lisp/epa.el

   1 ;;; epa.el --- the EasyPG Assistant -*- lexical-binding: t -*-
   2
   3 ;; Copyright (C) 2006-2011  Free Software Foundation, Inc.
   4
   5 ;; Author: Daiki Ueno <ueno@unixuser.org>
   6 ;; Keywords: PGP, GnuPG
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Code:
  24
  25 (require 'epg)
  26 (require 'font-lock)
  27 (require 'widget)
  28 (eval-when-compile (require 'wid-edit))
  29 (require 'derived)
  30
  31 (defgroup epa nil
  32   "The EasyPG Assistant"
  33   :version "23.1"
  34   :group 'epg)
  35
  36 (defcustom epa-popup-info-window t
  37   "If non-nil, status information from epa commands is displayed on
  38 the separate window."
  39   :type 'boolean
  40   :group 'epa)
  41
  42 (defcustom epa-info-window-height 5
  43   "Number of lines used to display status information."
  44   :type 'integer
  45   :group 'epa)
  46
  47 (defgroup epa-faces nil
  48   "Faces for epa-mode."
  49   :version "23.1"
  50   :group 'epa)
  51
  52 (defface epa-validity-high
  53   `((((class color) (background dark))
  54      (:foreground "PaleTurquoise"
  55                   ,@(if (assq ':weight custom-face-attributes)
  56                         '(:weight bold)
  57                       '(:bold t))))
  58     (t
  59      (,@(if (assq ':weight custom-face-attributes)
  60             '(:weight bold)
  61           '(:bold t)))))
  62   "Face used for displaying the high validity."
  63   :group 'epa-faces)
  64
  65 (defface epa-validity-medium
  66   `((((class color) (background dark))
  67      (:foreground "PaleTurquoise"
  68                   ,@(if (assq ':slant custom-face-attributes)
  69                         '(:slant italic)
  70                       '(:italic t))))
  71     (t
  72      (,@(if (assq ':slant custom-face-attributes)
  73             '(:slant italic)
  74           '(:italic t)))))
  75   "Face used for displaying the medium validity."
  76   :group 'epa-faces)
  77
  78 (defface epa-validity-low
  79   `((t
  80      (,@(if (assq ':slant custom-face-attributes)
  81             '(:slant italic)
  82           '(:italic t)))))
  83   "Face used for displaying the low validity."
  84   :group 'epa-faces)
  85
  86 (defface epa-validity-disabled
  87   `((t
  88      (,@(if (assq ':slant custom-face-attributes)
  89             '(:slant italic)
  90           '(:italic t))
  91         :inverse-video t)))
  92   "Face used for displaying the disabled validity."
  93   :group 'epa-faces)
  94
  95 (defface epa-string
  96   '((((class color) (background dark))
  97      (:foreground "lightyellow"))
  98     (((class color) (background light))
  99      (:foreground "blue4")))
 100   "Face used for displaying the string."
 101   :group 'epa-faces)
 102
 103 (defface epa-mark
 104   `((((class color) (background dark))
 105      (:foreground "orange"
 106                   ,@(if (assq ':weight custom-face-attributes)
 107                         '(:weight bold)
 108                       '(:bold t))))
 109     (((class color) (background light))
 110      (:foreground "red"
 111                   ,@(if (assq ':weight custom-face-attributes)
 112                         '(:weight bold)
 113                       '(:bold t))))
 114     (t
 115      (,@(if (assq ':weight custom-face-attributes)
 116             '(:weight bold)
 117           '(:bold t)))))
 118   "Face used for displaying the high validity."
 119   :group 'epa-faces)
 120
 121 (defface epa-field-name
 122   `((((class color) (background dark))
 123      (:foreground "PaleTurquoise"
 124                   ,@(if (assq ':weight custom-face-attributes)
 125                         '(:weight bold)
 126                       '(:bold t))))
 127     (t
 128      (,@(if (assq ':weight custom-face-attributes)
 129             '(:weight bold)
 130           '(:bold t)))))
 131   "Face for the name of the attribute field."
 132   :group 'epa)
 133
 134 (defface epa-field-body
 135   `((((class color) (background dark))
 136      (:foreground "turquoise"
 137                   ,@(if (assq ':slant custom-face-attributes)
 138                         '(:slant italic)
 139                       '(:italic t))))
 140     (t
 141      (,@(if (assq ':slant custom-face-attributes)
 142             '(:slant italic)
 143           '(:italic t)))))
 144   "Face for the body of the attribute field."
 145   :group 'epa)
 146
 147 (defcustom epa-validity-face-alist
 148   '((unknown . epa-validity-disabled)
 149     (invalid . epa-validity-disabled)
 150     (disabled . epa-validity-disabled)
 151     (revoked . epa-validity-disabled)
 152     (expired . epa-validity-disabled)
 153     (none . epa-validity-low)
 154     (undefined . epa-validity-low)
 155     (never . epa-validity-low)
 156     (marginal . epa-validity-medium)
 157     (full . epa-validity-high)
 158     (ultimate . epa-validity-high))
 159   "An alist mapping validity values to faces."
 160   :type '(repeat (cons symbol face))
 161   :group 'epa)
 162
 163 (defvar epa-font-lock-keywords
 164   '(("^\\*"
 165      (0 'epa-mark))
 166     ("^\t\\([^\t:]+:\\)[ \t]*\\(.*\\)$"
 167      (1 'epa-field-name)
 168      (2 'epa-field-body)))
 169   "Default expressions to addon in epa-mode.")
 170
 171 (defconst epa-pubkey-algorithm-letter-alist
 172   '((1 . ?R)
 173     (2 . ?r)
 174     (3 . ?s)
 175     (16 . ?g)
 176     (17 . ?D)
 177     (20 . ?G)))
 178
 179 (defvar epa-protocol 'OpenPGP
 180   "*The default protocol.
 181 The value can be either OpenPGP or CMS.
 182
 183 You should bind this variable with `let', but do not set it globally.")
 184
 185 (defvar epa-armor nil
 186   "*If non-nil, epa commands create ASCII armored output.
 187
 188 You should bind this variable with `let', but do not set it globally.")
 189
 190 (defvar epa-textmode nil
 191   "*If non-nil, epa commands treat input files as text.
