lisp/net/sasl-cram.el

   1 ;;; sasl-cram.el --- CRAM-MD5 module for the SASL client framework
   2
   3 ;; Copyright (C) 2000, 2007  Free Software Foundation, Inc.
   4
   5 ;; Author: Daiki Ueno <ueno@unixuser.org>
   6 ;;      Kenichi OKADA <okada@opaopa.org>
   7 ;; Keywords: SASL, CRAM-MD5
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 3, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  24 ;; Boston, MA 02110-1301, USA.
  25
  26 ;;; Commentary:
  27
  28 (require 'sasl)
  29 (require 'hmac-md5)
  30
  31 (defconst sasl-cram-md5-steps
  32   '(ignore                              ;no initial response
  33     sasl-cram-md5-response))
  34
  35 (defun sasl-cram-md5-response (client step)
  36   (let ((passphrase
  37          (sasl-read-passphrase
  38           (format "CRAM-MD5 passphrase for %s: "
  39                   (sasl-client-name client)))))
  40     (unwind-protect
  41         (concat (sasl-client-name client) " "
  42                 (encode-hex-string
  43                  (hmac-md5 (sasl-step-data step) passphrase)))
  44       (fillarray passphrase 0))))
  45
  46 (put 'sasl-cram 'sasl-mechanism
  47      (sasl-make-mechanism "CRAM-MD5" sasl-cram-md5-steps))
  48
  49 (provide 'sasl-cram)
  50
  51 ;;; arch-tag: 46cb281b-975a-4fe0-a39f-3018691b1b05
  52 ;;; sasl-cram.el ends here