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  • NativeCode中通过JNI反射调用Java层的代码,以获取IMEI为例

    简单说,就是在NativeCode中做一些正常情况下可以在Java code中做的事儿,比如获取IMEI。

    这种做法会使得静态分析Java层代码的方法失效。

    JNIEXPORT jstring JNICALL Java_com_xxx_yyy_MainActivity_GetIMEI
      (JNIEnv* env, jobject mContext){
    
        if(mContext == 0){
            return env->NewStringUTF("[+] Error: Context is 0");
        }
        jclass cls_context = env->FindClass("android/content/Context");
        if(cls_context == 0){
            return env->NewStringUTF("[+] Error: FindClass <android/content/Context> Error");
        }
    
        jmethodID getSystemService = (env)->GetMethodID(cls_context, "getSystemService", "(Ljava/lang/String;)Ljava/lang/Object;");
        if(getSystemService == 0){
            return env->NewStringUTF("[+] Error: GetMethodID failed");
        }
    
        jfieldID TELEPHONY_SERVICE = (env)->GetStaticFieldID(cls_context, "TELEPHONY_SERVICE", "Ljava/lang/String;");
        if(TELEPHONY_SERVICE == 0){
            return env->NewStringUTF("[+] Error: GetStaticFieldID Failed");
        }
    
        jstring str = (jstring)(env)->GetStaticObjectField(cls_context, TELEPHONY_SERVICE);
        jobject telephonymanager = ((env)->CallObjectMethod(mContext, getSystemService, str));
        if(telephonymanager == 0){
            return env->NewStringUTF("[+] Error: CallObjectMethod failed");
        }
    
        jclass cls_TelephoneManager = (env)->FindClass( "android/telephony/TelephonyManager");
        if(cls_TelephoneManager == 0){
            return env->NewStringUTF("[+] Error: FindClass TelephoneManager failed");
        }
    
        jmethodID getDeviceId = ((env)->GetMethodID(cls_TelephoneManager, "getDeviceId", "()Ljava/lang/String;"));
        if(getDeviceId == 0){
            return env->NewStringUTF("[+] Error: GetMethodID getDeviceID failed");
        }
    
        jobject DeviceID = (env)->CallObjectMethod(telephonymanager,
                getDeviceId);
    
        //char DP_IMIE[128]={0};
    
        //DP_IMIE = (env)->GetStringUTFChars( DeviceID, 0);
        return (jstring)DeviceID;

     

    参考:

    http://www.cnblogs.com/luxiaofeng54/archive/2011/03/01/1968063.html

    http://www.cnblogs.com/273809717/archive/2013/02/21/2921058.html

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  • 原文地址:https://www.cnblogs.com/rainduck/p/3644124.html
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