io.undertow.protocols.ssl.ALPNHackServerByteArrayOutputStream Maven / Gradle / Ivy
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* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 io.undertow.protocols.ssl;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLException;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
/**
* Super hacky class that allows the ServerHello message to be modified and the corresponding hash generated at runtime.
*
*
* @author Stuart Douglas
*/
class ALPNHackServerByteArrayOutputStream extends ByteArrayOutputStream {
private final SSLEngine sslEngine;
private byte[] serverHello;
private final String alpnProtocol;
private boolean ready = false;
ALPNHackServerByteArrayOutputStream(SSLEngine sslEngine, byte[] bytes, String alpnProtocol) {
this.sslEngine = sslEngine;
this.alpnProtocol = alpnProtocol;
try {
write(bytes);
} catch (IOException e) {
throw new RuntimeException(e); //never happen
}
ready = true;
}
@Override
public void write(byte[] b, int off, int len) {
if(ready) {
if(b[off] == 2) { // server hello
ready = false; //we are done processing
serverHello = new byte[len]; //TODO: actual ALPN
System.arraycopy(b, off, serverHello, 0, len);
try {
serverHello = ALPNHackServerHelloExplorer.addAlpnExtensionsToServerHello(serverHello, alpnProtocol);
} catch (SSLException e) {
throw new RuntimeException(e);
}
ALPNHackSSLEngine.regenerateHashes(sslEngine, this, toByteArray(), serverHello);
return;
}
}
super.write(b, off, len);
}
byte[] getServerHello() {
return serverHello;
}
}