package org.apache.archiva.redback.authentication.keystore;
   
   /*
    * 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.AbstractAuthenticator;
  import org.apache.archiva.redback.authentication.AuthenticationDataSource;
  import org.apache.archiva.redback.authentication.AuthenticationException;
  import org.apache.archiva.redback.authentication.AuthenticationResult;
  import org.apache.archiva.redback.authentication.Authenticator;
  import org.apache.archiva.redback.authentication.TokenBasedAuthenticationDataSource;
  import org.apache.archiva.redback.keys.AuthenticationKey;
  import org.apache.archiva.redback.keys.KeyManager;
  import org.apache.archiva.redback.keys.KeyManagerException;
  import org.apache.archiva.redback.keys.KeyNotFoundException;
  import org.apache.archiva.redback.policy.AccountLockedException;
  import org.apache.archiva.redback.policy.MustChangePasswordException;
  import org.apache.archiva.redback.users.User;
  import org.apache.archiva.redback.users.UserManager;
  import org.apache.archiva.redback.users.UserManagerException;
  import org.apache.archiva.redback.users.UserNotFoundException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.stereotype.Service;
  
  import javax.annotation.Resource;
  
  /**
   * KeyStoreAuthenticator:
   *
   * @author: Jesse McConnell <jesse@codehaus.org>
   */
  @Service("authenticator#keystore")
  public class KeyStoreAuthenticator
      extends AbstractAuthenticator
      implements Authenticator
  {
      private Logger log = LoggerFactory.getLogger( getClass() );
  
      @Resource(name = "keyManager#cached")
      private KeyManager keystore;
  
      @Resource(name = "userManager#default")
      private UserManager userManager;
  
      public String getId()
      {
          return getClass().getName();
      }
  
      public AuthenticationResult authenticate( AuthenticationDataSource source )
          throws AccountLockedException, AuthenticationException, MustChangePasswordException
      {
          TokenBasedAuthenticationDataSource dataSource = (TokenBasedAuthenticationDataSource) source;
  
          String key = dataSource.getToken();
          try
          {
              AuthenticationKey authKey = keystore.findKey( key );
  
              // if we find a key (exception was probably thrown if not) then we should be authentic
              if ( authKey != null )
              {
                  User user = userManager.findUser( dataSource.getUsername() );
  
                  if ( user.isLocked() )
                  {
                      throw new AccountLockedException( "Account " + source.getUsername() + " is locked.", user );
                  }
  
                  if ( user.isPasswordChangeRequired() && source.isEnforcePasswordChange() )
                  {
                      throw new MustChangePasswordException( "Password expired.", user );
                  }
  
                  return new AuthenticationResult( true, dataSource.getUsername(), null );
              }
              else
              {
                  return new AuthenticationResult( false, dataSource.getUsername(),
                                                   new AuthenticationException( "unable to find key" ) );
              }
          }
         catch ( KeyNotFoundException ne )
         {
             return new AuthenticationResult( false, null, ne );
         }
         catch ( KeyManagerException ke )
         {
             throw new AuthenticationException( "underlaying keymanager issue", ke );
         }
         catch ( UserNotFoundException e )
         {
             log.warn( "Login for user {} failed. user not found.", source.getUsername() );
             return new AuthenticationResult( false, null, e );
         }
         catch ( UserManagerException e )
         {
             log.warn( "Login fail for user {} failed. message: {}", source.getUsername(), e.getMessage() );
             return new AuthenticationResult( false, null, e );
         }
     }
 
     public boolean supportsDataSource( AuthenticationDataSource source )
     {
         return source instanceof TokenBasedAuthenticationDataSource;
     }
 }