public static byte[] Hash(byte[] bytes, int bitLength)
{
var digest = new Blake2sDigest(bitLength);
var output = new byte[digest.GetDigestSize()];
digest.BlockUpdate(bytes, 0, bytes.Length);
digest.DoFinal(output, 0);
return(output);
}
protected static byte[] ComputeHash(byte[] message, int bits)
{
var digest = new Blake2sDigest(bits);
var output = new byte[digest.GetDigestSize()];
byte[] msg = message ?? new byte[0];
digest.BlockUpdate(msg, 0, msg.Length);
digest.DoFinal(output, 0);
return(output);
}
public void DoTestReset()
{
// Generate a non-zero key
byte[] key = new byte[32];
for (byte i = 0; i < key.Length; i++)
{
key[i] = i;
}
// Generate some non-zero input longer than the key
byte[] input = new byte[key.Length + 1];
for (byte i = 0; i < input.Length; i++)
{
input[i] = i;
}
// Hash the input
Blake2sDigest digest = new Blake2sDigest(key);
digest.BlockUpdate(input, 0, input.Length);
byte[] hash = new byte[digest.GetDigestSize()];
digest.DoFinal(hash, 0);
// Create a second instance, hash the input without calling doFinal()
Blake2sDigest digest1 = new Blake2sDigest(key);
digest1.BlockUpdate(input, 0, input.Length);
// Reset the second instance and hash the input again
digest1.Reset();
digest1.BlockUpdate(input, 0, input.Length);
byte[] hash1 = new byte[digest.GetDigestSize()];
digest1.DoFinal(hash1, 0);
// The hashes should be identical
if (!AreEqual(hash, hash1))
{
Fail("BLAKE2s mismatch on test vector ",
Hex.ToHexString(hash),
Hex.ToHexString(hash1));
}
}