HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| 23f87bed | 1 | ;;; mml2015.el --- MIME Security with Pretty Good Privacy (PGP) |
| e84b4b86 | 2 | |
| ba318903 | 3 | ;; Copyright (C) 2000-2014 Free Software Foundation, Inc. |
| 23f87bed MB |
4 | |
| 5 | ;; Author: Shenghuo Zhu <zsh@cs.rochester.edu> | |
| 6 | ;; Keywords: PGP MIME MML | |
| 7 | ||
| 8 | ;; This file is part of GNU Emacs. | |
| 9 | ||
| 5e809f55 GM |
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. | |
| 23f87bed | 14 | |
| 5e809f55 GM |
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. | |
| 23f87bed MB |
19 | |
| 20 | ;; You should have received a copy of the GNU General Public License | |
| 5e809f55 | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
| 23f87bed MB |
22 | |
| 23 | ;;; Commentary: | |
| 24 | ||
| 25 | ;; RFC 2015 is updated by RFC 3156, this file should be compatible | |
| 26 | ;; with both. | |
| 27 | ||
| 28 | ;;; Code: | |
| 29 | ||
| 5a12b40c | 30 | (eval-and-compile |
| aa8f8277 GM |
31 | (if (locate-library "password-cache") |
| 32 | (require 'password-cache) | |
| 33 | (require 'password))) | |
| 5a12b40c | 34 | |
| 23f87bed MB |
35 | (eval-when-compile (require 'cl)) |
| 36 | (require 'mm-decode) | |
| 37 | (require 'mm-util) | |
| 38 | (require 'mml) | |
| 01c52d31 | 39 | (require 'mml-sec) |
| 23f87bed | 40 | |
| 4ae9592b JB |
41 | (defvar mc-pgp-always-sign) |
| 42 | ||
| 5a12b40c GM |
43 | (declare-function epg-check-configuration "ext:epg-config" |
| 44 | (config &optional minimum-version)) | |
| 45 | (declare-function epg-configuration "ext:epg-config" ()) | |
| 46 | ||
| 59c88671 GM |
47 | ;; Maybe this should be in eg mml-sec.el (and have a different name). |
| 48 | ;; Then mml1991 would not need to require mml2015, and mml1991-use | |
| 49 | ;; could be removed. | |
| 23f87bed | 50 | (defvar mml2015-use (or |
| 4d2226bf G |
51 | (progn |
| 52 | (ignore-errors (require 'epg-config)) | |
| 53 | (and (fboundp 'epg-check-configuration) | |
| 54 | 'epg)) | |
| 23f87bed | 55 | (progn |
| 9ccd6e90 DU |
56 | (let ((abs-file (locate-library "pgg"))) |
| 57 | ;; Don't load PGG if it is marked as obsolete | |
| 58 | ;; (Emacs 24). | |
| 59 | (when (and abs-file | |
| 34d0a923 KY |
60 | (not (string-match "/obsolete/[^/]*\\'" |
| 61 | abs-file))) | |
| 9ccd6e90 DU |
62 | (ignore-errors (require 'pgg)) |
| 63 | (and (fboundp 'pgg-sign-region) | |
| 64 | 'pgg)))) | |
| 23f87bed MB |
65 | (progn (ignore-errors |
| 66 | (load "mc-toplev")) | |
| 67 | (and (fboundp 'mc-encrypt-generic) | |
| 68 | (fboundp 'mc-sign-generic) | |
| 69 | (fboundp 'mc-cleanup-recipient-headers) | |
| 70 | 'mailcrypt))) | |
| 01c52d31 | 71 | "The package used for PGP/MIME. |
| 8ccbef23 | 72 | Valid packages include `epg', `pgg' and `mailcrypt'.") |
| 23f87bed MB |
73 | |
| 74 | ;; Something is not RFC2015. | |
| 75 | (defvar mml2015-function-alist | |
| 76 | '((mailcrypt mml2015-mailcrypt-sign | |
| 77 | mml2015-mailcrypt-encrypt | |
| 78 | mml2015-mailcrypt-verify | |
| 79 | mml2015-mailcrypt-decrypt | |
| 80 | mml2015-mailcrypt-clear-verify | |
| 81 | mml2015-mailcrypt-clear-decrypt) | |
| 8ccbef23 G |
82 | (pgg mml2015-pgg-sign |
| 83 | mml2015-pgg-encrypt | |
| 84 | mml2015-pgg-verify | |
| 85 | mml2015-pgg-decrypt | |
| 86 | mml2015-pgg-clear-verify | |
| 87 | mml2015-pgg-clear-decrypt) | |
| 88 | (epg mml2015-epg-sign | |
| 89 | mml2015-epg-encrypt | |
| 90 | mml2015-epg-verify | |
| 91 | mml2015-epg-decrypt | |
| 92 | mml2015-epg-clear-verify | |
| 93 | mml2015-epg-clear-decrypt)) | |
| 23f87bed MB |
94 | "Alist of PGP/MIME functions.") |
| 95 | ||
| 96 | (defvar mml2015-result-buffer nil) | |
| 97 | ||
| 98 | (defcustom mml2015-unabbrev-trust-alist | |
| 99 | '(("TRUST_UNDEFINED" . nil) | |
| 100 | ("TRUST_NEVER" . nil) | |
| 101 | ("TRUST_MARGINAL" . t) | |
| 102 | ("TRUST_FULLY" . t) | |
| 103 | ("TRUST_ULTIMATE" . t)) | |
| 104 | "Map GnuPG trust output values to a boolean saying if you trust the key." | |
| bf247b6e | 105 | :version "22.1" |
| e79f14a4 | 106 | :group 'mime-security |
| 23f87bed MB |
107 | :type '(repeat (cons (regexp :tag "GnuPG output regexp") |
| 108 | (boolean :tag "Trust key")))) | |
| 109 | ||
| 01c52d31 MB |
110 | (defcustom mml2015-cache-passphrase mml-secure-cache-passphrase |
| 111 | "If t, cache passphrase." | |
| 112 | :group 'mime-security | |
| 113 | :type 'boolean) | |
| 114 | ||
| 115 | (defcustom mml2015-passphrase-cache-expiry mml-secure-passphrase-cache-expiry | |
| 116 | "How many seconds the passphrase is cached. | |
| 117 | Whether the passphrase is cached at all is controlled by | |
| 118 | `mml2015-cache-passphrase'." | |
| 119 | :group 'mime-security | |
| 120 | :type 'integer) | |
| 121 | ||
| 122 | (defcustom mml2015-signers nil | |
| e8797701 | 123 | "A list of your own key ID(s) which will be used to sign a message. |
| bb760c5d | 124 | If set, it overrides the setting of `mml2015-sign-with-sender'." |
| 01c52d31 MB |
125 | :group 'mime-security |
| 126 | :type '(repeat (string :tag "Key ID"))) | |
| 127 | ||
| 19cc6697 G |
128 | (defcustom mml2015-sign-with-sender nil |
| 129 | "If t, use message sender so find a key to sign with." | |
| 130 | :group 'mime-security | |
| 131 | :type 'boolean | |
| 132 | :version "24.1") | |
| 133 | ||
| 01c52d31 MB |
134 | (defcustom mml2015-encrypt-to-self nil |
| 135 | "If t, add your own key ID to recipient list when encryption." | |
| 136 | :group 'mime-security | |
| 137 | :type 'boolean) | |
| 138 | ||
| 139 | (defcustom mml2015-always-trust t | |
| 140 | "If t, GnuPG skip key validation on encryption." | |
| 141 | :group 'mime-security | |
| 142 | :type 'boolean) | |
| 143 | ||
| 0583b686 DE |
144 | (defcustom mml2015-maximum-key-image-dimension 64 |
| 145 | "The maximum dimension (width or height) of any key images." | |
| 7cb18056 | 146 | :version "24.4" |
| 0583b686 DE |
147 | :group 'mime-security |
| 148 | :type 'integer) | |
| 149 | ||
| 01c52d31 MB |
150 | ;; Extract plaintext from cleartext signature. IMO, this kind of task |
| 151 | ;; should be done by GnuPG rather than Elisp, but older PGP backends | |
| 8ccbef23 | 152 | ;; (such as Mailcrypt, and PGG) discard the output from GnuPG. |
| 01c52d31 | 153 | (defun mml2015-extract-cleartext-signature () |
| 8f7abae3 MB |
154 | ;; Daiki Ueno in |
| 155 | ;; <54a15d860801080142l70b95d7dkac4bf51a86196011@mail.gmail.com>: ``I still | |
| 156 | ;; believe that the right way is to use the plaintext output from GnuPG as | |
| 157 | ;; it is, and mml2015-extract-cleartext-signature is just a kludge for | |
| 158 | ;; misdesigned libraries like PGG, which have no ability to do that. So, I | |
| 159 | ;; think it should not have descriptive documentation.'' | |
| 160 | ;; | |
| 161 | ;; This function doesn't handle NotDashEscaped correctly. EasyPG handles it | |
| 162 | ;; correctly. | |
| 163 | ;; http://thread.gmane.org/gmane.emacs.gnus.general/66062/focus=66082 | |
| 164 | ;; http://thread.gmane.org/gmane.emacs.gnus.general/65087/focus=65109 | |
| 01c52d31 MB |
165 | (goto-char (point-min)) |
| 166 | (forward-line) | |
