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author | Miles Bader <miles@gnu.org> | 2004-09-04 13:13:48 +0000 |
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committer | Miles Bader <miles@gnu.org> | 2004-09-04 13:13:48 +0000 |
commit | 23f87bede063c31c164f97278caabdc5cf5e6980 (patch) | |
tree | 12913439eae89014aa2d810da4861f933d3348ec /lisp/gnus/sieve-manage.el | |
parent | 2a223f35db1bb47fb00f43191e7450b45bbd7fc4 (diff) | |
download | emacs-23f87bede063c31c164f97278caabdc5cf5e6980.tar.gz |
Revision: miles@gnu.org--gnu-2004/emacs--cvs-trunk--0--patch-523
Merge from emacs--gnus--5.10, gnus--rel--5.10
Patches applied:
* miles@gnu.org--gnu-2004/emacs--gnus--5.10--base-0
tag of miles@gnu.org--gnu-2004/emacs--cvs-trunk--0--patch-464
* miles@gnu.org--gnu-2004/emacs--gnus--5.10--patch-1
Import from CVS branch gnus-5_10-branch
* miles@gnu.org--gnu-2004/emacs--gnus--5.10--patch-2
Merge from lorentey@elte.hu--2004/emacs--multi-tty--0, emacs--cvs-trunk--0
* miles@gnu.org--gnu-2004/emacs--gnus--5.10--patch-3
Merge from gnus--rel--5.10
* miles@gnu.org--gnu-2004/emacs--gnus--5.10--patch-4
Merge from gnus--rel--5.10
* miles@gnu.org--gnu-2004/gnus--rel--5.10--patch-18
Update from CVS
* miles@gnu.org--gnu-2004/gnus--rel--5.10--patch-19
Remove autoconf-generated files from archive
* miles@gnu.org--gnu-2004/gnus--rel--5.10--patch-20
Update from CVS
Diffstat (limited to 'lisp/gnus/sieve-manage.el')
-rw-r--r-- | lisp/gnus/sieve-manage.el | 616 |
1 files changed, 616 insertions, 0 deletions
diff --git a/lisp/gnus/sieve-manage.el b/lisp/gnus/sieve-manage.el new file mode 100644 index 00000000000..5b7ef9a99fb --- /dev/null +++ b/lisp/gnus/sieve-manage.el @@ -0,0 +1,616 @@ +;;; sieve-manage.el --- Implementation of the managesive protocol in elisp +;; Copyright (C) 2001, 2003 Free Software Foundation, Inc. + +;; Author: Simon Josefsson <simon@josefsson.org> + +;; 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 2, 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; see the file COPYING. If not, write to the +;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, +;; Boston, MA 02111-1307, USA. + +;;; Commentary: + +;; This library provides an elisp API for the managesieve network +;; protocol. +;; +;; Currently only the CRAM-MD5 authentication mechanism is supported. +;; +;; The API should be fairly obvious for anyone familiar with the +;; managesieve protocol, interface functions include: +;; +;; `sieve-manage-open' +;; open connection to managesieve server, returning a buffer to be +;; used by all other API functions. +;; +;; `sieve-manage-opened' +;; check if a server is open or not +;; +;; `sieve-manage-close' +;; close a server connection. +;; +;; `sieve-manage-authenticate' +;; `sieve-manage-listscripts' +;; `sieve-manage-deletescript' +;; `sieve-manage-getscript' +;; performs managesieve protocol actions +;; +;; and that's it. Example of a managesieve session in *scratch*: +;; +;; (setq my-buf (sieve-manage-open "my.server.com")) +;; " *sieve* my.server.com:2000*" +;; +;; (sieve-manage-authenticate "myusername" "mypassword" my-buf) +;; 'auth +;; +;; (sieve-manage-listscripts my-buf) +;; ("vacation" "testscript" ("splitmail") "badscript") +;; +;; References: +;; +;; draft-martin-managesieve-02.txt, +;; "A Protocol for Remotely Managing Sieve Scripts", +;; by Tim Martin. +;; +;; Release history: +;; +;; 2001-10-31 Committed to Oort Gnus. +;; 2002-07-27 Added DELETESCRIPT. Suggested by Ned Ludd. + +;;; Code: + +(require 'rfc2104) +(or (fboundp 'md5) + (require 'md5)) +(eval-and-compile + (autoload 'starttls-open-stream "starttls") + (autoload 'starttls-negotiate "starttls")) + +;; User customizable variables: + +(defgroup sieve-manage nil + "Low-level Managesieve protocol issues." + :group 'mail + :prefix "sieve-") + +(defcustom sieve-manage-log "*sieve-manage-log*" + "Name of buffer for managesieve session trace." + :type 'string) + +(defcustom sieve-manage-default-user (user-login-name) + "Default username to use." + :type 'string) + +(defcustom sieve-manage-server-eol "\r\n" + "The EOL string sent from the server." + :type 'string) + +(defcustom sieve-manage-client-eol "\r\n" + "The EOL string we send to the server." + :type 'string) + +(defcustom sieve-manage-streams '(network starttls shell) + "Priority of streams to consider when opening connection to server.") + +(defcustom sieve-manage-stream-alist + '((network sieve-manage-network-p sieve-manage-network-open) + (shell sieve-manage-shell-p sieve-manage-shell-open) + (starttls sieve-manage-starttls-p sieve-manage-starttls-open)) + "Definition of network streams. + +\(NAME CHECK OPEN) + +NAME names the stream, CHECK is a function returning non-nil if the +server support the stream and OPEN is a function for opening the +stream.") + +(defcustom sieve-manage-authenticators '(cram-md5 plain) + "Priority of authenticators to consider when authenticating to server.") + +(defcustom sieve-manage-authenticator-alist + '((cram-md5 sieve-manage-cram-md5-p sieve-manage-cram-md5-auth) + (plain sieve-manage-plain-p sieve-manage-plain-auth)) + "Definition of authenticators. + +\(NAME CHECK AUTHENTICATE) + +NAME names the authenticator. CHECK is a function returning non-nil if +the server support the authenticator and AUTHENTICATE is a function +for doing the actual authentication.") + +(defcustom sieve-manage-default-port 2000 + "Default port number for managesieve protocol." + :type 'integer) + +;; Internal variables: + +(defconst sieve-manage-local-variables '(sieve-manage-server + sieve-manage-port + sieve-manage-auth + sieve-manage-stream + sieve-manage-username + sieve-manage-password + sieve-manage-process + sieve-manage-client-eol + sieve-manage-server-eol + sieve-manage-capability)) +(defconst sieve-manage-default-stream 'network) +(defconst sieve-manage-coding-system-for-read 'binary) +(defconst sieve-manage-coding-system-for-write 'binary) +(defvar sieve-manage-stream nil) +(defvar sieve-manage-auth nil) +(defvar sieve-manage-server nil) +(defvar sieve-manage-port nil) +(defvar sieve-manage-username nil) +(defvar sieve-manage-password nil) +(defvar sieve-manage-state 'closed + "Managesieve state. +Valid states are `closed', `initial', `nonauth', and `auth'.") +(defvar sieve-manage-process nil) +(defvar sieve-manage-capability nil) + +;; Internal utility functions + +(defsubst sieve-manage-disable-multibyte () + "Enable multibyte in the current buffer." + (when (fboundp 'set-buffer-multibyte) + (set-buffer-multibyte nil))) + +;; Uses the dynamically bound `reason' variable. +(defvar reason) +(defun sieve-manage-interactive-login (buffer loginfunc) + "Login to server in BUFFER. +LOGINFUNC is passed a username and a password, it should return t if +it where sucessful authenticating itself to the server, nil otherwise. +Returns t if login was successful, nil otherwise." + (with-current-buffer buffer + (make-variable-buffer-local 'sieve-manage-username) + (make-variable-buffer-local 'sieve-manage-password) + (let (user passwd ret reason) + ;; (condition-case () + (while (or (not user) (not passwd)) + (setq user (or sieve-manage-username + (read-from-minibuffer + (concat "Managesieve username for " + sieve-manage-server ": ") + (or user sieve-manage-default-user)))) + (setq