我的应用程序有一个特定的功能,只能在根可用的设备上工作。与其让这个特性在使用时失败(然后向用户显示适当的错误消息),我更希望能够先静默地检查根目录是否可用,如果不可用,则首先隐藏相应的选项。

有办法做到这一点吗?


当前回答

Java级别的根检查不是一个安全的解决方案。如果您的应用程序在root设备上运行有安全问题,那么请使用此解决方案。

凯文的答案是有效的,除非手机也有像RootCloak这样的应用程序。这样的应用程序有一个对Java api的句柄,一旦手机是根的,他们模仿这些api来返回手机不是根的。

我已经写了一个原生级别的代码基于凯文的答案,它甚至与RootCloak !此外,它不会导致任何内存泄漏问题。

#include <string.h>
#include <jni.h>
#include <time.h>
#include <sys/stat.h>
#include <stdio.h>
#include "android_log.h"
#include <errno.h>
#include <unistd.h>
#include <sys/system_properties.h>

JNIEXPORT int JNICALL Java_com_test_RootUtils_checkRootAccessMethod1(
        JNIEnv* env, jobject thiz) {


    //Access function checks whether a particular file can be accessed
    int result = access("/system/app/Superuser.apk",F_OK);

    ANDROID_LOGV( "File Access Result %d\n", result);

    int len;
    char build_tags[PROP_VALUE_MAX]; // PROP_VALUE_MAX from <sys/system_properties.h>.
    len = __system_property_get(ANDROID_OS_BUILD_TAGS, build_tags); // On return, len will equal (int)strlen(model_id).
    if(strcmp(build_tags,"test-keys") == 0){
        ANDROID_LOGV( "Device has test keys\n", build_tags);
        result = 0;
    }
    ANDROID_LOGV( "File Access Result %s\n", build_tags);
    return result;

}

JNIEXPORT int JNICALL Java_com_test_RootUtils_checkRootAccessMethod2(
        JNIEnv* env, jobject thiz) {
    //which command is enabled only after Busy box is installed on a rooted device
    //Outpput of which command is the path to su file. On a non rooted device , we will get a null/ empty path
    //char* cmd = const_cast<char *>"which su";
    FILE* pipe = popen("which su", "r");
    if (!pipe) return -1;
    char buffer[128];
    std::string resultCmd = "";
    while(!feof(pipe)) {
        if(fgets(buffer, 128, pipe) != NULL)
            resultCmd += buffer;
    }
    pclose(pipe);

    const char *cstr = resultCmd.c_str();
    int result = -1;
    if(cstr == NULL || (strlen(cstr) == 0)){
        ANDROID_LOGV( "Result of Which command is Null");
    }else{
        result = 0;
        ANDROID_LOGV( "Result of Which command %s\n", cstr);
        }
    return result;

}

JNIEXPORT int JNICALL Java_com_test_RootUtils_checkRootAccessMethod3(
        JNIEnv* env, jobject thiz) {


    int len;
    char build_tags[PROP_VALUE_MAX]; // PROP_VALUE_MAX from <sys/system_properties.h>.
    int result = -1;
    len = __system_property_get(ANDROID_OS_BUILD_TAGS, build_tags); // On return, len will equal (int)strlen(model_id).
    if(len >0 && strstr(build_tags,"test-keys") != NULL){
        ANDROID_LOGV( "Device has test keys\n", build_tags);
        result = 0;
    }

    return result;

}

在Java代码中,需要创建包装器类RootUtils来进行本机调用

    public boolean checkRooted() {

       if( rootUtils.checkRootAccessMethod3()  == 0 || rootUtils.checkRootAccessMethod1()  == 0 || rootUtils.checkRootAccessMethod2()  == 0 )
           return true;
      return false;
     }

其他回答

你可以使用isAccessGiven()代替isRootAvailable()。直接从RootTools wiki:

if (RootTools.isAccessGiven()) {
    // your app has been granted root access
}

RootTools.isAccessGiven()不仅检查设备是否已根,它还检查设备是否已根 也为你的应用程序调用su,请求权限,如果返回true 您的应用程序已成功授予根权限。可以使用这个 作为在你的应用程序中的第一个检查,以确保你将被授予 在需要的时候访问。

参考

使用c++和ndk是最好的方法来检测根,即使用户使用的应用程序隐藏了他的根,如RootCloak。我用RootCloak测试了这段代码,即使用户试图隐藏它,我也能够检测到根。 所以你的cpp文件是这样的:

#include <jni.h>
#include <string>


/**
 *
 * function that checks for the su binary files and operates even if 
 * root cloak is installed
 * @return integer 1: device is rooted, 0: device is not 
 *rooted
*/
extern "C"
JNIEXPORT int JNICALL


Java_com_example_user_root_1native_rootFunction(JNIEnv *env,jobject thiz){
const char *paths[] ={"/system/app/Superuser.apk", "/sbin/su", "/system/bin/su",
                      "/system/xbin/su", "/data/local/xbin/su", "/data/local/bin/su", "/system/sd/xbin/su",
                      "/system/bin/failsafe/su", "/data/local/su", "/su/bin/su"};

int counter =0;
while (counter<9){
    if(FILE *file = fopen(paths[counter],"r")){
        fclose(file);
        return 1;
    }
    counter++;
}
return 0;
}

您将从java代码中调用该函数,如下所示

public class Root_detect {



   /**
    *
    * function that calls a native function to check if the device is 
    *rooted or not
    * @return boolean: true if the device is rooted, false if the 
    *device is not rooted
   */
   public boolean check_rooted(){

        int checker = rootFunction();

        if(checker==1){
           return true;
        }else {
           return false;
        }
   }
   static {
    System.loadLibrary("cpp-root-lib");//name of your cpp file
   }

   public native int rootFunction();
}

如果你不想使用任何第三方库或任何随机解决方案,那么就使用谷歌库来检测它。

Android设备验证

回应:

