public bool Validate(string code, string secret)
{
if (string.IsNullOrEmpty(code))
{
throw new ArgumentNullException(nameof(code));
}
if (string.IsNullOrEmpty(secret))
{
throw new ArgumentNullException(nameof(secret));
}
var secretBase32 = Base32String
.Encode(Encoding.UTF8.GetBytes(secret));
var totpProvider = new Totp(
secretKey: Base32Encoding.ToBytes(secretBase32),
mode: OtpHashMode.Sha256,
step: 30);
return(totpProvider.VerifyTotp(
DateTime.UtcNow,
code,
out _,
VerificationWindow.RfcSpecifiedNetworkDelay));
}
public string Generate(string secret)
{
if (string.IsNullOrEmpty(secret))
{
throw new ArgumentNullException(nameof(secret));
}
var secretBase32 = Base32String
.Encode(Encoding.UTF8.GetBytes(secret));
var otpProvider = new Totp(
secretKey: Base32Encoding.ToBytes(secretBase32),
mode: OtpHashMode.Sha256,
step: 30);
return(otpProvider.ComputeTotp());
}
