lisp/gnus/sieve-manage.el

   1 ;;; sieve-manage.el --- Implementation of the managesieve protocol in elisp
   2
   3 ;; Copyright (C) 2001-2013 Free Software Foundation, Inc.
   4
   5 ;; Author: Simon Josefsson <simon@josefsson.org>
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software: you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation, either version 3 of the License, or
  12 ;; (at your option) any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  21
  22 ;;; Commentary:
  23
  24 ;; This library provides an elisp API for the managesieve network
  25 ;; protocol.
  26 ;;
  27 ;; It uses the SASL library for authentication, which means it
  28 ;; supports DIGEST-MD5, CRAM-MD5, SCRAM-MD5, NTLM, PLAIN and LOGIN
  29 ;; methods.  STARTTLS is not well tested, but should be easy to get to
  30 ;; work if someone wants.
  31 ;;
  32 ;; The API should be fairly obvious for anyone familiar with the
  33 ;; managesieve protocol, interface functions include:
  34 ;;
  35 ;; `sieve-manage-open'
  36 ;; open connection to managesieve server, returning a buffer to be
  37 ;; used by all other API functions.
  38 ;;
  39 ;; `sieve-manage-opened'
  40 ;; check if a server is open or not
  41 ;;
  42 ;; `sieve-manage-close'
  43 ;; close a server connection.
  44 ;;
  45 ;; `sieve-manage-listscripts'
  46 ;; `sieve-manage-deletescript'
  47 ;; `sieve-manage-getscript'
  48 ;; performs managesieve protocol actions
  49 ;;
  50 ;; and that's it.  Example of a managesieve session in *scratch*:
  51 ;;
  52 ;; (with-current-buffer (sieve-manage-open "mail.example.com")
  53 ;;   (sieve-manage-authenticate)
  54 ;;   (sieve-manage-listscripts))
  55 ;;
  56 ;; => ((active . "main") "vacation")
  57 ;;
  58 ;; References:
  59 ;;
  60 ;; draft-martin-managesieve-02.txt,
  61 ;; "A Protocol for Remotely Managing Sieve Scripts",
  62 ;; by Tim Martin.
  63 ;;
  64 ;; Release history:
  65 ;;
  66 ;; 2001-10-31 Committed to Oort Gnus.
  67 ;; 2002-07-27 Added DELETESCRIPT.  Suggested by Ned Ludd.
  68 ;; 2002-08-03 Use SASL library.
  69
  70 ;;; Code:
  71
  72 ;; For Emacs <22.2 and XEmacs.
  73 (eval-and-compile
  74   (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
  75
  76 (if (locate-library "password-cache")
  77     (require 'password-cache)
  78   (require 'password))
  79
  80 (eval-when-compile
  81   (require 'cl)                         ; caddr
  82   (require 'sasl)
  83   (require 'starttls))
  84 (autoload 'sasl-find-mechanism "sasl")
  85 (autoload 'starttls-open-stream "starttls")
  86 (autoload 'auth-source-search "auth-source")
  87
  88 ;; User customizable variables:
  89
  90 (defgroup sieve-manage nil
  91   "Low-level Managesieve protocol issues."
  92   :group 'mail
  93   :prefix "sieve-")
  94
  95 (defcustom sieve-manage-log "*sieve-manage-log*"
  96   "Name of buffer for managesieve session trace."
  97   :type 'string
  98   :group 'sieve-manage)
  99
 100 (defcustom sieve-manage-server-eol "\r\n"
 101   "The EOL string sent from the server."
 102   :type 'string
 103   :group 'sieve-manage)
 104
 105 (defcustom sieve-manage-client-eol "\r\n"
 106   "The EOL string we send to the server."
 107   :type 'string
 108   :group 'sieve-manage)
 109
 110 (defcustom sieve-manage-streams '(network starttls shell)
 111   "Priority of streams to consider when opening connection to server."
 112   :group 'sieve-manage)
 113
 114 (defcustom sieve-manage-stream-alist
 115   '((network   sieve-manage-network-p          sieve-manage-network-open)
 116     (shell     sieve-manage-shell-p            sieve-manage-shell-open)
 117     (starttls  sieve-manage-starttls-p         sieve-manage-starttls-open))
 118   "Definition of network streams.
