private static void Sha256HmacTests()
{
byte[] key = Encoding.UTF8.GetBytes("ABCD");
byte[] message = Encoding.UTF8.GetBytes("ABCD");
using ProtectedMemory protectedKey = ProtectedMemory.Allocate(key.Length);
using ProtectedMemory protectedMessage = ProtectedMemory.Allocate(message.Length);
protectedKey.Write(key, 0);
protectedMessage.Write(message, 0);
Sha256ProtectedCryptoProvider sha256 = new Sha256ProtectedCryptoProvider();
Console.WriteLine(sha256.ComputeHmac(protectedKey, protectedMessage));
}
private static void Sha256HmacPerfTest()
{
byte[] key = Encoding.UTF8.GetBytes("ABCD");
byte[] message = Encoding.UTF8.GetBytes("ABCD");
using ProtectedMemory protectedKey = ProtectedMemory.Allocate(key.Length);
using ProtectedMemory protectedMessage = ProtectedMemory.Allocate(message.Length);
protectedKey.Write(key, 0);
protectedMessage.Write(message, 0);
Sha256ProtectedCryptoProvider sha256 = new Sha256ProtectedCryptoProvider();
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
for (int i = 0; i < 250000; i++)
{
_ = sha256.ComputeHmac(protectedKey, protectedMessage);
}
stopwatch.Stop();
Console.WriteLine("250000 HMACs done in " + stopwatch.Elapsed.ToString());
double t = stopwatch.ElapsedMilliseconds / 250000d;
Console.WriteLine(" * " + t.ToString() + " ms per HMAC.");
Console.WriteLine(" * " + (1000d / t).ToString() + " HMACs per second.");
}