;;; md5.el --- MD5 Message Digest Algorithm.

;; Copyright (C) 1999, 2001  Free Software Foundation, Inc.

;; Author: Shuhei KOBAYASHI <shuhei@aqua.ocn.ne.jp>
;; Keywords: MD5, RFC 1321

;; This file is part of FLIM (Faithful Library about Internet Message).

;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
;; published by the Free Software Foundation; either version 2, or
;; (at your option) any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program; see the file COPYING.  If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Commentary:

;; Test cases from RFC 1321.
;;
;; (md5 "")
;; => d41d8cd98f00b204e9800998ecf8427e
;;
;; (md5 "a")
;; => 0cc175b9c0f1b6a831c399e269772661
;;
;; (md5 "abc")
;; => 900150983cd24fb0d6963f7d28e17f72
;;
;; (md5 "message digest")
;; => f96b697d7cb7938d525a2f31aaf161d0
;;
;; (md5 "abcdefghijklmnopqrstuvwxyz")
;; => c3fcd3d76192e4007dfb496cca67e13b
;;
;; (md5 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789")
;; => d174ab98d277d9f5a5611c2c9f419d9f
;;
;; (md5 "12345678901234567890123456789012345678901234567890123456789012345678901234567890")
;; => 57edf4a22be3c955ac49da2e2107b67a

;;; Code:

(defvar md5-dl-module
  (cond
   ((and (fboundp 'md5)
	 (subrp (symbol-function 'md5)))
    nil)
   ((fboundp 'dynamic-link)
    ;; Should we take care of `dynamic-link-path'?
    (let ((path (expand-file-name "md5.so" exec-directory)))
      (if (file-exists-p path)
	  path
	nil)))
   (t
    nil)))

(cond
 ((and (fboundp 'md5)
       (subrp (symbol-function 'md5)))
  ;; do nothing.
  )
 ((and (stringp md5-dl-module)
       (file-exists-p md5-dl-module))
  (require 'md5-dl))
 (t
  (require 'md5-el)))

(provide 'md5)

;;; md5.el ends here