flutter_rasp 3.3.0

RASP plugin for Flutter. Detect root, jailbreak, emulators, debuggers, hooks, repackaging, VPN, SSL pinning, and more.

Flutter RASP

A comprehensive RASP (Runtime Application Self-Protection) plugin for Flutter. Protect your app against reverse engineering, tampering, runtime attacks, and man-in-the-middle attacks with zero external SDK dependencies.

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Features

Threat Detection

Threat	Android	iOS	Description
Root / Jailbreak	✅	✅	Compromised OS with full system access. Attackers can bypass app sandboxing, read private data, and inject code
Emulator / Simulator	✅	✅	Virtual environments used to automate attacks, bypass device-bound protections, and analyze app behavior at scale
Debugger	✅	✅	Attached debuggers (JDWP, ptrace) allow stepping through code, modifying variables at runtime, and extracting secrets
Hooks (Frida/Xposed)	✅	✅	Instrumentation frameworks that intercept and modify function calls at runtime, bypassing security checks
Repackaging	✅	✅	Tampered app re-signed with a different certificate. Used to inject malware, remove license checks, or steal data
Trusted Install	✅	✅	Sideloaded apps bypass store review and integrity checks, increasing risk of running modified or malicious builds
VPN	✅	✅	Active VPN or proxy that can intercept, inspect, and modify network traffic between the app and its servers
Developer Mode	✅	❌	Enabled developer options expose debugging interfaces that allow unauthorized access to app internals
ADB Enabled	✅	❌	Android Debug Bridge enabled, allowing unauthorized USB debugging access to app internals and data extraction
Device Passcode	✅	✅	Device without screen lock. Physical access gives unrestricted access to app data and keychain entries
Secure Hardware	✅	✅	Missing hardware-backed keystore (TEE/StrongBox, Secure Enclave). Cryptographic keys can be extracted by software attacks
Obfuscation	✅	❌	Unobfuscated binary with readable class and symbol names, making reverse engineering and vulnerability discovery trivial
Time Spoofing	✅	❌	Manipulated system clock used to bypass time-based logic like token expiration, trial periods, or certificate validity
Location Spoofing	✅	❌	Fake GPS coordinates used to bypass geo-restrictions, cheat in location-based services, or commit region-locked fraud
Multi-Instance	✅	❌	Cloned or dual-app environments that run multiple copies of the app to abuse promotions, bypass rate limits, or impersonate users
Device Binding	✅	✅	Detects device hardware fingerprint changes since first app launch, indicating the app was cloned or migrated to a different device
Screen Capture	✅	✅	Blocks screenshots and screen recording to prevent leaking sensitive UI content like PINs, tokens, or personal data

SSL Certificate Pinning

Feature	Description
PEM Certificate Pinning	Only trusts the .pem certificates you provide — any other connection fails automatically
Compatible with dart:io, Dio, package:http	Works with any HTTP client that accepts a dart:io HttpClient

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Getting Started

dependencies:
  flutter_rasp: ^3.3.0

Platform	Minimum Version
Android	API 24 (Android 7.0)
iOS	13.0

No additional permissions required. Zero external SDK dependencies.

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Usage

Initialization

import 'package:flutter_rasp/flutter_rasp.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  await FlutterRasp.instance.initialize(
    config: const RaspConfig(
      policy: ThreatPolicy.high,
      monitoringInterval: Duration(seconds: 10),
      androidConfig: AndroidRaspConfig(
        signingCertHashes: ['AKoRuyLMM91E7lX/Zqp3u4jMmd0A7hH/Iqozu0TMVd0='],
      ),
      iosConfig: IosRaspConfig(
        teamId: 'A1B2C3D4E5',
        bundleIds: ['com.yourcompany.yourapp'],
      ),
    ),
    onThreatDetected: (threats) => debugPrint('$threats'),
    threatCallback: ThreatCallback(
      onRoot: () => navigateToBlockedScreen(),
      onVpn: () => showVpnWarning(),
    ),
  );

  runApp(const MyApp());
}

Note: At least one of onThreatDetected or threatCallback must be provided.

Platform Configuration

Android — signingCertHashes expects your signing certificate fingerprint in Base64 format.

1. Get the SHA-256 fingerprint from keytool, Google Play Console (App signing section), or Firebase Console. You will end up with a hex string like this:

   A1:2B:3C:4D:5E:6F:70:81:92:A3:B4:C5:D6:E7:F8:09:1A:2B:3C:4D:5E:6F:70:81:92:A3:B4:C5:D6:E7:F8:09
   

2. Convert it to Base64. You can get it directly from terminal:

   keytool -exportcert -alias {ALIAS} -keystore {KEYSTORE_FILE} -storepass {STORE_PASSWORD} \
     | openssl dgst -sha256 -binary | base64
   

   Or use the built-in utility:

   final base64Hash = hashConverter.fromSha256toBase64(
     'A1:2B:3C:4D:5E:6F:70:81:92:A3:B4:C5:D6:E7:F8:09:1A:2B:3C:4D:5E:6F:70:81:92:A3:B4:C5:D6:E7:F8:09',
   );
   

iOS — Find your Team ID at Apple Developer Account → Membership Details.

SSL Certificate Pinning

Download your server's certificate:

openssl s_client -connect your-api.com:443 -servername your-api.com \
  2>/dev/null | openssl x509 > assets/certs/your_server.pem

Register it in pubspec.yaml:

flutter:
  assets:
    - assets/certs/

const config = SslPinningConfig(
  certificateAssetPaths: ['assets/certs/your_server.pem'],
);

final client = await SslPinningClient.createHttpClient(config);

Works with any HTTP client that accepts a dart:io HttpClient:

// dart:io
final request = await client.getUrl(Uri.parse('https://your-api.com/endpoint'));

// Dio
final dio = Dio()
  ..httpClientAdapter = IOHttpClientAdapter(
    createHttpClient: () => client,
  );

// package:http
final httpClient = IOClient(client);

You can also use SslPinningClient.createContext(config) to get a SecurityContext directly if you need more control.

