content: /*
   * 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.chemistry.opencmis.server.impl.webservices;
  
  import java.util.Collections;
  import java.util.Set;
  
  import javax.xml.namespace.QName;
  
  import org.apache.chemistry.opencmis.commons.exceptions.CmisRuntimeException;
  import org.apache.cxf.binding.soap.SoapMessage;
  import org.apache.cxf.headers.Header;
  import org.w3c.dom.Node;
  import org.w3c.dom.NodeList;
  
  /**
   * Extracts username and password from the UsernameToken header and prepares
   * them for the call context.
   * 
   * This class emulates the behavior of the OpenCMIS server framework 0.13.0 and
   * earlier.
   */
  public class UsernameTokenInterceptor extends AbstractCallContextInterceptor {
  
      public UsernameTokenInterceptor() {
          super();
      }
  
      protected static final String WSSE_NS = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd";
      protected static final QName WSSE_SECURITY = new QName(WSSE_NS, "Security");
      protected static final String WSSE_USERNAME_TOKEN = "UsernameToken";
      protected static final String WSSE_USERNAME = "Username";
      protected static final String WSSE_PASSWORD = "Password";
      protected static final String WSSE_PASSWORD_TYPE = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText";
  
      @Override
      public Set<QName> getUnderstoodHeaders() {
          return Collections.singleton(WSSE_SECURITY);
      }
  
      @Override
      public void handleMessage(SoapMessage message) {
          // don't extract a user, if there is already one
          if (getCurrentUser(message) == null) {
              Header securityHeader = message.getHeader(WSSE_SECURITY);
              if (securityHeader != null) {
                  if (!(securityHeader.getObject() instanceof Node)) {
                      throw new CmisRuntimeException("Cannot read Security header.");
                  }
  
                  Node usernameTokenNode = getUsernameTokenNode((Node) securityHeader.getObject());
                  if (usernameTokenNode == null) {
                      return;
                  }
  
                  String username = getUsername(usernameTokenNode);
                  if (username == null) {
                      return;
                  }
  
                  String password = getPassword(usernameTokenNode);
  
                  setUserAndPassword(message, username, password);
              }
          }
      }
  
      protected Node getUsernameTokenNode(Node securityNode) {
          return findElement(securityNode, WSSE_NS, WSSE_USERNAME_TOKEN);
      }
  
      protected String getUsername(Node usernameTokenNode) {
          Node node = findElement(usernameTokenNode, WSSE_NS, WSSE_USERNAME);
  
          if (node != null) {
              return node.getTextContent();
          }
  
          return null;
      }
  
      protected String getPassword(Node usernameTokenNode) {
          Node node = findElement(usernameTokenNode, WSSE_NS, WSSE_PASSWORD);
  
          if (node != null) {
              Node type = node.getAttributes().getNamedItem("Type");
              if (type == null || WSSE_PASSWORD_TYPE.equals(type.getTextContent())) {
                  return node.getTextContent();
              }
          }
  
          return null;
      }
  
      protected Node findElement(Node parent, String namespace, String localname) {
          NodeList nl = parent.getChildNodes();
  
          for (int i = 0; i < nl.getLength(); i++) {
              Node node = nl.item(i);
              if (namespace.equals(node.getNamespaceURI()) && localname.equals(node.getLocalName())
                      && node.getNodeType() == Node.ELEMENT_NODE) {
                  return node;
              }
          }
  
          return null;
      }
  }
  