| /* |
| * 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 |
| * <p/> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p/> |
| * 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.knox.gateway.dispatch; |
| |
| import org.apache.http.impl.auth.SPNegoScheme; |
| import org.ietf.jgss.GSSException; |
| |
| public class KnoxSpnegoAuthScheme extends SPNegoScheme { |
| private static long nano = Long.MIN_VALUE; |
| |
| public KnoxSpnegoAuthScheme( boolean stripPort ) { |
| super( stripPort ); |
| } |
| |
| public KnoxSpnegoAuthScheme() { |
| super(); |
| } |
| |
| @Override |
| protected byte[] generateToken(final byte[] input, final String authServer) throws GSSException { |
| // This is done to avoid issues with Keberos service ticket replay detection on the service side. |
| synchronized( KnoxSpnegoAuthScheme.class ) { |
| long now; |
| // This just insures that the system clock has advanced to a different nanosecond. |
| // Kerberos uses microsecond resolution and 1ms=1000ns. |
| while( ( now = System.nanoTime() ) == nano ) { |
| try { |
| Thread.sleep( 0 ); |
| } catch( InterruptedException e ) { |
| Thread.currentThread().interrupt(); |
| } |
| } |
| nano = now; |
| return super.generateToken( input, authServer ); |
| } |
| } |
| |
| } |