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package com.sun.grizzly.websocket;
import java.io.IOException;
import java.net.SocketAddress;
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.SSLEngineResult.HandshakeStatus;
import javax.net.ssl.SSLEngineResult.Status;
import javax.net.ssl.SSLSession;
/**
* TODO: gethold of ssl buffers used in grizzly in non standalone mode
* to transfer data that might exist after handshake ?.
* TODO: add config for use of native buffers.
* TODO: handle SSL rehandshake.
* TODO: JDK SSLSessionContextImpl needs cleanup.
*
*/
public class SSLIOhandler extends TCPIOhandler implements Handshaker{
//protected final static int maxSSLbuffersize = (1<<18) +(1<<15);
private final SSLEngine sslEngine;
private HandshakeStatus hr,delayedwrapstatus;
private boolean initilSSLHandshakedone;
private boolean needsinit = true;
private ByteBuffer sslReadBuffer;
private ByteBuffer sslWriteBuffer;
/**
*
* @param addr
* @param ssleng
* @throws IOException
*/
public SSLIOhandler(SocketAddress addr,SSLEngine ssleng)throws IOException{
this(connectAsync(addr),ssleng);
}
/**
*
* @param channel
* @param sslengine
*/
public SSLIOhandler(SocketChannel channel,SSLEngine sslengine){
super(channel);
if (sslengine == null){
throw new IllegalArgumentException("sslengine is null");
}
this.sslEngine = sslengine;
super.addHandshaker(this);
init();
}
/**
* Returns the number of decrypted bytes.
* @param buffer
* @return
* @throws IOException
*/
@Override
public int read(ByteBuffer buffer) throws IOException{
ByteBuffer rbuf = sslReadBuffer;
compactClear(rbuf);
int bytesRead = super.read(rbuf);
// boolean firstreadfilledbuffer = rbuf.remaining() == 0;
/* if (bytesRead == rbuf.capacity() && bytesRead < maxSSLbuffersize){
sslReadBuffer = rbuf = increaseBuffer(rbuf);
}*/
// System.err.println("read "+bytesRead +" id:"+key.hashCode()+" " +rbuf+" selthread: "+selthread+" targetbuf:"+buffer);
rbuf.flip();
int produced = 0;
do {
SSLEngineResult result = sslEngine.unwrap(rbuf,buffer);
//System.err.println("readP"+bytesRead +" id:"+key.hashCode()+" " +rbuf+" selthread: "+selthread+" targetbuf:"+buffer);
Status st = result.getStatus();
if (st == Status.OK)
produced += result.bytesProduced();
if (st == Status.BUFFER_UNDERFLOW) {
/*if (firstreadfilledbuffer){
firstreadfilledbuffer = false;
rbuf.compact();
bytesRead = channel.read(rbuf);
if (bytesRead == -1){
throw otherpeerclosed;
}
rbuf.flip();
if (bytesRead > 0 )
continue;
}*/
return produced;
}
if (st == Status.BUFFER_OVERFLOW) {
//if (produced > 0 )
//return produced;
throw new RuntimeException("SSLread Bufferoverflow in:"+ selectLogicHandler);
}
if (st == Status.CLOSED){
throw new IOException("SSL closed during unwrap.");
}
if (result.getHandshakeStatus() != HandshakeStatus.NOT_HANDSHAKING){
throw new RuntimeException("SSL unwrap "+result);
}
}while (rbuf.hasRemaining());
return produced;
}
/**
* @param buffer
* @return true
* @throws IOException
*/
private SSLEngineResult handshakeread(ByteBuffer bb) throws IOException {
ByteBuffer sslread = sslReadBuffer;
compactClear(sslread);
final int bytesRead = channel.read(sslread);
if (bytesRead == -1)
throw otherpeerclosed;
sslread.flip();
/*if (bytesRead == 0 && !sslread.hasRemaining()) {
return 0;
}*/
SSLEngineResult result ;
do {
result = sslEngine.unwrap(sslread, bb);
} while (result.getStatus() == Status.OK &&
result.getHandshakeStatus() == HandshakeStatus.NEED_UNWRAP);
Status st = result.getStatus();
if (st == SSLEngineResult.Status.CLOSED) {
throw new IOException("SSL handshake "+st);
}
if (st == SSLEngineResult.Status.BUFFER_OVERFLOW) {
throw new RuntimeException(st+" in "+bb);
}
hr = result.getHandshakeStatus();
return result;
}
private boolean flush() throws IOException{
final ByteBuffer wbuf = sslWriteBuffer;
if (channel.write(wbuf) == 0){//TODO: remove this when QA is done ?
throw new RuntimeException("SSL.flush 0 bytes from "+wbuf);
}
return wbuf.remaining() == 0;
}
@Override
public boolean write(ByteBuffer buffer) throws IOException {
// 16635 at least is needed free or buffer overflow will trigger.
