RootCheck

RootCheck.java

package com.myapp.utils;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Scanner;

import android.content.Context;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;

public class RootCheck {

	final Context mContext;

	public RootCheck(Context context) {
		mContext = context;
	}

	public boolean detectThreats() {
		boolean rootManagement = detectRootManagementApps();
		boolean potentiallyDangerousApps = detectPotentiallyDangerousApps();
		boolean suBinary = checkForBinary("su");
		boolean busyboxBinary = checkForBinary("busybox");
		boolean dangerousProps = checkForDangerousProps();
		boolean rwSystem = checkForRWSystem();
		boolean testKeys = detectTestKeys();

		boolean result = rootManagement || potentiallyDangerousApps || suBinary
				|| busyboxBinary || dangerousProps || rwSystem || testKeys;

		return result;
	}

	public boolean detectTestKeys() {
		String buildTags = android.os.Build.TAGS;

		if (buildTags != null && buildTags.contains("test-keys")) {
			return true;
		}
		return false;
	}

	public boolean detectRootManagementApps() {

		boolean result = false;

		final String[] knownRootAppsPackages = { "com.noshufou.android.su",
				"eu.chainfire.supersu", "com.koushikdutta.superuser" };

		PackageManager pm = mContext.getPackageManager();

		for (String packageName : knownRootAppsPackages) {
			try {
				// Root app detected
				pm.getPackageInfo(packageName, 0);
				QLog.e(packageName + " ROOT management app detected!");
				result = true;
			} catch (NameNotFoundException e) {
				// Exception thrown, package is not installed into the system
				continue;
			}
		}

		return result;
	}

	public boolean detectPotentiallyDangerousApps() {

		final String[] knownRootAppsPackages = { "com.koushikdutta.rommanager",
				"com.dimonvideo.luckypatcher", "com.chelpus.lackypatch" };

		boolean result = false;

		PackageManager pm = mContext.getPackageManager();

		for (String packageName : knownRootAppsPackages) {
			try {
				// app detected
				pm.getPackageInfo(packageName, 0);
				QLog.e(packageName + " potentially dangerous app detected!");
				result = true;
			} catch (NameNotFoundException e) {
				// Exception thrown, package is not installed into the system
				continue;
			}
		}

		return result;
	}

	public boolean checkForBinary(String filename) {

		String[] pathsArray = { "/sbin/", "/system/bin/", "/system/xbin/",
				"/data/local/xbin/", "/data/local/bin/", "/system/sd/xbin/",
				"/system/bin/failsafe/", "/data/local/" };

		boolean result = false;

		for (String path : pathsArray) {
			String completePath = path + filename;
			File f = new File(completePath);
			boolean fileExists = f.exists();
			if (fileExists) {
				QLog.v(completePath + " binary detected!");
				result = true;
			}
		}

		return result;
	}

	private String[] propsReader() {
		InputStream inputstream = null;
		try {
			inputstream = Runtime.getRuntime().exec("getprop").getInputStream();
		} catch (IOException e) {
			e.printStackTrace();
		}
		String propval = "";
		try {

			propval = new Scanner(inputstream).useDelimiter("\\A").next();

		} catch (NoSuchElementException e) {
			e.printStackTrace();
		}

		return propval.split("\n");
	}

	private String[] mountReader() {
		InputStream inputstream = null;
		try {
			inputstream = Runtime.getRuntime().exec("mount").getInputStream();
		} catch (IOException e) {
			e.printStackTrace();
		}
		String propval = "";
		try {

			propval = new Scanner(inputstream).useDelimiter("\\A").next();

		} catch (NoSuchElementException e) {
			e.printStackTrace();
		}

		return propval.split("\n");
	}

	public boolean checkForDangerousProps() {

		final Map<String, String> dangerousProps = new HashMap<String, String>();
		dangerousProps.put("ro.debuggable", "1");
		dangerousProps.put("ro.secure", "0");

		boolean result = false;

		String[] lines = propsReader();
		for (String line : lines) {
			for (String key : dangerousProps.keySet()) {
				if (line.contains(key)) {
					String badValue = dangerousProps.get(key);
					badValue = "[" + badValue + "]";
					if (line.contains(badValue)) {
						QLog.v(key + " = " + badValue + " detected!");
						result = true;
					}
				}
			}
		}
		return result;
	}

	public boolean checkForRWSystem() {

		boolean result = false;

		String[] lines = mountReader();

		for (String line : lines) {
			if (line.contains("/system")) {
				if (line.contains(" rw,")) {
					QLog.v("System partition mounted with rw permissions!");
					result = true;
					break;
				}
			}
		}

		return result;
	}

}