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|
;; erc-sasl.el -- handle SASL PLAIN authentication
;; Copyright (C) 2012 Joseph Gay
;; Author: Joseph Gay <[email protected]>
;; Keywords: comm
;; This file is NOT 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:
;; This file implements SASL PLAIN authentication
;; To activate:
;;
;; (require 'erc-sasl)
;;
;; (add-to-list 'erc-sasl-server-regexp-list "host\\.server\\.com")
;; e.g. irc\\.freenode\\.net, or .* for any host
;;
;; To disable:
;; (setq erc-sasl-use-sasl nil)
;;
;; NOTE: requires passing a password initially to (erc) and variants
;;; Code:
(eval-when-compile (require 'cl))
(defvar erc-sasl-use-sasl t
"Set to nil to disable SASL auth")
(defvar erc-sasl-server-regexp-list '()
"List of regexps matching server host names for which sasl
should be used")
(defun erc-sasl-use-sasl-p ()
"Used internally to decide whether SASL should be used in the
current session"
(and erc-sasl-use-sasl
(boundp 'erc-session-server)
(cl-loop for re in erc-sasl-server-regexp-list
thereis (integerp (string-match re erc-session-server)))))
(define-erc-response-handler (CAP)
"Client capability framework is used to request SASL auth, need
to wait for ACK to begin" nil
(let ((msg (erc-response.contents parsed)))
(when (string-match " *sasl" msg)
(erc-server-send "AUTHENTICATE PLAIN")
;; now wait for AUTHENTICATE +
)))
(define-erc-response-handler (AUTHENTICATE)
"Handling empty server response indicating ready to receive
authentication." nil
(if erc-session-password
(let ((msg (erc-response.contents parsed)))
(when (string= "+" msg)
;; plain auth
(erc-server-send
(format "AUTHENTICATE %s"
(base64-encode-string
(concat "\0" (erc-current-nick)
"\0" erc-session-password) t)))))
(progn
(erc-display-message
parsed 'error
(if erc-server-connected 'active proc)
"You must set a password in order to use SASL authentication.")
;; aborting SASL auth
(erc-server-send (erc-server-send "AUTHENTICATE *")))))
(define-erc-response-handler (903)
"Handling a successful SASL authentication." nil
(erc-server-send "CAP END"))
(provide 'erc-sasl)
;; ;;; erc-sasl.el ends here
;; ;; Local Variables:
;; ;; indent-tabs-mode: nil
;; ;; End:
|
