/*

 * Copyright (c) 2006, 2012, 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

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 */

package sun.security.ssl;

import java.io.IOException;

import java.io.PrintStream;

import java.security.PublicKey;

import java.security.interfaces.ECPublicKey;

import java.security.spec.*;

/**

 * ClientKeyExchange message for all ECDH based key exchange methods. It

 * contains the client's ephemeral public value.

 *

 * @since   1.6

 * @author  Andreas Sterbenz

 */

final class ECDHClientKeyExchange extends HandshakeMessage {

    @Override

    int messageType() {

        return ht_client_key_exchange;

    }

    private byte[] encodedPoint;

    byte[] getEncodedPoint() {

        return encodedPoint;

    }

    // Called by the client with its ephemeral public key.

    ECDHClientKeyExchange(PublicKey publicKey) {

        ECPublicKey ecKey = (ECPublicKey)publicKey;

        ECPoint point = ecKey.getW();

        ECParameterSpec params = ecKey.getParams();

        encodedPoint = JsseJce.encodePoint(point, params.getCurve());

    }

    ECDHClientKeyExchange(HandshakeInStream input) throws IOException {

        encodedPoint = input.getBytes8();

    }

    @Override

    int messageLength() {

        return encodedPoint.length + 1;

    }

    @Override

    void send(HandshakeOutStream s) throws IOException {

        s.putBytes8(encodedPoint);

    }

    @Override

    void print(PrintStream s) throws IOException {

        s.println("*** ECDHClientKeyExchange");

        if (debug != null && Debug.isOn("verbose")) {

            Debug.println(s, "ECDH Public value", encodedPoint);

        }

    }

}