| 167 | ;; We need to be careful not to strip beyond the armor headers. | |
| 168 | ;; Previously, an attacker could replace the text inside our | |
| 169 | ;; markup with trailing garbage by injecting whitespace into the | |
| 170 | ;; message. | |
| 171 | (while (looking-at "Hash:") ; The only header allowed in cleartext | |
| 172 | (forward-line)) ; signatures according to RFC2440. | |
| 173 | (when (looking-at "[\t ]*$") | |
| 174 | (forward-line)) | |
| 175 | (delete-region (point-min) (point)) | |
| 176 | (if (re-search-forward "^-----BEGIN PGP SIGNATURE-----" nil t) | |
| 177 | (delete-region (match-beginning 0) (point-max))) | |
| 178 | (goto-char (point-min)) | |
| 179 | (while (re-search-forward "^- " nil t) | |
| 180 | (replace-match "" t t) | |
| 181 | (forward-line 1))) | |
| 182 | ||
| 23f87bed MB |
183 | ;;; mailcrypt wrapper |
| 184 | ||
| 8abf1b22 GM |
185 | (autoload 'mailcrypt-decrypt "mailcrypt") |
| 186 | (autoload 'mailcrypt-verify "mailcrypt") | |
| 187 | (autoload 'mc-pgp-always-sign "mailcrypt") | |
| 188 | (autoload 'mc-encrypt-generic "mc-toplev") | |
| 189 | (autoload 'mc-cleanup-recipient-headers "mc-toplev") | |
| 190 | (autoload 'mc-sign-generic "mc-toplev") | |
| 23f87bed | 191 | |
| 23f87bed MB |
192 | (defvar mml2015-decrypt-function 'mailcrypt-decrypt) |
| 193 | (defvar mml2015-verify-function 'mailcrypt-verify) | |
| 194 | ||
| 195 | (defun mml2015-format-error (err) | |
| 196 | (if (stringp (cadr err)) | |
| 197 | (cadr err) | |
| 198 | (format "%S" (cdr err)))) | |
| 199 | ||
| 200 | (defun mml2015-mailcrypt-decrypt (handle ctl) | |
| 201 | (catch 'error | |
| 202 | (let (child handles result) | |
| 203 | (unless (setq child (mm-find-part-by-type | |
| 204 | (cdr handle) | |
| 205 | "application/octet-stream" nil t)) | |
| 206 | (mm-set-handle-multipart-parameter | |
| 207 | mm-security-handle 'gnus-info "Corrupted") | |
| 208 | (throw 'error handle)) | |
| 209 | (with-temp-buffer | |
| 210 | (mm-insert-part child) | |
| 211 | (setq result | |
| 212 | (condition-case err | |
| 213 | (funcall mml2015-decrypt-function) | |
| 214 | (error | |
| 215 | (mm-set-handle-multipart-parameter | |
| 216 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
| 217 | nil) | |
| 218 | (quit | |
| 219 | (mm-set-handle-multipart-parameter | |
| 220 | mm-security-handle 'gnus-details "Quit.") | |
| 221 | nil))) | |
| 222 | (unless (car result) | |
| 223 | (mm-set-handle-multipart-parameter | |
| 224 | mm-security-handle 'gnus-info "Failed") | |
| 225 | (throw 'error handle)) | |
| 226 | (setq handles (mm-dissect-buffer t))) | |
| 227 | (mm-destroy-parts handle) | |
| 228 | (mm-set-handle-multipart-parameter | |
| 229 | mm-security-handle 'gnus-info | |
| 230 | (concat "OK" | |
| 231 | (let ((sig (with-current-buffer mml2015-result-buffer | |
| 232 | (mml2015-gpg-extract-signature-details)))) | |
| 233 | (concat ", Signer: " sig)))) | |
| 234 | (if (listp (car handles)) | |
| 235 | handles | |
| 236 | (list handles))))) | |
| 237 | ||
| 8ccbef23 G |
238 | (defun mml2015-gpg-pretty-print-fpr (fingerprint) |
| 239 | (let* ((result "") | |
| 240 | (fpr-length (string-width fingerprint)) | |
| 241 | (n-slice 0) | |
| 242 | slice) | |
| 243 | (setq fingerprint (string-to-list fingerprint)) | |
| 244 | (while fingerprint | |
| 245 | (setq fpr-length (- fpr-length 4)) | |
| 246 | (setq slice (butlast fingerprint fpr-length)) | |
| 247 | (setq fingerprint (nthcdr 4 fingerprint)) | |
| 248 | (setq n-slice (1+ n-slice)) | |
| 249 | (setq result | |
| 250 | (concat | |
| 251 | result | |
| 252 | (case n-slice | |
| 253 | (1 slice) | |
| 254 | (otherwise (concat " " slice)))))) | |
| 255 | result)) | |
| 256 | ||
| 257 | (defun mml2015-gpg-extract-signature-details () | |
| 258 | (goto-char (point-min)) | |
| 259 | (let* ((expired (re-search-forward | |
| 260 | "^\\[GNUPG:\\] SIGEXPIRED$" | |
| 261 | nil t)) | |
| 262 | (signer (and (re-search-forward | |
| 263 | "^\\[GNUPG:\\] GOODSIG \\([0-9A-Za-z]*\\) \\(.*\\)$" | |
| 264 | nil t) | |
| 265 | (cons (match-string 1) (match-string 2)))) | |
| 266 | (fprint (and (re-search-forward | |
| 267 | "^\\[GNUPG:\\] VALIDSIG \\([0-9a-zA-Z]*\\) " | |
| 268 | nil t) | |
| 269 | (match-string 1))) | |
| 270 | (trust (and (re-search-forward | |
| 271 | "^\\[GNUPG:\\] \\(TRUST_.*\\)$" | |
| 272 | nil t) | |
| 273 | (match-string 1))) | |
| 274 | (trust-good-enough-p | |
| 275 | (cdr (assoc trust mml2015-unabbrev-trust-alist)))) | |
| 276 | (cond ((and signer fprint) | |
| 277 | (concat (cdr signer) | |
| 278 | (unless trust-good-enough-p | |
| 279 | (concat "\nUntrusted, Fingerprint: " | |
| 280 | (mml2015-gpg-pretty-print-fpr fprint))) | |
| 281 | (when expired | |
| 282 | (format "\nWARNING: Signature from expired key (%s)" | |
| 283 | (car signer))))) | |
| 284 | ((re-search-forward | |
| 285 | "^\\(gpg: \\)?Good signature from \"\\(.*\\)\"$" nil t) | |
| 286 | (match-string 2)) | |
| 287 | (t | |
| 288 | "From unknown user")))) | |
| 289 | ||
| 23f87bed MB |
290 | (defun mml2015-mailcrypt-clear-decrypt () |
| 291 | (let (result) | |
| 292 | (setq result | |
| 293 | (condition-case err | |
| 294 | (funcall mml2015-decrypt-function) | |
| 295 | (error | |
| 296 | (mm-set-handle-multipart-parameter | |
| 297 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
| 298 | nil) | |
| 299 | (quit | |
| 300 | (mm-set-handle-multipart-parameter | |
| 301 | mm-security-handle 'gnus-details "Quit.") | |
| 302 | nil))) | |
| 303 | (if (car result) | |
| 304 | (mm-set-handle-multipart-parameter | |
| 305 | mm-security-handle 'gnus-info "OK") | |
| 306 | (mm-set-handle-multipart-parameter | |
| 307 | mm-security-handle 'gnus-info "Failed")))) | |
| 308 | ||
| 309 | (defun mml2015-fix-micalg (alg) | |
| 310 | (and alg | |
| 311 | ;; Mutt/1.2.5i has seen sending micalg=php-sha1 | |
| 312 | (upcase (if (string-match "^p[gh]p-" alg) | |
| 313 | (substring alg (match-end 0)) | |
| 314 | alg)))) | |
| 315 | ||
| 316 | (defun mml2015-mailcrypt-verify (handle ctl) | |
| 317 | (catch 'error | |
| 318 | (let (part) | |
| 319 | (unless (setq part (mm-find-raw-part-by-type | |
| 320 | ctl (or (mm-handle-multipart-ctl-parameter | |
| 321 | ctl 'protocol) | |
| 322 | "application/pgp-signature") | |
| 323 | t)) | |
| 324 | (mm-set-handle-multipart-parameter | |
| 325 | mm-security-handle 'gnus-info "Corrupted") | |
| 326 | (throw 'error handle)) | |
| 327 | (with-temp-buffer | |
| 328 | (insert "-----BEGIN PGP SIGNED MESSAGE-----\n") | |
| 329 | (insert (format "Hash: %s\n\n" | |
| 330 | (or (mml2015-fix-micalg | |
| 331 | (mm-handle-multipart-ctl-parameter | |
| 332 | ctl 'micalg)) | |
| 333 | "SHA1"))) | |
| 334 | (save-restriction | |
| 335 | (narrow-to-region (point) (point)) | |
| 336 | (insert part "\n") | |
| 337 | (goto-char (point-min)) | |
| 338 | (while (not (eobp)) | |
| 339 | (if (looking-at "^-") | |
| 340 | (insert "- ")) | |
| 341 | (forward-line))) | |
| 342 | (unless (setq part (mm-find-part-by-type | |
| 343 | (cdr handle) "application/pgp-signature" nil t)) | |
| 344 | (mm-set-handle-multipart-parameter | |
| 345 | mm-security-handle 'gnus-info "Corrupted") | |
