Obfuscating Package Names

[Oghie Ojior]

Is there a way to configure Antenna or ProGuard/Ant to obfuscate package names? I am able to obfuscate class names but not package name with my current configuration. I require the package names to also be obfuscated to include classes from optional packages that contain java and javax in their package names.

Thanks in advance

[lexander Bosco]

ojior how u doing

sorry dat am asking a question instead of an answer
but b4 i ask ur packages that u want to include are they in the lib folder of your application? if they are they shouldbe included in the obfuscated jar file.

ok! i want to actually know how to run the progaurd obfuscator in my J2ME wireless toolkit.
i followed the installation instructions and yet it complains to me whenever i run it to obfuscate my application.
it complains that my application jar-size in the app descriptor is not the same with the un-obfuscated jar size .
i have tried progaurd obfuscator and retroguard.
i cant really tell what to do .
what do you suggest?

[Oghie Ojior]

Hi lexander:

I am using an ant script to compile and run my code against the Progaurd obfuscator. The classes get obfuscated but the package names do not, so I have a situation way java and javax packages remain in the jar I am trying to install. In my ant script the property midp_home points to my J2ME wireless toolkit directory.

Below is my ant script. Hope this helps.

<project name="mobileApp" default="clean" basedir=".">
<!-- set global properties for this build -->
<property name="program_name" value="mobileApp"/>
<property name="package_name" value="mobileApp"/>
<property name="proguard" value="C:/WTK22/bin/proguard.jar"/>
<property name="midp_home" value="C:/WTK22"/>
<property name="midp_lib" value="${midp_home}/lib/midpapi20.jar"/>
<property name="top" value="."/>
<property name="src" value="src"/>
<property name="res" value="res"/>
<property name="build" value="build"/>
<property name="dist" value="dist"/>
<property name="obf" value="obf"/>
<property name="deploy" value="deploy"/>
<!-- Remove Build Directories -->
<target name="clean">
<!-- Delete our the ${build} and ${dist} directory trees -->
<delete dir="${build}"/>
<delete dir="${deploy}"/>
<delete dir="${obf}"/>
</target>
<!-- Create Build Directories -->
<target name="init" depends="clean">
<!-- Create the build directory structure used by compile and dist -->
<tstamp/>
<mkdir dir="${build}"/>
<mkdir dir="${deploy}"/>
<mkdir dir="${obf}"/>
</target>
<!-- Compile Source -->
<target name="compile">
<mkdir dir="${build}/classes"/>
<javac destdir="build/classes" srcdir="src" bootclasspath="${midp_lib}" target="1.1" classpath="C:/IBM/wsappdev51/workspace/dcm_mobile/lib/kxml.jar"/>
</target>
<!-- Preverify classes -->
<target name="preverify">
<mkdir dir="${build}/preverified"/>
<exec executable="${midp_home}/bin/preverify">
<arg line="-classpath ${midp_lib};C:/IBM/wsappdev51/workspace/dcm_mobile/lib/kxml.jar"/>
<arg line="-d ${build}/preverified"/>
<arg line="${build}/classes"/>
</exec>
</target>
<!-- Package Preverifed classes, resources and MANIFEST file -->
<target name="dist">
<mkdir dir="${build}/bin"/>
<unjar src="C:/IBM/wsappdev51/workspace/dcm_mobile/lib/kxml.jar" dest="build/preverified"/>
<jar basedir="${build}/preverified" jarfile="${build}/bin/${program_name}.jar" manifest="MANIFEST.MF">
<fileset dir="${top}/${res}">
<include name="${package_name}/*.png"/>
</fileset>
</jar>
<copy file="${program_name}.jad" tofile="${build}/bin/${program_name}.jad"/>
</target>
<!-- Obfuscate unobfuscated jar file and unjar obfuscated jar to obf area -->
<target name="obfuscate">
<java fork="yes" classname="proguard.ProGuard" classpath="${proguard}">
<arg line="-libraryjars ${midp_lib};C:/IBM/wsappdev51/workspace/dcm_mobile/lib/kxml.jar"/>
<arg line="-injars ${build}/bin/${program_name}.jar"/>
<arg line="-outjar ${obf}/${program_name}.jar"/>
<arg line="-ignorewarnings"/>
<arg line="-keep 'public class * extends javax.microedition.midlet.MIDlet'"/>
</java>
<unjar src="${top}/${obf}/${program_name}.jar" dest="${top}/${obf}/extract"/>
</target>
<!-- Preverify the obfuscated classes in the obf area -->
<target name="preverifyobf">
<mkdir dir="${build}/preverifiedobf"/>
<exec executable="${midp_home}/bin/preverify">
<arg line="-classpath ${midp_lib};C:/IBM/wsappdev51/workspace/dcm_mobile/lib/kxml.jar"/>
<arg line="-d ${build}/preverifiedobf"/>
<arg line="${obf}/extract"/>
</exec>
</target>
<!-- Re-Package (Jar) the obfuscated classes, resources with MANIFEST file -->
<target name="distobf">
<copy file="${build}/bin/${program_name}.jar" todir="${build}/bin/${program_name}-orig.jar"/>
<mkdir dir="${build}/bin"/>
<jar basedir="${build}/preverifiedobf" jarfile="${build}/bin/${program_name}.jar" manifest="MANIFEST.MF">
<fileset dir="${top}/${res}">
<include name="${package_name}/*.png"/>
</fileset>
</jar>
<copy file="${program_name}.jad" tofile="${build}/bin/${program_name}.jad"/>
</target>
<!-- Deploy Final files from /build/bin ( can be either obfuscated or not obfuscated) -->
<target name="deploy">
<copy file="${build}/bin/${program_name}.jad" tofile="${top}/${deploy}/${program_name}.jad"/>
<copy file="${build}/bin/${program_name}.jar" tofile="${top}/${deploy}/${program_name}.jar"/>
</target>
<!-- Run final jar, currently set to /build/bin may want to change to /deploy -->
<target name="run">
<exec executable="${midp_home}/bin/emulator">
<arg line="-Xdescriptor:${build}/bin/${program_name}.jad"/>
</exec>
</target>
<!-- Combine Tasks -->
<target name="all-non" depends="init,compile,preverify,dist"/>
<target name="all" depends="init,compile,preverify,dist,obfuscate,preverifyobf,distobf"/>
</project>
  

[Oghie Ojior]

FYI: I solved my problem by importing my code into NetBean and using its build facilities to compile, pre-verify, obfuscate and package the code.