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111 lines
3.4 KiB
Java
111 lines
3.4 KiB
Java
/*
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* Copyright (c) 1997, 2012, 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.io.PrintStream;
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import java.math.BigInteger;
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import javax.net.ssl.SSLHandshakeException;
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/*
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* Message used by clients to send their Diffie-Hellman public
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* keys to servers.
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*
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* @author David Brownell
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*/
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final class DHClientKeyExchange extends HandshakeMessage {
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@Override
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int messageType() {
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return ht_client_key_exchange;
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}
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/*
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* This value may be empty if it was included in the
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* client's certificate ...
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*/
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private byte[] dh_Yc; // 1 to 2^16 -1 bytes
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BigInteger getClientPublicKey() {
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return dh_Yc == null ? null : new BigInteger(1, dh_Yc);
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}
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/*
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* Either pass the client's public key explicitly (because it's
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* using DHE or DH_anon), or implicitly (the public key was in the
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* certificate).
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*/
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DHClientKeyExchange(BigInteger publicKey) {
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dh_Yc = toByteArray(publicKey);
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}
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DHClientKeyExchange() {
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dh_Yc = null;
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}
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/*
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* Get the client's public key either explicitly or implicitly.
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* (It's ugly to have an empty record be sent in the latter case,
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* but that's what the protocol spec requires.)
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*/
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DHClientKeyExchange(HandshakeInStream input) throws IOException {
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if (input.available() >= 2) {
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dh_Yc = input.getBytes16();
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} else {
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// currently, we don't support cipher suites that requires
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// implicit public key of client.
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throw new SSLHandshakeException(
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"Unsupported implicit client DiffieHellman public key");
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}
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}
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@Override
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int messageLength() {
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if (dh_Yc == null) {
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return 0;
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} else {
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return dh_Yc.length + 2;
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}
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}
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@Override
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void send(HandshakeOutStream s) throws IOException {
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if (dh_Yc != null && dh_Yc.length != 0) {
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s.putBytes16(dh_Yc);
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}
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}
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@Override
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void print(PrintStream s) throws IOException {
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s.println("*** ClientKeyExchange, DH");
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if (debug != null && Debug.isOn("verbose")) {
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Debug.println(s, "DH Public key", dh_Yc);
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}
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}
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}
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