001/** 002 * 003 * Copyright © 2014 Daniele Ricci 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.jivesoftware.smack.sasl.provided; 018 019import javax.security.auth.callback.CallbackHandler; 020 021import org.jivesoftware.smack.SmackException; 022import org.jivesoftware.smack.sasl.SASLMechanism; 023import org.jivesoftware.smack.util.StringUtils; 024import org.jxmpp.util.XmppStringUtils; 025 026/** 027 * Implementation of the SASL-EXTERNAL authentication mechanism 028 * 029 * @author Daniele Ricci 030 */ 031public class SASLExternalMechanism extends SASLMechanism { 032 033 public static final String NAME = EXTERNAL; 034 035 @Override 036 protected void authenticateInternal(CallbackHandler cbh) throws SmackException { 037 // Do nothing. Auth will be done external to Smack and which will receive the localpart 038 // after the resource binding 039 } 040 041 @Override 042 protected byte[] getAuthenticationText() throws SmackException { 043 if (StringUtils.isNullOrEmpty(authenticationId)) { 044 return null; 045 } 046 047 return toBytes(XmppStringUtils.completeJidFrom(authenticationId, serviceName)); 048 } 049 050 @Override 051 public String getName() { 052 return NAME; 053 } 054 055 @Override 056 public int getPriority() { 057 return 510; 058 } 059 060 @Override 061 protected SASLMechanism newInstance() { 062 return new SASLExternalMechanism(); 063 } 064 065 @Override 066 public void checkIfSuccessfulOrThrow() throws SmackException { 067 // No check performed 068 } 069 070}