+(defun gnus-article-encrypt (protocol)
+ "Replace the article with encrypted one."
+ (interactive
+ (list
+ (or gnus-article-encrypt-protocol
+ (completing-read "Encrypt protocol: "
+ gnus-article-encrypt-protocol-alist
+ nil t))))
+ (let ((func (cdr (assoc protocol gnus-article-encrypt-protocol-alist))))
+ (unless func
+ (error (format "Can't find the encrypt protocol %s" protocol)))
+ (if (equal gnus-newsgroup-name "nndraft:drafts")
+ (error "Can't encrypt the article in group nndraft:drafts."))
+ (save-excursion
+ (set-buffer gnus-summary-buffer)
+ (let ((mail-parse-charset gnus-newsgroup-charset)
+ (mail-parse-ignored-charsets gnus-newsgroup-ignored-charsets)
+ (summary-buffer gnus-summary-buffer)
+ references point)
+ (gnus-set-global-variables)
+ (when (gnus-group-read-only-p)
+ (error "The current newsgroup does not support article encrypt"))
+ (gnus-summary-show-article t)
+ (setq references
+ (or (mail-header-references gnus-current-headers) ""))
+ (set-buffer gnus-article-buffer)
+ (let* ((buffer-read-only nil)
+ (headers
+ (mapcar (lambda (field)
+ (and (save-restriction
+ (message-narrow-to-head)
+ (goto-char (point-min))
+ (search-forward field nil t))
+ (prog2
+ (message-narrow-to-field)
+ (buffer-substring (point-min) (point-max))
+ (delete-region (point-min) (point-max))
+ (widen))))
+ '("Content-Type:" "Content-Transfer-Encoding:"
+ "Content-Disposition:"))))
+ (message-narrow-to-head)
+ (message-remove-header "MIME-Version")
+ (goto-char (point-max))
+ (setq point (point))
+ (insert (apply 'concat headers))
+ (widen)
+ (narrow-to-region point (point-max))
+ (let ((message-options message-options))
+ (message-options-set 'message-sender user-mail-address)
+ (message-options-set 'message-recipients user-mail-address)
+ (message-options-set 'message-sign-encrypt 'not)
+ (funcall func))
+ (goto-char (point-min))
+ (insert "MIME-Version: 1.0\n")
+ (widen)
+ (gnus-summary-edit-article-done
+ references nil summary-buffer t))
+ (when gnus-keep-backlog
+ (gnus-backlog-remove-article
+ (car gnus-article-current) (cdr gnus-article-current)))
+ (save-excursion
+ (when (get-buffer gnus-original-article-buffer)
+ (set-buffer gnus-original-article-buffer)
+ (setq gnus-original-article nil)))
+ (when gnus-use-cache
+ (gnus-cache-update-article
+ (car gnus-article-current) (cdr gnus-article-current)))))))
+