J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * reserved comment block |
| 3 | * DO NOT REMOVE OR ALTER! |
| 4 | */ |
| 5 | /* |
| 6 | * Copyright 1999-2004 The Apache Software Foundation. |
| 7 | * |
| 8 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 9 | * you may not use this file except in compliance with the License. |
| 10 | * You may obtain a copy of the License at |
| 11 | * |
| 12 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 13 | * |
| 14 | * Unless required by applicable law or agreed to in writing, software |
| 15 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 16 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 17 | * See the License for the specific language governing permissions and |
| 18 | * limitations under the License. |
| 19 | * |
| 20 | */ |
| 21 | package com.sun.org.apache.xml.internal.security.utils.resolver.implementations; |
| 22 | |
| 23 | |
| 24 | |
| 25 | import com.sun.org.apache.xml.internal.security.signature.XMLSignatureInput; |
| 26 | import com.sun.org.apache.xml.internal.security.utils.IdResolver; |
| 27 | import com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverException; |
| 28 | import com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverSpi; |
| 29 | import org.w3c.dom.Attr; |
| 30 | import org.w3c.dom.Document; |
| 31 | import org.w3c.dom.Node; |
| 32 | |
| 33 | |
| 34 | /** |
| 35 | * Handles barename XPointer Reference URIs. |
| 36 | * <BR /> |
| 37 | * To retain comments while selecting an element by an identifier ID, |
| 38 | * use the following full XPointer: URI='#xpointer(id('ID'))'. |
| 39 | * <BR /> |
| 40 | * To retain comments while selecting the entire document, |
| 41 | * use the following full XPointer: URI='#xpointer(/)'. |
| 42 | * This XPointer contains a simple XPath expression that includes |
| 43 | * the root node, which the second to last step above replaces with all |
| 44 | * nodes of the parse tree (all descendants, plus all attributes, |
| 45 | * plus all namespaces nodes). |
| 46 | * |
| 47 | * @author $Author: dims $ |
| 48 | */ |
| 49 | public class ResolverXPointer extends ResourceResolverSpi { |
| 50 | |
| 51 | /** {@link java.util.logging} logging facility */ |
| 52 | static java.util.logging.Logger log = |
| 53 | java.util.logging.Logger.getLogger( |
| 54 | ResolverXPointer.class.getName()); |
| 55 | |
| 56 | /** |
| 57 | * @inheritDoc |
| 58 | */ |
| 59 | public XMLSignatureInput engineResolve(Attr uri, String BaseURI) |
| 60 | throws ResourceResolverException { |
| 61 | |
| 62 | Node resultNode = null; |
| 63 | Document doc = uri.getOwnerElement().getOwnerDocument(); |
| 64 | |
| 65 | String uriStr=uri.getNodeValue(); |
| 66 | if (isXPointerSlash(uriStr)) { |
| 67 | resultNode = doc; |
| 68 | |
| 69 | } else if (isXPointerId(uriStr)) { |
| 70 | String id = getXPointerId(uriStr); |
| 71 | resultNode =IdResolver.getElementById(doc, id); |
| 72 | |
| 73 | // if (log.isLoggable(java.util.logging.Level.FINE)) log.log(java.util.logging.Level.FINE, "Use #xpointer(id('" + id + "')) on element " + selectedElem); |
| 74 | |
| 75 | if (resultNode == null) { |
| 76 | Object exArgs[] = { id }; |
| 77 | |
| 78 | throw new ResourceResolverException( |
| 79 | "signature.Verification.MissingID", exArgs, uri, BaseURI); |
| 80 | } |
| 81 | /* |
| 82 | resultNodes = |
| 83 | cXPathAPI |
| 84 | .selectNodeList(selectedElem, Canonicalizer |
| 85 | .XPATH_C14N_WITH_COMMENTS_SINGLE_NODE);*/ |
| 86 | } |
| 87 | |
| 88 | |
| 89 | XMLSignatureInput result = new XMLSignatureInput(resultNode); |
| 90 | |
| 91 | result.setMIMEType("text/xml"); |
| 92 | if (BaseURI != null && BaseURI.length() > 0) { |
| 93 | result.setSourceURI(BaseURI.concat(uri.getNodeValue())); |
| 94 | } else { |
| 95 | result.setSourceURI(uri.getNodeValue()); |
| 96 | } |
| 97 | |
| 98 | return result; |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * @inheritDoc |
| 103 | */ |
| 104 | public boolean engineCanResolve(Attr uri, String BaseURI) { |
| 105 | |
| 106 | if (uri == null) { |
| 107 | return false; |
| 108 | } |
| 109 | String uriStr =uri.getNodeValue(); |
| 110 | if (isXPointerSlash(uriStr) || isXPointerId(uriStr)) { |
| 111 | return true; |
| 112 | } |
| 113 | |
| 114 | return false; |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Method isXPointerSlash |
| 119 | * |
| 120 | * @param uri |
| 121 | * @return true if begins with xpointer |
| 122 | */ |
| 123 | private static boolean isXPointerSlash(String uri) { |
| 124 | |
| 125 | if (uri.equals("#xpointer(/)")) { |
| 126 | return true; |
| 127 | } |
| 128 | |
| 129 | return false; |
| 130 | } |
| 131 | |
| 132 | |
| 133 | private static final String XP="#xpointer(id("; |
| 134 | private static final int XP_LENGTH=XP.length(); |
| 135 | /** |
| 136 | * Method isXPointerId |
| 137 | * |
| 138 | * @param uri |
| 139 | * @return it it has an xpointer id |
| 140 | * |
| 141 | */ |
| 142 | private static boolean isXPointerId(String uri) { |
| 143 | |
| 144 | |
| 145 | if (uri.startsWith(XP) |
| 146 | && uri.endsWith("))")) { |
| 147 | String idPlusDelim = uri.substring(XP_LENGTH, |
| 148 | uri.length() |
| 149 | - 2); |
| 150 | |
| 151 | // if (log.isLoggable(java.util.logging.Level.FINE)) log.log(java.util.logging.Level.FINE, "idPlusDelim=" + idPlusDelim); |
| 152 | int idLen=idPlusDelim.length() -1; |
| 153 | if (((idPlusDelim.charAt(0) == '"') && (idPlusDelim |
| 154 | .charAt(idLen) == '"')) || ((idPlusDelim |
| 155 | .charAt(0) == '\'') && (idPlusDelim |
| 156 | .charAt(idLen) == '\''))) { |
| 157 | if (true) |
| 158 | if (log.isLoggable(java.util.logging.Level.FINE)) log.log(java.util.logging.Level.FINE, "Id=" |
| 159 | + idPlusDelim.substring(1, idLen)); |
| 160 | |
| 161 | return true; |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | return false; |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * Method getXPointerId |
| 170 | * |
| 171 | * @param uri |
| 172 | * @return xpointerId to search. |
| 173 | */ |
| 174 | private static String getXPointerId(String uri) { |
| 175 | |
| 176 | |
| 177 | if (uri.startsWith(XP) |
| 178 | && uri.endsWith("))")) { |
| 179 | String idPlusDelim = uri.substring(XP_LENGTH,uri.length() |
| 180 | - 2); |
| 181 | int idLen=idPlusDelim.length() -1; |
| 182 | if (((idPlusDelim.charAt(0) == '"') && (idPlusDelim |
| 183 | .charAt(idLen) == '"')) || ((idPlusDelim |
| 184 | .charAt(0) == '\'') && (idPlusDelim |
| 185 | .charAt(idLen) == '\''))) { |
| 186 | return idPlusDelim.substring(1, idLen); |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | return null; |
| 191 | } |
| 192 | } |