private static void PerformTest(string expected, DateTime expectedValidUntil, TimeSpan timeSinceEpoch, int hashLevel)
{
using (var otpg = new TimeBasedPasswordGenerator())
{
if (hashLevel == 2)
{
otpg.HashAlgorithm = new Sha256HashAlgorithm();
otpg.SetSecret((byte[])TestSecretKeySha256.Clone());
}
else if (hashLevel == 3)
{
otpg.HashAlgorithm = new Sha512HashAlgorithm();
otpg.SetSecret((byte[])TestSecretKeySha512.Clone());
}
else
{
otpg.HashAlgorithm = new Sha1HashAlgorithm();
otpg.SetSecret((byte[])TestSecretKeySha1.Clone());
}
otpg.Timestamp = UnixEpoch.Add(timeSinceEpoch);
otpg.PasswordLength = TestPasswordLength;
Assert.AreEqual(expected, otpg.GeneratedPassword);
Assert.AreEqual(expectedValidUntil, otpg.ValidUntilUtc);
}
}
public TOTP(byte[] secret)
{
this.totp = new TimeBasedPasswordGenerator(true, secret);
this.totp.TimeInterval = TimeSpan.FromSeconds(period);
this.totp.PasswordLength = digits;
this.secret = secret;
}
public bool ConfirmCode(string code)
{
var time = DateTime.UtcNow;
Debug.WriteLine(time);
if (this.totp.GeneratedPassword.Equals(code))
{
return(true);
}
for (var i = 0; i < tolerance; i++)
{
var tmpTotp = new TimeBasedPasswordGenerator(true, this.secret);
tmpTotp.TimeInterval = TimeSpan.FromSeconds(period);
tmpTotp.PasswordLength = digits;
time = time.AddSeconds(-period);
tmpTotp.Timestamp = time;
var checkcode = tmpTotp.GeneratedPassword;
if (checkcode.Equals(code))
{
return(true);
}
}
return(false);
}
