1 package com.android.nfc;
2 
3 
4 import android.content.Context;
5 import android.os.UserHandle;
6 
7 public class NfcPermissions {
8 
9     /**
10      * NFC ADMIN permission - only for system apps
11      */
12     private static final String ADMIN_PERM = android.Manifest.permission.WRITE_SECURE_SETTINGS;
13     private static final String ADMIN_PERM_ERROR = "WRITE_SECURE_SETTINGS permission required";
14 
15     /**
16      * Regular NFC permission
17      */
18     static final String NFC_PERMISSION = android.Manifest.permission.NFC;
19     private static final String NFC_PERM_ERROR = "NFC permission required";
20 
21     /**
22      * NFC PREFERRED PAYMENT INFO permission
23      */
24     static final String NFC_PREFERRED_PAYMENT_INFO_PERMISSION =
25             android.Manifest.permission.NFC_PREFERRED_PAYMENT_INFO;
26     private static final String NFC_PREFERRED_PAYMENT_INFO_PERM_ERROR =
27             "NFC_PREFERRED_PAYMENT_INFO permission required";
28 
validateUserId(int userId)29     public static void validateUserId(int userId) {
30         if (userId != UserHandle.getCallingUserId()) {
31             throw new SecurityException("userId passed in is not the calling user.");
32         }
33     }
34 
enforceAdminPermissions(Context context)35     public static void enforceAdminPermissions(Context context) {
36         context.enforceCallingOrSelfPermission(ADMIN_PERM, ADMIN_PERM_ERROR);
37     }
38 
39 
enforceUserPermissions(Context context)40     public static void enforceUserPermissions(Context context) {
41         context.enforceCallingOrSelfPermission(NFC_PERMISSION, NFC_PERM_ERROR);
42     }
43 
enforcePreferredPaymentInfoPermissions(Context context)44     public static void enforcePreferredPaymentInfoPermissions(Context context) {
45         context.enforceCallingOrSelfPermission(NFC_PREFERRED_PAYMENT_INFO_PERMISSION,
46                 NFC_PREFERRED_PAYMENT_INFO_PERM_ERROR);
47     }
48 }
49