/// <summary>
/// Create a TOTP instance
/// </summary>
/// <param name="secretKey">The secret key to use in TOTP calculations</param>
/// <param name="step">The time window step amount to use in calculating time windows. The default is 30 as recommended in the RFC</param>
/// <param name="mode">The hash mode to use</param>
/// <param name="totpSize">The number of digits that the returning TOTP should have. The default is 6.</param>
/// <param name="timeCorrection">If required, a time correction can be specified to compensate of an out of sync local clock</param>
public Totp(IKeyProvider secretKey, int step = 30, OtpHashMode mode = OtpHashMode.Sha1, int totpSize = 6, TimeCorrection timeCorrection = null)
: base(secretKey, mode)
{
VerifyParameters(step, totpSize);
this.step = step;
this.totpSize = totpSize;
// we never null check the corrected time object. Since it's readonly, we'll ensure that it isn't null here and provide neatral functionality in this case.
this.correctedTime = timeCorrection ?? TimeCorrection.UncorrectedInstance;
}
/// <summary>
/// Create a TOTP instance
/// </summary>
/// <param name="secretKey">The secret key to use in TOTP calculations</param>
/// <param name="step">The time window step amount to use in calculating time windows. The default is 30 as recommended in the RFC</param>
/// <param name="mode">The hash mode to use</param>
/// <param name="totpSize">The number of digits that the returning TOTP should have. The default is 6.</param>
/// <param name="timeCorrection">If required, a time correction can be specified to compensate of an out of sync local clock</param>
public Totp(IKeyProvider secretKey, int step = 30, OtpHashMode mode = OtpHashMode.Sha1, int totpSize = 6, TimeCorrection timeCorrection = null)
: base(secretKey, mode)
{
VerifyParameters(step, totpSize);
this.step = step;
this.totpSize = totpSize;
// we never null check the corrected time object. Since it's readonly, we'll ensure that it isn't null here and provide neatral functionality in this case.
this.correctedTime = timeCorrection ?? TimeCorrection.UncorrectedInstance;
}