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530 lines
21 KiB
Java
530 lines
21 KiB
Java
/*
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* Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.security.ssl;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.security.GeneralSecurityException;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.InvalidKeyException;
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import java.security.Key;
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import java.security.NoSuchAlgorithmException;
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import java.security.PrivateKey;
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import java.security.PublicKey;
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import java.security.Signature;
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import java.security.SignatureException;
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import java.text.MessageFormat;
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import java.util.Locale;
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import java.util.Map;
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import sun.security.ssl.SSLHandshake.HandshakeMessage;
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import sun.security.ssl.SupportedGroupsExtension.SupportedGroups;
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import sun.security.ssl.X509Authentication.X509Credentials;
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import sun.security.ssl.X509Authentication.X509Possession;
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import sun.security.util.HexDumpEncoder;
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/**
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* Pack of the ServerKeyExchange handshake message.
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*/
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final class ECDHServerKeyExchange {
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static final SSLConsumer ecdheHandshakeConsumer =
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new ECDHServerKeyExchangeConsumer();
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static final HandshakeProducer ecdheHandshakeProducer =
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new ECDHServerKeyExchangeProducer();
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/**
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* The ECDH ServerKeyExchange handshake message.
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*/
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private static final
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class ECDHServerKeyExchangeMessage extends HandshakeMessage {
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private static final byte CURVE_NAMED_CURVE = (byte)0x03;
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// id of the named curve
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private final NamedGroup namedGroup;
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// encoded public point
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private final byte[] publicPoint;
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// signature bytes, or null if anonymous
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private final byte[] paramsSignature;
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private final boolean useExplicitSigAlgorithm;
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// the signature algorithm used by this ServerKeyExchange message
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private final SignatureScheme signatureScheme;
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// the parsed credential object
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private SSLCredentials sslCredentials;
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ECDHServerKeyExchangeMessage(
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HandshakeContext handshakeContext) throws IOException {
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super(handshakeContext);
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// This happens in server side only.
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ServerHandshakeContext shc =
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(ServerHandshakeContext)handshakeContext;
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// Find the Possessions needed
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NamedGroupPossession namedGroupPossession = null;
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X509Possession x509Possession = null;
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for (SSLPossession possession : shc.handshakePossessions) {
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if (possession instanceof NamedGroupPossession) {
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namedGroupPossession = (NamedGroupPossession)possession;
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if (x509Possession != null) {
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break;
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}
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} else if (possession instanceof X509Possession) {
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x509Possession = (X509Possession)possession;
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if (namedGroupPossession != null) {
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break;
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}
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}
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}
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if (namedGroupPossession == null) {
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// unlikely
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throw shc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
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"No ECDHE credentials negotiated for server key exchange");
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}
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// Find the NamedGroup used for the ephemeral keys.
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namedGroup = namedGroupPossession.getNamedGroup();
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if ((namedGroup == null) || (!namedGroup.isAvailable)) {
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// unlikely
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throw shc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
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"Missing or improper named group: " + namedGroup);
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}
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publicPoint = namedGroup.encodePossessionPublicKey(
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namedGroupPossession);
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if (publicPoint == null) {
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// unlikely
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throw shc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
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"Missing public point for named group: " + namedGroup);
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}
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if (x509Possession == null) {
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// anonymous, no authentication, no signature
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paramsSignature = null;
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signatureScheme = null;
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useExplicitSigAlgorithm = false;
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} else {
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useExplicitSigAlgorithm =
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shc.negotiatedProtocol.useTLS12PlusSpec();
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Signature signer = null;
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if (useExplicitSigAlgorithm) {
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Map.Entry<SignatureScheme, Signature> schemeAndSigner =
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SignatureScheme.getSignerOfPreferableAlgorithm(
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shc.algorithmConstraints,
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shc.peerRequestedSignatureSchemes,
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x509Possession,
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shc.negotiatedProtocol);
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if (schemeAndSigner == null) {
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// Unlikely, the credentials generator should have
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// selected the preferable signature algorithm properly.
