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* epa-file.el (epa-file-encrypt-to): Make it permanent local.
[epg/epg.git] / epa.el
diff --git a/epa.el b/epa.el
index 4ef4094..51b6d53 100644 (file)
--- a/epa.el
+++ b/epa.el
 (require 'font-lock)
 (require 'widget)
 (eval-when-compile (require 'wid-edit))
+(require 'derived)
 
 (defgroup epa nil
   "The EasyPG Assistant"
   :group 'epg)
 
-(defcustom epa-armor nil
-  "If non-nil, epa commands create ASCII armored output."
-  :type 'boolean
-  :group 'epa)
-
-(defcustom epa-textmode nil
-  "If non-nil, epa commands treat input files as text."
-  :type 'boolean
-  :group 'epa)
-
 (defcustom epa-popup-info-window t
   "If non-nil, status information from epa commands is displayed on
 the separate window."
@@ -161,13 +152,30 @@ the separate window."
     (17 . ?D)
     (20 . ?G)))
 
+(defvar epa-protocol 'OpenPGP
+  "*The default protocol.
+The value can be either OpenPGP or CMS.
+
+You should bind this variable with `let', but do not set it globally.")
+
+(defvar epa-armor nil
+  "*If non-nil, epa commands create ASCII armored output.
+
+You should bind this variable with `let', but do not set it globally.")
+
+(defvar epa-textmode nil
+  "*If non-nil, epa commands treat input files as text.
+
+You should bind this variable with `let', but do not set it globally.")
+
 (defvar epa-keys-buffer nil)
 (defvar epa-key-buffer-alist nil)
 (defvar epa-key nil)
 (defvar epa-list-keys-arguments nil)
 (defvar epa-info-buffer nil)
+(defvar epa-last-coding-system-specified nil)
 
-(defvar epa-keys-mode-map
+(defvar epa-key-list-mode-map
   (let ((keymap (make-sparse-keymap)))
     (define-key keymap "m" 'epa-mark)
     (define-key keymap "u" 'epa-unmark)
@@ -178,7 +186,7 @@ the separate window."
     (define-key keymap "r" 'epa-delete-keys)
     (define-key keymap "i" 'epa-import-keys)
     (define-key keymap "o" 'epa-export-keys)
-    (define-key keymap "g" 'epa-list-keys)
+    (define-key keymap "g" 'revert-buffer)
     (define-key keymap "n" 'next-line)
     (define-key keymap "p" 'previous-line)
     (define-key keymap " " 'scroll-up)
@@ -188,7 +196,7 @@ the separate window."
 
 (defvar epa-key-mode-map
   (let ((keymap (make-sparse-keymap)))
-    (define-key keymap "q" 'bury-buffer)
+    (define-key keymap "q" 'epa-exit-buffer)
     keymap))
 
 (defvar epa-info-mode-map
@@ -238,22 +246,32 @@ the separate window."
          (epg-sub-key-id (car (epg-key-sub-key-list
                                (widget-get widget :value))))))
 
-(defun epa-keys-mode ()
+(if (fboundp 'encode-coding-string)
+    (defalias 'epa--encode-coding-string 'encode-coding-string)
+  (defalias 'epa--encode-coding-string 'identity))
+
+(if (fboundp 'decode-coding-string)
+    (defalias 'epa--decode-coding-string 'decode-coding-string)
+  (defalias 'epa--decode-coding-string 'identity))
+
+(defun epa-key-list-mode ()
   "Major mode for `epa-list-keys'."
   (kill-all-local-variables)
   (buffer-disable-undo)
-  (setq major-mode 'epa-keys-mode
+  (setq major-mode 'epa-key-list-mode
        mode-name "Keys"
        truncate-lines t
        buffer-read-only t)
-  (use-local-map epa-keys-mode-map)
+  (use-local-map epa-key-list-mode-map)
   (make-local-variable 'font-lock-defaults)
   (setq font-lock-defaults '(epa-font-lock-keywords t))
   ;; In XEmacs, auto-initialization of font-lock is not effective
   ;; if buffer-file-name is not set.
   (font-lock-set-defaults)
   (make-local-variable 'epa-exit-buffer-function)
-  (run-hooks 'epa-keys-mode-hook))
+  (make-local-variable 'revert-buffer-function)
+  (setq revert-buffer-function 'epa--key-list-revert-buffer)
+  (run-hooks 'epa-key-list-mode-hook))
 
 (defun epa-key-mode ()
   "Major mode for a key description."
@@ -314,49 +332,11 @@ If ARG is non-nil, mark the current line."
   (interactive)
   (funcall epa-exit-buffer-function))
 
