SAML2_Utils: Handle signatures of the DOMDocument element.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@2252 44740490-163a-0410-bde0-09ae8108e29a

lib/SAML2/Utils.php

@@ -59,6 +59,10 @@ class SAML2_Utils {
 			if ($signedNode->isSameNode($root)) {
 				$rootSigned = TRUE;
 				break;
+			} elseif ($root->parentNode instanceof DOMDocument && $signedNode->isSameNode($root->ownerDocument)) {
+				/* $root is the root element of a signed document. */
+				$rootSigned = TRUE;
+				break;
 			}
 		}
 		if (!$rootSigned) {