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/*
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* Copyright (c) 2015, 2018, 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.math.BigInteger;
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import java.nio.ByteBuffer;
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import java.security.CryptoPrimitive;
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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.KeyFactory;
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import java.security.NoSuchAlgorithmException;
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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.EnumSet;
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import java.util.Locale;
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import javax.crypto.interfaces.DHPublicKey;
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import javax.crypto.spec.DHParameterSpec;
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import javax.crypto.spec.DHPublicKeySpec;
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import sun.security.ssl.DHKeyExchange.DHECredentials;
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import sun.security.ssl.DHKeyExchange.DHEPossession;
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import sun.security.ssl.SSLHandshake.HandshakeMessage;
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import sun.security.ssl.SupportedGroupsExtension.NamedGroup;
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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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import sun.security.util.KeyUtil;
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/**
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* Pack of the ServerKeyExchange handshake message.
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*/
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final class DHServerKeyExchange {
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static final SSLConsumer dhHandshakeConsumer =
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new DHServerKeyExchangeConsumer();
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static final HandshakeProducer dhHandshakeProducer =
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new DHServerKeyExchangeProducer();
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/**
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* The DiffieHellman ServerKeyExchange handshake message.
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*/
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private static final
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class DHServerKeyExchangeMessage extends HandshakeMessage {
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// public key encapsulated in this message
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private byte[] p; // 1 to 2^16 - 1 bytes
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private byte[] g; // 1 to 2^16 - 1 bytes
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private byte[] y; // 1 to 2^16 - 1 bytes
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// the signature algorithm used by this ServerKeyExchange message
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private final boolean useExplicitSigAlgorithm;
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private final SignatureScheme signatureScheme;
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// signature bytes, or null if anonymous
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private final byte[] paramsSignature;
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DHServerKeyExchangeMessage(
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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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DHEPossession dhePossession = null;
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X509Possession x509Possession = null;
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for (SSLPossession possession : shc.handshakePossessions) {
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if (possession instanceof DHEPossession) {
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dhePossession = (DHEPossession)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 (dhePossession != null) {
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break;
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}
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}
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}
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if (dhePossession == null) {
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// unlikely
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shc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
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"No DHE credentials negotiated for server key exchange");
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}
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DHPublicKey publicKey = dhePossession.publicKey;
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DHParameterSpec params = publicKey.getParams();
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this.p = Utilities.toByteArray(params.getP());
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this.g = Utilities.toByteArray(params.getG());
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this.y = Utilities.toByteArray(publicKey.getY());
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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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signatureScheme = SignatureScheme.getPreferableAlgorithm(
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shc.peerRequestedSignatureSchemes,
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x509Possession.popPrivateKey,
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shc.negotiatedProtocol);
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if (signatureScheme == 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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shc.conContext.fatal(Alert.INTERNAL_ERROR,
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"No preferred signature algorithm");
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}
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try {
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signer = signatureScheme.getSignature();
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} catch (NoSuchAlgorithmException |
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InvalidAlgorithmParameterException nsae) {
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shc.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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signatureScheme = null;
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try {
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signer = getSignature(
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x509Possession.popPrivateKey.getAlgorithm());
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} catch (NoSuchAlgorithmException e) {
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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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signer.initSign(x509Possession.popPrivateKey);
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updateSignature(signer, shc.clientHelloRandom.randomBytes,
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shc.serverHelloRandom.randomBytes);
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signature = signer.sign();
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} catch (InvalidKeyException | SignatureException ex) {
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shc.conContext.fatal(Alert.INTERNAL_ERROR,
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"Failed to sign dhe 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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DHServerKeyExchangeMessage(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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this.p = Record.getBytes16(m);
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this.g = Record.getBytes16(m);
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this.y = Record.getBytes16(m);
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try {
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KeyUtil.validate(new DHPublicKeySpec(
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new BigInteger(1, y),
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new BigInteger(1, p),
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new BigInteger(1, p)));
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} catch (InvalidKeyException ike) {
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chc.conContext.fatal(Alert.HANDSHAKE_FAILURE,
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"Invalid DH ServerKeyExchange: invalid parameters", ike);
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}
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// TODO: check FFDHE named group
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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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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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chc.conContext.fatal(Alert.HANDSHAKE_FAILURE,
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"Invalid signature algorithm (" + ssid +
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") used in DH ServerKeyExchange handshake message");
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}
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if (!chc.localSupportedSignAlgs.contains(signatureScheme)) {
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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 DH ServerKeyExchange handshake message");