-;;;###autoload
-(defun epa-list-keys (&optional name mode protocol)
-  (interactive
-   (if current-prefix-arg
-       (let ((name (read-string "Pattern: "
-                               (if epa-list-keys-arguments
-                                   (car epa-list-keys-arguments)))))
-        (list (if (equal name "") nil name)
-              (y-or-n-p "Secret keys? ")
-              (intern (completing-read "Protocol? "
-                                       '(("OpenPGP") ("CMS"))
-                                       nil t))))
-     (or epa-list-keys-arguments (list nil nil nil))))
-  (unless (and epa-keys-buffer
-              (buffer-live-p epa-keys-buffer))
-    (setq epa-keys-buffer (generate-new-buffer "*Keys*")))
-  (set-buffer epa-keys-buffer)
-  (let ((inhibit-read-only t)
-       buffer-read-only
-       (point (point-min))
-       (context (epg-make-context protocol)))
-    (unless (get-text-property point 'epa-list-keys)
-      (setq point (next-single-property-change point 'epa-list-keys)))
-    (when point
-      (delete-region point
-                    (or (next-single-property-change point 'epa-list-keys)
-                        (point-max)))
-      (goto-char point))
-    (epa-insert-keys context name mode)
-    (epa-keys-mode)
-    (widget-setup)
-    (set-keymap-parent (current-local-map) widget-keymap))
-  (make-local-variable 'epa-list-keys-arguments)
-  (setq epa-list-keys-arguments (list name mode protocol))
-  (goto-char (point-min))
-  (pop-to-buffer (current-buffer)))
-
-(defun epa-insert-keys (context name mode)
+(defun epa--insert-keys (keys)
   (save-excursion
     (save-restriction
       (narrow-to-region (point) (point))
-      (let ((keys (epg-list-keys context name mode))
-           point)
+      (let (point)
        (while keys
          (setq point (point))
          (insert "  ")
@@ -376,6 +356,58 @@ If ARG is non-nil, mark the current line."
                                 'start-open t
                                 'end-open t)))))
 
+(defun epa--list-keys (name secret)
+  (unless (and epa-keys-buffer
+              (buffer-live-p epa-keys-buffer))
+    (setq epa-keys-buffer (generate-new-buffer "*Keys*")))
+  (set-buffer epa-keys-buffer)
+  (epa-key-list-mode)
+  (let ((inhibit-read-only t)
+       buffer-read-only
+       (point (point-min))
+       (context (epg-make-context epa-protocol)))
+    (unless (get-text-property point 'epa-list-keys)
+      (setq point (next-single-property-change point 'epa-list-keys)))
+    (when point
+      (delete-region point
+                    (or (next-single-property-change point 'epa-list-keys)
+                        (point-max)))
+      (goto-char point))
+    (epa--insert-keys (epg-list-keys context name secret))
+    (widget-setup)
+    (set-keymap-parent (current-local-map) widget-keymap))
+  (make-local-variable 'epa-list-keys-arguments)
+  (setq epa-list-keys-arguments (list name secret))
+  (goto-char (point-min))
+  (pop-to-buffer (current-buffer)))
+
+;;;###autoload
+(defun epa-list-keys (&optional name)
+  "List all keys matched with NAME from the public keyring."
+  (interactive
+   (if current-prefix-arg
+       (let ((name (read-string "Pattern: "
+                               (if epa-list-keys-arguments
+                                   (car epa-list-keys-arguments)))))
+        (list (if (equal name "") nil name)))
+     (list nil)))
+  (epa--list-keys name nil))
+
+;;;###autoload
+(defun epa-list-secret-keys (&optional name)
+  "List all keys matched with NAME from the private keyring."
+  (interactive
+   (if current-prefix-arg
+       (let ((name (read-string "Pattern: "
+                               (if epa-list-keys-arguments
+                                   (car epa-list-keys-arguments)))))
+        (list (if (equal name "") nil name)))
+     (list nil)))
+  (epa--list-keys name t))
+
+(defun epa--key-list-revert-buffer (&optional ignore-auto noconfirm)
+  (apply #'epa--list-keys epa-list-keys-arguments))
+
 (defun epa--marked-keys ()
   (or (save-excursion
        (set-buffer epa-keys-buffer)
@@ -392,23 +424,20 @@ If ARG is non-nil, mark the current line."
          (if key
              (list key))))))
 
