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/*
* Copyright 2013 The Android Open Source Project
*
* 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.
*/
/*
* Copyright 2016 The Netty Project
*
* The Netty Project licenses this file to you 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 org.conscrypt;
import static java.lang.Math.max;
import static java.lang.Math.min;
import static javax.net.ssl.SSLEngineResult.HandshakeStatus.FINISHED;
import static javax.net.ssl.SSLEngineResult.HandshakeStatus.NEED_UNWRAP;
import static javax.net.ssl.SSLEngineResult.HandshakeStatus.NEED_WRAP;
import static javax.net.ssl.SSLEngineResult.HandshakeStatus.NOT_HANDSHAKING;
import static javax.net.ssl.SSLEngineResult.Status.BUFFER_OVERFLOW;
import static javax.net.ssl.SSLEngineResult.Status.BUFFER_UNDERFLOW;
import static javax.net.ssl.SSLEngineResult.Status.CLOSED;
import static javax.net.ssl.SSLEngineResult.Status.OK;
import static org.conscrypt.NativeConstants.SSL3_RT_HEADER_LENGTH;
import static org.conscrypt.NativeConstants.SSL3_RT_MAX_PACKET_SIZE;
import static org.conscrypt.NativeConstants.SSL3_RT_MAX_PLAIN_LENGTH;
import static org.conscrypt.NativeConstants.SSL_CB_HANDSHAKE_DONE;
import static org.conscrypt.NativeConstants.SSL_CB_HANDSHAKE_START;
import static org.conscrypt.NativeConstants.SSL_ERROR_WANT_READ;
import static org.conscrypt.NativeConstants.SSL_ERROR_WANT_WRITE;
import static org.conscrypt.NativeConstants.SSL_ERROR_ZERO_RETURN;
import static org.conscrypt.Preconditions.checkArgument;
import static org.conscrypt.Preconditions.checkNotNull;
import static org.conscrypt.Preconditions.checkPositionIndexes;
import static org.conscrypt.SSLUtils.EngineStates.STATE_CLOSED;
import static org.conscrypt.SSLUtils.EngineStates.STATE_CLOSED_INBOUND;
import static org.conscrypt.SSLUtils.EngineStates.STATE_CLOSED_OUTBOUND;
import static org.conscrypt.SSLUtils.EngineStates.STATE_HANDSHAKE_COMPLETED;
import static org.conscrypt.SSLUtils.EngineStates.STATE_HANDSHAKE_STARTED;
import static org.conscrypt.SSLUtils.EngineStates.STATE_MODE_SET;
import static org.conscrypt.SSLUtils.EngineStates.STATE_NEW;
import static org.conscrypt.SSLUtils.EngineStates.STATE_READY;
import static org.conscrypt.SSLUtils.EngineStates.STATE_READY_HANDSHAKE_CUT_THROUGH;
import static org.conscrypt.SSLUtils.calculateOutNetBufSize;
import static org.conscrypt.SSLUtils.toSSLHandshakeException;
import java.io.EOFException;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.nio.ByteBuffer;
import java.nio.ReadOnlyBufferException;
import java.security.InvalidKeyException;
import java.security.PrivateKey;
import java.security.cert.CertificateEncodingException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.security.interfaces.ECKey;
import java.security.spec.ECParameterSpec;
import javax.crypto.SecretKey;
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.SSLException;
import javax.net.ssl.SSLHandshakeException;
import javax.net.ssl.SSLParameters;
import javax.net.ssl.SSLSession;
import javax.net.ssl.X509ExtendedKeyManager;
import javax.net.ssl.X509KeyManager;
import javax.net.ssl.X509TrustManager;
import javax.security.auth.x500.X500Principal;
import org.conscrypt.ExternalSession.Provider;
import org.conscrypt.NativeRef.SSL_SESSION;
import org.conscrypt.NativeSsl.BioWrapper;
/**
* Implements the {@link SSLEngine} API using OpenSSL's non-blocking interfaces.
*/
final class ConscryptEngine extends AbstractConscryptEngine implements NativeCrypto.SSLHandshakeCallbacks,
SSLParametersImpl.AliasChooser,
SSLParametersImpl.PSKCallbacks {
private static final SSLEngineResult NEED_UNWRAP_OK =
new SSLEngineResult(OK, NEED_UNWRAP, 0, 0);
private static final SSLEngineResult NEED_UNWRAP_CLOSED =
new SSLEngineResult(CLOSED, NEED_UNWRAP, 0, 0);
private static final SSLEngineResult NEED_WRAP_OK = new SSLEngineResult(OK, NEED_WRAP, 0, 0);
private static final SSLEngineResult NEED_WRAP_CLOSED =
new SSLEngineResult(CLOSED, NEED_WRAP, 0, 0);
private static final SSLEngineResult CLOSED_NOT_HANDSHAKING =
new SSLEngineResult(CLOSED, NOT_HANDSHAKING, 0, 0);
private static BufferAllocator defaultBufferAllocator = null;
private final SSLParametersImpl sslParameters;
private BufferAllocator bufferAllocator = defaultBufferAllocator;
/**
* A lazy-created direct buffer used as a bridge between heap buffers provided by the
* application and JNI. This avoids the overhead of calling JNI with heap buffers.
* Used only when no {@link #bufferAllocator} has been provided.
*/
private ByteBuffer lazyDirectBuffer;
/**
* Hostname used with the TLS extension SNI hostname.
*/
private String peerHostname;
// @GuardedBy("ssl");
private int state = STATE_NEW;
private boolean handshakeFinished;
/**
* Wrapper around the underlying SSL object.
*/
private final NativeSsl ssl;
/**
* The BIO used for reading/writing encrypted bytes.
*/
// @GuardedBy("ssl");
private final BioWrapper networkBio;
/**
* Set during startHandshake.
*/
private final ActiveSession activeSession;
/**
* A snapshot of the active session when the engine was closed.
*/
private SessionSnapshot closedSession;
/**
* The session object exposed externally from this class.
*/
private final SSLSession externalSession =
Platform.wrapSSLSession(new ExternalSession(new Provider() {
@Override
public ConscryptSession provideSession() {
return ConscryptEngine.this.provideSession();
}
}));
/**
* Private key for the TLS Channel ID extension. This field is client-side only. Set during
* startHandshake.
