Add Secrets API search examples.
[gnus] / lisp / mml2015.el
index 6f9880f..1271168 100644 (file)
@@ -1,25 +1,24 @@
 ;;; mml2015.el --- MIME Security with Pretty Good Privacy (PGP)
-;; Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+
+;; Copyright (C) 2000-2011 Free Software Foundation, Inc.
 
 ;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
 ;; Keywords: PGP MIME MML
 
 ;; This file is part of GNU Emacs.
 
-;; GNU Emacs 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.
+;; GNU Emacs 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 3 of the License, or
+;; (at your option) any later version.
 
-;; GNU Emacs 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.
+;; GNU Emacs 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., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
 
 ;;; Commentary:
 
 
 ;;; Code:
 
+(eval-and-compile
+  ;; For Emacs <22.2 and XEmacs.
+  (unless (fboundp 'declare-function) (defmacro declare-function (&rest r)))
+
+  (if (locate-library "password-cache")
+      (require 'password-cache)
+    (require 'password)))
+
 (eval-when-compile (require 'cl))
 (require 'mm-decode)
 (require 'mm-util)
+(require 'mml)
+(require 'mml-sec)
+
+(defvar mc-pgp-always-sign)
+
+(declare-function epg-check-configuration "ext:epg-config"
+                  (config &optional minimum-version))
+(declare-function epg-configuration "ext:epg-config" ())
 
 (defvar mml2015-use (or
+                    (condition-case nil
+                        (progn
+                          (require 'epg-config)
+                          (epg-check-configuration (epg-configuration))
+                          'epg)
+                      (error))
                     (progn
-                      (ignore-errors
-                        (require 'pgg))
+                      (ignore-errors (require 'pgg))
                       (and (fboundp 'pgg-sign-region)
                            'pgg))
-                    (progn
-                      (ignore-errors
-                        (require 'gpg))
-                      (and (fboundp 'gpg-sign-detached)
-                           'gpg))
                     (progn (ignore-errors
                              (load "mc-toplev"))
                            (and (fboundp 'mc-encrypt-generic)
                                 (fboundp 'mc-sign-generic)
                                 (fboundp 'mc-cleanup-recipient-headers)
                                 'mailcrypt)))
-  "The package used for PGP/MIME.")
+  "The package used for PGP/MIME.
+Valid packages include `epg', `pgg' and `mailcrypt'.")
 
 ;; Something is not RFC2015.
 (defvar mml2015-function-alist
               mml2015-mailcrypt-decrypt
               mml2015-mailcrypt-clear-verify
               mml2015-mailcrypt-clear-decrypt)
-    (gpg mml2015-gpg-sign
-        mml2015-gpg-encrypt
-        mml2015-gpg-verify
-        mml2015-gpg-decrypt
-        mml2015-gpg-clear-verify
-        mml2015-gpg-clear-decrypt)
-  (pgg mml2015-pgg-sign
-       mml2015-pgg-encrypt
-       mml2015-pgg-verify
-       mml2015-pgg-decrypt
-       mml2015-pgg-clear-verify
-       mml2015-pgg-clear-decrypt))
+    (pgg mml2015-pgg-sign
+        mml2015-pgg-encrypt
+        mml2015-pgg-verify
+        mml2015-pgg-decrypt
+        mml2015-pgg-clear-verify
+        mml2015-pgg-clear-decrypt)
+    (epg mml2015-epg-sign
+        mml2015-epg-encrypt
+        mml2015-epg-verify
+        mml2015-epg-decrypt
+        mml2015-epg-clear-verify
+        mml2015-epg-clear-decrypt))
   "Alist of PGP/MIME functions.")
 
 (defvar mml2015-result-buffer nil)
     ("TRUST_FULLY"     . t)
     ("TRUST_ULTIMATE"  . t))
   "Map GnuPG trust output values to a boolean saying if you trust the key."
+  :version "22.1"
+  :group 'mime-security
   :type '(repeat (cons (regexp :tag "GnuPG output regexp")
                       (boolean :tag "Trust key"))))
 
-;;; mailcrypt wrapper
+(defcustom mml2015-cache-passphrase mml-secure-cache-passphrase
+  "If t, cache passphrase."
+  :group 'mime-security
+  :type 'boolean)
 
