package org.apache.archiva.webdav;
   
   /*
    * 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.
   */
  
  import org.apache.archiva.redback.authentication.AuthenticationException;
  import org.apache.archiva.redback.authentication.AuthenticationResult;
  import org.apache.archiva.redback.authorization.UnauthorizedException;
  import org.apache.archiva.redback.integration.filter.authentication.HttpAuthenticator;
  import org.apache.archiva.redback.policy.AccountLockedException;
  import org.apache.archiva.redback.policy.MustChangePasswordException;
  import org.apache.archiva.redback.users.UserManager;
  import org.apache.archiva.security.ServletAuthenticator;
  import org.apache.archiva.webdav.util.RepositoryPathUtil;
  import org.apache.archiva.webdav.util.WebdavMethodUtil;
  import org.apache.jackrabbit.webdav.DavException;
  import org.apache.jackrabbit.webdav.DavServletRequest;
  import org.apache.jackrabbit.webdav.DavSessionProvider;
  import org.apache.jackrabbit.webdav.WebdavRequest;
  
  /**
   */
  public class ArchivaDavSessionProvider
      implements DavSessionProvider
  {
      private ServletAuthenticator servletAuth;
  
      private HttpAuthenticator httpAuth;
  
      public ArchivaDavSessionProvider( ServletAuthenticator servletAuth, HttpAuthenticator httpAuth )
      {
          this.servletAuth = servletAuth;
          this.httpAuth = httpAuth;
      }
  
      @Override
      public boolean attachSession( WebdavRequest request )
          throws DavException
      {
          final String repositoryId = RepositoryPathUtil.getRepositoryName( removeContextPath( request ) );
  
          try
          {
              AuthenticationResult result = httpAuth.getAuthenticationResult( request, null );
  
              //Create a dav session
              request.setDavSession( new ArchivaDavSession() );
  
              return servletAuth.isAuthenticated( request, result );
          }
          catch ( AuthenticationException e )
          {
              // safety check for MRM-911            
              String guest = UserManager.GUEST_USERNAME;
              try
              {
                  if ( servletAuth.isAuthorized( guest,
                                                 ( (ArchivaDavResourceLocator) request.getRequestLocator() ).getRepositoryId(),
                                                 WebdavMethodUtil.getMethodPermission( request.getMethod() ) ) )
                  {
                      request.setDavSession( new ArchivaDavSession() );
                      return true;
                  }
              }
              catch ( UnauthorizedException ae )
              {
                  throw new UnauthorizedDavException( repositoryId,
                                                      "You are not authenticated and authorized to access any repository." );
              }
  
              throw new UnauthorizedDavException( repositoryId, "You are not authenticated." );
          }
          catch ( MustChangePasswordException e )
          {
              throw new UnauthorizedDavException( repositoryId, "You must change your password." );
          }
          catch ( AccountLockedException e )
          {
              throw new UnauthorizedDavException( repositoryId, "User account is locked." );
          }
      }
  
      @Override
     public void releaseSession( WebdavRequest request )
     {
         request.setDavSession( null );
     }
 
     private String removeContextPath( final DavServletRequest request )
     {
         String path = request.getRequestURI();
         String ctx = request.getContextPath();
         if ( path.startsWith( ctx ) )
         {
             path = path.substring( ctx.length() );
         }
         return path;
     }
 }