Secure localisation app Xamarin.Forms , Xamarin.Ios , Xamarin.Android

Question

Good morning , I am developing a xamarin application which allows you to locate its user.

Given the importance of the user's location, I must reassure myself of the use of the exact location, i.e. avoid that:

• Do not mislead the application with a fake GPS application (justify Location of xamarin essentials which allows you to manage this)

• That the user cannot install the software on the PC emulators.

• That the user cannot inject code to avoid this verification.

Are there any solutions in xamarin allowing me to resolve these problems in a secure and efficient manner in order to achieve my objectives (have a reliable location).

Thanks in advance

Answer 1

You can use the Xamarin.Essentials: Geolocation. It has the method to detecte Mock Locations.

var request = new GeolocationRequest(GeolocationAccuracy.Medium);
var location = await Geolocation.GetLocationAsync(request);

if (location != null)
{
    if(location.IsFromMockProvider)
    {
        // location is from a mock provider
    }
}

That the user cannot install the software on the PC emulators.

First, you can add permission to read the file system in your AndroidManifest.xml.

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

Second, Create a method to read the contents of '/proc/cpuinfo':

using System.IO;
using System.Text;

public string GetCpuInfo()
{
    StringBuilder sb = new StringBuilder();
    try
    {
        using (StreamReader sr = new StreamReader("/proc/cpuinfo"))
        {
            string line;
            while ((line = sr.ReadLine()) != null)
            {
                sb.AppendLine(line);
            }
        }
    }
    catch (IOException ex)
    {
        // Handle exception
    }

    return sb.ToString();
}

Then, you can call this method get and display CPU information.

string cpuInfo = GetCpuInfo();