| 346 | (throw 'error handle)) | |
| 347 | (save-restriction | |
| 348 | (narrow-to-region (point) (point)) | |
| 349 | (mm-insert-part part) | |
| 350 | (goto-char (point-min)) | |
| 351 | (if (re-search-forward "^-----BEGIN PGP [^-]+-----\r?$" nil t) | |
| 352 | (replace-match "-----BEGIN PGP SIGNATURE-----" t t)) | |
| 353 | (if (re-search-forward "^-----END PGP [^-]+-----\r?$" nil t) | |
| 354 | (replace-match "-----END PGP SIGNATURE-----" t t))) | |
| 355 | (let ((mc-gpg-debug-buffer (get-buffer-create " *gnus gpg debug*"))) | |
| 356 | (unless (condition-case err | |
| 357 | (prog1 | |
| 358 | (funcall mml2015-verify-function) | |
| 359 | (if (get-buffer " *mailcrypt stderr temp") | |
| 360 | (mm-set-handle-multipart-parameter | |
| 361 | mm-security-handle 'gnus-details | |
| 362 | (with-current-buffer " *mailcrypt stderr temp" | |
| 363 | (buffer-string)))) | |
| 364 | (if (get-buffer " *mailcrypt stdout temp") | |
| 365 | (kill-buffer " *mailcrypt stdout temp")) | |
| 366 | (if (get-buffer " *mailcrypt stderr temp") | |
| 367 | (kill-buffer " *mailcrypt stderr temp")) | |
| 368 | (if (get-buffer " *mailcrypt status temp") | |
| 369 | (kill-buffer " *mailcrypt status temp")) | |
| 370 | (if (get-buffer mc-gpg-debug-buffer) | |
| 371 | (kill-buffer mc-gpg-debug-buffer))) | |
| 372 | (error | |
| 373 | (mm-set-handle-multipart-parameter | |
| 374 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
| 375 | nil) | |
| 376 | (quit | |
| 377 | (mm-set-handle-multipart-parameter | |
| 378 | mm-security-handle 'gnus-details "Quit.") | |
| 379 | nil)) | |
| 380 | (mm-set-handle-multipart-parameter | |
| 381 | mm-security-handle 'gnus-info "Failed") | |
| 382 | (throw 'error handle)))) | |
| 383 | (mm-set-handle-multipart-parameter | |
| 384 | mm-security-handle 'gnus-info "OK") | |
| 385 | handle))) | |
| 386 | ||
| 387 | (defun mml2015-mailcrypt-clear-verify () | |
| 388 | (let ((mc-gpg-debug-buffer (get-buffer-create " *gnus gpg debug*"))) | |
| 389 | (if (condition-case err | |
| 390 | (prog1 | |
| 391 | (funcall mml2015-verify-function) | |
| 392 | (if (get-buffer " *mailcrypt stderr temp") | |
| 393 | (mm-set-handle-multipart-parameter | |
| 394 | mm-security-handle 'gnus-details | |
| 395 | (with-current-buffer " *mailcrypt stderr temp" | |
| 396 | (buffer-string)))) | |
| 397 | (if (get-buffer " *mailcrypt stdout temp") | |
| 398 | (kill-buffer " *mailcrypt stdout temp")) | |
| 399 | (if (get-buffer " *mailcrypt stderr temp") | |
| 400 | (kill-buffer " *mailcrypt stderr temp")) | |
| 401 | (if (get-buffer " *mailcrypt status temp") | |
| 402 | (kill-buffer " *mailcrypt status temp")) | |
| 403 | (if (get-buffer mc-gpg-debug-buffer) | |
| 404 | (kill-buffer mc-gpg-debug-buffer))) | |
| 405 | (error | |
| 406 | (mm-set-handle-multipart-parameter | |
| 407 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
| 408 | nil) | |
| 409 | (quit | |
| 410 | (mm-set-handle-multipart-parameter | |
| 411 | mm-security-handle 'gnus-details "Quit.") | |
| 412 | nil)) | |
| 413 | (mm-set-handle-multipart-parameter | |
| 414 | mm-security-handle 'gnus-info "OK") | |
| 415 | (mm-set-handle-multipart-parameter | |
| 01c52d31 MB |
416 | mm-security-handle 'gnus-info "Failed"))) |
| 417 | (mml2015-extract-cleartext-signature)) | |
| 23f87bed MB |
418 | |
| 419 | (defun mml2015-mailcrypt-sign (cont) | |
| 420 | (mc-sign-generic (message-options-get 'message-sender) | |
| 421 | nil nil nil nil) | |
| 422 | (let ((boundary (mml-compute-boundary cont)) | |
| 423 | hash point) | |
| 424 | (goto-char (point-min)) | |
| 425 | (unless (re-search-forward "^-----BEGIN PGP SIGNED MESSAGE-----\r?$" nil t) | |
| 426 | (error "Cannot find signed begin line")) | |
| 427 | (goto-char (match-beginning 0)) | |
| 428 | (forward-line 1) | |
| 429 | (unless (looking-at "Hash:[ \t]*\\([a-zA-Z0-9]+\\)") | |
| 430 | (error "Cannot not find PGP hash")) | |
| 431 | (setq hash (match-string 1)) | |
| 432 | (unless (re-search-forward "^$" nil t) | |
| 433 | (error "Cannot not find PGP message")) | |
| 434 | (forward-line 1) | |
| 435 | (delete-region (point-min) (point)) | |
| 436 | (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n" | |
| 437 | boundary)) | |
| 438 | (insert (format "\tmicalg=pgp-%s; protocol=\"application/pgp-signature\"\n" | |
| 439 | (downcase hash))) | |
| 440 | (insert (format "\n--%s\n" boundary)) | |
| 441 | (setq point (point)) | |
| 442 | (goto-char (point-max)) | |
| 443 | (unless (re-search-backward "^-----END PGP SIGNATURE-----\r?$" nil t) | |
| 444 | (error "Cannot find signature part")) | |
| 445 | (replace-match "-----END PGP MESSAGE-----" t t) | |
| 446 | (goto-char (match-beginning 0)) | |
| 447 | (unless (re-search-backward "^-----BEGIN PGP SIGNATURE-----\r?$" | |
| 448 | nil t) | |
| 449 | (error "Cannot find signature part")) | |
| 450 | (replace-match "-----BEGIN PGP MESSAGE-----" t t) | |
| 451 | (goto-char (match-beginning 0)) | |
| 452 | (save-restriction | |
| 453 | (narrow-to-region point (point)) | |
| 454 | (goto-char point) | |
| 455 | (while (re-search-forward "^- -" nil t) | |
| 456 | (replace-match "-" t t)) | |
| 457 | (goto-char (point-max))) | |
| 458 | (insert (format "--%s\n" boundary)) | |
| 459 | (insert "Content-Type: application/pgp-signature\n\n") | |
| 460 | (goto-char (point-max)) | |
| 461 | (insert (format "--%s--\n" boundary)) | |
| 462 | (goto-char (point-max)))) | |
| 463 | ||
| 5a12b40c GM |
464 | ;; We require mm-decode, which requires mm-bodies, which autoloads |
| 465 | ;; message-options-get (!). | |
| 466 | (declare-function message-options-set "message" (symbol value)) | |
| 467 | ||
| 23f87bed MB |
468 | (defun mml2015-mailcrypt-encrypt (cont &optional sign) |
| 469 | (let ((mc-pgp-always-sign | |
| 470 | (or mc-pgp-always-sign | |
| 471 | sign | |
| 472 | (eq t (or (message-options-get 'message-sign-encrypt) | |
| 473 | (message-options-set | |
| 474 | 'message-sign-encrypt | |
| 475 | (or (y-or-n-p "Sign the message? ") | |
| 476 | 'not)))) | |
| 477 | 'never))) | |
| 478 | (mm-with-unibyte-current-buffer | |
| 479 | (mc-encrypt-generic | |
| 480 | (or (message-options-get 'message-recipients) | |
| 481 | (message-options-set 'message-recipients | |
| 482 | (mc-cleanup-recipient-headers | |
| 483 | (read-string "Recipients: ")))) | |
| 484 | nil nil nil | |
| 485 | (message-options-get 'message-sender)))) | |
| 486 | (goto-char (point-min)) | |
| 487 | (unless (looking-at "-----BEGIN PGP MESSAGE-----") | |
| 488 | (error "Fail to encrypt the message")) | |
| 489 | (let ((boundary (mml-compute-boundary cont))) | |
| 490 | (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n" | |
| 491 | boundary)) | |
| 492 | (insert "\tprotocol=\"application/pgp-encrypted\"\n\n") | |
| 493 | (insert (format "--%s\n" boundary)) | |
| 494 | (insert "Content-Type: application/pgp-encrypted\n\n") | |
| 495 | (insert "Version: 1\n\n") | |
| 496 | (insert (format "--%s\n" boundary)) | |
| 497 | (insert "Content-Type: application/octet-stream\n\n") | |
| 498 | (goto-char (point-max)) | |
| 499 | (insert (format "--%s--\n" boundary)) | |
