Moved pgg*.el files from lisp/gnus to lisp.

1 files changed, 275 insertions, 0 deletions

diff --git a/lisp/pgg-gpg.el b/lisp/pgg-gpg.el
new file mode 100644
index 00000000000..6ba017c731c
--- /dev/null
+++ b/lisp/pgg-gpg.el
@@ -0,0 +1,275 @@
+;;; pgg-gpg.el --- GnuPG support for PGG.
+
+;; Copyright (C) 1999, 2000, 2002, 2003, 2004,
+;;   2005 Free Software Foundation, Inc.
+
+;; Author: Daiki Ueno <ueno@unixuser.org>
+;; Created: 1999/10/28
+;; Keywords: PGP, OpenPGP, GnuPG
+
+;; 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 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., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Code:
+
+(eval-when-compile
+  (require 'cl)				; for gpg macros
+  (require 'pgg))
+
+(defgroup pgg-gpg ()
+  "GnuPG interface."
+  :group 'pgg)
+
+(defcustom pgg-gpg-program "gpg"
+  "The GnuPG executable."
+  :group 'pgg-gpg
+  :type 'string)
+
+(defcustom pgg-gpg-extra-args nil
+  "Extra arguments for every GnuPG invocation."
+  :group 'pgg-gpg
+  :type '(repeat (string :tag "Argument")))
+
+(defcustom pgg-gpg-recipient-argument "--recipient"
+  "GnuPG option to specify recipient."
+  :group 'pgg-gpg
+  :type '(choice (const :tag "New `--recipient' option" "--recipient")
+		 (const :tag "Old `--remote-user' option" "--remote-user")))
+
+(defvar pgg-gpg-user-id nil
+  "GnuPG ID of your default identity.")
+
+(defun pgg-gpg-process-region (start end passphrase program args)
+  (let* ((output-file-name (pgg-make-temp-file "pgg-output"))
+	 (args
+	  `("--status-fd" "2"
+	    ,@(if passphrase '("--passphrase-fd" "0"))
+	    "--yes" ; overwrite
+	    "--output" ,output-file-name
+	    ,@pgg-gpg-extra-args ,@args))
+	 (output-buffer pgg-output-buffer)
+	 (errors-buffer pgg-errors-buffer)
+	 (orig-mode (default-file-modes))
+	 (process-connection-type nil)
+	 exit-status)
+    (with-current-buffer (get-buffer-create errors-buffer)
+      (buffer-disable-undo)
+      (erase-buffer))
+    (unwind-protect
+	(progn
+	  (set-default-file-modes 448)
+	  (let ((coding-system-for-write 'binary)
+		(input (buffer-substring-no-properties start end))
+		(default-enable-multibyte-characters nil))
+	    (with-temp-buffer
+	      (when passphrase
+		(insert passphrase "\n"))
+	      (insert input)
+	      (setq exit-status
+		    (apply #'call-process-region (point-min) (point-max) program
+			   nil errors-buffer nil args))))
+	  (with-current-buffer (get-buffer-create output-buffer)
+	    (buffer-disable-undo)
+	    (erase-buffer)
+	    (if (file-exists-p output-file-name)
+		(let ((coding-system-for-read 'raw-text-dos))
+		  (insert-file-contents output-file-name)))
+	    (set-buffer errors-buffer)
+	    (if (not (equal exit-status 0))
+		(insert (format "\n%s exited abnormally: '%s'\n"
+				program exit-status)))))
+      (if (file-exists-p output-file-name)
+	  (delete-file output-file-name))
+      (set-default-file-modes orig-mode))))
+
+(defun pgg-gpg-possibly-cache-passphrase (passphrase &optional key)
+  (if (and pgg-cache-passphrase
+	   (progn
+	     (goto-char (point-min))
+	     (re-search-forward "^\\[GNUPG:] \\(GOOD_PASSPHRASE\\>\\)\\|\\(SIG_CREATED\\)" nil t)))
+      (pgg-add-passphrase-cache
+       (or key
+	   (progn
+	     (goto-char (point-min))
+	     (if (re-search-forward
+		  "^\\[GNUPG:] NEED_PASSPHRASE\\(_PIN\\)? \\w+ ?\\w*" nil t)
+		 (substring (match-string 0) -8))))
+       passphrase)))
+
+(defvar pgg-gpg-all-secret-keys 'unknown)
+
+(defun pgg-gpg-lookup-all-secret-keys ()
+  "Return all secret keys present in secret key ring."
+  (when (eq pgg-gpg-all-secret-keys 'unknown)
+    (setq pgg-gpg-all-secret-keys '())
+    (let ((args (list "--with-colons" "--no-greeting" "--batch"
+		      "--list-secret-keys")))
+      (with-temp-buffer
+	(apply #'call-process pgg-gpg-program nil t nil args)
+	(goto-char (point-min))
+	(while (re-search-forward
+		"^\\(sec\\|pub\\):[^:]*:[^:]*:[^:]*:\\([^:]*\\)" nil t)
+	  (push (substring (match-string 2) 8)
+		pgg-gpg-all-secret-keys)))))
+  pgg-gpg-all-secret-keys)
+
+(defun pgg-gpg-lookup-key (string &optional type)
+  "Search keys associated with STRING."
+  (let ((args (list "--with-colons" "--no-greeting" "--batch"
+		    (if type "--list-secret-keys" "--list-keys")
+		    string)))
+    (with-temp-buffer
+      (apply #'call-process pgg-gpg-program nil t nil args)
+      (goto-char (point-min))
+      (if (re-search-forward "^\\(sec\\|pub\\):[^:]*:[^:]*:[^:]*:\\([^:]*\\)"
+			     nil t)
+	  (substring (match-string 2) 8)))))
+
+(defun pgg-gpg-encrypt-region (start end recipients &optional sign)
+  "Encrypt the current region between START and END.
+If optional argument SIGN is non-nil, do a combined sign and encrypt."
+  (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
+	 (passphrase
+	  (when sign
+	    (pgg-read-passphrase
+	     (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
+	     pgg-gpg-user-id)))
+	 (args
+	  (append
+	   (list "--batch" "--armor" "--always-trust" "--encrypt")
+	   (if sign (list "--sign" "--local-user" pgg-gpg-user-id))
+	   (if recipients
+	       (apply #'nconc
+		      (mapcar (lambda (rcpt)
+				(list pgg-gpg-recipient-argument rcpt))
+			      (append recipients
+				      (if pgg-encrypt-for-me
+					  (list pgg-gpg-user-id)))))))))
+    (pgg-as-lbt start end 'CRLF
+      (pgg-gpg-process-region start end passphrase pgg-gpg-program args))
+    (when sign
+      (with-current-buffer pgg-errors-buffer
+	;; Possibly cache passphrase under, e.g. "jas", for future sign.
+	(pgg-gpg-possibly-cache-passphrase passphrase pgg-gpg-user-id)
+	;; Possibly cache passphrase under, e.g. B565716F, for future decrypt.
+	(pgg-gpg-possibly-cache-passphrase passphrase)))
+    (pgg-process-when-success)))
+
+(defun pgg-gpg-decrypt-region (start end)
+  "Decrypt the current region between START and END."
+  (let* ((current-buffer (current-buffer))
+	 (message-keys (with-temp-buffer
+			 (insert-buffer-substring current-buffer)
+			 (pgg-decode-armor-region (point-min) (point-max))))
+	 (secret-keys (pgg-gpg-lookup-all-secret-keys))
+	 (key (pgg-gpg-select-matching-key message-keys secret-keys))
+	 (pgg-gpg-user-id (or key pgg-gpg-user-id pgg-default-user-id))
+	 (passphrase
+	  (pgg-read-passphrase
+	   (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
+	   pgg-gpg-user-id))
+	 (args '("--batch" "--decrypt")))
+    (pgg-gpg-process-region start end passphrase pgg-gpg-program args)
+    (with-current-buffer pgg-errors-buffer
+      (pgg-gpg-possibly-cache-passphrase passphrase pgg-gpg-user-id)
+      (goto-char (point-min))
+      (re-search-forward "^\\[GNUPG:] DECRYPTION_OKAY\\>" nil t))))
+
+(defun pgg-gpg-select-matching-key (message-keys secret-keys)
+  "Choose a key from MESSAGE-KEYS that matches one of the keys in SECRET-KEYS."
