public static int enc_uint16be( short s, byte[] dst, int di ) {
        dst[di++] = (byte)((s >> 8) & 0xFF);
        dst[di] = (byte)(s & 0xFF);
        return 2;
    }
    public static int enc_uint32be( int i, byte[] dst, int di ) {
        dst[di++] = (byte)((i >> 24) & 0xFF);
        dst[di++] = (byte)((i >> 16) & 0xFF);
        dst[di++] = (byte)((i >> 8) & 0xFF);
        dst[di] = (byte)(i & 0xFF);
        return 4;
    }

    }

    // KGS!@#$%
    static final byte[] S8 = {
        (byte) 0x4b, (byte) 0x47, (byte) 0x53, (byte) 0x21, (byte) 0x40, (byte) 0x23, (byte) 0x24, (byte) 0x25
    };


    /*
     * Accepts key multiple of 7
     * Returns enc multiple of 8
     * Multiple is the same like: 21 byte key gives 24 byte result
     */
    static void E ( byte[] key, byte[] data, byte[] e ) throws ShortBufferException {

      Byte[] suffix = {(byte) 86, (byte) 99};
      Byte[] all = concat(concat(prefix, elements), suffix);
      return asList(all).subList(2, elements.length + 2);
    }
  }

  private static Byte[] concat(Byte[] left, Byte[] right) {
    Byte[] result = new Byte[left.length + right.length];
    System.arraycopy(left, 0, result, 0, left.length);
    System.arraycopy(right, 0, result, left.length, right.length);

	*b = block{}
}

type headerV7 [blockSize]byte

func (h *headerV7) name() []byte     { return h[000:][:100] }
func (h *headerV7) mode() []byte     { return h[100:][:8] }
func (h *headerV7) uid() []byte      { return h[108:][:8] }
func (h *headerV7) gid() []byte      { return h[116:][:8] }
func (h *headerV7) size() []byte     { return h[124:][:12] }
func (h *headerV7) modTime() []byte  { return h[136:][:12] }

    static void writeInt2( int val, byte[] dst, int dstIndex ) {
        dst[dstIndex++] = (byte)(( val >> 8 ) & 0xFF );
        dst[dstIndex] = (byte)( val & 0xFF );
    }
    static void writeInt4( int val, byte[] dst, int dstIndex ) {
        dst[dstIndex++] = (byte)(( val >> 24 ) & 0xFF );
        dst[dstIndex++] = (byte)(( val >> 16 ) & 0xFF );
        dst[dstIndex++] = (byte)(( val >> 8 ) & 0xFF );

    public static int enc_uint16be ( short s, byte[] dst, int di ) {
        dst[ di++ ] = (byte) ( ( s >> 8 ) & 0xFF );
        dst[ di ] = (byte) ( s & 0xFF );
        return 2;
    }


    public static int enc_uint32be ( int i, byte[] dst, int di ) {
        dst[ di++ ] = (byte) ( ( i >> 24 ) & 0xFF );
        dst[ di++ ] = (byte) ( ( i >> 16 ) & 0xFF );
        dst[ di++ ] = (byte) ( ( i >> 8 ) & 0xFF );

  public void testCollisionsDueToIncorrectSignExtension() {
    byte[] col1 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0x80};
    byte[] col2 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0x81};
    byte[] col3 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0xff};

    ImmutableSet<HashCode> hashCodes =
        ImmutableSet.of(

  public void testCollisionsDueToIncorrectSignExtension() {
    byte[] col1 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0x80};
    byte[] col2 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0x81};
    byte[] col3 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0xff};

    ImmutableSet<HashCode> hashCodes =
        ImmutableSet.of(

    private byte[] challenge;
    private String target;
    private byte[] context;
    private byte[] targetInformation;

    private static final Map<String, byte[]> TARGET_INFO_CACHE = new HashMap<>();


    private static byte[] getDefaultTargetInfo ( CIFSContext tc ) {
        String domain = tc.getConfig().getDefaultDomain();
        byte[] ti = TARGET_INFO_CACHE.get(domain);

    public int bits() {
      return 64;
    }

    @Override
    public byte[] asBytes() {
      return new byte[] {
        (byte) hash,
        (byte) (hash >> 8),
        (byte) (hash >> 16),
        (byte) (hash >> 24),
        (byte) (hash >> 32),
        (byte) (hash >> 40),
        (byte) (hash >> 48),
        (byte) (hash >> 56)
      };
    }

    @Override
    public int asInt() {