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Copy pathSSLSocketChannel.java
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215 lines (192 loc) · 5.23 KB
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/**
* Copyright (C) 2003 Alexander Kout
* Originally from the jFxp project (http://jfxp.sourceforge.net/).
* Copied with permission June 11, 2012 by Femi Omojola (fomojola@ideasynthesis.com).
*/
package org.java_websocket;
import java.net.*;
import java.nio.*;
import java.nio.channels.*;
import javax.net.ssl.*;
import java.io.*;
/**
* Implements the relevant portions of the SocketChannel interface with the SSLEngine wrapper.
*/
public class SSLSocketChannel
{
private ByteBuffer clientIn, clientOut, cTOs, sTOc, wbuf;
private SocketChannel sc;
private SSLEngineResult res;
private SSLEngine sslEngine;
private int SSL;
public SSLSocketChannel(SocketChannel sc, SSLEngine sslEngine) throws IOException
{
this.sc = sc;
this.sslEngine = sslEngine;
SSL = 1;
try {
sslEngine.setEnableSessionCreation(true);
SSLSession session = sslEngine.getSession();
createBuffers(session);
// wrap
clientOut.clear();
// wait till it is connected, or for another exception to occur
if(sc.isConnected()){
performSecureSetup();
}
} catch (Exception e) {
e.printStackTrace(System.out);
SSL = 0;
}
}
int getState(){ return SSL; }
void performSecureSetup() throws IOException
{
sc.write(wrap(clientOut));
while (res.getHandshakeStatus() !=
SSLEngineResult.HandshakeStatus.FINISHED) {
if (res.getHandshakeStatus() ==
SSLEngineResult.HandshakeStatus.NEED_UNWRAP) {
// unwrap
sTOc.clear();
while (sc.read(sTOc) < 1)
try{ Thread.sleep(20); }catch(InterruptedException ie){}
sTOc.flip();
unwrap(sTOc);
if (res.getHandshakeStatus() != SSLEngineResult.HandshakeStatus.FINISHED) {
clientOut.clear();
sc.write(wrap(clientOut));
}
} else if (res.getHandshakeStatus() ==
SSLEngineResult.HandshakeStatus.NEED_WRAP) {
// wrap
clientOut.clear();
sc.write(wrap(clientOut));
} else { try{ Thread.sleep(1000); }catch(InterruptedException ie){}}
}
clientIn.clear();
clientIn.flip();
SSL = 4;
}
private synchronized ByteBuffer wrap(ByteBuffer b) throws SSLException {
cTOs.clear();
res = sslEngine.wrap(b, cTOs);
cTOs.flip();
return cTOs;
}
private synchronized ByteBuffer unwrap(ByteBuffer b) throws SSLException {
clientIn.clear();
int pos;
while (b.hasRemaining()) {
res = sslEngine.unwrap(b, clientIn);
if (res.getHandshakeStatus() ==
SSLEngineResult.HandshakeStatus.NEED_TASK) {
// Task
Runnable task;
while ((task=sslEngine.getDelegatedTask()) != null)
{
task.run();
}
} else if (res.getHandshakeStatus() ==
SSLEngineResult.HandshakeStatus.FINISHED) {
return clientIn;
} else if (res.getStatus() ==
SSLEngineResult.Status.BUFFER_UNDERFLOW) {
return clientIn;
}
}
return clientIn;
}
private void createBuffers(SSLSession session) {
int appBufferMax = session.getApplicationBufferSize();
int netBufferMax = session.getPacketBufferSize();
clientIn = ByteBuffer.allocate(65536);
clientOut = ByteBuffer.allocate(appBufferMax);
wbuf = ByteBuffer.allocate(65536);
cTOs = ByteBuffer.allocate(netBufferMax);
sTOc = ByteBuffer.allocate(netBufferMax);
}
public int write(ByteBuffer src) throws IOException {
if (SSL == 4) {
return sc.write(wrap(src));
}
return sc.write(src);
}
public int read(ByteBuffer dst) throws IOException {
int amount = 0, limit;
if (SSL == 4) {
// test if there was a buffer overflow in dst
if (clientIn.hasRemaining()) {
limit = Math.min(clientIn.remaining(), dst.remaining());
for (int i = 0; i < limit; i++) {
dst.put(clientIn.get());
amount++;
}
return amount;
}
// test if some bytes left from last read (e.g. BUFFER_UNDERFLOW)
if (sTOc.hasRemaining()) {
unwrap(sTOc);
clientIn.flip();
limit = Math.min(clientIn.limit(), dst.remaining());
for (int i = 0; i < limit; i++) {
dst.put(clientIn.get());
amount++;
}
if (res.getStatus() != SSLEngineResult.Status.BUFFER_UNDERFLOW) {
sTOc.clear();
sTOc.flip();
return amount;
}
}
if (!sTOc.hasRemaining())
sTOc.clear();
else
sTOc.compact();
if (sc.read(sTOc) == -1) {
sTOc.clear();
sTOc.flip();
return -1;
}
sTOc.flip();
unwrap(sTOc);
// write in dst
clientIn.flip();
limit = Math.min(clientIn.limit(), dst.remaining());
for (int i = 0; i < limit; i++) {
dst.put(clientIn.get());
amount++;
}
return amount;
}
return sc.read(dst);
}
public boolean isConnected() {
return sc.isConnected();
}
public void close() throws IOException {
if (SSL == 4) {
sslEngine.closeOutbound();
sslEngine.getSession().invalidate();
clientOut.clear();
sc.write(wrap(clientOut));
sc.close();
} else
sc.close();
}
public SelectableChannel configureBlocking(boolean b) throws IOException {
return sc.configureBlocking(b);
}
public boolean connect(SocketAddress remote) throws IOException {
return sc.connect(remote);
}
public boolean finishConnect() throws IOException {
return sc.finishConnect();
}
public Socket socket() {
return sc.socket();
}
public boolean isInboundDone() {
return sslEngine.isInboundDone();
}
}