Add SHA-256/512 hash algorithm to crypt(3) (kern/124164)

[Robert Watson]

On Sun, 30 Jan 2011, Mark Murray wrote:

> Just as a first cut, I'm going to "FreeBSD-ify" the code, to get it up to 
> our style(9) standards. Apart from stylistic issues, we already have SHA256 
> and SHA512 in our libraries, and they don't have alignment issues, So I'll 
> use them instead. You've donated to code to "public domain"; any objection 
> if I make this a BSD 2-clause license with FreeBSD as the copyright holder? 
> Many places have weird problems with the concept of "public domain", and 
> 2-clause BSD is pretty darned close.

In general, we strongly discourage the use of pseudonymous copyright holders. 
Use the legal names of holders wherever possible.  Having as few copies of 
$hashalgorithm as possible also an excellent idea.

(Agreed that the public domain is problematic due to differing notions of 
public domain in different jurisdictions.  Our preferred reference license 
remains in /usr/share/examples/etc/bsd-style-copyright; it's ideal if patches 
come with that pre-attached by the author.)

Robert