unidbg-补环境访问文件及目录

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1.可以采用重定向
2.采用虚拟目录

前两个文件不用补

package com.file;

import com.github.unidbg.AndroidEmulator;
import com.github.unidbg.Emulator;
import com.github.unidbg.file.FileResult;
import com.github.unidbg.file.IOResolver;
import com.github.unidbg.linux.android.AndroidEmulatorBuilder;
import com.github.unidbg.linux.android.AndroidResolver;
import com.github.unidbg.linux.android.dvm.DalvikModule;
import com.github.unidbg.linux.android.dvm.DvmClass;
import com.github.unidbg.linux.android.dvm.VM;
import com.github.unidbg.linux.file.SimpleFileIO;
import com.github.unidbg.memory.Memory;
import java.io.File;
import java.io.IOException;

public class FileDemo{
    private final AndroidEmulator emulator;
    private final DvmClass MainActivity;
    private final VM vm;

    public FileDemo() {
        emulator = AndroidEmulatorBuilder
                .for32Bit()
                //虚拟目录
                .setRootDir(new File("unidbg-android/src/test/resources/FileDemo/VFS"))
                .build();
        Memory memory = emulator.getMemory();
        memory.setLibraryResolver(new AndroidResolver(23));
        vm = emulator.createDalvikVM(new File("unidbg-android/src/test/resources/FileDemo/app-debug.apk"));
        // 打开日志
        vm.setVerbose(true);
        // 在SO加载前添加文件重定位器
        emulator.getSyscallHandler().addIOResolver(new MyIOResolver());
        DalvikModule dm = vm.loadLibrary("fileinunidbg", true);
        MainActivity = vm.resolveClass("com/example/fileinunidbg/MainActivity");
        dm.callJNI_OnLoad(emulator);
    }

    public void destroy() throws IOException {
        emulator.close();
    }

    public void call(String pathName) {
        String methodSign = "stringFromJNI(Ljava/lang/String;)Ljava/lang/String;";
        MainActivity.callStaticJniMethodObject(emulator, methodSign, pathName);
    }

    public static void main(String[] args) throws IOException {
        FileDemo fileDemo = new FileDemo();

        String arg = "/data/user/0/com.example.fileinunidbg/files";
        fileDemo.call(arg);
        // 运行结束后关闭
        fileDemo.destroy();
    }


}

package com.file;

import com.github.unidbg.Emulator;
import com.github.unidbg.file.FileResult;
import com.github.unidbg.file.IOResolver;
import com.github.unidbg.linux.file.ByteArrayFileIO;
import com.github.unidbg.linux.file.DirectoryFileIO;
import com.github.unidbg.linux.file.SimpleFileIO;

import java.io.File;
import java.nio.charset.StandardCharsets;

public class MyIOResolver implements IOResolver {
    @Override
    public FileResult resolve(Emulator emulator, String pathname, int oflags) {
        System.out.println("lilac open file:"+pathname);
        if(pathname.equals("/data/user/0/com.example.fileinunidbg/files/key.txt")){
            return FileResult.success(new SimpleFileIO(oflags, new File("unidbg-android/src/test/resources/FileDemo/key.txt"), pathname));
//            return FileResult.success(new ByteArrayFileIO(oflags, pathname, String.valueOf(System.currentTimeMillis()).getBytes(StandardCharsets.UTF_8)));
//            return null;
//            return FileResult.failed(13);
        }
//        // 返回对应的文件夹（目录文件）
//        if(pathname.equals("/data/user/0/com.example.fileinunidbg/files/demo2")){
//            return FileResult.success(new DirectoryFileIO(oflags, pathname,new File("unidbg-android/src/test/resources/FileDemo/demo2")))
//            return FileResult.success(new DirectoryFileIO(oflags, pathname, new DirectoryFileIO.DirectoryEntry(true, String.valueOf(System.currentTimeMillis())), new DirectoryFileIO.DirectoryEntry(true, "1234")));
//        }
//        if(pathname.equals("/data/user/0/com.example.fileinunidbg/files/demo2/1.txt")){
//            return FileResult.success(new SimpleFileIO(oflags, new File("unidbg-android/src/test/resources/FileDemo/demo2/1.txt"), pathname));
//        }
//        if(pathname.equals("/data/user/0/com.example.fileinunidbg/files/demo2/2.txt")){
//            return FileResult.success(new SimpleFileIO(oflags, new File("unidbg-android/src/test/resources/FileDemo/demo2/2.txt"), pathname));
//        }
//        if(pathname.equals("/data/user/0/com.example.fileinunidbg/files/demo2/3.txt")){
//            return FileResult.success(new SimpleFileIO(oflags, new File("unidbg-android/src/test/resources/FileDemo/demo2/3.txt"), pathname));
//        }

        return null;
    }
}

文章来源:https://blog.csdn.net/weixin_38927522/article/details/128085091
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