| /* |
| * 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. |
| */ |
| package com.sun.org.apache.xml.internal.security.utils.resolver.implementations; |
| |
| import com.sun.org.apache.xml.internal.security.signature.XMLSignatureInput; |
| import com.sun.org.apache.xml.internal.security.utils.XMLUtils; |
| import com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverContext; |
| import com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverException; |
| import com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverSpi; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| |
| /** |
| * Handles barename XPointer Reference URIs. |
| * <BR /> |
| * To retain comments while selecting an element by an identifier ID, |
| * use the following full XPointer: URI='#xpointer(id('ID'))'. |
| * <BR /> |
| * To retain comments while selecting the entire document, |
| * use the following full XPointer: URI='#xpointer(/)'. |
| * This XPointer contains a simple XPath expression that includes |
| * the root node, which the second to last step above replaces with all |
| * nodes of the parse tree (all descendants, plus all attributes, |
| * plus all namespaces nodes). |
| * |
| * @author $Author: coheigea $ |
| */ |
| public class ResolverXPointer extends ResourceResolverSpi { |
| |
| /** {@link org.apache.commons.logging} logging facility */ |
| private static java.util.logging.Logger log = |
| java.util.logging.Logger.getLogger(ResolverXPointer.class.getName()); |
| |
| private static final String XP = "#xpointer(id("; |
| private static final int XP_LENGTH = XP.length(); |
| |
| @Override |
| public boolean engineIsThreadSafe() { |
| return true; |
| } |
| |
| /** |
| * @inheritDoc |
| */ |
| @Override |
| public XMLSignatureInput engineResolveURI(ResourceResolverContext context) |
| throws ResourceResolverException { |
| |
| Node resultNode = null; |
| Document doc = context.attr.getOwnerElement().getOwnerDocument(); |
| |
| if (isXPointerSlash(context.uriToResolve)) { |
| resultNode = doc; |
| } else if (isXPointerId(context.uriToResolve)) { |
| String id = getXPointerId(context.uriToResolve); |
| resultNode = doc.getElementById(id); |
| |
| if (context.secureValidation) { |
| Element start = context.attr.getOwnerDocument().getDocumentElement(); |
| if (!XMLUtils.protectAgainstWrappingAttack(start, id)) { |
| Object exArgs[] = { id }; |
| throw new ResourceResolverException( |
| "signature.Verification.MultipleIDs", exArgs, context.attr, context.baseUri |
| ); |
| } |
| } |
| |
| if (resultNode == null) { |
| Object exArgs[] = { id }; |
| |
| throw new ResourceResolverException( |
| "signature.Verification.MissingID", exArgs, context.attr, context.baseUri |
| ); |
| } |
| } |
| |
| XMLSignatureInput result = new XMLSignatureInput(resultNode); |
| |
| result.setMIMEType("text/xml"); |
| if (context.baseUri != null && context.baseUri.length() > 0) { |
| result.setSourceURI(context.baseUri.concat(context.uriToResolve)); |
| } else { |
| result.setSourceURI(context.uriToResolve); |
| } |
| |
| return result; |
| } |
| |
| /** |
| * @inheritDoc |
| */ |
| public boolean engineCanResolveURI(ResourceResolverContext context) { |
| if (context.uriToResolve == null) { |
| return false; |
| } |
| if (isXPointerSlash(context.uriToResolve) || isXPointerId(context.uriToResolve)) { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Method isXPointerSlash |
| * |
| * @param uri |
| * @return true if begins with xpointer |
| */ |
| private static boolean isXPointerSlash(String uri) { |
| if (uri.equals("#xpointer(/)")) { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Method isXPointerId |
| * |
| * @param uri |
| * @return whether it has an xpointer id |
| */ |
| private static boolean isXPointerId(String uri) { |
| if (uri.startsWith(XP) && uri.endsWith("))")) { |
| String idPlusDelim = uri.substring(XP_LENGTH, uri.length() - 2); |
| |
| int idLen = idPlusDelim.length() -1; |
| if (((idPlusDelim.charAt(0) == '"') && (idPlusDelim.charAt(idLen) == '"')) |
| || ((idPlusDelim.charAt(0) == '\'') && (idPlusDelim.charAt(idLen) == '\''))) { |
| if (log.isLoggable(java.util.logging.Level.FINE)) { |
| log.log(java.util.logging.Level.FINE, "Id = " + idPlusDelim.substring(1, idLen)); |
| } |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Method getXPointerId |
| * |
| * @param uri |
| * @return xpointerId to search. |
| */ |
| private static String getXPointerId(String uri) { |
| if (uri.startsWith(XP) && uri.endsWith("))")) { |
| String idPlusDelim = uri.substring(XP_LENGTH,uri.length() - 2); |
| |
| int idLen = idPlusDelim.length() -1; |
| if (((idPlusDelim.charAt(0) == '"') && (idPlusDelim.charAt(idLen) == '"')) |
| || ((idPlusDelim.charAt(0) == '\'') && (idPlusDelim.charAt(idLen) == '\''))) { |
| return idPlusDelim.substring(1, idLen); |
| } |
| } |
| |
| return null; |
| } |
| } |