| 500 | (goto-char (point-max)))) | |
| 501 | ||
| 23f87bed MB |
502 | ;;; pgg wrapper |
| 503 | ||
| 9efa445f DN |
504 | (defvar pgg-default-user-id) |
| 505 | (defvar pgg-errors-buffer) | |
| 506 | (defvar pgg-output-buffer) | |
| 23f87bed | 507 | |
| 8abf1b22 GM |
508 | (autoload 'pgg-decrypt-region "pgg") |
| 509 | (autoload 'pgg-verify-region "pgg") | |
| 510 | (autoload 'pgg-sign-region "pgg") | |
| 511 | (autoload 'pgg-encrypt-region "pgg") | |
| 512 | (autoload 'pgg-parse-armor "pgg-parse") | |
| 23f87bed MB |
513 | |
| 514 | (defun mml2015-pgg-decrypt (handle ctl) | |
| 515 | (catch 'error | |
| 516 | (let ((pgg-errors-buffer mml2015-result-buffer) | |
| 517 | child handles result decrypt-status) | |
| 518 | (unless (setq child (mm-find-part-by-type | |
| 519 | (cdr handle) | |
| 520 | "application/octet-stream" nil t)) | |
| 521 | (mm-set-handle-multipart-parameter | |
| 522 | mm-security-handle 'gnus-info "Corrupted") | |
| 523 | (throw 'error handle)) | |
| 524 | (with-temp-buffer | |
| 525 | (mm-insert-part child) | |
| 526 | (if (condition-case err | |
| 527 | (prog1 | |
| 528 | (pgg-decrypt-region (point-min) (point-max)) | |
| bf247b6e | 529 | (setq decrypt-status |
| 23f87bed MB |
530 | (with-current-buffer mml2015-result-buffer |
| 531 | (buffer-string))) | |
| 532 | (mm-set-handle-multipart-parameter | |
| 533 | mm-security-handle 'gnus-details | |
| 534 | decrypt-status)) | |
| 535 | (error | |
| 536 | (mm-set-handle-multipart-parameter | |
| 537 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
| 538 | nil) | |
| 539 | (quit | |
| 540 | (mm-set-handle-multipart-parameter | |
| 541 | mm-security-handle 'gnus-details "Quit.") | |
| 542 | nil)) | |
| 543 | (with-current-buffer pgg-output-buffer | |
| 544 | (goto-char (point-min)) | |
| 545 | (while (search-forward "\r\n" nil t) | |
| 546 | (replace-match "\n" t t)) | |
| 547 | (setq handles (mm-dissect-buffer t)) | |
| 548 | (mm-destroy-parts handle) | |
| 549 | (mm-set-handle-multipart-parameter | |
| 550 | mm-security-handle 'gnus-info "OK") | |
| 551 | (mm-set-handle-multipart-parameter | |
| 552 | mm-security-handle 'gnus-details | |
| 553 | (concat decrypt-status | |
| 554 | (when (stringp (car handles)) | |
| 555 | "\n" (mm-handle-multipart-ctl-parameter | |
| 556 | handles 'gnus-details)))) | |
| 557 | (if (listp (car handles)) | |
| 558 | handles | |
| 559 | (list handles))) | |
| 560 | (mm-set-handle-multipart-parameter | |
| 561 | mm-security-handle 'gnus-info "Failed") | |
| 562 | (throw 'error handle)))))) | |
| 563 | ||
| 564 | (defun mml2015-pgg-clear-decrypt () | |
| 565 | (let ((pgg-errors-buffer mml2015-result-buffer)) | |
| 566 | (if (prog1 | |
| 567 | (pgg-decrypt-region (point-min) (point-max)) | |
| 568 | (mm-set-handle-multipart-parameter | |
| 569 | mm-security-handle 'gnus-details | |
| 570 | (with-current-buffer mml2015-result-buffer | |
| 571 | (buffer-string)))) | |
| 572 | (progn | |
| 573 | (erase-buffer) | |
| 9606f1cb MB |
574 | ;; Treat data which pgg returns as a unibyte string. |
| 575 | (mm-disable-multibyte) | |
| 23f87bed MB |
576 | (insert-buffer-substring pgg-output-buffer) |
| 577 | (goto-char (point-min)) | |
| 578 | (while (search-forward "\r\n" nil t) | |
| 579 | (replace-match "\n" t t)) | |
| 580 | (mm-set-handle-multipart-parameter | |
| 581 | mm-security-handle 'gnus-info "OK")) | |
| 582 | (mm-set-handle-multipart-parameter | |
| 583 | mm-security-handle 'gnus-info "Failed")))) | |
| 584 | ||
| 585 | (defun mml2015-pgg-verify (handle ctl) | |
| 586 | (let ((pgg-errors-buffer mml2015-result-buffer) | |
| 587 | signature-file part signature) | |
| 588 | (if (or (null (setq part (mm-find-raw-part-by-type | |
| 589 | ctl (or (mm-handle-multipart-ctl-parameter | |
| 590 | ctl 'protocol) | |
| 591 | "application/pgp-signature") | |
| 592 | t))) | |
| 593 | (null (setq signature (mm-find-part-by-type | |
| 594 | (cdr handle) "application/pgp-signature" nil t)))) | |
| 595 | (progn | |
| 596 | (mm-set-handle-multipart-parameter | |
| 597 | mm-security-handle 'gnus-info "Corrupted") | |
| 598 | handle) | |
| 599 | (with-temp-buffer | |
| 600 | (insert part) | |
| 01c52d31 MB |
601 | ;; Convert <LF> to <CR><LF> in signed text. If --textmode is |
| 602 | ;; specified when signing, the conversion is not necessary. | |
| 23f87bed MB |
603 | (goto-char (point-min)) |
| 604 | (end-of-line) | |
| 605 | (while (not (eobp)) | |
| 606 | (unless (eq (char-before) ?\r) | |
| 607 | (insert "\r")) | |
| 608 | (forward-line) | |
| 609 | (end-of-line)) | |
| 610 | (with-temp-file (setq signature-file (mm-make-temp-file "pgg")) | |
| 611 | (mm-insert-part signature)) | |
| 612 | (if (condition-case err | |
| 613 | (prog1 | |
| bf247b6e | 614 | (pgg-verify-region (point-min) (point-max) |
| 23f87bed MB |
615 | signature-file t) |
| 616 | (goto-char (point-min)) | |
| 617 | (while (search-forward "\r\n" nil t) | |
| 618 | (replace-match "\n" t t)) | |
| 619 | (mm-set-handle-multipart-parameter | |
| 620 | mm-security-handle 'gnus-details | |
| 621 | (concat (with-current-buffer pgg-output-buffer | |
| 622 | (buffer-string)) | |
| 623 | (with-current-buffer pgg-errors-buffer | |
| 624 | (buffer-string))))) | |
| 625 | (error | |
| 626 | (mm-set-handle-multipart-parameter | |
| 627 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
| 628 | nil) | |
| 629 | (quit | |
| 630 | (mm-set-handle-multipart-parameter | |
| 631 | mm-security-handle 'gnus-details "Quit.") | |
| 632 | nil)) | |
| 633 | (progn | |
| 634 | (delete-file signature-file) | |
| 635 | (mm-set-handle-multipart-parameter | |
| 636 | mm-security-handle 'gnus-info | |
| 637 | (with-current-buffer pgg-errors-buffer | |
| 638 | (mml2015-gpg-extract-signature-details)))) | |
| 639 | (delete-file signature-file) | |
| 640 | (mm-set-handle-multipart-parameter | |
| 641 | mm-security-handle 'gnus-info "Failed"))))) | |
| 642 | handle) | |
| 643 | ||
| 644 | (defun mml2015-pgg-clear-verify () | |
| 645 | (let ((pgg-errors-buffer mml2015-result-buffer) | |
| 646 | (text (buffer-string)) | |
| 647 | (coding-system buffer-file-coding-system)) | |
| 648 | (if (condition-case err | |
| 649 | (prog1 | |
| 650 | (mm-with-unibyte-buffer | |
| 5538c331 | 651 | (insert (mm-encode-coding-string text coding-system)) |
| 23f87bed MB |
652 | (pgg-verify-region (point-min) (point-max) nil t)) |
| 653 | (goto-char (point-min)) | |
| 654 | (while (search-forward "\r\n" nil t) | |
| 655 | (replace-match "\n" t t)) | |
| 656 | (mm-set-handle-multipart-parameter | |
| 657 | mm-security-handle 'gnus-details | |
| 658 | (concat (with-current-buffer pgg-output-buffer | |
| 659 | (buffer-string)) | |
| 660 | (with-current-buffer pgg-errors-buffer | |
| 661 | (buffer-string))))) | |
| 662 | (error | |
| 663 | (mm-set-handle-multipart-parameter | |
| 664 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
| 665 | nil) | |
| 666 | (quit | |
| 667 | (mm-set-handle-multipart-parameter | |
| 668 | mm-security-handle 'gnus-details "Quit.") | |
| 669 | nil)) | |
| 670 | (mm-set-handle-multipart-parameter | |
| 671 | mm-security-handle 'gnus-info | |