-;;;###autoload
-(defun epa-select-keys (context prompt &optional names secret)
-  "Display a user's keyring and ask him to select keys.
-CONTEXT is an epg-context.
-PROMPT is a string to prompt with.
-NAMES is a list of strings to be matched with keys.  If it is nil, all
-the keys are listed.
-If SECRET is non-nil, list secret keys instead of public keys."
+(defun epa--select-keys (prompt keys)
   (save-excursion
     (unless (and epa-keys-buffer
                 (buffer-live-p epa-keys-buffer))
       (setq epa-keys-buffer (generate-new-buffer "*Keys*")))
+    (set-buffer epa-keys-buffer)
+    (epa-key-list-mode)
     (let ((inhibit-read-only t)
          buffer-read-only)
-      (set-buffer epa-keys-buffer)
       (erase-buffer)
-      (insert prompt "\n")
+      (insert prompt "\n"
+             (substitute-command-keys "\
+- `\\[epa-mark]' to mark a key on the line
+- `\\[epa-unmark]' to unmark a key on the line\n"))
       (widget-create 'link
                     :notify (lambda (&rest ignore) (abort-recursive-edit))
                     :help-echo
@@ -422,20 +451,7 @@ If SECRET is non-nil, list secret keys instead of public keys."
                      "Click here or \\[exit-recursive-edit] to finish")
                     "OK")
       (insert "\n\n")
-      (if names
-         (while names
-           (epa-insert-keys context (car names) secret)
-           (if (get-text-property (point) 'epa-list-keys)
-               (epa-mark))
-           (goto-char (point-max))
-           (setq names (cdr names)))
-       (if secret
-           (progn
-             (epa-insert-keys context nil secret)
-             (if (get-text-property (point) 'epa-list-keys)
-                 (epa-mark)))
-         (epa-insert-keys context nil nil)))
-      (epa-keys-mode)
+      (epa--insert-keys keys)
       (widget-setup)
       (set-keymap-parent (current-local-map) widget-keymap)
       (setq epa-exit-buffer-function #'abort-recursive-edit)
@@ -449,6 +465,39 @@ If SECRET is non-nil, list secret keys instead of public keys."
          (delete-window (get-buffer-window epa-keys-buffer)))
       (kill-buffer epa-keys-buffer))))
 
+;;;###autoload
+(defun epa-select-keys (context prompt &optional names secret)
+  "Display a user's keyring and ask him to select keys.
+CONTEXT is an epg-context.
+PROMPT is a string to prompt with.
+NAMES is a list of strings to be matched with keys.  If it is nil, all
+the keys are listed.
+If SECRET is non-nil, list secret keys instead of public keys."
+  (let ((keys (epg-list-keys context names secret)))
+    (if (> (length keys) 1)
+       (epa--select-keys prompt keys)
+      keys)))
+
+(defun epa--format-fingerprint-1 (fingerprint unit-size block-size)
+  (let ((unit 0))
+    (with-temp-buffer
+      (insert fingerprint)
+      (goto-char (point-min))
+      (while (progn
+              (goto-char (+ (point) unit-size))
+              (not (eobp)))
+       (setq unit (1+ unit))
+       (insert (if (= (% unit block-size) 0) "  " " ")))
+      (buffer-string))))
+
+(defun epa--format-fingerprint (fingerprint)
+  (if fingerprint
+      (if (= (length fingerprint) 40)
+         ;; 1234 5678 9ABC DEF0 1234  5678 9ABC DEF0 1234 5678
+         (epa--format-fingerprint-1 fingerprint 4 5)
+       ;; 12 34 56 78 9A BC DE F0  12 34 56 78 9A BC DE F0
+       (epa--format-fingerprint-1 fingerprint 2 8))))
+
 (defun epa--show-key (key)
   (let* ((primary-sub-key (car (epg-key-sub-key-list key)))
         (entry (assoc (epg-sub-key-id primary-sub-key)
@@ -464,6 +513,7 @@ If SECRET is non-nil, list secret keys instead of public keys."
       (setcdr entry (generate-new-buffer
                     (format "*Key*%s" (epg-sub-key-id primary-sub-key)))))
     (set-buffer (cdr entry))
+    (epa-key-mode)
     (make-local-variable 'epa-key)
     (setq epa-key key)
     (erase-buffer)
@@ -512,18 +562,19 @@ If SECRET is non-nil, list secret keys instead of public keys."
                         (epg-sub-key-capability (car pointer))
                         " ")
              "\n\tFingerprint: "
-             (epg-sub-key-fingerprint (car pointer))
+             (epa--format-fingerprint (epg-sub-key-fingerprint (car pointer)))
              "\n")
       (setq pointer (cdr pointer)))
     (goto-char (point-min))
-    (pop-to-buffer (current-buffer))
-    (epa-key-mode)))
+    (pop-to-buffer (current-buffer))))
 
 (defun epa-display-info (info)
   (if epa-popup-info-window
       (save-selected-window
-       (unless epa-info-buffer
+       (unless (and epa-info-buffer (buffer-live-p epa-info-buffer))
          (setq epa-info-buffer (generate-new-buffer "*Info*")))
+       (if (get-buffer-window epa-info-buffer)
+           (delete-window (get-buffer-window epa-info-buffer)))
        (save-excursion
          (set-buffer epa-info-buffer)
          (let ((inhibit-read-only t)
@@ -560,7 +611,8 @@ If SECRET is non-nil, list secret keys instead of public keys."
 