*/
private OpenSSLKey channelIdPrivateKey;
private int maxSealOverhead;
private HandshakeListener handshakeListener;
private final ByteBuffer[] singleSrcBuffer = new ByteBuffer[1];
private final ByteBuffer[] singleDstBuffer = new ByteBuffer[1];
private final PeerInfoProvider peerInfoProvider;
private SSLException handshakeException;
ConscryptEngine(SSLParametersImpl sslParameters) {
this.sslParameters = sslParameters;
peerInfoProvider = PeerInfoProvider.nullProvider();
this.ssl = newSsl(sslParameters, this);
this.networkBio = ssl.newBio();
activeSession = new ActiveSession(ssl, sslParameters.getSessionContext());
}
ConscryptEngine(String host, int port, SSLParametersImpl sslParameters) {
this.sslParameters = sslParameters;
this.peerInfoProvider = PeerInfoProvider.forHostAndPort(host, port);
this.ssl = newSsl(sslParameters, this);
this.networkBio = ssl.newBio();
activeSession = new ActiveSession(ssl, sslParameters.getSessionContext());
}
ConscryptEngine(SSLParametersImpl sslParameters, PeerInfoProvider peerInfoProvider) {
this.sslParameters = sslParameters;
this.peerInfoProvider = checkNotNull(peerInfoProvider, "peerInfoProvider");
this.ssl = newSsl(sslParameters, this);
this.networkBio = ssl.newBio();
activeSession = new ActiveSession(ssl, sslParameters.getSessionContext());
}
private static NativeSsl newSsl(SSLParametersImpl sslParameters, ConscryptEngine engine) {
try {
return NativeSsl.newInstance(sslParameters, engine, engine, engine);
} catch (SSLException e) {
throw new RuntimeException(e);
}
}
/**
* Configures the default {@link BufferAllocator} to be used by all future
* {@link SSLEngine} instances from this provider.
*/
static void setDefaultBufferAllocator(BufferAllocator bufferAllocator) {
defaultBufferAllocator = bufferAllocator;
}
@Override
void setBufferAllocator(BufferAllocator bufferAllocator) {
synchronized (ssl) {
if (isHandshakeStarted()) {
throw new IllegalStateException(
"Could not set buffer allocator after the initial handshake has begun.");
}
this.bufferAllocator = bufferAllocator;
}
}
/**
* Returns the maximum overhead, in bytes, of sealing a record with SSL.
*/
@Override
int maxSealOverhead() {
return maxSealOverhead;
}
/**
* Enables/disables TLS Channel ID for this server engine.
*
* This method needs to be invoked before the handshake starts.
*
* @throws IllegalStateException if this is a client engine or if the handshake has already
* started.
*/
@Override
void setChannelIdEnabled(boolean enabled) {
synchronized (ssl) {
if (getUseClientMode()) {
throw new IllegalStateException("Not allowed in client mode");
}
if (isHandshakeStarted()) {
throw new IllegalStateException(
"Could not enable/disable Channel ID after the initial handshake has begun.");
}
sslParameters.channelIdEnabled = enabled;
}
}
/**
* Gets the TLS Channel ID for this server engine. Channel ID is only available once the
* handshake completes.
*
* @return channel ID or {@code null} if not available.
*
* @throws IllegalStateException if this is a client engine or if the handshake has not yet
* completed.
* @throws SSLException if channel ID is available but could not be obtained.
*/
@Override
byte[] getChannelId() throws SSLException {
synchronized (ssl) {
if (getUseClientMode()) {
throw new IllegalStateException("Not allowed in client mode");
}
if (isHandshakeStarted()) {
throw new IllegalStateException(
"Channel ID is only available after handshake completes");
}
return ssl.getTlsChannelId();
}
}
/**
* Sets the {@link PrivateKey} to be used for TLS Channel ID by this client engine.
*
*
This method needs to be invoked before the handshake starts.
*
* @param privateKey private key (enables TLS Channel ID) or {@code null} for no key (disables
* TLS Channel ID). The private key must be an Elliptic Curve (EC) key based on the NIST
* P-256 curve (aka SECG secp256r1 or ANSI X9.62 prime256v1).
*
* @throws IllegalStateException if this is a server engine or if the handshake has already
* started.
*/
@Override
void setChannelIdPrivateKey(PrivateKey privateKey) {
if (!getUseClientMode()) {
throw new IllegalStateException("Not allowed in server mode");
}
synchronized (ssl) {
if (isHandshakeStarted()) {
throw new IllegalStateException("Could not change Channel ID private key "
+ "after the initial handshake has begun.");
}
if (privateKey == null) {
sslParameters.channelIdEnabled = false;
channelIdPrivateKey = null;
return;
}
sslParameters.channelIdEnabled = true;
try {
ECParameterSpec ecParams = null;
if (privateKey instanceof ECKey) {
ecParams = ((ECKey) privateKey).getParams();
}
if (ecParams == null) {
// Assume this is a P-256 key, as specified in the contract of this method.
ecParams =
OpenSSLECGroupContext.getCurveByName("prime256v1").getECParameterSpec();
}
channelIdPrivateKey =
OpenSSLKey.fromECPrivateKeyForTLSStackOnly(privateKey, ecParams);
} catch (InvalidKeyException e) {
// Will have error in startHandshake
}
}
}
/**
* Sets the listener for the completion of the TLS handshake.
*/
@Override
void setHandshakeListener(HandshakeListener handshakeListener) {
synchronized (ssl) {
if (isHandshakeStarted()) {
throw new IllegalStateException(
"Handshake listener must be set before starting the handshake.");
}
this.handshakeListener = handshakeListener;
}
}
private boolean isHandshakeStarted() {
switch (state) {
case STATE_NEW:
case STATE_MODE_SET:
return false;
default:
return true;
}
}
/**
* This method enables Server Name Indication (SNI) and overrides the {@link PeerInfoProvider}
* supplied during engine creation. If the hostname is not a valid SNI hostname, the SNI
* extension will be omitted from the handshake.
*/
@Override
void setHostname(String hostname) {
sslParameters.setUseSni(hostname != null);
this.peerHostname = hostname;
}
/**
* Returns the hostname from {@link #setHostname(String)} or supplied by the
* {@link PeerInfoProvider} upon creation. No DNS resolution is attempted before
* returning the hostname.
*/
@Override
String getHostname() {
return peerHostname != null ? peerHostname : peerInfoProvider.getHostname();
}
@Override
public String getPeerHost() {
return peerHostname != null ? peerHostname : peerInfoProvider.getHostnameOrIP();
}
@Override
public int getPeerPort() {
return peerInfoProvider.getPort();
}
@Override
public void beginHandshake() throws SSLException {
synchronized (ssl) {
beginHandshakeInternal();
}
}
private void beginHandshakeInternal() throws SSLException {
switch (state) {
case STATE_NEW: {
throw new IllegalStateException("Client/server mode must be set before handshake");
}
case STATE_MODE_SET: {
// We know what mode to handshake in but have not started the handshake, proceed
break;
}
case STATE_CLOSED_INBOUND:
case STATE_CLOSED_OUTBOUND:
case STATE_CLOSED:
throw new IllegalStateException("Engine has already been closed");
default:
// We've already started the handshake, just return
return;
}
transitionTo(STATE_HANDSHAKE_STARTED);
boolean releaseResources = true;
try {
// Prepare the SSL object for the handshake.
ssl.initialize(getHostname(), channelIdPrivateKey);
// For clients, offer to resume a previously cached session to avoid the
// full TLS handshake.
