This file is indexed.

/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.

The actual contents of the file can be viewed below.

  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