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throw shc.conContext.fatal(Alert.INTERNAL_ERROR,
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"No supported signature algorithm for " +
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x509Possession.popPrivateKey.getAlgorithm() +
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" key");
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} else {
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signatureScheme = schemeAndSigner.getKey();
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signer = schemeAndSigner.getValue();
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}
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} else {
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signatureScheme = null;
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try {
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signer = getSignature(
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x509Possession.popPrivateKey.getAlgorithm(),
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x509Possession.popPrivateKey);
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} catch (NoSuchAlgorithmException | InvalidKeyException e) {
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throw shc.conContext.fatal(Alert.INTERNAL_ERROR,
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"Unsupported signature algorithm: " +
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x509Possession.popPrivateKey.getAlgorithm(), e);
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}
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}
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byte[] signature = null;
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try {
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updateSignature(signer, shc.clientHelloRandom.randomBytes,
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shc.serverHelloRandom.randomBytes,
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namedGroup.id, publicPoint);
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signature = signer.sign();
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} catch (SignatureException ex) {
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throw shc.conContext.fatal(Alert.INTERNAL_ERROR,
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"Failed to sign ecdhe parameters: " +
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x509Possession.popPrivateKey.getAlgorithm(), ex);
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}
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paramsSignature = signature;
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}
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}
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ECDHServerKeyExchangeMessage(HandshakeContext handshakeContext,
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ByteBuffer m) throws IOException {
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super(handshakeContext);
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// This happens in client side only.
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ClientHandshakeContext chc =
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(ClientHandshakeContext)handshakeContext;
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byte curveType = (byte)Record.getInt8(m);
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if (curveType != CURVE_NAMED_CURVE) {
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// Unlikely as only the named curves should be negotiated.
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throw chc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
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"Unsupported ECCurveType: " + curveType);
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}
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int namedGroupId = Record.getInt16(m);
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this.namedGroup = NamedGroup.valueOf(namedGroupId);
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if (namedGroup == null) {
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throw chc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
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"Unknown named group ID: " + namedGroupId);
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}
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if (!SupportedGroups.isSupported(namedGroup)) {
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throw chc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
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"Unsupported named group: " + namedGroup);
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}
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publicPoint = Record.getBytes8(m);
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if (publicPoint.length == 0) {
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throw chc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
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"Insufficient Point data: " + namedGroup);
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}
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try {
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sslCredentials = namedGroup.decodeCredentials(
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publicPoint, handshakeContext.algorithmConstraints,
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s -> chc.conContext.fatal(Alert.INSUFFICIENT_SECURITY,
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"ServerKeyExchange " + namedGroup + ": " + (s)));
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} catch (GeneralSecurityException ex) {
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throw chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,
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"Cannot decode named group: " +
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NamedGroup.nameOf(namedGroupId));
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}
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X509Credentials x509Credentials = null;
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for (SSLCredentials cd : chc.handshakeCredentials) {
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if (cd instanceof X509Credentials) {
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x509Credentials = (X509Credentials)cd;
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break;
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}
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}
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if (x509Credentials == null) {
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// anonymous, no authentication, no signature
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if (m.hasRemaining()) {
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throw chc.conContext.fatal(Alert.HANDSHAKE_FAILURE,
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"Invalid DH ServerKeyExchange: unknown extra data");
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}
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this.signatureScheme = null;
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this.paramsSignature = null;
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this.useExplicitSigAlgorithm = false;
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return;
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}
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this.useExplicitSigAlgorithm =
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chc.negotiatedProtocol.useTLS12PlusSpec();
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if (useExplicitSigAlgorithm) {
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int ssid = Record.getInt16(m);
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signatureScheme = SignatureScheme.valueOf(ssid);
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if (signatureScheme == null) {
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throw chc.conContext.fatal(Alert.HANDSHAKE_FAILURE,
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"Invalid signature algorithm (" + ssid +
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") used in ECDH ServerKeyExchange handshake message");
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}
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if (!chc.localSupportedSignAlgs.contains(signatureScheme)) {
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throw chc.conContext.fatal(Alert.HANDSHAKE_FAILURE,
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"Unsupported signature algorithm (" +
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signatureScheme.name +
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") used in ECDH ServerKeyExchange handshake message");
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}
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} else {
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signatureScheme = null;
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}
