public void TestSplits()
{
var data = Enumerable.Range(0, 256).Select(i => (byte)i).ToArray().AsSpan();
using (var hasher = new Blake2s())
{
var hash1 = new byte[hasher.HashLen];
var hash2 = new byte[hasher.HashLen];
for (int i = 0; i <= data.Length; ++i)
{
hasher.AppendData(data.Slice(0, i));
hasher.GetHashAndReset(hash1);
for (int j = 0; j <= i; ++j)
{
for (int k = j; k <= i; ++k)
{
hasher.AppendData(data.Slice(0, j));
hasher.AppendData(data.Slice(j, k - j));
hasher.AppendData(data.Slice(k, i - k));
hasher.GetHashAndReset(hash2);
Assert.Equal(hash1, hash2);
}
}
}
}
}
public void TestVectors()
{
var s = File.ReadAllText("Vectors/blake2-kat.json");
var json = JArray.Parse(s);
using (var hasher = new Blake2s())
{
byte[] hash = new byte[hasher.HashLen];
foreach (var vector in json)
{
var name = (string)vector["hash"];
var input = Hex.Decode((string)vector["in"]);
var key = (string)vector["key"];
var output = Hex.Decode((string)vector["out"]);
if (name == "blake2s" && String.IsNullOrEmpty(key))
{
hasher.AppendData(input);
hasher.GetHashAndReset(hash);
Assert.Equal(output, hash);
}
}
}
}
public void TestLargeInput()
{
var factor = 1031;
var data = new byte[factor];
using (var hasher = new Blake2s())
{
int count = 4 * factor * factor;
for (int i = 0; i < count; ++i)
{
hasher.AppendData(data);
}
var hash = new byte[hasher.HashLen];
hasher.GetHashAndReset(hash);
string expected = "3c965aaac533c5a1715a40ae8beaf8d1fe1242502f2c30db34239b16c54b1d78";
string actual = Hex.Encode(hash);
Assert.Equal(expected, actual);
}
}