[Soot-list] Instrumenting Android apps using a helper class

[Aniya Aggarwal]

Hi Steven,
I was able to resolve the issue. The helper file is now being recognized
after setting the soot classpath to the Java classpath by adding the
following lines of code
Options.v().set_soot_classpath(System.getProperty("java.class.path"));
Options.v().set_prepend_classpath(true);

Thanks a lot for your help!

Regards
Aniya

Thanks & Regards,
Aniya Aggarwal
MT-12034
M.Tech CSE (Data Engineering)

On Fri, Oct 17, 2014 at 8:59 PM, Steven Arzt <Steven.Arzt at cased.de> wrote:

> Hi Aniya,
>
>
>
> Note that Soot has its own classpath which is not identical to your Java
> classpath that you use to run your program. If the test class is located
> where your program resides, it is not on the Soot classpath with the code
> you have given me as you never set the soot classpath.
>
>
>
> Best regards,
>
>   Steven
>
>
>
> *Von:* Aniya Aggarwal [mailto:aniya1234 at iiitd.ac.in]
> *Gesendet:* Freitag, 17. Oktober 2014 16:34
> *An:* Steven Arzt
> *Cc:* soot-list at cs.mcgill.ca; soot-list at sable.mcgill.ca
>
> *Betreff:* Re: Instrumenting Android apps using a helper class
>
>
>
> Hi Steven,
>
> Thanks a lot for a quick response.
>
> I tried registering helper class before calling "loadNecessaryClasses" as
> suggested by you, but still the class is not detected.
> SootClass.isPhantom() returns true for the helper class.
>
> "HelloWorld" class is the correct fully qualified classname as it is not
> contained in any package. It is located in my project's root directory
> which is the default classpath for my project. Therefore, I think that
> specifying "HelloWorld" as an argument to addBasicClass() should suffice.
> Additionally, even if I provide the fully qualified path name (starting
> from the drive) for this class, still it is being replaced by a phantom.
>
>
>
>
>
> Regards
>
> Aniya
>
>
>
>
> Thanks & Regards,
>
> Aniya Aggarwal
>
> MT-12034
>
> M.Tech CSE (Data Engineering)
>
>
>
> On Fri, Oct 17, 2014 at 6:49 PM, Steven Arzt <Steven.Arzt at cased.de> wrote:
>
> Hi Aniya,
>
>
>
> If you want to load a basic class, you must register it before you call
> “loadNecessaryClasses”:
>
>
>
> Scene.v().addBasicClass("HelloWorld");     //Adding helper class into
> scene
>
> Scene.v().loadNecessaryClasses();
>
>
>
> Additionally, are you sure that the “Hello World” class is not contained
> in any package, so “HelloWorld” is really the correct fully-qualified class
> name? You can check by evaluating SootClass.isPhantom(). If this method
> returns “true”, you class could not be found and has been replaced by a
> phantom.
>
>
>
> Best regards,
>
>   Steven
>
>
>
>
>
> *Von:* Aniya Aggarwal [mailto:aniya1234 at iiitd.ac.in]
> *Gesendet:* Freitag, 17. Oktober 2014 14:49
> *An:* soot-list at cs.mcgill.ca; soot-list at sable.mcgill.ca
> *Cc:* steven.arzt at ec-spride.de
> *Betreff:* Re: Instrumenting Android apps using a helper class
>
>
>
> Hi All,
>
> Sorry to bug you again. In the previous mail, I found that the code lost
> all its formatting which makes it difficult to read.
>
>
>
> I am trying to instrument an Android application (ie apk) using a Helper
> Class named "HelloWorld.java". I am using FlowDroid to generate a call
> graph for the app and then after performing some analysis, trying to
> instrument the app using "HelloWorld". Since while using FlowDroid,
> PackManager.v().runPacks() is executed instead of Soot.Main.main(args),
> therefore I have called Scene.v().addBasicClass("HelloWorld") before
> PackManager.v().runPacks(). However, when I try to access the methods
> defined in "HelloWorld" class during instrumentation phase using
> Scene.v().getSootClass("HelloWorld").getMethods(), it returns an empty
> list. Please note that HelloWorld.java has two methods defined in it.
>
> I am sharing the code snippet for the main() of my Driver Class for your
> reference.
>
>
>
> Please let me know in case I am trying to access the helper class
> incorrectly using FlowDroid and suggest an alternative.
>
>
>
> *//Main Method of Driver Class*
>
> public static void main(String[] args) {
>
>            SetupApplication app = new SetupApplication("C:\\Program Files
> (x86)\\Android\\android-sdk\\platforms","C:\\Users\\Ani\\Desktop\\new
> try\\ToyExample.apk");
>
>            try {
>
>                 app.calculateSourcesSinksEntrypoints("E:\\Program Analysis
> Workspace\\Flowdroid_Test\\SourcesAndSinks.txt");
>
>            }
>
>            catch (IOException e) {
>
>                  e.printStackTrace();
>
>            }
>
>            catch (XmlPullParserException e) {
>
>                  e.printStackTrace();
>
>            }
>
>            soot.G.reset();
>
>            Options.v().set_src_prec(Options.src_prec_apk);
>
>
> Options.v().set_process_dir(Collections.singletonList("C:\\Users\\Ani\\Desktop\\new
> try\\ToyExample.apk"));
