SAML2: Ignore signature validation exceptions.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1624 44740490-163a-0410-bde0-09ae8108e29a

lib/SAML2/Message.php

@@ -147,7 +147,9 @@ abstract class SAML2_Message implements SAML2_SignedElement {
 
 
 		/* Validate the signature element of the message. */
+		try {
 			$sig = SAML2_Utils::validateElement($xml);
+
 			if ($sig !== FALSE) {
 				$this->certificates = $sig['Certificates'];
 				$this->validators[] = array(
@@ -156,6 +158,10 @@ abstract class SAML2_Message implements SAML2_SignedElement {
 					);
 			}
 
+		} catch (Exception $e) {
+			/* Ignore signature validation errors. */
+		}
+
 	}