 (defun epa-progress-callback-function (context what char current total
                                               handback)
-  (message "%s: %d%% (%d/%d)" what
+  (message "%s%d%% (%d/%d)" (or handback
+                               (concat what ": "))
           (if (> total 0) (floor (* (/ current (float total)) 100)) 0)
           current total))
 
@@ -577,14 +629,17 @@ If SECRET is non-nil, list secret keys instead of public keys."
                          ") ")
                  (file-name-directory default-name)
                  default-name)))
-        (context (epg-make-context)))
+        (context (epg-make-context epa-protocol)))
     (epg-context-set-passphrase-callback context
                                         #'epa-passphrase-callback-function)
     (epg-context-set-progress-callback context
-                                      #'epa-progress-callback-function)
+                                      #'epa-progress-callback-function
+                                      (format "Decrypting %s..."
+                                              (file-name-nondirectory file)))
     (message "Decrypting %s..." (file-name-nondirectory file))
     (epg-decrypt-file context file plain)
-    (message "Decrypting %s...done" (file-name-nondirectory file))
+    (message "Decrypting %s...wrote %s" (file-name-nondirectory file)
+            (file-name-nondirectory plain))
     (if (epg-context-result-for context 'verify)
        (epa-display-info (epg-verify-result-to-string
                           (epg-context-result-for context 'verify))))))
@@ -594,11 +649,13 @@ If SECRET is non-nil, list secret keys instead of public keys."
   "Verify FILE."
   (interactive "fFile: ")
   (setq file (expand-file-name file))
-  (let* ((context (epg-make-context))
+  (let* ((context (epg-make-context epa-protocol))
         (plain (if (equal (file-name-extension file) "sig")
                    (file-name-sans-extension file))))
     (epg-context-set-progress-callback context
-                                      #'epa-progress-callback-function)
+                                      #'epa-progress-callback-function
+                                      (format "Verifying %s..."
+                                              (file-name-nondirectory file)))
     (message "Verifying %s..." (file-name-nondirectory file))
     (epg-verify-file context file plain)
     (message "Verifying %s...done" (file-name-nondirectory file))
@@ -606,55 +663,93 @@ If SECRET is non-nil, list secret keys instead of public keys."
        (epa-display-info (epg-verify-result-to-string
                           (epg-context-result-for context 'verify))))))
 
+(defun epa--read-signature-type ()
+  (let (type c)
+    (while (null type)
+      (message "Signature type (n,c,d,?) ")
+      (setq c (read-char))
+      (cond ((eq c ?c)
+            (setq type 'clear))
+           ((eq c ?d)
+            (setq type 'detached))
+           ((eq c ??)
+            (with-output-to-temp-buffer "*Help*"
+              (save-excursion
+                (set-buffer standard-output)
+                (insert "\
+n - Create a normal signature
+c - Create a cleartext signature
+d - Create a detached signature
+? - Show this help
+"))))
+           (t
+            (setq type 'normal))))))
+
 ;;;###autoload
 (defun epa-sign-file (file signers mode)
   "Sign FILE by SIGNERS keys selected."
   (interactive
-   (list (expand-file-name (read-file-name "File: "))
-        (epa-select-keys (epg-make-context) "Select keys for signing.
+   (let ((verbose current-prefix-arg))
+     (list (expand-file-name (read-file-name "File: "))
+          (if verbose
+              (epa-select-keys (epg-make-context epa-protocol)
+                               "Select keys for signing.
 If no one is selected, default secret key is used.  "
-                         nil t)
-        (if (y-or-n-p "Make a detached signature? ")
-            'detached
-          (if (y-or-n-p "Make a cleartext signature? ")
-              'clear))))
+                               nil t))
+          (if verbose
+              (epa--read-signature-type)
+            'clear))))
   (let ((signature (concat file
-                          (if (or epa-armor
-                                  (not (memq mode '(nil t normal detached))))
-                              ".asc"
+                          (if (eq epa-protocol 'OpenPGP)
+                              (if (or epa-armor
+                                      (not (memq mode
+                                                 '(nil t normal detached))))
+                                  ".asc"
+                                (if (memq mode '(t detached))
+                                    ".sig"
+                                  ".gpg"))
                             (if (memq mode '(t detached))
-                                ".sig"
-                              ".gpg"))))
-       (context (epg-make-context)))
+                                ".p7s"
+                              ".p7m"))))
+       (context (epg-make-context epa-protocol)))
     (epg-context-set-armor context epa-armor)
     (epg-context-set-textmode context epa-textmode)
     (epg-context-set-signers context signers)
     (epg-context-set-passphrase-callback context
                                         #'epa-passphrase-callback-function)
     (epg-context-set-progress-callback context
-                                      #'epa-progress-callback-function)
+                                      #'epa-progress-callback-function
+                                      (format "Signing %s..."
+                                              (file-name-nondirectory file)))
     (message "Signing %s..." (file-name-nondirectory file))
     (epg-sign-file context file signature mode)
-    (message "Signing %s...done" (file-name-nondirectory file))))
+    (message "Signing %s...wrote %s" (file-name-nondirectory file)
+            (file-name-nondirectory signature))))
 