| 672 | (with-current-buffer pgg-errors-buffer | |
| 673 | (mml2015-gpg-extract-signature-details))) | |
| 674 | (mm-set-handle-multipart-parameter | |
| 01c52d31 MB |
675 | mm-security-handle 'gnus-info "Failed"))) |
| 676 | (mml2015-extract-cleartext-signature)) | |
| 23f87bed MB |
677 | |
| 678 | (defun mml2015-pgg-sign (cont) | |
| 679 | (let ((pgg-errors-buffer mml2015-result-buffer) | |
| 680 | (boundary (mml-compute-boundary cont)) | |
| 681 | (pgg-default-user-id (or (message-options-get 'mml-sender) | |
| bcc7dd61 | 682 | pgg-default-user-id)) |
| 34128042 | 683 | (pgg-text-mode t) |
| bcc7dd61 | 684 | entry) |
| 23f87bed MB |
685 | (unless (pgg-sign-region (point-min) (point-max)) |
| 686 | (pop-to-buffer mml2015-result-buffer) | |
| 687 | (error "Sign error")) | |
| 688 | (goto-char (point-min)) | |
| 689 | (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n" | |
| 690 | boundary)) | |
| bcc7dd61 MB |
691 | (if (setq entry (assq 2 (pgg-parse-armor |
| 692 | (with-current-buffer pgg-output-buffer | |
| 693 | (buffer-string))))) | |
| 694 | (setq entry (assq 'hash-algorithm (cdr entry)))) | |
| 695 | (insert (format "\tmicalg=%s; " | |
| 696 | (if (cdr entry) | |
| 697 | (downcase (format "pgp-%s" (cdr entry))) | |
| 698 | "pgp-sha1"))) | |
| 699 | (insert "protocol=\"application/pgp-signature\"\n") | |
| 23f87bed MB |
700 | (insert (format "\n--%s\n" boundary)) |
| 701 | (goto-char (point-max)) | |
| 702 | (insert (format "\n--%s\n" boundary)) | |
| 703 | (insert "Content-Type: application/pgp-signature\n\n") | |
| 704 | (insert-buffer-substring pgg-output-buffer) | |
| 705 | (goto-char (point-max)) | |
| 706 | (insert (format "--%s--\n" boundary)) | |
| 707 | (goto-char (point-max)))) | |
| 708 | ||
| 709 | (defun mml2015-pgg-encrypt (cont &optional sign) | |
| 710 | (let ((pgg-errors-buffer mml2015-result-buffer) | |
| 34128042 | 711 | (pgg-text-mode t) |
| 23f87bed MB |
712 | (boundary (mml-compute-boundary cont))) |
| 713 | (unless (pgg-encrypt-region (point-min) (point-max) | |
| 714 | (split-string | |
| 715 | (or | |
| 716 | (message-options-get 'message-recipients) | |
| 717 | (message-options-set 'message-recipients | |
| 718 | (read-string "Recipients: "))) | |
| 719 | "[ \f\t\n\r\v,]+") | |
| 720 | sign) | |
| 721 | (pop-to-buffer mml2015-result-buffer) | |
| 722 | (error "Encrypt error")) | |
| 723 | (delete-region (point-min) (point-max)) | |
| 724 | (goto-char (point-min)) | |
| 725 | (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n" | |
| 726 | boundary)) | |
| 727 | (insert "\tprotocol=\"application/pgp-encrypted\"\n\n") | |
| 728 | (insert (format "--%s\n" boundary)) | |
| 729 | (insert "Content-Type: application/pgp-encrypted\n\n") | |
| 730 | (insert "Version: 1\n\n") | |
| 731 | (insert (format "--%s\n" boundary)) | |
| 732 | (insert "Content-Type: application/octet-stream\n\n") | |
| 733 | (insert-buffer-substring pgg-output-buffer) | |
| 734 | (goto-char (point-max)) | |
| 735 | (insert (format "--%s--\n" boundary)) | |
| 736 | (goto-char (point-max)))) | |
| 737 | ||
| 01c52d31 MB |
738 | ;;; epg wrapper |
| 739 | ||
| 9efa445f DN |
740 | (defvar epg-user-id-alist) |
| 741 | (defvar epg-digest-algorithm-alist) | |
| f1c9aabc | 742 | (defvar epg-gpg-program) |
| 9efa445f | 743 | (defvar inhibit-redisplay) |
| 01c52d31 | 744 | |
| 8abf1b22 GM |
745 | (autoload 'epg-make-context "epg") |
| 746 | (autoload 'epg-context-set-armor "epg") | |
| 747 | (autoload 'epg-context-set-textmode "epg") | |
| 748 | (autoload 'epg-context-set-signers "epg") | |
| 749 | (autoload 'epg-context-result-for "epg") | |
| 750 | (autoload 'epg-new-signature-digest-algorithm "epg") | |
| 8abf1b22 GM |
751 | (autoload 'epg-list-keys "epg") |
| 752 | (autoload 'epg-decrypt-string "epg") | |
| 753 | (autoload 'epg-verify-string "epg") | |
| 754 | (autoload 'epg-sign-string "epg") | |
| 755 | (autoload 'epg-encrypt-string "epg") | |
| 756 | (autoload 'epg-passphrase-callback-function "epg") | |
| 757 | (autoload 'epg-context-set-passphrase-callback "epg") | |
| 758 | (autoload 'epg-key-sub-key-list "epg") | |
| 759 | (autoload 'epg-sub-key-capability "epg") | |
| 760 | (autoload 'epg-sub-key-validity "epg") | |
| ad09474a | 761 | (autoload 'epg-sub-key-fingerprint "epg") |
| f1c9aabc DU |
762 | (autoload 'epg-signature-key-id "epg") |
| 763 | (autoload 'epg-signature-to-string "epg") | |
| a8010075 DU |
764 | (autoload 'epg-key-user-id-list "epg") |
| 765 | (autoload 'epg-user-id-string "epg") | |
| 766 | (autoload 'epg-user-id-validity "epg") | |
| 8abf1b22 GM |
767 | (autoload 'epg-configuration "epg-config") |
| 768 | (autoload 'epg-expand-group "epg-config") | |
| 769 | (autoload 'epa-select-keys "epa") | |
| 01c52d31 | 770 | |
| 01c52d31 MB |
771 | (defvar mml2015-epg-secret-key-id-list nil) |
| 772 | ||
| 773 | (defun mml2015-epg-passphrase-callback (context key-id ignore) | |
| 774 | (if (eq key-id 'SYM) | |
| 775 | (epg-passphrase-callback-function context key-id nil) | |
| 9b3ebcb6 MB |
776 | (let* ((password-cache-key-id |
| 777 | (if (eq key-id 'PIN) | |
| 778 | "PIN" | |
| 779 | key-id)) | |
| 780 | entry | |
| 01c52d31 MB |
781 | (passphrase |
| 782 | (password-read | |
| 783 | (if (eq key-id 'PIN) | |
| 784 | "Passphrase for PIN: " | |
| 785 | (if (setq entry (assoc key-id epg-user-id-alist)) | |
| 786 | (format "Passphrase for %s %s: " key-id (cdr entry)) | |
| 787 | (format "Passphrase for %s: " key-id))) | |
| 9b3ebcb6 | 788 | password-cache-key-id))) |
| 01c52d31 MB |
789 | (when passphrase |
| 790 | (let ((password-cache-expiry mml2015-passphrase-cache-expiry)) | |
| 9b3ebcb6 | 791 | (password-cache-add password-cache-key-id passphrase)) |
| 01c52d31 | 792 | (setq mml2015-epg-secret-key-id-list |
| 9b3ebcb6 | 793 | (cons password-cache-key-id mml2015-epg-secret-key-id-list)) |
| 01c52d31 MB |
794 | (copy-sequence passphrase))))) |
| 795 | ||
| a8010075 DU |
796 | (defun mml2015-epg-check-user-id (key recipient) |
| 797 | (let ((pointer (epg-key-user-id-list key)) | |
| 798 | result) | |
| 799 | (while pointer | |
| 800 | (if (and (equal (car (mail-header-parse-address | |
| 801 | (epg-user-id-string (car pointer)))) | |
| 802 | (car (mail-header-parse-address | |
| 803 | recipient))) | |
| 804 | (not (memq (epg-user-id-validity (car pointer)) | |
| 805 | '(revoked expired)))) | |
| 806 | (setq result t | |
| 807 | pointer nil) | |
| 808 | (setq pointer (cdr pointer)))) | |
| 809 | result)) | |
| 810 | ||
| 811 | (defun mml2015-epg-check-sub-key (key usage) | |
| 812 | (let ((pointer (epg-key-sub-key-list key)) | |
| 813 | result) | |
| 814 | ;; The primary key will be marked as disabled, when the entire | |
| 815 | ;; key is disabled (see 12 Field, Format of colon listings, in | |
| 816 | ;; gnupg/doc/DETAILS) | |
| 817 | (unless (memq 'disabled (epg-sub-key-capability (car pointer))) | |
| 818 | (while pointer | |
| 819 | (if (and (memq usage (epg-sub-key-capability (car pointer))) | |
| 820 | (not (memq (epg-sub-key-validity (car pointer)) | |
| 821 | '(revoked expired)))) | |
| 822 | (setq result t | |
