Secure your codes by enabling proguard in android app

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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. This is my first project in Android Studio, and the code of my apps are not obfuscated. Im using this configuration in build. You're probably not actually signing the release build of the APK via the signing wizard. You can either build the release APK from the command line with the command:.

You can configure your build. It can be at module level or the project level. The configuration shown is for debug level but you can write you own build flavors like shown below inside buildTypes:.

Better to have your debug with minifyEnabled false and productionbuild and other builds as minifyEnabled true. You can change the name of your file as you want. After configuration use one of the three options available to generate your build as per the buildType. Try renaming your 'proguard-rules. The getDefaultProguardFile So remove this as well, so that here the gradle file reads:. The other answers here are great references on using proguard. However, I haven't seen an issue discussed that I ran into that was a mind bender.

After you generate a signed release. Hence, I spent hours decompiling the wrong apk wondering why my proguard changes were having no affect. Hope this helps someone! Learn more. How to use the ProGuard in Android Studio? Ask Question. Asked 6 years, 3 months ago. Active 9 months ago. Viewed k times. Felipe Porge Xavier. Felipe Porge Xavier Felipe Porge Xavier 1, 3 3 gold badges 15 15 silver badges 26 26 bronze badges. How to check whether the app is obfuscated or not? Active Oldest Votes.

Secure your codes by enabling Proguard in Android App

Scott Barta Scott Barta I have tested changing the debug to runProguard true and works perfectly. Now I read your reply, and works!!!! Great man!Nowadays it is quite easy to reverse engineer and android application.

secure your codes by enabling proguard in android app

A beginner level android developer or hacker or some bad guys can reuse your code by decompiling your. So there is a need to optimize your code. To prevent someone to read your code you can use a tool that will make your codes harder to read. Enabling proguard in android studio is really easy. You just have to make minifyEnabled true from build. Below is the process how to enable default ProGuard in Android Studio. You may also enable shrinkResources and useProguard true for reducing your apk size by removing unused codes and resources.

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Here i configured my files both for release and debug mode. You may disabled proguard for debug mode. In that case just make minifyEnabled false, shrinkResources false, useProguard false in debug. Otherwise your log will full with a lots of errors and it will be very pathetic. Maximum third party library provide their proguard-rules in their repository. If you failed to find them, you may search in google or whatever.

The files are:.

Configure the base module

You must have to upload it at different places like PlayStore Console for seeing the original stack-trace of the crashes. But if we obfuscate our codes with proguard, you know class name, method name will be changed. So what should we do?

There is a easy solution. There are three ways to access the APK Analyzer when a project is open:.And if you try to edit some of the extracted files our app. The source code of your application, readable for anyone that knows how to open an APK with a zip utility.

Although our code is minified for production not made by cordova but usthe code still visible, it can be pretty printed and therefore readable.

This ain't so good obviously as your code may expose security flaws if there's any in features like the login into your app, payments process etc. If somebody really wants to hack your app, it can be hacked, sooner or later unless your app communicates a lot with the server and most of the functionalities aren't on the device.

In this article you will learn how to protect or at least increase the protection level of the source code of your application in Cordova. It can be used on any cordova project even if it uses Crosswalk and although this tutorial is meant to be used only in Android, the plugin itself supports iOS platforms too. Install the plugin using the following command in your terminal once you're located in your project folder :.

Once the plugin is installed it will start working automatically and on every build, it will encrypt the files. As expected, the files will be decrypted everytime your application inits on the installed device. As previously mentioned, the files are encrypted and there's no way to decrypt them with Javascript.

In case you need a file not to be encrypted, you can customize which files you want to encrypt with a custom regular expression. However you will need to specify this in a file of the plugin. Start by opening the plugin.

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By default the plugin includes the following regex that encrypts all css,htm,html and js files inside the www directory:.

Simply customize the regex to specify which files will be encrypted e. Now after the installation of the plugin and optional customization of files to encrypt you can verify if the plugin is working or not.

Repeat the same process mentioned at the beginning of the article. As you can see, the structure of the files remains the same. Finally, edit any of the files as long it isn't excluded from the encryption with a code editor and you will see that the content of the file is encrypted:. It seems unreadable now, isn't?.Disclaimer: This article was written solely for entertainment and educational purposes.

Everything that I have described here you do at your own risk. The same approach can be used for other logging libraries with minor changes.

secure your codes by enabling proguard in android app

In order to enable logging we need to decompile the APK, then replace the specific code which is responsible for turning off logs and compile it back. Actually you can! Usually anyone who calls himself an Android developer should disable logging before releasing the application.

