public void CryptoPbkdf2()
{
const int KeyLength = 42;
IKeyDerivationFunction kdf = new Pbkdf2();
ICryptoRandomService randomGenerator = CommonMocksAndStubs.CryptoRandomService();
byte[] salt = randomGenerator.GetRandomBytes(kdf.ExpectedSaltSizeBytes);
int cost = kdf.RecommendedCost(KeyDerivationCostType.Low);
SecureString password = CryptoUtils.StringToSecureString("Das ist kein gutes Passwort");
byte[] key = kdf.DeriveKeyFromPassword(password, KeyLength, salt, cost);
Assert.AreEqual(KeyLength, key.Length);
// Same parameters must result in the same output
byte[] key2 = kdf.DeriveKeyFromPassword(password, KeyLength, salt, cost);
Assert.AreEqual(key, key2);
}
public void MeasureTime()
{
IKeyDerivationFunction kdf = new Pbkdf2();
ICryptoRandomSource randomSource = CommonMocksAndStubs.CryptoRandomService();
SecureString password = CryptoUtils.StringToSecureString("candidate");
byte[] salt = randomSource.GetRandomBytes(kdf.ExpectedSaltSizeBytes);
int iterations = 10000;
Stopwatch watch = new Stopwatch();
watch.Start();
kdf.DeriveKeyFromPassword(password, 32, salt, iterations);
watch.Stop();
Console.WriteLine("Pbkdf2 time for {0} iterations: {1}ms", iterations, watch.ElapsedMilliseconds);
}