| 823 | pointer nil) | |
| 824 | (setq pointer (cdr pointer))))) | |
| 825 | result)) | |
| 826 | ||
| 827 | (defun mml2015-epg-find-usable-key (context name usage | |
| 828 | &optional name-is-key-id) | |
| 829 | (let ((keys (epg-list-keys context name)) | |
| 830 | key) | |
| 01c52d31 | 831 | (while keys |
| a8010075 DU |
832 | (if (and (or name-is-key-id |
| 833 | ;; Non email user-id can be supplied through | |
| 834 | ;; mml2015-signers if mml2015-encrypt-to-self is set. | |
| 835 | ;; Treat it as valid, as it is user's intention. | |
| 836 | (not (string-match "\\`<" name)) | |
| 837 | (mml2015-epg-check-user-id (car keys) name)) | |
| 838 | (mml2015-epg-check-sub-key (car keys) usage)) | |
| 839 | (setq key (car keys) | |
| 840 | keys nil) | |
| 841 | (setq keys (cdr keys)))) | |
| 842 | key)) | |
| 01c52d31 | 843 | |
| ad09474a DU |
844 | ;; XXX: since gpg --list-secret-keys does not return validity of each |
| 845 | ;; key, `mml2015-epg-find-usable-key' defined above is not enough for | |
| 846 | ;; secret keys. The function `mml2015-epg-find-usable-secret-key' | |
| 847 | ;; below looks at appropriate public keys to check usability. | |
| 848 | (defun mml2015-epg-find-usable-secret-key (context name usage) | |
| 849 | (let ((secret-keys (epg-list-keys context name t)) | |
| 850 | secret-key) | |
| 851 | (while (and (not secret-key) secret-keys) | |
| 852 | (if (mml2015-epg-find-usable-key | |
| a8010075 DU |
853 | context |
| 854 | (epg-sub-key-fingerprint | |
| 855 | (car (epg-key-sub-key-list | |
| 856 | (car secret-keys)))) | |
| 857 | usage | |
| 858 | t) | |
| ad09474a DU |
859 | (setq secret-key (car secret-keys) |
| 860 | secret-keys nil) | |
| 861 | (setq secret-keys (cdr secret-keys)))) | |
| 862 | secret-key)) | |
| 863 | ||
| 413f9061 GM |
864 | (autoload 'gnus-create-image "gnus-ems") |
| 865 | ||
| f1c9aabc DU |
866 | (defun mml2015-epg-key-image (key-id) |
| 867 | "Return the image of a key, if any" | |
| da42d41a G |
868 | (with-temp-buffer |
| 869 | (mm-set-buffer-multibyte nil) | |
| 870 | (let* ((coding-system-for-write 'binary) | |
| 871 | (coding-system-for-read 'binary) | |
| 872 | (data (shell-command-to-string | |
| 541aff54 | 873 | (format "%s --list-options no-show-photos --attribute-fd 3 --list-keys %s 3>&1 >/dev/null 2>&1" |
| d9bb0d48 | 874 | (shell-quote-argument epg-gpg-program) key-id)))) |
| da42d41a G |
875 | (when (> (length data) 0) |
| 876 | (insert (substring data 16)) | |
| bb70a65f DU |
877 | (condition-case nil |
| 878 | (gnus-create-image (buffer-string) nil t) | |
| 879 | (error)))))) | |
| f1c9aabc | 880 | |
| 0583b686 DE |
881 | (autoload 'gnus-rescale-image "gnus-util") |
| 882 | ||
| f1c9aabc DU |
883 | (defun mml2015-epg-key-image-to-string (key-id) |
| 884 | "Return a string with the image of a key, if any" | |
| 89cccc2f G |
885 | (let ((key-image (mml2015-epg-key-image key-id))) |
| 886 | (if (not key-image) | |
| 887 | "" | |
| 888 | (condition-case error | |
| 889 | (let ((result " ")) | |
| 890 | (put-text-property | |
| 891 | 1 2 'display | |
| 892 | (gnus-rescale-image key-image | |
| 893 | (cons mml2015-maximum-key-image-dimension | |
| 894 | mml2015-maximum-key-image-dimension)) | |
| 895 | result) | |
| 896 | result) | |
| 897 | (error ""))))) | |
| f1c9aabc DU |
898 | |
| 899 | (defun mml2015-epg-signature-to-string (signature) | |
| 900 | (concat (epg-signature-to-string signature) | |
| 901 | (mml2015-epg-key-image-to-string (epg-signature-key-id signature)))) | |
| 902 | ||
| 903 | (defun mml2015-epg-verify-result-to-string (verify-result) | |
| 904 | (mapconcat #'mml2015-epg-signature-to-string verify-result "\n")) | |
| 905 | ||
| 01c52d31 MB |
906 | (defun mml2015-epg-decrypt (handle ctl) |
| 907 | (catch 'error | |
| 908 | (let ((inhibit-redisplay t) | |
| 909 | context plain child handles result decrypt-status) | |
| 910 | (unless (setq child (mm-find-part-by-type | |
| 911 | (cdr handle) | |
| 912 | "application/octet-stream" nil t)) | |
| 913 | (mm-set-handle-multipart-parameter | |
| 914 | mm-security-handle 'gnus-info "Corrupted") | |
| 915 | (throw 'error handle)) | |
| 916 | (setq context (epg-make-context)) | |
| 917 | (if mml2015-cache-passphrase | |
| 918 | (epg-context-set-passphrase-callback | |
| 919 | context | |
| 920 | #'mml2015-epg-passphrase-callback)) | |
| 921 | (condition-case error | |
| 922 | (setq plain (epg-decrypt-string context (mm-get-part child)) | |
| 923 | mml2015-epg-secret-key-id-list nil) | |
| 924 | (error | |
| 925 | (while mml2015-epg-secret-key-id-list | |
| 926 | (password-cache-remove (car mml2015-epg-secret-key-id-list)) | |
| 927 | (setq mml2015-epg-secret-key-id-list | |
| 928 | (cdr mml2015-epg-secret-key-id-list))) | |
| 929 | (mm-set-handle-multipart-parameter | |
| 930 | mm-security-handle 'gnus-info "Failed") | |
| 931 | (if (eq (car error) 'quit) | |
| 932 | (mm-set-handle-multipart-parameter | |
| 933 | mm-security-handle 'gnus-details "Quit.") | |
| 934 | (mm-set-handle-multipart-parameter | |
| 935 | mm-security-handle 'gnus-details (mml2015-format-error error))) | |
| 936 | (throw 'error handle))) | |
| 937 | (with-temp-buffer | |
| 938 | (insert plain) | |
| 939 | (goto-char (point-min)) | |
| 940 | (while (search-forward "\r\n" nil t) | |
| 941 | (replace-match "\n" t t)) | |
| 942 | (setq handles (mm-dissect-buffer t)) | |
| 943 | (mm-destroy-parts handle) | |
| 944 | (if (epg-context-result-for context 'verify) | |
| 945 | (mm-set-handle-multipart-parameter | |
| 946 | mm-security-handle 'gnus-info | |
| 947 | (concat "OK\n" | |
| f1c9aabc | 948 | (mml2015-epg-verify-result-to-string |
| 01c52d31 MB |
949 | (epg-context-result-for context 'verify)))) |
| 950 | (mm-set-handle-multipart-parameter | |
| 951 | mm-security-handle 'gnus-info "OK")) | |
| 952 | (if (stringp (car handles)) | |
| 953 | (mm-set-handle-multipart-parameter | |
| 954 | mm-security-handle 'gnus-details | |
| 955 | (mm-handle-multipart-ctl-parameter handles 'gnus-details)))) | |
| 956 | (if (listp (car handles)) | |
| 957 | handles | |
| 958 | (list handles))))) | |
| 959 | ||
| 960 | (defun mml2015-epg-clear-decrypt () | |
| 961 | (let ((inhibit-redisplay t) | |
| 962 | (context (epg-make-context)) | |
| 963 | plain) | |
| 964 | (if mml2015-cache-passphrase | |
| 965 | (epg-context-set-passphrase-callback | |
| 966 | context | |
| 967 | #'mml2015-epg-passphrase-callback)) | |
| 968 | (condition-case error | |
| 969 | (setq plain (epg-decrypt-string context (buffer-string)) | |
| 970 | mml2015-epg-secret-key-id-list nil) | |
| 971 | (error | |
| 972 | (while mml2015-epg-secret-key-id-list | |
| 973 | (password-cache-remove (car mml2015-epg-secret-key-id-list)) | |
| 974 | (setq mml2015-epg-secret-key-id-list | |
| 975 | (cdr mml2015-epg-secret-key-id-list))) | |
| 976 | (mm-set-handle-multipart-parameter | |
| 977 | mm-security-handle 'gnus-info "Failed") | |
| 978 | (if (eq (car error) 'quit) | |
| 979 | (mm-set-handle-multipart-parameter | |
| 980 | mm-security-handle 'gnus-details "Quit.") | |
| 981 | (mm-set-handle-multipart-parameter | |