 ;;;###autoload
 (defun epa-encrypt-file (file recipients)
   "Encrypt FILE for RECIPIENTS."
   (interactive
    (list (expand-file-name (read-file-name "File: "))
-        (epa-select-keys (epg-make-context) "Select recipients for encryption.
+        (epa-select-keys (epg-make-context epa-protocol)
+                         "Select recipients for encryption.
 If no one is selected, symmetric encryption will be performed.  ")))
-  (let ((cipher (concat file (if epa-armor ".asc" ".gpg")))
-       (context (epg-make-context)))
+  (let ((cipher (concat file (if (eq epa-protocol 'OpenPGP)
+                                (if epa-armor ".asc" ".gpg")
+                              ".p7m")))
+       (context (epg-make-context epa-protocol)))
     (epg-context-set-armor context epa-armor)
     (epg-context-set-textmode context epa-textmode)
     (epg-context-set-passphrase-callback context
                                         #'epa-passphrase-callback-function)
     (epg-context-set-progress-callback context
-                                      #'epa-progress-callback-function)
+                                      #'epa-progress-callback-function
+                                      (format "Encrypting %s..."
+                                              (file-name-nondirectory file)))
     (message "Encrypting %s..." (file-name-nondirectory file))
     (epg-encrypt-file context file recipients cipher)
-    (message "Encrypting %s...done" (file-name-nondirectory file))))
+    (message "Encrypting %s...wrote %s" (file-name-nondirectory file)
+            (file-name-nondirectory cipher))))
 
 ;;;###autoload
 (defun epa-decrypt-region (start end)
@@ -663,22 +758,45 @@ If no one is selected, symmetric encryption will be performed.  ")))
 Don't use this command in Lisp programs!"
   (interactive "r")
   (save-excursion
-    (let ((context (epg-make-context))
+    (let ((context (epg-make-context epa-protocol))
          plain)
       (epg-context-set-passphrase-callback context
                                           #'epa-passphrase-callback-function)
       (epg-context-set-progress-callback context
-                                        #'epa-progress-callback-function)
+                                        #'epa-progress-callback-function
+                                        "Decrypting...")
       (message "Decrypting...")
       (setq plain (epg-decrypt-string context (buffer-substring start end)))
       (message "Decrypting...done")
-      (delete-region start end)
-      (goto-char start)
-      (insert (decode-coding-string plain coding-system-for-read))
+      (setq plain (epa--decode-coding-string
+                  plain
+                  (or coding-system-for-read
+                      (get-text-property start 'epa-coding-system-used))))
+      (if (y-or-n-p "Replace the original text? ")
+         (let ((inhibit-read-only t)
+               buffer-read-only)
+           (delete-region start end)
+           (goto-char start)
+           (insert plain))
+       (with-output-to-temp-buffer "*Temp*"
+         (set-buffer standard-output)
+         (insert plain)
+         (epa-info-mode)))
       (if (epg-context-result-for context 'verify)
          (epa-display-info (epg-verify-result-to-string
                             (epg-context-result-for context 'verify)))))))
 
+(defun epa--find-coding-system-for-mime-charset (mime-charset)
+  (if (featurep 'xemacs)
+      (if (fboundp 'find-coding-system)
+         (find-coding-system mime-charset))
+    (let ((pointer (coding-system-list)))
+      (while (and pointer
+                 (eq (coding-system-get (car pointer) 'mime-charset)
+                     mime-charset))
+       (setq pointer (cdr pointer)))
+      pointer)))
+
 ;;;###autoload
 (defun epa-decrypt-armor-in-region (start end)
   "Decrypt OpenPGP armors in the current region between START and END.
@@ -689,7 +807,7 @@ Don't use this command in Lisp programs!"
     (save-restriction
       (narrow-to-region start end)
       (goto-char start)
-      (let (armor-start armor-end charset coding-system)
+      (let (armor-start armor-end)
        (while (re-search-forward "-----BEGIN PGP MESSAGE-----$" nil t)
          (setq armor-start (match-beginning 0)
                armor-end (re-search-forward "^-----END PGP MESSAGE-----$"
@@ -697,15 +815,13 @@ Don't use this command in Lisp programs!"
          (unless armor-end
            (error "No armor tail"))
          (goto-char armor-start)
-         (if (re-search-forward "^Charset: \\(.*\\)" armor-end t)
-             (setq charset (match-string 1)))
-         (if coding-system-for-read
-             (setq coding-system coding-system-for-read)
-           (if charset
-               (setq coding-system (intern (downcase charset)))
-             (setq coding-system 'utf-8)))
-         (let ((coding-system-for-read coding-system))
-           (epa-decrypt-region start end)))))))
+         (let ((coding-system-for-read
+                (or coding-system-for-read
+                    (if (re-search-forward "^Charset: \\(.*\\)" armor-end t)
+                        (epa--find-coding-system-for-mime-charset
+                         (intern (downcase (match-string 1))))))))
+           (goto-char armor-end)
+           (epa-decrypt-region armor-start armor-end)))))))
 
