/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */
Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you 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.
/** * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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 (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved. */ /* * $Id: DOMURIDereferencer.java 1231033 2012-01-13 12:12:12Z coheigea $ */ package org.jcp.xml.dsig.internal.dom; import org.w3c.dom.Attr; import org.w3c.dom.Element; import org.w3c.dom.Node; import com.sun.org.apache.xml.internal.security.Init; import com.sun.org.apache.xml.internal.security.utils.XMLUtils; import com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolver; import com.sun.org.apache.xml.internal.security.signature.XMLSignatureInput; import javax.xml.crypto.*; import javax.xml.crypto.dom.*;
DOM-based implementation of URIDereferencer.
Author:Sean Mullan
/** * DOM-based implementation of URIDereferencer. * * @author Sean Mullan */
public class DOMURIDereferencer implements URIDereferencer { static final URIDereferencer INSTANCE = new DOMURIDereferencer(); private DOMURIDereferencer() { // need to call com.sun.org.apache.xml.internal.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; String baseURI = context.getBaseURI(); boolean secVal = Utils.secureValidation(context); if (secVal && Policy.restrictReferenceUriScheme(uri)) { throw new URIReferenceException( "Uri " + uri + " is forbidden when secure validation is enabled"); } // Check if same-document URI and already registered on the context 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); } // check if element is registered by Id Node referencedElem = uriAttr.getOwnerDocument().getElementById(id); if (referencedElem == null) { // see if element is registered in DOMCryptoContext referencedElem = dcc.getElementById(id); } if (referencedElem != null) { if (secVal && Policy.restrictDuplicateIds()) { Element start = referencedElem.getOwnerDocument().getDocumentElement(); if (!XMLUtils.protectAgainstWrappingAttack(start, (Element)referencedElem, id)) { String error = "Multiple Elements with the same ID " + id + " detected when secure validation" + " is enabled"; throw new URIReferenceException(error); } } XMLSignatureInput result = new XMLSignatureInput(referencedElem); if (!uri.substring(1).startsWith("xpointer(id(")) { result.setExcludeComments(true); } result.setMIMEType("text/xml"); if (baseURI != null && baseURI.length() > 0) { result.setSourceURI(baseURI.concat(uriAttr.getNodeValue())); } else { result.setSourceURI(uriAttr.getNodeValue()); } return new ApacheNodeSetData(result); } } try { ResourceResolver apacheResolver = ResourceResolver.getInstance(uriAttr, baseURI, false); XMLSignatureInput in = apacheResolver.resolve(uriAttr, baseURI, false); if (in.isOctetStream()) { return new ApacheOctetStreamData(in); } else { return new ApacheNodeSetData(in); } } catch (Exception e) { throw new URIReferenceException(e); } } }