;; 2005, 2006 Free Software Foundation, Inc.
;; Author: Daiki Ueno <ueno@unixuser.org>
+;; Symmetric encryption added by: Sascha Wilde <wilde@sha-bang.de>
;; Created: 1999/10/28
;; Keywords: PGP, OpenPGP, GnuPG
(delete-file output-file-name))
(set-default-file-modes orig-mode))))
-(defun pgg-gpg-possibly-cache-passphrase (passphrase &optional key)
+(defun pgg-gpg-possibly-cache-passphrase (passphrase &optional key notruncate)
(if (and pgg-cache-passphrase
(progn
(goto-char (point-min))
(re-search-forward "^\\[GNUPG:] \\(GOOD_PASSPHRASE\\>\\)\\|\\(SIG_CREATED\\)" nil t)))
- (pgg-add-passphrase-cache
+ (pgg-add-passphrase-to-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)))
+ passphrase
+ notruncate)))
(defvar pgg-gpg-all-secret-keys 'unknown)
nil t)
(substring (match-string 2) 8)))))
-(defun pgg-gpg-encrypt-region (start end recipients &optional sign)
+(defun pgg-gpg-lookup-key-owner (string &optional all)
+ "Search keys associated with STRING and return owner of identified key.
+
+The value may be just the bare key id, or it may be a combination of the
+user name associated with the key and the key id, with the key id enclosed
+in \"<...>\" angle brackets.
+
+Optional ALL non-nil means search all keys, including secret keys."
+ (let ((args (list "--with-colons" "--no-greeting" "--batch"
+ (if all "--list-secret-keys" "--list-keys")
+ string))
+ (key-regexp (concat "^\\(sec\\|pub\\)"
+ ":[^:]*:[^:]*:[^:]*:\\([^:]*\\):[^:]*"
+ ":[^:]*:[^:]*:[^:]*:\\([^:]*\\):")))
+ (with-temp-buffer
+ (apply #'call-process pgg-gpg-program nil t nil args)
+ (goto-char (point-min))
+ (if (re-search-forward key-regexp
+ nil t)
+ (match-string 3)))))
+
+(defun pgg-gpg-key-id-from-key-owner (key-owner)
+ (cond ((not key-owner) nil)
+ ;; Extract bare key id from outermost paired angle brackets, if any:
+ ((string-match "[^<]*<\\(.+\\)>[^>]*" key-owner)
+ (substring key-owner (match-beginning 1)(match-end 1)))
+ (key-owner)))
+
+(defun pgg-gpg-encrypt-region (start end recipients &optional sign passphrase)
"Encrypt the current region between START and END.
-If optional argument SIGN is non-nil, do a combined sign and encrypt."
+
+If optional argument SIGN is non-nil, do a combined sign and encrypt.
+
+If optional PASSPHRASE is not specified, it will be obtained from the
+passphrase cache or user."
(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)))
+ (passphrase (or passphrase
+ (when sign
+ (pgg-read-passphrase
+ (format "GnuPG passphrase for %s: "
+ pgg-gpg-user-id)
+ pgg-gpg-user-id))))
(args
(append
(list "--batch" "--textmode" "--armor" "--always-trust" "--encrypt")
(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."
+(defun pgg-gpg-encrypt-symmetric-region (start end &optional passphrase)
+ "Encrypt the current region between START and END with symmetric cipher.
+
+If optional PASSPHRASE is not specified, it will be obtained from the
+passphrase cache or user."
+ (let* ((passphrase (or passphrase
+ (pgg-read-passphrase
+ "GnuPG passphrase for symmetric encryption: ")))
+ (args
+ (append (list "--batch" "--textmode" "--armor" "--symmetric" ))))
+ (pgg-as-lbt start end 'CRLF
+ (pgg-gpg-process-region start end passphrase pgg-gpg-program args))
+ (pgg-process-when-success)))
+
+(defun pgg-gpg-decrypt-region (start end &optional passphrase)
+ "Decrypt the current region between START and END.
+
+If optional PASSPHRASE is not specified, it will be obtained from the
+passphrase cache or user."
(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))
+ ;; XXX the user is stuck if they need to use the passphrase for
+ ;; any but the first secret key for which the message is
+ ;; encrypted. ideally, we would incrementally give them a
+ ;; chance with subsequent keys each time they fail with one.
(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))
+ (key-owner (and key (pgg-gpg-lookup-key-owner key t)))
+ (key-id (pgg-gpg-key-id-from-key-owner key-owner))
+ (pgg-gpg-user-id (or key-id key
+ pgg-gpg-user-id pgg-default-user-id))
+ (passphrase (or passphrase
+ (pgg-read-passphrase
+ (format (if (pgg-gpg-symmetric-key-p message-keys)
+ "Passphrase for symmetric decryption: "
+ "GnuPG passphrase for %s: ")
+ (or key-owner "??"))
+ pgg-gpg-user-id)))
(args '("--batch" "--decrypt")))
(pgg-gpg-process-region start end passphrase pgg-gpg-program args)
(with-current-buffer pgg-errors-buffer
(goto-char (point-min))
(re-search-forward "^\\[GNUPG:] DECRYPTION_OKAY\\>" nil t))))
+;;;###autoload
+(defun pgg-gpg-symmetric-key-p (message-keys)
+ "True if decoded armor MESSAGE-KEYS has symmetric encryption indicator."
+ (let (result)
+ (dolist (key message-keys result)
+ (when (and (eq (car key) 3)
+ (member '(symmetric-key-algorithm) key))
+ (setq result key)))))
+
(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)))
+ (cdr (assq 'key-identifier
+ (cdr 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)
+(defun pgg-gpg-sign-region (start end &optional cleartext passphrase)
"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))
+ (passphrase (or 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"
projects / gnus / blobdiff