1 ;;; digest-md5.el --- Compute DIGEST-MD5.
3 ;; Copyright (C) 1999 Kenichi OKADA
5 ;; Author: Kenichi OKADA <okada@opaopa.org>
6 ;; Keywords: DIGEST-MD5, HMAC-MD5, SASL, IMAP, POP, ACAP
8 ;; This file is part of FLIM (Faithful Library about Internet Message).
10 ;; This program is free software; you can redistribute it and/or
11 ;; modify it under the terms of the GNU General Public License as
12 ;; published by the Free Software Foundation; either version 2, or
13 ;; (at your option) any later version.
15 ;; This program is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with this program; see the file COPYING. If not, write to
22 ;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
29 ;; This program is implemented from draft-leach-digest-sasl-05.txt.
31 ;; It is caller's responsibility to base64-decode challenges and
32 ;; base64-encode responses in IMAP4 AUTHENTICATE command.
34 ;; Passphrase should be longer than 16 bytes. (See RFC 2195)
38 ;; (digest-md5-digest-response "chris" "elwood.innosoft.com"
39 ;; "OA6MG9tEQGm2hh" "OA6MHXh6VqTrRk"
40 ;; "imap/elwood.innosoft.com"
41 ;; "d388dad90d4bbd760a152321f2143af7"
42 ;; 1 "auth" nil "utf-8")
43 ;; => "charset=utf-8,username=\"chris\",realm=\"elwood.innosoft.com\",nonce=\"OA6MG9tEQGm2hh\",nc=00000001,cnonce=\"OA6MHXh6VqTrRk\",digest-uri=\"imap/elwood.innosoft.com\",response=d388dad90d4bbd760a152321f2143af7,qop=auth"
51 (defun digest-md5-parse-digest-challenge (digest-challenge)
53 ;; (realm nonce qop-options stale maxbuf charset
54 ;; algorithm cipher-opts auth-param).
55 (let (realm nonce qop-options stale maxbuf charset
56 algorithm cipher-opts auth-param
59 (split-string digest-challenge ","))
60 (while (car challenges)
61 (if (null (string-match
62 "\\([a-z]+\\)=\"?\\(.+\\)\"?" (car challenges)))
63 (error "Parse error in digest-challenge1."))
65 (match-string 1 (car challenges))
66 (match-string 2 (car challenges))))
68 ((string= (car challenge) "realm")
69 (setq realm (cdr challenge)))
70 ((string= (car challenge) "nonce")
71 (setq nonce (cdr challenge)))
72 ((string= (car challenge) "qop")
73 (setq qop-options (cdr challenge)))
74 ((string= (car challenge) "stale")
75 (setq stale (cdr challenge)))
76 ((string= (car challenge) "maxbuf")
77 (setq maxbuf (cdr challenge)))
78 ((string= (car challenge) "charset")
79 (setq charset (cdr challenge)))
80 ((string= (car challenge) "algorithm")
81 (setq algorithm (cdr challenge)))
82 ((string= (car challenge) "cipher")
83 (setq cipher-opts (cdr challenge)))
85 (error "Parse error in digest-challenge.")))
86 (setq challenges (cdr challenges)))
87 (list realm nonce qop-options stale maxbuf charset
88 algorithm cipher-opts auth-param)))
90 (defun digest-md5-digest-uri (serv-type host &optional serv-name)
91 (concat serv-type "/" host
93 (null (string= host serv-name)))
94 (concat "/" serv-name))))
96 (defun digest-md5-cnonce ()
97 ;; It is RECOMMENDED that it
98 ;; contain at least 64 bits of entropy.
99 (concat (unique-id-m "") (unique-id-m "")))
101 (defun digest-md5-digest-response (username
104 &optional nonce-count qop
105 maxbuf charset cipher authzid)
108 (concat "charset=" charset ","))
109 "username=\"" username "\""
110 ",realm=\"" realm "\""
111 ",nonce=\"" nonce "\""
114 ",cnonce=\"" cnonce "\""
115 ",digest-uri=\"" digest-uri "\""
116 ",response=" response
118 (concat ",qop=" qop))
120 (concat ",maxbuf=" maxbuf))
122 (concat ",cipher=" cipher))
124 (concat ",authzid=\"" authzid "\""))))
127 (provide 'digest-md5)
129 ;;; digest-md5.el ends here