Method and system for realizing VMP protection at Android end

Abstract

The invention provides a method for realizing VMP protection at Android end, which comprises the following steps of S1, developing an application function by using a JAVA function, compiling the JAVA function or a JNI function to generate a. Cpp format file of a so file, and naming the. Cpp format file as pro.cpp; s2, defining a function A, and copying CodeItem of the function A; s3, deleting all codes of the function A, and defining a JNI function with the same name as the function A under the category of the function A; s4, copying the definition of CodeItem in the source code of the Android system to the cpp file; s5, defining a function A and an interpreter function in the cpp file, and calling the interpreter function in the function A; step S6, converting the byte array of the CodeItem into the CodeItem defined in the cpp file in an interpreter function, and then defining a virtual register; step S7, taking out the instructions in the CodeItem one by one; step S8, compiling the APK through a compiler. According to the invention, the VMP protection of the APP can be completed at the start time of the APP.

Description

technical field [0001] The invention relates to the technical field of Android application reinforcement, in particular to a method and system for implementing VMP protection on Android. Background technique [0002] On the Android side, the security of games and apps is becoming more and more important. The hardening technology is constantly iterating, from the overall hardening of the first generation of DEX, the second generation of function extraction to the third generation of the introduction of VMP to harden the application (the code part protected by this software is executed on the virtual machine, which makes the protected program difficult to be analyzed. and cracking. The use of disassembler and MAP files allows you to quickly select the code that needs to be protected to avoid cracking). The purpose of strengthening games and applications is to increase the difficulty of reverse analysis and protect games and application data from being modified or running logic...

AI Technical Summary

Problems solved by technology

[0004] 1. The source APK is unprotected and uploaded to other platforms, the security of the APK cannot be guaranteed, and the APK code may leak, resulting in security issues

[0005] 2. Uploading to other hardening platforms requires spending money for hardening. It may often cost tens of thousands of a year for an APP. If the company has hundreds of apps that need to be hardened, then the money spent on VMP hardening every year will be a lot, which is not cost-effective.

[0006] 3. If other platforms are used for VMP hardening, the application compatibility and performance after hardening cannot be guaranteed, and the hardened APK may not be installed or run on certain versions of Android.

[0007] 4. Usually, some functions and methods related to communication with the server or data transmission in the source APK are written using JNI, which is troublesome to implement

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