if (getUseClientMode()) {
NativeSslSession cachedSession = clientSessionContext().getCachedSession(
getHostname(), getPeerPort(), sslParameters);
if (cachedSession != null) {
cachedSession.offerToResume(ssl);
}
}
maxSealOverhead = ssl.getMaxSealOverhead();
handshake();
releaseResources = false;
} catch (IOException e) {
// Write CCS errors to EventLog
String message = e.getMessage();
// Must match error reason string of SSL_R_UNEXPECTED_CCS (in ssl/ssl_err.c)
if (message.contains("unexpected CCS")) {
String logMessage = String.format("ssl_unexpected_ccs: host=%s", getPeerHost());
Platform.logEvent(logMessage);
}
throw SSLUtils.toSSLHandshakeException(e);
} finally {
if (releaseResources) {
closeAndFreeResources();
}
}
}
@Override
public void closeInbound() throws SSLException {
synchronized (ssl) {
if (state == STATE_CLOSED || state == STATE_CLOSED_INBOUND) {
return;
}
if (isOutboundDone()) {
closeAndFreeResources();
} else {
transitionTo(STATE_CLOSED_INBOUND);
}
}
}
@Override
public void closeOutbound() {
synchronized (ssl) {
if (state == STATE_CLOSED || state == STATE_CLOSED_OUTBOUND) {
return;
}
if (isHandshakeStarted()) {
sendSSLShutdown();
if (isInboundDone()) {
closeAndFreeResources();
} else {
transitionTo(STATE_CLOSED_OUTBOUND);
}
} else {
// Never started the handshake. Just close now.
closeAndFreeResources();
}
}
}
@Override
public Runnable getDelegatedTask() {
// This implementation doesn't use any delegated tasks.
return null;
}
@Override
public String[] getEnabledCipherSuites() {
return sslParameters.getEnabledCipherSuites();
}
@Override
public String[] getEnabledProtocols() {
return sslParameters.getEnabledProtocols();
}
@Override
public boolean getEnableSessionCreation() {
return sslParameters.getEnableSessionCreation();
}
@Override
public SSLParameters getSSLParameters() {
SSLParameters params = super.getSSLParameters();
Platform.getSSLParameters(params, sslParameters, this);
return params;
}
@Override
public void setSSLParameters(SSLParameters p) {
super.setSSLParameters(p);
Platform.setSSLParameters(p, sslParameters, this);
}
@Override
public HandshakeStatus getHandshakeStatus() {
synchronized (ssl) {
return getHandshakeStatusInternal();
}
}
private HandshakeStatus getHandshakeStatusInternal() {
if (handshakeFinished) {
return HandshakeStatus.NOT_HANDSHAKING;
}
switch (state) {
case STATE_HANDSHAKE_STARTED:
return pendingStatus(pendingOutboundEncryptedBytes());
case STATE_HANDSHAKE_COMPLETED:
return HandshakeStatus.NEED_WRAP;
case STATE_NEW:
case STATE_MODE_SET:
case STATE_CLOSED:
case STATE_CLOSED_INBOUND:
case STATE_CLOSED_OUTBOUND:
case STATE_READY:
case STATE_READY_HANDSHAKE_CUT_THROUGH:
return HandshakeStatus.NOT_HANDSHAKING;
default:
break;
}
throw new IllegalStateException("Unexpected engine state: " + state);
}
private int pendingOutboundEncryptedBytes() {
return networkBio.getPendingWrittenBytes();
}
private int pendingInboundCleartextBytes() {
return ssl.getPendingReadableBytes();
}
private static SSLEngineResult.HandshakeStatus pendingStatus(int pendingOutboundBytes) {
// Depending on if there is something left in the BIO we need to WRAP or UNWRAP
return pendingOutboundBytes > 0 ? NEED_WRAP : NEED_UNWRAP;
}
@Override
public boolean getNeedClientAuth() {
return sslParameters.getNeedClientAuth();
}
/**
* Work-around to allow this method to be called on older versions of Android.
*/
@Override
SSLSession handshakeSession() {
synchronized (ssl) {
if (state == STATE_HANDSHAKE_STARTED) {
return Platform.wrapSSLSession(new ExternalSession(new Provider() {
@Override
public ConscryptSession provideSession() {
return ConscryptEngine.this.provideHandshakeSession();
}
}));
}
return null;
}
}
@Override
public SSLSession getSession() {
return externalSession;
}
private ConscryptSession provideSession() {
synchronized (ssl) {
if (state == STATE_CLOSED) {
return closedSession != null ? closedSession : SSLNullSession.getNullSession();
}
if (state < STATE_HANDSHAKE_COMPLETED) {
// Return an invalid session with invalid cipher suite of "SSL_NULL_WITH_NULL_NULL"
return SSLNullSession.getNullSession();
}
return activeSession;
}
}
private ConscryptSession provideHandshakeSession() {
synchronized (ssl) {
return state == STATE_HANDSHAKE_STARTED ? activeSession
: SSLNullSession.getNullSession();
}
}
@Override
public String[] getSupportedCipherSuites() {
return NativeCrypto.getSupportedCipherSuites();
}
@Override
public String[] getSupportedProtocols() {
return NativeCrypto.getSupportedProtocols();
}
@Override
public boolean getUseClientMode() {
return sslParameters.getUseClientMode();
}
@Override
public boolean getWantClientAuth() {
return sslParameters.getWantClientAuth();
}
@Override
public boolean isInboundDone() {
synchronized (ssl) {
return state == STATE_CLOSED || state == STATE_CLOSED_INBOUND
|| ssl.wasShutdownReceived();
}
}
@Override
public boolean isOutboundDone() {
synchronized (ssl) {
return state == STATE_CLOSED || state == STATE_CLOSED_OUTBOUND || ssl.wasShutdownSent();
}
}
@Override
public void setEnabledCipherSuites(String[] suites) {
sslParameters.setEnabledCipherSuites(suites);
}
@Override
public void setEnabledProtocols(String[] protocols) {
sslParameters.setEnabledProtocols(protocols);
}
@Override
public void setEnableSessionCreation(boolean flag) {
sslParameters.setEnableSessionCreation(flag);
}
@Override
public void setNeedClientAuth(boolean need) {
sslParameters.setNeedClientAuth(need);
}
@Override
public void setUseClientMode(boolean mode) {
synchronized (ssl) {
if (isHandshakeStarted()) {
throw new IllegalArgumentException(
"Can not change mode after handshake: state == " + state);
}
transitionTo(STATE_MODE_SET);
sslParameters.setUseClientMode(mode);
}
}
@Override
public void setWantClientAuth(boolean want) {
sslParameters.setWantClientAuth(want);
}
@Override
public SSLEngineResult unwrap(ByteBuffer src, ByteBuffer dst) throws SSLException {
synchronized (ssl) {
try {
return unwrap(singleSrcBuffer(src), singleDstBuffer(dst));
} finally {
resetSingleSrcBuffer();
resetSingleDstBuffer();
}
}
}
@Override
public SSLEngineResult unwrap(ByteBuffer src, ByteBuffer[] dsts) throws SSLException {
synchronized (ssl) {
try {
return unwrap(singleSrcBuffer(src), dsts);
} finally {
resetSingleSrcBuffer();
}
}
}
@Override
public SSLEngineResult unwrap(final ByteBuffer src, final ByteBuffer[] dsts, final int offset,
final int length) throws SSLException {
synchronized (ssl) {
try {
return unwrap(singleSrcBuffer(src), 0, 1, dsts, offset, length);
} finally {
resetSingleSrcBuffer();
}
}
}
@Override
SSLEngineResult unwrap(final ByteBuffer[] srcs, final ByteBuffer[] dsts) throws SSLException {
checkArgument(srcs != null, "srcs is null");
checkArgument(dsts != null, "dsts is null");
return unwrap(srcs, 0, srcs.length, dsts, 0, dsts.length);
}
@Override
SSLEngineResult unwrap(final ByteBuffer[] srcs, int srcsOffset, final int srcsLength,
final ByteBuffer[] dsts, final int dstsOffset, final int dstsLength)
throws SSLException {
checkArgument(srcs != null, "srcs is null");
checkArgument(dsts != null, "dsts is null");
checkPositionIndexes(srcsOffset, srcsOffset + srcsLength, srcs.length);
checkPositionIndexes(dstsOffset, dstsOffset + dstsLength, dsts.length);
// Determine the output capacity.
