sslhttpchannelendpoint.java

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// ========================================================================
// Copyright 2004-2008 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed 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.mortbay.jetty.security;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.SocketChannel;

import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLEngineResult;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLEngineResult.HandshakeStatus;

import org.mortbay.io.Buffer;
import org.mortbay.io.Buffers;
import org.mortbay.io.nio.NIOBuffer;
import org.mortbay.io.nio.SelectChannelEndPoint;
import org.mortbay.io.nio.SelectorManager;
import org.mortbay.jetty.nio.SelectChannelConnector;
import org.mortbay.log.Log;

/* ------------------------------------------------------------ */
/**
 * SslHttpChannelEndPoint.
 * 
 * @author Nik Gonzalez <[e-mail]>
 * @author Greg Wilkins <[e-mail]>
 */
public class SslHttpChannelEndPoint extends SelectChannelConnector.ConnectorEndPoint implements Runnable
{
    private static final ByteBuffer[] __NO_BUFFERS={};

    private Buffers _buffers;
    
    private SSLEngine _engine;
    private ByteBuffer _inBuffer;
    private NIOBuffer _inNIOBuffer;
    private ByteBuffer _outBuffer;
    private NIOBuffer _outNIOBuffer;

    private NIOBuffer[] _reuseBuffer=new NIOBuffer[2];    
    private ByteBuffer[] _gather=new ByteBuffer[2];

    private boolean _closing=false;
    private SSLEngineResult _result;
    private String _last;
    
    // ssl
    protected SSLSession _session;
    
    // TODO get rid of this
    // StringBuilder h = new StringBuilder(500);
    
    /* ------------------------------------------------------------ */
    public SslHttpChannelEndPoint(Buffers buffers,SocketChannel channel, SelectorManager.SelectSet selectSet, SelectionKey key, SSLEngine engine)
            throws SSLException, IOException
    {
        super(channel,selectSet,key);
        _buffers=buffers;
        
        // ssl
        _engine=engine;
        _session=engine.getSession();

        // TODO pool buffers and use only when needed.
        _outNIOBuffer=(NIOBuffer)buffers.getBuffer(_session.getPacketBufferSize());
        _outBuffer=_outNIOBuffer.getByteBuffer();
        _inNIOBuffer=(NIOBuffer)buffers.getBuffer(_session.getPacketBufferSize());
        _inBuffer=_inNIOBuffer.getByteBuffer();
        
        // h.append("CONSTRUCTED\n");
    }

    // TODO get rid of these dumps
    public void dump()
    {
        System.err.println(_result);
        // System.err.println(h.toString());
        // System.err.println("--");
    }
    
    /* ------------------------------------------------------------ */
    /* (non-Javadoc)
     * @see org.mortbay.io.nio.SelectChannelEndPoint#idleExpired()
     */
    protected void idleExpired()
    {
        try
        {
            _selectSet.getManager().dispatch(new Runnable()
            {
                public void run() 
                { 
                    doIdleExpired();
                }
            });
        }
        catch(Exception e)
        {
            Log.ignore(e);
        }
    }
    
    /* ------------------------------------------------------------ */
    protected void doIdleExpired()
    {
        // h.append("IDLE EXPIRED\n");
        super.idleExpired();
    }

    /* ------------------------------------------------------------ */
    public void close() throws IOException
    {
        // TODO - this really should not be done in a loop here - but with async callbacks.

        // h.append("CLOSE\n");
        _closing=true;
        try
        {   
            int tries=0;
            
            while (_outNIOBuffer.length()>0)
            {
                // TODO REMOVE loop check
                if (tries++>100)
                    throw new IllegalStateException();
                flush();
                Thread.sleep(100); // TODO yuck
            }

            _engine.closeOutbound();

            loop: while (isOpen() && !(_engine.isInboundDone() && _engine.isOutboundDone()))
            {   
                // TODO REMOVE loop check
                if (tries++>100)
                    throw new IllegalStateException();
                
                if (_outNIOBuffer.length()>0)
                {
                    flush();
                    Thread.sleep(100); // TODO yuck
                }

                switch(_engine.getHandshakeStatus())
                {
                    case FINISHED:
                    case NOT_HANDSHAKING:
                        break loop;
                        
                    case NEED_UNWRAP:
                        Buffer buffer =_buffers.getBuffer(_engine.getSession().getApplicationBufferSize());
                        try
                        {
                            ByteBuffer bbuffer = ((NIOBuffer)buffer).getByteBuffer();
                            if (!unwrap(bbuffer) && _engine.getHandshakeStatus()==HandshakeStatus.NEED_UNWRAP)
                            {
                                // h.append("break loop\n");
                                break loop;
                            }
                        }
                        catch(SSLException e)
                        {
                            Log.ignore(e);
                        }
                        finally
                        {
                            _buffers.returnBuffer(buffer);
                        }
                        break;
                        
                    case NEED_TASK:
                    {
                        Runnable task;
                        while ((task=_engine.getDelegatedTask())!=null)
                        {
                            task.run();
                        }
                        break;
                    }
                        
                    case NEED_WRAP:
                    {
                        if (_outNIOBuffer.length()>0)
                            flush();
                        
