package com.trilead.ssh2.packets;

import java.io.IOException;

import java.math.BigInteger;

/**
 * PacketKexDhGexGroup.
 *
 * @author Christian Plattner, plattner@trilead.com
 * @version $Id: PacketKexDhGexGroup.java,v 1.1 2007/10/15 12:49:55 cplattne Exp $
 */
public class PacketKexDhGexGroup {
    byte[] payload;

    BigInteger p;
    BigInteger g;

    public PacketKexDhGexGroup(byte payload[], int off, int len) throws IOException {
        this.payload = new byte[len];
        System.arraycopy(payload, off, this.payload, 0, len);
        TypesReader tr = new TypesReader(payload, off, len);
        int packet_type = tr.readByte();

        if (packet_type != Packets.SSH_MSG_KEX_DH_GEX_GROUP)
            throw new IllegalArgumentException(
                "This is not a SSH_MSG_KEX_DH_GEX_GROUP! (" + packet_type
                + ")");

        p = tr.readMPINT();
        g = tr.readMPINT();

        if (tr.remain() != 0)
            throw new IOException("PADDING IN SSH_MSG_KEX_DH_GEX_GROUP!");
    }

    public BigInteger getG() {
        return g;
    }

    public BigInteger getP() {
        return p;
    }
}