All, I hacked up a bit of elisp to encrypt/decrypt a buffer of text using gpg in the backend [1]. I've hacked Common Lisp for a few years now, but, not elisp. So, I wonder if any veteran elisp hackers have any suggestions, pointers, etc.
Just load the code and put some text in a buffer; then M-x cryptob-encrypt-buffer and provide a recipient; you should get a new buffer of ASCII-armored encrypted text. Same for decryption, except you must start with the ASCII-armored encrypted text, and provide the password. The code works as is ... but I'm sure it can be improved. (Caveat: I'm using OS X so the path to gpg is likely different in most other configurations.) Thanks. -Denis Remove dvorak'ian influence from From address. [1] (require 'cl) (defvar cryptob-gpg "/sw/bin/gpg") (defvar cryptob-gpg-encrypt-flags '("-e" "--batch" "--quiet" "-a" "-o" "-")) (defvar cryptob-gpg-decrypt-flags '("-d" "--batch" "--quiet" "--passphrase-fd" "0" "-")) (defun cryptob-encrypt-buffer (recip &optional buffer) "Encrypt the contents of a text buffer using gpg." (interactive "sRecipient: ") (save-excursion (with-current-buffer (or buffer (current-buffer)) (cryptob-encrypt-region (point-min) (point-max) recip)))) (defun cryptob-decrypt-buffer (&optional buffer) "Decrypt the contents of a text buffer using gpg." (interactive) (let ((passphrase (read-passwd "Passphrase: " nil nil))) (save-excursion (with-current-buffer (or buffer (current-buffer)) (cryptob-decrypt-region (point-min) (point-max) passphrase))))) (defun cryptob-encrypt-region (start end recip) (interactive "*r\nP") (let (prog) ;; construct gpg call into a string, `prog' (let ((args (append (list cryptob-gpg) (list "-r" recip) (copy-list cryptob-gpg-encrypt-flags)))) (while args (setq prog (concat prog " " (car args)) args (cdr args)))) ;; (message "start=%d end=%d prog+args=%s" start end prog) (let ((output-buffer (get-buffer-create "*cryptob-encrypted-output*"))) ;; clear any text in output-buffer (with-current-buffer output-buffer (setq buffer-read-only t) (let ((inhibit-read-only t)) (erase-buffer) (local-set-key "q" '(lambda () (interactive) (kill-buffer (get-buffer "*cryptob-encrypted-output*")))))) (let ((inhibit-read-only t)) (call-process-region start end shell-file-name nil ; delete output-buffer ; buffer t shell-command-switch prog)) (pop-to-buffer output-buffer t)))) (defun cryptob-decrypt-region (start end passphrase) (interactive "*r") (let (prog) ;; construct gpg call into a string, `prog' (let ((args (cons cryptob-gpg (copy-list cryptob-gpg-decrypt-flags)))) (while args (setq prog (concat prog " " (car args)) args (cdr args)))) ;; put passphrase as first thing in region ;; ** in case we try to decrypt from a buffer we made, inhibit ;; read-only setting on that buffer. (let ((inhibit-read-only t)) (goto-char start) (insert passphrase "\n") (setq end (+ end (1+ (length passphrase))))) ;; (message "start=%d end=%d prog+args=%s" start end prog) (let ((output-buffer (get-buffer-create "*cryptob-decrypted-output*"))) ;; clear any text in output-buffer (with-current-buffer output-buffer (setq buffer-read-only t) (let ((inhibit-read-only t)) (erase-buffer) (local-set-key "q" '(lambda () (interactive) (kill-buffer (get-buffer "*cryptob-encrypted-output*")))))) (let ((inhibit-read-only t)) (call-process-region start end shell-file-name nil ; delete output-buffer ; buffer t shell-command-switch prog) ;; erase passphrase from current buffer; is this the right way? (goto-char start) (kill-line 1)) (pop-to-buffer output-buffer t)))) _______________________________________________ Help-gnu-emacs mailing list Help-gnu-emacs@gnu.org http://lists.gnu.org/mailman/listinfo/help-gnu-emacs