                        try
                        {
                            _outNIOBuffer.compact();
                            int put=_outNIOBuffer.putIndex();
                            _outBuffer.position(put);
                            _result=null;
                            _last="close wrap";
                            _result=_engine.wrap(__NO_BUFFERS,_outBuffer);
                            _outNIOBuffer.setPutIndex(put+_result.bytesProduced());
                        }
                        finally
                        {
                            _outBuffer.position(0);
                        }
                        
                        flush();
                        
                        break;
                    }
                }
            }
        }
        catch(IOException e)
        {
            Log.ignore(e);
        }
        catch (InterruptedException e)
        {
            Log.ignore(e);
        }
        finally
        {
            super.close();
            
            if (_inNIOBuffer!=null)
                _buffers.returnBuffer(_inNIOBuffer);
            if (_outNIOBuffer!=null)
                _buffers.returnBuffer(_outNIOBuffer);
            if (_reuseBuffer[0]!=null)
                _buffers.returnBuffer(_reuseBuffer[0]);
            if (_reuseBuffer[1]!=null)
                _buffers.returnBuffer(_reuseBuffer[1]);
        }   
    }

    /* ------------------------------------------------------------ */
    /* 
     */
    public int fill(Buffer buffer) throws IOException
    {
        ByteBuffer bbuf=extractInputBuffer(buffer);
        int size=buffer.length();
        HandshakeStatus initialStatus = _engine.getHandshakeStatus();
        synchronized (bbuf)
        {
            try
            {
                unwrap(bbuf);

                int tries=0, wraps=0;
                loop: while (true)
                {
                    // TODO REMOVE loop check
                    if (tries++>100)
                        throw new IllegalStateException();

                    // h.append("Fill(Buffer)\n");
                    
                    if (_outNIOBuffer.length()>0)
                        flush();

                    // h.append("status=").append(_engine.getHandshakeStatus()).append('\n');
                    switch(_engine.getHandshakeStatus())
                    {
                        case FINISHED:
                        case NOT_HANDSHAKING:
                            if (_closing)
                                return -1;
                            break loop;

                        case NEED_UNWRAP:
                            if (!unwrap(bbuf) && _engine.getHandshakeStatus()==HandshakeStatus.NEED_UNWRAP)
                            {
                                // h.append("break loop\n");
                                break loop;
                            }
                            break;

                        case NEED_TASK:
                        {
                            Runnable task;
                            while ((task=_engine.getDelegatedTask())!=null)
                            {
                                // h.append("run task\n");
                                task.run();
                            }
                            if(initialStatus==HandshakeStatus.NOT_HANDSHAKING && 
                                    HandshakeStatus.NEED_UNWRAP==_engine.getHandshakeStatus() && wraps==0)
                            {
                                // This should be NEED_WRAP
                                // The fix simply detects the signature of the bug and then close the connection (fail-fast) so that ff3 will delegate to using SSL instead of TLS.
                                // This is a jvm bug on java1.6 where the SSLEngine expects more data from the initial handshake when the client(ff3-tls) already had given it.
                                // See http://jira.codehaus.org/browse/JETTY-567 for more details
                                return -1;
                            }
                            break;
                        }

                        case NEED_WRAP:
                        {
                            wraps++;
                            synchronized(_outBuffer)
                            {
                                try
                                {
                                    _outNIOBuffer.compact();
                                    int put=_outNIOBuffer.putIndex();
                                    _outBuffer.position();
                                    _result=null;
                                    _last="fill wrap";
                                    _result=_engine.wrap(__NO_BUFFERS,_outBuffer);
                                    switch(_result.getStatus())
                                    {
                                        case BUFFER_OVERFLOW:
                                        case BUFFER_UNDERFLOW:
                                            Log.warn("wrap {}",_result);
                                        case CLOSED:
                                            _closing=true;
                                    }
                                    
                                    // h.append("wrap ").append(result).append('\n');
                                    _outNIOBuffer.setPutIndex(put+_result.bytesProduced());
                                }
                                finally
                                {
                                    _outBuffer.position(0);
                                }
                            }

                            flush();

                            break;
                        }
                    }
                }
            }
            catch(SSLException e)
            {
                Log.warn(e.toString());
                Log.debug(e);
                throw e;
            }
            finally
            {
                buffer.setPutIndex(bbuf.position());
                bbuf.position(0);
            }
        }
        return buffer.length()-size; 

    }

    /* ------------------------------------------------------------ */
    public int flush(Buffer buffer) throws IOException
    {
        return flush(buffer,null,null);
    }


    /* ------------------------------------------------------------ */
    /*     
     */
    public int flush(Buffer header, Buffer buffer, Buffer trailer) throws IOException
    {   
        int consumed=0;
        int available=header.length();
        if (buffer!=null)
            available+=buffer.length();
        
        int tries=0;
        loop: while (true)
        {
            // TODO REMOVE loop check
            if (tries++>100)
                throw new IllegalStateException();
            
            // h.append("Flush ").append(tries).append(' ').append(_outNIOBuffer.length()).append('\n');
            
            if (_outNIOBuffer.length()>0)
                flush();