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}
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} else {
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this.signatureScheme = null;
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}
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// read and verify the signature
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this.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.getSignature();
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} catch (NoSuchAlgorithmException |
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InvalidAlgorithmParameterException nsae) {
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chc.conContext.fatal(Alert.INTERNAL_ERROR,
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"Unsupported signature algorithm: " +
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signatureScheme.name, nsae);
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return; // make the compiler happe
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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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} catch (NoSuchAlgorithmException e) {
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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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return; // make the compiler happe
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}
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}
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try {
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signer.initVerify(x509Credentials.popPublicKey);
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updateSignature(signer,
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chc.clientHelloRandom.randomBytes,
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chc.serverHelloRandom.randomBytes);
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if (!signer.verify(paramsSignature)) {
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chc.conContext.fatal(Alert.HANDSHAKE_FAILURE,
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"Invalid signature on DH ServerKeyExchange message");
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}
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} catch (InvalidKeyException | SignatureException ex) {
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chc.conContext.fatal(Alert.HANDSHAKE_FAILURE,
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"Cannot verify DH 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 6 + p.length + g.length + y.length + sigLen;
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// 6: overhead for p, g, y values
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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.putBytes16(p);
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hos.putBytes16(g);
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hos.putBytes16(y);
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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 (paramsSignature == null) { // anonymous
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MessageFormat messageFormat = new MessageFormat(
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"\"DH ServerKeyExchange\": '{'\n" +
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" \"parameters\": '{'\n" +
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" \"dh_p\": '{'\n" +
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"{0}\n" +
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" '}',\n" +
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" \"dh_g\": '{'\n" +
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"{1}\n" +
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" '}',\n" +
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" \"dh_Ys\": '{'\n" +
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"{2}\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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Utilities.indent(
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hexEncoder.encodeBuffer(p), " "),
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Utilities.indent(
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hexEncoder.encodeBuffer(g), " "),
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Utilities.indent(
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hexEncoder.encodeBuffer(y), " "),
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};
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return messageFormat.format(messageFields);
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}
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if (useExplicitSigAlgorithm) {
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MessageFormat messageFormat = new MessageFormat(
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"\"DH ServerKeyExchange\": '{'\n" +
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" \"parameters\": '{'\n" +
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" \"dh_p\": '{'\n" +
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"{0}\n" +
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" '}',\n" +
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" \"dh_g\": '{'\n" +
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"{1}\n" +
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" '}',\n" +
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" \"dh_Ys\": '{'\n" +
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"{2}\n" +
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" '}',\n" +
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" '}',\n" +
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" \"digital signature\": '{'\n" +
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" \"signature algorithm\": \"{3}\"\n" +
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" \"signature\": '{'\n" +
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"{4}\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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Utilities.indent(
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hexEncoder.encodeBuffer(p), " "),
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Utilities.indent(
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hexEncoder.encodeBuffer(g), " "),
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Utilities.indent(
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hexEncoder.encodeBuffer(y), " "),
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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 {
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MessageFormat messageFormat = new MessageFormat(
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"\"DH ServerKeyExchange\": '{'\n" +
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" \"parameters\": '{'\n" +
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" \"dh_p\": '{'\n" +
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"{0}\n" +
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" '}',\n" +
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" \"dh_g\": '{'\n" +
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"{1}\n" +
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" '}',\n" +
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" \"dh_Ys\": '{'\n" +
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"{2}\n" +
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" '}',\n" +
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" '}',\n" +
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" \"signature\": '{'\n" +
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"{3}\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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Utilities.indent(
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hexEncoder.encodeBuffer(p), " "),
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Utilities.indent(
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hexEncoder.encodeBuffer(g), " "),
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Utilities.indent(
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hexEncoder.encodeBuffer(y), " "),
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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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}
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}
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417 |
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private static Signature getSignature(String keyAlgorithm)
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throws NoSuchAlgorithmException {
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switch (keyAlgorithm) {
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case "DSA":
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return JsseJce.getSignature(JsseJce.SIGNATURE_DSA);
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case "RSA":
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|
424 |
return RSASignature.getInstance();
|
|
425 |
default:
|
|
426 |
throw new NoSuchAlgorithmException(
|
|
427 |
"neither an RSA or a DSA key : " + keyAlgorithm);
|
|
428 |
}
|
|
429 |
}
|
|
430 |
|
|
431 |
/*
|
|
432 |
* Update sig with nonces and Diffie-Hellman public key.
|
|
433 |
*/
|
|
434 |
private void updateSignature(Signature sig, byte[] clntNonce,
|
|
435 |
byte[] svrNonce) throws SignatureException {
|
|
436 |
int tmp;
|
|
437 |
|
|
438 |
sig.update(clntNonce);
|
|
439 |
sig.update(svrNonce);
|
|
440 |
|
|
441 |
sig.update((byte)(p.length >> 8));
|
|
442 |
sig.update((byte)(p.length & 0x0ff));
|
|
443 |
sig.update(p);
|
|
444 |
|
|
445 |
sig.update((byte)(g.length >> 8));
|
|
446 |
sig.update((byte)(g.length & 0x0ff));
|
|
447 |
sig.update(g);
|
|
448 |
|
|
449 |
sig.update((byte)(y.length >> 8));
|
|
450 |
sig.update((byte)(y.length & 0x0ff));
|
|
451 |
sig.update(y);
|
|
452 |
}
|
|
453 |
}
|
|
454 |
|
|
455 |
/**
|
|
456 |
* The DiffieHellman "ServerKeyExchange" handshake message producer.
