private Payload GetPayload()
{
lock (_lock4GetPayload)
if (_payload == null)
{
if (_version == 2)
{
PrivateKey privkey = PrivateKey.GetPrivateKey(_bm.DB, Key);
if (privkey == null)
{
throw new Exception("PrivateKey not found");
}
MemoryStream payload = new MemoryStream(1000 + Subject.Length + Body.Length); // TODO realy 1000?
Random rnd = new Random();
ulong dt = DateTime.UtcNow.ToUnix() + (ulong)rnd.Next(600) - 300;
payload.Write(dt);
payload.WriteVarInt(Version);
payload.WriteVarInt(Stream);
MemoryStream dataToEncrypt = new MemoryStream(1000 + Subject.Length + Body.Length); // TODO realy 1000?
dataToEncrypt.WriteVarInt(Version);
byte[] publicAddress = privkey.GetPayload4Broadcast();
dataToEncrypt.Write(publicAddress, 0, publicAddress.Length);
Byte encodingType = (byte)EncodingType;
dataToEncrypt.Write(encodingType);
dataToEncrypt.WriteVarStr("Subject:" + Subject + "\nBody:" + Body);
byte[] signature = privkey.Sign(dataToEncrypt.ToArray());
dataToEncrypt.WriteVarInt((UInt64)signature.Length);
dataToEncrypt.Write(signature, 0, signature.Length);
var privEncryptionKey = privkey.Sha512VersionStreamHashFirst32();
var pubEncryptionKey = ECDSA.PointMult(privEncryptionKey);
byte[] bytesToEncrypt = dataToEncrypt.ToArray();
byte[] encrypt = ECDSA.Encrypt(bytesToEncrypt, pubEncryptionKey);
payload.Write(encrypt, 0, encrypt.Length);
_payload = new Payload("broadcast", ProofOfWork.AddPow(payload.ToArray()));
}
}
return(_payload);
}