-(eval-and-compile
-  (autoload 'mailcrypt-decrypt "mailcrypt")
-  (autoload 'mailcrypt-verify "mailcrypt")
-  (autoload 'mc-pgp-always-sign "mailcrypt")
-  (autoload 'mc-encrypt-generic "mc-toplev")
-  (autoload 'mc-cleanup-recipient-headers "mc-toplev")
-  (autoload 'mc-sign-generic "mc-toplev"))
+(defcustom mml2015-passphrase-cache-expiry mml-secure-passphrase-cache-expiry
+  "How many seconds the passphrase is cached.
+Whether the passphrase is cached at all is controlled by
+`mml2015-cache-passphrase'."
+  :group 'mime-security
+  :type 'integer)
+
+(defcustom mml2015-signers nil
+  "A list of your own key ID which will be used to sign a message.
+If set, it overrides the setting of `mml2015-sign-with-sender'."
+  :group 'mime-security
+  :type '(repeat (string :tag "Key ID")))
+
+(defcustom mml2015-sign-with-sender nil
+  "If t, use message sender so find a key to sign with."
+  :group 'mime-security
+  :type 'boolean
+  :version "24.1")
+
+(defcustom mml2015-encrypt-to-self nil
+  "If t, add your own key ID to recipient list when encryption."
+  :group 'mime-security
+  :type 'boolean)
+
+(defcustom mml2015-always-trust t
+  "If t, GnuPG skip key validation on encryption."
+  :group 'mime-security
+  :type 'boolean)
+
+;; Extract plaintext from cleartext signature.  IMO, this kind of task
+;; should be done by GnuPG rather than Elisp, but older PGP backends
+;; (such as Mailcrypt, and PGG) discard the output from GnuPG.
+(defun mml2015-extract-cleartext-signature ()
+  ;; Daiki Ueno in
+  ;; <54a15d860801080142l70b95d7dkac4bf51a86196011@mail.gmail.com>: ``I still
+  ;; believe that the right way is to use the plaintext output from GnuPG as
+  ;; it is, and mml2015-extract-cleartext-signature is just a kludge for
+  ;; misdesigned libraries like PGG, which have no ability to do that.  So, I
+  ;; think it should not have descriptive documentation.''
+  ;;
+  ;; This function doesn't handle NotDashEscaped correctly.  EasyPG handles it
+  ;; correctly.
+  ;; http://thread.gmane.org/gmane.emacs.gnus.general/66062/focus=66082
+  ;; http://thread.gmane.org/gmane.emacs.gnus.general/65087/focus=65109
+  (goto-char (point-min))
+  (forward-line)
+  ;; We need to be careful not to strip beyond the armor headers.
+  ;; Previously, an attacker could replace the text inside our
+  ;; markup with trailing garbage by injecting whitespace into the
+  ;; message.
+  (while (looking-at "Hash:")          ; The only header allowed in cleartext
+    (forward-line))                    ; signatures according to RFC2440.
+  (when (looking-at "[\t ]*$")
+    (forward-line))
+  (delete-region (point-min) (point))
+  (if (re-search-forward "^-----BEGIN PGP SIGNATURE-----" nil t)
+      (delete-region (match-beginning 0) (point-max)))
+  (goto-char (point-min))
+  (while (re-search-forward "^- " nil t)
+    (replace-match "" t t)
+    (forward-line 1)))
+
+;;; mailcrypt wrapper
 
-(eval-when-compile
-  (defvar mc-default-scheme)
-  (defvar mc-schemes))
+(autoload 'mailcrypt-decrypt "mailcrypt")
+(autoload 'mailcrypt-verify "mailcrypt")
+(autoload 'mc-pgp-always-sign "mailcrypt")
+(autoload 'mc-encrypt-generic "mc-toplev")
+(autoload 'mc-cleanup-recipient-headers "mc-toplev")
+(autoload 'mc-sign-generic "mc-toplev")
 
 (defvar mml2015-decrypt-function 'mailcrypt-decrypt)
 (defvar mml2015-verify-function 'mailcrypt-verify)
          handles
        (list handles)))))
 