So usually logs are disabled. It is also obfuscated and optimised with all unreachable code removed and the majority of the code fields replaced with some unreadable names — like aba1b1 and so on.

Sometimes some classes can also be moved into different packages and split into different parts. And, of course, release build is signed with a developer release certificate. Normally, there are three ways:. Dexguard is quite hard to get and requires some advanced skills. But first, we need to understand what we have to do. DEBUG flag and either turn logs on or off. And this is how we use it for logging:. They are still there! We just plant different trees and through those trees we send our logs to the Firebase or your own logging system.

Moreover, you get them in normal, not-obfuscated view. But it is a completely different story. OK, so what does it have to do with our task? This is exactly the thing which we need to look at!That is, the module that applies the app plugin below to its build. In addition to providing the core functionality for your app, the base module also provides many of the build configurations and manifest entries that affect your entire app project. Other important aspects of the base module are described below.

So, if you are considering adding dynamic feature modules to your app project, there are some aspects to the base APK's manifest that you should keep in mind:. Because the base APK is always installed first, it should provide the main entry point for your app. That is, it should declare an activity with the following intent filter:.

When downloading dynamic feature modules on demand, devices running Android 6. To learn more, read Access code and resources from downloaded modules. Similarly, on devices running Android 6. So, if you require certain permissions or services as soon as a dynamic feature module is downloaded, consider including them in the manifest of your base module. Android App Bundles include support for uncompressed native libraries.

When building your app using Android Gradle plugin 3.

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By default, when you build an app bundle, it supports generating configuration APKs for each set of language resources, screen density resources, and ABI libraries. Using the android. Instead, you manage only one version code in the base module of your app, as shown below:.

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After you upload your app bundle, Google Play uses the version code in your base module to assign the same version code to all the APKs it generates from that bundle. That is, when a device downloads and installs your app, all split APKs for that app share the same version code.

Demo decompile & proguard

When you upload that app bundle to Google Play, it generates a new set of APKs based on the version code the base module specifies. Subsequently, when users update your app, Google Play serves them updated versions of all APKs currently installed on the device. That is, all installed APKs are updated to the new version code.

One exception to the update flow described above is when an installed app requires additional configuration APKs.

secure your codes by enabling proguard in android app

Consider a user who changes their default system language after already downloading your app. If your app supports that language, the device requests and downloads additional configuration APKs for those language resources from Google Play. However, this type of update to your app does not change its version code, so the device downloads and installs only the configuration APKs that it requires. Content and code samples on this page are subject to the licenses described in the Content License.

App Basics.You can enable ProGuard in your Android Gradle build process, by enabling minification in the build. You then need to make sure that you use ProGuard instead of R8, in the gradle. Alternatively, you can enable ProGuard in the Android Gradle build process using ProGuard's own tuned plugin, by changing the build.

Each build type that should be processed by ProGuard needs to have a set of configuration files, as shown below:. They apply optimized minimal settings for the Android platform. Your own configuration files then only need to contain project-specific settings. The ProGuard plugin supports various settings that can be added to the build.

How to enable logging on any released Android app

ProGuard can backport Java 8 language features to Dalvik and to older versions of Java, so you can use them in applications and libraries that work on all versions of Android. Additions to the Java runtime library like the stream API can not be backported without additional runtime dependencies; see the next section.

In order to enable Java 8 language support, a Java 8 Compiler must be available when running gradle, i. You need to configure the source and target compatibility settings in your build. If you want to target a minimum API level less than 19, you should add the following configuration to your proguard-project.

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Furthermore, you need to add the streamsupport library as dependency to your project, e. If you use the Java 8 stream API in your project, but ProGuard can not backport to the included streamsupport library e. Note: ProGuard currently only supports the core streamsupport library. Additional modules cfuture, atomic, flow, literal are not yet backported. Please contact Guardsquare if you want to use them as well.

The java. ProGuard can backport the use of these methods can be backported, but in case you implement these interfaces yourself which would be unusualthe resulting class can not be fully backported due to missing default methods. This includes the following interfaces:. Furthermore, you need to add the threetenbp library as dependency to your project, e.

It is highly recommended to use the threetenabp library from Jake Wharton instead, which is just as a wrapper around the threetenbp library and provides an efficient way to initialize the timezone database:. DexGuard is a state-of-the-art security solution for the protection of your Android applications and SDKs. Jump to navigation. Menu Close Back. Contact us Search Login.

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secure your codes by enabling proguard in android app

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