| /** |
| * 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 org.apache.xml.security.stax.impl.processor.input; |
| |
| import java.util.NoSuchElementException; |
| |
| import javax.xml.stream.XMLStreamConstants; |
| import javax.xml.stream.XMLStreamException; |
| import javax.xml.stream.XMLStreamReader; |
| |
| import org.apache.xml.security.exceptions.XMLSecurityException; |
| import org.apache.xml.security.stax.config.ConfigurationProperties; |
| import org.apache.xml.security.stax.ext.AbstractInputProcessor; |
| import org.apache.xml.security.stax.ext.InputProcessorChain; |
| import org.apache.xml.security.stax.ext.XMLSecurityConstants; |
| import org.apache.xml.security.stax.ext.XMLSecurityProperties; |
| import org.apache.xml.security.stax.ext.stax.XMLSecEvent; |
| import org.apache.xml.security.stax.ext.stax.XMLSecEventFactory; |
| import org.apache.xml.security.stax.ext.stax.XMLSecStartElement; |
| |
| /** |
| * The XMLEventReaderInputProcessor reads requested XMLEvents from the original XMLEventReader |
| * and returns them to the requester |
| * |
| */ |
| public class XMLEventReaderInputProcessor extends AbstractInputProcessor { |
| |
| private static final Integer maximumAllowedXMLStructureDepth = |
| Integer.valueOf(ConfigurationProperties.getProperty("MaximumAllowedXMLStructureDepth")); |
| private int currentXMLStructureDepth; |
| private final XMLStreamReader xmlStreamReader; |
| private XMLSecStartElement parentXmlSecStartElement; |
| private boolean EOF = false; |
| |
| public XMLEventReaderInputProcessor(XMLSecurityProperties securityProperties, XMLStreamReader xmlStreamReader) { |
| super(securityProperties); |
| setPhase(XMLSecurityConstants.Phase.PREPROCESSING); |
| this.xmlStreamReader = xmlStreamReader; |
| } |
| |
| @Override |
| public XMLSecEvent processNextHeaderEvent(InputProcessorChain inputProcessorChain) |
| throws XMLStreamException, XMLSecurityException { |
| return processNextEventInternal(); |
| } |
| |
| @Override |
| public XMLSecEvent processNextEvent(InputProcessorChain inputProcessorChain) |
| throws XMLStreamException, XMLSecurityException { |
| return processNextEventInternal(); |
| } |
| |
| private XMLSecEvent processNextEventInternal() throws XMLStreamException { |
| XMLSecEvent xmlSecEvent = XMLSecEventFactory.allocate(xmlStreamReader, parentXmlSecStartElement); |
| if (XMLStreamConstants.START_ELEMENT == xmlSecEvent.getEventType()) { |
| currentXMLStructureDepth++; |
| if (currentXMLStructureDepth > maximumAllowedXMLStructureDepth) { |
| XMLSecurityException xmlSecurityException = new XMLSecurityException( |
| "secureProcessing.MaximumAllowedXMLStructureDepth", |
| new Object[] {maximumAllowedXMLStructureDepth} |
| ); |
| throw new XMLStreamException(xmlSecurityException); |
| } |
| |
| parentXmlSecStartElement = (XMLSecStartElement) xmlSecEvent; |
| } else if (XMLStreamConstants.END_ELEMENT == xmlSecEvent.getEventType()) { |
| currentXMLStructureDepth--; |
| |
| if (parentXmlSecStartElement != null) { |
| parentXmlSecStartElement = parentXmlSecStartElement.getParentXMLSecStartElement(); |
| } |
| } |
| if (xmlStreamReader.hasNext()) { |
| xmlStreamReader.next(); |
| } else { |
| if (EOF) { |
| throw new NoSuchElementException(); |
| } |
| EOF = true; |
| } |
| return xmlSecEvent; |
| } |
| |
| @Override |
| public void doFinal(InputProcessorChain inputProcessorChain) throws XMLStreamException, XMLSecurityException { |
| //nothing to-do. Also don't call super.doFinal() we are the last processor |
| } |
| } |