+(defun mml2015-gpg-pretty-print-fpr (fingerprint)
+  (let* ((result "")
+        (fpr-length (string-width fingerprint))
+        (n-slice 0)
+        slice)
+    (setq fingerprint (string-to-list fingerprint))
+    (while fingerprint
+      (setq fpr-length (- fpr-length 4))
+      (setq slice (butlast fingerprint fpr-length))
+      (setq fingerprint (nthcdr 4 fingerprint))
+      (setq n-slice (1+ n-slice))
+      (setq result
+           (concat
+            result
+            (case n-slice
+              (1  slice)
+              (otherwise (concat " " slice))))))
+    result))
+
+(defun mml2015-gpg-extract-signature-details ()
+  (goto-char (point-min))
+  (let* ((expired (re-search-forward
+                  "^\\[GNUPG:\\] SIGEXPIRED$"
+                  nil t))
+        (signer (and (re-search-forward
+                      "^\\[GNUPG:\\] GOODSIG \\([0-9A-Za-z]*\\) \\(.*\\)$"
+                      nil t)
+                     (cons (match-string 1) (match-string 2))))
+        (fprint (and (re-search-forward
+                      "^\\[GNUPG:\\] VALIDSIG \\([0-9a-zA-Z]*\\) "
+                      nil t)
+                     (match-string 1)))
+        (trust  (and (re-search-forward
+                      "^\\[GNUPG:\\] \\(TRUST_.*\\)$"
+                      nil t)
+                     (match-string 1)))
+        (trust-good-enough-p
+         (cdr (assoc trust mml2015-unabbrev-trust-alist))))
+    (cond ((and signer fprint)
+          (concat (cdr signer)
+                  (unless trust-good-enough-p
+                    (concat "\nUntrusted, Fingerprint: "
+                            (mml2015-gpg-pretty-print-fpr fprint)))
+                  (when expired
+                    (format "\nWARNING: Signature from expired key (%s)"
+                            (car signer)))))
+         ((re-search-forward
+           "^\\(gpg: \\)?Good signature from \"\\(.*\\)\"$" nil t)
+          (match-string 2))
+         (t
+          "From unknown user"))))
+
 (defun mml2015-mailcrypt-clear-decrypt ()
   (let (result)
     (setq result
        (mm-set-handle-multipart-parameter
         mm-security-handle 'gnus-info "OK")
       (mm-set-handle-multipart-parameter
-       mm-security-handle 'gnus-info "Failed"))))
+       mm-security-handle 'gnus-info "Failed")))
+  (mml2015-extract-cleartext-signature))
 
 (defun mml2015-mailcrypt-sign (cont)
   (mc-sign-generic (message-options-get 'message-sender)
                   nil nil nil nil)
-  (let ((boundary
-        (funcall mml-boundary-function (incf mml-multipart-number)))
+  (let ((boundary (mml-compute-boundary cont))
        hash point)
     (goto-char (point-min))
     (unless (re-search-forward "^-----BEGIN PGP SIGNED MESSAGE-----\r?$" nil t)
     (insert (format "--%s--\n" boundary))
     (goto-char (point-max))))
 
+;; We require mm-decode, which requires mm-bodies, which autoloads
+;; message-options-get (!).
+(declare-function message-options-set "message" (symbol value))
+
 (defun mml2015-mailcrypt-encrypt (cont &optional sign)
   (let ((mc-pgp-always-sign
         (or mc-pgp-always-sign
                        (or (y-or-n-p "Sign the message? ")
                            'not))))
             'never)))
-    (mm-with-unibyte-current-buffer-mule4
+    (mm-with-unibyte-current-buffer
       (mc-encrypt-generic
        (or (message-options-get 'message-recipients)
           (message-options-set 'message-recipients
   (goto-char (point-min))
   (unless (looking-at "-----BEGIN PGP MESSAGE-----")
     (error "Fail to encrypt the message"))
-  (let ((boundary
-        (funcall mml-boundary-function (incf mml-multipart-number))))
+  (let ((boundary (mml-compute-boundary cont)))
     (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n"
                    boundary))
     (insert "\tprotocol=\"application/pgp-encrypted\"\n\n")
     (insert (format "--%s--\n" boundary))
     (goto-char (point-max))))
 
