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/*
* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package org.openeuler.sun.security.ssl;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.Security;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLProtocolException;
import javax.net.ssl.SSLSocket;
import org.openeuler.sun.security.ssl.SSLExtension.ExtensionConsumer;
import org.openeuler.sun.security.ssl.SSLExtension.SSLExtensionSpec;
import org.openeuler.sun.security.ssl.SSLHandshake.HandshakeMessage;
/**
* Pack of the "application_layer_protocol_negotiation" extensions [RFC 7301].
*/
final class AlpnExtension {
static final HandshakeProducer chNetworkProducer = new CHAlpnProducer();
static final ExtensionConsumer chOnLoadConsumer = new CHAlpnConsumer();
static final HandshakeAbsence chOnLoadAbsence = new CHAlpnAbsence();
static final HandshakeProducer shNetworkProducer = new SHAlpnProducer();
static final ExtensionConsumer shOnLoadConsumer = new SHAlpnConsumer();
static final HandshakeAbsence shOnLoadAbsence = new SHAlpnAbsence();
// Note: we reuse ServerHello operations for EncryptedExtensions for now.
// Please be careful about any code or specification changes in the future.
static final HandshakeProducer eeNetworkProducer = new SHAlpnProducer();
static final ExtensionConsumer eeOnLoadConsumer = new SHAlpnConsumer();
static final HandshakeAbsence eeOnLoadAbsence = new SHAlpnAbsence();
static final SSLStringizer alpnStringizer = new AlpnStringizer();
// Encoding Charset to convert between String and byte[]
static final Charset alpnCharset;
static {
String alpnCharsetString = AccessController.doPrivileged(
(PrivilegedAction) ()
-> Security.getProperty("jdk.tls.alpnCharset"));
if ((alpnCharsetString == null)
|| (alpnCharsetString.length() == 0)) {
alpnCharsetString = "ISO_8859_1";
}
alpnCharset = Charset.forName(alpnCharsetString);
}
/**
* The "application_layer_protocol_negotiation" extension.
*
* See RFC 7301 for the specification of this extension.
*/
static final class AlpnSpec implements SSLExtensionSpec {
final List applicationProtocols;
private AlpnSpec(String[] applicationProtocols) {
this.applicationProtocols = Collections.unmodifiableList(
Arrays.asList(applicationProtocols));
}
private AlpnSpec(ByteBuffer buffer) throws IOException {
// ProtocolName protocol_name_list<2..2^16-1>, RFC 7301.
if (buffer.remaining() < 2) {
throw new SSLProtocolException(
"Invalid application_layer_protocol_negotiation: " +
"insufficient data (length=" + buffer.remaining() + ")");
}
int listLen = Record.getInt16(buffer);
if (listLen < 2 || listLen != buffer.remaining()) {
throw new SSLProtocolException(
"Invalid application_layer_protocol_negotiation: " +
"incorrect list length (length=" + listLen + ")");
}
List protocolNames = new LinkedList<>();
while (buffer.hasRemaining()) {
// opaque ProtocolName<1..2^8-1>, RFC 7301.
byte[] bytes = Record.getBytes8(buffer);
if (bytes.length == 0) {
throw new SSLProtocolException(
"Invalid application_layer_protocol_negotiation " +
"extension: empty application protocol name");
}
String appProtocol = new String(bytes, alpnCharset);
protocolNames.add(appProtocol);
}
this.applicationProtocols =
Collections.unmodifiableList(protocolNames);
}
@Override
public String toString() {
return applicationProtocols.toString();
}
}
private static final class AlpnStringizer implements SSLStringizer {
@Override
public String toString(ByteBuffer buffer) {
try {
return (new AlpnSpec(buffer)).toString();
} catch (IOException ioe) {
// For debug logging only, so please swallow exceptions.
return ioe.getMessage();
}
}
}
/**
* Network data producer of the extension in a ClientHello
* handshake message.