|
|
457 |
*/
|
|
458 |
static final class DHServerKeyExchangeProducer
|
|
459 |
implements HandshakeProducer {
|
|
460 |
// Prevent instantiation of this class.
|
|
461 |
private DHServerKeyExchangeProducer() {
|
|
462 |
// blank
|
|
463 |
}
|
|
464 |
|
|
465 |
@Override
|
|
466 |
public byte[] produce(ConnectionContext context,
|
|
467 |
HandshakeMessage message) throws IOException {
|
|
468 |
// The producing happens in server side only.
|
|
469 |
ServerHandshakeContext shc = (ServerHandshakeContext)context;
|
|
470 |
DHServerKeyExchangeMessage skem =
|
|
471 |
new DHServerKeyExchangeMessage(shc);
|
|
472 |
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
|
|
473 |
SSLLogger.fine(
|
|
474 |
"Produced DH ServerKeyExchange handshake message", skem);
|
|
475 |
}
|
|
476 |
|
|
477 |
// Output the handshake message.
|
|
478 |
skem.write(shc.handshakeOutput);
|
|
479 |
shc.handshakeOutput.flush();
|
|
480 |
|
|
481 |
// The handshake message has been delivered.
|
|
482 |
return null;
|
|
483 |
}
|
|
484 |
}
|
|
485 |
|
|
486 |
/**
|
|
487 |
* The DiffieHellman "ServerKeyExchange" handshake message consumer.
|
|
488 |
*/
|
|
489 |
static final class DHServerKeyExchangeConsumer implements SSLConsumer {
|
|
490 |
// Prevent instantiation of this class.
|
|
491 |
private DHServerKeyExchangeConsumer() {
|
|
492 |
// blank
|
|
493 |
}
|
|
494 |
|
|
495 |
@Override
|
|
496 |
public void consume(ConnectionContext context,
|
|
497 |
ByteBuffer message) throws IOException {
|
|
498 |
// The consuming happens in client side only.
|
|
499 |
ClientHandshakeContext chc = (ClientHandshakeContext)context;
|
|
500 |
|
|
501 |
DHServerKeyExchangeMessage skem =
|
|
502 |
new DHServerKeyExchangeMessage(chc, message);
|
|
503 |
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
|
|
504 |
SSLLogger.fine(
|
|
505 |
"Consuming DH ServerKeyExchange handshake message", skem);
|
|
506 |
}
|
|
507 |
|
|
508 |
//
|
|
509 |
// validate
|
|
510 |
//
|
|
511 |
// check constraints of EC PublicKey
|
|
512 |
DHPublicKey publicKey;
|
|
513 |
try {
|
|
514 |
KeyFactory kf = JsseJce.getKeyFactory("DiffieHellman");
|
|
515 |
DHPublicKeySpec spec = new DHPublicKeySpec(
|
|
516 |
new BigInteger(1, skem.y),
|
|
517 |
new BigInteger(1, skem.p),
|
|
518 |
new BigInteger(1, skem.g));
|
|
519 |
publicKey = (DHPublicKey)kf.generatePublic(spec);
|
|
520 |
} catch (GeneralSecurityException gse) {
|
|
521 |
chc.conContext.fatal(Alert.INSUFFICIENT_SECURITY,
|
|
522 |
"Could not generate DHPublicKey", gse);
|
|
523 |
|
|
524 |
return; // make the compiler happy
|
|
525 |
}
|
|
526 |
|
|
527 |
if (!chc.algorithmConstraints.permits(
|
|
528 |
EnumSet.of(CryptoPrimitive.KEY_AGREEMENT), publicKey)) {
|
|
529 |
chc.conContext.fatal(Alert.INSUFFICIENT_SECURITY,
|
|
530 |
"DH ServerKeyExchange does not comply to " +
|
|
531 |
"algorithm constraints");
|
|
532 |
}
|
|
533 |
|
|
534 |
//
|
|
535 |
// update
|
|
536 |
//
|
|
537 |
NamedGroup namedGroup = NamedGroup.valueOf(publicKey.getParams());
|
|
538 |
chc.handshakeCredentials.add(
|
|
539 |
new DHECredentials(publicKey, namedGroup));
|
|
540 |
|
|
541 |
//
|
|
542 |
// produce
|
|
543 |
//
|
|
544 |
// Need no new handshake message producers here.
|
|
545 |
}
|
|
546 |
}
|
|
547 |
}
|
|
548 |
|