final int dstLength = calcDstsLength(dsts, dstsOffset, dstsLength);
final int endOffset = dstsOffset + dstsLength;
final int srcsEndOffset = srcsOffset + srcsLength;
final long srcLength = calcSrcsLength(srcs, srcsOffset, srcsEndOffset);
synchronized (ssl) {
switch (state) {
case STATE_MODE_SET:
// Begin the handshake implicitly.
beginHandshakeInternal();
break;
case STATE_CLOSED_INBOUND:
case STATE_CLOSED:
// If the inbound direction is closed. we can't send anymore.
return new SSLEngineResult(Status.CLOSED, getHandshakeStatusInternal(), 0, 0);
case STATE_NEW:
throw new IllegalStateException(
"Client/server mode must be set before calling unwrap");
default:
break;
}
HandshakeStatus handshakeStatus = HandshakeStatus.NOT_HANDSHAKING;
if (!handshakeFinished) {
handshakeStatus = handshake();
if (handshakeStatus == NEED_WRAP) {
return NEED_WRAP_OK;
}
if (state == STATE_CLOSED) {
return NEED_WRAP_CLOSED;
}
// NEED_UNWRAP - just fall through to perform the unwrap.
}
// Consume any source data. Skip this if there are unread cleartext data.
boolean noCleartextDataAvailable = pendingInboundCleartextBytes() <= 0;
int lenRemaining = 0;
if (srcLength > 0 && noCleartextDataAvailable) {
if (srcLength < SSL3_RT_HEADER_LENGTH) {
// Need to be able to read a full TLS header.
return new SSLEngineResult(BUFFER_UNDERFLOW, getHandshakeStatus(), 0, 0);
}
int packetLength = SSLUtils.getEncryptedPacketLength(srcs, srcsOffset);
if (packetLength < 0) {
throw new SSLException("Unable to parse TLS packet header");
}
if (srcLength < packetLength) {
// We either have not enough data to read the packet header or not enough for
// reading the whole packet.
return new SSLEngineResult(BUFFER_UNDERFLOW, getHandshakeStatus(), 0, 0);
}
// Limit the amount of data to be read to a single packet.
lenRemaining = packetLength;
} else if (noCleartextDataAvailable) {
// No pending data and nothing provided as input. Need more data.
return new SSLEngineResult(BUFFER_UNDERFLOW, getHandshakeStatus(), 0, 0);
}
// Write all of the encrypted source data to the networkBio
int bytesConsumed = 0;
if (lenRemaining > 0 && srcsOffset < srcsEndOffset) {
do {
ByteBuffer src = srcs[srcsOffset];
int remaining = src.remaining();
if (remaining == 0) {
// We must skip empty buffers as BIO_write will return 0 if asked to
// write something with length 0.
srcsOffset++;
continue;
}
// Write the source encrypted data to the networkBio.
int written = writeEncryptedData(src, min(lenRemaining, remaining));
if (written > 0) {
bytesConsumed += written;
lenRemaining -= written;
if (lenRemaining == 0) {
// A whole packet has been consumed.
break;
}
if (written == remaining) {
srcsOffset++;
} else {
// We were not able to write everything into the BIO so break the
// write loop as otherwise we will produce an error on the next
// write attempt, which will trigger a SSL.clearError() later.
break;
}
} else {
// BIO_write returned a negative or zero number, this means we could not
// complete the write operation and should retry later.
// We ignore BIO_* errors here as we use in memory BIO anyway and will
// do another SSL_* call later on in which we will produce an exception
// in case of an error
NativeCrypto.SSL_clear_error();
break;
}
} while (srcsOffset < srcsEndOffset);
}
// Now read any available plaintext data.
int bytesProduced = 0;
try {
if (dstLength > 0) {
// Write decrypted data to dsts buffers
for (int idx = dstsOffset; idx < endOffset; ++idx) {
ByteBuffer dst = dsts[idx];
if (!dst.hasRemaining()) {
continue;
}
int bytesRead = readPlaintextData(dst);
if (bytesRead > 0) {
bytesProduced += bytesRead;
if (dst.hasRemaining()) {
// We haven't filled this buffer fully, break out of the loop
// and determine the correct response status below.
break;
}
} else {
switch (bytesRead) {
case -SSL_ERROR_WANT_READ:
case -SSL_ERROR_WANT_WRITE: {
return newResult(bytesConsumed, bytesProduced, handshakeStatus);
}
case -SSL_ERROR_ZERO_RETURN: {
// We received a close_notify from the peer, so mark the
// inbound direction as closed and shut down the SSL object
closeInbound();
sendSSLShutdown();
return new SSLEngineResult(Status.CLOSED,
pendingOutboundEncryptedBytes() > 0
? NEED_WRAP : NOT_HANDSHAKING,
bytesConsumed, bytesProduced);
}
default: {
// Should never get here.
sendSSLShutdown();
throw newSslExceptionWithMessage("SSL_read");
}
}
}
}
} else {
// If the capacity of all destination buffers is 0 we need to trigger a SSL_read
// anyway to ensure everything is flushed in the BIO pair and so we can detect
// it in the pendingInboundCleartextBytes() call.
ssl.forceRead();
}
} catch (SSLException e) {
if (pendingOutboundEncryptedBytes() > 0) {
// We need to flush any pending bytes to the remote endpoint in case
// there is an alert that needs to be propagated.
if (!handshakeFinished && handshakeException == null) {
// Save the handshake exception. We will re-throw during the next
// handshake.
handshakeException = e;
}
return new SSLEngineResult(OK, NEED_WRAP, bytesConsumed, bytesProduced);
}
// Nothing to write, just shutdown and throw the exception.
sendSSLShutdown();
throw convertException(e);
} catch (InterruptedIOException e) {
return newResult(bytesConsumed, bytesProduced, handshakeStatus);
} catch (EOFException e) {
closeAll();
throw convertException(e);
} catch (IOException e) {
sendSSLShutdown();
throw convertException(e);
}
// There won't be any application data until we're done handshaking.
