| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 1999-2004 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. |
| * |
| */ |
| 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.ResourceResolverException; |
| import com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverSpi; |
| import org.w3c.dom.Attr; |
| 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: mullan $ |
| */ |
| public class ResolverXPointer extends ResourceResolverSpi { |
| |
| /** {@link java.util.logging} logging facility */ |
| static java.util.logging.Logger log = |
| java.util.logging.Logger.getLogger( |
| ResolverXPointer.class.getName()); |
| |
| public boolean engineIsThreadSafe() { |
| return true; |
| } |
| |
| /** |
| * @inheritDoc |
| */ |
| public XMLSignatureInput engineResolve(Attr uri, String baseURI) |
| throws ResourceResolverException { |
| |
| Node resultNode = null; |
| Document doc = uri.getOwnerElement().getOwnerDocument(); |
| |
| String uriStr = uri.getNodeValue(); |
| if (isXPointerSlash(uriStr)) { |
| resultNode = doc; |
| |
| } else if (isXPointerId(uriStr)) { |
| String id = getXPointerId(uriStr); |
| resultNode = doc.getElementById(id); |
| |
| if (secureValidation) { |
| Element start = uri.getOwnerDocument().getDocumentElement(); |
| if (!XMLUtils.protectAgainstWrappingAttack(start, id)) { |
| Object exArgs[] = { id }; |
| throw new ResourceResolverException( |
| "signature.Verification.MultipleIDs", exArgs, |
| uri, baseURI); |
| } |
| } |
| |
| if (resultNode == null) { |
| Object exArgs[] = { id }; |
| |
| throw new ResourceResolverException( |
| "signature.Verification.MissingID", exArgs, uri, baseURI); |
| } |
| } |
| |
| XMLSignatureInput result = new XMLSignatureInput(resultNode); |
| |
| result.setMIMEType("text/xml"); |
| if (baseURI != null && baseURI.length() > 0) { |
| result.setSourceURI(baseURI.concat(uri.getNodeValue())); |
| } else { |
| result.setSourceURI(uri.getNodeValue()); |
| } |
| |
| return result; |
| } |
| |
| /** |
| * @inheritDoc |
| */ |
| public boolean engineCanResolve(Attr uri, String BaseURI) { |
| |
| if (uri == null) { |
| return false; |
| } |
| String uriStr =uri.getNodeValue(); |
| if (isXPointerSlash(uriStr) || isXPointerId(uriStr)) { |
| 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; |
| } |
| |
| |
| private static final String XP="#xpointer(id("; |
| private static final int XP_LENGTH=XP.length(); |
| /** |
| * Method isXPointerId |
| * |
| * @param uri |
| * @return it 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); |
| |
| // log.log(java.util.logging.Level.FINE, "idPlusDelim=" + idPlusDelim); |
| 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; |
| } |
| } |