public void Negotiate()
{
RSAKeys rsaKeys = new RSAKeys();
BaseStream.Write(rsaKeys.PublicKey);
RSAParameters localPrivateKey = rsaKeys.PrivateKey;
BaseStream.Flush();
RSAParameters remotePublicKey = BaseStream.ReadRSAParameters();
Random rnd = Processor.CreateRandom();
int nbTries = 0;
byte[] id;
do
{
if (nbTries > 100)
{
throw new IOException("Can't find a different ID to use.");
}
this.LocalID = rnd.Next();
id = this.LocalID.GetBytes();
BaseStream.WriteWrapped(RSA.Encrypt(id, remotePublicKey));
this.RemoteID = RSA.Decrypt(BaseStream.ReadWrapped(), localPrivateKey).ToInt32();
++nbTries;
} while(this.LocalID == this.RemoteID);
byte[] key;
byte[] iv;
if (this.RemoteID < LocalID)
{
AES.ProduceKeyIV(out key, out iv);
BaseStream.WriteWrapped(RSA.Encrypt(key, remotePublicKey));
BaseStream.WriteWrapped(RSA.Encrypt(iv, remotePublicKey));
BaseStream.Flush();
}
else
{
key = RSA.Decrypt(BaseStream.ReadWrapped(), localPrivateKey);
iv = RSA.Decrypt(BaseStream.ReadWrapped(), localPrivateKey);
}
this.EncryptedStream = new OverAESStream(BaseStream, key, iv, NbIterations);
this.WriteWrapped(id);
this.Flush();
if (this.ReadWrapped().ToInt32() != RemoteID)
{
throw new IOException("Can't connect to remote point.");
}
}
/// <summary>
/// Decrypt data with the private part of the key provided.
/// </summary>
public static byte[] Decrypt(byte[] data, RSAKeys keys, bool padding = true)
{
return(Decrypt(data, keys.PrivateKey, padding));
}
/// <summary>
/// Encrypt data with the public part of the key provided.
/// </summary>
public static byte[] Encrypt(byte[] data, RSAKeys keys, bool padding = true)
{
return(Encrypt(data, keys.PublicKey, padding));
}