X-Git-Url: http://git.chise.org/gitweb/?p=elisp%2Fsemi.git;a=blobdiff_plain;f=mime-pgp.el;h=8f49a2e11818ccb965461d5607d86865f3bdb48f;hp=67a59bc4bd97bf5466da338299e383b1527e7eee;hb=HEAD;hpb=7703be8f24891512d5c363de793d28d081671c0c diff --git a/mime-pgp.el b/mime-pgp.el index 67a59bc..8f49a2e 100644 --- a/mime-pgp.el +++ b/mime-pgp.el @@ -1,14 +1,14 @@ ;;; mime-pgp.el --- mime-view internal methods for PGP. -;; Copyright (C) 1995,1996,1997 MORIOKA Tomohiko +;; Copyright (C) 1995,1996,1997,1998,1999,2000 Free Software Foundation, Inc. -;; Author: MORIOKA Tomohiko +;; Author: MORIOKA Tomohiko +;; Daiki Ueno ;; Created: 1995/12/7 ;; Renamed: 1997/2/27 from tm-pgp.el -;; Version: $Id: mime-pgp.el,v 0.16 1997-03-27 20:39:15 morioka Exp $ ;; Keywords: PGP, security, MIME, multimedia, mail, news -;; This file is part of SEMI (SEMI is Emacs MIME Interfaces). +;; 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 @@ -22,284 +22,266 @@ ;; 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., 59 Temple Place - Suite 330, -;; Boston, MA 02111-1307, USA. +;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, +;; Boston, MA 02110-1301, USA. ;;; Commentary: -;; This module is based on 2 drafts about PGP MIME integration: +;; This module is based on -;; - RFC 2015: "MIME Security with Pretty Good Privacy (PGP)" -;; by Michael Elkins (1996/6) -;; -;; - draft-kazu-pgp-mime-00.txt: "PGP MIME Integration" -;; by Kazuhiko Yamamoto -;; (1995/10; expired) -;; -;; These drafts may be contrary to each other. You should decide -;; which you support. (Maybe you should use PGP/MIME) +;; [security-multipart] RFC 1847: "Security Multiparts for MIME: +;; Multipart/Signed and Multipart/Encrypted" by +;; Jim Galvin , Sandy Murphy , +;; Steve Crocker and +;; Ned Freed (1995/10) + +;; [PGP/MIME] RFC 2015: "MIME Security with Pretty Good Privacy +;; (PGP)" by Michael Elkins (1996/6) + +;; [PGP-kazu] draft-kazu-pgp-mime-00.txt: "PGP MIME Integration" +;; by Kazuhiko Yamamoto (1995/10; +;; expired) + +;; [OpenPGP/MIME] draft-yamamoto-openpgp-mime-00.txt: "MIME +;; Security with OpenPGP (OpenPGP/MIME)" by Kazuhiko YAMAMOTO +;; (1998/1) ;;; Code: (require 'mime-play) +(require 'pgg-def) + +(autoload 'pgg-decrypt-region "pgg" + "PGP decryption of current region." t) +(autoload 'pgg-verify-region "pgg" + "PGP verification of current region." t) +(autoload 'pgg-snarf-keys-region "pgg" + "Snarf PGP public keys in current region." t) +(autoload 'smime-decrypt-region "smime" + "S/MIME decryption of current region.") +(autoload 'smime-verify-region "smime" + "S/MIME verification of current region.") +(defvar smime-output-buffer) +(defvar smime-errors-buffer) + + +;;; @ Internal method for multipart/signed +;;; +;;; It is based on RFC 1847 (security-multipart). + +(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 application/pgp ;;; -;;; It is based on draft-kazu-pgp-mime-00.txt +;;; It is based on draft-kazu-pgp-mime-00.txt (PGP-kazu). -(defun mime-article/view-application/pgp (beg end cal) - (let* ((cnum (mime-article/point-content-number beg)) - (p-win (or (get-buffer-window mime-view-buffer) +(defun mime-view-application/pgp (entity situation) + (let* ((p-win (or (get-buffer-window (current-buffer)) (get-largest-window))) - (new-name (format "%s-%s" (buffer-name) cnum)) - (the-buf (current-buffer)) - (mother mime-view-buffer) - (mode major-mode) - text-decoder) - (set-buffer (get-buffer-create new-name)) + (new-name + (format "%s-%s" (buffer-name) (mime-entity-number entity))) + (mother (current-buffer)) + (preview-buffer (concat "*Preview-" (buffer-name) "*")) + representation-type message-buf) + (set-buffer (setq message-buf (get-buffer-create new-name))) (erase-buffer) - (insert-buffer-substring