 192
 193 You should bind this variable with `let', but do not set it globally.")
 194
 195 (defvar epa-keys-buffer nil)
 196 (defvar epa-key-buffer-alist nil)
 197 (defvar epa-key nil)
 198 (defvar epa-list-keys-arguments nil)
 199 (defvar epa-info-buffer nil)
 200 (defvar epa-last-coding-system-specified nil)
 201
 202 (defvar epa-key-list-mode-map
 203   (let ((keymap (make-sparse-keymap))
 204         (menu-map (make-sparse-keymap)))
 205     (define-key keymap "m" 'epa-mark-key)
 206     (define-key keymap "u" 'epa-unmark-key)
 207     (define-key keymap "d" 'epa-decrypt-file)
 208     (define-key keymap "v" 'epa-verify-file)
 209     (define-key keymap "s" 'epa-sign-file)
 210     (define-key keymap "e" 'epa-encrypt-file)
 211     (define-key keymap "r" 'epa-delete-keys)
 212     (define-key keymap "i" 'epa-import-keys)
 213     (define-key keymap "o" 'epa-export-keys)
 214     (define-key keymap "g" 'revert-buffer)
 215     (define-key keymap "n" 'next-line)
 216     (define-key keymap "p" 'previous-line)
 217     (define-key keymap " " 'scroll-up)
 218     (define-key keymap [delete] 'scroll-down)
 219     (define-key keymap "q" 'epa-exit-buffer)
 220     (define-key keymap [menu-bar epa-key-list-mode] (cons "Keys" menu-map))
 221     (define-key menu-map [epa-key-list-unmark-key]
 222       '(menu-item "Unmark Key" epa-unmark-key
 223                   :help "Unmark a key"))
 224     (define-key menu-map [epa-key-list-mark-key]
 225       '(menu-item "Mark Key" epa-mark-key
 226                   :help "Mark a key"))
 227     (define-key menu-map [separator-epa-file] '(menu-item "--"))
 228     (define-key menu-map [epa-verify-file]
 229       '(menu-item "Verify File..." epa-verify-file
 230                   :help "Verify FILE"))
 231     (define-key menu-map [epa-sign-file]
 232       '(menu-item "Sign File..." epa-sign-file
 233                   :help "Sign FILE by SIGNERS keys selected"))
 234     (define-key menu-map [epa-decrypt-file]
 235       '(menu-item "Decrypt File..." epa-decrypt-file
 236                   :help "Decrypt FILE"))
 237     (define-key menu-map [epa-encrypt-file]
 238       '(menu-item "Encrypt File..." epa-encrypt-file
 239                   :help "Encrypt FILE for RECIPIENTS"))
 240     (define-key menu-map [separator-epa-key-list] '(menu-item "--"))
 241     (define-key menu-map [epa-key-list-delete-keys]
 242       '(menu-item "Delete keys" epa-delete-keys
 243                   :help "Delete Marked Keys"))
 244     (define-key menu-map [epa-key-list-import-keys]
 245       '(menu-item "Import Keys" epa-import-keys
 246                   :help "Import keys from a file"))
 247     (define-key menu-map [epa-key-list-export-keys]
 248       '(menu-item "Export Keys" epa-export-keys
 249                   :help "Export marked keys to a file"))
 250     keymap))
 251
 252 (defvar epa-key-mode-map
 253   (let ((keymap (make-sparse-keymap)))
 254     (define-key keymap "q" 'epa-exit-buffer)
 255     keymap))
 256
 257 (defvar epa-info-mode-map
 258   (let ((keymap (make-sparse-keymap)))
 259     (define-key keymap "q" 'delete-window)
 260     keymap))
 261
 262 (defvar epa-exit-buffer-function #'bury-buffer)
 263
 264 (define-widget 'epa-key 'push-button
 265   "Button for representing a epg-key object."
 266   :format "%[%v%]"
 267   :button-face-get 'epa--key-widget-button-face-get
 268   :value-create 'epa--key-widget-value-create
 269   :action 'epa--key-widget-action
 270   :help-echo 'epa--key-widget-help-echo)
 271
 272 (defun epa--key-widget-action (widget &optional _event)
 273   (save-selected-window
 274     (epa--show-key (widget-get widget :value))))
 275
 276 (defun epa--key-widget-value-create (widget)
 277   (let* ((key (widget-get widget :value))
 278          (primary-sub-key (car (epg-key-sub-key-list key)))
 279          (primary-user-id (car (epg-key-user-id-list key))))
 280     (insert (format "%c "
 281                     (if (epg-sub-key-validity primary-sub-key)
 282                         (car (rassq (epg-sub-key-validity primary-sub-key)
 283                                     epg-key-validity-alist))
 284                       ? ))
 285             (epg-sub-key-id primary-sub-key)
 286             " "
 287             (if primary-user-id
 288                 (if (stringp (epg-user-id-string primary-user-id))
 289                     (epg-user-id-string primary-user-id)
 290                   (epg-decode-dn (epg-user-id-string primary-user-id)))
 291               ""))))
 292
 293 (defun epa--key-widget-button-face-get (widget)
 294   (let ((validity (epg-sub-key-validity (car (epg-key-sub-key-list
 295                                               (widget-get widget :value))))))
 296     (if validity
 297         (cdr (assq validity epa-validity-face-alist))
 298       'default)))
 299
 300 (defun epa--key-widget-help-echo (widget)
 301   (format "Show %s"
 302           (epg-sub-key-id (car (epg-key-sub-key-list
 303                                 (widget-get widget :value))))))
 304
 305 (eval-and-compile
 306   (if (fboundp 'encode-coding-string)
 307       (defalias 'epa--encode-coding-string 'encode-coding-string)
 308     (defalias 'epa--encode-coding-string 'identity)))
 309
 310 (eval-and-compile
 311   (if (fboundp 'decode-coding-string)
 312       (defalias 'epa--decode-coding-string 'decode-coding-string)
 313     (defalias 'epa--decode-coding-string 'identity)))
 314
 315 (defun epa-key-list-mode ()
 316   "Major mode for `epa-list-keys'."
 317   (kill-all-local-variables)
 318   (buffer-disable-undo)
 319   (setq major-mode 'epa-key-list-mode
 320         mode-name "Keys"
 321         truncate-lines t
 322         buffer-read-only t)
 323   (use-local-map epa-key-list-mode-map)
 324   (make-local-variable 'font-lock-defaults)
 325   (setq font-lock-defaults '(epa-font-lock-keywords t))
 326   ;; In XEmacs, auto-initialization of font-lock is not effective
 327   ;; if buffer-file-name is not set.