 119
 120 \(NAME CHECK OPEN)
 121
 122 NAME names the stream, CHECK is a function returning non-nil if the
 123 server support the stream and OPEN is a function for opening the
 124 stream."
 125   :group 'sieve-manage)
 126
 127 (defcustom sieve-manage-authenticators '(digest-md5
 128                                          cram-md5
 129                                          scram-md5
 130                                          ntlm
 131                                          plain
 132                                          login)
 133   "Priority of authenticators to consider when authenticating to server."
 134   :group 'sieve-manage)
 135
 136 (defcustom sieve-manage-authenticator-alist
 137   '((cram-md5   sieve-manage-cram-md5-p       sieve-manage-cram-md5-auth)
 138     (digest-md5 sieve-manage-digest-md5-p     sieve-manage-digest-md5-auth)
 139     (scram-md5  sieve-manage-scram-md5-p      sieve-manage-scram-md5-auth)
 140     (ntlm       sieve-manage-ntlm-p           sieve-manage-ntlm-auth)
 141     (plain      sieve-manage-plain-p          sieve-manage-plain-auth)
 142     (login      sieve-manage-login-p          sieve-manage-login-auth))
 143   "Definition of authenticators.
 144
 145 \(NAME CHECK AUTHENTICATE)
 146
 147 NAME names the authenticator.  CHECK is a function returning non-nil if
 148 the server support the authenticator and AUTHENTICATE is a function
 149 for doing the actual authentication."
 150   :group 'sieve-manage)
 151
 152 (defcustom sieve-manage-default-port 2000
 153   "Default port number or service name for managesieve protocol."
 154   :type 'integer
 155   :group 'sieve-manage)
 156
 157 (defcustom sieve-manage-default-stream 'network
 158   "Default stream type to use for `sieve-manage'.
 159 Must be a name of a stream in `sieve-manage-stream-alist'."
 160   :version "24.1"
 161   :type 'symbol
 162   :group 'sieve-manage)
 163
 164 ;; Internal variables:
 165
 166 (defconst sieve-manage-local-variables '(sieve-manage-server
 167                                          sieve-manage-port
 168                                          sieve-manage-auth
 169                                          sieve-manage-stream
 170                                          sieve-manage-process
 171                                          sieve-manage-client-eol
 172                                          sieve-manage-server-eol
 173                                          sieve-manage-capability))
 174 (defconst sieve-manage-coding-system-for-read 'binary)
 175 (defconst sieve-manage-coding-system-for-write 'binary)
 176 (defvar sieve-manage-stream nil)
 177 (defvar sieve-manage-auth nil)
 178 (defvar sieve-manage-server nil)
 179 (defvar sieve-manage-port nil)
 180 (defvar sieve-manage-state 'closed
 181   "Managesieve state.
 182 Valid states are `closed', `initial', `nonauth', and `auth'.")
 183 (defvar sieve-manage-process nil)
 184 (defvar sieve-manage-capability nil)
 185
 186 ;; Internal utility functions
 187
 188 (defmacro sieve-manage-disable-multibyte ()
 189   "Enable multibyte in the current buffer."