{
  "timestampMs": 9860437986543,
  "nonce": "R2Rra24fVm5xa2Mg",
  "apkPackageName": "com.package.name.of.requesting.app",
  "apkCertificateDigestSha256": ["base64 encoded, SHA-256 hash of the
                                  certificate used to sign requesting app"],
  "ctsProfileMatch": true,
  "basicIntegrity": true,
}

ctsprofilmatch如果设备已根,则给出false。

参考链接: [1]: https://developer.android.com/training/safetynet/attestation

    public static boolean isRootAvailable(){
            Process p = null;
            try{
               p = Runtime.getRuntime().exec(new String[] {"su"});
               writeCommandToConsole(p,"exit 0");
               int result = p.waitFor();
               if(result != 0)
                   throw new Exception("Root check result with exit command " + result);
               return true;
            } catch (IOException e) {
                Log.e(LOG_TAG, "Su executable is not available ", e);
            } catch (Exception e) {
                Log.e(LOG_TAG, "Root is unavailable ", e);
            }finally {
                if(p != null)
                    p.destroy();
            }
            return false;
        }
 private static String writeCommandToConsole(Process proc, String command, boolean ignoreError) throws Exception{
            byte[] tmpArray = new byte[1024];
            proc.getOutputStream().write((command + "\n").getBytes());
            proc.getOutputStream().flush();
            int bytesRead = 0;
            if(proc.getErrorStream().available() > 0){
                if((bytesRead = proc.getErrorStream().read(tmpArray)) > 1){
                    Log.e(LOG_TAG,new String(tmpArray,0,bytesRead));
                    if(!ignoreError)
                        throw new Exception(new String(tmpArray,0,bytesRead));
                }
            }
            if(proc.getInputStream().available() > 0){
                bytesRead = proc.getInputStream().read(tmpArray);
                Log.i(LOG_TAG, new String(tmpArray,0,bytesRead));
            }
            return new String(tmpArray);
        }

Java级别的根检查不是一个安全的解决方案。如果您的应用程序在root设备上运行有安全问题,那么请使用此解决方案。

凯文的答案是有效的,除非手机也有像RootCloak这样的应用程序。这样的应用程序有一个对Java api的句柄,一旦手机是根的,他们模仿这些api来返回手机不是根的。

我已经写了一个原生级别的代码基于凯文的答案,它甚至与RootCloak !此外,它不会导致任何内存泄漏问题。

#include <string.h>
#include <jni.h>
#include <time.h>
#include <sys/stat.h>
#include <stdio.h>
#include "android_log.h"
#include <errno.h>
#include <unistd.h>
#include <sys/system_properties.h>

JNIEXPORT int JNICALL Java_com_test_RootUtils_checkRootAccessMethod1(
        JNIEnv* env, jobject thiz) {


    //Access function checks whether a particular file can be accessed
    int result = access("/system/app/Superuser.apk",F_OK);

    ANDROID_LOGV( "File Access Result %d\n", result);

    int len;
    char build_tags[PROP_VALUE_MAX]; // PROP_VALUE_MAX from <sys/system_properties.h>.
    len = __system_property_get(ANDROID_OS_BUILD_TAGS, build_tags); // On return, len will equal (int)strlen(model_id).
    if(strcmp(build_tags,"test-keys") == 0){
        ANDROID_LOGV( "Device has test keys\n", build_tags);
        result = 0;
    }
    ANDROID_LOGV( "File Access Result %s\n", build_tags);
    return result;

}

JNIEXPORT int JNICALL Java_com_test_RootUtils_checkRootAccessMethod2(
        JNIEnv* env, jobject thiz) {
    //which command is enabled only after Busy box is installed on a rooted device
    //Outpput of which command is the path to su file. On a non rooted device , we will get a null/ empty path
    //char* cmd = const_cast<char *>"which su";
    FILE* pipe = popen("which su", "r");
    if (!pipe) return -1;
    char buffer[128];
    std::string resultCmd = "";
    while(!feof(pipe)) {
        if(fgets(buffer, 128, pipe) != NULL)
            resultCmd += buffer;
    }
    pclose(pipe);

    const char *cstr = resultCmd.c_str();
    int result = -1;
    if(cstr == NULL || (strlen(cstr) == 0)){
        ANDROID_LOGV( "Result of Which command is Null");
    }else{
        result = 0;
        ANDROID_LOGV( "Result of Which command %s\n", cstr);
        }
    return result;

}

JNIEXPORT int JNICALL Java_com_test_RootUtils_checkRootAccessMethod3(
        JNIEnv* env, jobject thiz) {


    int len;
    char build_tags[PROP_VALUE_MAX]; // PROP_VALUE_MAX from <sys/system_properties.h>.
    int result = -1;
    len = __system_property_get(ANDROID_OS_BUILD_TAGS, build_tags); // On return, len will equal (int)strlen(model_id).
    if(len >0 && strstr(build_tags,"test-keys") != NULL){
        ANDROID_LOGV( "Device has test keys\n", build_tags);
        result = 0;
    }

    return result;

}

在Java代码中,需要创建包装器类RootUtils来进行本机调用

    public boolean checkRooted() {

       if( rootUtils.checkRootAccessMethod3()  == 0 || rootUtils.checkRootAccessMethod1()  == 0 || rootUtils.checkRootAccessMethod2()  == 0 )
           return true;
      return false;
     }