// https://csharp.hotexamples.com/examples/Org.BouncyCastle.Crypto.Macs/Poly1305/BlockUpdate/php-poly1305-blockupdate-method-examples.html
public static void Poly1305AES()
{
Org.BouncyCastle.Crypto.IMac mac = new Org.BouncyCastle.Crypto.Macs.Poly1305(new Org.BouncyCastle.Crypto.Engines.AesEngine());
byte[] key = null;
byte[] n = new byte[16];
byte[] input = System.Text.Encoding.UTF8.GetBytes("Hello World!");
byte[] output = new byte[mac.GetMacSize()];
for (int loop = 0; loop < 13; loop++)
{
mac.Init(new Org.BouncyCastle.Crypto.Parameters.ParametersWithIV(new Org.BouncyCastle.Crypto.Parameters.KeyParameter(key), n));
mac.BlockUpdate(input, 0, input.Length);
mac.DoFinal(output, 0);
}
}
private void Poly1305CheckHash(byte[] keyMaterial, byte[] input, byte[] tag)
{
Org.BouncyCastle.Crypto.Macs.Poly1305 poly1305 = new Org.BouncyCastle.Crypto.Macs.Poly1305();
poly1305.Init(new Org.BouncyCastle.Crypto.Parameters.KeyParameter(keyMaterial));
poly1305.BlockUpdate(input, 0, input.Length);
byte[] mac = new byte[poly1305.GetMacSize()];
poly1305.DoFinal(mac, 0);
if (!Org.BouncyCastle.Utilities.Arrays.AreEqual(tag, mac))
{
System.Console.WriteLine("fail");
// Fail("rfc7539", Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(tag), Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(mac));
}
}