| 982 | mm-security-handle 'gnus-details (mml2015-format-error error))))) | |
| 983 | (when plain | |
| 984 | (erase-buffer) | |
| 985 | ;; Treat data which epg returns as a unibyte string. | |
| 986 | (mm-disable-multibyte) | |
| 987 | (insert plain) | |
| 988 | (goto-char (point-min)) | |
| 989 | (while (search-forward "\r\n" nil t) | |
| 990 | (replace-match "\n" t t)) | |
| 991 | (mm-set-handle-multipart-parameter | |
| 992 | mm-security-handle 'gnus-info "OK") | |
| 993 | (if (epg-context-result-for context 'verify) | |
| 994 | (mm-set-handle-multipart-parameter | |
| 995 | mm-security-handle 'gnus-details | |
| f1c9aabc | 996 | (mml2015-epg-verify-result-to-string |
| 01c52d31 MB |
997 | (epg-context-result-for context 'verify))))))) |
| 998 | ||
| 999 | (defun mml2015-epg-verify (handle ctl) | |
| 1000 | (catch 'error | |
| 1001 | (let ((inhibit-redisplay t) | |
| 1002 | context plain signature-file part signature) | |
| 1003 | (when (or (null (setq part (mm-find-raw-part-by-type | |
| 1004 | ctl (or (mm-handle-multipart-ctl-parameter | |
| 1005 | ctl 'protocol) | |
| 1006 | "application/pgp-signature") | |
| 1007 | t))) | |
| 1008 | (null (setq signature (mm-find-part-by-type | |
| 1009 | (cdr handle) "application/pgp-signature" | |
| 1010 | nil t)))) | |
| 1011 | (mm-set-handle-multipart-parameter | |
| 1012 | mm-security-handle 'gnus-info "Corrupted") | |
| 1013 | (throw 'error handle)) | |
| 0f3de88f | 1014 | (setq part (mm-replace-in-string part "\n" "\r\n") |
| 01c52d31 MB |
1015 | signature (mm-get-part signature) |
| 1016 | context (epg-make-context)) | |
| 1017 | (condition-case error | |
| 1018 | (setq plain (epg-verify-string context signature part)) | |
| 1019 | (error | |
| 1020 | (mm-set-handle-multipart-parameter | |
| 1021 | mm-security-handle 'gnus-info "Failed") | |
| 1022 | (if (eq (car error) 'quit) | |
| 1023 | (mm-set-handle-multipart-parameter | |
| 1024 | mm-security-handle 'gnus-details "Quit.") | |
| 1025 | (mm-set-handle-multipart-parameter | |
| 1026 | mm-security-handle 'gnus-details (mml2015-format-error error))) | |
| 1027 | (throw 'error handle))) | |
| 1028 | (mm-set-handle-multipart-parameter | |
| 1029 | mm-security-handle 'gnus-info | |
| f1c9aabc DU |
1030 | (mml2015-epg-verify-result-to-string |
| 1031 | (epg-context-result-for context 'verify))) | |
| 01c52d31 MB |
1032 | handle))) |
| 1033 | ||
| 1034 | (defun mml2015-epg-clear-verify () | |
| 1035 | (let ((inhibit-redisplay t) | |
| 1036 | (context (epg-make-context)) | |
| 1037 | (signature (mm-encode-coding-string (buffer-string) | |
| 1038 | coding-system-for-write)) | |
| 1039 | plain) | |
| 1040 | (condition-case error | |
| 1041 | (setq plain (epg-verify-string context signature)) | |
| 1042 | (error | |
| 1043 | (mm-set-handle-multipart-parameter | |
| 1044 | mm-security-handle 'gnus-info "Failed") | |
| 1045 | (if (eq (car error) 'quit) | |
| 1046 | (mm-set-handle-multipart-parameter | |
| 1047 | mm-security-handle 'gnus-details "Quit.") | |
| 1048 | (mm-set-handle-multipart-parameter | |
| 1049 | mm-security-handle 'gnus-details (mml2015-format-error error))))) | |
| 1050 | (if plain | |
| 1051 | (progn | |
| 1052 | (mm-set-handle-multipart-parameter | |
| 1053 | mm-security-handle 'gnus-info | |
| f1c9aabc | 1054 | (mml2015-epg-verify-result-to-string |
| 01c52d31 MB |
1055 | (epg-context-result-for context 'verify))) |
| 1056 | (delete-region (point-min) (point-max)) | |
| 1057 | (insert (mm-decode-coding-string plain coding-system-for-read))) | |
| 1058 | (mml2015-extract-cleartext-signature)))) | |
| 1059 | ||
| 1060 | (defun mml2015-epg-sign (cont) | |
| 1061 | (let* ((inhibit-redisplay t) | |
| 1062 | (context (epg-make-context)) | |
| 1063 | (boundary (mml-compute-boundary cont)) | |
| bb760c5d DU |
1064 | (sender (message-options-get 'message-sender)) |
| 1065 | (signer-names (or mml2015-signers | |
| 1066 | (if (and mml2015-sign-with-sender sender) | |
| 1067 | (list (concat "<" sender ">"))))) | |
| 01c52d31 MB |
1068 | signer-key |
| 1069 | (signers | |
| 1070 | (or (message-options-get 'mml2015-epg-signers) | |
| 1071 | (message-options-set | |
| 1072 | 'mml2015-epg-signers | |
| 54c72c31 | 1073 | (if (eq mm-sign-option 'guided) |
| 01c52d31 MB |
1074 | (epa-select-keys context "\ |
| 1075 | Select keys for signing. | |
| 1076 | If no one is selected, default secret key is used. " | |
| bb760c5d | 1077 | signer-names |
| fdee7cc1 | 1078 | t) |
| 809fde05 | 1079 | (if (or sender mml2015-signers) |
| 52bec650 MB |
1080 | (delq nil |
| 1081 | (mapcar | |
| 1082 | (lambda (signer) | |
| ad09474a DU |
1083 | (setq signer-key |
| 1084 | (mml2015-epg-find-usable-secret-key | |
| 1085 | context signer 'sign)) | |
| 52bec650 MB |
1086 | (unless (or signer-key |
| 1087 | (y-or-n-p | |
| 1088 | (format | |
| 1089 | "No secret key for %s; skip it? " | |
| 1090 | signer))) | |
| 1091 | (error "No secret key for %s" signer)) | |
| 1092 | signer-key) | |
| bb760c5d | 1093 | signer-names))))))) |
| 01c52d31 MB |
1094 | signature micalg) |
| 1095 | (epg-context-set-armor context t) | |
| 1096 | (epg-context-set-textmode context t) | |
| 1097 | (epg-context-set-signers context signers) | |
| 1098 | (if mml2015-cache-passphrase | |
| 1099 | (epg-context-set-passphrase-callback | |
| 1100 | context | |
| 1101 | #'mml2015-epg-passphrase-callback)) | |
| a4e7e8ae DU |
1102 | ;; Signed data must end with a newline (RFC 3156, 5). |
| 1103 | (goto-char (point-max)) | |
| 1104 | (unless (bolp) | |
| 1105 | (insert "\n")) | |
| 01c52d31 MB |
1106 | (condition-case error |
| 1107 | (setq signature (epg-sign-string context (buffer-string) t) | |
| 1108 | mml2015-epg-secret-key-id-list nil) | |
| 1109 | (error | |
| 1110 | (while mml2015-epg-secret-key-id-list | |
| 1111 | (password-cache-remove (car mml2015-epg-secret-key-id-list)) | |
| 1112 | (setq mml2015-epg-secret-key-id-list | |
| 1113 | (cdr mml2015-epg-secret-key-id-list))) | |
| 1114 | (signal (car error) (cdr error)))) | |
| 1115 | (if (epg-context-result-for context 'sign) | |
| 1116 | (setq micalg (epg-new-signature-digest-algorithm | |
| 1117 | (car (epg-context-result-for context 'sign))))) | |
| 1118 | (goto-char (point-min)) | |
| 1119 | (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n" | |
| 1120 | boundary)) | |
| 1121 | (if micalg | |
| 1122 | (insert (format "\tmicalg=pgp-%s; " | |
| 1123 | (downcase | |
| 1124 | (cdr (assq micalg | |
| 1125 | epg-digest-algorithm-alist)))))) | |
| 1126 | (insert "protocol=\"application/pgp-signature\"\n") | |
| 1127 | (insert (format "\n--%s\n" boundary)) | |
| 1128 | (goto-char (point-max)) | |
| 1129 | (insert (format "\n--%s\n" boundary)) | |
| 7b92bf98 | 1130 | (insert "Content-Type: application/pgp-signature; name=\"signature.asc\"\n\n") |
| 01c52d31 MB |
1131 | (insert signature) |
| 1132 | (goto-char (point-max)) | |
| 1133 | (insert (format "--%s--\n" boundary)) | |
| 1134 | (goto-char (point-max)))) | |
| 1135 | ||
| 1136 | (defun mml2015-epg-encrypt (cont &optional sign) | |
| bb760c5d DU |
1137 | (let* ((inhibit-redisplay t) |
| 1138 | (context (epg-make-context)) | |
