unidbg-补文件环境（二）

通过signature标识来确定文件标识；
补环境sd卡及根目录

package com.dta.lesson34;import com.GitHub.unidbg.AndroidEmulator;import com.github.unidbg.Module;import com.github.unidbg.linux.android.AndroidEmulatorBuilder;import com.github.unidbg.linux.android.AndroidResolver;import com.github.unidbg.linux.android.dvm.*;import com.github.unidbg.memory.Memory;import java.io.File;import java.util.Arrays;public class MainActivity2 extends AbstractJni {    private final AndroidEmulator emulator;    private final VM vm;    private final Memory memory;    private final Module module;    private final DvmObject<?> obj;    public MainActivity2(){        emulator = AndroidEmulatorBuilder                .for32Bit()                //.setRootDir(new File("target/rootfs/default"))                //.addBackendFactory(new DynarmicFactory(true))                .build();        memory = emulator.getMemory();        memory.setLibraryResolver(new AndroidResolver(23));        vm = emulator.createDalvikVM(new File("unidbg-android/src/test/java/com/dta/lesson34/DogLite.apk"));        vm.setVerbose(true);        vm.setJni(this);        DalvikModule dalvikModule = vm.loadLibrary(new File("unidbg-android/src/test/java/com/dta/lesson34/libdoglite.so"), false);        module = dalvikModule.getModule();        vm.callJNI_OnLoad(emulator,module);        obj = vm.resolveClass("com/example/doglite/MainActivity").newObject(null);    }    public static void main(String[] args) {        long start = System.currentTimeMillis();        MainActivity2 mainActivity = new MainActivity2();        System.out.println("load the vm "+( System.currentTimeMillis() - start )+ "ms");//        mainActivity.SysInfo();//        mainActivity.getAppFilesDir();        mainActivity.base64result();    }    //public native void base64result(String str);    private void base64result() {        String input = "12345";        obj.callJniMethod(emulator,"base64result(Ljava/lang/String;)V",input);    }    private void getAppFilesDir() {        obj.callJniMethod(emulator,"getAppFilesDir()V");    }    private void SysInfo() {        obj.callJniMethod(emulator,"SysInfo()V");    }    @Override    public DvmObject<?> callObjectMethodV(BaseVM vm, DvmObject<?> dvmObject, String signature, VaList vaList) {        if (signature.equals("android/app/ActivityThread->getApplication()Landroid/app/Application;")){            return vm.resolveClass("android/app/Application").newObject(null);        }        if (signature.equals("java/io/File->getAbsolutePath()Ljava/lang/String;")){            String tag = dvmObject.getValue().toString();            if (tag.equals("android/os/Environment->getExternalStorageDirectory()Ljava/io/File;")){                return new StrinGobject(vm,"/sdcard/");            }else if (tag.equals("android/os/Environment->getStorageDirectory()Ljava/io/File;")){                return new StringObject(vm, "/");            }        }        return super.callObjectMethodV(vm, dvmObject, signature, vaList);    }    @Override    public DvmObject<?> callStaticObjectMethodV(BaseVM vm, DvmClass dvmClass, String signature, VaList vaList) {        if (signature.equals("android/provider/Settings$Secure->getString(Landroid/content/ContentResolver;Ljava/lang/String;)Ljava/lang/String;")){            String arg1 = vaList.getObjectArg(1).getValue().toString();            System.err.println("getString() arg1:"+arg1);            return new StringObject(vm, "123456789");        }        if (signature.equals("android/os/Environment->getExternalStorageDirectory()Ljava/io/File;")){            return vm.resolveClass("java/io/File").newObject(signature);        }        if (signature.equals("android/os/Environment->getStorageDirectory()Ljava/io/File;")){            return vm.resolveClass("java/io/File").newObject(signature);        }        if (signature.equals("android/util/Base64->encodeToString([BI)Ljava/lang/String;")){            byte[] input = (byte[]) vaList.getObjectArg(0).getValue();            int flag = vaList.getIntArg(1);            String s = Base64.encodeToString(input, flag);            return new StringObject(vm, s);        }        return super.callStaticObjectMethodV(vm, dvmClass, signature, vaList);    }}

来源地址：https://blog.csdn.net/weixin_38927522/article/details/127909506