-;;; gpg wrapper
-
-(eval-and-compile
-  (autoload 'gpg-decrypt "gpg")
-  (autoload 'gpg-verify "gpg")
-  (autoload 'gpg-verify-cleartext "gpg")
-  (autoload 'gpg-sign-detached "gpg")
-  (autoload 'gpg-sign-encrypt "gpg")
-  (autoload 'gpg-encrypt "gpg")
-  (autoload 'gpg-passphrase-read "gpg"))
-
-(defun mml2015-gpg-passphrase ()
-  (or (message-options-get 'gpg-passphrase)
-      (message-options-set 'gpg-passphrase (gpg-passphrase-read))))
-
-(defun mml2015-gpg-decrypt-1 ()
-  (let ((cipher (current-buffer)) plain result)
-    (if (with-temp-buffer
-         (prog1
-             (gpg-decrypt cipher (setq plain (current-buffer))
-                          mml2015-result-buffer nil)
-           (mm-set-handle-multipart-parameter
-            mm-security-handle 'gnus-details
-            (with-current-buffer mml2015-result-buffer
-              (buffer-string)))
-           (set-buffer cipher)
-           (erase-buffer)
-           (insert-buffer plain)
-           (goto-char (point-min))
-           (while (search-forward "\r\n" nil t)
-             (replace-match "\n" t t))))
-       '(t)
-      ;; Some wrong with the return value, check plain text buffer.
-      (if (> (point-max) (point-min))
-         '(t)
-       nil))))
-
-(defun mml2015-gpg-decrypt (handle ctl)
-  (let ((mml2015-decrypt-function 'mml2015-gpg-decrypt-1))
-    (mml2015-mailcrypt-decrypt handle ctl)))
-
-(defun mml2015-gpg-clear-decrypt ()
-  (let (result)
-    (setq result (mml2015-gpg-decrypt-1))
-    (if (car result)
-       (mm-set-handle-multipart-parameter
-        mm-security-handle 'gnus-info "OK")
-      (mm-set-handle-multipart-parameter
-       mm-security-handle 'gnus-info "Failed"))))
-
-(defun mml2015-gpg-pretty-print-fpr (fingerprint)
-  (let* ((result "")
-        (fpr-length (string-width fingerprint))
-        (n-slice 0)
-        slice)
-    (setq fingerprint (string-to-list fingerprint))
-    (while fingerprint
-      (setq fpr-length (- fpr-length 4))
-      (setq slice (butlast fingerprint fpr-length))
-      (setq fingerprint (nthcdr 4 fingerprint))
-      (setq n-slice (1+ n-slice))
-      (setq result
-           (concat
-            result
-            (case n-slice
-              (1  slice)
-              (otherwise (concat " " slice))))))
-    result))
-
-(defun mml2015-gpg-extract-signature-details ()
-  (goto-char (point-min))
-  (let* ((expired (re-search-forward
-                  "^\\[GNUPG:\\] SIGEXPIRED$"
-                  nil t))
-        (signer (and (re-search-forward
-                      "^\\[GNUPG:\\] GOODSIG \\([0-9A-Za-z]*\\) \\(.*\\)$"
-                      nil t)
-                     (cons (match-string 1) (match-string 2))))
-        (fprint (and (re-search-forward
-                      "^\\[GNUPG:\\] VALIDSIG \\([0-9a-zA-Z]*\\) "
-                      nil t)
-                     (match-string 1)))
-        (trust  (and (re-search-forward
-                      "^\\[GNUPG:\\] \\(TRUST_.*\\)$"
-                      nil t)
-                     (match-string 1)))
-        (trust-good-enough-p
-         (cdr (assoc trust mml2015-unabbrev-trust-alist))))
-    (cond ((and signer fprint)
-          (concat (cdr signer)
-                  (unless trust-good-enough-p
-                    (concat "\nUntrusted, Fingerprint: "
-                            (mml2015-gpg-pretty-print-fpr fprint)))
-                  (when expired
-                    (format "\nWARNING: Signature from expired key (%s)"
-                            (car signer)))))
-         ((re-search-forward
-           "^\\(gpg: \\)?Good signature from \"\\(.*\\)\"$" nil t)
-          (match-string 2))
-         (t
-          "From unknown user"))))
-
-(defun mml2015-gpg-verify (handle ctl)
-  (catch 'error
-    (let (part message signature info-is-set-p)
-      (unless (setq part (mm-find-raw-part-by-type
-                         ctl (or (mm-handle-multipart-ctl-parameter
-                                  ctl 'protocol)
-                                 "application/pgp-signature")
-                         t))
-       (mm-set-handle-multipart-parameter
-        mm-security-handle 'gnus-info "Corrupted")
-       (throw 'error handle))
-      (with-temp-buffer
-       (setq message (current-buffer))
-       (insert part)
-       ;; Convert <LF> to <CR><LF> in verify mode.  Sign and
-       ;; clearsign use --textmode. The conversion is not necessary.
-       ;; In clearverify, the conversion is not necessary either.
-       (goto-char (point-min))
-       (end-of-line)
-       (while (not (eobp))
-         (unless (eq (char-before) ?\r)
-           (insert "\r"))
-         (forward-line)
-         (end-of-line))
-       (with-temp-buffer
-         (setq signature (current-buffer))
-         (unless (setq part (mm-find-part-by-type
-                             (cdr handle) "application/pgp-signature" nil t))
-           (mm-set-handle-multipart-parameter
-            mm-security-handle 'gnus-info "Corrupted")
-           (throw 'error handle))
-         (mm-insert-part part)
-         (unless (condition-case err
-                     (prog1
-                         (gpg-verify message signature mml2015-result-buffer)
-                       (mm-set-handle-multipart-parameter
-                        mm-security-handle 'gnus-details
-                        (with-current-buffer mml2015-result-buffer
-                          (buffer-string))))
-                   (error
-                    (mm-set-handle-multipart-parameter
-                     mm-security-handle 'gnus-details (mml2015-format-error err))
