public void TestKeyDerivation()
{
byte[] key = new byte[32];
Arrays.fill(key, 0x02);
byte[] result = UnidentifiedAccess.DeriveAccessKeyFrom(key);
CollectionAssert.AreEqual(EXPECTED_RESULT, result);
}
public bool VerifyUnidentifiedAccess(byte[] theirUnidentifiedAccessVerifier)
{
if (theirUnidentifiedAccessVerifier == null || theirUnidentifiedAccessVerifier.Length == 0)
{
return(false);
}
byte[] unidentifiedAccessKey = UnidentifiedAccess.DeriveAccessKeyFrom(Key);
throw new NotImplementedException();
//TODO
/*
* Mac mac = Mac.getInstance("HmacSHA256");
* mac.init(new SecretKeySpec(unidentifiedAccessKey, "HmacSHA256"));
*
* byte[] ourUnidentifiedAccessVerifier = mac.doFinal(new byte[32]);
*
* return MessageDigest.isEqual(theirUnidentifiedAccessVerifier, ourUnidentifiedAccessVerifier);
*/
}
public bool VerifyUnidentifiedAccess(byte[] theirUnidentifiedAccessVerifier)
{
try
{
if (theirUnidentifiedAccessVerifier == null || theirUnidentifiedAccessVerifier.Length == 0)
{
return(false);
}
byte[] unidentifiedAccessKey = UnidentifiedAccess.DeriveAccessKeyFrom(key);
HMAC mac = new HMACSHA256(unidentifiedAccessKey);
byte[] ourUnidentifiedAccessVerifier = mac.ComputeHash(new byte[32]);
return(Enumerable.SequenceEqual(theirUnidentifiedAccessVerifier, ourUnidentifiedAccessVerifier));
}
catch (InvalidKeyException ex)
{
throw new ArgumentException(null, ex);
}
}