| /** |
| * 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 backtype.storm.security.auth; |
| |
| import java.util.Map; |
| import java.security.Principal; |
| |
| /** |
| * Map a kerberos principal to a local user |
| */ |
| public class KerberosPrincipalToLocal implements IPrincipalToLocal { |
| |
| /** |
| * Invoked once immediately after construction |
| * @param conf Storm configuration |
| */ |
| public void prepare(Map storm_conf) {} |
| |
| /** |
| * Convert a Principal to a local user name. |
| * @param principal the principal to convert |
| * @return The local user name. |
| */ |
| public String toLocal(Principal principal) { |
| //This technically does not conform with rfc1964, but should work so |
| // long as you don't have any really odd names in your KDC. |
| return principal == null ? null : principal.getName().split("[/@]")[0]; |
| } |
| } |