+  (loop for message-key in message-keys
+	for message-key-id = (and (equal (car message-key) 1)
+				  (cdr (assq 'key-identifier message-key)))
+	for key = (and message-key-id (pgg-lookup-key message-key-id 'encrypt))
+	when (and key (member key secret-keys)) return key))
+
+(defun pgg-gpg-sign-region (start end &optional cleartext)
+  "Make detached signature from text between START and END."
+  (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
+	 (passphrase
+	  (pgg-read-passphrase
+	   (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
+	   pgg-gpg-user-id))
+	 (args
+	  (list (if cleartext "--clearsign" "--detach-sign")
+		"--armor" "--batch" "--verbose"
+		"--local-user" pgg-gpg-user-id))
+	 (inhibit-read-only t)
+	 buffer-read-only)
+    (pgg-as-lbt start end 'CRLF
+      (pgg-gpg-process-region start end passphrase pgg-gpg-program args))
+    (with-current-buffer pgg-errors-buffer
+      ;; Possibly cache passphrase under, e.g. "jas", for future sign.
+      (pgg-gpg-possibly-cache-passphrase passphrase pgg-gpg-user-id)
+      ;; Possibly cache passphrase under, e.g. B565716F, for future decrypt.
+      (pgg-gpg-possibly-cache-passphrase passphrase))
+    (pgg-process-when-success)))
+
+(defun pgg-gpg-verify-region (start end &optional signature)
+  "Verify region between START and END as the detached signature SIGNATURE."
+  (let ((args '("--batch" "--verify")))
+    (when (stringp signature)
+      (setq args (append args (list signature))))
+    (setq args (append args '("-")))
+    (pgg-gpg-process-region start end nil pgg-gpg-program args)
+    (with-current-buffer pgg-errors-buffer
+      (goto-char (point-min))
+      (while (re-search-forward "^gpg: \\(.*\\)\n" nil t)
+	(with-current-buffer pgg-output-buffer
+	  (insert-buffer-substring pgg-errors-buffer
+				   (match-beginning 1) (match-end 0)))
+	(delete-region (match-beginning 0) (match-end 0)))
+      (goto-char (point-min))
+      (re-search-forward "^\\[GNUPG:] GOODSIG\\>" nil t))))
+
+(defun pgg-gpg-insert-key ()
+  "Insert public key at point."
+  (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
+	 (args (list "--batch" "--export" "--armor"
+		     pgg-gpg-user-id)))
+    (pgg-gpg-process-region (point)(point) nil pgg-gpg-program args)
+    (insert-buffer-substring pgg-output-buffer)))
+
+(defun pgg-gpg-snarf-keys-region (start end)
+  "Add all public keys in region between START and END to the keyring."
+  (let ((args '("--import" "--batch" "-")) status)
+    (pgg-gpg-process-region start end nil pgg-gpg-program args)
+    (set-buffer pgg-errors-buffer)
+    (goto-char (point-min))
+    (when (re-search-forward "^\\[GNUPG:] IMPORT_RES\\>" nil t)
+      (setq status (buffer-substring (match-end 0)
+				     (progn (end-of-line)(point)))
+	    status (vconcat (mapcar #'string-to-number (split-string status))))
+      (erase-buffer)
+      (insert (format "Imported %d key(s).
+\tArmor contains %d key(s) [%d bad, %d old].\n"
+		      (+ (aref status 2)
+			 (aref status 10))
+		      (aref status 0)
+		      (aref status 1)
+		      (+ (aref status 4)
+			 (aref status 11)))
+	      (if (zerop (aref status 9))
+		  ""
+		"\tSecret keys are imported.\n")))
+    (append-to-buffer pgg-output-buffer (point-min)(point-max))
+    (pgg-process-when-success)))
+
+(provide 'pgg-gpg)
+
+;;; arch-tag: 2aa5d5d8-93a0-4865-9312-33e29830e000
+;;; pgg-gpg.el ends here