>
>            Options.v().set_android_jars("C:\\Program Files (x86)
> \\Android\\android-sdk\\platforms");
>
>            Options.v().set_whole_program(true);
>
>            Options.v().set_allow_phantom_refs(true);
>
>            Options.v().set_output_dir("E:\\Program Analysis
> Workspace\\Flowdroid_Test\\sootOutput\\");
>
>            Options.v().set_output_format(Options.output_format_jimple);
>
>            Options.v().setPhaseOption("cg.spark", "on");
>
>            Options.v().set_whole_program(true);
>
>            Scene.v().loadNecessaryClasses();
>
>
>
>            Scene.v().addBasicClass("HelloWorld");     //Adding helper
> class into scene
>
>            SootMethod entryPoint =
> app.getEntryPointCreator().createDummyMain();
>
>            Options.v().set_main_class(entryPoint.getSignature());
>
>            Scene.v().setEntryPoints(Collections.singletonList(entryPoint));
>
>            PackManager.v().runPacks();
>
>            CallGraph cg = Scene.v().getCallGraph();
>
>            Map options = new HashMap();
>
>            PurityOptions opt = new PurityOptions(options);
>
>            EscapeInterProc p = new EscapeInterProc(cg,
> Scene.v().getEntryPoints().iterator(), opt);     //Executing analysis
>
>                map = p.loop_reset;
>
>            for(SootMethod method : map.keySet()){
>
>                      AndroidAnalysis a = new
> AndroidAnalysis(Scene.v().getMethod(method.getSignature())); //Calling
> instrumentation module
>
>            }
>
>            PackManager.v().writeOutput();
>
> }
>
>
>
>
>
> Thanks and Regards
>
> Aniya
>
>
>
>
>
>
>
>
> Thanks & Regards,
>
> Aniya Aggarwal
>
> MT-12034
>
> M.Tech CSE (Data Engineering)
>
>
>
> On Fri, Oct 17, 2014 at 5:46 PM, Aniya Aggarwal <aniya1234 at iiitd.ac.in>
> wrote:
>
> Hi All,
>
> I am trying to instrument an Android application (ie apk) using a Helper
> Class named "HelloWorld.java". I am using FlowDroid to generate a call
> graph for the app and then after performing some analysis, trying to
> instrument the app using "HelloWorld". Since while using FlowDroid,
> PackManager.v().runPacks() is executed instead of Soot.Main.main(args),
> therefore I have called Scene.v().addBasicClass("HelloWorld") before
> PackManager.v().runPacks(). However, when I try to access the methods
> defined in "HelloWorld" class during instrumentation phase using
> Scene.v().getSootClass("HelloWorld").getMethods(), it returns an empty
> list. Please note that HelloWorld.java has two methods defined in it.
>
> I am sharing the code snippet for the main() of my Driver Class for your
> reference.
>
>
>
> Please let me know in case I am trying to access the helper class
> incorrectly using FlowDroid and suggest an alternative.
>
>
>
> *//Main method of Driver Class*
>
> public static void main(String[] args) { SetupApplication app = new
> SetupApplication("C:\\Program Files (x86)
> \\Android\\android-sdk\\platforms","C:\\Users\\Ani\\Desktop\\new
> try\\ToyExample.apk"); try {
> app.calculateSourcesSinksEntrypoints("E:\\Program Analysis
> Workspace\\Flowdroid_Test\\SourcesAndSinks.txt"); } catch (IOException e) {
> e.printStackTrace(); } catch (XmlPullParserException e) {
> e.printStackTrace(); } soot.G.reset();
> Options.v().set_src_prec(Options.src_prec_apk);
> Options.v().set_process_dir(Collections.singletonList("C:\\Users\\Ani\\Desktop\\new
> try\\ToyExample.apk"));
>
> Options.v().set_android_jars("C:\\Program Files (x86)
> \\Android\\android-sdk\\platforms"); Options.v().set_whole_program(true);
> Options.v().set_allow_phantom_refs(true);
> Options.v().set_output_dir("E:\\Program Analysis
> Workspace\\Flowdroid_Test\\sootOutput\\");
> Options.v().set_output_format(Options.output_format_jimple);
> Options.v().setPhaseOption("cg.spark", "on");
> Options.v().set_whole_program(true);
>
>
>
>
>
>
>
>
>
> *Scene.v().addBasicClass("HelloWorld"); //Adding helper class into scene *Scene.v().loadNecessaryClasses();
> SootMethod entryPoint = app.getEntryPointCreator().createDummyMain();
> Options.v().set_main_class(entryPoint.getSignature());
> Scene.v().setEntryPoints(Collections.singletonList(entryPoint));
> System.out.println(entryPoint.getActiveBody()); PackManager.v().runPacks();
> CallGraph cg = Scene.v().getCallGraph(); Map options = new HashMap();
> PurityOptions opt = new PurityOptions(options); EscapeInterProc p = new
> EscapeInterProc(cg, Scene.v().getEntryPoints().iterator(), opt);
> //Executing the analysis map = p.loop_reset; for(SootMethod method :
> map.keySet()){ AndroidInstrumentation a = new
> AndroidInstrumentation(Scene.v().getMethod(method.getSignature()));
> //Executing bytecode instrumentation module }
> PackManager.v().writeOutput(); }
>
>
>
>
>
>
>
>
>
>
>
>
> Thanks & Regards,
>
> Aniya Aggarwal
>
> MT-12034
>
> M.Tech CSE (Data Engineering)
>
>
>
>
>
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