// We first check handshakeFinished to eliminate the overhead of extra JNI call if
// possible.
int pendingCleartextBytes = handshakeFinished ? pendingInboundCleartextBytes() : 0;
if (pendingCleartextBytes > 0) {
// We filled all buffers but there is still some data pending in the BIO buffer,
// return BUFFER_OVERFLOW.
return new SSLEngineResult(BUFFER_OVERFLOW,
mayFinishHandshake(handshakeStatus == FINISHED
? handshakeStatus
: getHandshakeStatusInternal()),
bytesConsumed, bytesProduced);
}
return newResult(bytesConsumed, bytesProduced, handshakeStatus);
}
}
private static int calcDstsLength(ByteBuffer[] dsts, int dstsOffset, int dstsLength) {
int capacity = 0;
for (int i = 0; i < dsts.length; i++) {
ByteBuffer dst = dsts[i];
checkArgument(dst != null, "dsts[%d] is null", i);
if (dst.isReadOnly()) {
throw new ReadOnlyBufferException();
}
if (i >= dstsOffset && i < dstsOffset + dstsLength) {
capacity += dst.remaining();
}
}
return capacity;
}
private static long calcSrcsLength(ByteBuffer[] srcs, int srcsOffset, int srcsEndOffset) {
long len = 0;
for (int i = srcsOffset; i < srcsEndOffset; i++) {
ByteBuffer src = srcs[i];
if (src == null) {
throw new IllegalArgumentException("srcs[" + i + "] is null");
}
len += src.remaining();
}
return len;
}
private SSLEngineResult.HandshakeStatus handshake() throws SSLException {
try {
// Only actually perform the handshake if we haven't already just completed it
// via BIO operations.
try {
// First, check to see if we already have a pending alert that needs to be written.
if (handshakeException != null) {
if (pendingOutboundEncryptedBytes() > 0) {
// Need to finish writing the alert to the remote peer.
return NEED_WRAP;
}
// We've finished writing the alert, just throw the exception.
SSLException e = handshakeException;
handshakeException = null;
throw e;
}
int ssl_error_code = ssl.doHandshake();
switch (ssl_error_code) {
case SSL_ERROR_WANT_READ:
return pendingStatus(pendingOutboundEncryptedBytes());
case SSL_ERROR_WANT_WRITE: {
return NEED_WRAP;
}
default: {
// SSL_ERROR_NONE.
}
}
} catch (SSLException e) {
if (pendingOutboundEncryptedBytes() > 0) {
// Delay throwing the exception since we appear to have an outbound alert
// that needs to be written to the remote endpoint.
handshakeException = e;
return NEED_WRAP;
}
// There is no pending alert to write - just shutdown and throw.
sendSSLShutdown();
throw e;
} catch (IOException e) {
sendSSLShutdown();
throw e;
}
// The handshake has completed successfully...
// Update the session from the current state of the SSL object.
activeSession.onPeerCertificateAvailable(getPeerHost(), getPeerPort());
finishHandshake();
return FINISHED;
} catch (Exception e) {
throw toSSLHandshakeException(e);
}
}
private void finishHandshake() throws SSLException {
handshakeFinished = true;
// Notify the listener, if provided.
if (handshakeListener != null) {
handshakeListener.onHandshakeFinished();
}
}
/**
* Write plaintext data to the OpenSSL internal BIO
*
* Calling this function with src.remaining == 0 is undefined.
*/
private int writePlaintextData(final ByteBuffer src, int len) throws SSLException {
try {
final int pos = src.position();
final int sslWrote;
if (src.isDirect()) {
sslWrote = writePlaintextDataDirect(src, pos, len);
} else {
sslWrote = writePlaintextDataHeap(src, pos, len);
}
if (sslWrote > 0) {
src.position(pos + sslWrote);
}
return sslWrote;
} catch (Exception e) {
throw convertException(e);
}
}
private int writePlaintextDataDirect(ByteBuffer src, int pos, int len) throws IOException {
return ssl.writeDirectByteBuffer(directByteBufferAddress(src, pos), len);
}
private int writePlaintextDataHeap(ByteBuffer src, int pos, int len) throws IOException {
AllocatedBuffer allocatedBuffer = null;
try {
final ByteBuffer buffer;
if (bufferAllocator != null) {
allocatedBuffer = bufferAllocator.allocateDirectBuffer(len);
buffer = allocatedBuffer.nioBuffer();
} else {
// We don't have a buffer allocator, but we don't want to send a heap
// buffer to JNI. So lazy-create a direct buffer that we will use from now
// on to copy plaintext data.
buffer = getOrCreateLazyDirectBuffer();
}
// Copy the data to the direct buffer.
int limit = src.limit();
int bytesToWrite = min(len, buffer.remaining());
src.limit(pos + bytesToWrite);
buffer.put(src);
buffer.flip();
// Restore the original position and limit.
src.limit(limit);
src.position(pos);
return writePlaintextDataDirect(buffer, 0, bytesToWrite);
} finally {
if (allocatedBuffer != null) {
// Release the buffer back to the pool.
allocatedBuffer.release();
}
}
}
/**
* Read plaintext data from the OpenSSL internal BIO
*/
private int readPlaintextData(final ByteBuffer dst) throws IOException {
try {
final int pos = dst.position();
final int limit = dst.limit();
final int len = min(SSL3_RT_MAX_PACKET_SIZE, limit - pos);
if (dst.isDirect()) {
int bytesRead = readPlaintextDataDirect(dst, pos, len);
if (bytesRead > 0) {
dst.position(pos + bytesRead);
}
return bytesRead;
}
// The heap method updates the dst position automatically.
return readPlaintextDataHeap(dst, len);
} catch (CertificateException e) {
throw convertException(e);
}
}
private int readPlaintextDataDirect(ByteBuffer dst, int pos, int len)
throws IOException, CertificateException {
return ssl.readDirectByteBuffer(directByteBufferAddress(dst, pos), len);
}
private int readPlaintextDataHeap(ByteBuffer dst, int len)
throws IOException, CertificateException {
AllocatedBuffer allocatedBuffer = null;
try {
final ByteBuffer buffer;
if (bufferAllocator != null) {
allocatedBuffer = bufferAllocator.allocateDirectBuffer(len);
buffer = allocatedBuffer.nioBuffer();
} else {
// We don't have a buffer allocator, but we don't want to send a heap
// buffer to JNI. So lazy-create a direct buffer that we will use from now
// on to copy plaintext data.
buffer = getOrCreateLazyDirectBuffer();
}
// Read the data to the direct buffer.
int bytesToRead = min(len, buffer.remaining());
int bytesRead = readPlaintextDataDirect(buffer, 0, bytesToRead);
if (bytesRead > 0) {
// Copy the data to the heap buffer.
buffer.position(bytesRead);
buffer.flip();
dst.put(buffer);
}
return bytesRead;
} finally {
if (allocatedBuffer != null) {
// Release the buffer back to the pool.
allocatedBuffer.release();
}
}
}
private SSLException convertException(Throwable e) {
if (e instanceof SSLHandshakeException || !handshakeFinished) {
return SSLUtils.toSSLHandshakeException(e);
}
return SSLUtils.toSSLException(e);
}
/**
* Write encrypted data to the OpenSSL network BIO.