 190   (unless (featurep 'xemacs)
 191     '(set-buffer-multibyte nil)))
 192
 193 (defun sieve-manage-erase (&optional p buffer)
 194   (let ((buffer (or buffer (current-buffer))))
 195     (and sieve-manage-log
 196          (with-current-buffer (get-buffer-create sieve-manage-log)
 197            (sieve-manage-disable-multibyte)
 198            (buffer-disable-undo)
 199            (goto-char (point-max))
 200            (insert-buffer-substring buffer (with-current-buffer buffer
 201                                              (point-min))
 202                                     (or p (with-current-buffer buffer
 203                                             (point-max)))))))
 204   (delete-region (point-min) (or p (point-max))))
 205
 206 (defun sieve-manage-open-1 (buffer)
 207   (with-current-buffer buffer
 208     (sieve-manage-erase)
 209     (setq sieve-manage-state 'initial
 210           sieve-manage-process
 211           (condition-case ()
 212               (funcall (nth 2 (assq sieve-manage-stream
 213                                     sieve-manage-stream-alist))
 214                        "sieve" buffer sieve-manage-server sieve-manage-port)
 215             ((error quit) nil)))
 216     (when sieve-manage-process
 217       (while (and (eq sieve-manage-state 'initial)
 218                   (memq (process-status sieve-manage-process) '(open run)))
 219         (message "Waiting for response from %s..." sieve-manage-server)
 220         (accept-process-output sieve-manage-process 1))
 221       (message "Waiting for response from %s...done" sieve-manage-server)
 222       (and (memq (process-status sieve-manage-process) '(open run))
 223            sieve-manage-process))))
 224
 225 ;; Streams
 226
 227 (defun sieve-manage-network-p (buffer)
 228   t)
 229
 230 (defun sieve-manage-network-open (name buffer server port)
 231   (let* ((port (or port sieve-manage-default-port))
 232          (coding-system-for-read sieve-manage-coding-system-for-read)
 233          (coding-system-for-write sieve-manage-coding-system-for-write)
 234          (process (open-network-stream name buffer server port)))
 235     (when process
 236       (while (and (memq (process-status process) '(open run))
 237                   (set-buffer buffer) ;; XXX "blue moon" nntp.el bug
 238                   (goto-char (point-min))
 239                   (not (sieve-manage-parse-greeting-1)))
 240         (accept-process-output process 1)
 241         (sit-for 1))
 242       (sieve-manage-erase nil buffer)
 243       (when (memq (process-status process) '(open run))
 244         process))))
 245
 246 (defun sieve-manage-starttls-p (buffer)
 247   (condition-case ()
 248       (progn
 249         (require 'starttls)
 250         (call-process "starttls"))
 251     (error nil)))
 252
 253 (defun sieve-manage-starttls-open (name buffer server port)
 254   (let* ((port (or port sieve-manage-default-port))
 255          (coding-system-for-read sieve-manage-coding-system-for-read)
 256          (coding-system-for-write sieve-manage-coding-system-for-write)
 257          (process (starttls-open-stream name buffer server port))
 258          done)
 259     (when process
 260       (while (and (memq (process-status process) '(open run))
 261                   (set-buffer buffer) ;; XXX "blue moon" nntp.el bug
 262                   (goto-char (point-min))
 263                   (not (sieve-manage-parse-greeting-1)))
 264         (accept-process-output process 1)
 265         (sit-for 1))
 266       (sieve-manage-erase nil buffer)
 267       (sieve-manage-send "STARTTLS")
 268       (starttls-negotiate process))
 269     (when (memq (process-status process) '(open run))
 270       process)))
 271
 272 ;; Authenticators
 273 (defun sieve-sasl-auth (buffer mech)
 274   "Login to server using the SASL MECH method."
 275   (message "sieve: Authenticating using %s..." mech)
 276   (with-current-buffer buffer
 277     (let* ((auth-info (auth-source-search :host sieve-manage-server
 278                                           :port "sieve"
 279                                           :max 1
 280                                           :create t))
 281            (user-name (or (plist-get (nth 0 auth-info) :user) ""))
 282            (user-password (or (plist-get (nth 0 auth-info) :secret) ""))
 283            (user-password (if (functionp user-password)
 284                               (funcall user-password)
 285                             user-password))
 286            (client (sasl-make-client (sasl-find-mechanism (list mech))
 287                                      user-name "sieve" sieve-manage-server))
 288            (sasl-read-passphrase
 289             ;; We *need* to copy the password, because sasl will modify it
 290             ;; somehow.
