import java.math.BigInteger;
import java.util.Date;

import jcifs.SmbConstants;
import jcifs.smb.SID;


@SuppressWarnings ( "javadoc" )
public class PacDataInputStream {

    private DataInputStream dis;
    private int size;


    public PacDataInputStream ( InputStream in ) throws IOException {
        this.dis = new DataInputStream(in);
        this.size = in.available();
    }

    private int type;
    private byte[] checksum;


    public PacSignature ( byte[] data ) throws PACDecodingException {
        try {
            PacDataInputStream bufferStream = new PacDataInputStream(new DataInputStream(new ByteArrayInputStream(data)));
            this.type = bufferStream.readInt();
            switch ( this.type ) {
            case KERB_CHECKSUM_HMAC_MD5:

    public Pac ( byte[] data, Map<Integer, KerberosKey> keys ) throws PACDecodingException {
        byte[] checksumData = data.clone();
        try {
            PacDataInputStream pacStream = new PacDataInputStream(new DataInputStream(new ByteArrayInputStream(data)));

            if ( data.length <= 8 )
                throw new PACDecodingException("Empty PAC");

    private SID[] extraSids;
    private int userAccountControl;
    private int userFlags;


    public PacLogonInfo ( byte[] data ) throws PACDecodingException {
        try {
            PacDataInputStream pacStream = new PacDataInputStream(new DataInputStream(new ByteArrayInputStream(data)));

            // Skip firsts
            pacStream.skipBytes(20);

            // Dates
            this.logonTime = pacStream.readFiletime();