passwd (or sieve-manage-password + (read-passwd + (concat "Managesieve password for " user "@" + sieve-manage-server ": ")))) + (when (and user passwd) + (if (funcall loginfunc user passwd) + (progn + (setq ret t + sieve-manage-username user) + (if (and (not sieve-manage-password) + (y-or-n-p "Store password for this session? ")) + (setq sieve-manage-password passwd))) + (if reason + (message "Login failed (reason given: %s)..." reason) + (message "Login failed...")) + (setq reason nil) + (setq passwd nil) + (sit-for 1)))) + ;; (quit (with-current-buffer buffer + ;; (setq user nil + ;; passwd nil))) + ;; (error (with-current-buffer buffer + ;; (setq user nil + ;; passwd nil)))) + ret))) + +(defun sieve-manage-erase (&optional p buffer) + (let ((buffer (or buffer (current-buffer)))) + (and sieve-manage-log + (with-current-buffer (get-buffer-create sieve-manage-log) + (sieve-manage-disable-multibyte) + (buffer-disable-undo) + (goto-char (point-max)) + (insert-buffer-substring buffer (with-current-buffer buffer + (point-min)) + (or p (with-current-buffer buffer + (point-max))))))) + (delete-region (point-min) (or p (point-max)))) + +(defun sieve-manage-open-1 (buffer) + (with-current-buffer buffer + (sieve-manage-erase) + (setq sieve-manage-state 'initial + sieve-manage-process + (condition-case () + (funcall (nth 2 (assq sieve-manage-stream + sieve-manage-stream-alist)) + "sieve" buffer sieve-manage-server sieve-manage-port) + ((error quit) nil))) + (when sieve-manage-process + (while (and (eq sieve-manage-state 'initial) + (memq (process-status sieve-manage-process) '(open run))) + (message "Waiting for response from %s..." sieve-manage-server) + (accept-process-output sieve-manage-process 1)) + (message "Waiting for response from %s...done" sieve-manage-server) + (and (memq (process-status sieve-manage-process) '(open run)) + sieve-manage-process)))) + +;; Streams + +(defun sieve-manage-network-p (buffer) + t) + +(defun sieve-manage-network-open (name buffer server port) + (let* ((port (or port sieve-manage-default-port)) + (coding-system-for-read sieve-manage-coding-system-for-read) + (coding-system-for-write sieve-manage-coding-system-for-write) + (process (open-network-stream name buffer server port))) + (when process + (while (and (memq (process-status process) '(open run)) + (set-buffer buffer) ;; XXX "blue moon" nntp.el bug + (goto-char (point-min)) + (not (sieve-manage-parse-greeting-1))) + (accept-process-output process 1) + (sit-for 1)) + (sieve-manage-erase nil buffer) + (when (memq (process-status process) '(open run)) + process)))) + +(defun imap-starttls-p (buffer) + ;; (and (imap-capability 'STARTTLS buffer) + (condition-case () + (progn + (require 'starttls) + (call-process "starttls")) + (error nil))) + +(defun imap-starttls-open (name buffer server port) + (let* ((port (or port sieve-manage-default-port)) + (coding-system-for-read sieve-manage-coding-system-for-read) + (coding-system-for-write sieve-manage-coding-system-for-write) + (process (starttls-open-stream name buffer server port)) + done) + (when process + (while (and (memq (process-status process) '(open run)) + (set-buffer buffer) ;; XXX "blue moon" nntp.el bug + (goto-char (point-min)) + (not (sieve-manage-parse-greeting-1))) + (accept-process-output process 1) + (sit-for 1)) + (sieve-manage-erase nil buffer) + (sieve-manage-send "STARTTLS") + (starttls-negotiate process)) + (when (memq (process-status process) '(open run)) + process))) + +;; Authenticators + +(defun sieve-manage-plain-p (buffer) + (sieve-manage-capability "SASL" "PLAIN" buffer)) + +(defun