 328   (font-lock-set-defaults)
 329   (make-local-variable 'epa-exit-buffer-function)
 330   (make-local-variable 'revert-buffer-function)
 331   (setq revert-buffer-function 'epa--key-list-revert-buffer)
 332   (run-mode-hooks 'epa-key-list-mode-hook))
 333
 334 (defun epa-key-mode ()
 335   "Major mode for a key description."
 336   (kill-all-local-variables)
 337   (buffer-disable-undo)
 338   (setq major-mode 'epa-key-mode
 339         mode-name "Key"
 340         truncate-lines t
 341         buffer-read-only t)
 342   (use-local-map epa-key-mode-map)
 343   (make-local-variable 'font-lock-defaults)
 344   (setq font-lock-defaults '(epa-font-lock-keywords t))
 345   ;; In XEmacs, auto-initialization of font-lock is not effective
 346   ;; if buffer-file-name is not set.
 347   (font-lock-set-defaults)
 348   (make-local-variable 'epa-exit-buffer-function)
 349   (run-mode-hooks 'epa-key-mode-hook))
 350
 351 (defun epa-info-mode ()
 352   "Major mode for `epa-info-buffer'."
 353   (kill-all-local-variables)
 354   (buffer-disable-undo)
 355   (setq major-mode 'epa-info-mode
 356         mode-name "Info"
 357         truncate-lines t
 358         buffer-read-only t)
 359   (use-local-map epa-info-mode-map)
 360   (run-mode-hooks 'epa-info-mode-hook))
 361
 362 (defun epa-mark-key (&optional arg)
 363   "Mark a key on the current line.
 364 If ARG is non-nil, unmark the key."
 365   (interactive "P")
 366   (let ((inhibit-read-only t)
 367         buffer-read-only
 368         properties)
 369     (beginning-of-line)
 370     (unless (get-text-property (point) 'epa-key)
 371       (error "No key on this line"))
 372     (setq properties (text-properties-at (point)))
 373     (delete-char 1)
 374     (insert (if arg " " "*"))
 375     (set-text-properties (1- (point)) (point) properties)
 376     (forward-line)))
 377
 378 (defun epa-unmark-key (&optional arg)
 379   "Unmark a key on the current line.
 380 If ARG is non-nil, mark the key."
 381   (interactive "P")
 382   (epa-mark-key (not arg)))
 383
 384 (defun epa-exit-buffer ()
 385   "Exit the current buffer.
 386 `epa-exit-buffer-function' is called if it is set."
 387   (interactive)
 388   (funcall epa-exit-buffer-function))
 389
 390 (defun epa--insert-keys (keys)
 391   (save-excursion
 392     (save-restriction
 393       (narrow-to-region (point) (point))
 394       (let (point)
 395         (while keys
 396           (setq point (point))
 397           (insert "  ")
 398           (add-text-properties point (point)
 399                                (list 'epa-key (car keys)
 400                                      'front-sticky nil
 401                                      'rear-nonsticky t
 402                                      'start-open t
 403                                      'end-open t))
 404           (widget-create 'epa-key :value (car keys))
 405           (insert "\n")
 406           (setq keys (cdr keys))))
 407       (add-text-properties (point-min) (point-max)
 408                            (list 'epa-list-keys t
 409                                  'front-sticky nil
 410                                  'rear-nonsticky t
 411                                  'start-open t
 412                                  'end-open t)))))
 413
 414 (defun epa--list-keys (name secret)
 415   (unless (and epa-keys-buffer
 416                (buffer-live-p epa-keys-buffer))
 417     (setq epa-keys-buffer (generate-new-buffer "*Keys*")))
 418   (set-buffer epa-keys-buffer)
 419   (epa-key-list-mode)
 420   (let ((inhibit-read-only t)
 421         buffer-read-only
 422         (point (point-min))
 423         (context (epg-make-context epa-protocol)))
 424     (unless (get-text-property point 'epa-list-keys)
 425       (setq point (next-single-property-change point 'epa-list-keys)))
 426     (when point
 427       (delete-region point
 428                      (or (next-single-property-change point 'epa-list-keys)
 429                          (point-max)))
 430       (goto-char point))
 431     (epa--insert-keys (epg-list-keys context name secret))
 432     (widget-setup)
 433     (set-keymap-parent (current-local-map) widget-keymap))
 434   (make-local-variable 'epa-list-keys-arguments)
 435   (setq epa-list-keys-arguments (list name secret))
 436   (goto-char (point-min))
 437   (pop-to-buffer (current-buffer)))
 438
 439 ;;;###autoload
 440 (defun epa-list-keys (&optional name)
 441   "List all keys matched with NAME from the public keyring."
 442   (interactive
 443    (if current-prefix-arg
 444        (let ((name (read-string "Pattern: "
 445                                 (if epa-list-keys-arguments
 446                                     (car epa-list-keys-arguments)))))
 447          (list (if (equal name "") nil name)))
 448      (list nil)))
 449   (epa--list-keys name nil))
 450
 451 ;;;###autoload
 452 (defun epa-list-secret-keys (&optional name)
 453   "List all keys matched with NAME from the private keyring."