*/
private int writeEncryptedData(final ByteBuffer src, int len) throws SSLException {
try {
final int pos = src.position();
final int bytesWritten;
if (src.isDirect()) {
bytesWritten = writeEncryptedDataDirect(src, pos, len);
} else {
bytesWritten = writeEncryptedDataHeap(src, pos, len);
}
if (bytesWritten > 0) {
src.position(pos + bytesWritten);
}
return bytesWritten;
} catch (IOException e) {
throw new SSLException(e);
}
}
private int writeEncryptedDataDirect(ByteBuffer src, int pos, int len) throws IOException {
return networkBio.writeDirectByteBuffer(directByteBufferAddress(src, pos), len);
}
private int writeEncryptedDataHeap(ByteBuffer src, int pos, int len) throws IOException {
AllocatedBuffer allocatedBuffer = null;
try {
final ByteBuffer buffer;
if (bufferAllocator != null) {
allocatedBuffer = bufferAllocator.allocateDirectBuffer(len);
buffer = allocatedBuffer.nioBuffer();
} else {
// We don't have a buffer allocator, but we don't want to send a heap
// buffer to JNI. So lazy-create a direct buffer that we will use from now
// on to copy encrypted packets.
buffer = getOrCreateLazyDirectBuffer();
}
int limit = src.limit();
int bytesToCopy = min(min(limit - pos, len), buffer.remaining());
src.limit(pos + bytesToCopy);
buffer.put(src);
// Restore the original limit.
src.limit(limit);
// Reset the original position on the source buffer.
src.position(pos);
int bytesWritten = writeEncryptedDataDirect(buffer, 0, bytesToCopy);
// Restore the original position.
src.position(pos);
return bytesWritten;
} finally {
if (allocatedBuffer != null) {
// Release the buffer back to the pool.
allocatedBuffer.release();
}
}
}
private ByteBuffer getOrCreateLazyDirectBuffer() {
if (lazyDirectBuffer == null) {
lazyDirectBuffer = ByteBuffer.allocateDirect(
max(SSL3_RT_MAX_PLAIN_LENGTH, SSL3_RT_MAX_PACKET_SIZE));
}
lazyDirectBuffer.clear();
return lazyDirectBuffer;
}
private long directByteBufferAddress(ByteBuffer directBuffer, int pos) {
return NativeCrypto.getDirectBufferAddress(directBuffer) + pos;
}
private SSLEngineResult readPendingBytesFromBIO(ByteBuffer dst, int bytesConsumed,
int bytesProduced, SSLEngineResult.HandshakeStatus status) throws SSLException {
try {
// Check to see if the engine wrote data into the network BIO
int pendingNet = pendingOutboundEncryptedBytes();
if (pendingNet > 0) {
// Do we have enough room in dst to write encrypted data?
int capacity = dst.remaining();
if (capacity < pendingNet) {
return new SSLEngineResult(BUFFER_OVERFLOW,
mayFinishHandshake(
status == FINISHED ? status : getHandshakeStatus(pendingNet)),
bytesConsumed, bytesProduced);
}
// Write the pending data from the network BIO into the dst buffer
int produced = readEncryptedData(dst, pendingNet);
if (produced <= 0) {
// We ignore BIO_* errors here as we use in memory BIO anyway and will do
// another SSL_* call later on in which we will produce an exception in
// case of an error
NativeCrypto.SSL_clear_error();
} else {
bytesProduced += produced;
pendingNet -= produced;
}
return new SSLEngineResult(getEngineStatus(),
mayFinishHandshake(
status == FINISHED ? status : getHandshakeStatus(pendingNet)),
bytesConsumed, bytesProduced);
}
return null;
} catch (Exception e) {
throw convertException(e);
}
}
/**
* Read encrypted data from the OpenSSL network BIO
*/
private int readEncryptedData(final ByteBuffer dst, final int pending) throws SSLException {
try {
int bytesRead = 0;
final int pos = dst.position();
if (dst.remaining() >= pending) {
final int limit = dst.limit();
final int len = min(pending, limit - pos);
if (dst.isDirect()) {
bytesRead = readEncryptedDataDirect(dst, pos, len);
// Need to update the position on the dst buffer.
if (bytesRead > 0) {
dst.position(pos + bytesRead);
}
} else {
// The heap method will update the position on the dst buffer automatically.
bytesRead = readEncryptedDataHeap(dst, len);
}
}
return bytesRead;
} catch (Exception e) {
throw convertException(e);
}
}
private int readEncryptedDataDirect(ByteBuffer dst, int pos, int len) throws IOException {
return networkBio.readDirectByteBuffer(directByteBufferAddress(dst, pos), len);
}
private int readEncryptedDataHeap(ByteBuffer dst, int len) throws IOException {
AllocatedBuffer allocatedBuffer = null;
try {
final ByteBuffer buffer;
if (bufferAllocator != null) {
allocatedBuffer = bufferAllocator.allocateDirectBuffer(len);
buffer = allocatedBuffer.nioBuffer();
} else {
// We don't have a buffer allocator, but we don't want to send a heap
// buffer to JNI. So lazy-create a direct buffer that we will use from now
// on to copy encrypted packets.
buffer = getOrCreateLazyDirectBuffer();
}
int bytesToRead = min(len, buffer.remaining());
int bytesRead = readEncryptedDataDirect(buffer, 0, bytesToRead);
if (bytesRead > 0) {
buffer.position(bytesRead);
buffer.flip();
dst.put(buffer);
}
return bytesRead;
} finally {
if (allocatedBuffer != null) {
// Release the buffer back to the pool.
allocatedBuffer.release();
}
}
}
private SSLEngineResult.HandshakeStatus mayFinishHandshake(
SSLEngineResult.HandshakeStatus status) throws SSLException {
if (!handshakeFinished && status == NOT_HANDSHAKING) {
// If the status was NOT_HANDSHAKING and we not finished the handshake we need to call
// SSL_do_handshake() again
return handshake();
}
return status;
}
private SSLEngineResult.HandshakeStatus getHandshakeStatus(int pending) {
// Check if we are in the initial handshake phase or shutdown phase
return !handshakeFinished ? pendingStatus(pending) : NOT_HANDSHAKING;
}
private SSLEngineResult.Status getEngineStatus() {
switch (state) {
case STATE_CLOSED_INBOUND:
case STATE_CLOSED_OUTBOUND:
case STATE_CLOSED:
return CLOSED;
default:
return OK;
}
}
private void closeAll() throws SSLException {
closeOutbound();
closeInbound();
}
private SSLException newSslExceptionWithMessage(String err) {
if (!handshakeFinished) {
return new SSLException(err);
}
return new SSLHandshakeException(err);
}
private SSLEngineResult newResult(int bytesConsumed, int bytesProduced,
SSLEngineResult.HandshakeStatus status) throws SSLException {
return new SSLEngineResult(getEngineStatus(),
mayFinishHandshake(status == FINISHED ? status : getHandshakeStatusInternal()),
bytesConsumed, bytesProduced);
}
@Override
public SSLEngineResult wrap(ByteBuffer src, ByteBuffer dst) throws SSLException {
synchronized (ssl) {
try {
return wrap(singleSrcBuffer(src), dst);
} finally {
resetSingleSrcBuffer();
}
}
}
@Override
public SSLEngineResult wrap(ByteBuffer[] srcs, int srcsOffset, int srcsLength, ByteBuffer dst)
throws SSLException {
checkArgument(srcs != null, "srcs is null");
checkArgument(dst != null, "dst is null");
checkPositionIndexes(srcsOffset, srcsOffset + srcsLength, srcs.length);
if (dst.isReadOnly()) {
throw new ReadOnlyBufferException();
}
synchronized (ssl) {
switch (state) {
case STATE_MODE_SET:
// Begin the handshake implicitly.