 291             `(lambda (prompt) ,(copy-sequence user-password)))
 292            (step (sasl-next-step client nil))
 293            (tag (sieve-manage-send
 294                  (concat
 295                   "AUTHENTICATE \""
 296                   mech
 297                   "\""
 298                   (and (sasl-step-data step)
 299                        (concat
 300                         " \""
 301                         (base64-encode-string
 302                          (sasl-step-data step)
 303                          'no-line-break)
 304                         "\"")))))
 305            data rsp)
 306       (catch 'done
 307         (while t
 308           (setq rsp nil)
 309           (goto-char (point-min))
 310           (while (null (or (progn
 311                              (setq rsp (sieve-manage-is-string))
 312                              (if (not (and rsp (looking-at
 313                                                 sieve-manage-server-eol)))
 314                                  (setq rsp nil)
 315                                (goto-char (match-end 0))
 316                                rsp))
 317                            (setq rsp (sieve-manage-is-okno))))
 318             (accept-process-output sieve-manage-process 1)
 319             (goto-char (point-min)))
 320           (sieve-manage-erase)
 321           (when (sieve-manage-ok-p rsp)
 322             (when (and (cadr rsp)
 323                        (string-match "^SASL \"\\([^\"]+\\)\"" (cadr rsp)))
 324               (sasl-step-set-data
 325                step (base64-decode-string (match-string 1 (cadr rsp)))))
 326             (if (and (setq step (sasl-next-step client step))
 327                      (setq data (sasl-step-data step)))
 328                 ;; We got data for server but it's finished
 329                 (error "Server not ready for SASL data: %s" data)
 330               ;; The authentication process is finished.
 331               (throw 'done t)))
 332           (unless (stringp rsp)
 333             (error "Server aborted SASL authentication: %s" (caddr rsp)))
 334           (sasl-step-set-data step (base64-decode-string rsp))
 335           (setq step (sasl-next-step client step))
 336           (sieve-manage-send
 337            (if (sasl-step-data step)
 338                (concat "\""
 339                        (base64-encode-string (sasl-step-data step)
 340                                              'no-line-break)
 341                        "\"")
 342              ""))))
 343       (message "sieve: Login using %s...done" mech))))
 344
 345 (defun sieve-manage-cram-md5-p (buffer)
 346   (sieve-manage-capability "SASL" "CRAM-MD5" buffer))
 347
 348 (defun sieve-manage-cram-md5-auth (buffer)
 349   "Login to managesieve server using the CRAM-MD5 SASL method."
 350   (sieve-sasl-auth buffer "CRAM-MD5"))
 351
 352 (defun sieve-manage-digest-md5-p (buffer)
 353   (sieve-manage-capability "SASL" "DIGEST-MD5" buffer))
 354
 355 (defun sieve-manage-digest-md5-auth (buffer)
 356   "Login to managesieve server using the DIGEST-MD5 SASL method."
 357   (sieve-sasl-auth buffer "DIGEST-MD5"))
 358
 359 (defun sieve-manage-scram-md5-p (buffer)
 360   (sieve-manage-capability "SASL" "SCRAM-MD5" buffer))
 361
 362 (defun sieve-manage-scram-md5-auth (buffer)
 363   "Login to managesieve server using the SCRAM-MD5 SASL method."
 364   (sieve-sasl-auth buffer "SCRAM-MD5"))
 365
 366 (defun sieve-manage-ntlm-p (buffer)
 367   (sieve-manage-capability "SASL" "NTLM" buffer))
 368
 369 (defun sieve-manage-ntlm-auth (buffer)
 370   "Login to managesieve server using the NTLM SASL method."
 371   (sieve-sasl-auth buffer "NTLM"))
 372
 373 (defun sieve-manage-plain-p (buffer)
 374   (sieve-manage-capability "SASL" "PLAIN" buffer))
 375
 376 (defun sieve-manage-plain-auth (buffer)
 377   "Login to managesieve server using the PLAIN SASL method."
 378   (sieve-sasl-auth buffer "PLAIN"))
 379
 380 (defun sieve-manage-login-p (buffer)
 381   (sieve-manage-capability "SASL" "LOGIN" buffer))
 382
 383 (defun sieve-manage-login-auth (buffer)
 384   "Login to managesieve server using the LOGIN SASL method."
