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

1 files changed, 453 insertions, 0 deletions

diff --git a/lisp/pgg.el b/lisp/pgg.el
new file mode 100644
index 00000000000..af59833c6c0
--- /dev/null
+++ b/lisp/pgg.el
@@ -0,0 +1,453 @@
+;;; pgg.el --- glue for the various PGP implementations.
+
+;; Copyright (C) 1999, 2000, 2002, 2003, 2004,
+;;   2005 Free Software Foundation, Inc.
+
+;; Author: Daiki Ueno <ueno@unixuser.org>
+;; Created: 1999/10/28
+;; Keywords: PGP
+
+;; 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.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'pgg-def)
+(require 'pgg-parse)
+(autoload 'run-at-time "timer")
+
+;; Don't merge these two `eval-when-compile's.
+(eval-when-compile
+  (require 'cl))
+
+;;; @ utility functions
+;;;
+
+(defun pgg-invoke (func scheme &rest args)
+  (progn
+    (require (intern (format "pgg-%s" scheme)))
+    (apply 'funcall (intern (format "pgg-%s-%s" scheme func)) args)))
+
+(put 'pgg-save-coding-system 'lisp-indent-function 2)
+
+(defmacro pgg-save-coding-system (start end &rest body)
+  `(if (interactive-p)
+       (let ((buffer (current-buffer)))
+	 (with-temp-buffer
+	   (let (buffer-undo-list)
+	     (insert-buffer-substring buffer ,start ,end)
+	     (encode-coding-region (point-min)(point-max)
+				   buffer-file-coding-system)
+	     (prog1 (save-excursion ,@body)
+	       (push nil buffer-undo-list)
+	       (ignore-errors (undo))))))
+     (save-restriction
+       (narrow-to-region ,start ,end)
+       ,@body)))
+
+(defun pgg-temp-buffer-show-function (buffer)
+  (let ((window (or (get-buffer-window buffer 'visible)
+		    (split-window-vertically))))
+    (set-window-buffer window buffer)
+    (shrink-window-if-larger-than-buffer window)))
+
+(defun pgg-display-output-buffer (start end status)
+  (if status
+      (progn
+	(delete-region start end)
+	(insert-buffer-substring pgg-output-buffer)
+	(decode-coding-region start (point) buffer-file-coding-system))
+    (let ((temp-buffer-show-function
+	   (function pgg-temp-buffer-show-function)))
+      (with-output-to-temp-buffer pgg-echo-buffer
+	(set-buffer standard-output)
+	(insert-buffer-substring pgg-errors-buffer)))))
+
+(defvar pgg-passphrase-cache (make-vector 7 0))
+
+(defun pgg-read-passphrase (prompt &optional key)
+  (or (and pgg-cache-passphrase
+	   key (setq key (pgg-truncate-key-identifier key))
+	   (symbol-value (intern-soft key pgg-passphrase-cache)))
+      (read-passwd prompt)))
+
+(eval-when-compile
+  (defmacro pgg-run-at-time-1 (time repeat function args)
+    (when (featurep 'xemacs)
+      (if (condition-case nil
+	      (let ((delete-itimer 'delete-itimer)
+		    (itimer-driver-start 'itimer-driver-start)
+		    (itimer-value 'itimer-value)
+		    (start-itimer 'start-itimer))
+		(unless (or (symbol-value 'itimer-process)
+			    (symbol-value 'itimer-timer))
+		  (funcall itimer-driver-start))
+		;; Check whether there is a bug to which the difference of
+		;; the present time and the time when the itimer driver was
+		;; woken up is subtracted from the initial itimer value.
+		(let* ((inhibit-quit t)
+		       (ctime (current-time))
+		       (itimer-timer-last-wakeup
+			(prog1
+			    ctime
+			  (setcar ctime (1- (car ctime)))))
+		       (itimer-list nil)
+		       (itimer (funcall start-itimer "pgg-run-at-time"
+					'ignore 5)))
+		  (sleep-for 0.1) ;; Accept the timeout interrupt.
