96 lines
2.9 KiB
EmacsLisp
96 lines
2.9 KiB
EmacsLisp
;; erc-sasl.el -- handle SASL PLAIN authentication
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;; Copyright (C) 2012-2022 Joseph Gay
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;; Author: Joseph Gay <ysph@psy.ai>
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;; Keywords: comm
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;; This file is NOT part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This file implements SASL PLAIN authentication
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;; To activate:
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;;
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;; (require 'erc-sasl)
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;;
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;; (add-to-list 'erc-sasl-server-regexp-list "host\\.server\\.com")
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;; e.g. irc\\.freenode\\.net, or .* for any host
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;;
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;; To disable:
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;; (setq erc-sasl-use-sasl nil)
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;;
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;; NOTE: requires passing a password initially to (erc) and variants
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;;; Code:
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(eval-when-compile (require 'cl-lib))
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(defvar erc-sasl-use-sasl t
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"Set to nil to disable SASL auth")
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(defvar erc-sasl-server-regexp-list '()
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"List of regexps matching server host names for which sasl
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should be used")
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(defun erc-sasl-use-sasl-p ()
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"Used internally to decide whether SASL should be used in the
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current session"
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(and erc-sasl-use-sasl
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(boundp 'erc-session-server)
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(cl-loop for re in erc-sasl-server-regexp-list
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thereis (integerp (string-match re erc-session-server)))))
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(define-erc-response-handler (CAP)
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"Client capability framework is used to request SASL auth, need
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to wait for ACK to begin" nil
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(let ((msg (erc-response.contents parsed)))
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(when (string-match " *sasl" msg)
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(erc-server-send "AUTHENTICATE PLAIN")
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;; now wait for AUTHENTICATE +
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)))
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(define-erc-response-handler (AUTHENTICATE)
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"Handling empty server response indicating ready to receive
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authentication." nil
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(if erc-session-password
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(let ((msg (erc-response.contents parsed)))
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(when (string= "+" msg)
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;; plain auth
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(erc-server-send
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(format "AUTHENTICATE %s"
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(base64-encode-string
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(concat "\0" (erc-current-nick)
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"\0" erc-session-password) t)))))
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(progn
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(erc-display-message
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parsed 'error
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(if erc-server-connected 'active proc)
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"You must set a password in order to use SASL authentication.")
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;; aborting SASL auth
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(erc-server-send (erc-server-send "AUTHENTICATE *")))))
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(define-erc-response-handler (903)
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"Handling a successful SASL authentication." nil
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(erc-server-send "CAP END"))
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(provide 'erc-sasl)
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;;; erc-sasl.el ends here
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;; Local Variables:
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;; indent-tabs-mode: nil
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;; End:
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