| /* |
| * Copyright 2005 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| /* |
| * Copyright 2005 Sun Microsystems, Inc. All rights reserved. |
| */ |
| /* |
| * $Id$ |
| */ |
| package org.jcp.xml.dsig.internal.dom; |
| |
| import org.w3c.dom.Attr; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| |
| import org.apache.xml.security.Init; |
| import org.apache.xml.security.utils.IdResolver; |
| import org.apache.xml.security.utils.resolver.ResourceResolver; |
| import org.apache.xml.security.signature.XMLSignatureInput; |
| |
| import javax.xml.crypto.*; |
| import javax.xml.crypto.dom.*; |
| import javax.xml.crypto.dsig.*; |
| |
| /** |
| * DOM-based implementation of URIDereferencer. |
| * |
| * @author Sean Mullan |
| */ |
| public class DOMURIDereferencer implements URIDereferencer { |
| |
| static final URIDereferencer INSTANCE = new DOMURIDereferencer(); |
| |
| private DOMURIDereferencer() { |
| // need to call org.apache.xml.security.Init.init() |
| // before calling any apache security code |
| Init.init(); |
| } |
| |
| public Data dereference(URIReference uriRef, XMLCryptoContext context) |
| throws URIReferenceException { |
| |
| if (uriRef == null) { |
| throw new NullPointerException("uriRef cannot be null"); |
| } |
| if (context == null) { |
| throw new NullPointerException("context cannot be null"); |
| } |
| |
| DOMURIReference domRef = (DOMURIReference) uriRef; |
| Attr uriAttr = (Attr) domRef.getHere(); |
| String uri = uriRef.getURI(); |
| DOMCryptoContext dcc = (DOMCryptoContext) context; |
| |
| // Check if same-document URI and register ID |
| if (uri != null && uri.length() != 0 && uri.charAt(0) == '#') { |
| String id = uri.substring(1); |
| |
| if (id.startsWith("xpointer(id(")) { |
| int i1 = id.indexOf('\''); |
| int i2 = id.indexOf('\'', i1+1); |
| id = id.substring(i1+1, i2); |
| } |
| |
| // this is a bit of a hack to check for registered |
| // IDRefs and manually register them with Apache's IdResolver |
| // map which includes builtin schema knowledge of DSig/Enc IDs |
| if (context instanceof XMLSignContext) { |
| Node referencedElem = dcc.getElementById(id); |
| if (referencedElem != null) { |
| IdResolver.registerElementById((Element) referencedElem, id); |
| } |
| } |
| } |
| |
| try { |
| String baseURI = context.getBaseURI(); |
| ResourceResolver apacheResolver = |
| ResourceResolver.getInstance(uriAttr, baseURI); |
| XMLSignatureInput in = apacheResolver.resolve(uriAttr, baseURI); |
| if (in.isOctetStream()) { |
| return new ApacheOctetStreamData(in); |
| } else { |
| return new ApacheNodeSetData(in); |
| } |
| } catch (Exception e) { |
| throw new URIReferenceException(e); |
| } |
| } |
| } |