package com.trilead.ssh2.packets;

import java.io.IOException;

import java.math.BigInteger;

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

    byte[] hostKey;
    BigInteger f;
    byte[] signature;

    public PacketKexDhGexReply(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_REPLY)
            throw new IOException("This is not a SSH_MSG_KEX_DH_GEX_REPLY! (" + packet_type + ")");

        hostKey = tr.readByteString();
        f = tr.readMPINT();
        signature = tr.readByteString();

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

    public BigInteger getF() {
        return f;
    }

    public byte[] getHostKey() {
        return hostKey;
    }

    public byte[] getSignature() {
        return signature;
    }
}