/usr/share/emacs/site-lisp/semi/mime-pgp.el is in semi 1.14.7~0.20120428-7.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 | ;;; mime-pgp.el --- mime-view internal methods for EasyPG.
;; Copyright (C) 1995,1996,1997,1998,1999,2000 Free Software Foundation, Inc.
;; Author: MORIOKA Tomohiko <tomo@m17n.org>
;; Daiki Ueno <ueno@unixuser.org>
;; Kazuhiro Ito <kzhr@d1.dion.ne.jp>
;; Created: 1995/12/7
;; Renamed: 1997/2/27 from tm-pgp.el
;; Renamed: 2010/11/27 from mime-pgp.el in emiko-epg
;; Renamed: 2012/10/05 from mime-epg.el
;; Keywords: PGP, security, MIME, multimedia, mail, news
;; This file is part of SEMI (Secure Emacs MIME Interface).
;; This program 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.
;; This program 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; Code:
(require 'mime-play)
(require 'epg)
(require 'epa)
(eval-when-compile (require 'mmgeneric))
(defcustom mime-pgp-verify-when-preview t
"When non-nil, verify signed part while viewing."
:group 'mime-view
:type 'boolean)
(defcustom mime-pgp-decrypt-when-preview nil
"When non-nil, decrypt encrypted part while viewing."
:group 'mime-view
:type 'boolean)
;;; @ Internal method for multipart/signed
(defun mime-verify-multipart/signed (entity situation)
"Internal method to verify multipart/signed."
(mime-play-entity
(nth 1 (mime-entity-children entity)) ; entity-info of signature
(list (assq 'mode situation)) ; play-mode
))
;;; @ Internal method for multipart/signed
(defun mime-display-multipart/signed (entity situation)
(let ((original-major-mode-cell (assq 'major-mode situation))
(default-situation
(cdr (assq 'childrens-situation situation)))
child-situation)
(when original-major-mode-cell
(setq default-situation
(cons original-major-mode-cell default-situation)))
(mapc
(lambda (child)
(setq child-situation
(mime-find-entity-preview-situation child default-situation))
(mime-display-entity
child
(if (and (eq (cdr (assq 'type child-situation)) 'application)
(memq (cdr (assq 'subtype child-situation))
'(pgp-signature pkcs7-signature)))
(put-alist 'body (if mime-pgp-verify-when-preview
'visible
'invisible)
(copy-alist child-situation))
child-situation)))
(mime-entity-children entity))))
;;; @ Internal method for multipart/encrypted
(defun mime-display-multipart/pgp-encrypted (entity situation)
(let ((original-major-mode-cell (assq 'major-mode situation))
(default-situation
(cdr (assq 'childrens-situation situation)))
child-situation)
(unless mime-pgp-decrypt-when-preview
(insert "This part is encrypted.\n"))
(when original-major-mode-cell
(setq default-situation
(cons original-major-mode-cell default-situation)))
(mapc
(lambda (child)
(setq child-situation
(mime-find-entity-preview-situation child default-situation))
(if (and (eq (cdr (assq 'type child-situation)) 'application)
(eq (cdr (assq 'subtype child-situation)) 'pgp-encrypted))
(mime-display-entity
child (put-alist 'body (if mime-pgp-decrypt-when-preview
'visible
'invisible)
(copy-alist child-situation)))
(when mime-view-multipart/related-show-all-children
(mime-display-entity
child (put-alist 'body 'invisible (copy-alist child-situation))))))
(mime-entity-children entity))))
;;; @ Internal method for application/*-signature
(defun mime-verify-application/*-signature-internal (entity situation)
(let* ((mother (mime-entity-parent entity))
(orig-entity (car (mime-entity-children mother)))
(protocol (cdr (assoc "protocol" (mime-entity-parameters mother))))
context)
(if (null protocol)
"No protocol is specified."