 454   (interactive
 455    (if current-prefix-arg
 456        (let ((name (read-string "Pattern: "
 457                                 (if epa-list-keys-arguments
 458                                     (car epa-list-keys-arguments)))))
 459          (list (if (equal name "") nil name)))
 460      (list nil)))
 461   (epa--list-keys name t))
 462
 463 (defun epa--key-list-revert-buffer (&optional _ignore-auto _noconfirm)
 464   (apply #'epa--list-keys epa-list-keys-arguments))
 465
 466 (defun epa--marked-keys ()
 467   (or (with-current-buffer epa-keys-buffer
 468         (goto-char (point-min))
 469         (let (keys key)
 470           (while (re-search-forward "^\\*" nil t)
 471             (if (setq key (get-text-property (match-beginning 0)
 472                                              'epa-key))
 473                 (setq keys (cons key keys))))
 474           (nreverse keys)))
 475       (let ((key (get-text-property (point-at-bol) 'epa-key)))
 476         (if key
 477             (list key)))))
 478
 479 (defun epa--select-keys (prompt keys)
 480   (unless (and epa-keys-buffer
 481                (buffer-live-p epa-keys-buffer))
 482     (setq epa-keys-buffer (generate-new-buffer "*Keys*")))
 483   (with-current-buffer epa-keys-buffer
 484     (epa-key-list-mode)
 485     (let ((inhibit-read-only t)
 486           buffer-read-only)
 487       (erase-buffer)
 488       (insert prompt "\n"
 489               (substitute-command-keys "\
 490 - `\\[epa-mark-key]' to mark a key on the line
 491 - `\\[epa-unmark-key]' to unmark a key on the line\n"))
 492       (widget-create 'link
 493                      :notify (lambda (&rest _ignore) (abort-recursive-edit))
 494                      :help-echo
 495                      (substitute-command-keys
 496                       "Click here or \\[abort-recursive-edit] to cancel")
 497                      "Cancel")
 498       (widget-create 'link
 499                      :notify (lambda (&rest _ignore) (exit-recursive-edit))
 500                      :help-echo
 501                      (substitute-command-keys
 502                       "Click here or \\[exit-recursive-edit] to finish")
 503                      "OK")
 504       (insert "\n\n")
 505       (epa--insert-keys keys)
 506       (widget-setup)
 507       (set-keymap-parent (current-local-map) widget-keymap)
 508       (setq epa-exit-buffer-function #'abort-recursive-edit)
 509       (goto-char (point-min))
 510       (let ((display-buffer-mark-dedicated 'soft))
 511         (pop-to-buffer (current-buffer))))
 512     (unwind-protect
 513         (progn
 514           (recursive-edit)
 515           (epa--marked-keys))
 516       (kill-buffer epa-keys-buffer))))
 517
 518 ;;;###autoload
 519 (defun epa-select-keys (context prompt &optional names secret)
 520   "Display a user's keyring and ask him to select keys.
 521 CONTEXT is an epg-context.
 522 PROMPT is a string to prompt with.
 523 NAMES is a list of strings to be matched with keys.  If it is nil, all
 524 the keys are listed.
 525 If SECRET is non-nil, list secret keys instead of public keys."
 526   (let ((keys (epg-list-keys context names secret)))
 527     (epa--select-keys prompt keys)))
 528
 529 (defun epa--show-key (key)
 530   (let* ((primary-sub-key (car (epg-key-sub-key-list key)))
 531          (entry (assoc (epg-sub-key-id primary-sub-key)
 532                        epa-key-buffer-alist))
 533          (inhibit-read-only t)
 534          buffer-read-only
 535          pointer)
 536     (unless entry
 537       (setq entry (cons (epg-sub-key-id primary-sub-key) nil)
 538             epa-key-buffer-alist (cons entry epa-key-buffer-alist)))
 539     (unless (and (cdr entry)
 540                  (buffer-live-p (cdr entry)))
 541       (setcdr entry (generate-new-buffer
 542                      (format "*Key*%s" (epg-sub-key-id primary-sub-key)))))
 543     (set-buffer (cdr entry))
 544     (epa-key-mode)
 545     (make-local-variable 'epa-key)
 546     (setq epa-key key)
 547     (erase-buffer)
 548     (setq pointer (epg-key-user-id-list key))
 549     (while pointer
 550       (if (car pointer)
 551           (insert " "
 552                   (if (epg-user-id-validity (car pointer))
 553                       (char-to-string
 554                        (car (rassq (epg-user-id-validity (car pointer))
 555                                    epg-key-validity-alist)))
 556                     " ")
 557                   " "
 558                   (if (stringp (epg-user-id-string (car pointer)))
 559                       (epg-user-id-string (car pointer))
 560                     (epg-decode-dn (epg-user-id-string (car pointer))))
 561                   "\n"))
 562       (setq pointer (cdr pointer)))
 563     (setq pointer (epg-key-sub-key-list key))
 564     (while pointer
 565       (insert " "
 566               (if (epg-sub-key-validity (car pointer))
 567                   (char-to-string
 568                    (car (rassq (epg-sub-key-validity (car pointer))
 569                                epg-key-validity-alist)))
 570                 " ")
 571               " "
 572               (epg-sub-key-id (car pointer))
 573               " "
 574               (format "%dbits"
 575                       (epg-sub-key-length (car pointer)))
 576               " "
 577               (cdr (assq (epg-sub-key-algorithm (car pointer))
 578                          epg-pubkey-algorithm-alist))
 579               "\n\tCreated: "
 580               (condition-case nil
 581                   (format-time-string "%Y-%m-%d"
 582                                       (epg-sub-key-creation-time (car pointer)))
 583                 (error "????-??-??"))
 584               (if (epg-sub-key-expiration-time (car pointer))
 585                   (format (if (time-less-p (current-time)
 586                                            (epg-sub-key-expiration-time
 587                                             (car pointer)))
 588                               "\n\tExpires: %s"
 589                             "\n\tExpired: %s")
 590                           (condition-case nil
 591                               (format-time-string "%Y-%m-%d"
 592                                                   (epg-sub-key-expiration-time
 593                                                    (car pointer)))
 594                             (error "????-??-??")))
 595                 "")
 596               "\n\tCapabilities: "
 597               (mapconcat #'symbol-name
 598                          (epg-sub-key-capability (car pointer))
 599                          " ")
 600               "\n\tFingerprint: "
 601               (epg-sub-key-fingerprint (car pointer))
 602               "\n")
 603       (setq pointer (cdr pointer)))
 604     (goto-char (point-min))
 605     (pop-to-buffer (current-buffer))))
 606
 607 (defun epa-display-info (info)
 608   (if epa-popup-info-window
 609       (save-selected-window
 610         (unless (and epa-info-buffer (buffer-live-p epa-info-buffer))
 611           (setq epa-info-buffer (generate-new-buffer "*Info*")))
 612         (if (get-buffer-window epa-info-buffer)
 613             (delete-window (get-buffer-window epa-info-buffer)))
 614         (with-current-buffer epa-info-buffer
 615           (let ((inhibit-read-only t)
 616                 buffer-read-only)
 617             (erase-buffer)
 618             (insert info))
 619           (epa-info-mode)
 620           (goto-char (point-min)))
 621         (if (> (window-height)
 622                epa-info-window-height)
 623             (set-window-buffer (split-window nil (- (window-height)
 624                                                     epa-info-window-height))
 625                                epa-info-buffer)
 626           (pop-to-buffer epa-info-buffer)
 627           (if (> (window-height) epa-info-window-height)
 628               (shrink-window (- (window-height) epa-info-window-height)))))
 629     (message "%s" info)))
 630
 631 (defun epa-display-verify-result (verify-result)
 632   (epa-display-info (epg-verify-result-to-string verify-result)))
 633 (make-obsolete 'epa-display-verify-result 'epa-display-info "23.1")
 634
 635 (defun epa-passphrase-callback-function (context key-id handback)
 636   (if (eq key-id 'SYM)
 637       (read-passwd
 638        (format "Passphrase for symmetric encryption%s: "
 639                ;; Add the file name to the prompt, if any.