 ;;;###autoload
 (defun epa-verify-region (start end)
@@ -713,13 +829,28 @@ Don't use this command in Lisp programs!"
 
 Don't use this command in Lisp programs!"
   (interactive "r")
-  (let ((context (epg-make-context)))
+  (let ((context (epg-make-context epa-protocol))
+       plain)
     (epg-context-set-progress-callback context
-                                      #'epa-progress-callback-function)
-    (epg-verify-string context
-                      (encode-coding-string
-                       (buffer-substring start end)
-                       coding-system-for-write))
+                                      #'epa-progress-callback-function
+                                      "Verifying...")
+    (setq plain (epg-verify-string
+                context
+                (epa--encode-coding-string
+                 (buffer-substring start end)
+                 (or coding-system-for-write
+                     (get-text-property start
+                                        'epa-coding-system-used)))))
+    (if (y-or-n-p "Replace the original text? ")
+       (let ((inhibit-read-only t)
+             buffer-read-only)
+         (delete-region start end)
+         (goto-char start)
+         (insert plain))
+       (with-output-to-temp-buffer "*Temp*"
+         (set-buffer standard-output)
+         (insert plain)
+         (epa-info-mode)))
     (if (epg-context-result-for context 'verify)
        (epa-display-info (epg-verify-result-to-string
                           (epg-context-result-for context 'verify))))))
@@ -735,19 +866,24 @@ Don't use this command in Lisp programs!"
     (save-restriction
       (narrow-to-region start end)
       (goto-char start)
-      (let (armor-start armor-end)
+      (let (cleartext-start cleartext-end)
        (while (re-search-forward "-----BEGIN PGP SIGNED MESSAGE-----$"
                                  nil t)
-         (setq armor-start (match-beginning 0))
+         (setq cleartext-start (match-beginning 0))
          (unless (re-search-forward "^-----BEGIN PGP SIGNATURE-----$"
                                           nil t)
            (error "Invalid cleartext signed message"))
-         (setq armor-end (re-search-forward
+         (setq cleartext-end (re-search-forward
                           "^-----END PGP SIGNATURE-----$"
                           nil t))
-         (unless armor-end
-           (error "No armor tail"))
-         (epa-verify-region armor-start armor-end))))))
+         (unless cleartext-end
+           (error "No cleartext tail"))
+         (epa-verify-region cleartext-start cleartext-end))))))
+
+(if (fboundp 'select-safe-coding-system)
+    (defalias 'epa--select-safe-coding-system 'select-safe-coding-system)
+  (defun epa--select-safe-coding-system (from to)
+    buffer-file-coding-system))
 
 ;;;###autoload
 (defun epa-sign-region (start end signers mode)
@@ -755,77 +891,121 @@ Don't use this command in Lisp programs!"
 