(setq context
(epg-make-context
(cond
((equal protocol "application/pgp-signature")
'OpenPGP)
((string-match
"\\`application/\\(x-\\)?pkcs7-signature\\'" protocol)
'CMS))))
(if (null context)
(format "Unknown protocol: %s." protocol)
(epg-verify-string context
(mime-entity-content entity)
(with-temp-buffer
(if (fboundp 'set-buffer-multibyte)
(set-buffer-multibyte nil))
(mime-insert-entity orig-entity)
(goto-char (point-min))
(while (search-forward "\n" nil t)
(replace-match "\r\n"))
(buffer-substring (point-min) (point-max))))
(epg-context-result-for context 'verify)))))
(defun mime-verify-application/*-signature (entity situation)
(let ((verify-result
(mime-verify-application/*-signature-internal entity situation)))
(cond
((stringp verify-result)
(mime-show-echo-buffer verify-result))
((> (length verify-result) 1)
(mime-show-echo-buffer (epg-verify-result-to-string verify-result)))
(verify-result
(epa-display-info (epg-verify-result-to-string verify-result))))))
(defun mime-preview-application/*-signature (entity situation)
(let ((verify-result
(condition-case error
(mime-verify-application/*-signature-internal entity situation)
(error (format "Verification failed, %s" error))))
string)
(if (stringp verify-result)
(insert verify-result)
(setq string (epg-verify-result-to-string verify-result))
(when (> (length string) 0)
(unless (string-equal (substring string -1) "\n")
(setq string (concat string "\n")))
(insert string)))))
;;; @ Internal method for application/pgp-encrypted
(defun mime-decrypt-application/pgp-encrypted (entity situation)
(let* ((mother (mime-entity-parent entity))
(encrypted-entity (nth 1 (mime-entity-children mother)))
(p-win (or (get-buffer-window (current-buffer))
(get-largest-window)))
(new-name
(format "%s-%s" (buffer-name) (mime-entity-number entity)))
(mother (current-buffer))
(preview-buffer (concat "*Preview-" (buffer-name) "*"))
representation-type message-buf context plain verify-result)
(set-buffer (setq message-buf (get-buffer-create new-name)))
(erase-buffer)
(mime-insert-entity encrypted-entity)
(goto-char (point-min))
(setq context (epg-make-context)
plain (decode-coding-string
(epg-decrypt-string
context
(buffer-substring (point-min)(point-max)))
'raw-text))
(delete-region (point-min)(point-max))
(insert plain)
(setq representation-type 'binary
major-mode 'mime-show-message-mode)
(save-window-excursion
(mime-view-buffer nil preview-buffer mother
nil representation-type)
(make-local-variable 'mime-view-temp-message-buffer)
(setq mime-view-temp-message-buffer message-buf))
(set-window-buffer p-win preview-buffer)
(setq verify-result (epg-context-result-for context 'verify))
(if (> (length verify-result) 1)
(mime-show-echo-buffer (epg-verify-result-to-string verify-result))
(if verify-result
(epa-display-info (epg-verify-result-to-string verify-result))))))
(defvar mime-pgp-decrypted-buffers nil)
(defun mime-pgp-kill-decrypted-buffers ()
(mapc (lambda (buffer)
(when (bufferp buffer)
(kill-buffer buffer)))
mime-pgp-decrypted-buffers))
;; Imported and modified from Wanderlust.
(defun mime-preview-application/pgp-encrypted (entity situation)
(let ((p (point-max))
beg end buffer decrypted-entity)
(goto-char p)
(save-restriction
(narrow-to-region p p)
(setq buffer (generate-new-buffer (concat mime-temp-buffer-name "PGP*")))
(add-hook 'kill-buffer-hook 'mime-pgp-kill-decrypted-buffers nil t)
(make-local-variable 'mime-pgp-decrypted-buffers)
(add-to-list 'mime-pgp-decrypted-buffers buffer)
(with-current-buffer buffer
(mime-insert-entity
(nth 1 (mime-entity-children (mime-entity-parent entity))))
(setq beg (point-min)
end (point-max))
(insert (prog1 (decode-coding-string
(epg-decrypt-string
(epg-make-context) (buffer-substring beg end))
'raw-text)
(delete-region beg end)))
(setq decrypted-entity
(mime-parse-message
(mm-expand-class-name 'buffer)
nil entity (mime-entity-node-id-internal entity))
buffer-read-only t))
(mime-display-entity
decrypted-entity nil '((header . visible)
(body . visible)
(entity-button . invisible))))))
;;; @ Internal method for application/pgp-keys
(defun mime-add-application/pgp-keys (entity situation)
(epg-import-keys-from-string (epg-make-context)
(mime-entity-content entity)))
;;; @ Internal method for application/pkcs7-mime
(defun mime-view-application/pkcs7-mime (entity situation)
(let* ((p-win (or (get-buffer-window (current-buffer))
(get-largest-window)))
(new-name
(format "%s-%s" (buffer-name) (mime-entity-number entity)))
(mother (current-buffer))
(preview-buffer (concat "*Preview-" (buffer-name) "*"))
(context (epg-make-context 'CMS))
message-buf)
(when (memq (or (cdr (assq 'smime-type situation)) 'enveloped-data)
'(enveloped-data signed-data))
(set-buffer (setq message-buf (get-buffer-create new-name)))
(let ((inhibit-read-only t)
buffer-read-only)
(erase-buffer)
(insert (epg-decrypt-string context (mime-entity-content entity))))
(setq major-mode 'mime-show-message-mode)
(save-window-excursion
(mime-view-buffer nil preview-buffer mother
nil 'binary)
(make-local-variable 'mime-view-temp-message-buffer)
(setq mime-view-temp-message-buffer message-buf))
(set-window-buffer p-win preview-buffer))))
;;; @ end
;;;
(provide 'mime-pgp)
(run-hooks 'mime-pgp-load-hook)
;;; mime-pgp.el ends here
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