sieve-manage-plain-auth (buffer) + "Login to managesieve server using the PLAIN SASL method." + (let* ((done (sieve-manage-interactive-login + buffer + (lambda (user passwd) + (sieve-manage-send (concat "AUTHENTICATE \"PLAIN\" \"" + (base64-encode-string + (concat (char-to-string 0) + user + (char-to-string 0) + passwd)) + "\"")) + (let ((rsp (sieve-manage-parse-okno))) + (if (sieve-manage-ok-p rsp) + t + (setq reason (cdr-safe rsp)) + nil)))))) + (if done + (message "sieve: Authenticating using PLAIN...done") + (message "sieve: Authenticating using PLAIN...failed")))) + +(defun sieve-manage-cram-md5-p (buffer) + (sieve-manage-capability "SASL" "CRAM-MD5" buffer)) + +(defun sieve-manage-cram-md5-auth (buffer) + "Login to managesieve server using the CRAM-MD5 SASL method." + (message "sieve: Authenticating using CRAM-MD5...") + (let* ((done (sieve-manage-interactive-login + buffer + (lambda (user passwd) + (sieve-manage-send "AUTHENTICATE \"CRAM-MD5\"") + (sieve-manage-send + (concat + "\"" + (base64-encode-string + (concat + user " " + (rfc2104-hash 'md5 64 16 passwd + (base64-decode-string + (prog1 + (sieve-manage-parse-string) + (sieve-manage-erase)))))) + "\"")) + (let ((rsp (sieve-manage-parse-okno))) + (if (sieve-manage-ok-p rsp) + t + (setq reason (cdr-safe rsp)) + nil)))))) + (if done + (message "sieve: Authenticating using CRAM-MD5...done") + (message "sieve: Authenticating using CRAM-MD5...failed")))) + +;; Managesieve API + +(defun sieve-manage-open (server &optional port stream auth buffer) + "Open a network connection to a managesieve SERVER (string). +Optional variable PORT is port number (integer) on remote server. +Optional variable STREAM is any of `sieve-manage-streams' (a symbol). +Optional variable AUTH indicates authenticator to use, see +`sieve-manage-authenticators' for available authenticators. If nil, chooses +the best stream the server is capable of. +Optional variable BUFFER is buffer (buffer, or string naming buffer) +to work in." + (setq buffer (or buffer (format " *sieve* %s:%d" server (or port 2000)))) + (with-current-buffer (get-buffer-create buffer) + (mapcar 'make-variable-buffer-local sieve-manage-local-variables) + (sieve-manage-disable-multibyte) + (buffer-disable-undo) + (setq sieve-manage-server (or server sieve-manage-server)) + (setq sieve-manage-port (or port sieve-manage-port)) + (setq sieve-manage-stream (or stream sieve-manage-stream)) + (message "sieve: Connecting to %s..." sieve-manage-server) + (if (let ((sieve-manage-stream + (or sieve-manage-stream sieve-manage-default-stream))) + (sieve-manage-open-1 buffer)) + ;; Choose stream. + (let (stream-changed) + (message "sieve: Connecting to %s...done" sieve-manage-server) + (when (null sieve-manage-stream) + (let ((streams sieve-manage-streams)) + (while (setq stream (pop streams)) + (if (funcall (nth 1 (assq stream + sieve-manage-stream-alist)) buffer) + (setq stream-changed + (not (eq (or sieve-manage-stream + sieve-manage-default-stream) + stream)) + sieve-manage-stream stream + streams nil))) + (unless sieve-manage-stream + (error "Couldn't figure out a stream for server")))) + (when stream-changed + (message "sieve: Reconnecting with stream `%s'..." + sieve-manage-stream) + (sieve-manage-close buffer) + (if (sieve-manage-open-1 buffer) + (message "sieve: Reconnecting with stream `%s'...done" + sieve-manage-stream) + (message "sieve: Reconnecting with stream `%s'...failed" + sieve-manage-stream)) + (setq sieve-manage-capability nil)) + (if (sieve-manage-opened buffer) + ;; Choose authenticator + (when (and (null sieve-manage-auth) + (not (eq sieve-manage-state 'auth))) + (let ((auths sieve-manage-authenticators)) + (while (setq auth (pop auths)) + (if (funcall (nth 1 (assq + auth + sieve-manage-authenticator-alist)) + buffer) + (setq sieve-manage-auth auth + auths nil))) + (unless sieve-manage-auth + (error "Couldn't figure out authenticator for server")))))) + (message "sieve: Connecting to %s...failed" sieve-manage-server)) + (when (sieve-manage-opened buffer) + (sieve-manage-erase) + buffer))) + +(defun sieve-manage-opened (&optional buffer) + "Return non-nil if connection to managesieve server in BUFFER is open. +If BUFFER is nil then the current buffer is used." + (and (setq buffer (get-buffer (or buffer (current-buffer)))) + (buffer-live-p buffer) + (with-current-buffer buffer + (and sieve-manage-process + (memq (process-status sieve-manage-process) '(open run)))))) + +(defun sieve-manage-close (&optional buffer) + "Close connection to managesieve server in BUFFER. +If BUFFER is nil, the current buffer is used." + (with-current-buffer (or buffer (current-buffer)) + (when (sieve-manage-opened) + (sieve-manage-send "LOGOUT") + (sit-for 1)) + (when (and sieve-manage-process + (memq (process-status sieve-manage-process) '(open run))) + (delete-process sieve-manage-process)) + (setq sieve-manage-process nil) + (sieve-manage-erase) + t)) + +(defun sieve-manage-authenticate (&optional user passwd buffer) + "Authenticate to server in BUFFER, using current buffer if nil. +It uses the authenticator specified when opening the server. If the +authenticator requires username/passwords, they are queried from the +user and optionally stored in the buffer. If USER and/or PASSWD is +specified, the user will not be questioned and the username and/or +password is remembered in the buffer." + (with-current-buffer (or buffer (current-buffer)) + (if (not (eq sieve-manage-state 'nonauth)) + (eq sieve-manage-state 'auth) + (make-variable-buffer-local 'sieve-manage-username) + (make-variable-buffer-local 'sieve-manage-password) + (if user (setq sieve-manage-username user)) + (if passwd (setq sieve-manage-password passwd)) + (if (funcall (nth 2 (assq sieve-manage-auth + sieve-manage-authenticator-alist)) buffer) + (setq sieve-manage-state 'auth))))) + +(defun sieve-manage-capability (&optional name value buffer) + (with-current-buffer (or buffer (current-buffer)) + (if (null name) + sieve-manage-capability + (if (null value) + (nth 1 (assoc name sieve-manage-capability)) + (when (string-match value (nth 1 (assoc name sieve-manage-capability))) + (nth 1 (assoc name sieve-manage-capability))))))) + +(defun sieve-manage-listscripts (&optional buffer) + (with-current-buffer (or buffer (current-buffer)) + (sieve-manage-send "LISTSCRIPTS") + (sieve-manage-parse-listscripts))) + +(defun sieve-manage-havespace (name size &optional buffer) + (with-current-buffer (or buffer (current-buffer)) + (sieve-manage-send (format "HAVESPACE \"%s\" %s" name size)) + (sieve-manage-parse-okno))) + +(eval-and-compile + (if (fboundp 'string-bytes) + (defalias 'sieve-string-bytes 'string-bytes) + (defalias 'sieve-string-bytes 'length))) + +(defun sieve-manage-putscript (name content &optional buffer) + (with-current-buffer (or buffer (current-buffer)) + (sieve-manage-send (format "PUTSCRIPT \"%s\" {%d+}%s%s" name + (sieve-string-bytes content) + sieve-manage-client-eol content)) + (sieve-manage-parse-okno))) + +(defun sieve-manage-deletescript (name &optional buffer) + (with-current-buffer (or buffer (current-buffer)) + (sieve-manage-send (format "DELETESCRIPT \"%s\"" name)) + (sieve-manage-parse-okno))) + +(defun sieve-manage-getscript (name output-buffer &optional