;;; 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 <morioka@jaist.ac.jp>
+;; Author: MORIOKA Tomohiko <tomo@m17n.org>
+;; Daiki Ueno <ueno@unixuser.org>
;; Created: 1995/12/7
-;; Version: $Id: mime-pgp.el,v 0.0 1997-02-27 08:09:32 tmorioka Exp $
-;; Keywords: mail, news, MIME, multimedia, PGP, security
+;; Renamed: 1997/2/27 from tm-pgp.el
+;; 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
;; 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:
-
-;; - RFC 2015: "MIME Security with Pretty Good Privacy (PGP)"
-;; by Michael Elkins <elkins@aero.org> (1996/6)
-;;
-;; - draft-kazu-pgp-mime-00.txt: "PGP MIME Integration"
-;; by Kazuhiko Yamamoto <kazu@is.aist-nara.ac.jp>
-;; (1995/10; expired)
-;;
-;; These drafts may be contrary to each other. You should decide
-;; which you support. (Maybe you should use PGP/MIME)
-
;;; Code:
(require 'mime-play)
+(require 'epg)
+(require 'epa)
+
+;;; @ 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 application/*-signature
+
+(defun mime-verify-application/*-signature (entity situation)
+ (let* ((mother (mime-entity-parent entity))
+ (orig-entity (car (mime-entity-children mother)))
+ (protocol (cdr (assoc "protocol" (mime-entity-parameters mother))))
+ (context (epg-make-context
+ (if (equal protocol "application/pgp-signature")
+ 'OpenPGP
+ (if (string-match
+ "\\`application/\\(x-\\)?pkcs7-signature\\'"
+ protocol)
+ 'CMS
+ (error "Unknown protocol: %s" protocol)))))
+ verify-result)
+ (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))))
+ (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-verify-result verify-result)))))
-;;; @ internal method for application/pgp
-;;;
-;;; It is based on draft-kazu-pgp-mime-00.txt
+;;; @ Internal method for application/pgp-encrypted
-(defun mime-article/view-application/pgp (beg end cal)
- (let* ((cnum (mime-article/point-content-number beg))
- (cur-buf (current-buffer))
- (p-win (or (get-buffer-window mime::article/preview-buffer)
+(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) cnum))
- (mother mime::article/preview-buffer)
- (mode major-mode)
- code-converter
- (str (buffer-substring beg end))
- )
- (set-buffer (get-buffer-create new-name))
- (erase-buffer)
- (insert str)
- (cond ((progn
- (goto-char (point-min))
- (re-search-forward "^-+BEGIN PGP SIGNED MESSAGE-+$" nil t)
- )
- (funcall (pgp-function 'verify))
- (goto-char (point-min))
- (delete-region
- (point-min)
- (and
- (re-search-forward "^-+BEGIN PGP SIGNED MESSAGE-+\n\n")
- (match-end 0))
- )
- (delete-region
- (and (re-search-forward "^-+BEGIN PGP SIGNATURE-+")
- (match-beginning 0))
- (point-max)
- )
- (goto-char (point-min))
- (while (re-search-forward "^- -" nil t)
- (replace-match "-")
- )
- (setq code-converter
- (or
- (cdr (assq mode mime-viewer/code-converter-alist))
- (function mime-viewer/default-code-convert-region)))
- )
- ((progn
- (goto-char (point-min))
- (re-search-forward "^-+BEGIN PGP MESSAGE-+$" 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 code-converter (function mime-charset/decode-buffer))
- ))
- (setq major-mode 'mime/show-message-mode)
- (setq mime::article/code-converter code-converter)
- (save-window-excursion (mime/viewer-mode mother))
- (set-window-buffer p-win mime::article/preview-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)
- ))
-
-
-;;; @ Internal method for application/pgp-signature
-;;;
-;;; It is based on RFC 2015.
-
-(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)
+ (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)
- )
- (let* ((lang (or mime-pgp-default-language 'en))
- (status
- (call-process-region (point-min)(point-max)
- "pgp" 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))
- (onum (if (> knum 0)
- (1- knum)
- (1+ knum)))
- (oinfo (mime-article/rcnum-to-cinfo (cons onum rmcnum)
- mime::article/content-info))
- status str kbuf
- (basename (expand-file-name "tm" mime/tmp-dir))
- (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/output-buffer-name orig-file)
- (let (pgp-id)
- (save-excursion
- (set-buffer mime/output-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/output-buffer-name orig-file)
- ))
- ))
- (let ((other-window-scroll-buffer mime/output-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)
- ))
-
+ (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-verify-result verify-result)))))
-;;; @ Internal method for application/pgp-encrypted
-;;;
-;;; It is based on RFC 2015.
-(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))
- (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)
- ))
+;;; @ Internal method for application/pgp-keys
-(set-atype 'mime/content-decoding-condition
- '((type . "application/pgp-encrypted")
- (method . mime-article/decrypt-pgp)
- ))
+(defun mime-add-application/pgp-keys (entity situation)
+ (epg-import-keys-from-string (epg-make-context)
+ (mime-entity-content entity)))
-;;; @ Internal method for application/pgp-keys
-;;;
-;;; It is based on RFC 2015.
+;;; @ Internal method for application/pkcs7-mime
-(defun mime-article/add-pgp-keys (beg end cal)
- (let* ((cnum (mime-article/point-content-number beg))
- (cur-buf (current-buffer))
- (new-name (format "%s-%s" (buffer-name) cnum))
- (mother mime::article/preview-buffer)
- (charset (cdr (assoc "charset" cal)))
- (encoding (cdr (assq 'encoding cal)))
- (mode major-mode)
- 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))
- ))
+(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))))
-(set-atype 'mime/content-decoding-condition
- '((type . "application/pgp-keys")
- (method . mime-article/add-pgp-keys)
- ))
-
;;; @ end
;;;
projects / elisp / semi.git / blobdiff