 640                (if (stringp handback)
 641                    (format " for %s" handback)
 642                  ""))
 643        (eq (epg-context-operation context) 'encrypt))
 644     (read-passwd
 645      (if (eq key-id 'PIN)
 646         "Passphrase for PIN: "
 647        (let ((entry (assoc key-id epg-user-id-alist)))
 648          (if entry
 649              (format "Passphrase for %s %s: " key-id (cdr entry))
 650            (format "Passphrase for %s: " key-id)))))))
 651
 652 (defun epa-progress-callback-function (_context what _char current total
 653                                                handback)
 654   (message "%s%d%% (%d/%d)" (or handback
 655                                 (concat what ": "))
 656            (if (> total 0) (floor (* (/ current (float total)) 100)) 0)
 657            current total))
 658
 659 ;;;###autoload
 660 (defun epa-decrypt-file (file)
 661   "Decrypt FILE."
 662   (interactive "fFile: ")
 663   (setq file (expand-file-name file))
 664   (let* ((default-name (file-name-sans-extension file))
 665          (plain (expand-file-name
 666                  (read-file-name
 667                   (concat "To file (default "
 668                           (file-name-nondirectory default-name)
 669                           ") ")
 670                   (file-name-directory default-name)
 671                   default-name)))
 672          (context (epg-make-context epa-protocol)))
 673     (epg-context-set-passphrase-callback context
 674                                          #'epa-passphrase-callback-function)
 675     (epg-context-set-progress-callback context
 676                                        (cons
 677                                         #'epa-progress-callback-function
 678                                         (format "Decrypting %s..."
 679                                                 (file-name-nondirectory file))))
 680     (message "Decrypting %s..." (file-name-nondirectory file))
 681     (epg-decrypt-file context file plain)
 682     (message "Decrypting %s...wrote %s" (file-name-nondirectory file)
 683              (file-name-nondirectory plain))
 684     (if (epg-context-result-for context 'verify)
 685         (epa-display-info (epg-verify-result-to-string
 686                            (epg-context-result-for context 'verify))))))
 687
 688 ;;;###autoload
 689 (defun epa-verify-file (file)
 690   "Verify FILE."
 691   (interactive "fFile: ")
 692   (setq file (expand-file-name file))
 693   (let* ((context (epg-make-context epa-protocol))
 694          (plain (if (equal (file-name-extension file) "sig")
 695                     (file-name-sans-extension file))))
 696     (epg-context-set-progress-callback context
 697                                        (cons
 698                                         #'epa-progress-callback-function
 699                                         (format "Verifying %s..."
 700                                                 (file-name-nondirectory file))))
 701     (message "Verifying %s..." (file-name-nondirectory file))
 702     (epg-verify-file context file plain)
 703     (message "Verifying %s...done" (file-name-nondirectory file))
 704     (if (epg-context-result-for context 'verify)
 705         (epa-display-info (epg-verify-result-to-string
 706                            (epg-context-result-for context 'verify))))))
 707
 708 (defun epa--read-signature-type ()
 709   (let (type c)
 710     (while (null type)
 711       (message "Signature type (n,c,d,?) ")
 712       (setq c (read-char))
 713       (cond ((eq c ?c)
 714              (setq type 'clear))
 715             ((eq c ?d)
 716              (setq type 'detached))
 717             ((eq c ??)
 718              (with-output-to-temp-buffer "*Help*"
 719                (with-current-buffer standard-output
 720                  (insert "\
 721 n - Create a normal signature
 722 c - Create a cleartext signature
 723 d - Create a detached signature
 724 ? - Show this help
 725 "))))
 726             (t
 727              (setq type 'normal))))
 728     type))
 729
 730 ;;;###autoload
 731 (defun epa-sign-file (file signers mode)
 732   "Sign FILE by SIGNERS keys selected."
 733   (interactive
 734    (let ((verbose current-prefix-arg))
 735      (list (expand-file-name (read-file-name "File: "))
 736            (if verbose
 737                (epa-select-keys (epg-make-context epa-protocol)
 738                                 "Select keys for signing.
 739 If no one is selected, default secret key is used.  "
 740                                 nil t))
 741            (if verbose
 742                (epa--read-signature-type)
 743              'clear))))
 744   (let ((signature (concat file
 745                            (if (eq epa-protocol 'OpenPGP)
 746                                (if (or epa-armor
 747                                        (not (memq mode
 748                                                   '(nil t normal detached))))
 749                                    ".asc"
 750                                  (if (memq mode '(t detached))
 751                                      ".sig"
 752                                    ".gpg"))
 753                              (if (memq mode '(t detached))
 754                                  ".p7s"
 755                                ".p7m"))))
 756         (context (epg-make-context epa-protocol)))
 757     (epg-context-set-armor context epa-armor)
 758     (epg-context-set-textmode context epa-textmode)
 759     (epg-context-set-signers context signers)
 760     (epg-context-set-passphrase-callback context
 761                                          #'epa-passphrase-callback-function)
 762     (epg-context-set-progress-callback context
 763                                        (cons
 764                                         #'epa-progress-callback-function
 765                                         (format "Signing %s..."
 766                                                 (file-name-nondirectory file))))
 767     (message "Signing %s..." (file-name-nondirectory file))
 768     (epg-sign-file context file signature mode)
 769     (message "Signing %s...wrote %s" (file-name-nondirectory file)
 770              (file-name-nondirectory signature))))
 771
 772 ;;;###autoload
 773 (defun epa-encrypt-file (file recipients)
 774   "Encrypt FILE for RECIPIENTS."
 775   (interactive
 776    (list (expand-file-name (read-file-name "File: "))
 777          (epa-select-keys (epg-make-context epa-protocol)
 778                           "Select recipients for encryption.
