/*
 *  Java OTR library
 *  Copyright (C) 2008-2009  Ian Goldberg, Muhaimeen Ashraf, Andrew Chung,
 *                           Can Tang
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of version 2.1 of the GNU Lesser General
 *  Public License as published by the Free Software Foundation.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package ca.uwaterloo.crysp.otr.crypt.rim;

import net.rim.device.api.crypto.DHPrivateKey;
import net.rim.device.api.crypto.InvalidKeyException;
import ca.uwaterloo.crysp.otr.OTRException;
import net.rim.device.api.crypto.CryptoTokenException;

/**
 * Private key for the Diffie Hellman key exchange.
 * 
 */
public class RIMDHPrivateKey extends RIMDHKey implements
        ca.uwaterloo.crysp.otr.crypt.DHPrivateKey {
    private DHPrivateKey priv;

    public RIMDHPrivateKey(byte[] val) throws OTRException {
        super(RIMDHKeyPairGenerator.DH_G, RIMDHKeyPairGenerator.DH_P);
        try {
            priv = new DHPrivateKey(super.getDHCS(), val);
        } catch (Exception e) {
            throw new OTRException(e.toString());
        }
    }

    public RIMDHPrivateKey(DHPrivateKey val) {
        super(RIMDHKeyPairGenerator.DH_G, RIMDHKeyPairGenerator.DH_P);
        priv = val;
    }

    public byte[] getX() {
        try {
            return RIMMPI.toBytes(priv.getPrivateKeyData());
        } catch (Exception e) {
        }
        return null;
    }

    public DHPrivateKey getDHPrivateKey() {
        return priv;
    }

    public String toString() {
        return priv.toString();
    }
}
