emacs/lisp/gnus/gssapi.el
Gnus developers a123622dc4 Merge changes made in Gnus trunk.
message.texi (Insertion Variables): Document message-cite-style.
nnimap.el (nnimap-open-connection-1): Allow `network-only', too.
gssapi.el: New file separated out from imap.el to provide a general Kerberos 5 connection facility for Emacs.
message.el (message-elide-ellipsis): Document the format spec ellipsis.
message.el (message-elide-region): Allow the ellipsis to say how many lines were removed.
gnus-win.el (gnus-configure-frame): Protect against trying to restore window configurations containing buffers that are now dead.
nnimap.el (nnimap-parse-flags): Remove all MODSEQ entries before parsing to avoid integer overflows.
 (nnimap-parse-flags): Simplify the last change.
 (nnimap-parse-flags): Store HIGHESTMODSEQ as a string, since it may be too large for 32-bit Emacsen.
gnus-art.el (gnus-article-treat-body-boundary): Fix boundary width on XEmacs, which was one character too wide.
gnus-sum.el (gnus-articles-to-read): Use gnus-large-newsgroup as default number of articles to display.
 (gnus-articles-to-read): Use pretty names for prompt.
gnus-int.el (gnus-open-server): Ditto.
gnus-start.el (gnus-activate-group): Give a backtrace if debug-on-quit is set and the user hits `C-g'.
 (gnus-read-active-file): Ditto.
gnus-group.el (gnus-group-read-ephemeral-group): Ditto.
2011-03-15 22:38:41 +00:00

105 lines
3.3 KiB
EmacsLisp

;;; gssapi.el --- GSSAPI/Kerberos 5 interface for Emacs
;; Copyright (C) 2011 Free Software Foundation, Inc.
;; Author: Simon Josefsson <simon@josefsson.org>
;; Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: network
;; 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:
;;; Code:
(require 'format-spec)
(defcustom gssapi-program (list
(concat "gsasl %s %p "
"--mechanism GSSAPI "
"--authentication-id %l")
"imtest -m gssapi -u %l -p %p %s")
"List of strings containing commands for GSSAPI (krb5) authentication.
%s is replaced with server hostname, %p with port to connect to, and
%l with the value of `imap-default-user'. The program should accept
IMAP commands on stdin and return responses to stdout. Each entry in
the list is tried until a successful connection is made."
:group 'network
:type '(repeat string))
(defun open-gssapi-stream (name buffer server port)
(let ((cmds gssapi-program)
cmd done)
(with-current-buffer buffer
(while (and (not done)
(setq cmd (pop cmds)))
(message "Opening GSSAPI connection with `%s'..." cmd)
(erase-buffer)
(let* ((coding-system-for-read 'binary)
(coding-system-for-write 'binary)
(process (start-process
name buffer shell-file-name shell-command-switch
(format-spec
cmd
(format-spec-make
?s server
?p (number-to-string port)
?l imap-default-user))))
response)
(when process
(while (and (memq (process-status process) '(open run))
(goto-char (point-min))
;; Athena IMTEST can output SSL verify errors
(or (while (looking-at "^verify error:num=")
(forward-line))
t)
(or (while (looking-at "^TLS connection established")
(forward-line))
t)
;; cyrus 1.6.x (13? < x <= 22) queries capabilities
(or (while (looking-at "^C:")
(forward-line))
t)
;; cyrus 1.6 imtest print "S: " before server greeting
(or (not (looking-at "S: "))
(forward-char 3)
t)
;; GNU SASL may print 'Trying ...' first.
(or (not (looking-at "Trying "))
(forward-line)
t)
(not (and (looking-at "\\* \\(OK\\|PREAUTH\\|BYE\\) ")
;; success in imtest 1.6:
(re-search-forward
(concat "^\\(\\(Authenticat.*\\)\\|\\("
"Client authentication "
"finished.*\\)\\)")
nil t)
(setq response (match-string 1)))))
(accept-process-output process 1)
(sit-for 1))
(erase-buffer)
(message "GSSAPI IMAP connection: %s" (or response "failed"))
(if (and response (let ((case-fold-search nil))
(not (string-match "failed" response))))
(setq done process)
(delete-process process)
nil))))
done)))
(provide 'gssapi)
;;; gssapi.el ends here