+;;; gpg wrapper
+
+(eval-and-compile
+ (autoload 'gpg-decrypt "gpg")
+ (autoload 'gpg-verify "gpg")
+ (autoload 'gpg-sign-detached "gpg")
+ (autoload 'gpg-sign-encrypt "gpg")
+ (autoload 'gpg-passphrase-read "gpg"))
+
+(defun mml2015-gpg-passphrase ()
+ (or (message-options-get 'gpg-passphrase)
+ (message-options-set 'gpg-passphrase (gpg-passphrase-read))))
+
+(defun mml2015-gpg-decrypt-1 ()
+ (let ((cipher (current-buffer)) plain result)
+ (if (with-temp-buffer
+ (prog1
+ (gpg-decrypt cipher (setq plain (current-buffer))
+ mml2015-result-buffer nil)
+ (set-buffer cipher)
+ (erase-buffer)
+ (insert-buffer plain)))
+ '(t)
+ ;; Some wrong with the return value, check plain text buffer.
+ (if (> (point-max) (point-min))
+ '(t)
+ (pop-to-buffer mml2015-result-buffer)
+ nil))))
+
+(defun mml2015-gpg-decrypt (handle ctl)
+ (let ((mml2015-decrypt-function 'mml2015-gpg-decrypt-1))
+ (mml2015-mailcrypt-decrypt handle ctl)))
+
+(defun mml2015-gpg-verify (handle ctl)
+ (let (part message signature)
+ (unless (setq part (mm-find-raw-part-by-type
+ ctl "application/pgp-signature" t))
+ (error "Corrupted pgp-signature part."))
+ (with-temp-buffer
+ (setq message (current-buffer))
+ (insert part)
+ (with-temp-buffer
+ (setq signature (current-buffer))
+ (unless (setq part (mm-find-part-by-type
+ (cdr handle) "application/pgp-signature"))
+ (error "Corrupted pgp-signature part."))
+ (mm-insert-part part)
+ (unless (gpg-verify message signature mml2015-result-buffer)
+ (pop-to-buffer mml2015-result-buffer)
+ (error "Verify error.")))))
+ handle)
+
+(defun mml2015-gpg-sign (cont)
+ (let ((boundary
+ (funcall mml-boundary-function (incf mml-multipart-number)))
+ (text (current-buffer)) signature)
+ (goto-char (point-max))
+ (unless (bolp)
+ (insert "\n"))
+ (with-temp-buffer
+ (unless (gpg-sign-detached text (setq signature (current-buffer))
+ mml2015-result-buffer
+ nil
+ (message-options-get 'message-sender)
+ t t) ; armor & textmode
+ (unless (> (point-max) (point-min))
+ (pop-to-buffer mml2015-result-buffer)
+ (error "Sign error.")))
+ (set-buffer text)
+ (goto-char (point-min))
+ (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n"
+ boundary))
+ ;;; FIXME: what is the micalg?
+ (insert "\tmicalg=pgp-sha1; protocol=\"application/pgp-signature\"\n")
+ (insert (format "\n--%s\n" boundary))
+ (goto-char (point-max))
+ (insert (format "\n--%s\n" boundary))
+ (insert "Content-Type: application/pgp-signature\n\n")
+ (insert-buffer signature)
+ (goto-char (point-max))
+ (insert (format "--%s--\n" boundary))
+ (goto-char (point-max)))))
+
+(defun mml2015-gpg-encrypt (cont)
+ (let ((boundary
+ (funcall mml-boundary-function (incf mml-multipart-number)))
+ (text (current-buffer))
+ cipher)
+ (with-temp-buffer
+ (unless (gpg-sign-encrypt
+ text (setq cipher (current-buffer))
+ mml2015-result-buffer
+ (split-string
+ (or
+ (message-options-get 'message-recipients)
+ (message-options-set 'message-recipients
+ (read-string "Recipients: ")))
+ "[ \f\t\n\r\v,]+")
+ nil
+ (message-options-get 'message-sender)
+ t t) ; armor & textmode
+ (unless (> (point-max) (point-min))
+ (pop-to-buffer mml2015-result-buffer)
+ (error "Encrypt error.")))
+ (set-buffer text)
+ (delete-region (point-min) (point-max))
+ (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n"
+ boundary))
+ (insert "\tprotocol=\"application/pgp-encrypted\"\n\n")
+ (insert (format "--%s\n" boundary))
+ (insert "Content-Type: application/pgp-encrypted\n\n")
+ (insert "Version: 1\n\n")
+ (insert (format "--%s\n" boundary))
+ (insert "Content-Type: application/octet-stream\n\n")
+ (insert-buffer cipher)
+ (goto-char (point-max))
+ (insert (format "--%s--\n" boundary))
+ (goto-char (point-max)))))
+
+;;; General wrapper
+
+(defun mml2015-clean-buffer ()
+ (if (gnus-buffer-live-p mml2015-result-buffer)
+ (with-current-buffer mml2015-result-buffer
+ (erase-buffer)
+ t)
+ (setq mml2015-result-buffer
+ (gnus-get-buffer-create "*MML2015 Result*"))
+ nil))
+
+;;;###autoload
+(defun mml2015-decrypt (handle ctl)
+ (mml2015-clean-buffer)
+ (let ((func (nth 4 (assq mml2015-use mml2015-function-alist))))
+ (if func
+ (funcall func handle ctl)
+ handle)))
+
+;;;###autoload
+(defun mml2015-verify (handle ctl)
+ (mml2015-clean-buffer)
+ (let ((func (nth 3 (assq mml2015-use mml2015-function-alist))))
+ (if func
+ (funcall func handle ctl)
+ handle)))
+