Function: pgg-gpg-decrypt-region

pgg-gpg-decrypt-region is a byte-compiled function defined in pgg-gpg.el.gz.

Signature

(pgg-gpg-decrypt-region START END &optional PASSPHRASE)

Documentation

Decrypt the current region between START and END.

If optional PASSPHRASE is not specified, it will be obtained from the passphrase cache or user.

Source Code

;; Defined in /usr/src/emacs/lisp/obsolete/pgg-gpg.el.gz
(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))
	 (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
			 (when (not (pgg-gpg-use-agent-p))
			   (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
      (pgg-gpg-possibly-cache-passphrase passphrase pgg-gpg-user-id)
      (goto-char (point-min))
      (re-search-forward "^\\[GNUPG:] DECRYPTION_OKAY\\>" nil t))))