public static void performPoly1305MAC(string text)
{
Chilkat.Crypt2 crypt = new Chilkat.Crypt2();
bool success = crypt.UnlockComponent("Anything for 30-day trial");
if (success != true)
{
Console.WriteLine(crypt.LastErrorText);
return;
}
// Set the MAC algorithm to poly1305
crypt.MacAlgorithm = "poly1305";
// EncodingMode specifies the encoding of the output for
// encryption, and the input for decryption.
// Valid modes are (case insensitive) "Base64", "modBase64", "Base32", "Base58", "UU",
// "QP" (for quoted-printable), "URL" (for url-encoding), "Hex",
// "Q", "B", "url_oauth", "url_rfc1738", "url_rfc2396", and "url_rfc3986".
crypt.EncodingMode = "hex";
// Poly1305 always uses a 32-byte (256-bit) MAC key.
string keyHex = "1c9240a5eb55d38af333888604f6b5f0473917c1402b80099dca5cbc207075c0";
success = crypt.SetMacKeyEncoded(keyHex, "hex");
string plainText = "'Twas brillig, and the slithy toves\nDid gyre and gimble in the wabe:\nAll mimsy were the borogoves,\nAnd the mome raths outgrabe.";
// The computed tag should match the Tag shown below.
// (Note: hexidecimal encoding is case insensitive.)
string encTag = crypt.MacStringENC(text);
//Console.WriteLine(encTag);
}