-;;; epa-file.el --- the EasyPG Assistant hooks for transparent file encryption
+;;; epa-file.el --- the EasyPG Assistant, transparent file encryption
;; Copyright (C) 2006 Daiki Ueno
;; Author: Daiki Ueno <ueno@unixuser.org>
"Regexp which matches filenames to be encrypted with GnuPG."
:type 'regexp
:group 'epa-file)
+
+(defvar epa-file-handler
+ (cons epa-file-name-regexp 'epa-file-handler))
-(defvar epa-passphrase-alist nil)
+(defvar epa-file-passphrase-alist nil)
-(defun epa-file-passphrase-callback-function (key-id buffer)
+(defun epa-file-passphrase-callback-function (context key-id file)
(if (eq key-id 'SYM)
- (let ((entry (assoc buffer epa-passphrase-alist))
+ (let ((entry (assoc file epa-file-passphrase-alist))
passphrase)
- (or (cdr entry)
+ (or (copy-sequence (cdr entry))
(progn
(unless entry
- (setq entry (list buffer)
- epa-passphrase-alist (cons entry
- epa-passphrase-alist)))
- (setq passphrase (epg-passphrase-callback-function key-id nil))
+ (setq entry (list file)
+ epa-file-passphrase-alist (cons entry
+ epa-file-passphrase-alist)))
+ (setq passphrase (epg-passphrase-callback-function context
+ key-id nil))
(setcdr entry (copy-sequence passphrase))
passphrase)))
- (epg-passphrase-callback-function key-id nil)))
+ (epg-passphrase-callback-function context key-id nil)))
(defun epa-file-handler (operation &rest args)
(save-match-data
(defvar last-coding-system-used)
(defun epa-file-insert-file-contents (file &optional visit beg end replace)
(barf-if-buffer-read-only)
- (if (or beg end)
- (error "Can't read the file partially."))
+ (if (and visit (or beg end))
+ (error "Attempt to visit less than an entire file"))
(setq file (expand-file-name file))
(let ((local-copy (epa-file-run-real-handler #'file-local-copy (list file)))
(context (epg-make-context))
- point length entry)
+ string length entry)
(if visit
(setq buffer-file-name file))
(epg-context-set-passphrase-callback
context
(cons #'epa-file-passphrase-callback-function
- (current-buffer)))
+ file))
(unwind-protect
(progn
(if replace
(goto-char (point-min)))
- (setq point (point))
(condition-case error
- (insert (epg-decrypt-file context file nil))
- (error (signal 'file-error
- (cons "Opening input file"
- (nthcdr 2 error)))))
- (setq length (- (point) point))
- (if replace
- (delete-region (point) (point-max)))
- (decode-coding-region point (point) 'undecided)
+ (setq string (epg-decrypt-file context file nil))
+ (error
+ (if (setq entry (assoc file epa-file-passphrase-alist))
+ (setcdr entry nil))
+ (signal 'file-error
+ (cons "Opening input file" (cdr error)))))
+ (if (or beg end)
+ (setq string (substring string (or beg 0) end)))
+ (setq string
+ (decode-coding-string string
+ (or coding-system-for-read 'undecided)))
(if (boundp 'last-coding-system-used)
(set-buffer-file-coding-system last-coding-system-used)
(set-buffer-file-coding-system default-buffer-file-coding-system))
- (goto-char point))
+ (save-excursion
+ (insert string)
+ (setq length (length string))
+ (if replace
+ (delete-region (point) (point-max)))))
(if (and local-copy
(file-exists-p local-copy))
(delete-file local-copy)))
(if append
(error "Can't append to the file."))
(setq file (expand-file-name file))
- (let* ((coding-system (if (boundp 'last-coding-system-used)
- (condition-case nil
- (write-region (point-min) (point-max) "/")
- (error last-coding-system-used))
- buffer-file-coding-system))
+ (let* ((coding-system (or coding-system-for-write
+ (if (boundp 'last-coding-system-used)
+ (condition-case nil
+ (write-region (point-min) (point-max) "/")
+ (error last-coding-system-used))
+ buffer-file-coding-system)))
(context (epg-make-context))
- (coding-system-for-write 'binary))
+ (coding-system-for-write 'binary)
+ string entry)
(epg-context-set-passphrase-callback
context
(cons #'epa-file-passphrase-callback-function
- (current-buffer)))
+ file))
+ (condition-case error
+ (setq string
+ (epg-encrypt-string
+ context
+ (if (stringp start)
+ (encode-coding-string start coding-system)
+ (encode-coding-string (buffer-substring start end)
+ coding-system))
+ (unless (assoc file epa-file-passphrase-alist)
+ (epa-select-keys
+ context
+ "Select recipents for encryption.
+If no one is selected, symmetric encryption will be performed. "))))
+ (error
+ (if (setq entry (assoc file epa-file-passphrase-alist))
+ (setcdr entry nil))
+ (signal 'file-error (cons "Opening output file" (cdr error)))))
(epa-file-run-real-handler
#'write-region
- (list (epg-encrypt-string
- context
- (encode-coding-string (buffer-string) coding-system)
- (mapcar (lambda (key)
- (epg-sub-key-id (car (epg-key-sub-key-list key))))
- (unless (assoc (current-buffer) epa-passphrase-alist)
- (epa-select-keys
- "Select recipents for encryption.
-If no one is selected, symmetric encryption will be performed. "))))
- nil file append visit lockname mustbenew))
+ (list string nil file append visit lockname mustbenew))
(if (boundp 'last-coding-system-used)
(setq last-coding-system-used coding-system))
(if (eq visit t)
(message "Wrote %s" buffer-file-name))))
(put 'write-region 'epa-file 'epa-file-write-region)
+;;;###autoload
+(defun epa-file-enable ()
+ (interactive)
+ (if (memq epa-file-handler file-name-handler-alist)
+ (message "`epa-file' already enabled")
+ (setq file-name-handler-alist
+ (cons epa-file-handler file-name-handler-alist))
+ (message "`epa-file' enabled")))
+
+;;;###autoload
+(defun epa-file-disable ()
+ (interactive)
+ (if (memq epa-file-handler file-name-handler-alist)
+ (progn
+ (setq file-name-handler-alist
+ (delq epa-file-handler file-name-handler-alist))
+ (message "`epa-file' disabled"))
+ (message "`epa-file' already disabled")))
+
(provide 'epa-file)
;;; epa-file.el ends here
projects / elisp / epg.git / blobdiff