SMBUtil.writeInt4(this.signSequence, data, index);
            update(data, offset, length);
            System.arraycopy(digest(), 0, data, index, 8);
            if ( this.bypass ) {
                this.bypass = false;
                System.arraycopy("BSRSPYL ".getBytes(), 0, data, index, 8);
            }
        }
        catch ( Exception ex ) {
            log.error("Signature failed", ex);

      if (initialBytes == null) {
        return checkNotNull(bytes);
      } else {
        byte[] result = new byte[initialBytes.length + bytes.length];
        System.arraycopy(initialBytes, 0, result, 0, initialBytes.length);
        System.arraycopy(bytes, 0, result, initialBytes.length, bytes.length);
        return result;
      }
    }

    @Override
    public byte[] getSinkContents() throws IOException {

                SMBUtil.writeInt2(hashAlgo, dst, dstIndex);
                dstIndex += 2;
            }
        }

        if ( this.salt != null ) {
            System.arraycopy(this.salt, 0, dst, dstIndex, this.salt.length);
            dstIndex += this.salt.length;
        }

        return dstIndex - start;
    }


    /**
     * {@inheritDoc}
     *

        int start = bufferIndex;

        if ((server.capabilities & CAP_EXTENDED_SECURITY) == 0) {
            server.encryptionKey = new byte[server.encryptionKeyLength];
            System.arraycopy( buffer, bufferIndex,
                    server.encryptionKey, 0, server.encryptionKeyLength );
            bufferIndex += server.encryptionKeyLength;
            if( byteCount > server.encryptionKeyLength ) {

        System.arraycopy(data, offset + SIGNATURE_OFFSET, sig, 0, SIGNATURE_LENGTH);

        int index = offset + SIGNATURE_OFFSET;
        for ( int i = 0; i < SIGNATURE_LENGTH; i++ )
            data[ index + i ] = 0;

        this.digest.update(data, offset, length);

        byte[] cmp = new byte[SIGNATURE_LENGTH];
        System.arraycopy(this.digest.doFinal(), 0, cmp, 0, SIGNATURE_LENGTH);

            System.arraycopy( password, 0, dst, dstIndex, passwordLength );
            dstIndex += passwordLength;
        } else {
            // no password in tree connect
            dst[dstIndex++] = (byte)0x00;
        }
        dstIndex += writeString( path, dst, dstIndex );
        try {
            System.arraycopy( service.getBytes( "ASCII" ), 0, dst, dstIndex, service.length() );

    }
  }

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

  public abstract static class TestIntegerListGenerator implements TestListGenerator<Integer> {
    @Override

    }
  }

  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);
    return result;
  }

  public abstract static class TestByteListGenerator implements TestListGenerator<Byte> {
    @Override

            ci += 5;
            c[ci++] = ':';
            do {
                if( si == length ) {
                    int n = 16 - s;
                    System.arraycopy( SPACE_CHARS, 0, c, ci, n * 3 );
                    ci += n * 3;
                    System.arraycopy( SPACE_CHARS, 0, d, s, n );
                    break;
                }
                c[ci++] = ' ';
                i = src[srcIndex + si] & 0xFF;

        byte[] dk = deriveKeyAES(baseKey, cst); // Checksum key
        try {
            Mac m = Mac.getInstance("HmacSHA1");
            m.init(new SecretKeySpec(dk, HMAC_KEY));
            System.arraycopy(m.doFinal(input), 0, output, 0, 12);
            return output;
        }
        finally {
            Arrays.fill(dk, 0, dk.length, (byte) 0);
        }
    }