beginHandshakeInternal();
break;
case STATE_CLOSED_OUTBOUND:
case STATE_CLOSED:
// We may have pending encrypted bytes from a close_notify alert, so
// try to read them out
SSLEngineResult pendingNetResult =
readPendingBytesFromBIO(dst, 0, 0, HandshakeStatus.NOT_HANDSHAKING);
if (pendingNetResult != null) {
return pendingNetResult;
}
return new SSLEngineResult(Status.CLOSED, getHandshakeStatusInternal(), 0, 0);
case STATE_NEW:
throw new IllegalStateException(
"Client/server mode must be set before calling wrap");
default:
break;
}
// If we haven't completed the handshake yet, just let the caller know.
HandshakeStatus handshakeStatus = HandshakeStatus.NOT_HANDSHAKING;
// Prepare OpenSSL to work in server mode and receive handshake
if (!handshakeFinished) {
handshakeStatus = handshake();
if (handshakeStatus == NEED_UNWRAP) {
return NEED_UNWRAP_OK;
}
if (state == STATE_CLOSED) {
return NEED_UNWRAP_CLOSED;
}
// NEED_WRAP - just fall through to perform the wrap.
}
int srcsLen = 0;
final int endOffset = srcsOffset + srcsLength;
for (int i = srcsOffset; i < endOffset; ++i) {
final ByteBuffer src = srcs[i];
if (src == null) {
throw new IllegalArgumentException("srcs[" + i + "] is null");
}
if (srcsLen == SSL3_RT_MAX_PLAIN_LENGTH) {
continue;
}
srcsLen += src.remaining();
if (srcsLen > SSL3_RT_MAX_PLAIN_LENGTH || srcsLen < 0) {
// If srcLen > MAX_PLAINTEXT_LENGTH or secLen < 0 just set it to
// MAX_PLAINTEXT_LENGTH.
// This also help us to guard against overflow.
// We not break out here as we still need to check for null entries in srcs[].
srcsLen = SSL3_RT_MAX_PLAIN_LENGTH;
}
}
if (dst.remaining() < calculateOutNetBufSize(srcsLen)) {
return new SSLEngineResult(
Status.BUFFER_OVERFLOW, getHandshakeStatusInternal(), 0, 0);
}
int bytesProduced = 0;
int bytesConsumed = 0;
loop:
for (int i = srcsOffset; i < endOffset; ++i) {
final ByteBuffer src = srcs[i];
checkArgument(src != null, "srcs[%d] is null", i);
while (src.hasRemaining()) {
final SSLEngineResult pendingNetResult;
// Write plaintext application data to the SSL engine
int result = writePlaintextData(
src, min(src.remaining(), SSL3_RT_MAX_PLAIN_LENGTH - bytesConsumed));
if (result > 0) {
bytesConsumed += result;
pendingNetResult = readPendingBytesFromBIO(
dst, bytesConsumed, bytesProduced, handshakeStatus);
if (pendingNetResult != null) {
if (pendingNetResult.getStatus() != OK) {
return pendingNetResult;
}
bytesProduced = pendingNetResult.bytesProduced();
}
if (bytesConsumed == SSL3_RT_MAX_PLAIN_LENGTH) {
// If we consumed the maximum amount of bytes for the plaintext length
// break out of the loop and start to fill the dst buffer.
break loop;
}
} else {
int sslError = ssl.getError(result);
switch (sslError) {
case SSL_ERROR_ZERO_RETURN:
// This means the connection was shutdown correctly, close inbound
// and outbound
closeAll();
pendingNetResult = readPendingBytesFromBIO(
dst, bytesConsumed, bytesProduced, handshakeStatus);
return pendingNetResult != null ? pendingNetResult
: CLOSED_NOT_HANDSHAKING;
case SSL_ERROR_WANT_READ:
// If there is no pending data to read from BIO we should go back to
// event loop and try
// to read more data [1]. It is also possible that event loop will
// detect the socket
// has been closed. [1]
// https://www.openssl.org/docs/manmaster/ssl/SSL_write.html
pendingNetResult = readPendingBytesFromBIO(
dst, bytesConsumed, bytesProduced, handshakeStatus);
return pendingNetResult != null
? pendingNetResult
: new SSLEngineResult(getEngineStatus(), NEED_UNWRAP,
bytesConsumed, bytesProduced);
case SSL_ERROR_WANT_WRITE:
// SSL_ERROR_WANT_WRITE typically means that the underlying
// transport is not writable
// and we should set the "want write" flag on the selector and try
// again when the
// underlying transport is writable [1]. However we are not directly
// writing to the
// underlying transport and instead writing to a BIO buffer. The
// OpenSsl documentation
// says we should do the following [1]:
//
// "When using a buffering BIO, like a BIO pair, data must be
// written into or retrieved
// out of the BIO before being able to continue."
//
// So we attempt to drain the BIO buffer below, but if there is no
// data this condition
// is undefined and we assume their is a fatal error with the
// openssl engine and close.
// [1] https://www.openssl.org/docs/manmaster/ssl/SSL_write.html
pendingNetResult = readPendingBytesFromBIO(
dst, bytesConsumed, bytesProduced, handshakeStatus);
return pendingNetResult != null ? pendingNetResult
: NEED_WRAP_CLOSED;
default:
// Everything else is considered as error
sendSSLShutdown();
throw newSslExceptionWithMessage("SSL_write");
}
}
}
}
// We need to check if pendingWrittenBytesInBIO was checked yet, as we may not checked
// if the srcs was
// empty, or only contained empty buffers.
if (bytesConsumed == 0) {
SSLEngineResult pendingNetResult =
readPendingBytesFromBIO(dst, 0, bytesProduced, handshakeStatus);
if (pendingNetResult != null) {
return pendingNetResult;
}
}
// return new SSLEngineResult(OK, getHandshakeStatusInternal(), bytesConsumed,
// bytesProduced);
return newResult(bytesConsumed, bytesProduced, handshakeStatus);
}
}
@Override
public int clientPSKKeyRequested(String identityHint, byte[] identity, byte[] key) {
return ssl.clientPSKKeyRequested(identityHint, identity, key);
}
@Override
public int serverPSKKeyRequested(String identityHint, String identity, byte[] key) {
return ssl.serverPSKKeyRequested(identityHint, identity, key);
}
@Override
public void onSSLStateChange(int type, int val) {
synchronized (ssl) {
switch (type) {
case SSL_CB_HANDSHAKE_START: {
// For clients, this will allow the NEED_UNWRAP status to be
// returned.
transitionTo(STATE_HANDSHAKE_STARTED);
break;
}
case SSL_CB_HANDSHAKE_DONE: {
if (state != STATE_HANDSHAKE_STARTED
&& state != STATE_READY_HANDSHAKE_CUT_THROUGH) {
throw new IllegalStateException(
"Completed handshake while in mode " + state);
}
transitionTo(STATE_HANDSHAKE_COMPLETED);
break;
}
default:
// Ignore
}
}
}
@Override
public void onNewSessionEstablished(long sslSessionNativePtr) {
try {
// Increment the reference count to "take ownership" of the session resource.
