Added Gnus pkg subtree

[packages] / xemacs-packages / gnus / lisp / sasl-cram.el

diff --git a/xemacs-packages/gnus/lisp/sasl-cram.el b/xemacs-packages/gnus/lisp/sasl-cram.el
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+;;; sasl-cram.el --- CRAM-MD5 module for the SASL client framework
+
+;; Copyright (C) 2000, 2007-2016 Free Software Foundation, Inc.
+
+;; Author: Daiki Ueno <ueno@unixuser.org>
+;;     Kenichi OKADA <okada@opaopa.org>
+;; Keywords: SASL, CRAM-MD5
+;; Package: sasl
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs 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 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs 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 GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+(require 'sasl)
+(require 'hmac-md5)
+
+(defconst sasl-cram-md5-steps
+  '(ignore                             ;no initial response
+    sasl-cram-md5-response))
+
+(defun sasl-cram-md5-response (client step)
+  (let ((passphrase
+        (sasl-read-passphrase
+         (format "CRAM-MD5 passphrase for %s: "
+                 (sasl-client-name client)))))
+    (unwind-protect
+       (concat (sasl-client-name client) " "
+               (encode-hex-string
+                (hmac-md5 (sasl-step-data step) passphrase)))
+      (fillarray passphrase 0))))
+
+(put 'sasl-cram 'sasl-mechanism
+     (sasl-make-mechanism "CRAM-MD5" sasl-cram-md5-steps))
+
+(provide 'sasl-cram)
+
+;;; sasl-cram.el ends here