 779 If no one is selected, symmetric encryption will be performed.  ")))
 780   (let ((cipher (concat file (if (eq epa-protocol 'OpenPGP)
 781                                  (if epa-armor ".asc" ".gpg")
 782                                ".p7m")))
 783         (context (epg-make-context epa-protocol)))
 784     (epg-context-set-armor context epa-armor)
 785     (epg-context-set-textmode context epa-textmode)
 786     (epg-context-set-passphrase-callback context
 787                                          #'epa-passphrase-callback-function)
 788     (epg-context-set-progress-callback context
 789                                        (cons
 790                                         #'epa-progress-callback-function
 791                                         (format "Encrypting %s..."
 792                                                 (file-name-nondirectory file))))
 793     (message "Encrypting %s..." (file-name-nondirectory file))
 794     (epg-encrypt-file context file recipients cipher)
 795     (message "Encrypting %s...wrote %s" (file-name-nondirectory file)
 796              (file-name-nondirectory cipher))))
 797
 798 ;;;###autoload
 799 (defun epa-decrypt-region (start end)
 800   "Decrypt the current region between START and END.
 801
 802 Don't use this command in Lisp programs!
 803 Since this function operates on regions, it does some tricks such
 804 as coding-system detection and unibyte/multibyte conversion.  If
 805 you are sure how the data in the region should be treated, you
 806 should consider using the string based counterpart
 807 `epg-decrypt-string', or the file based counterpart
 808 `epg-decrypt-file' instead.
 809
 810 For example:
 811
 812 \(let ((context (epg-make-context 'OpenPGP)))
 813   (decode-coding-string
 814     (epg-decrypt-string context (buffer-substring start end))
 815     'utf-8))"
 816   (interactive "r")
 817   (save-excursion
 818     (let ((context (epg-make-context epa-protocol))
 819           plain)
 820       (epg-context-set-passphrase-callback context
 821                                            #'epa-passphrase-callback-function)
 822       (epg-context-set-progress-callback context
 823                                          (cons
 824                                           #'epa-progress-callback-function
 825                                           "Decrypting..."))
 826       (message "Decrypting...")
 827       (setq plain (epg-decrypt-string context (buffer-substring start end)))
 828       (message "Decrypting...done")
 829       (setq plain (epa--decode-coding-string
 830                    plain
 831                    (or coding-system-for-read
 832                        (get-text-property start 'epa-coding-system-used)
 833                        'undecided)))
 834       (if (y-or-n-p "Replace the original text? ")
 835           (let ((inhibit-read-only t)
 836                 buffer-read-only)
 837             (delete-region start end)
 838             (goto-char start)
 839             (insert plain))
 840         (with-output-to-temp-buffer "*Temp*"
 841           (set-buffer standard-output)
 842           (insert plain)
 843           (epa-info-mode)))
 844       (if (epg-context-result-for context 'verify)
 845           (epa-display-info (epg-verify-result-to-string
 846                              (epg-context-result-for context 'verify)))))))
 847
 848 (defun epa--find-coding-system-for-mime-charset (mime-charset)
 849   (if (featurep 'xemacs)
 850       (if (fboundp 'find-coding-system)
 851           (find-coding-system mime-charset))
 852     (let ((pointer (coding-system-list)))
 853       (while (and pointer
 854                   (eq (coding-system-get (car pointer) 'mime-charset)
 855                       mime-charset))
 856         (setq pointer (cdr pointer)))
 857       pointer)))
 858
 859 ;;;###autoload
 860 (defun epa-decrypt-armor-in-region (start end)
 861   "Decrypt OpenPGP armors in the current region between START and END.
 862
 863 Don't use this command in Lisp programs!
 864 See the reason described in the `epa-decrypt-region' documentation."
 865   (interactive "r")
 866   (save-excursion
 867     (save-restriction
 868       (narrow-to-region start end)
 869       (goto-char start)
 870       (let (armor-start armor-end)
 871         (while (re-search-forward "-----BEGIN PGP MESSAGE-----$" nil t)
 872           (setq armor-start (match-beginning 0)
 873                 armor-end (re-search-forward "^-----END PGP MESSAGE-----$"
 874                                              nil t))
 875           (unless armor-end
 876             (error "No armor tail"))
 877           (goto-char armor-start)
 878           (let ((coding-system-for-read
 879                  (or coding-system-for-read
 880                      (if (re-search-forward "^Charset: \\(.*\\)" armor-end t)
 881                          (epa--find-coding-system-for-mime-charset
 882                           (intern (downcase (match-string 1))))))))
 883             (goto-char armor-end)
 884             (epa-decrypt-region armor-start armor-end)))))))
 885
 886 ;;;###autoload
 887 (defun epa-verify-region (start end)
 888   "Verify the current region between START and END.
 889
 890 Don't use this command in Lisp programs!
 891 Since this function operates on regions, it does some tricks such
 892 as coding-system detection and unibyte/multibyte conversion.  If
 893 you are sure how the data in the region should be treated, you
 894 should consider using the string based counterpart
 895 `epg-verify-string', or the file based counterpart
 896 `epg-verify-file' instead.
 897
 898 For example:
 899
 900 \(let ((context (epg-make-context 'OpenPGP)))
 901   (decode-coding-string
 902     (epg-verify-string context (buffer-substring start end))
 903     'utf-8))"
 904   (interactive "r")
 905   (let ((context (epg-make-context epa-protocol))
 906         plain)
 907     (epg-context-set-progress-callback context
 908                                        (cons
 909                                         #'epa-progress-callback-function
 910                                         "Verifying..."))
 911     (message "Verifying...")
 912     (setq plain (epg-verify-string
 913                  context
 914                  (epa--encode-coding-string
 915                   (buffer-substring start end)
 916                   (or coding-system-for-write
 917                       (get-text-property start 'epa-coding-system-used)))))
 918     (message "Verifying...done")
 919     (setq plain (epa--decode-coding-string
 920                  plain
 921                  (or coding-system-for-read
 922                      (get-text-property start 'epa-coding-system-used)
 923                      'undecided)))
 924     (if (y-or-n-p "Replace the original text? ")
 925         (let ((inhibit-read-only t)
 926               buffer-read-only)
 927           (delete-region start end)
 928           (goto-char start)
 929           (insert plain))
 930       (with-output-to-temp-buffer "*Temp*"
 931         (set-buffer standard-output)
 932         (insert plain)
 933         (epa-info-mode)))
 934     (if (epg-context-result-for context 'verify)
 935         (epa-display-info (epg-verify-result-to-string
 936                            (epg-context-result-for context 'verify))))))
 937
 938 ;;;###autoload
 939 (defun epa-verify-cleartext-in-region (start end)
 940   "Verify OpenPGP cleartext signed messages in the current region
 941 between START and END.
