White-list grandfathered sync adapters

am: 65712b0ad3

Change-Id: I0c7cb36d593687bd8c19dd91fa6fb641e8d21d61

services/core/java/com/android/server/content/SyncManager.java

@@ -645,6 +645,37 @@ public class SyncManager {
                 mContext.startService(startServiceIntent);
             }
         });
+
+        // Sync adapters were able to access the synced account without the accounts
+        // permission which circumvents our permission model. Therefore, we require
+        // sync adapters that don't have access to the account to get user consent.
+        // This can be noisy, therefore we will white-list sync adapters installed
+        // before we started checking for account access because they already know
+        // the account (they run before) which is the genie is out of the bottle.
+        whiteListExistingSyncAdaptersIfNeeded();
+    }
+
+    private void whiteListExistingSyncAdaptersIfNeeded() {
+        if (!mSyncStorageEngine.shouldGrantSyncAdaptersAccountAccess()) {
+            return;
+        }
+        List<UserInfo> users = mUserManager.getUsers(true);
+        final int userCount = users.size();
+        for (int i = 0; i < userCount; i++) {
+            UserHandle userHandle = users.get(i).getUserHandle();
+            final int userId = userHandle.getIdentifier();
+            for (RegisteredServicesCache.ServiceInfo<SyncAdapterType> service
+                    : mSyncAdapters.getAllServices(userId)) {
+                String packageName = service.componentName.getPackageName();
+                for (Account account : mAccountManager.getAccountsByTypeAsUser(
+                        service.type.accountType, userHandle)) {
+                    if (!canAccessAccount(account, packageName, userId)) {
+                        mAccountManager.updateAppPermission(account,
+                                AccountManager.ACCOUNT_ACCESS_TOKEN, service.uid, true);
+                    }
+                }
+            }
+        }
     }
 
     private boolean isDeviceProvisioned() {

services/core/java/com/android/server/content/SyncStorageEngine.java

@@ -137,7 +137,7 @@ public class SyncStorageEngine extends Handler {
     private static final boolean SYNC_ENABLED_DEFAULT = false;
 
     // the version of the accounts xml file format
-    private static final int ACCOUNTS_VERSION = 2;
+    private static final int ACCOUNTS_VERSION = 3;
 
     private static HashMap<String, String> sAuthorityRenames;
     private static PeriodicSyncAddedListener mPeriodicSyncAddedListener;
@@ -408,6 +408,8 @@ public class SyncStorageEngine extends Handler {
     private OnSyncRequestListener mSyncRequestListener;
     private OnAuthorityRemovedListener mAuthorityRemovedListener;
 
+    private boolean mGrantSyncAdaptersAccountAccess;
+
     private SyncStorageEngine(Context context, File dataDir) {
         mContext = context;
         sSyncStorageEngine = this;
@@ -1410,6 +1412,10 @@ public class SyncStorageEngine extends Handler {
         }
     }
 
+    public boolean shouldGrantSyncAdaptersAccountAccess() {
+        return mGrantSyncAdaptersAccountAccess;
+    }
+
     /**
      * public for testing
      */
@@ -1464,6 +1470,11 @@ public class SyncStorageEngine extends Handler {
                 } catch (NumberFormatException e) {
                     version = 0;
                 }
+
+                if (version < 3) {
+                    mGrantSyncAdaptersAccountAccess = true;
+                }
+
                 String nextIdString = parser.getAttributeValue(null, XML_ATTR_NEXT_AUTHORITY_ID);
                 try {
                     int id = (nextIdString == null) ? 0 : Integer.parseInt(nextIdString);