[Android Application Development] Android APK decompilation obfuscation, decompilation, and androidapk

[Android Application Development] Android APK decompilation obfuscation, decompilation, and androidapk

Decompilation Tool: Summarize the linux, windows, and mac versions, and put them on CSDN for download;

--CSDN:Http://download.csdn.net/detail/han1202012/8221787

Octopus @ octopus :~ /Decompiler $ tree-L 2. ├ ── linux │ ── apktool │ ── dex2jar-0.0.9.15 │ jd-gui ── mac │ ── apktool │ ── dex2jar-0.0.9.15 │ ── jd-gui-0.3.5.osx.i686.dmg ── windows │ ── apkTool │ ├ ── dex2jar-0.0.9.15 │ ── jd-gui.exe └ ── source code ── apktool-source.zip10 directories, 4 files

1. decompile to Java source code

1. Tool Introduction

Dex2jar Introduction: Convert the. dex or. class suffix file to a. jar file;

--Latest Version: The latest version 0.0.9.15;

--Official Address (Wall flip required):Http://code.google.com/p/dex2jar/;

--(Wall flip required):Http://code.google.com/p/dex2jar/downloads/list;

Jd-gui Overview: Use this tool to view the java code in. jar;

--Official Website address:Http://jd.benow.ca/;

2. decompilation Process

(1) decompilation of Ubuntu

A. Obtain the. dex suffix file.: Modify the suffix of the apk file to obtain the class. dex file;

B. Execute Decompilation: Copy classes. dex to the dex2jar directory and run./D2j-dex2jar.sh classes. dexCommand;

--Execution result:

octopus@octopus:~/decompiler/linux/dex2jar-0.0.9.15$ ./d2j-dex2jar.sh classes.dex dex2jar classes.dex -> classes-dex2jar.jar

C. view source code in jd-gui: Drag the classes-dex2jar.jar file into jd-gui to view the source code;

3. obfuscation code

Note: If the signature file is not used for packaging, the files directly copied from eclipse cannot be confused;

(1) configuration obfuscation File

Edit progard. cfg:

-- File Content:

-Optimizationpasses 5-dontusemixedcaseclassnames-dontskipnonpubliclibraryclasses-dontpreverify-verbose-optimizations! Code/simplification/arithmetic ,! Field /*,! Class/merging/* # classes related to components are not obfuscated. keep-keep public class * extends android. app. activity-keep public class * extends android. app. application-keep public class * extends android. app. service-keep public class * extends android. content. broadcastReceiver-keep public class * extends android. content. contentProvider-keep public class * extends android. app. backup. backupAgentHelper-keep public class * extends android. preference. preference-keep public class com. android. vending. licensing. ILicensingService # native methods in all classes are not Obfuscated-keepclasseswithmembernames class * {native <methods> ;} # Do not confuse the method names of the specified methods of all classes-keepclasseswithmembers class * {public <init> (android. content. context, android. util. attributeSet) ;}# do not confuse the method names of the specified methods of all classes-keepclasseswithmembers class * {public <init> (android. content. context, android. util. attributeSet, int) ;}# reserve the Activity subclass-keepclassmembers class * extends android. app. activity {public void * (android. view. view) ;}# do not confuse the method names of the specified methods under all classes of the enum type-keepclassmembers enum * {public static ** [] values (); public static ** valueOf (java. lang. string) ;}# classes that implement the Parcelable serialization interface are not Obfuscated-keep class * implements android. OS. parcelable {public static final android. OS. parcelable $ Creator *;}

--Project. properties configuration confusion File:

target=android-19proguard.config=proguard.cfg

(2) package the apk file (create a new keystore)

A. Set the packaging project: Right-click the project and choose Android Tools --> Export Signed Application Package. The following dialog box is displayed. Select the program to be packaged, set it, and click Next;

B. Create a keystore: Select Create new keystore, select a file, and set the keystore user name and password;

--Location: Keystore file;

-- Password: Password;

--Confirm: Confirm the password and re-enter the password;

C. Enter the keystore details:

--Alias: Alias;

--Password: Alias password;

--Confirm: Confirm the password;

--Validity (years): Validity period. It is recommended to be 25 years;

--First and Last Name: Developer name;

The following parameters are optional.

--Orgnizational Unit: Organization name;

--Orgnization: Organization;

--City or Location: City;

--State or Provience: Province or state;

--Country Code: Country;

D. Select and package the apk File: Click finish to complete packaging;

(3) package the apk file (use the existing keystore file)

A. Select the packaged Project: Right-click the project and choose Android Tools --> Export Signed Application Package;

B. Select the signature file.: Enter the signature file Password;

C. Enter the alias Password:

D. Package apk: select the apk file to package:

(4) Verify the obfuscation Effect

Decompilation: Change the suffix of the apk file to. zip, and then extract the classes. dex file to the dex2jar root directory and execute the./d2j-dex2jar.sh classes. dex command;

octopus@octopus:~/decompiler/linux/dex2jar-0.0.9.15$ ./d2j-dex2jar.sh classes.dex dex2jar classes.dex -> classes-dex2jar.jar

View Java code in jd-gui:

Ii. decompilation of Apktools

1. Introduction to Apktools

Apktools Overview:

--Latest Version: 2.0.0;

--Official website (Wall flip required):Https://code.google.com/p/android-apktool/;

--New Version:Https://bitbucket.org/iBotPeaches/apktool/downloads;

--Old Version (Wall flip required):Https://code.google.com/p/android-apktool/downloads/list;

Files to be downloaded:

--Apktool jar package: Apktool1.5.2.tar.bz2

--Apktool Boot Tool (Linux): Apktool-install-linux-r05-ibot.tar.bz2

--Apktool Boot Tool (mac): Apktool-install-macosx-r05-ibot.tar.bz2

--Apktool Boot Tool (wondows): Apktool-install-windows-r05-ibot.tar.bz2

2. Decompilation

Put the downloaded file into a file:

Decompilation: Put the apk file in the directory above and execute the command./apktool d WheelView.apk;

-- Decompilation process:

octopus@octopus:~/decompiler/linux/apktool$ ./apktool d WheelView.apk I: Baksmaling...I: Loading resource table...I: Loaded.I: Decoding AndroidManifest.xml with resources...I: Loading resource table from file: /home/octopus/apktool/framework/1.apkI: Loaded.I: Regular manifest package...I: Decoding file-resources...I: Decoding values */* XMLs...I: Done.I: Copying assets and libs...octopus@octopus:~/decompiler/linux/apktool$ lsaapt  apktool  apktool.jar  WheelView  WheelView.apk

-- Decompilation result: The Decompilation results are all in the WheelView directory. res contains related resource files, while smali contains smali assembly files;

3. recompile

Recompile Command Format:./Apktool B apk source directory apk file name;

--Execute Command:./Apktool B WheelView WheelView1.apk, which can generate the WheelView1.apk file;

octopus@octopus:~/decompiler/linux/apktool$ lsaapt  apktool  apktool.jar  WheelView  WheelView.apkoctopus@octopus:~/decompiler/linux/apktool$ ./apktool b WheelView WheelView1.apkI: Checking whether sources has changed...I: Smaling...I: Checking whether resources has changed...I: Building resources...I: Building apk file...octopus@octopus:~/decompiler/linux/apktool$ lsaapt  apktool  apktool.jar  WheelView  WheelView1.apk  WheelView.apk