public static byte[] hexDecode(String s) {
try {
return Hex.decodeHex(s.toCharArray());
} catch (DecoderException e) {
throw new ClientProblemException(
"Hex content is not valid hex: " + e.getMessage() + ": " + s);
}
}
private static String hexEncode(byte[] bytes) {
return new String(Hex.encodeHex(bytes));
}