under FreeBSD 2.1.0-RELEASE on an i486SX. The three test vectors
from FIPS PUB 180-1 hash correctly.


=====================================================================
| Steve Reid - SysAdmin & Pres, EDM Web (http://www.edmweb.com/)    |
| Email: steve@edmweb.com   Home Page: http://www.edmweb.com/steve/ |
| PGP (2048/9F317269) Fingerprint: 11C89D1CD67287E68C09EC52443F8830 |
|          -- Disclaimer: JMHO, YMMV, TANSTAAFL, IANAL. --          |
===================================================================:)

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