public static void EncryptionKeyRequest(MinecraftClient client, IPacket _packet) { var packet = (EncryptionKeyRequestPacket)_packet; var random = RandomNumberGenerator.Create(); client.SharedSecret = new byte[16]; random.GetBytes(client.SharedSecret); // Generate a secure AES key if (packet.ServerId != "-") // Online mode { // Authenticate with minecraft.net if (!client.Session.OnlineMode) { throw new AuthenticationException("Server is in online mode, but client is in offline mode."); } var data = Encoding.ASCII.GetBytes(packet.ServerId) .Concat(client.SharedSecret) .Concat(packet.PublicKey).ToArray(); var hash = Cryptography.JavaHexDigest(data); var webClient = new WebClient(); string result = webClient.DownloadString("http://session.minecraft.net/game/joinserver.jsp?user="******"&sessionId=" + Uri.EscapeUriString(client.Session.SessionId) + "&serverId=" + Uri.EscapeUriString(hash)); if (result != "OK") { // TODO } } var parser = new AsnKeyParser(packet.PublicKey); var key = parser.ParseRSAPublicKey(); // Encrypt shared secret and verification token var crypto = new RSACryptoServiceProvider(); crypto.ImportParameters(key); var encryptedSharedSecret = crypto.Encrypt(client.SharedSecret, false); var encryptedVerification = crypto.Encrypt(packet.VerificationToken, false); var response = new EncryptionKeyResponsePacket(encryptedSharedSecret, encryptedVerification); client.SendPacket(response); client.FlushPackets(); client.NetworkManager.BaseStream = new AesStream(client.NetworkStream, client.SharedSecret); }
public static void EncryptionKeyRequest(MinecraftClient client, IPacket _packet) { var packet = (EncryptionKeyRequestPacket)_packet; var random = RandomNumberGenerator.Create(); client.SharedSecret = new byte[16]; random.GetBytes(client.SharedSecret); // Generate a secure AES key if (packet.ServerId != "-") // Online mode { // Authenticate with minecraft.net if (!client.Session.OnlineMode) throw new AuthenticationException("Server is in online mode, but client is in offline mode."); var data = Encoding.ASCII.GetBytes(packet.ServerId) .Concat(client.SharedSecret) .Concat(packet.PublicKey).ToArray(); var hash = Cryptography.JavaHexDigest(data); var webClient = new WebClient(); string result = webClient.DownloadString("http://session.minecraft.net/game/joinserver.jsp?user="******"&sessionId=" + Uri.EscapeUriString(client.Session.SessionId) + "&serverId=" + Uri.EscapeUriString(hash)); if (result != "OK") { // TODO } } var parser = new AsnKeyParser(packet.PublicKey); var key = parser.ParseRSAPublicKey(); // Encrypt shared secret and verification token var crypto = new RSACryptoServiceProvider(); crypto.ImportParameters(key); var encryptedSharedSecret = crypto.Encrypt(client.SharedSecret, false); var encryptedVerification = crypto.Encrypt(packet.VerificationToken, false); var response = new EncryptionKeyResponsePacket(encryptedSharedSecret, encryptedVerification); client.SendPacket(response); client.FlushPackets(); client.NetworkManager.BaseStream = new AesStream(client.NetworkStream, client.SharedSecret); }