public void testRfc2202_hmacSha1_case4() {
    byte[] key = base16().lowerCase().decode("0102030405060708090a0b0c0d0e0f10111213141516171819");
    byte[] data = fillByteArray(50, 0xcd);

    checkSha1("4c9007f4026250c6bc8414f9bf50c86c2d7235da", key, data);
  }

  public void testRfc2202_hmacSha1_case5() {
    byte[] key = fillByteArray(20, 0x0c);
    String data = "Test With Truncation";