☕ Java Code Examples

import java.io.*;
import java.net.NetworkInterface;
import java.net.InetAddress;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.URI;
import java.util.Enumeration;
import com.google.gson.Gson;
import com.google.gson.JsonObject;

public class TKIAuth {
    private static final String API_KEY = "your-api-key-here";
    private static final String API_URL = "http://your-domain.com/api/license/auth";
    private static final String PRODUCT = "MyJavaApp";
    private static final String VERSION = "1.0.0";
    
    public static class AuthRequest {
        public Data data;
        
        public static class Data {
            public String product;
            public String version;
            public String licensekey;
            public String ip;
            public String hwid;
        }
    }
    
    public static class AuthResponse {
        public String status_overview;
        public String status_msg;
        public String discord_username;
        public String discord_tag;
        public String expire_date;
        public boolean staff_license;
        public String message;
    }
    
    private static String getHWID() {
        try {
            // Get MAC address as HWID
            Enumeration<NetworkInterface> networks = NetworkInterface.getNetworkInterfaces();
            while (networks.hasMoreElements()) {
                NetworkInterface network = networks.nextElement();
                byte[] mac = network.getHardwareAddress();
                
                if (mac != null && mac.length > 0) {
                    StringBuilder sb = new StringBuilder();
                    for (int i = 0; i < mac.length; i++) {
                        sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : ""));
                    }
                    return "JAVA-" + sb.toString();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        // Fallback HWID
        return "JAVA-FALLBACK-" + System.currentTimeMillis() % 1000000;
    }
    
    private static String getLocalIP() {
        try {
            return InetAddress.getLocalHost().getHostAddress();
        } catch (Exception e) {
            return "127.0.0.1";
        }
    }
    
    public static boolean authenticate(String licenseKey) {
        try {
            HttpClient client = HttpClient.newHttpClient();
            Gson gson = new Gson();
            
            // Prepare request data
            AuthRequest.Data data = new AuthRequest.Data();
            data.product = PRODUCT;
            data.version = VERSION;
            data.licensekey = licenseKey;
            data.ip = getLocalIP();
            data.hwid = getHWID();
            
            AuthRequest request = new AuthRequest();
            request.data = data;
            
            String jsonBody = gson.toJson(request);
            
            HttpRequest httpRequest = HttpRequest.newBuilder()
                .uri(URI.create(API_URL))
                .header("Content-Type", "application/json")
                .header("Authorization", API_KEY)
                .POST(HttpRequest.BodyPublishers.ofString(jsonBody))
                .build();
            
            HttpResponse<String> response = client.send(httpRequest, 
                HttpResponse.BodyHandlers.ofString());
            
            if (response.statusCode() == 200) {
                AuthResponse authResponse = gson.fromJson(response.body(), AuthResponse.class);
                
                if ("success".equals(authResponse.status_overview)) {
                    System.out.println("✓ License authenticated!");
                    System.out.println("User: " + authResponse.discord_username);
                    System.out.println("Expires: " + authResponse.expire_date);
                    System.out.println("Staff License: " + authResponse.staff_license);
                    return true;
                } else {
                    System.out.println("✗ Authentication failed: " + authResponse.message);
                }
            } else {
                System.out.println("✗ HTTP Error: " + response.statusCode());
            }
            
        } catch (Exception e) {
            System.out.println("✗ Error: " + e.getMessage());
            e.printStackTrace();
        }
        
        return false;
    }
    
    public static void main(String[] args) {
        try (BufferedReader reader = new BufferedReader(new InputStreamReader(System.in))) {
            System.out.print("Enter license key: ");
            String licenseKey = reader.readLine();
            
            if (authenticate(licenseKey)) {
                System.out.println("Starting application...");
                // Your application logic here
            } else {
                System.out.println("Authentication failed!");
                System.exit(1);
            }
            
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Dependencies (Maven)

<dependencies>
    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.10.1</version>
    </dependency>
</dependencies>

Compilation

javac -cp ".:gson-2.10.1.jar" TKIAuth.java
java -cp ".:gson-2.10.1.jar" TKIAuth