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// read and verify the signature
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paramsSignature = Record.getBytes16(m);
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Signature signer;
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if (useExplicitSigAlgorithm) {
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try {
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signer = signatureScheme.getVerifier(
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x509Credentials.popPublicKey);
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} catch (NoSuchAlgorithmException | InvalidKeyException |
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InvalidAlgorithmParameterException nsae) {
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throw chc.conContext.fatal(Alert.INTERNAL_ERROR,
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"Unsupported signature algorithm: " +
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signatureScheme.name, nsae);
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}
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} else {
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try {
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signer = getSignature(
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x509Credentials.popPublicKey.getAlgorithm(),
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x509Credentials.popPublicKey);
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} catch (NoSuchAlgorithmException | InvalidKeyException e) {
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throw chc.conContext.fatal(Alert.INTERNAL_ERROR,
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"Unsupported signature algorithm: " +
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x509Credentials.popPublicKey.getAlgorithm(), e);
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}
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}
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try {
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updateSignature(signer,
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chc.clientHelloRandom.randomBytes,
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chc.serverHelloRandom.randomBytes,
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namedGroup.id, publicPoint);
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if (!signer.verify(paramsSignature)) {
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throw chc.conContext.fatal(Alert.HANDSHAKE_FAILURE,
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"Invalid ECDH ServerKeyExchange signature");
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}
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} catch (SignatureException ex) {
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throw chc.conContext.fatal(Alert.HANDSHAKE_FAILURE,
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"Cannot verify ECDH ServerKeyExchange signature", ex);
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}
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}
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@Override
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public SSLHandshake handshakeType() {
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return SSLHandshake.SERVER_KEY_EXCHANGE;
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}
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@Override
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public int messageLength() {
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int sigLen = 0;
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if (paramsSignature != null) {
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sigLen = 2 + paramsSignature.length;
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if (useExplicitSigAlgorithm) {
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sigLen += SignatureScheme.sizeInRecord();
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}
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}
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return 4 + publicPoint.length + sigLen;
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}
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@Override
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public void send(HandshakeOutStream hos) throws IOException {
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hos.putInt8(CURVE_NAMED_CURVE);
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hos.putInt16(namedGroup.id);
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hos.putBytes8(publicPoint);
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if (paramsSignature != null) {
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if (useExplicitSigAlgorithm) {
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hos.putInt16(signatureScheme.id);
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}
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hos.putBytes16(paramsSignature);
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}
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}
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@Override
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public String toString() {
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if (useExplicitSigAlgorithm) {
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MessageFormat messageFormat = new MessageFormat(
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"\"ECDH ServerKeyExchange\": '{'\n" +
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" \"parameters\": '{'\n" +
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" \"named group\": \"{0}\"\n" +
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" \"ecdh public\": '{'\n" +
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"{1}\n" +
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" '}',\n" +
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" '}',\n" +
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" \"digital signature\": '{'\n" +
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" \"signature algorithm\": \"{2}\"\n" +
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" \"signature\": '{'\n" +
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"{3}\n" +
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" '}',\n" +
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" '}'\n" +
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"'}'",
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Locale.ENGLISH);
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HexDumpEncoder hexEncoder = new HexDumpEncoder();
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Object[] messageFields = {
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namedGroup.name,
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Utilities.indent(
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hexEncoder.encodeBuffer(publicPoint), " "),
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signatureScheme.name,
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Utilities.indent(
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hexEncoder.encodeBuffer(paramsSignature), " ")
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};
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return messageFormat.format(messageFields);
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} else if (paramsSignature != null) {
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MessageFormat messageFormat = new MessageFormat(
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"\"ECDH ServerKeyExchange\": '{'\n" +
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" \"parameters\": '{'\n" +
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" \"named group\": \"{0}\"\n" +
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" \"ecdh public\": '{'\n" +
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"{1}\n" +
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" '}',\n" +
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" '}',\n" +
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" \"signature\": '{'\n" +
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"{2}\n" +
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" '}'\n" +
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"'}'",
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Locale.ENGLISH);
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HexDumpEncoder hexEncoder = new HexDumpEncoder();
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Object[] messageFields = {
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namedGroup.name,
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Utilities.indent(
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hexEncoder.encodeBuffer(publicPoint), " "),
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Utilities.indent(
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hexEncoder.encodeBuffer(paramsSignature), " ")
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};
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return messageFormat.format(messageFields);
