testEncodingWithCasing(base32Hex(), "", "");
    testEncodingWithCasing(base32Hex(), "f", "CO======");
    testEncodingWithCasing(base32Hex(), "fo", "CPNG====");
    testEncodingWithCasing(base32Hex(), "foo", "CPNMU===");
    testEncodingWithCasing(base32Hex(), "foob", "CPNMUOG=");
    testEncodingWithCasing(base32Hex(), "fooba", "CPNMUOJ1");
    testEncodingWithCasing(base32Hex(), "foobar", "CPNMUOJ1E8======");
  }

  private static final int INPUTS_MASK = 0xFFF;

  enum EncodingOption {
    BASE64(BaseEncoding.base64()),
    BASE64_URL(BaseEncoding.base64Url()),
    BASE32(BaseEncoding.base32()),
    BASE32_HEX(BaseEncoding.base32Hex()),
    BASE16(BaseEncoding.base16());

    final BaseEncoding encoding;

    EncodingOption(BaseEncoding encoding) {
      this.encoding = encoding;
    }
  }

   */
  public static BaseEncoding base32() {
    return BASE32;
  }

  private static final BaseEncoding BASE32_HEX =
      new StandardBaseEncoding("base32Hex()", "0123456789ABCDEFGHIJKLMNOPQRSTUV", '=');

  /**
   * The "base32hex" encoding specified by <a
   * href="http://tools.ietf.org/html/rfc4648#section-7">RFC 4648 section 7</a>, Base 32 Encoding

   */
  public static BaseEncoding base32() {
    return BASE32;
  }

  private static final BaseEncoding BASE32_HEX =
      new StandardBaseEncoding("base32Hex()", "0123456789ABCDEFGHIJKLMNOPQRSTUV", '=');

  /**
   * The "base32hex" encoding specified by <a
   * href="http://tools.ietf.org/html/rfc4648#section-7">RFC 4648 section 7</a>, Base 32 Encoding

 */

// An Encoding is a radix 32 encoding/decoding scheme, defined by a
// 32-character alphabet. The most common is the "base32" encoding
// introduced for SASL GSSAPI and standardized in RFC 4648.
// The alternate "base32hex" encoding is used in DNSSEC.
type Encoding struct {
	encode    [32]byte   // mapping of symbol index to symbol byte value
	decodeMap [256]uint8 // mapping of symbol byte value to symbol index
	padChar   rune
}