 Don't use this command in Lisp programs!"
   (interactive
-   (list (region-beginning) (region-end)
-        (epa-select-keys (epg-make-context) "Select keys for signing.
+   (let ((verbose current-prefix-arg))
+     (setq epa-last-coding-system-specified
+          (or coding-system-for-write
+              (epa--select-safe-coding-system
+               (region-beginning) (region-end))))
+     (list (region-beginning) (region-end)
+          (if verbose
+              (epa-select-keys (epg-make-context epa-protocol)
+                               "Select keys for signing.
 If no one is selected, default secret key is used.  "
-                         nil t)
-        (catch 'done
-          (while t
-            (message "Signature type (n,c,d,?) ")
-            (let ((c (read-char)))
-              (cond ((eq c ?c)
-                     (throw 'done 'clear))
-                    ((eq c ?d)
-                     (throw 'done 'detached))
-                    ((eq c ??)
-                     (with-output-to-temp-buffer "*Help*"
-                       (save-excursion
-                         (set-buffer standard-output)
-                         (insert "\
-n - Create a normal signature
-c - Create a cleartext signature
-d - Create a detached signature
-? - Show this help
-"))))
-                    (t
-                     (throw 'done nil))))))))
+                               nil t))
+          (if verbose
+              (epa--read-signature-type)
+            'clear))))
   (save-excursion
-    (let ((context (epg-make-context))
+    (let ((context (epg-make-context epa-protocol))
          signature)
-      (epg-context-set-armor context epa-armor)
-      (epg-context-set-textmode context epa-textmode)
+      ;;(epg-context-set-armor context epa-armor)
+      (epg-context-set-armor context t)
+      ;;(epg-context-set-textmode context epa-textmode)
+      (epg-context-set-textmode context t)
       (epg-context-set-signers context signers)
       (epg-context-set-passphrase-callback context
                                           #'epa-passphrase-callback-function)
       (epg-context-set-progress-callback context
-                                        #'epa-progress-callback-function)
+                                        #'epa-progress-callback-function
+                                        "Signing...")
       (message "Signing...")
       (setq signature (epg-sign-string context
-                                      (encode-coding-string
+                                      (epa--encode-coding-string
                                        (buffer-substring start end)
-                                       coding-system-for-write)
+                                       epa-last-coding-system-specified)
                                       mode))
       (message "Signing...done")
       (delete-region start end)
-      (insert (decode-coding-string signature coding-system-for-read)))))
+      (goto-char start)
+      (add-text-properties (point)
+                          (progn
+                            (insert (epa--decode-coding-string
+                                     signature
+                                     (or coding-system-for-read
+                                         epa-last-coding-system-specified)))
+                            (point))
+                          (list 'epa-coding-system-used
+                                epa-last-coding-system-specified
+                                'front-sticky nil
+                                'rear-nonsticky t
+                                'start-open t
+                                'end-open t)))))
+
+(if (fboundp 'derived-mode-p)
+    (defalias 'epa--derived-mode-p 'derived-mode-p)
+  (defun epa--derived-mode-p (&rest modes)
+    "Non-nil if the current major mode is derived from one of MODES.
+Uses the `derived-mode-parent' property of the symbol to trace backwards."
+    (let ((parent major-mode))
+      (while (and (not (memq parent modes))
+                 (setq parent (get parent 'derived-mode-parent))))
+      parent)))
 
 ;;;###autoload
-(defun epa-encrypt-region (start end recipients)
+(defun epa-encrypt-region (start end recipients sign signers)
   "Encrypt the current region between START and END for RECIPIENTS.
 
 Don't use this command in Lisp programs!"
   (interactive
-   (list (region-beginning) (region-end)
-        (epa-select-keys (epg-make-context) "Select recipients for encryption.
-If no one is selected, symmetric encryption will be performed.  ")))
+   (let ((verbose current-prefix-arg)
+        (context (epg-make-context epa-protocol))
+        sign)
+     (setq epa-last-coding-system-specified
+          (or coding-system-for-write
+              (epa--select-safe-coding-system
+               (region-beginning) (region-end))))
+     (list (region-beginning) (region-end)
+          (epa-select-keys context
+                           "Select recipients for encryption.
+If no one is selected, symmetric encryption will be performed.  ")
+          (setq sign (if verbose (y-or-n-p "Sign? ")))
+          (if sign
+              (epa-select-keys context
+                               "Select keys for signing.  ")))))
   (save-excursion
-    (let ((context (epg-make-context))
+    (let ((context (epg-make-context epa-protocol))
          cipher)
-      (epg-context-set-armor context epa-armor)
-      (epg-context-set-textmode context epa-textmode)
+      ;;(epg-context-set-armor context epa-armor)
+      (epg-context-set-armor context t)
+      ;;(epg-context-set-textmode context epa-textmode)
+      (epg-context-set-textmode context t)
+      (if sign
+         (epg-context-set-signers context signers))
       (epg-context-set-passphrase-callback context
                                           #'epa-passphrase-callback-function)
       (epg-context-set-progress-callback context
-                                        #'epa-progress-callback-function)
+                                        #'epa-progress-callback-function
+                                        "Encrypting...")
       (message "Encrypting...")
       (setq cipher (epg-encrypt-string context
-                                      (encode-coding-string
+                                      (epa--encode-coding-string
                                        (buffer-substring start end)
-                                       coding-system-for-write)
-                                      recipients))
+                                       epa-last-coding-system-specified)
+                                      recipients
+                                      sign))
       (message "Encrypting...done")
       (delete-region start end)
-      (insert cipher))))
+      (goto-char start)
+      (add-text-properties (point)
+                          (progn
+                            (insert cipher)
+                            (point))
+                          (list 'epa-coding-system-used
+                                epa-last-coding-system-specified
+                                'front-sticky nil
+                                'rear-nonsticky t
+                                'start-open t
+                                'end-open t)))))
 
