| /** |
| * 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.security; |
| |
| import java.security.Provider; |
| import java.util.Map; |
| |
| import javax.security.auth.callback.*; |
| import javax.security.sasl.AuthorizeCallback; |
| import javax.security.sasl.Sasl; |
| import javax.security.sasl.SaslException; |
| import javax.security.sasl.SaslServer; |
| import javax.security.sasl.SaslServerFactory; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public class SaslPlainServer implements SaslServer { |
| @SuppressWarnings("serial") |
| public static class SecurityProvider extends Provider { |
| public SecurityProvider() { |
| super("SaslPlainServer", 1.0, "SASL PLAIN Authentication Server"); |
| put("SaslServerFactory.PLAIN", |
| SaslPlainServerFactory.class.getName()); |
| } |
| } |
| |
| public static class SaslPlainServerFactory implements SaslServerFactory { |
| @Override |
| public SaslServer createSaslServer(String mechanism, String protocol, |
| String serverName, Map<String,?> props, CallbackHandler cbh) |
| throws SaslException { |
| return "PLAIN".equals(mechanism) ? new SaslPlainServer(cbh) : null; |
| } |
| @Override |
| public String[] getMechanismNames(Map<String,?> props){ |
| return (props == null) || "false".equals(props.get(Sasl.POLICY_NOPLAINTEXT)) |
| ? new String[]{"PLAIN"} |
| : new String[0]; |
| } |
| } |
| |
| private CallbackHandler cbh; |
| private boolean completed; |
| private String authz; |
| |
| SaslPlainServer(CallbackHandler callback) { |
| this.cbh = callback; |
| } |
| |
| @Override |
| public String getMechanismName() { |
| return "PLAIN"; |
| } |
| |
| @Override |
| public byte[] evaluateResponse(byte[] response) throws SaslException { |
| if (completed) { |
| throw new IllegalStateException("PLAIN authentication has completed"); |
| } |
| if (response == null) { |
| throw new IllegalArgumentException("Received null response"); |
| } |
| try { |
| String payload; |
| try { |
| payload = new String(response, "UTF-8"); |
| } catch (Exception e) { |
| throw new IllegalArgumentException("Received corrupt response", e); |
| } |
| // [ authz, authn, password ] |
| String[] parts = payload.split("\u0000", 3); |
| if (parts.length != 3) { |
| throw new IllegalArgumentException("Received corrupt response"); |
| } |
| if (parts[0].isEmpty()) { // authz = authn |
| parts[0] = parts[1]; |
| } |
| |
| NameCallback nc = new NameCallback("SASL PLAIN"); |
| nc.setName(parts[1]); |
| PasswordCallback pc = new PasswordCallback("SASL PLAIN", false); |
| pc.setPassword(parts[2].toCharArray()); |
| AuthorizeCallback ac = new AuthorizeCallback(parts[1], parts[0]); |
| cbh.handle(new Callback[]{nc, pc, ac}); |
| if (ac.isAuthorized()) { |
| authz = ac.getAuthorizedID(); |
| } |
| } catch (Exception e) { |
| throw new SaslException("PLAIN auth failed: " + e.getMessage()); |
| } finally { |
| completed = true; |
| } |
| return null; |
| } |
| |
| private void throwIfNotComplete() { |
| if (!completed) { |
| throw new IllegalStateException("PLAIN authentication not completed"); |
| } |
| } |
| |
| @Override |
| public boolean isComplete() { |
| return completed; |
| } |
| |
| @Override |
| public String getAuthorizationID() { |
| throwIfNotComplete(); |
| return authz; |
| } |
| |
| @Override |
| public Object getNegotiatedProperty(String propName) { |
| throwIfNotComplete(); |
| return Sasl.QOP.equals(propName) ? "auth" : null; |
| } |
| |
| @Override |
| public byte[] wrap(byte[] outgoing, int offset, int len) |
| throws SaslException { |
| throwIfNotComplete(); |
| throw new IllegalStateException( |
| "PLAIN supports neither integrity nor privacy"); |
| } |
| |
| @Override |
| public byte[] unwrap(byte[] incoming, int offset, int len) |
| throws SaslException { |
| throwIfNotComplete(); |
| throw new IllegalStateException( |
| "PLAIN supports neither integrity nor privacy"); |
| } |
| |
| @Override |
| public void dispose() throws SaslException { |
| cbh = null; |
| authz = null; |
| } |
| } |