| 1139 | (boundary (mml-compute-boundary cont)) | |
| 1140 | (config (epg-configuration)) | |
| 1141 | (recipients (message-options-get 'mml2015-epg-recipients)) | |
| 1142 | cipher | |
| 1143 | (sender (message-options-get 'message-sender)) | |
| 1144 | (signer-names (or mml2015-signers | |
| 1145 | (if (and mml2015-sign-with-sender sender) | |
| 1146 | (list (concat "<" sender ">"))))) | |
| 1147 | signers | |
| 1148 | recipient-key signer-key) | |
| 01c52d31 MB |
1149 | (unless recipients |
| 1150 | (setq recipients | |
| 1151 | (apply #'nconc | |
| 1152 | (mapcar | |
| 1153 | (lambda (recipient) | |
| 1154 | (or (epg-expand-group config recipient) | |
| 1155 | (list (concat "<" recipient ">")))) | |
| 1156 | (split-string | |
| 1157 | (or (message-options-get 'message-recipients) | |
| 1158 | (message-options-set 'message-recipients | |
| 1159 | (read-string "Recipients: "))) | |
| 1160 | "[ \f\t\n\r\v,]+")))) | |
| 1161 | (when mml2015-encrypt-to-self | |
| bb760c5d DU |
1162 | (unless signer-names |
| 1163 | (error "Neither message sender nor mml2015-signers are set")) | |
| 1164 | (setq recipients (nconc recipients signer-names))) | |
| 54c72c31 | 1165 | (if (eq mm-encrypt-option 'guided) |
| 01c52d31 MB |
1166 | (setq recipients |
| 1167 | (epa-select-keys context "\ | |
| 1168 | Select recipients for encryption. | |
| 1169 | If no one is selected, symmetric encryption will be performed. " | |
| 1170 | recipients)) | |
| 1171 | (setq recipients | |
| 52bec650 MB |
1172 | (delq nil |
| 1173 | (mapcar | |
| 1174 | (lambda (recipient) | |
| 1175 | (setq recipient-key (mml2015-epg-find-usable-key | |
| a8010075 | 1176 | context recipient 'encrypt)) |
| 52bec650 MB |
1177 | (unless (or recipient-key |
| 1178 | (y-or-n-p | |
| 1179 | (format "No public key for %s; skip it? " | |
| 1180 | recipient))) | |
| 1181 | (error "No public key for %s" recipient)) | |
| 1182 | recipient-key) | |
| 1183 | recipients))) | |
| 01c52d31 MB |
1184 | (unless recipients |
| 1185 | (error "No recipient specified"))) | |
| 1186 | (message-options-set 'mml2015-epg-recipients recipients)) | |
| 1187 | (when sign | |
| 1188 | (setq signers | |
| 1189 | (or (message-options-get 'mml2015-epg-signers) | |
| 1190 | (message-options-set | |
| 1191 | 'mml2015-epg-signers | |
| 54c72c31 | 1192 | (if (eq mm-sign-option 'guided) |
| 01c52d31 MB |
1193 | (epa-select-keys context "\ |
| 1194 | Select keys for signing. | |
| 1195 | If no one is selected, default secret key is used. " | |
| bb760c5d | 1196 | signer-names |
| fdee7cc1 | 1197 | t) |
| 809fde05 | 1198 | (if (or sender mml2015-signers) |
| 52bec650 MB |
1199 | (delq nil |
| 1200 | (mapcar | |
| 1201 | (lambda (signer) | |
| ad09474a DU |
1202 | (setq signer-key |
| 1203 | (mml2015-epg-find-usable-secret-key | |
| 1204 | context signer 'sign)) | |
| 52bec650 MB |
1205 | (unless (or signer-key |
| 1206 | (y-or-n-p | |
| 1207 | (format | |
| 1208 | "No secret key for %s; skip it? " | |
| 1209 | signer))) | |
| 1210 | (error "No secret key for %s" signer)) | |
| 1211 | signer-key) | |
| bb760c5d | 1212 | signer-names))))))) |
| 01c52d31 MB |
1213 | (epg-context-set-signers context signers)) |
| 1214 | (epg-context-set-armor context t) | |
| 1215 | (epg-context-set-textmode context t) | |
| 1216 | (if mml2015-cache-passphrase | |
| 1217 | (epg-context-set-passphrase-callback | |
| 1218 | context | |
| 1219 | #'mml2015-epg-passphrase-callback)) | |
| 1220 | (condition-case error | |
| 1221 | (setq cipher | |
| 1222 | (epg-encrypt-string context (buffer-string) recipients sign | |
| 1223 | mml2015-always-trust) | |
| 1224 | mml2015-epg-secret-key-id-list nil) | |
| 1225 | (error | |
| 1226 | (while mml2015-epg-secret-key-id-list | |
| 1227 | (password-cache-remove (car mml2015-epg-secret-key-id-list)) | |
| 1228 | (setq mml2015-epg-secret-key-id-list | |
| 1229 | (cdr mml2015-epg-secret-key-id-list))) | |
| 1230 | (signal (car error) (cdr error)))) | |
| 1231 | (delete-region (point-min) (point-max)) | |
| 1232 | (goto-char (point-min)) | |
| 1233 | (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n" | |
| 1234 | boundary)) | |
| 1235 | (insert "\tprotocol=\"application/pgp-encrypted\"\n\n") | |
| 1236 | (insert (format "--%s\n" boundary)) | |
| 1237 | (insert "Content-Type: application/pgp-encrypted\n\n") | |
| 1238 | (insert "Version: 1\n\n") | |
| 1239 | (insert (format "--%s\n" boundary)) | |
| 1240 | (insert "Content-Type: application/octet-stream\n\n") | |
| 1241 | (insert cipher) | |
| 1242 | (goto-char (point-max)) | |
| 1243 | (insert (format "--%s--\n" boundary)) | |
| 1244 | (goto-char (point-max)))) | |
| 1245 | ||
| 23f87bed MB |
1246 | ;;; General wrapper |
| 1247 | ||
| 5a12b40c GM |
1248 | (autoload 'gnus-buffer-live-p "gnus-util") |
| 1249 | (autoload 'gnus-get-buffer-create "gnus") | |
| 1250 | ||
| 23f87bed MB |
1251 | (defun mml2015-clean-buffer () |
| 1252 | (if (gnus-buffer-live-p mml2015-result-buffer) | |
| 1253 | (with-current-buffer mml2015-result-buffer | |
| 1254 | (erase-buffer) | |
| 1255 | t) | |
| 1256 | (setq mml2015-result-buffer | |
| 01c52d31 | 1257 | (gnus-get-buffer-create " *MML2015 Result*")) |
| 23f87bed MB |
1258 | nil)) |
| 1259 | ||
| 1260 | (defsubst mml2015-clear-decrypt-function () | |
| 1261 | (nth 6 (assq mml2015-use mml2015-function-alist))) | |
| 1262 | ||
| 1263 | (defsubst mml2015-clear-verify-function () | |
| 1264 | (nth 5 (assq mml2015-use mml2015-function-alist))) | |
| 1265 | ||
| 1266 | ;;;###autoload | |
| 1267 | (defun mml2015-decrypt (handle ctl) | |
| 1268 | (mml2015-clean-buffer) | |
| 1269 | (let ((func (nth 4 (assq mml2015-use mml2015-function-alist)))) | |
| 1270 | (if func | |
| 1271 | (funcall func handle ctl) | |
| 1272 | handle))) | |
| 1273 | ||
| 1274 | ;;;###autoload | |
| 1275 | (defun mml2015-decrypt-test (handle ctl) | |
| 1276 | mml2015-use) | |
| 1277 | ||
| 1278 | ;;;###autoload | |
| 1279 | (defun mml2015-verify (handle ctl) | |
| 1280 | (mml2015-clean-buffer) | |
| 1281 | (let ((func (nth 3 (assq mml2015-use mml2015-function-alist)))) | |
| 1282 | (if func | |
| 1283 | (funcall func handle ctl) | |
| 1284 | handle))) | |
| 1285 | ||
| 1286 | ;;;###autoload | |
| 1287 | (defun mml2015-verify-test (handle ctl) | |
| 1288 | mml2015-use) | |
| 1289 | ||
| 1290 | ;;;###autoload | |
| 1291 | (defun mml2015-encrypt (cont &optional sign) | |
| 1292 | (mml2015-clean-buffer) | |
| 1293 | (let ((func (nth 2 (assq mml2015-use mml2015-function-alist)))) | |
| 1294 | (if func | |
| 1295 | (funcall func cont sign) | |
| 1296 | (error "Cannot find encrypt function")))) | |
| 1297 | ||
| 1298 | ;;;###autoload | |
| 1299 | (defun mml2015-sign (cont) | |
| 1300 | (mml2015-clean-buffer) | |
| 1301 | (let ((func (nth 1 (assq mml2015-use mml2015-function-alist)))) | |
| 1302 | (if func | |
| 1303 | (funcall func cont) | |
| 1304 | (error "Cannot find sign function")))) | |
| 1305 | ||
| 1306 | ;;;###autoload | |
| 1307 | (defun mml2015-self-encrypt () | |
| 1308 | (mml2015-encrypt nil)) | |
| 1309 | ||
| 1310 | (provide 'mml2015) | |
| 1311 | ||
| 23f87bed | 1312 | ;;; mml2015.el ends here |