/// <summary>
/// Helper to validate a BLAKE2 hash.
/// </summary>
/// <param name="data">Data to hash.</param>
/// <param name="key">Key to hash.</param>
/// <param name="expectedHash">Expected value.</param>
private void CheckHash(byte[] data, byte[] key, byte[] expectedHash)
{
ulong[][] blocks = Blake2b.GetDataBlocks(data, key);
byte[] hash = Blake2b.Hash(blocks, data.Length, (byte)key.Length, 64);
for (int i = 0; i < 64; i++)
{
Assert.AreEqual(expectedHash[i], hash[i], $"hash byte #{i}");
}
}