 942
 943 Don't use this command in Lisp programs!
 944 See the reason described in the `epa-verify-region' documentation."
 945   (interactive "r")
 946   (save-excursion
 947     (save-restriction
 948       (narrow-to-region start end)
 949       (goto-char start)
 950       (let (cleartext-start cleartext-end)
 951         (while (re-search-forward "-----BEGIN PGP SIGNED MESSAGE-----$"
 952                                   nil t)
 953           (setq cleartext-start (match-beginning 0))
 954           (unless (re-search-forward "^-----BEGIN PGP SIGNATURE-----$"
 955                                            nil t)
 956             (error "Invalid cleartext signed message"))
 957           (setq cleartext-end (re-search-forward
 958                            "^-----END PGP SIGNATURE-----$"
 959                            nil t))
 960           (unless cleartext-end
 961             (error "No cleartext tail"))
 962           (epa-verify-region cleartext-start cleartext-end))))))
 963
 964 (eval-and-compile
 965   (if (fboundp 'select-safe-coding-system)
 966       (defalias 'epa--select-safe-coding-system 'select-safe-coding-system)
 967     (defun epa--select-safe-coding-system (_from _to)
 968       buffer-file-coding-system)))
 969
 970 ;;;###autoload
 971 (defun epa-sign-region (start end signers mode)
 972   "Sign the current region between START and END by SIGNERS keys selected.
 973
 974 Don't use this command in Lisp programs!
 975 Since this function operates on regions, it does some tricks such
 976 as coding-system detection and unibyte/multibyte conversion.  If
 977 you are sure how the data should be treated, you should consider
 978 using the string based counterpart `epg-sign-string', or the file
 979 based counterpart `epg-sign-file' instead.
 980
 981 For example:
 982
 983 \(let ((context (epg-make-context 'OpenPGP)))
 984   (epg-sign-string
 985     context
 986     (encode-coding-string (buffer-substring start end) 'utf-8)))"
 987   (interactive
 988    (let ((verbose current-prefix-arg))
 989      (setq epa-last-coding-system-specified
 990            (or coding-system-for-write
 991                (epa--select-safe-coding-system
 992                 (region-beginning) (region-end))))
 993      (list (region-beginning) (region-end)
 994            (if verbose
 995                (epa-select-keys (epg-make-context epa-protocol)
 996                                 "Select keys for signing.
 997 If no one is selected, default secret key is used.  "
 998                                 nil t))
 999            (if verbose
1000                (epa--read-signature-type)
1001              'clear))))
1002   (save-excursion
1003     (let ((context (epg-make-context epa-protocol))
1004           signature)
1005       ;;(epg-context-set-armor context epa-armor)
1006       (epg-context-set-armor context t)
1007       ;;(epg-context-set-textmode context epa-textmode)
1008       (epg-context-set-textmode context t)
1009       (epg-context-set-signers context signers)
1010       (epg-context-set-passphrase-callback context
1011                                            #'epa-passphrase-callback-function)
1012       (epg-context-set-progress-callback context
1013                                          (cons
1014                                           #'epa-progress-callback-function
1015                                           "Signing..."))
1016       (message "Signing...")
1017       (setq signature (epg-sign-string context
1018                                        (epa--encode-coding-string
1019                                         (buffer-substring start end)
1020                                         epa-last-coding-system-specified)
1021                                        mode))
1022       (message "Signing...done")
1023       (delete-region start end)
1024       (goto-char start)
1025       (add-text-properties (point)
1026                            (progn
1027                              (insert (epa--decode-coding-string
1028                                       signature
1029                                       (or coding-system-for-read
1030                                           epa-last-coding-system-specified)))
1031                              (point))
1032                            (list 'epa-coding-system-used
1033                                  epa-last-coding-system-specified
1034                                  'front-sticky nil
1035                                  'rear-nonsticky t
1036                                  'start-open t
1037                                  'end-open t)))))
1038
1039 (eval-and-compile
1040   (if (fboundp 'derived-mode-p)
1041       (defalias 'epa--derived-mode-p 'derived-mode-p)
1042     (defun epa--derived-mode-p (&rest modes)
1043       "Non-nil if the current major mode is derived from one of MODES.
1044 Uses the `derived-mode-parent' property of the symbol to trace backwards."
1045       (let ((parent major-mode))
1046         (while (and (not (memq parent modes))
1047                     (setq parent (get parent 'derived-mode-parent))))
1048         parent))))
1049
1050 ;;;###autoload
1051 (defun epa-encrypt-region (start end recipients sign signers)
1052   "Encrypt the current region between START and END for RECIPIENTS.
1053
1054 Don't use this command in Lisp programs!
1055 Since this function operates on regions, it does some tricks such
1056 as coding-system detection and unibyte/multibyte conversion.  If
1057 you are sure how the data should be treated, you should consider
1058 using the string based counterpart `epg-encrypt-string', or the
1059 file based counterpart `epg-encrypt-file' instead.
1060
1061 For example:
1062
1063 \(let ((context (epg-make-context 'OpenPGP)))
1064   (epg-encrypt-string
1065     context
1066     (encode-coding-string (buffer-substring start end) 'utf-8)
1067     nil))"
1068   (interactive
1069    (let ((verbose current-prefix-arg)
1070          (context (epg-make-context epa-protocol))
1071          sign)
1072      (setq epa-last-coding-system-specified
1073            (or coding-system-for-write
1074                (epa--select-safe-coding-system
1075                 (region-beginning) (region-end))))
1076      (list (region-beginning) (region-end)
1077            (epa-select-keys context
1078                             "Select recipients for encryption.
1079 If no one is selected, symmetric encryption will be performed.  ")
1080            (setq sign (if verbose (y-or-n-p "Sign? ")))
1081            (if sign
1082                (epa-select-keys context
1083                                 "Select keys for signing.  ")))))
1084   (save-excursion
1085     (let ((context (epg-make-context epa-protocol))
1086           cipher)
1087       ;;(epg-context-set-armor context epa-armor)
1088       (epg-context-set-armor context t)
1089       ;;(epg-context-set-textmode context epa-textmode)
1090       (epg-context-set-textmode context t)
1091       (if sign
1092           (epg-context-set-signers context signers))
1093       (epg-context-set-passphrase-callback context
1094                                            #'epa-passphrase-callback-function)
1095       (epg-context-set-progress-callback context
1096                                          (cons
1097                                           #'epa-progress-callback-function
1098                                           "Encrypting..."))
