public void Too_Late_Returns_False()
{
// Arrange
var key = Rnd.ByteF.Get(8);
var interval = TotpF.GetCurrentInterval(30) - 1;
var code = TotpF.GenerateCode(key, interval, 6);
// Act
var result = TotpF.VerifyCode(key, code, TotpSettings.Default with {
IntervalTolerance = false
});
public void Incorrect_Key_Returns_False()
{
// Arrange
var key = Rnd.ByteF.Get(8);
var code = TotpF.GenerateCode(key, TotpSettings.Default);
// Act
var result = TotpF.VerifyCode(Rnd.ByteF.Get(8), code, TotpSettings.Default);
// Assert
Assert.False(result);
}
public void Returns_Correct_Interval(int period)
{
// Arrange
var seconds = (ulong)(DateTime.UtcNow - DateTime.UnixEpoch).TotalSeconds;
var expected = seconds / (ulong)period;
// Act
var result = TotpF.GetCurrentInterval(period);
// Assert
Assert.Equal(expected, result);
}
public void Generates_Same_Hash_For_Same_Inputs()
{
// Arrange
var key = Rnd.ByteF.Get(8);
var counter = Rnd.ByteF.Get(8);
// Act
var r0 = TotpF.ComputeHash(key, counter);
var r1 = TotpF.ComputeHash(key, counter);
// Assert
Assert.Equal(r0, r1);
}
public void Generates_Different_Hash_For_Different_Counters()
{
// Arrange
var key = Rnd.ByteF.Get(8);
var c0 = Rnd.ByteF.Get(8);
var c1 = Rnd.ByteF.Get(8);
// Act
var r0 = TotpF.ComputeHash(key, c0);
var r1 = TotpF.ComputeHash(key, c1);
// Assert
Assert.NotEqual(r0, r1);
}
public void Generates_Different_Hash_For_Different_Keys()
{
// Arrange
var k0 = Rnd.ByteF.Get(8);
var k1 = Rnd.ByteF.Get(8);
var counter = Rnd.ByteF.Get(8);
// Act
var r0 = TotpF.ComputeHash(k0, counter);
var r1 = TotpF.ComputeHash(k1, counter);
// Assert
Assert.NotEqual(r0, r1);
}
public void Generates_256bit_Hash()
{
// Arrange
var key = Rnd.ByteF.Get(8);
var counter = Rnd.ByteF.Get(8);
var expected = new HMACSHA256(key).ComputeHash(counter);
// Act
var result = TotpF.ComputeHash(key, counter);
// Assert
Assert.Equal(expected, result);
Assert.Equal(32, result.Length);
}
public void Uses_Correct_Period()
{
// Arrange
var key = Rnd.ByteF.Get(8);
var period = Rnd.Int;
var settings = TotpSettings.Default with {
PeriodSeconds = period
};
var interval = TotpF.GetCurrentInterval(period);
var expected = TotpF.GenerateCode(key, interval, TotpSettings.Default.CodeLength);
// Act
var result = TotpF.GenerateCode(key, settings);
// Assert
Assert.Equal(expected, result);
}
public void Uses_Correct_Code_Length(int length)
{
// Arrange
var key = Rnd.ByteF.Get(8);
var settings = TotpSettings.Default with {
CodeLength = length
};
var interval = TotpF.GetCurrentInterval(TotpSettings.Default.PeriodSeconds);
var expected = TotpF.GenerateCode(key, interval, length);
// Act
var result = TotpF.GenerateCode(key, settings);
// Assert
Assert.Equal(expected, result);
}
}