io.undertow.protocols.ssl.ALPNHackClientByteArrayOutputStream 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 java.io.ByteArrayOutputStream;
/**
* Super hacky class that allows the client and server hello message to be modified and the corresponding hash generated
* at runtime.
*
*
* @author Stuart Douglas
*/
class ALPNHackClientByteArrayOutputStream extends ByteArrayOutputStream {
private final SSLEngine sslEngine;
private boolean ready = true;
/**
* the server hello that was sent over the wire, before we messed with it
*/
private byte[] receivedServerHello;
private byte[] sentClientHello;
ALPNHackClientByteArrayOutputStream(SSLEngine sslEngine) {
this.sslEngine = sslEngine;
}
@Override
public void write(byte[] b, int off, int len) {
if(ready) {
if(b[off] == 2) { // server hello
ready = false; //we are done processing
byte[] newData;
if(receivedServerHello != null) {
int b1 = b[off + 1];
int b2 = b[off + 2];
int b3 = b[off + 3];
int length = (b1 & 0xFF) << 16 | (b2 & 0xFF) << 8 | b3 & 0xFF;
if(length + 4 == len) {
newData = receivedServerHello;
} else {
newData = new byte[receivedServerHello.length + len - 4 - length];
System.arraycopy(receivedServerHello, 0, newData, 0, receivedServerHello.length);
System.arraycopy(b, length + 4, newData, receivedServerHello.length, len - 4 -length);
}
} else {
newData = new byte[len];
System.arraycopy(b, off, newData, 0, len);
}
ALPNHackSSLEngine.regenerateHashes(sslEngine, this, sentClientHello, newData);
return;
}
}
super.write(b, off, len);
}
byte[] getSentClientHello() {
return sentClientHello;
}
void setSentClientHello(byte[] sentClientHello) {
this.sentClientHello = sentClientHello;
}
byte[] getReceivedServerHello() {
return receivedServerHello;
}
void setReceivedServerHello(byte[] receivedServerHello) {
this.receivedServerHello = receivedServerHello;
}
}