Esempio n. 1
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        /// <summary>
        /// Verify an OTP value
        /// </summary>
        /// <param name="initialStep">The initial step to try</param>
        /// <param name="valueToVerify">The value to verify</param>
        /// <param name="matchedStep">Output parameter that provides the step where the match was found.  If no match was found it will be 0</param>
        /// <param name="window">The window to verify</param>
        /// <returns>True if a match is found</returns>
        protected bool Verify(long initialStep, string valueToVerify, out long matchedStep, VerificationWindow window)
        {
            if (window == null)
            {
                window = new VerificationWindow();
            }
            foreach (var frame in window.ValidationCandidates(initialStep))
            {
                if (Compute(frame, HashMode) != valueToVerify)
                {
                    continue;
                }

                matchedStep = frame;
                return(true);
            }

            matchedStep = 0;
            return(false);
        }
Esempio n. 2
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 private bool VerifyTotpForSpecificTime(DateTime timestamp, string totp, VerificationWindow window, out long timeStepMatched) => Verify(CalculateTimeStepFromTimestamp(timestamp), totp, out timeStepMatched, window);
Esempio n. 3
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 /// <summary>
 /// Verify a value that has been provided with the calculated value
 /// </summary>
 /// <param name="timestamp">The timestamp to use</param>
 /// <param name="totp">the trial TOTP value</param>
 /// <param name="timeStepMatched">
 /// This is an output parameter that gives that time step that was used to find a match.
 /// This is usefule in cases where a TOTP value should only be used once.  This value is a unique identifier of the
 /// time step (not the value) that can be used to prevent the same step from being used multiple times
 /// </param>
 /// <param name="window">The window of steps to verify</param>
 /// <returns>True if there is a match.</returns>
 public bool VerifyTotp(DateTime timestamp, string totp, out long timeStepMatched, VerificationWindow window = null) => VerifyTotpForSpecificTime(_correctedTime.GetCorrectedTime(timestamp), totp, window, out timeStepMatched);
Esempio n. 4
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 /// <summary>
 /// Verify a value that has been provided with the calculated value.
 /// </summary>
 /// <remarks>
 /// It will be corrected against a corrected UTC time using the provided time correction.  If none was provided then simply the current UTC will be used.
 /// </remarks>
 /// <param name="totp">the trial TOTP value</param>
 /// <param name="timeStepMatched">
 /// This is an output parameter that gives that time step that was used to find a match.
 /// This is useful in cases where a TOTP value should only be used once.  This value is a unique identifier of the
 /// time step (not the value) that can be used to prevent the same step from being used multiple times
 /// </param>
 /// <param name="window">The window of steps to verify</param>
 /// <returns>True if there is a match.</returns>
 public bool VerifyTotp(string totp, out long timeStepMatched, VerificationWindow window = null) => VerifyTotpForSpecificTime(_correctedTime.CorrectedUtcNow, totp, window, out timeStepMatched);