static public byte[] FromLegacy(byte[] legacy)
{
if (legacy.Length == 65)
{
var result = new ECDSAPublicKey();
result.PublicKeyData = legacy;
return(result.Serialize());
}
return(legacy);
}
public virtual Task <byte[]> SharedSecret(ECDSAPublicKey Pbk)
{
return(Task.Run(() =>
{
lock (Cache)
{
var clipped = Pbk.FingerprintEncodedClipped;
if (Cache.ContainsKey(clipped))
{
return Cache[clipped];
}
}
var agree = new ECDHBasicAgreement();
agree.Init(PrivateKey);
var result = agree.CalculateAgreement(Pbk.PublicKey).ToByteArrayUnsigned();
result = CryptoHelper.Sha256(result);
lock (Cache)
Cache[Pbk.FingerprintEncodedClipped] = result;
return result;
}));
}