public async System.Threading.Tasks.Task AttestateAsync(Activity activity)
{
try
{
var api = RestService.For <ApiService>("https://devenir.andrewkir.ru");
JSONObject obj = new JSONObject();
timestamp = DateTime.Now.Ticks.ToString();
device_id = Secure.GetString(activity.ContentResolver, Secure.AndroidId);
obj.Put("timestamp", timestamp);
obj.Put("device_id", device_id);
var response = await api.GetNonce(obj.ToString());
if (response == null)
{
AttestationResultEvent?.Invoke(false, activity.GetString(Resource.String.noInternetException));
return;
}
if (response.IsSuccessStatusCode)
{
string nonce = response.Content;
if (GoogleApiAvailability.Instance.IsGooglePlayServicesAvailable(Application.Context) == ConnectionResult.Success)
{
// The SafetyNet Attestation API is available.
SafetyNetClient client = SafetyNetClass.GetClient(activity);
var task = client.Attest(Encoding.ASCII.GetBytes(nonce), activity.Resources.GetString(Resource.String.api_safetyNetKey))
.AddOnSuccessListener(activity, new OnSuccessListener(activity, timestamp, this))
.AddOnFailureListener(activity, new OnFailureListener(activity, this));
}
else
{
// Prompt user to update Google Play services
AttestationResultEvent?.Invoke(false, activity.GetString(Resource.String.attestationGooglePlayException));
}
return;
}
else
{
AttestationResultEvent?.Invoke(false, activity.GetString(Resource.String.serverException) + $"failed with nonce");
return;
}
}
catch (HttpRequestException ex)
{
AttestationResultEvent?.Invoke(false, activity.GetString(Resource.String.serverException) + $"https exception {ex}");
}
catch (Exception ex)
{
AttestationResultEvent?.Invoke(false, activity.GetString(Resource.String.unexpectedException));
}
}
private async System.Threading.Tasks.Task CheckResultsAsync(string res, string timestamp, Activity activity)
{
try
{
var api = RestService.For <ApiService>("https://devenir.andrewkir.ru");
JSONObject obj = new JSONObject();
obj.Put("safetynet", res);
obj.Put("timestamp", timestamp);
obj.Put("device_id", Secure.GetString(activity.ContentResolver, Secure.AndroidId));
var response = await api.CreateAccessToken(obj.ToString());
if (response == null)
{
AttestationResultEvent?.Invoke(false, activity.GetString(Resource.String.noInternetException));
return;
}
if (response.IsSuccessStatusCode)
{
JSONObject resp = new JSONObject(response.Content);
try
{
string access_token = resp.GetString("access_token");
string refrest_token = resp.GetString("refresh_token");
SharedPrefsManager.SaveTokens(access_token, refrest_token);
AttestationResultEvent?.Invoke(true, null);
}
catch (JSONException)
{
AttestationResultEvent?.Invoke(false, activity.GetString(Resource.String.serverException) + $" json parsing error {response.Content}");
}
}
else
{
AttestationResultEvent?.Invoke(false, activity.GetString(Resource.String.serverException) + $" attestation error {response.Content} {response.Error.Content}");
}
}
catch (HttpRequestException)
{
AttestationResultEvent?.Invoke(false, activity.GetString(Resource.String.serviceNoConnectionException));
}
catch (Exception ex)
{
AttestationResultEvent?.Invoke(false, activity.GetString(Resource.String.unexpectedException));
}
}