-                    (mm-set-handle-multipart-parameter
-                     mm-security-handle 'gnus-info "Error.")
-                    (setq info-is-set-p t)
-                    nil)
-                   (quit
-                    (mm-set-handle-multipart-parameter
-                     mm-security-handle 'gnus-details "Quit.")
-                    (mm-set-handle-multipart-parameter
-                     mm-security-handle 'gnus-info "Quit.")
-                    (setq info-is-set-p t)
-                    nil))
-           (unless info-is-set-p
-             (mm-set-handle-multipart-parameter
-              mm-security-handle 'gnus-info "Failed"))
-           (throw 'error handle)))
-       (mm-set-handle-multipart-parameter
-        mm-security-handle 'gnus-info
-        (with-current-buffer mml2015-result-buffer
-          (mml2015-gpg-extract-signature-details))))
-      handle)))
-
-(defun mml2015-gpg-clear-verify ()
-  (if (condition-case err
-         (prog1
-             (gpg-verify-cleartext (current-buffer) mml2015-result-buffer)
-           (mm-set-handle-multipart-parameter
-            mm-security-handle 'gnus-details
-            (with-current-buffer mml2015-result-buffer
-              (buffer-string))))
-       (error
-        (mm-set-handle-multipart-parameter
-         mm-security-handle 'gnus-details (mml2015-format-error err))
-        nil)
-       (quit
-        (mm-set-handle-multipart-parameter
-         mm-security-handle 'gnus-details "Quit.")
-        nil))
-      (mm-set-handle-multipart-parameter
-       mm-security-handle 'gnus-info
-       (with-current-buffer mml2015-result-buffer
-        (mml2015-gpg-extract-signature-details)))
-    (mm-set-handle-multipart-parameter
-     mm-security-handle 'gnus-info "Failed")))
-
-(defun mml2015-gpg-sign (cont)
-  (let ((boundary
-        (funcall mml-boundary-function (incf mml-multipart-number)))
-       (text (current-buffer)) signature)
-    (goto-char (point-max))
-    (unless (bolp)
-      (insert "\n"))
-    (with-temp-buffer
-      (unless (gpg-sign-detached text (setq signature (current-buffer))
-                                mml2015-result-buffer
-                                nil
-                                (message-options-get 'message-sender)
-                                t t) ; armor & textmode
-       (unless (> (point-max) (point-min))
-         (pop-to-buffer mml2015-result-buffer)
-         (error "Sign error")))
-      (goto-char (point-min))
-      (while (re-search-forward "\r+$" nil t)
-       (replace-match "" t t))
-      (set-buffer text)
-      (goto-char (point-min))
-      (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n"
-                     boundary))
-      ;;; FIXME: what is the micalg?
-      (insert "\tmicalg=pgp-sha1; protocol=\"application/pgp-signature\"\n")
-      (insert (format "\n--%s\n" boundary))
-      (goto-char (point-max))
-      (insert (format "\n--%s\n" boundary))
-      (insert "Content-Type: application/pgp-signature\n\n")
-      (insert-buffer signature)
-      (goto-char (point-max))
-      (insert (format "--%s--\n" boundary))
-      (goto-char (point-max)))))
-
-(defun mml2015-gpg-encrypt (cont &optional sign)
-  (let ((boundary
-        (funcall mml-boundary-function (incf mml-multipart-number)))
-       (text (current-buffer))
-       cipher)
-    (mm-with-unibyte-current-buffer-mule4
-      (with-temp-buffer
-       ;; set up a function to call the correct gpg encrypt routine
-       ;; with the right arguments. (FIXME: this should be done
-       ;; differently.)
-       (flet ((gpg-encrypt-func 
-                (sign plaintext ciphertext result recipients &optional
-                      passphrase sign-with-key armor textmode)
-                (if sign
-                    (gpg-sign-encrypt
-                     plaintext ciphertext result recipients passphrase
-                     sign-with-key armor textmode)
-                  (gpg-encrypt
-                   plaintext ciphertext result recipients passphrase
-                   armor textmode))))
-         (unless (gpg-encrypt-func
-                   sign ; passed in when using signencrypt
-                   text (setq cipher (current-buffer))
-                   mml2015-result-buffer
-                   (split-string
-                    (or
-                     (message-options-get 'message-recipients)
-                     (message-options-set 'message-recipients
-                                          (read-string "Recipients: ")))
-                    "[ \f\t\n\r\v,]+")
-                   nil
-                   (message-options-get 'message-sender)
-                   t t) ; armor & textmode
-           (unless (> (point-max) (point-min))
-             (pop-to-buffer mml2015-result-buffer)
-             (error "Encrypt error"))))
-       (goto-char (point-min))
-       (while (re-search-forward "\r+$" nil t)
-         (replace-match "" t t))
-       (set-buffer text)
-       (delete-region (point-min) (point-max))
-       (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n"
-                       boundary))
-       (insert "\tprotocol=\"application/pgp-encrypted\"\n\n")
-       (insert (format "--%s\n" boundary))
-       (insert "Content-Type: application/pgp-encrypted\n\n")
-       (insert "Version: 1\n\n")
-       (insert (format "--%s\n" boundary))
-       (insert "Content-Type: application/octet-stream\n\n")
-       (insert-buffer cipher)
-       (goto-char (point-max))
-       (insert (format "--%s--\n" boundary))
-       (goto-char (point-max))))))
-
 ;;; pgg wrapper
 
