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package com.pdd.pop.ext.glassfish.grizzly.ssl;
import java.nio.ByteBuffer;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLEngineResult;
import javax.net.ssl.SSLException;
import com.pdd.pop.ext.glassfish.grizzly.AbstractTransformer;
import com.pdd.pop.ext.glassfish.grizzly.Buffer;
import com.pdd.pop.ext.glassfish.grizzly.Connection;
import com.pdd.pop.ext.glassfish.grizzly.Grizzly;
import com.pdd.pop.ext.glassfish.grizzly.TransformationException;
import com.pdd.pop.ext.glassfish.grizzly.TransformationResult;
import com.pdd.pop.ext.glassfish.grizzly.attributes.AttributeStorage;
import com.pdd.pop.ext.glassfish.grizzly.memory.Buffers;
import com.pdd.pop.ext.glassfish.grizzly.memory.ByteBufferArray;
import com.pdd.pop.ext.glassfish.grizzly.memory.CompositeBuffer;
import com.pdd.pop.ext.glassfish.grizzly.memory.MemoryManager;
import static com.pdd.pop.ext.glassfish.grizzly.ssl.SSLUtils.*;
/**
* Transformer, which encrypts plain data, contained in the
* input Buffer, into SSL/TLS data and puts the result to the output Buffer.
*
* @author Alexey Stashok
*/
public final class SSLEncoderTransformer extends AbstractTransformer {
public static final int NEED_HANDSHAKE_ERROR = 1;
public static final int BUFFER_UNDERFLOW_ERROR = 2;
public static final int BUFFER_OVERFLOW_ERROR = 3;
private static final Logger LOGGER = Grizzly.logger(SSLEncoderTransformer.class);
private static final TransformationResult HANDSHAKE_NOT_EXECUTED_RESULT =
TransformationResult.createErrorResult(
NEED_HANDSHAKE_ERROR, "Handshake was not executed");
private final MemoryManager memoryManager;
public SSLEncoderTransformer() {
this(MemoryManager.DEFAULT_MEMORY_MANAGER);
}
public SSLEncoderTransformer(MemoryManager memoryManager) {
this.memoryManager = memoryManager;
}
@Override
public String getName() {
return SSLEncoderTransformer.class.getName();
}
@Override
protected TransformationResult transformImpl(
final AttributeStorage state, final Buffer originalMessage)
throws TransformationException {
final SSLEngine sslEngine = SSLUtils.getSSLEngine((Connection) state);
if (sslEngine == null) {
return HANDSHAKE_NOT_EXECUTED_RESULT;
}
//noinspection SynchronizationOnLocalVariableOrMethodParameter
synchronized(state) { // synchronize parallel writers here
return wrapAll(sslEngine, originalMessage);
}
}
private TransformationResult wrapAll(
final SSLEngine sslEngine,
final Buffer originalMessage) throws TransformationException {
TransformationResult transformationResult = null;
Buffer targetBuffer = null;
Buffer currentTargetBuffer = null;
final ByteBufferArray originalByteBufferArray =
originalMessage.toByteBufferArray();
boolean restore = false;
for (int i = 0; i < originalByteBufferArray.size(); i++) {
final int pos = originalMessage.position();
final ByteBuffer originalByteBuffer = originalByteBufferArray.getArray()[i];
currentTargetBuffer = allowDispose(memoryManager.allocate(
sslEngine.getSession().getPacketBufferSize()));
final ByteBuffer currentTargetByteBuffer =
currentTargetBuffer.toByteBuffer();
try {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, "SSLEncoder engine: {0} input: {1} output: {2}",
new Object[]{sslEngine, originalByteBuffer, currentTargetByteBuffer});
}
final SSLEngineResult sslEngineResult =
sslEngineWrap(sslEngine, originalByteBuffer,
currentTargetByteBuffer);
// If the position of the original message hasn't changed,
// update the position now.
if (pos == originalMessage.position()) {
restore = true;
originalMessage.position(pos + sslEngineResult.bytesConsumed());
}
final SSLEngineResult.Status status = sslEngineResult.getStatus();
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, "SSLEncoder done engine: {0} result: {1} input: {2} output: {3}",
new Object[]{sslEngine, sslEngineResult, originalByteBuffer, currentTargetByteBuffer});
}
if (status == SSLEngineResult.Status.OK) {
currentTargetBuffer.position(sslEngineResult.bytesProduced());
currentTargetBuffer.trim();
targetBuffer = Buffers.appendBuffers(memoryManager,
targetBuffer, currentTargetBuffer);
} else if (status == SSLEngineResult.Status.CLOSED) {
transformationResult =
TransformationResult.createCompletedResult(
Buffers.EMPTY_BUFFER, originalMessage);
break;
} else {
if (status == SSLEngineResult.Status.BUFFER_UNDERFLOW) {
transformationResult =
TransformationResult.createErrorResult(
BUFFER_UNDERFLOW_ERROR,
"Buffer underflow during wrap operation");
} else if (status == SSLEngineResult.Status.BUFFER_OVERFLOW) {
transformationResult =
TransformationResult.createErrorResult(
BUFFER_OVERFLOW_ERROR,
"Buffer overflow during wrap operation");
}
break;
}
} catch (SSLException e) {
disposeBuffers(currentTargetBuffer, targetBuffer);
originalByteBufferArray.restore();
throw new TransformationException(e);
}
if (originalByteBuffer.hasRemaining()) { // Keep working with the current source ByteBuffer
i--;
}
}
assert !originalMessage.hasRemaining();
if (restore) {
originalByteBufferArray.restore();
}
originalByteBufferArray.recycle();
if (transformationResult != null) { // transformation error case
disposeBuffers(currentTargetBuffer, targetBuffer);
return transformationResult;
}
return TransformationResult.createCompletedResult(
allowDispose(targetBuffer), originalMessage);
}
private static void disposeBuffers(final Buffer currentBuffer, final Buffer bigBuffer) {
if (currentBuffer != null) {
currentBuffer.dispose();
}
if (bigBuffer != null) {
bigBuffer.allowBufferDispose(true);
if (bigBuffer.isComposite()) {
((CompositeBuffer) bigBuffer).allowInternalBuffersDispose(true);
}
bigBuffer.dispose();
}
}
private static Buffer allowDispose(final Buffer buffer) {
buffer.allowBufferDispose(true);
if (buffer.isComposite()) {
((CompositeBuffer) buffer).allowInternalBuffersDispose(true);
}
return buffer;
}
@Override
public boolean hasInputRemaining(AttributeStorage storage, Buffer input) {
return input != null && input.hasRemaining();
}
}