the-buf beg end) + (mime-insert-entity entity) (cond ((progn (goto-char (point-min)) - (re-search-forward "^-+BEGIN PGP SIGNED MESSAGE-+$" nil t) - ) - (funcall (pgp-function 'verify)) + (re-search-forward "^-+BEGIN PGP SIGNED MESSAGE-+$" nil t)) + (pgg-verify-region (match-beginning 0)(point-max) nil 'fetch) (goto-char (point-min)) (delete-region (point-min) (and (re-search-forward "^-+BEGIN PGP SIGNED MESSAGE-+\n\n") - (match-end 0)) - ) + (match-end 0))) (delete-region (and (re-search-forward "^-+BEGIN PGP SIGNATURE-+") (match-beginning 0)) - (point-max) - ) + (point-max)) (goto-char (point-min)) (while (re-search-forward "^- -" nil t) - (replace-match "-") - ) - (setq text-decoder - (cdr (or (assq mode mime-text-decoder-alist) - (assq t mime-text-decoder-alist)))) - ) + (replace-match "-")) + (setq representation-type (if (mime-entity-cooked-p entity) + 'cooked))) ((progn (goto-char (point-min)) - (re-search-forward "^-+BEGIN PGP MESSAGE-+$" nil t) - ) - (as-binary-process (funcall (pgp-function 'decrypt))) - (goto-char (point-min)) - (delete-region (point-min) - (and - (search-forward "\n\n") - (match-end 0))) - (setq text-decoder (function mime-text-decode-buffer)) - )) + (re-search-forward "^-+BEGIN PGP MESSAGE-+$" nil t)) + (pgg-decrypt-region (point-min)(point-max)) + (delete-region (point-min)(point-max)) + (insert-buffer pgg-output-buffer) + (setq representation-type 'binary))) (setq major-mode 'mime-show-message-mode) - (setq mime-text-decoder text-decoder) - (save-window-excursion (mime-view-mode mother)) - (set-window-buffer p-win mime-view-buffer) - )) - -(set-atype 'mime/content-decoding-condition - '((type . "application/pgp") - (method . mime-article/view-application/pgp) - )) - -(set-atype 'mime/content-decoding-condition - '((type . "text/x-pgp") - (method . mime-article/view-application/pgp) - )) + (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))) ;;; @ Internal method for application/pgp-signature ;;; -;;; It is based on RFC 2015. - -(defvar mime-pgp-command "pgp" - "*Name of the PGP command.") - -(defvar mime-pgp-default-language 'en - "*Symbol of language for pgp. -It should be ISO 639 2 letter language code such as en, ja, ...") - -(defvar mime-pgp-good-signature-regexp-alist - '((en . "Good signature from user.*$")) - "Alist of language vs regexp to detect ``Good signature''.") - -(defvar mime-pgp-key-expected-regexp-alist - '((en . "Key matching expected Key ID \\(\\S +\\) not found")) - "Alist of language vs regexp to detect ``Key expected''.") - -(defun mime::article/call-pgp-to-check-signature (output-buffer orig-file) - (save-excursion - (set-buffer output-buffer) - (erase-buffer) - ) - (let* ((lang (or mime-pgp-default-language 'en)) - (status (call-process-region (point-min)(point-max) - mime-pgp-command - nil output-buffer nil - orig-file (format "+language=%s" lang))) - (regexp (cdr (assq lang mime-pgp-good-signature-regexp-alist))) - ) - (if (= status 0) - (save-excursion - (set-buffer output-buffer) - (goto-char (point-min)) - (message - (cond ((not (stringp regexp)) - "Please specify right regexp for specified language") - ((re-search-forward regexp nil t) - (buffer-substring (match-beginning 0) (match-end 0)) - ) - (t - "Bad signature"))) - )))) - -(defun mime-article/check-pgp-signature (beg end cal) - (let* ((encoding (cdr (assq 'encoding cal))) - (cnum (mime-article/point-content-number beg)) - (rcnum (reverse cnum)) - (rmcnum (cdr rcnum)) - (knum (car rcnum)) +;;; It is based on RFC 2015 (PGP/MIME) and +;;; draft-yamamoto-openpgp-mime-00.txt (OpenPGP/MIME). + +(defun mime-verify-application/pgp-signature (entity situation) + "Internal method to check PGP/MIME signature." + (let* ((entity-node-id (mime-entity-node-id entity)) + (mother (mime-entity-parent entity)) + (knum (car entity-node-id)) (onum (if (> knum 0) (1- knum) (1+ knum))) - (oinfo (mime-article/rcnum-to-cinfo (cons onum rmcnum) - mime::article/content-info)) - str kbuf - (basename (expand-file-name "tm" mime-temp-directory)) - (orig-file (make-temp-name basename)) - (sig-file (concat orig-file ".sig")) - ) - (save-excursion - (setq str (buffer-substring - (mime::content-info/point-min oinfo) - (mime::content-info/point-max oinfo) - )) - (set-buffer (get-buffer-create mime/temp-buffer-name)) - (insert str) - (goto-char (point-min)) - (while (re-search-forward "\n" nil t) - (replace-match "\r\n") - ) - (as-binary-output-file (write-file orig-file)) - (kill-buffer (current-buffer)) - ) - (save-excursion - (mime-article/show-output-buffer) - ) - (save-excursion - (setq str (buffer-substring - (save-excursion - (goto-char beg) - (and (search-forward "\n\n") - (match-end 0))) - end)) - (set-buffer (setq kbuf (get-buffer-create mime/temp-buffer-name))) - (insert str) - (mime-decode-region (point-min)(point-max) encoding) - (as-binary-output-file (write-file sig-file)) - (or (mime::article/call-pgp-to-check-signature - mime-echo-buffer-name orig-file) - (let (pgp-id) - (save-excursion - (set-buffer mime-echo-buffer-name) - (goto-char (point-min)) - (let ((regexp (cdr (assq (or mime-pgp-default-language 'en) - mime-pgp-key-expected-regexp-alist)))) - (cond ((not (stringp regexp)) - (message - "Please specify right regexp for specified language") - ) - ((re-search-forward regexp nil t) - (setq pgp-id - (concat "0x" (buffer-substring-no-properties - (match-beginning 1) - (match-end 1)))) - )))) - (if (and pgp-id - (y-or-n-p - (format "Key %s not found; attempt to fetch? " pgp-id)) - ) - (progn - (funcall (pgp-function 'fetch-key) (cons nil pgp-id)) - (mime::article/call-pgp-to-check-signature - mime-echo-buffer-name orig-file) - )) - )) - (let ((other-window-scroll-buffer mime-echo-buffer-name)) - (scroll-other-window 8) - ) - (kill-buffer kbuf) - (delete-file orig-file) - (delete-file sig-file) - ))) - -(set-atype 'mime/content-decoding-condition - '((type . "application/pgp-signature") - (method . mime-article/check-pgp-signature) - )) + (orig-entity (nth onum (mime-entity-children mother))) + (sig-file (make-temp-file "tm" nil ".asc"))) + (save-excursion + (mime-show-echo-buffer) + (set-buffer mime-echo-buffer-name) + (set-window-start + (get-buffer-window mime-echo-buffer-name) + (point-max))) + (mime-write-entity-content entity sig-file) + (unwind-protect + (with-temp-buffer + (mime-insert-entity orig-entity) + (goto-char (point-min)) + (while (progn (end-of-line) (not (eobp))) + (insert "\r") + (forward-line 1)) + (pgg-verify-region (point-min)(point-max) + sig-file 'fetch) + (save-excursion + (set-buffer mime-echo-buffer-name) + (insert-buffer-substring pgg-errors-buffer))) + (delete-file sig-file)))) ;;; @ Internal method for application/pgp-encrypted ;;; -;;; It is based on RFC 2015. +;;; It is based on RFC 2015 (PGP/MIME) and +;;; draft-yamamoto-openpgp-mime-00.txt (OpenPGP/MIME). -(defun mime-article/decrypt-pgp (beg end cal) - (let* ((cnum (mime-article/point-content-number beg)) - (rcnum (reverse cnum)) - (rmcnum (cdr rcnum)) - (knum (car rcnum)) +(defun mime-decrypt-application/pgp-encrypted (entity situation) + (let* ((entity-node-id (mime-entity-node-id entity)) + (mother (mime-entity-parent entity)) + (knum (car entity-node-id)) (onum (if (> knum 0) (1- knum) (1+ knum))) - (oinfo (mime-article/rcnum-to-cinfo (cons onum rmcnum) - mime::article/content-info)) - (obeg (mime::content-info/point-min oinfo)) - (oend (mime::content-info/point-max oinfo)) - ) - (mime-article/view-application/pgp