*/
private static final class CHAlpnProducer implements HandshakeProducer {
static final int MAX_AP_LENGTH = 255;
static final int MAX_AP_LIST_LENGTH = 65535;
// Prevent instantiation of this class.
private CHAlpnProducer() {
// blank
}
@Override
public byte[] produce(ConnectionContext context,
HandshakeMessage message) throws IOException {
// The producing happens in client side only.
ClientHandshakeContext chc = (ClientHandshakeContext)context;
// Is it a supported and enabled extension?
if (!chc.sslConfig.isAvailable(SSLExtension.CH_ALPN)) {
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
SSLLogger.info(
"Ignore client unavailable extension: " +
SSLExtension.CH_ALPN.name);
}
chc.applicationProtocol = "";
chc.conContext.applicationProtocol = "";
return null;
}
String[] laps = chc.sslConfig.applicationProtocols;
if ((laps == null) || (laps.length == 0)) {
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
SSLLogger.info(
"No available application protocols");
}
return null;
}
// Produce the extension: first find the overall length
int listLength = 0; // ProtocolNameList length
for (String ap : laps) {
int length = ap.getBytes(alpnCharset).length;
if (length == 0) {
// log the configuration problem
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
SSLLogger.severe(
"Application protocol name cannot be empty");
}
throw chc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
"Application protocol name cannot be empty");
}
if (length <= MAX_AP_LENGTH) {
// opaque ProtocolName<1..2^8-1>, RFC 7301.
listLength += (length + 1);
} else {
// log the configuration problem
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
SSLLogger.severe(
"Application protocol name (" + ap +
") exceeds the size limit (" +
MAX_AP_LENGTH + " bytes)");
}
throw chc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
"Application protocol name (" + ap +
") exceeds the size limit (" +
MAX_AP_LENGTH + " bytes)");
}
if (listLength > MAX_AP_LIST_LENGTH) {
// log the configuration problem
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
SSLLogger.severe(
"The configured application protocols (" +
Arrays.toString(laps) +
") exceed the size limit (" +
MAX_AP_LIST_LENGTH + " bytes)");
}
throw chc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
"The configured application protocols (" +
Arrays.toString(laps) +
") exceed the size limit (" +
MAX_AP_LIST_LENGTH + " bytes)");
}
}
// ProtocolName protocol_name_list<2..2^16-1>, RFC 7301.
byte[] extData = new byte[listLength + 2];
ByteBuffer m = ByteBuffer.wrap(extData);
Record.putInt16(m, listLength);
// opaque ProtocolName<1..2^8-1>;
for (String ap : laps) {
Record.putBytes8(m, ap.getBytes(alpnCharset));
}
// Update the context.
chc.handshakeExtensions.put(SSLExtension.CH_ALPN,
new AlpnSpec(chc.sslConfig.applicationProtocols));
return extData;
}
}
/**
* Network data consumer of the extension in a ClientHello
* handshake message.
*/
private static final class CHAlpnConsumer implements ExtensionConsumer {
// Prevent instantiation of this class.
private CHAlpnConsumer() {
// blank
}
@Override
public void consume(ConnectionContext context,
HandshakeMessage message, ByteBuffer buffer) throws IOException {
// The consuming happens in server side only.
ServerHandshakeContext shc = (ServerHandshakeContext)context;
// Is it a supported and enabled extension?
if (!shc.sslConfig.isAvailable(SSLExtension.CH_ALPN)) {
shc.applicationProtocol = "";
shc.conContext.applicationProtocol = "";
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
SSLLogger.info(
"Ignore server unavailable extension: " +
SSLExtension.CH_ALPN.name);
}
return; // ignore the extension
}
// Is the extension enabled?
boolean noAPSelector;
if (shc.conContext.transport instanceof SSLEngine) {
noAPSelector = (shc.sslConfig.engineAPSelector == null);
} else {
noAPSelector = (shc.sslConfig.socketAPSelector == null);
}
boolean noAlpnProtocols =
shc.sslConfig.applicationProtocols == null ||
shc.sslConfig.applicationProtocols.length == 0;
if (noAPSelector && noAlpnProtocols) {
shc.applicationProtocol = "";
shc.conContext.applicationProtocol = "";
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
SSLLogger.fine(
"Ignore server unenabled extension: " +
SSLExtension.CH_ALPN.name);
}
return; // ignore the extension
}
// Parse the extension.
