SASLExternalMechanism.java

  1. /**
  2.  *
  3.  * Copyright © 2014 Daniele Ricci
  4.  *
  5.  * Licensed under the Apache License, Version 2.0 (the "License");
  6.  * you may not use this file except in compliance with the License.
  7.  * You may obtain a copy of the License at
  8.  *
  9.  *     http://www.apache.org/licenses/LICENSE-2.0
  10.  *
  11.  * Unless required by applicable law or agreed to in writing, software
  12.  * distributed under the License is distributed on an "AS IS" BASIS,
  13.  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14.  * See the License for the specific language governing permissions and
  15.  * limitations under the License.
  16.  */
  17. package org.jivesoftware.smack.sasl.provided;

  18. import javax.security.auth.callback.CallbackHandler;

  19. import org.jivesoftware.smack.sasl.SASLMechanism;
  20. import org.jivesoftware.smack.util.StringUtils;

  21. import org.jxmpp.util.XmppStringUtils;

  22. /**
  23.  * Implementation of the SASL-EXTERNAL authentication mechanism.
  24.  *
  25.  * @author Daniele Ricci
  26.  */
  27. public class SASLExternalMechanism extends SASLMechanism {

  28.     public static final String NAME = EXTERNAL;

  29.     @Override
  30.     protected void authenticateInternal(CallbackHandler cbh) {
  31.         // Do nothing. Auth will be done external to Smack and which will receive the localpart
  32.         // after the resource binding
  33.     }

  34.     @Override
  35.     protected byte[] getAuthenticationText() {
  36.         if (authorizationId != null) {
  37.           return toBytes(authorizationId.toString());
  38.         }

  39.         if (StringUtils.isNullOrEmpty(authenticationId)) {
  40.             return null;
  41.         }

  42.         return toBytes(XmppStringUtils.completeJidFrom(authenticationId, serviceName));
  43.     }

  44.     @Override
  45.     public String getName() {
  46.         return NAME;
  47.     }

  48.     @Override
  49.     public int getPriority() {
  50.         return 510;
  51.     }

  52.     @Override
  53.     protected SASLMechanism newInstance() {
  54.         return new SASLExternalMechanism();
  55.     }

  56.     @Override
  57.     public void checkIfSuccessfulOrThrow() {
  58.         // No check performed
  59.     }

  60.     @Override
  61.     public boolean authzidSupported() {
  62.       return true;
  63.     }

  64.     @Override
  65.     public boolean requiresPassword() {
  66.         return false;
  67.     }
  68. }