| /** |
| * 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.hadoop.gateway.identityasserter.switchcase; |
| |
| import java.util.Set; |
| import javax.security.auth.Subject; |
| import javax.servlet.FilterConfig; |
| import javax.servlet.ServletException; |
| |
| import org.apache.hadoop.gateway.identityasserter.common.filter.CommonIdentityAssertionFilter; |
| import org.apache.hadoop.gateway.security.GroupPrincipal; |
| |
| public class SwitchCaseIdentityAssertionFilter extends CommonIdentityAssertionFilter { |
| |
| private static final String USER_INIT_PARAM = "principal.case"; |
| private static final String GROUP_INIT_PARAM = "group.principal.case"; |
| |
| private enum SwitchCase { UPPER, LOWER, NONE } |
| |
| private SwitchCase userCase = SwitchCase.LOWER; |
| private SwitchCase groupCase = SwitchCase.LOWER; |
| |
| @Override |
| public void init( FilterConfig filterConfig ) throws ServletException { |
| String s; |
| s = filterConfig.getInitParameter( USER_INIT_PARAM ); |
| if ( s != null ) { |
| s = s.trim().toUpperCase(); |
| try { |
| userCase = SwitchCase.valueOf( s ); |
| groupCase = userCase; |
| } catch ( IllegalArgumentException e ) { |
| // Ignore it and use the default. |
| } |
| } |
| s = filterConfig.getInitParameter( GROUP_INIT_PARAM ); |
| if ( s != null ) { |
| s = s.trim().toUpperCase(); |
| try { |
| groupCase = SwitchCase.valueOf( s ); |
| } catch ( IllegalArgumentException e ) { |
| // Ignore it and use the default. |
| } |
| } |
| } |
| |
| @Override |
| public String mapUserPrincipal( String principalName ) { |
| return switchCase( principalName, userCase ); |
| } |
| |
| @Override |
| public String[] mapGroupPrincipals( String mappedPrincipalName, Subject subject ) { |
| String[] groupNames = null; |
| if ( groupCase != SwitchCase.NONE ) { |
| Set<GroupPrincipal> groups = subject.getPrincipals( GroupPrincipal.class ); |
| if( groups != null && groups.size() > 0 ) { |
| groupNames = new String[ groups.size() ]; |
| int i = 0; |
| for( GroupPrincipal group : groups ) { |
| groupNames[ i++ ] = switchCase( group.getName(), groupCase ); |
| } |
| } |
| } |
| return groupNames; |
| } |
| |
| private String switchCase( String name, SwitchCase switchCase ) { |
| if ( name != null ) { |
| switch( switchCase ) { |
| case UPPER: |
| return name.toUpperCase(); |
| case LOWER: |
| return name.toLowerCase(); |
| } |
| } |
| return name; |
| } |
| |
| } |