epa-dired.el

   1 (require 'epa)
   2 (require 'dired)
   3
   4 (defvar epa-dired-map
   5   (let ((keymap (make-sparse-keymap)))
   6     (define-key keymap "d" 'epa-dired-do-decrypt)
   7     (define-key keymap "v" 'epa-dired-do-verify)
   8     (define-key keymap "s" 'epa-dired-do-sign)
   9     (define-key keymap "e" 'epa-dired-do-encrypt)
  10     keymap))
  11
  12 (fset 'epa-dired-prefix epa-dired-map)
  13
  14 (defun epa-dired-setup ()
  15   (add-hook 'dired-mode-hook 'epa-dired-mode-hook))
  16
  17 (defun epa-dired-mode-hook ()
  18   (define-key dired-mode-map ":" 'epa-dired-prefix))
  19
  20 (defun epa-dired-decrypt-file (file)
  21   (let ((context (epg-make-context)))
  22     (message "Decrypting %s..." (file-name-nondirectory file))
  23     (epg-decrypt-file context file (file-name-sans-extension file))
  24     (message "Decrypting %s...done" (file-name-nondirectory file))))
  25
  26 (defun epa-dired-do-decrypt ()
  27   (interactive)
  28   (let ((file-list (dired-get-marked-files)))
  29     (while file-list
  30       (epa-dired-decrypt-file (car file-list))
  31       (setq file-list (cdr file-list)))))
  32
  33 (defun epa-dired-verify-file (file)
  34   (let* ((context (epg-make-context))
  35          (plain (if (equal (file-name-extension file) "sig")
  36                     (file-name-sans-extension file))))
  37     (message "Verifying %s..." (file-name-nondirectory file))
  38     (epg-verify-file context file plain)
  39     (message "Verifying %s...done" (file-name-nondirectory file))))
  40
  41 (defun epa-dired-do-verify ()
  42   (interactive)
  43   (let ((file-list (dired-get-marked-files)))
  44     (while file-list
  45       (epa-dired-verify-file (car file-list))
  46       (setq file-list (cdr file-list)))))
  47
  48 (defun epa-dired-sign-file (file detached)
  49   (let ((signature (concat file (if detached ".sig" ".gpg")))
  50         (context (epg-make-context)))
  51     (message "Signing %s..." (file-name-nondirectory file))
  52     (epg-sign-file context file signature)
  53     (message "Signing %s...done" (file-name-nondirectory file))))
  54
  55 (defun epa-dired-do-sign (&optional detached)
  56   (interactive "p")
  57   (let ((file-list (dired-get-marked-files)))
  58     (while file-list
  59       (epa-dired-sign-file (expand-file-name (car file-list)) detached)
  60       (setq file-list (cdr file-list)))
  61     (revert-buffer)))
  62
  63 (defun epa-dired-encrypt-file (keys file)
  64   (let ((cipher (concat file ".gpg"))
  65         (context (epg-make-context)))
  66     (message "Encrypting %s..." (file-name-nondirectory file))
  67     (epg-encrypt-file context
  68                       file
  69                       (mapcar (lambda (key)
  70                                 (epg-sub-key-id
  71                                  (car (epg-key-sub-key-list key))))
  72                               keys)
  73                       cipher)
  74     (message "Encrypting %s...done" (file-name-nondirectory file))))
  75
  76 (defun epa-dired-do-encrypt ()
  77   (interactive)
  78   (let ((file-list (dired-get-marked-files)))
  79     (while file-list
  80       (epa-ask-keys "Select recipents for encryption.
  81 If no one is selected, symmetric encryption will be performed.  "
  82                     #'epa-dired-encrypt-file nil
  83                     (expand-file-name (car file-list)))
  84       (setq file-list (cdr file-list)))))
  85
  86 (provide 'epa-dired)
  87
  88 ;;; epa-dired.el ends here