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} else { // anonymous
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MessageFormat messageFormat = new MessageFormat(
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"\"ECDH ServerKeyExchange\": '{'\n" +
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" \"parameters\": '{'\n" +
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" \"named group\": \"{0}\"\n" +
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" \"ecdh public\": '{'\n" +
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"{1}\n" +
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" '}',\n" +
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" '}'\n" +
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"'}'",
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Locale.ENGLISH);
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HexDumpEncoder hexEncoder = new HexDumpEncoder();
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Object[] messageFields = {
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namedGroup.name,
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Utilities.indent(
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hexEncoder.encodeBuffer(publicPoint), " "),
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};
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return messageFormat.format(messageFields);
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}
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}
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private static Signature getSignature(String keyAlgorithm,
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Key key) throws NoSuchAlgorithmException, InvalidKeyException {
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Signature signer = null;
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switch (keyAlgorithm) {
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case "EC":
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signer = Signature.getInstance(JsseJce.SIGNATURE_ECDSA);
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break;
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case "EdDSA":
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signer = Signature.getInstance(JsseJce.SIGNATURE_EDDSA);
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break;
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case "RSA":
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signer = RSASignature.getInstance();
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break;
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default:
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throw new NoSuchAlgorithmException(
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"neither an RSA or a EC key : " + keyAlgorithm);
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}
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if (signer != null) {
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if (key instanceof PublicKey) {
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signer.initVerify((PublicKey)(key));
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} else {
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signer.initSign((PrivateKey)key);
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}
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}
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return signer;
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}
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private static void updateSignature(Signature sig,
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byte[] clntNonce, byte[] svrNonce, int namedGroupId,
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byte[] publicPoint) throws SignatureException {
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sig.update(clntNonce);
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sig.update(svrNonce);
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sig.update(CURVE_NAMED_CURVE);
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sig.update((byte)((namedGroupId >> 8) & 0xFF));
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sig.update((byte)(namedGroupId & 0xFF));
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sig.update((byte)publicPoint.length);
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sig.update(publicPoint);
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}
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}
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/**
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* The ECDH "ServerKeyExchange" handshake message producer.
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*/
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private static final
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class ECDHServerKeyExchangeProducer implements HandshakeProducer {
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// Prevent instantiation of this class.
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private ECDHServerKeyExchangeProducer() {
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// blank
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}
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@Override
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public byte[] produce(ConnectionContext context,
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HandshakeMessage message) throws IOException {
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// The producing happens in server side only.
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ServerHandshakeContext shc = (ServerHandshakeContext)context;
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ECDHServerKeyExchangeMessage skem =
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new ECDHServerKeyExchangeMessage(shc);
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
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SSLLogger.fine(
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"Produced ECDH ServerKeyExchange handshake message", skem);
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}
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// Output the handshake message.
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skem.write(shc.handshakeOutput);
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shc.handshakeOutput.flush();
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// The handshake message has been delivered.
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return null;
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}
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}
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/**
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* The ECDH "ServerKeyExchange" handshake message consumer.
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*/
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private static final
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class ECDHServerKeyExchangeConsumer implements SSLConsumer {
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// Prevent instantiation of this class.
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private ECDHServerKeyExchangeConsumer() {
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// blank
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}
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@Override
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public void consume(ConnectionContext context,
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ByteBuffer message) throws IOException {
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// The consuming happens in client side only.
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ClientHandshakeContext chc = (ClientHandshakeContext)context;
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// AlgorithmConstraints are checked during decoding
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ECDHServerKeyExchangeMessage skem =
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new ECDHServerKeyExchangeMessage(chc, message);
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
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SSLLogger.fine(
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"Consuming ECDH ServerKeyExchange handshake message", skem);
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}
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//
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// update
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//
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chc.handshakeCredentials.add(skem.sslCredentials);
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//
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// produce
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//
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// Need no new handshake message producers here.
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}
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}
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}
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