Android APK Decompile Script

android-decompile.sh

#!/bin/bash
APK=$1
# Linux only right now.

if [ ! -d "$HOME/.android-decompile-tools" ]; then

    mkdir "$HOME/.android-decompile-tools"

fi

# Install apktool
# https://ibotpeaches.github.io/Apktool/install/
if [ ! -d "$HOME/.android-decompile-tools/apktool" ]; then

    # make directory for apktool
    mkdir "$HOME/.android-decompile-tools/apktool"
    # Grab wrapper script
    wget "https://raw.githubusercontent.com/iBotPeaches/Apktool/master/scripts/linux/apktool" -O "$HOME/.android-decompile-tools/apktool/apktool"
    # Grab JAR
    wget "https://bitbucket.org/iBotPeaches/apktool/downloads/apktool_2.2.0.jar" -O "$HOME/.android-decompile-tools/apktool/apktool.jar"
    # Make both files executable as per instructions
    chmod +x $HOME/.android-decompile-tools/apktool/*

fi

# Install dex2jar
# https://github.com/pxb1988/dex2jar
if [ ! -d "$HOME/.android-decompile-tools/dex2jar-2.0" ]; then

    # Grab zip release
    wget "https://github.com/pxb1988/dex2jar/releases/download/2.0/dex-tools-2.0.zip" -O "/tmp/dex-tools.zip"
    # Unzip release
    unzip "/tmp/dex-tools.zip" -d "$HOME/.android-decompile-tools"
    # Clean up zip release
    rm "/tmp/dex-tools.zip"
    # Make all sh files executable
    chmod +x $HOME/.android-decompile-tools/dex2jar-2.0/*.sh

fi

# Install JD-CMD
# https://github.com/kwart/jd-cmd
if [ ! -d "$HOME/.android-decompile-tools/jd-cmd" ]; then

    # Make directory
    mkdir "$HOME/.android-decompile-tools/jd-cmd"
    # Get final release
    wget "https://github.com/kwart/jd-cmd/releases/download/jd-cmd-0.9.1.Final/jd-cli-0.9.1.Final-dist.tar.gz" -O "/tmp/jd-cli.tar.gz"
    # untar final release
    tar xzf "/tmp/jd-cli.tar.gz" -C "$HOME/.android-decompile-tools/jd-cmd"
    # rm final release
    rm "/tmp/jd-cli.tar.gz"
fi

if [ -d "$(pwd)/android-decompiled-output" ]; then
    echo "There is already decompiled output in this directory"
    exit 1
fi

# Make output directories
mkdir -p "$(pwd)/android-decompiled-output/dex2jar"
mkdir -p "$(pwd)/android-decompiled-output/jd-cli"

# Run decompilation tools

# Run apktool to grab resources
$HOME/.android-decompile-tools/apktool/apktool d $APK -o "$(pwd)/android-decompiled-output/apktool"
# Run dex2jar to disassemble smali
$HOME/.android-decompile-tools/dex2jar-2.0/d2j-dex2jar.sh -o "$(pwd)/android-decompiled-output/dex2jar/dex2jar-output.jar" $APK
# Run jd-cli to decompile disassembled smali
$HOME/.android-decompile-tools/jd-cmd/jd-cli -od "$(pwd)/android-decompiled-output/jd-cli" "$(pwd)/android-decompiled-output/dex2jar/dex2jar-output.jar"

exit 0