Add support for exporting shibmd:Scope metadata with regular expressions.

Thanks to Brook Schofield for implementing this!

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3281 44740490-163a-0410-bde0-09ae8108e29a

docs/simplesamlphp-reference-idp-hosted.txt

@@ -108,6 +108,8 @@ Common options
 `scope`
 :   An array with scopes for this IdP.
     The scopes will be added to the generated XML metadata.
+    A scope can either be a domain name or a regular expression
+    matching a number of domains.
 
 `userid.attribute`
 :   The attribute name of an attribute which uniquely identifies

lib/SimpleSAML/Metadata/SAMLBuilder.php

@@ -114,7 +114,12 @@ class SimpleSAML_Metadata_SAMLBuilder {
 			foreach ($metadata->getArray('scope') as $scopetext) {
 				$s = new SAML2_XML_shibmd_Scope();
 				$s->scope = $scopetext;
-				$s->regexp = FALSE;
+				// Check whether $ ^ ( ) * | \ are in a scope -> assume regex.
+				if (1 === preg_match('/[\$\^\)\(\*\|\\\\]/', $scopetext)) {
+					$s->regexp = TRUE;
+				} else {
+					$s->regexp = FALSE;
+				}
 				$e->Extensions[] = $s;
 			}
 		}