AlpnSpec spec;
try {
spec = new AlpnSpec(buffer);
} catch (IOException ioe) {
throw shc.conContext.fatal(Alert.UNEXPECTED_MESSAGE, ioe);
}
// Update the context.
if (noAPSelector) { // noAlpnProtocols is false
List protocolNames = spec.applicationProtocols;
boolean matched = false;
// Use server application protocol preference order.
for (String ap : shc.sslConfig.applicationProtocols) {
if (protocolNames.contains(ap)) {
shc.applicationProtocol = ap;
shc.conContext.applicationProtocol = ap;
matched = true;
break;
}
}
if (!matched) {
throw shc.conContext.fatal(Alert.NO_APPLICATION_PROTOCOL,
"No matching application layer protocol values");
}
} // Otherwise, applicationProtocol will be set by the
// application selector callback later.
shc.handshakeExtensions.put(SSLExtension.CH_ALPN, spec);
// No impact on session resumption.
//
// [RFC 7301] Unlike many other TLS extensions, this extension
// does not establish properties of the session, only of the
// connection. When session resumption or session tickets are
// used, the previous contents of this extension are irrelevant,
// and only the values in the new handshake messages are
// considered.
}
}
/**
* The absence processing if the extension is not present in
* a ClientHello handshake message.
*/
private static final class CHAlpnAbsence implements HandshakeAbsence {
@Override
public void absent(ConnectionContext context,
HandshakeMessage message) throws IOException {
// The producing happens in server side only.
ServerHandshakeContext shc = (ServerHandshakeContext)context;
// Please don't use the previous negotiated application protocol.
shc.applicationProtocol = "";
shc.conContext.applicationProtocol = "";
}
}
/**
* Network data producer of the extension in the ServerHello
* handshake message.
*/
private static final class SHAlpnProducer implements HandshakeProducer {
// Prevent instantiation of this class.
private SHAlpnProducer() {
// blank
}
@Override
public byte[] produce(ConnectionContext context,
HandshakeMessage message) throws IOException {
// The producing happens in client side only.
ServerHandshakeContext shc = (ServerHandshakeContext)context;
// In response to ALPN request only
AlpnSpec requestedAlps =
(AlpnSpec)shc.handshakeExtensions.get(SSLExtension.CH_ALPN);
if (requestedAlps == null) {
// Ignore, this extension was not requested and accepted.
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
SSLLogger.fine(
"Ignore unavailable extension: " +
SSLExtension.SH_ALPN.name);
}
shc.applicationProtocol = "";
shc.conContext.applicationProtocol = "";
return null;
}
List alps = requestedAlps.applicationProtocols;
if (shc.conContext.transport instanceof SSLEngine) {
if (shc.sslConfig.engineAPSelector != null) {
SSLEngine engine = (SSLEngine)shc.conContext.transport;
shc.applicationProtocol =
shc.sslConfig.engineAPSelector.apply(engine, alps);
if ((shc.applicationProtocol == null) ||
(!shc.applicationProtocol.isEmpty() &&
!alps.contains(shc.applicationProtocol))) {
throw shc.conContext.fatal(
Alert.NO_APPLICATION_PROTOCOL,
"No matching application layer protocol values");
}
}
} else {
if (shc.sslConfig.socketAPSelector != null) {
SSLSocket socket = (SSLSocket)shc.conContext.transport;
shc.applicationProtocol =
shc.sslConfig.socketAPSelector.apply(socket, alps);
if ((shc.applicationProtocol == null) ||
(!shc.applicationProtocol.isEmpty() &&
!alps.contains(shc.applicationProtocol))) {
throw shc.conContext.fatal(
Alert.NO_APPLICATION_PROTOCOL,
"No matching application layer protocol values");
}
}
}
if ((shc.applicationProtocol == null) ||
(shc.applicationProtocol.isEmpty())) {
// Ignore, no negotiated application layer protocol.
