Re: Adding sha256 and sha512 to C?

[Paul Eggert <eggert@cs.ucla.edu>]

On 05/27/11 20:18, sand@blarg.net wrote:
> The gnulib crypto library also has sha256 and sha512
> functions; is there any objection to adding those as well?

Sounds good, but rather than continue to add crypto functions
wouldn't it be better to have a single function parameterized by the
algorithm name?  Something like the following signature:

 (crypto-hash-function ALGORITHM OBJECT
    &optional START END CODING-SYSTEM NOERROR BINARY)

Then, we could implement the existing functions this way:

(defun md5 (object &optional start end coding-system noerror)
   (crypto-hash-function 'md5 object start end coding-system noerror nil))

(define sha1 (object &optional start end binary)
   (crypto-hash-function 'sha1 object start end nil nil binary))