+		  (prog1
+		      (> (funcall itimer-value itimer) 0)
+		    (funcall delete-itimer itimer))))
+	    (error nil))
+	  `(let ((time ,time))
+	     (apply #'start-itimer "pgg-run-at-time"
+		    ,function (if time (max time 1e-9) 1e-9)
+		    ,repeat nil t ,args)))
+      `(let ((time ,time)
+	     (itimers (list nil)))
+	 (setcar
+	  itimers
+	  (apply #'start-itimer "pgg-run-at-time"
+		 (lambda (itimers repeat function &rest args)
+		   (let ((itimer (car itimers)))
+		     (if repeat
+			 (progn
+			   (set-itimer-function
+			    itimer
+			    (lambda (itimer repeat function &rest args)
+			      (set-itimer-restart itimer repeat)
+			      (set-itimer-function itimer function)
+			      (set-itimer-function-arguments itimer args)
+			      (apply function args)))
+			   (set-itimer-function-arguments
+			    itimer
+			    (append (list itimer repeat function) args)))
+		       (set-itimer-function
+			itimer
+			(lambda (itimer function &rest args)
+			  (delete-itimer itimer)
+			  (apply function args)))
+		       (set-itimer-function-arguments
+			itimer
+			(append (list itimer function) args)))))
+		 1e-9 (if time (max time 1e-9) 1e-9)
+		 nil t itimers ,repeat ,function ,args))))))
+
+(eval-and-compile
+  (if (featurep 'xemacs)
+      (defun pgg-run-at-time (time repeat function &rest args)
+	"Emulating function run as `run-at-time'.
+TIME should be nil meaning now, or a number of seconds from now.
+Return an itimer object which can be used in either `delete-itimer'
+or `cancel-timer'."
+	(pgg-run-at-time-1 time repeat function args))
+    (defalias 'pgg-run-at-time 'run-at-time)))
+
+(defun pgg-add-passphrase-cache (key passphrase)
+  (setq key (pgg-truncate-key-identifier key))
+  (set (intern key pgg-passphrase-cache)
+       passphrase)
+  (pgg-run-at-time pgg-passphrase-cache-expiry nil
+		   #'pgg-remove-passphrase-cache
+		   key))
+
+(defun pgg-remove-passphrase-cache (key)
+  (let ((passphrase (symbol-value (intern-soft key pgg-passphrase-cache))))
+    (when passphrase
+      (fillarray passphrase ?_)
+      (unintern key pgg-passphrase-cache))))
+
+(defmacro pgg-convert-lbt-region (start end lbt)
+  `(let ((pgg-conversion-end (set-marker (make-marker) ,end)))
+     (goto-char ,start)
+     (case ,lbt
+       (CRLF
+	(while (progn
+		 (end-of-line)
+		 (> (marker-position pgg-conversion-end) (point)))
+	  (insert "\r")
+	  (forward-line 1)))
+       (LF
+	(while (re-search-forward "\r$" pgg-conversion-end t)
+	  (replace-match ""))))))
+
+(put 'pgg-as-lbt 'lisp-indent-function 3)
+
+(defmacro pgg-as-lbt (start end lbt &rest body)
+  `(let ((inhibit-read-only t)
+	 buffer-read-only
+	 buffer-undo-list)
+     (pgg-convert-lbt-region ,start ,end ,lbt)
+     (let ((,end (point)))
+       ,@body)
+     (push nil buffer-undo-list)
+     (ignore-errors (undo))))
+
+(put 'pgg-process-when-success 'lisp-indent-function 0)
+
+(defmacro pgg-process-when-success (&rest body)
+  `(with-current-buffer pgg-output-buffer
+     (if (zerop (buffer-size)) nil ,@body t)))
+
+(defalias 'pgg-make-temp-file
+  (if (fboundp 'make-temp-file)
+      'make-temp-file
+    (lambda (prefix &optional dir-flag)
+      (let ((file (expand-file-name
+		   (make-temp-name prefix)
+		   (if (fboundp 'temp-directory)
+		       (temp-directory)
+		     temporary-file-directory))))
+	(if dir-flag
+	    (make-directory file))
+	file))))
+
+;;; @ interface functions
+;;;
+
+;;;###autoload
+(defun pgg-encrypt-region (start end rcpts &optional sign)
+  "Encrypt the current region between START and END for RCPTS.
+If optional argument SIGN is non-nil, do a combined sign and encrypt."
+  (interactive
+   (list (region-beginning)(region-end)
+	 (split-string (read-string "Recipients: ") "[ \t,]+")))
+  (let ((status
+	 (pgg-save-coding-system start end
+	   (pgg-invoke "encrypt-region" (or pgg-scheme pgg-default-scheme)
+		       (point-min) (point-max) rcpts sign))))
+    (when (interactive-p)
+      (pgg-display-output-buffer start end status))
+    status))
+
+;;;###autoload
+(defun pgg-encrypt (rcpts &optional sign start end)
+  "Encrypt the current buffer for RCPTS.