buffer) + (with-current-buffer (or buffer (current-buffer)) + (sieve-manage-send (format "GETSCRIPT \"%s\"" name)) + (let ((script (sieve-manage-parse-string))) + (sieve-manage-parse-crlf) + (with-current-buffer output-buffer + (insert script)) + (sieve-manage-parse-okno)))) + +(defun sieve-manage-setactive (name &optional buffer) + (with-current-buffer (or buffer (current-buffer)) + (sieve-manage-send (format "SETACTIVE \"%s\"" name)) + (sieve-manage-parse-okno))) + +;; Protocol parsing routines + +(defun sieve-manage-ok-p (rsp) + (string= (downcase (or (car-safe rsp) "")) "ok")) + +(defsubst sieve-manage-forward () + (or (eobp) (forward-char))) + +(defun sieve-manage-is-okno () + (when (looking-at (concat + "^\\(OK\\|NO\\)\\( (\\([^)]+\\))\\)?\\( \\(.*\\)\\)?" + sieve-manage-server-eol)) + (let ((status (match-string 1)) + (resp-code (match-string 3)) + (response (match-string 5))) + (when response + (goto-char (match-beginning 5)) + (setq response (sieve-manage-is-string))) + (list status resp-code response)))) + +(defun sieve-manage-parse-okno () + (let (rsp) + (while (null rsp) + (accept-process-output (get-buffer-process (current-buffer)) 1) + (goto-char (point-min)) + (setq rsp (sieve-manage-is-okno))) + (sieve-manage-erase) + rsp)) + +(defun sieve-manage-parse-capability-1 () + "Accept a managesieve greeting." + (let (str) + (while (setq str (sieve-manage-is-string)) + (if (eq (char-after) ? ) + (progn + (sieve-manage-forward) + (push (list str (sieve-manage-is-string)) + sieve-manage-capability)) + (push (list str) sieve-manage-capability)) + (forward-line))) + (when (re-search-forward (concat "^OK" sieve-manage-server-eol) nil t) + (setq sieve-manage-state 'nonauth))) + +(defalias 'sieve-manage-parse-greeting-1 'sieve-manage-parse-capability-1) + +(defun sieve-manage-is-string () + (cond ((looking-at "\"\\([^\"]+\\)\"") + (prog1 + (match-string 1) + (goto-char (match-end 0)))) + ((looking-at (concat "{\\([0-9]+\\)}" sieve-manage-server-eol)) + (let ((pos (match-end 0)) + (len (string-to-number (match-string 1)))) + (if (< (point-max) (+ pos len)) + nil + (goto-char (+ pos len)) + (buffer-substring pos (+ pos len))))))) + +(defun sieve-manage-parse-string () + (let (rsp) + (while (null rsp) + (accept-process-output (get-buffer-process (current-buffer)) 1) + (goto-char (point-min)) + (setq rsp (sieve-manage-is-string))) + (sieve-manage-erase (point)) + rsp)) + +(defun sieve-manage-parse-crlf () + (when (looking-at sieve-manage-server-eol) + (sieve-manage-erase (match-end 0)))) + +(defun sieve-manage-parse-listscripts () + (let (tmp rsp data) + (while (null rsp) + (while (null (or (setq rsp (sieve-manage-is-okno)) + (setq tmp (sieve-manage-is-string)))) + (accept-process-output (get-buffer-process (current-buffer)) 1) + (goto-char (point-min))) + (when tmp + (while (not (looking-at (concat "\\( ACTIVE\\)?" + sieve-manage-server-eol))) + (accept-process-output (get-buffer-process (current-buffer)) 1) + (goto-char (point-min))) + (if (match-string 1) + (push (cons 'active tmp) data) + (push tmp data)) + (goto-char (match-end 0)) + (setq tmp nil))) + (sieve-manage-erase) + (if (sieve-manage-ok-p rsp) + data + rsp))) + +(defun sieve-manage-send (cmdstr) + (setq cmdstr (concat cmdstr sieve-manage-client-eol)) + (and sieve-manage-log + (with-current-buffer (get-buffer-create sieve-manage-log) + (sieve-manage-disable-multibyte) + (buffer-disable-undo) + (goto-char (point-max)) + (insert cmdstr))) + (process-send-string sieve-manage-process cmdstr)) + +(provide 'sieve-manage) + +;;; arch-tag: 321c4640-1371-4495-9baf-8ccb71dd5bd1 +;; sieve-manage.el ends here |