1099       (message "Encrypting...")
1100       (setq cipher (epg-encrypt-string context
1101                                        (epa--encode-coding-string
1102                                         (buffer-substring start end)
1103                                         epa-last-coding-system-specified)
1104                                        recipients
1105                                        sign))
1106       (message "Encrypting...done")
1107       (delete-region start end)
1108       (goto-char start)
1109       (add-text-properties (point)
1110                            (progn
1111                              (insert cipher)
1112                              (point))
1113                            (list 'epa-coding-system-used
1114                                  epa-last-coding-system-specified
1115                                  'front-sticky nil
1116                                  'rear-nonsticky t
1117                                  'start-open t
1118                                  'end-open t)))))
1119
1120 ;;;###autoload
1121 (defun epa-delete-keys (keys &optional allow-secret)
1122   "Delete selected KEYS."
1123   (interactive
1124    (let ((keys (epa--marked-keys)))
1125      (unless keys
1126        (error "No keys selected"))
1127      (list keys
1128            (eq (nth 1 epa-list-keys-arguments) t))))
1129   (let ((context (epg-make-context epa-protocol)))
1130     (message "Deleting...")
1131     (epg-delete-keys context keys allow-secret)
1132     (message "Deleting...done")
1133     (apply #'epa--list-keys epa-list-keys-arguments)))
1134
1135 ;;;###autoload
1136 (defun epa-import-keys (file)
1137   "Import keys from FILE."
1138   (interactive "fFile: ")
1139   (setq file (expand-file-name file))
1140   (let ((context (epg-make-context epa-protocol)))
1141     (message "Importing %s..." (file-name-nondirectory file))
1142     (condition-case nil
1143         (progn
1144           (epg-import-keys-from-file context file)
1145           (message "Importing %s...done" (file-name-nondirectory file)))
1146       (error
1147        (message "Importing %s...failed" (file-name-nondirectory file))))
1148     (if (epg-context-result-for context 'import)
1149         (epa-display-info (epg-import-result-to-string
1150                            (epg-context-result-for context 'import))))
1151     (if (eq major-mode 'epa-key-list-mode)
1152         (apply #'epa--list-keys epa-list-keys-arguments))))
1153
1154 ;;;###autoload
1155 (defun epa-import-keys-region (start end)
1156   "Import keys from the region."
1157   (interactive "r")
1158   (let ((context (epg-make-context epa-protocol)))
1159     (message "Importing...")
1160     (condition-case nil
1161         (progn
1162           (epg-import-keys-from-string context (buffer-substring start end))
1163           (message "Importing...done"))
1164       (error
1165        (message "Importing...failed")))
1166     (if (epg-context-result-for context 'import)
1167         (epa-display-info (epg-import-result-to-string
1168                            (epg-context-result-for context 'import))))))
1169
1170 ;;;###autoload
1171 (defun epa-import-armor-in-region (start end)
1172   "Import keys in the OpenPGP armor format in the current region
1173 between START and END."
1174   (interactive "r")
1175   (save-excursion
1176     (save-restriction
1177       (narrow-to-region start end)
1178       (goto-char start)
1179       (let (armor-start armor-end)
1180         (while (re-search-forward
1181                 "-----BEGIN \\(PGP \\(PUBLIC\\|PRIVATE\\) KEY BLOCK\\)-----$"
1182                 nil t)
1183           (setq armor-start (match-beginning 0)
1184                 armor-end (re-search-forward
1185                            (concat "^-----END " (match-string 1) "-----$")
1186                            nil t))
1187           (unless armor-end
1188             (error "No armor tail"))
1189           (epa-import-keys-region armor-start armor-end))))))
1190
1191 ;;;###autoload
1192 (defun epa-export-keys (keys file)
1193   "Export selected KEYS to FILE."
1194   (interactive
1195    (let ((keys (epa--marked-keys))
1196          default-name)
1197      (unless keys
1198        (error "No keys selected"))
1199      (setq default-name
1200            (expand-file-name
1201             (concat (epg-sub-key-id (car (epg-key-sub-key-list (car keys))))
1202                     (if epa-armor ".asc" ".gpg"))
1203             default-directory))
1204      (list keys
1205            (expand-file-name
1206             (read-file-name
1207              (concat "To file (default "
1208                      (file-name-nondirectory default-name)
1209                      ") ")
1210              (file-name-directory default-name)
1211              default-name)))))
1212   (let ((context (epg-make-context epa-protocol)))
1213     (epg-context-set-armor context epa-armor)
1214     (message "Exporting to %s..." (file-name-nondirectory file))
1215     (epg-export-keys-to-file context keys file)
1216     (message "Exporting to %s...done" (file-name-nondirectory file))))
1217
1218 ;;;###autoload
1219 (defun epa-insert-keys (keys)
1220   "Insert selected KEYS after the point."
1221   (interactive
1222    (list (epa-select-keys (epg-make-context epa-protocol)
1223                           "Select keys to export.  ")))
1224   (let ((context (epg-make-context epa-protocol)))
1225     ;;(epg-context-set-armor context epa-armor)
1226     (epg-context-set-armor context t)
1227     (insert (epg-export-keys-to-string context keys))))
1228
1229 ;; (defun epa-sign-keys (keys &optional local)
1230 ;;   "Sign selected KEYS.
1231 ;; If a prefix-arg is specified, the signature is marked as non exportable.
1232
1233 ;; Don't use this command in Lisp programs!"
1234 ;;   (interactive
1235 ;;    (let ((keys (epa--marked-keys)))
1236 ;;      (unless keys
1237 ;;        (error "No keys selected"))
1238 ;;      (list keys current-prefix-arg)))
1239 ;;   (let ((context (epg-make-context epa-protocol)))
1240 ;;     (epg-context-set-passphrase-callback context
1241 ;;                                       #'epa-passphrase-callback-function)
1242 ;;     (epg-context-set-progress-callback context
1243 ;;                                     (cons
1244 ;;                                      #'epa-progress-callback-function
1245 ;;                                      "Signing keys..."))
1246 ;;     (message "Signing keys...")
1247 ;;     (epg-sign-keys context keys local)
1248 ;;     (message "Signing keys...done")))
1249 ;; (make-obsolete 'epa-sign-keys "Do not use.")
1250
1251 (provide 'epa)
1252
1253 ;;; epa.el ends here