From 8f24b587c87f621f5bc9997589de5d4e3f73b1c3 Mon Sep 17 00:00:00 2001
From: Daiki Ueno <ueno@gnu.org>
Date: Mon, 29 Sep 2014 20:05:40 +0900
Subject: [PATCH] mml: Signal error on invalid <#secure> tag

* mml.el (mml-parse-1): Error out if unknown mode is specified in
<#secure> tag (bug#18513).
---
 lisp/gnus/ChangeLog | 5 +++++
 lisp/gnus/mml.el    | 4 +++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/lisp/gnus/ChangeLog b/lisp/gnus/ChangeLog
index 956cc6b70c3..7e6137226b5 100644
--- a/lisp/gnus/ChangeLog
+++ b/lisp/gnus/ChangeLog
@@ -1,3 +1,8 @@
+2014-09-29  Daiki Ueno  <ueno@gnu.org>
+
+	* mml.el (mml-parse-1): Error out if unknown mode is specified in
+	<#secure> tag (bug#18513).
+
 2014-09-11  Paul Eggert  <eggert@cs.ucla.edu>
 
 	* gnus-cloud.el (gnus-cloud-parse-version-1): Fix misspelling
diff --git a/lisp/gnus/mml.el b/lisp/gnus/mml.el
index 726faeed6a0..fccdf521303 100644
--- a/lisp/gnus/mml.el
+++ b/lisp/gnus/mml.el
@@ -257,7 +257,9 @@ part.  This is for the internal use, you should never modify the value.")
 		((string= mode "encrypt")
 		 (setq tags (list "encrypt" method)))
 		((string= mode "signencrypt")
-		 (setq tags (list "sign" method "encrypt" method))))
+		 (setq tags (list "sign" method "encrypt" method)))
+		(t
+		 (error "Unknown secure mode %s" mode)))
 	  (eval `(mml-insert-tag ,secure-mode
 				 ,@tags
 				 ,(if keyfile "keyfile")
-- 
2.39.5