public void ShouldThrowExceptionWhenThereAreNoMoreCounters()
{
var ivs = new List <BitString>
{
BitString.Zeroes(128)
};
var subject = new TestableCounter(_aesEngine, ivs);
var firstResult = subject.GetNextIV();
Assert.Throws(Is.TypeOf <Exception>(), () => subject.GetNextIV());
}
public void ShouldAlwaysOfferExactly128Bits(string hex)
{
var ivs = new List <BitString>
{
new BitString(hex),
new BitString(hex),
new BitString(hex)
};
var subject = new TestableCounter(_aesEngine, ivs);
foreach (var iv in ivs)
{
var result = subject.GetNextIV();
Assert.AreEqual(128, result.BitLength);
}
}
public void ShouldAlwaysGetCorrectCounter()
{
var ivs = new List <BitString>
{
BitString.Zeroes(120).ConcatenateBits(new BitString("00")),
BitString.Zeroes(120).ConcatenateBits(new BitString("04")),
BitString.Zeroes(120).ConcatenateBits(new BitString("08")),
BitString.Zeroes(120).ConcatenateBits(new BitString("0C")),
BitString.Zeroes(120).ConcatenateBits(new BitString("10")),
BitString.Zeroes(120).ConcatenateBits(new BitString("14")),
BitString.Zeroes(120).ConcatenateBits(new BitString("18")),
BitString.Zeroes(120).ConcatenateBits(new BitString("1C")),
BitString.Zeroes(120).ConcatenateBits(new BitString("20"))
};
var subject = new TestableCounter(_aesEngine, ivs);
foreach (var iv in ivs)
{
var result = subject.GetNextIV();
Assert.AreEqual(iv, result);
}
}