Important: The pinned certificate is bundled in your app assets. When your server renews or rotates its certificate, you must publish an app update with the new .pem file — otherwise connections will fail. Plan certificate renewals alongside app releases.

See the example app for a complete working implementation.

Supported Stores / Distribution Methods

The supportedStores parameter in AndroidRaspConfig controls which install sources are considered trusted.

Store / Distribution method	Package name	Notes
App Store (iOS)		Included by default, no action needed
TestFlight (iOS)		Included by default, no action needed
Google Play	com.android.vending	Included by default, no action needed
Huawei AppGallery	com.huawei.appmarket	Included by default, no action needed
Amazon Appstore	com.amazon.venezia	Included by default, no action needed
Samsung Galaxy Store	com.sec.android.app.samsungapps	Included by default, no action needed
Firebase App Distribution	dev.firebase.appdistribution
Vivo App Store	com.vivo.appstore	Common on Vivo devices
HeyTap	com.heytap.market	Common on Realme and Oppo devices
Oppo App Market	com.oppo.market	Common on Oppo devices
GetApps	com.xiaomi.mipicks	Common on Xiaomi, Redmi and POCO devices

To support additional stores, add their package names:

AndroidRaspConfig(
  signingCertHashes: ['...'],
  supportedStores: [
    ...AndroidRaspConfig().supportedStores,
    'dev.firebase.appdistribution',  // Firebase App Distribution
    'com.vivo.appstore',             // Vivo App Store
    'com.heytap.market',             // HeyTap (Realme, Oppo)
    'com.oppo.market',               // Oppo App Market
    'com.xiaomi.mipicks',            // GetApps (Xiaomi, Redmi, POCO)
  ],
);

Threat Policies

Policies control which threats terminate the app at the native level before Dart code can react.

Policy	Exit Threats
ThreatPolicy.none	None (report only)
ThreatPolicy.low	repackaging, trustedInstall
ThreatPolicy.medium	root, hook, repackaging, trustedInstall, obfuscationIssues, multiInstance
ThreatPolicy.high	root, hook, repackaging, trustedInstall, debug, devicePasscode, obfuscationIssues, multiInstance, secureHardwareNotAvailable, locationSpoofing, adbEnabled, deviceBinding

const policy = ThreatPolicy(
  exitThreats: {Threat.root, Threat.repackaging, Threat.vpn},
);

Tip: Use ThreatPolicy.none during development.

Obfuscation Detection (Android)

flutter run → detected (debug has no R8) flutter run --release → not detected (R8 obfuscates classes)

Enable R8 in android/app/build.gradle.kts:

buildTypes {
    release {
        isMinifyEnabled = true
        isShrinkResources = true
        proguardFiles(
            getDefaultProguardFile("proguard-android-optimize.txt"),
            "proguard-rules.pro"
        )
    }
}

Note: Flutter's --obfuscate flag only covers Dart code. isMinifyEnabled = true is required to obfuscate the native Android layer.

Scans & Individual Checks

final result = await FlutterRasp.instance.scanAll();
if (result.isCompromised) {
  debugPrint('Detected: ${result.detectedThreats}');
}

Available: isRooted(), isEmulator(), isDebugged(), isHooked(), isRepackaged(), isUntrustedInstall(), isVpnConnected(), isDeveloperMode(), isAdbEnabled(), isDevicePasscodeDisabled(), isSecureHardwareUnavailable(), hasObfuscationIssues(), isTimeSpoofed(), isLocationSpoofed(), isMultiInstance(), isDeviceBindingChanged().

Screen Capture Protection

await FlutterRasp.instance.blockScreenCapture(true);

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Architecture

Flutter App
    |
FlutterRasp (Singleton)             SslPinningClient (Independent)
    |                                    |
FlutterRaspPlatform (Interface)     SecurityContext (withTrustedRoots: false)
    |
MethodChannelFlutterRasp
    |--- MethodChannel (commands/checks)
    |--- EventChannel  (threat stream)

    Android (Kotlin)              iOS (Swift)
    -----------------             -----------------
    DetectorRegistry              DetectorRegistry
    |-- RootDetector              |-- JailbreakDetector
    |-- EmulatorDetector          |-- SimulatorDetector
    |-- DebugDetector             |-- DebugDetector
    |-- HookDetector              |-- HookDetector
    |-- RepackagingDetector       |-- RepackagingDetector
    |-- TrustedInstallDetector    |-- TrustedInstallDetector
    |-- VpnDetector               |-- VpnDetector
    |-- DeveloperModeDetector     |-- DevicePasscodeDetector
    |-- AdbEnabledDetector        |-- SecureHardwareDetector
    |-- DevicePasscodeDetector    |-- DeviceBindingDetector
    |-- SecureHardwareDetector    ScreenCaptureManager
    |-- ObfuscationDetector
    |-- TimeSpoofingDetector
    |-- LocationSpoofingDetector
    |-- MultiInstanceDetector
    |-- DeviceBindingDetector
    ScreenCaptureManager

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Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Adding a New Detector

1. Create a detector class implementing ThreatDetector (Android) or ThreatDetectable (iOS)
2. Add it to the DetectorRegistry list
3. Add the corresponding Threat enum value in Dart

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License

This project is licensed under the MIT License - see the LICENSE file for details.