 385   (sieve-sasl-auth buffer "LOGIN"))
 386
 387 ;; Managesieve API
 388
 389 (defun sieve-manage-open (server &optional port stream auth buffer)
 390   "Open a network connection to a managesieve SERVER (string).
 391 Optional argument PORT is port number (integer) on remote server.
 392 Optional argument STREAM is any of `sieve-manage-streams' (a symbol).
 393 Optional argument AUTH indicates authenticator to use, see
 394 `sieve-manage-authenticators' for available authenticators.
 395 If nil, chooses the best stream the server is capable of.
 396 Optional argument BUFFER is buffer (buffer, or string naming buffer)
 397 to work in."
 398   (or port (setq port sieve-manage-default-port))
 399   (setq buffer (or buffer (format " *sieve* %s:%s" server port)))
 400   (with-current-buffer (get-buffer-create buffer)
 401     (mapc 'make-local-variable sieve-manage-local-variables)
 402     (sieve-manage-disable-multibyte)
 403     (buffer-disable-undo)
 404     (setq sieve-manage-server (or server sieve-manage-server))
 405     (setq sieve-manage-port port)
 406     (setq sieve-manage-stream (or stream sieve-manage-stream))
 407     (message "sieve: Connecting to %s..." sieve-manage-server)
 408     (if (let ((sieve-manage-stream
 409                (or sieve-manage-stream sieve-manage-default-stream)))
 410           (sieve-manage-open-1 buffer))
 411         ;; Choose stream.
 412         (let (stream-changed)
 413           (message "sieve: Connecting to %s...done" sieve-manage-server)
 414           (when (null sieve-manage-stream)
 415             (let ((streams sieve-manage-streams))
 416               (while (setq stream (pop streams))
 417                 (if (funcall (nth 1 (assq stream
 418                                           sieve-manage-stream-alist)) buffer)
 419                     (setq stream-changed
 420                           (not (eq (or sieve-manage-stream
 421                                        sieve-manage-default-stream)
 422                                    stream))
 423                           sieve-manage-stream stream
 424                           streams nil)))
 425               (unless sieve-manage-stream
 426                 (error "Couldn't figure out a stream for server"))))
 427           (when stream-changed
 428             (message "sieve: Reconnecting with stream `%s'..."
 429                      sieve-manage-stream)
 430             (sieve-manage-close buffer)
 431             (if (sieve-manage-open-1 buffer)
 432                 (message "sieve: Reconnecting with stream `%s'...done"
 433                          sieve-manage-stream)
 434               (message "sieve: Reconnecting with stream `%s'...failed"
 435                        sieve-manage-stream))
 436             (setq sieve-manage-capability nil))
 437           (if (sieve-manage-opened buffer)
 438               ;; Choose authenticator
 439               (when (and (null sieve-manage-auth)
 440                          (not (eq sieve-manage-state 'auth)))
 441                 (let ((auths sieve-manage-authenticators))
 442                   (while (setq auth (pop auths))
 443                     (if (funcall (nth 1 (assq
 444                                          auth
 445                                          sieve-manage-authenticator-alist))
 446                                  buffer)
 447                         (setq sieve-manage-auth auth
 448                               auths nil)))
 449                   (unless sieve-manage-auth
 450                     (error "Couldn't figure out authenticator for server"))))))
 451       (message "sieve: Connecting to %s...failed" sieve-manage-server))
 452     (when (sieve-manage-opened buffer)
 453       (sieve-manage-erase)
 454       buffer)))
 455
 456 (defun sieve-manage-authenticate (&optional buffer)
 457   "Authenticate on server in BUFFER.
 458 Return `sieve-manage-state' value."
 459   (with-current-buffer (or buffer (current-buffer))
 460     (if (eq sieve-manage-state 'nonauth)
 461         (when (funcall (nth 2 (assq sieve-manage-auth
 462                                     sieve-manage-authenticator-alist))
 463                        (current-buffer))
 464           (setq sieve-manage-state 'auth))
 465       sieve-manage-state)))
 466
 467 (defun sieve-manage-opened (&optional buffer)
 468   "Return non-nil if connection to managesieve server in BUFFER is open.
 469 If BUFFER is nil then the current buffer is used."
 470   (and (setq buffer (get-buffer (or buffer (current-buffer))))
 471        (buffer-live-p buffer)
 472        (with-current-buffer buffer
 473          (and sieve-manage-process
 474               (memq (process-status sieve-manage-process) '(open run))))))
 475
 476 (defun sieve-manage-close (&optional buffer)
 477   "Close connection to managesieve server in BUFFER.
 478 If BUFFER is nil, the current buffer is used."
 479   (with-current-buffer (or buffer (current-buffer))
 480     (when (sieve-manage-opened)
 481       (sieve-manage-send "LOGOUT")
 482       (sit-for 1))
 483     (when (and sieve-manage-process
 484                (memq (process-status sieve-manage-process) '(open run)))
 485       (delete-process sieve-manage-process))
 486     (setq sieve-manage-process nil)
 487     (sieve-manage-erase)
 488     t))
 489
 490 (defun sieve-manage-capability (&optional name value buffer)
 491   "Check if capability NAME of server BUFFER match VALUE.
 492 If it does, return the server value of NAME. If not returns nil.
 493 If VALUE is nil, do not check VALUE and return server value.
 494 If NAME is nil, return the full server list of capabilities."
 495   (with-current-buffer (or buffer (current-buffer))
 496     (if (null name)
 497         sieve-manage-capability
 498       (let ((server-value (cadr (assoc name sieve-manage-capability))))
 499         (when (or (null value)
 500                   (and server-value
 501                        (string-match value server-value)))
 502           server-value)))))
 503
 504 (defun sieve-manage-listscripts (&optional buffer)
 505   (with-current-buffer (or buffer (current-buffer))
 506     (sieve-manage-send "LISTSCRIPTS")
 507     (sieve-manage-parse-listscripts)))
 508
 509 (defun sieve-manage-havespace (name size &optional buffer)
 510   (with-current-buffer (or buffer (current-buffer))
 511     (sieve-manage-send (format "HAVESPACE \"%s\" %s" name size))
 512     (sieve-manage-parse-okno)))
 513
 514 (defun sieve-manage-putscript (name content &optional buffer)
 515   (with-current-buffer (or buffer (current-buffer))
 516     (sieve-manage-send (format "PUTSCRIPT \"%s\" {%d+}%s%s" name
 517                                ;; Here we assume that the coding-system will
 518                                ;; replace each char with a single byte.
 519                                ;; This is always the case if `content' is
 520                                ;; a unibyte string.
 521                                (length content)
 522                                sieve-manage-client-eol content))
 523     (sieve-manage-parse-okno)))
 524
 525 (defun sieve-manage-deletescript (name &optional buffer)
 526   (with-current-buffer (or buffer (current-buffer))
 527     (sieve-manage-send (format "DELETESCRIPT \"%s\"" name))
 528     (sieve-manage-parse-okno)))
 529
 530 (defun sieve-manage-getscript (name output-buffer &optional buffer)
 531   (with-current-buffer (or buffer (current-buffer))
 532     (sieve-manage-send (format "GETSCRIPT \"%s\"" name))
 533     (let ((script (sieve-manage-parse-string)))
 534       (sieve-manage-parse-crlf)
 535       (with-current-buffer output-buffer
 536         (insert script))
 537       (sieve-manage-parse-okno))))
 538
 539 (defun sieve-manage-setactive (name &optional buffer)
 540   (with-current-buffer (or buffer (current-buffer))
 541     (sieve-manage-send (format "SETACTIVE \"%s\"" name))
 542     (sieve-manage-parse-okno)))
 543
 544 ;; Protocol parsing routines
 545
 546 (defun sieve-manage-ok-p (rsp)
 547   (string= (downcase (or (car-safe rsp) "")) "ok"))
 548
 549 (defsubst sieve-manage-forward ()
 550   (or (eobp) (forward-char)))
 551
 552 (defun sieve-manage-is-okno ()
 553   (when (looking-at (concat
 554                      "^\\(OK\\|NO\\)\\( (\\([^)]+\\))\\)?\\( \\(.*\\)\\)?"