+If optional argument SIGN is non-nil, do a combined sign and encrypt.
+If optional arguments START and END are specified, only encrypt within
+the region."
+  (interactive (list (split-string (read-string "Recipients: ") "[ \t,]+")))
+  (let* ((start (or start (point-min)))
+	 (end (or end (point-max)))
+	 (status (pgg-encrypt-region start end rcpts sign)))
+    (when (interactive-p)
+      (pgg-display-output-buffer start end status))
+    status))
+
+;;;###autoload
+(defun pgg-decrypt-region (start end)
+  "Decrypt the current region between START and END."
+  (interactive "r")
+  (let* ((buf (current-buffer))
+	 (status
+	  (pgg-save-coding-system start end
+	    (pgg-invoke "decrypt-region" (or pgg-scheme pgg-default-scheme)
+			(point-min) (point-max)))))
+    (when (interactive-p)
+      (pgg-display-output-buffer start end status))
+    status))
+
+;;;###autoload
+(defun pgg-decrypt (&optional start end)
+  "Decrypt the current buffer.
+If optional arguments START and END are specified, only decrypt within
+the region."
+  (interactive "")
+  (let* ((start (or start (point-min)))
+	 (end (or end (point-max)))
+	 (status (pgg-decrypt-region start end)))
+    (when (interactive-p)
+      (pgg-display-output-buffer start end status))
+    status))
+
+;;;###autoload
+(defun pgg-sign-region (start end &optional cleartext)
+  "Make the signature from text between START and END.
+If the optional 3rd argument CLEARTEXT is non-nil, it does not create
+a detached signature.
+If this function is called interactively, CLEARTEXT is enabled
+and the the output is displayed."
+  (interactive "r")
+  (let ((status (pgg-save-coding-system start end
+		  (pgg-invoke "sign-region" (or pgg-scheme pgg-default-scheme)
+			      (point-min) (point-max)
+			      (or (interactive-p) cleartext)))))
+    (when (interactive-p)
+      (pgg-display-output-buffer start end status))
+    status))
+
+;;;###autoload
+(defun pgg-sign (&optional cleartext start end)
+  "Sign the current buffer.
+If the optional argument CLEARTEXT is non-nil, it does not create a
+detached signature.
+If optional arguments START and END are specified, only sign data
+within the region.
+If this function is called interactively, CLEARTEXT is enabled
+and the the output is displayed."
+  (interactive "")
+  (let* ((start (or start (point-min)))
+	 (end (or end (point-max)))
+	 (status (pgg-sign-region start end (or (interactive-p) cleartext))))
+    (when (interactive-p)
+      (pgg-display-output-buffer start end status))
+    status))
+  
+;;;###autoload
+(defun pgg-verify-region (start end &optional signature fetch)
+  "Verify the current region between START and END.
+If the optional 3rd argument SIGNATURE is non-nil, it is treated as
+the detached signature of the current region.
+
+If the optional 4th argument FETCH is non-nil, we attempt to fetch the
+signer's public key from `pgg-default-keyserver-address'."
+  (interactive "r")
+  (let* ((packet
+	  (if (null signature) nil
+	    (with-temp-buffer
+	      (buffer-disable-undo)
+	      (if (fboundp 'set-buffer-multibyte)
+		  (set-buffer-multibyte nil))
+	      (insert-file-contents signature)
+	      (cdr (assq 2 (pgg-decode-armor-region
+			    (point-min)(point-max)))))))
+	 (key (cdr (assq 'key-identifier packet)))
+	 status keyserver)
+    (and (stringp key)
+	 pgg-query-keyserver
+	 (setq key (concat "0x" (pgg-truncate-key-identifier key)))
+	 (null (pgg-lookup-key key))
+	 (or fetch (interactive-p))
+	 (y-or-n-p (format "Key %s not found; attempt to fetch? " key))
+	 (setq keyserver
+	       (or (cdr (assq 'preferred-key-server packet))
+		   pgg-default-keyserver-address))
+	 (pgg-fetch-key keyserver key))
+    (setq status 
+	  (pgg-save-coding-system start end
+	    (pgg-invoke "verify-region" (or pgg-scheme pgg-default-scheme)
+			(point-min) (point-max) signature)))
+    (when (interactive-p)
+      (let ((temp-buffer-show-function
+	     (function pgg-temp-buffer-show-function)))
+	(with-output-to-temp-buffer pgg-echo-buffer
+	  (set-buffer standard-output)
+	  (insert-buffer-substring (if status pgg-output-buffer
+				     pgg-errors-buffer)))))
+    status))
+
+;;;###autoload
+(defun pgg-verify (&optional signature fetch start end)
+  "Verify the current buffer.