-(eval-when-compile
-  (defvar pgg-errors-buffer)
-  (defvar pgg-output-buffer))
+(defvar pgg-default-user-id)
+(defvar pgg-errors-buffer)
+(defvar pgg-output-buffer)
 
-(eval-and-compile
-  (autoload 'pgg-decrypt-region "pgg")
-  (autoload 'pgg-verify-region "pgg")
-  (autoload 'pgg-sign-region "pgg")
-  (autoload 'pgg-encrypt-region "pgg"))
+(autoload 'pgg-decrypt-region "pgg")
+(autoload 'pgg-verify-region "pgg")
+(autoload 'pgg-sign-region "pgg")
+(autoload 'pgg-encrypt-region "pgg")
+(autoload 'pgg-parse-armor "pgg-parse")
 
 (defun mml2015-pgg-decrypt (handle ctl)
   (catch 'error
        (if (condition-case err
                (prog1
                    (pgg-decrypt-region (point-min) (point-max))
-                 (setq decrypt-status 
+                 (setq decrypt-status
                        (with-current-buffer mml2015-result-buffer
                          (buffer-string)))
                  (mm-set-handle-multipart-parameter
             (buffer-string))))
        (progn
          (erase-buffer)
-         (insert-buffer pgg-output-buffer)
+         ;; Treat data which pgg returns as a unibyte string.
+         (mm-disable-multibyte)
+         (insert-buffer-substring pgg-output-buffer)
          (goto-char (point-min))
          (while (search-forward "\r\n" nil t)
            (replace-match "\n" t t))
          handle)
       (with-temp-buffer
        (insert part)
-       ;; Convert <LF> to <CR><LF> in verify mode.  Sign and
-       ;; clearsign use --textmode. The conversion is not necessary.
-       ;; In clearverify, the conversion is not necessary either.
+       ;; Convert <LF> to <CR><LF> in signed text.  If --textmode is
+       ;; specified when signing, the conversion is not necessary.
        (goto-char (point-min))
        (end-of-line)
        (while (not (eobp))
          (mm-insert-part signature))
        (if (condition-case err
                (prog1
-                   (pgg-verify-region (point-min) (point-max) 
+                   (pgg-verify-region (point-min) (point-max)
                                       signature-file t)
                  (goto-char (point-min))
                  (while (search-forward "\r\n" nil t)
@@