 555                      sieve-manage-server-eol))
 556     (let ((status (match-string 1))
 557           (resp-code (match-string 3))
 558           (response (match-string 5)))
 559       (when response
 560         (goto-char (match-beginning 5))
 561         (setq response (sieve-manage-is-string)))
 562       (list status resp-code response))))
 563
 564 (defun sieve-manage-parse-okno ()
 565   (let (rsp)
 566     (while (null rsp)
 567       (accept-process-output (get-buffer-process (current-buffer)) 1)
 568       (goto-char (point-min))
 569       (setq rsp (sieve-manage-is-okno)))
 570     (sieve-manage-erase)
 571     rsp))
 572
 573 (defun sieve-manage-parse-capability-1 ()
 574   "Accept a managesieve greeting."
 575   (let (str)
 576     (while (setq str (sieve-manage-is-string))
 577       (if (eq (char-after) ? )
 578           (progn
 579             (sieve-manage-forward)
 580             (push (list str (sieve-manage-is-string))
 581                   sieve-manage-capability))
 582         (push (list str) sieve-manage-capability))
 583       (forward-line)))
 584   (when (re-search-forward (concat "^OK.*" sieve-manage-server-eol) nil t)
 585     (setq sieve-manage-state 'nonauth)))
 586
 587 (defalias 'sieve-manage-parse-greeting-1 'sieve-manage-parse-capability-1)
 588
 589 (defun sieve-manage-is-string ()
 590   (cond ((looking-at "\"\\([^\"]+\\)\"")
 591          (prog1
 592              (match-string 1)
 593            (goto-char (match-end 0))))
 594         ((looking-at (concat "{\\([0-9]+\\+?\\)}" sieve-manage-server-eol))
 595          (let ((pos (match-end 0))
 596                (len (string-to-number (match-string 1))))
 597            (if (< (point-max) (+ pos len))
 598                nil
 599              (goto-char (+ pos len))
 600              (buffer-substring pos (+ pos len)))))))
 601
 602 (defun sieve-manage-parse-string ()
 603   (let (rsp)
 604     (while (null rsp)
 605       (accept-process-output (get-buffer-process (current-buffer)) 1)
 606       (goto-char (point-min))
 607       (setq rsp (sieve-manage-is-string)))
 608     (sieve-manage-erase (point))
 609     rsp))
 610
 611 (defun sieve-manage-parse-crlf ()
 612   (when (looking-at sieve-manage-server-eol)
 613     (sieve-manage-erase (match-end 0))))
 614
 615 (defun sieve-manage-parse-listscripts ()
 616   (let (tmp rsp data)
 617     (while (null rsp)
 618       (while (null (or (setq rsp (sieve-manage-is-okno))
 619                        (setq tmp (sieve-manage-is-string))))
 620         (accept-process-output (get-buffer-process (current-buffer)) 1)
 621         (goto-char (point-min)))
 622       (when tmp
 623         (while (not (looking-at (concat "\\( ACTIVE\\)?"
 624                                         sieve-manage-server-eol)))
 625           (accept-process-output (get-buffer-process (current-buffer)) 1)
 626           (goto-char (point-min)))
 627         (if (match-string 1)
 628             (push (cons 'active tmp) data)
 629           (push tmp data))
 630         (goto-char (match-end 0))
 631         (setq tmp nil)))
 632     (sieve-manage-erase)
 633     (if (sieve-manage-ok-p rsp)
 634         data
 635       rsp)))
 636
 637 (defun sieve-manage-send (cmdstr)
 638   (setq cmdstr (concat cmdstr sieve-manage-client-eol))
 639   (and sieve-manage-log
 640        (with-current-buffer (get-buffer-create sieve-manage-log)
 641          (sieve-manage-disable-multibyte)
 642          (buffer-disable-undo)
 643          (goto-char (point-max))
 644          (insert cmdstr)))
 645   (process-send-string sieve-manage-process cmdstr))
 646
 647 (provide 'sieve-manage)
 648
 649 ;; sieve-manage.el ends here