+If the optional argument SIGNATURE is non-nil, it is treated as
+the detached signature of the current region.
+If the optional argument FETCH is non-nil, we attempt to fetch the
+signer's public key from `pgg-default-keyserver-address'.
+If optional arguments START and END are specified, only verify data
+within the region."
+  (interactive "")
+  (let* ((start (or start (point-min)))
+	 (end (or end (point-max)))
+	 (status (pgg-verify-region start end signature fetch)))
+    (when (interactive-p)
+      (let ((temp-buffer-show-function
+	     (function pgg-temp-buffer-show-function)))
+	(with-output-to-temp-buffer pgg-echo-buffer
+	  (set-buffer standard-output)
+	  (insert-buffer-substring (if status pgg-output-buffer
+				     pgg-errors-buffer)))))
+    status))
+
+;;;###autoload
+(defun pgg-insert-key ()
+  "Insert the ASCII armored public key."
+  (interactive)
+  (pgg-invoke "insert-key" (or pgg-scheme pgg-default-scheme)))
+
+;;;###autoload
+(defun pgg-snarf-keys-region (start end)
+  "Import public keys in the current region between START and END."
+  (interactive "r")
+  (pgg-save-coding-system start end
+    (pgg-invoke "snarf-keys-region" (or pgg-scheme pgg-default-scheme)
+		start end)))
+
+;;;###autoload
+(defun pgg-snarf-keys ()
+  "Import public keys in the current buffer."
+  (interactive "")
+  (pgg-snarf-keys-region (point-min) (point-max)))
+
+(defun pgg-lookup-key (string &optional type)
+  (pgg-invoke "lookup-key" (or pgg-scheme pgg-default-scheme) string type))
+
+(defvar pgg-insert-url-function  (function pgg-insert-url-with-w3))
+
+(defun pgg-insert-url-with-w3 (url)
+  (ignore-errors
+    (require 'url)
+    (let (buffer-file-name)
+      (url-insert-file-contents url))))
+
+(defvar pgg-insert-url-extra-arguments nil)
+(defvar pgg-insert-url-program nil)
+
+(defun pgg-insert-url-with-program (url)
+  (let ((args (copy-sequence pgg-insert-url-extra-arguments))
+	process)
+    (insert
+     (with-temp-buffer
+       (setq process
+	     (apply #'start-process " *PGG url*" (current-buffer)
+		    pgg-insert-url-program (nconc args (list url))))
+       (set-process-sentinel process #'ignore)
+       (while (eq 'run (process-status process))
+	 (accept-process-output process 5))
+       (delete-process process)
+       (if (and process (eq 'run (process-status process)))
+	   (interrupt-process process))
+       (buffer-string)))))
+
+(defun pgg-fetch-key (keyserver key)
+  "Attempt to fetch a KEY from KEYSERVER for addition to PGP or GnuPG keyring."
+  (with-current-buffer (get-buffer-create pgg-output-buffer)
+    (buffer-disable-undo)
+    (erase-buffer)
+    (let ((proto (if (string-match "^[a-zA-Z\\+\\.\\\\-]+:" keyserver)
+		     (substring keyserver 0 (1- (match-end 0))))))
+      (save-excursion
+	(funcall pgg-insert-url-function
+		 (if proto keyserver
+		   (format "http://%s:11371/pks/lookup?op=get&search=%s"
+			   keyserver key))))
+      (when (re-search-forward "^-+BEGIN" nil 'last)
+	(delete-region (point-min) (match-beginning 0))
+	(when (re-search-forward "^-+END" nil t)
+	  (delete-region (progn (end-of-line) (point))
+			 (point-max)))
+	(insert "\n")
+	(with-temp-buffer
+	  (insert-buffer-substring pgg-output-buffer)
+	  (pgg-snarf-keys-region (point-min)(point-max)))))))
+
+
+(provide 'pgg)
+
+;;; arch-tag: 9cc705dd-1e6a-4c90-8dce-c3561f9a2cf4
+;;; pgg.el ends here