shc.applicationProtocol = "";
shc.conContext.applicationProtocol = "";
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
SSLLogger.warning(
"Ignore, no negotiated application layer protocol");
}
return null;
}
// opaque ProtocolName<1..2^8-1>, RFC 7301.
byte[] bytes = shc.applicationProtocol.getBytes(alpnCharset);
int listLen = bytes.length + 1; // 1: length byte
// ProtocolName protocol_name_list<2..2^16-1>, RFC 7301.
byte[] extData = new byte[listLen + 2]; // 2: list length
ByteBuffer m = ByteBuffer.wrap(extData);
Record.putInt16(m, listLen);
Record.putBytes8(m, bytes);
// Update the context.
shc.conContext.applicationProtocol = shc.applicationProtocol;
// Clean or register the extension
//
// No further use of the request and respond extension any more.
shc.handshakeExtensions.remove(SSLExtension.CH_ALPN);
return extData;
}
}
/**
* Network data consumer of the extension in the ServerHello
* handshake message.
*/
private static final class SHAlpnConsumer implements ExtensionConsumer {
// Prevent instantiation of this class.
private SHAlpnConsumer() {
// blank
}
@Override
public void consume(ConnectionContext context,
HandshakeMessage message, ByteBuffer buffer) throws IOException {
// The producing happens in client side only.
ClientHandshakeContext chc = (ClientHandshakeContext)context;
// In response to ALPN request only
AlpnSpec requestedAlps =
(AlpnSpec)chc.handshakeExtensions.get(SSLExtension.CH_ALPN);
if (requestedAlps == null ||
requestedAlps.applicationProtocols == null ||
requestedAlps.applicationProtocols.isEmpty()) {
throw chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,
"Unexpected " + SSLExtension.CH_ALPN.name + " extension");
}
// Parse the extension.
AlpnSpec spec;
try {
spec = new AlpnSpec(buffer);
} catch (IOException ioe) {
throw chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE, ioe);
}
// Only one application protocol is allowed.
if (spec.applicationProtocols.size() != 1) {
throw chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,
"Invalid " + SSLExtension.CH_ALPN.name + " extension: " +
"Only one application protocol name " +
"is allowed in ServerHello message");
}
// The respond application protocol must be one of the requested.
if (!requestedAlps.applicationProtocols.containsAll(
spec.applicationProtocols)) {
throw chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,
"Invalid " + SSLExtension.CH_ALPN.name + " extension: " +
"Only client specified application protocol " +
"is allowed in ServerHello message");
}
// Update the context.
chc.applicationProtocol = spec.applicationProtocols.get(0);
chc.conContext.applicationProtocol = chc.applicationProtocol;
// Clean or register the extension
//
// No further use of the request and respond extension any more.
chc.handshakeExtensions.remove(SSLExtension.CH_ALPN);
}
}
/**
* The absence processing if the extension is not present in
* the ServerHello handshake message.
*/
private static final class SHAlpnAbsence implements HandshakeAbsence {
@Override
public void absent(ConnectionContext context,
HandshakeMessage message) throws IOException {
// The producing happens in client side only.
ClientHandshakeContext chc = (ClientHandshakeContext)context;
// Please don't use the previous negotiated application protocol.
chc.applicationProtocol = "";
chc.conContext.applicationProtocol = "";
}
}
}
