package com.trilead.ssh2.packets;

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

    String userName;
    String serviceName;
    String[] submethods;

    public PacketUserauthRequestInteractive(String serviceName, String user, String[] submethods) {
        this.serviceName = serviceName;
        this.userName = user;
        this.submethods = submethods;
    }

    public byte[] getPayload() {
        if (payload == null) {
            TypesWriter tw = new TypesWriter();
            tw.writeByte(Packets.SSH_MSG_USERAUTH_REQUEST);
            tw.writeString(userName);
            tw.writeString(serviceName);
            tw.writeString("keyboard-interactive");
            tw.writeString(""); // draft-ietf-secsh-newmodes-04.txt says that
            // the language tag should be empty.
            tw.writeNameList(submethods);
            payload = tw.getBytes();
        }

        return payload;
    }
}