public static void Hash()
{
#region Incremental Hash
// select the BLAKE2b-256 algorithm
var algorithm = HashAlgorithm.Blake2b_256;
// initialize the state with the algorithm
IncrementalHash.Initialize(algorithm, out var state);
// incrementally update the state with some data
var lines = new[]
{
"It is a period of civil war.\n",
"Rebel spaceships, striking\n",
"from a hidden base, have won\n",
"their first victory against\n",
"the evil Galactic Empire.\n"
};
foreach (var line in lines)
{
IncrementalHash.Update(ref state, Encoding.UTF8.GetBytes(line));
}
// finalize the computation and get the result
var hash = IncrementalHash.Finalize(ref state);
#endregion
Assert.Equal(algorithm.Hash(Encoding.UTF8.GetBytes(string.Concat(lines))), hash);
}
public static void FinalizeWithSpanSuccess(Type algorithmType)
{
var a = (HashAlgorithm)Activator.CreateInstance(algorithmType);
var state = default(IncrementalHash);
Assert.Null(state.Algorithm);
IncrementalHash.Initialize(a, out state);
Assert.Same(a, state.Algorithm);
IncrementalHash.Update(ref state, Utilities.RandomBytes.Slice(0, 100));
IncrementalHash.Update(ref state, Utilities.RandomBytes.Slice(100, 100));
IncrementalHash.Update(ref state, Utilities.RandomBytes.Slice(200, 100));
var actual = new byte[a.HashSize];
IncrementalHash.Finalize(ref state, actual);
Assert.Null(state.Algorithm);
var expected = a.Hash(Utilities.RandomBytes.Slice(0, 300));
Assert.Equal(expected, actual);
}
public static void FinalizeSuccess(HashAlgorithm a)
{
var state = default(IncrementalHash);
Assert.Null(state.Algorithm);
IncrementalHash.Initialize(a, out state);
Assert.Same(a, state.Algorithm);
IncrementalHash.Update(ref state, Utilities.RandomBytes.Slice(0, 100));
IncrementalHash.Update(ref state, Utilities.RandomBytes.Slice(100, 100));
IncrementalHash.Update(ref state, Utilities.RandomBytes.Slice(200, 100));
var actual = IncrementalHash.Finalize(ref state);
Assert.Null(state.Algorithm);
var expected = a.Hash(Utilities.RandomBytes.Slice(0, 300));
Assert.Equal(expected, actual);
}
public static void UpdateInvalid()
{
var state = default(IncrementalHash);
Assert.Throws <InvalidOperationException>(() => IncrementalHash.Update(ref state, Utilities.RandomBytes.Slice(0, 100)));
}