final ByteBuffer wbuf = sslWriteBuffer;
if (buffer.remaining() == 0 && wbuf.hasRemaining() ){
return super.write(wbuf);
}
wbuf.clear();
//int written = 0;
do {
SSLEngineResult rs = sslEngine.wrap(buffer, wbuf);
Status st = rs.getStatus();
//written += rs.bytesConsumed();
if (st == Status.OK) {
if (rs.getHandshakeStatus() != HandshakeStatus.NOT_HANDSHAKING) {
throw new RuntimeException("SSL wrap "+rs.getHandshakeStatus());
}
continue;
}
if (st == Status.BUFFER_OVERFLOW) {
/*if (wbuf.capacity() < maxSSLbuffersize) {
sslWriteBuffer = wbuf = increaseBuffer(wbuf);
continue;
}*/
break;
}
if (st == Status.BUFFER_UNDERFLOW) {
throw new RuntimeException("SSL wrap underflow: " + buffer);
}
throw new IOException("SSL write wrap failed due to closed");
} while (buffer.hasRemaining());
wbuf.flip();
return super.write(wbuf) && buffer.remaining() == 0;
}
/*private final ByteBuffer increaseBuffer(ByteBuffer bb){
bb.flip();
return ByteBuffer.allocate(
Math.min(bb.capacity()*2,maxSSLbuffersize)).put(bb);
}*/
private final static ByteBuffer zerobuf = ByteBuffer.allocate(0);
public boolean doHandshake(ByteBuffer bb) throws Exception{
if (needsinit){
needsinit = false;
if (sslEngine.getUseClientMode()){
sslEngine.beginHandshake();
hr = sslEngine.getHandshakeStatus();
}else{
hr = HandshakeStatus.FINISHED; //for grizzly server
}
}
if (hr == HandshakeStatus.NEED_TASK){
throw new IOException("SSLhandshake interrupted by unexpected " +
"selectionkey ready, most likely is the socket closed");
}
while (true) {
// System.err.println("hs "+hr);
switch(hr) {
case NEED_WRAP:
final ByteBuffer wbuf = sslWriteBuffer;
if (wbuf.hasRemaining()){
System.err.println("wrap flush performed ");
if (flush()){
hr = delayedwrapstatus;
continue;
}
return false;
}
wbuf.clear();
SSLEngineResult result = sslEngine.wrap(zerobuf, wbuf);
wbuf.flip();
if (result.getStatus() == Status.OK){
channel.write(wbuf);
if (wbuf.hasRemaining()){
System.err.println("wrap write interest needed ");
delayedwrapstatus = result.getHandshakeStatus();
initialInterest(SelectionKey.OP_WRITE);
return false;
}
//only updating status when no data remains to write.
hr = result.getHandshakeStatus();
continue;
}
throw new IOException("SSLhandshake :"+result);
case NEED_UNWRAP:
SSLEngineResult rs = handshakeread(bb);
if (rs.getStatus() == Status.BUFFER_UNDERFLOW){
// System.err.println("umwrap read interest needed ");
initialInterest(SelectionKey.OP_READ);
return false;
}
continue;
case NEED_TASK:
handletasks();
return false;
case FINISHED:
if (!initilSSLHandshakedone){
initilSSLHandshakedone = true;
bb.clear();//TODO remove clear ?
sslWriteBuffer.clear();
}
return true;
default:
throw new IllegalStateException(
"invalid SSL handshake state: "+hr);
}
}
}
private final void init() {
SSLSession session = sslEngine.getSession();
int packetsize = session.getPacketBufferSize();
sslReadBuffer = ByteBuffer.allocate(packetsize+1024);
sslWriteBuffer = ByteBuffer.allocate(packetsize*2);
sslWriteBuffer.limit(0);
sslReadBuffer.limit(0);
}
public int getRequiredReadBuffersize(){
return sslReadBuffer.capacity();
}
private final void handletasks() throws IOException{
SelectThread.workers.execute(new Runnable(){
public void run() {
final SelectorLogicHandler slh = selectLogicHandler;
try{
Runnable task;
while ((task = sslEngine.getDelegatedTask()) != null) {
task.run();
}
selthread.offerTask(new Runnable() {
public void run() {
try{
hr = sslEngine.getHandshakeStatus();
}catch(Throwable t){
slh.close(t);
}
//timestamp 0 is ok during handshake, its not used.
slh.handleSelectedKey(key,0);
}
});
}catch(Throwable t){
//this call to close might cause select thread to wait on
//locks, it should however be extremely rare that close is
//needed here,but if something goes wrong its best to close
//without having to deal with possible froblems from
//threadpools etc.
slh.close(t);
}
}});
//TODO would it be safe to leave read interest on ?
initialInterest(0);
}
protected final static void compactClear(ByteBuffer buf) {
final int pos = buf.position();
if (pos == buf.limit()) {
buf.clear();
return;
}
if (pos > 0 ) {
buf.compact();
}
}
@Override
public void close() throws IOException {
try{//TODO SSL compliant shutdown logic needed ?
sslEngine.closeInbound();
}finally{
super.close();
}
}
@Override
public String toString() {
return super.toString()+
" initilSSLHandshakedone: "+initilSSLHandshakedone+
" handshake: "+hr+"\r\n"+
" engstatus: "+sslEngine.getHandshakeStatus()+
" sslEngine: "+sslEngine+
" sslReadBuffer: "+sslReadBuffer+
" sslWriteBuffer: "+sslWriteBuffer
;
}
}
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