obeg oend cal) - )) - -(set-atype 'mime/content-decoding-condition - '((type . "application/pgp-encrypted") - (method . mime-article/decrypt-pgp) - )) + (orig-entity (nth onum (mime-entity-children mother)))) + (mime-view-application/pgp orig-entity situation))) ;;; @ Internal method for application/pgp-keys ;;; -;;; It is based on RFC 2015. - -(defun mime-article/add-pgp-keys (beg end cal) - (let* ((cnum (mime-article/point-content-number beg)) - (new-name (format "%s-%s" (buffer-name) cnum)) - (encoding (cdr (assq 'encoding cal))) - str) - (setq str (buffer-substring beg end)) - (switch-to-buffer new-name) - (setq buffer-read-only nil) - (erase-buffer) - (insert str) - (goto-char (point-min)) - (if (re-search-forward "^\n" nil t) - (delete-region (point-min) (match-end 0)) - ) - (mime-decode-region (point-min)(point-max) encoding) - (funcall (pgp-function 'snarf-keys)) - (kill-buffer (current-buffer)) - )) - -(set-atype 'mime/content-decoding-condition - '((type . "application/pgp-keys") - (method . mime-article/add-pgp-keys) - )) - - +;;; It is based on RFC 2015 (PGP/MIME) and +;;; draft-yamamoto-openpgp-mime-00.txt (OpenPGP/MIME). + +(defun mime-add-application/pgp-keys (entity situation) + (save-excursion + (mime-show-echo-buffer) + (set-buffer mime-echo-buffer-name) + (set-window-start + (get-buffer-window mime-echo-buffer-name) + (point-max))) + (with-temp-buffer + (mime-insert-entity-content entity) + (mime-decode-region (point-min) (point-max) + (cdr (assq 'encoding situation))) + (pgg-snarf-keys-region (point-min)(point-max)) + (save-excursion + (set-buffer mime-echo-buffer-name) + (insert-buffer-substring pgg-errors-buffer)))) + + +;;; @ Internal method for application/pkcs7-signature +;;; +;;; It is based on RFC 2633 (S/MIME version 3). + +(defun mime-verify-application/pkcs7-signature (entity situation) + "Internal method to check S/MIME signature." + (let* ((entity-node-id (mime-entity-node-id entity)) + (mother (mime-entity-parent entity)) + (knum (car entity-node-id)) + (onum (if (> knum 0) + (1- knum) + (1+ knum))) + (orig-entity (nth onum (mime-entity-children mother))) + (sig-file (make-temp-file "tm" nil ".asc")) + status) + (save-excursion + (mime-show-echo-buffer) + (set-buffer mime-echo-buffer-name) + (set-window-start + (get-buffer-window mime-echo-buffer-name) + (point-max))) + (mime-write-entity entity sig-file) + (unwind-protect + (with-temp-buffer + (mime-insert-entity orig-entity) + (goto-char (point-min)) + (while (progn (end-of-line) (not (eobp))) + (insert "\r") + (forward-line 1)) + (setq status (smime-verify-region (point-min)(point-max) + sig-file)) + (save-excursion + (set-buffer mime-echo-buffer-name) + (insert-buffer-substring (if status smime-output-buffer + smime-errors-buffer)))) + (delete-file sig-file)))) + + +;;; @ Internal method for application/pkcs7-mime +;;; +;;; It is based on RFC 2633 (S/MIME version 3). + +(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) "*")) + 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) + (mime-insert-entity entity) + (smime-decrypt-region (point-min)(point-max)) + (delete-region (point-min)(point-max)) + (insert-buffer smime-output-buffer)) + (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)))) + +(defun mime-display-multipart/pgp-encrypted (entity situation) + (if pgg-decrypt-automatically + (let ((pgp-begin (point))) + (mime-insert-entity entity) + (goto-char pgp-begin) + (when (re-search-forward "^-+BEGIN PGP MESSAGE-+$" nil t) + (pgg-decrypt-region pgp-begin (point-max)) + (delete-region pgp-begin (point-max)) + (mime-display-entity + (mime-parse-buffer pgg-output-buffer)))) + (mime-display-multipart/mixed entity situation))) + ;;; @ end ;;;