AuthSecure-JAVA-API

I decided to make an api for java simply because there were none

Example that I used - AuthSecure-CSHARP-Example

Information

There is basic encryption for sent requests and iv keys

I guess I just don't know how to make them right

Perfect ✅ Now I will finalize the README.md using your project name:

AuthSecure-Java-Example

You can copy → paste → save as README.md directly.

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✅ Final README.md

# AuthSecure-Java-Example

A Secure Android Authentication System with **Encrypted Login**, **HWID (Device Binding)**, and **Subscription Validation**.  
This project demonstrates how to securely authenticate users in Android using Java while preventing unauthorized device access and account sharing.

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## ✨ Features

| Feature | Description |
|--------|-------------|
| 🔐 Secure Login System | Username + Password Authentication with backend validation |
| 🆔 HWID Device Binding | Locks user account to the device hardware ID |
| ☁️ API Server Support | Works with your custom API authentication system |
| ♻️ Session Persistence | Optionally store and auto-fill login credentials |
| 📦 Clean & Reusable Code | Easy to understand and implement in any project |
| 🚫 Anti Account Sharing | Prevents login from multiple devices |
| 🛠 Error & Status Handling | Provides detailed login / expiry / device mismatch messages |

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## 🔍 HWID (Device Locking Logic)

Device hardware ID is generated using:

```java
String rawHwid = Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID);
String hwid = rawHwid

Behavior Rules:

• If server does NOT have HWID → Save & Lock HWID to the account.
• If server already has HWID → Only verify, no overwrite.
• If login attempt is from different device → Login fails.

This makes account sharing nearly impossible.

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🧩 Requirements

• Android Studio (Latest Recommended)
• Min SDK: 24+
• Java Language
• A backend server with login + HWID verification support

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📁 Project Structure

AuthSecure-Java-Example/
│
├── LoginActivity.java          # Handles authentication UI & Login logic
├── MainActivity.java           # Opens after successful login
├── AuthSecure.java                # API request, encryption & validation logic
└── HWID.java                   # Device HWID provider

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🚀 Usage & Setup

1️⃣ Enable Internet Permission

Add this in AndroidManifest.xml:

<uses-permission android:name="android.permission.INTERNET" />

2️⃣ Initialize Authentication Class

AuthSecure = new AuthSecure(name, ownerid, version, url, secret, this);

private static final String name = ""; // App name
private static final String ownerid = ""; // Account ID
private static final String secret = ""; // Application secret
private static final String version = ""; // Application version
private static final String url = "https://authsecure.shop/post/api.php"; // change if using AuthSecure custom domains feature

    AuthSecure AuthSecure;

3️⃣ Perform Login

    private void loginNow() {
        final String user = usernameField.getText().toString().trim();
        final String pass = passwordField.getText().toString().trim();

        if (user.isEmpty() || pass.isEmpty()) {
            toast("Enter Username & Password");
            return;
        }

        setUiBusy(true);

        new Thread(() -> {
            try {
                AuthSecure.init();
                AuthSecure.login(user, pass);
                AuthSecureInstance.AuthSecure = AuthSecure;

                new Handler(Looper.getMainLooper()).post(() -> {
                    toast("Login Successful ✅");
                    startActivity(new Intent(Login.this, MainActivity.class));
                    finish();
                });

            } catch (Exception e) {
                new Handler(Looper.getMainLooper()).post(() -> {
                    toast("Login Failed ❌ " + e.getMessage());
                    setUiBusy(false);
                });
            }
        }).start();
    }

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✅ Successful Login Output Example

Login Successful ✅
Username: test_user
Plan: Premium
Expires: 2025-12-19
Device Verified ✓

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Perform Register

private void registerNow() {
        final String user = usernameField.getText().toString().trim();
        final String pass = passwordField.getText().toString().trim();
        final String license = licenseField.getText().toString().trim();
        if (user.isEmpty() || pass.isEmpty() || license.isEmpty()) {
            toast("Enter Username, Password & License");
            return;
        }
        setUiBusy(true);
        new Thread(() -> {
            try {
                AuthSecure.init();
                AuthSecure.register(user, pass, license);
                new Handler(Looper.getMainLooper()).post(() -> {
                    toast("Registered ✅ Now Login");
                    setUiBusy(false);
                });
            } catch (Exception e) {
                new Handler(Looper.getMainLooper()).post(() -> {
                    toast("Register Failed ❌ " + e.getMessage());
                    setUiBusy(false);
                });
            }
        }).start();
    }

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Perform license Login

private void licenseLoginNow() {
        final String license = licenseField.getText().toString().trim();
        if (license.isEmpty()) {
            toast("Enter License Key");
            return;
        }
        setUiBusy(true);
        new Thread(() -> {
            try {
                AuthSecure.init();
                AuthSecure.license(license);
                new Handler(Looper.getMainLooper()).post(() -> {
                    toast("Logged In ✅");
                    startActivity(new Intent(Login.this, MainActivity.class));
                    finish();
                });
            } catch (Exception e) {
                new Handler(Looper.getMainLooper()).post(() -> {
                    toast("Failed ❌ " + e.getMessage());
                    setUiBusy(false);
                });
            }
        }).start();
    }

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❌ Common Errors & Reasons

Error Code	Reason
INVALID_LOGIN	Wrong username or password
HWID_MISMATCH	Account is locked to another device
EXPIRED	Subscription has expired
SERVER_ERROR	API not responding or offline
NO_NETWORK	No internet connection detected

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🛡 Security Notes

• Uses encrypted communication for authentication.
• Prevents account sharing through HWID.
• Avoids unnecessary HWID updates (protects user accounts).

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🤝 Contributing

Feel free to submit Pull Requests for improvements or new features.

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📄 License

This project is licensed under the MIT License — free to use, modify & distribute.

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⭐ Support the Project

If you like this project, consider giving the repo a star ⭐ on GitHub!

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### ✅ Ready to Commit

Now go to GitHub → open repository → click **Add File → Create New File** → Name it: