public GenerateOTPResponse GenerateOtp(GenerateOTPRequest generateOtpRequest)
{
if (!IsNullOrEmpty(generateOtpRequest?.UserId))
{
try
{
var movingFactor = _movingFactorAlgorithm.GetMovingFactor();
var otp = _otpAlgorithm.GenerateOTP(generateOtpRequest.UserId, _otpConfiguration.PrivateKey,
movingFactor,
_otpConfiguration.NumberOfDigitsInOTP);
Console.WriteLine("Generation: OTP : {0} MovingFactor: {1}", otp, movingFactor);
return new GenerateOTPResponse
{
UserId = generateOtpRequest.UserId,
OTP = otp
};
}
catch (ArgumentOutOfRangeException exception)
{
return new GenerateOTPResponse
{
Error = _errorFactory.GetErrorForException(exception)
};
}
}
return new GenerateOTPResponse
{
Error = _errorFactory.GetInvalidRequestError()
};
}
private string GetValidOTP(string userId)
{
var otpService = new OTPService(new HmacBasedOTPAlgorithm(),
new ExpiryBasedMovingFactorAlgorithm(new OTPConfiguration()), new ErrorFactory(), new OTPConfiguration());
var generateOtpRequest = new GenerateOTPRequest {UserId = userId};
GenerateOTPResponse generateOTPResponse = otpService.GenerateOtp(generateOtpRequest);
return generateOTPResponse.OTP;
}
public void ShouldGenerateOTPForAGivenUserId()
{
var userId = Guid.NewGuid().ToString();
var generatedOtp = "321382113asjd72131";
var generateOtpRequest = new GenerateOTPRequest
{
UserId = userId
};
var movingFactor = 87302;
_movingFactorAlgorithm.Expect(algorithm => algorithm.GetMovingFactor()).Return(movingFactor);
_otpAlgorithm.Expect(
algorithm =>
algorithm.GenerateOTP(userId, _otpConfiguration.PrivateKey, movingFactor,
_otpConfiguration.NumberOfDigitsInOTP)).Return(generatedOtp);
var generateOTPResponse = _otpService.GenerateOtp(generateOtpRequest);
Assert.That(generateOTPResponse, Is.Not.Null);
Assert.That(generateOTPResponse.UserId, Is.EqualTo(userId));
Assert.That(generateOTPResponse.OTP, Is.EqualTo(generatedOtp));
}
public void ShouldReturnErrorIfArgumentExceptionIsThrownByAlgorithmForGenerateOTPRequest()
{
var userId = Guid.NewGuid().ToString();
var generateOtpRequest = new GenerateOTPRequest
{
UserId = userId
};
var movingFactor = 87302;
_movingFactorAlgorithm.Expect(algorithm => algorithm.GetMovingFactor()).Return(movingFactor);
_otpAlgorithm.Expect(algorithm =>
algorithm.GenerateOTP(userId, _otpConfiguration.PrivateKey, movingFactor,
_otpConfiguration.NumberOfDigitsInOTP))
.Throw(new ArgumentOutOfRangeException(nameof(userId)));
var generateOTPResponse = _otpService.GenerateOtp(generateOtpRequest);
Assert.That(generateOTPResponse, Is.Not.Null);
Assert.That(generateOTPResponse.UserId, Is.Null);
Assert.That(generateOTPResponse.OTP, Is.Null);
Assert.That(generateOTPResponse.Error, Is.EqualTo(_genericError));
}