 ;;;###autoload
 (defun epa-delete-keys (keys &optional allow-secret)
@@ -838,7 +1018,7 @@ Don't use this command in Lisp programs!"
        (error "No keys selected"))
      (list keys
           (eq (nth 1 epa-list-keys-arguments) t))))
-  (let ((context (epg-make-context)))
+  (let ((context (epg-make-context epa-protocol)))
     (message "Deleting...")
     (epg-delete-keys context keys allow-secret)
     (message "Deleting...done")
@@ -851,7 +1031,7 @@ Don't use this command in Lisp programs!"
 Don't use this command in Lisp programs!"
   (interactive "fFile: ")
   (setq file (expand-file-name file))
-  (let ((context (epg-make-context)))
+  (let ((context (epg-make-context epa-protocol)))
     (message "Importing %s..." (file-name-nondirectory file))
     (condition-case nil
        (progn
@@ -862,10 +1042,51 @@ Don't use this command in Lisp programs!"
     (if (epg-context-result-for context 'import)
        (epa-display-info (epg-import-result-to-string
                           (epg-context-result-for context 'import))))
-    (if (eq major-mode 'epa-keys-mode)
+    (if (eq major-mode 'epa-key-list-mode)
        (apply #'epa-list-keys epa-list-keys-arguments))))
 
 ;;;###autoload
+(defun epa-import-keys-region (start end)
+  "Import keys from the region.
+
+Don't use this command in Lisp programs!"
+  (interactive "r")
+  (let ((context (epg-make-context epa-protocol)))
+    (message "Importing...")
+    (condition-case nil
+       (progn
+         (epg-import-keys-from-string context (buffer-substring start end))
+         (message "Importing...done"))
+      (error
+       (message "Importing...failed")))
+    (if (epg-context-result-for context 'import)
+       (epa-display-info (epg-import-result-to-string
+                          (epg-context-result-for context 'import))))))
+
+;;;###autoload
+(defun epa-import-armor-in-region (start end)
+  "Import keys in the OpenPGP armor format in the current region
+between START and END.
+
+Don't use this command in Lisp programs!"
+  (interactive "r")
+  (save-excursion
+    (save-restriction
+      (narrow-to-region start end)
+      (goto-char start)
+      (let (armor-start armor-end)
+       (while (re-search-forward
+               "-----BEGIN \\(PGP \\(PUBLIC\\|PRIVATE\\) KEY BLOCK\\)-----$"
+               nil t)
+         (setq armor-start (match-beginning 0)
+               armor-end (re-search-forward
+                          (concat "^-----END " (match-string 1) "-----$")
+                          nil t))
+         (unless armor-end
+           (error "No armor tail"))
+         (epa-import-keys-region armor-start armor-end))))))
+
+;;;###autoload
 (defun epa-export-keys (keys file)
   "Export selected KEYS to FILE.
 
@@ -888,13 +1109,26 @@ Don't use this command in Lisp programs!"
                     ") ")
             (file-name-directory default-name)
             default-name)))))
-  (let ((context (epg-make-context)))
+  (let ((context (epg-make-context epa-protocol)))
     (epg-context-set-armor context epa-armor)
     (message "Exporting to %s..." (file-name-nondirectory file))
     (epg-export-keys-to-file context keys file)
     (message "Exporting to %s...done" (file-name-nondirectory file))))
 
 ;;;###autoload
+(defun epa-insert-keys (keys)
+  "Insert selected KEYS after the point.
+
+Don't use this command in Lisp programs!"
+  (interactive
+   (list (epa-select-keys (epg-make-context epa-protocol)
+                         "Select keys to export.  ")))
+  (let ((context (epg-make-context epa-protocol)))
+    ;;(epg-context-set-armor context epa-armor)
+    (epg-context-set-armor context t)
+    (insert (epg-export-keys-to-string context keys))))
+
+;;;###autoload
 (defun epa-sign-keys (keys &optional local)
   "Sign selected KEYS.
 If a prefix-arg is specified, the signature is marked as non exportable.
@@ -905,11 +1139,12 @@ Don't use this command in Lisp programs!"
      (unless keys
        (error "No keys selected"))
      (list keys current-prefix-arg)))
-  (let ((context (epg-make-context)))
+  (let ((context (epg-make-context epa-protocol)))
     (epg-context-set-passphrase-callback context
                                         #'epa-passphrase-callback-function)
     (epg-context-set-progress-callback context
-                                      #'epa-progress-callback-function)
+                                      #'epa-progress-callback-function
+                                      "Signing keys...")
     (message "Signing keys...")
     (epg-sign-keys context keys local)
     (message "Signing keys...done")))