/// <summary>
/// Creates a new handshake request(client-side) and returns it.
/// </summary>
/// <param name="link">The ClientLink to create the request packet for.</param>
/// <returns>The created message.</returns>
public static Message CreateAuthRequest(ClientLink link)
{
Message msg = new Message(MessageType.AuthRequest, 0x00);
byte[] timestamp = GetTimestamp();
msg.Store["ecdh_public_key"] = link.Suite.GetKeyExchangeData().Concat(timestamp).ToArray();
msg.Store["timestamp"] = timestamp;
if (link.AuthenticateSelf)
{
msg.Store["rsa_public_key"] = Encoding.UTF8.GetBytes(RsaHelpers.PemSerialize(link.Certificate.Public));
msg.Store["rsa_signature"] = link.Signature;
msg.Store["ecdh_signature"] = RsaHelpers.SignData(msg.Store["ecdh_public_key"], link.Certificate);
}
else
{
msg.Store["rsa_public_key"] = new byte[0];
msg.Store["rsa_signature"] = new byte[0];
msg.Store["ecdh_signature"] = new byte[0];
}
if (link.AttestationToken != null)
{
msg.Store["attestation_token"] = link.AttestationToken;
}
return(msg);
}
/// <summary>
/// Creates a new handshake response(server-side) and returns it.
/// </summary>
/// <param name="link">The ServerLink to create the resposne packet for.</param>
/// <returns>The created message.</returns>
public static Message CreateAuthResponse(EncryptedLink link)
{
Message msg = new Message(MessageType.AuthResponse, 0x00);
byte[] timestamp = GetTimestamp();
msg.Store["rsa_public_key"] = Encoding.UTF8.GetBytes(RsaHelpers.PemSerialize(link.Certificate.Public));
msg.Store["rsa_signature"] = link.Signature;
msg.Store["ecdh_public_key"] = link.Suite.GetKeyExchangeData().Concat(timestamp).ToArray();
msg.Store["ecdh_signature"] = RsaHelpers.SignData(msg.Store["ecdh_public_key"], link.Certificate);
msg.Store["shared_salt"] = link.Suite.SharedSalt;
msg.Store["shared_salt_signature"] = RsaHelpers.SignData(link.Suite.SharedSalt, link.Certificate);
msg.Store["timestamp"] = timestamp;
return(msg);
}