NativeCrypto.SSL_SESSION_up_ref(sslSessionNativePtr);
// Create a native reference which will release the SSL_SESSION in its finalizer.
// This constructor will only throw if the native pointer passed in is NULL, which
// BoringSSL guarantees will not happen.
NativeRef.SSL_SESSION ref = new SSL_SESSION(sslSessionNativePtr);
NativeSslSession nativeSession = NativeSslSession.newInstance(ref, activeSession);
// Cache the newly established session.
AbstractSessionContext ctx = sessionContext();
ctx.cacheSession(nativeSession);
} catch (Exception ignored) {
// Ignore.
}
}
@Override
public long serverSessionRequested(byte[] id) {
// TODO(nathanmittler): Implement server-side caching for TLS < 1.3
return 0;
}
@Override
public void verifyCertificateChain(byte[][] certChain, String authMethod)
throws CertificateException {
try {
if (certChain == null || certChain.length == 0) {
throw new CertificateException("Peer sent no certificate");
}
X509Certificate[] peerCertChain = SSLUtils.decodeX509CertificateChain(certChain);
X509TrustManager x509tm = sslParameters.getX509TrustManager();
if (x509tm == null) {
throw new CertificateException("No X.509 TrustManager");
}
// Update the peer information on the session.
activeSession.onPeerCertificatesReceived(getPeerHost(), getPeerPort(), peerCertChain);
if (getUseClientMode()) {
Platform.checkServerTrusted(x509tm, peerCertChain, authMethod, this);
} else {
String authType = peerCertChain[0].getPublicKey().getAlgorithm();
Platform.checkClientTrusted(x509tm, peerCertChain, authType, this);
}
} catch (CertificateException e) {
throw e;
} catch (Exception e) {
throw new CertificateException(e);
}
}
@Override
public void clientCertificateRequested(byte[] keyTypeBytes, int[] signatureAlgs,
byte[][] asn1DerEncodedPrincipals)
throws CertificateEncodingException, SSLException {
ssl.chooseClientCertificate(keyTypeBytes, signatureAlgs, asn1DerEncodedPrincipals);
}
private void sendSSLShutdown() {
try {
ssl.shutdown();
} catch (IOException ignored) {
// TODO: The RI ignores close failures in SSLSocket, but need to
// investigate whether it does for SSLEngine.
}
}
private void closeAndFreeResources() {
transitionTo(STATE_CLOSED);
if (!ssl.isClosed()) {
ssl.close();
networkBio.close();
}
}
@Override
protected void finalize() throws Throwable {
try {
transitionTo(STATE_CLOSED);
} finally {
super.finalize();
}
}
@Override
public String chooseServerAlias(X509KeyManager keyManager, String keyType) {
if (keyManager instanceof X509ExtendedKeyManager) {
X509ExtendedKeyManager ekm = (X509ExtendedKeyManager) keyManager;
return ekm.chooseEngineServerAlias(keyType, null, this);
} else {
return keyManager.chooseServerAlias(keyType, null, null);
}
}
@Override
public String chooseClientAlias(
X509KeyManager keyManager, X500Principal[] issuers, String[] keyTypes) {
if (keyManager instanceof X509ExtendedKeyManager) {
X509ExtendedKeyManager ekm = (X509ExtendedKeyManager) keyManager;
return ekm.chooseEngineClientAlias(keyTypes, issuers, this);
} else {
return keyManager.chooseClientAlias(keyTypes, issuers, null);
}
}
@Override
@SuppressWarnings("deprecation") // PSKKeyManager is deprecated, but in our own package
public String chooseServerPSKIdentityHint(PSKKeyManager keyManager) {
return keyManager.chooseServerKeyIdentityHint(this);
}
@Override
@SuppressWarnings("deprecation") // PSKKeyManager is deprecated, but in our own package
public String chooseClientPSKIdentity(PSKKeyManager keyManager, String identityHint) {
return keyManager.chooseClientKeyIdentity(identityHint, this);
}
@Override
@SuppressWarnings("deprecation") // PSKKeyManager is deprecated, but in our own package
public SecretKey getPSKKey(PSKKeyManager keyManager, String identityHint, String identity) {
return keyManager.getKey(identityHint, identity, this);
}
/**
* This method enables session ticket support.
*
* @param useSessionTickets True to enable session tickets
*/
@Override
void setUseSessionTickets(boolean useSessionTickets) {
sslParameters.setUseSessionTickets(useSessionTickets);
}
@Override
String[] getApplicationProtocols() {
return sslParameters.getApplicationProtocols();
}
@Override
void setApplicationProtocols(String[] protocols) {
sslParameters.setApplicationProtocols(protocols);
}
@Override
void setApplicationProtocolSelector(ApplicationProtocolSelector selector) {
setApplicationProtocolSelector(
selector == null ? null : new ApplicationProtocolSelectorAdapter(this, selector));
}
@Override
byte[] getTlsUnique() {
return ssl.getTlsUnique();
}
@Override
byte[] exportKeyingMaterial(String label, byte[] context, int length) throws SSLException {
synchronized (ssl) {
if (state < STATE_HANDSHAKE_COMPLETED || state == STATE_CLOSED) {
return null;
}
}
return ssl.exportKeyingMaterial(label, context, length);
}
void setApplicationProtocolSelector(ApplicationProtocolSelectorAdapter adapter) {
sslParameters.setApplicationProtocolSelector(adapter);
}
@Override
public String getApplicationProtocol() {
return SSLUtils.toProtocolString(ssl.getApplicationProtocol());
}
@Override
public String getHandshakeApplicationProtocol() {
synchronized (ssl) {
return state == STATE_HANDSHAKE_STARTED ? getApplicationProtocol() : null;
}
}
private ByteBuffer[] singleSrcBuffer(ByteBuffer src) {
singleSrcBuffer[0] = src;
return singleSrcBuffer;
}
private void resetSingleSrcBuffer() {
singleSrcBuffer[0] = null;
}
private ByteBuffer[] singleDstBuffer(ByteBuffer src) {
singleDstBuffer[0] = src;
return singleDstBuffer;
}
private void resetSingleDstBuffer() {
singleDstBuffer[0] = null;
}
private ClientSessionContext clientSessionContext() {
return sslParameters.getClientSessionContext();
}
private AbstractSessionContext sessionContext() {
return sslParameters.getSessionContext();
}
private void transitionTo(int newState) {
switch (newState) {
case STATE_HANDSHAKE_STARTED: {
handshakeFinished = false;
break;
}
case STATE_CLOSED: {
if (!ssl.isClosed() && state >= STATE_HANDSHAKE_STARTED && state < STATE_CLOSED ) {
closedSession = new SessionSnapshot(activeSession);
}
break;
}
default: {
break;
}
}
// Update the state
this.state = newState;
}
}