From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Daniel Micay <danielmicay@gmail.com>
Date: Fri, 21 Jul 2017 08:42:55 -0400
Subject: [PATCH] support new special runtime permissions

These are treated as a runtime permission even for legacy apps. They
need to be granted by default for all apps to maintain compatibility.
---
 .../server/pm/PackageManagerService.java      |  3 +-
 .../permission/PermissionManagerService.java  | 30 ++++++++++++++-----
 2 files changed, 25 insertions(+), 8 deletions(-)

diff --git a/services/core/java/com/android/server/pm/PackageManagerService.java b/services/core/java/com/android/server/pm/PackageManagerService.java
index 893268da7f36..f91fa76b53ce 100644
--- a/services/core/java/com/android/server/pm/PackageManagerService.java
+++ b/services/core/java/com/android/server/pm/PackageManagerService.java
@@ -19732,7 +19732,8 @@ public class PackageManagerService extends IPackageManager.Stub
             }
 
             // If this permission was granted by default, make sure it is.
-            if ((oldFlags & FLAG_PERMISSION_GRANTED_BY_DEFAULT) != 0) {
+            if ((oldFlags & FLAG_PERMISSION_GRANTED_BY_DEFAULT) != 0
+                    || PermissionManagerService.isSpecialRuntimePermission(bp.getName())) {
                 if (permissionsState.grantRuntimePermission(bp, userId)
                         != PERMISSION_OPERATION_FAILURE) {
                     writeRuntimePermissions = true;
diff --git a/services/core/java/com/android/server/pm/permission/PermissionManagerService.java b/services/core/java/com/android/server/pm/permission/PermissionManagerService.java
index b902001cd359..e9267683ba19 100644
--- a/services/core/java/com/android/server/pm/permission/PermissionManagerService.java
+++ b/services/core/java/com/android/server/pm/permission/PermissionManagerService.java
@@ -770,6 +770,10 @@ public class PermissionManagerService {
         }
     }
 
+    public static boolean isSpecialRuntimePermission(final String permission) {
+        return false;
+    }
+
     private void grantPermissions(PackageParser.Package pkg, boolean replace,
             String packageOfInterest, PermissionCallback callback) {
         // IMPORTANT: There are two types of permissions: install and runtime.
@@ -878,7 +882,8 @@ public class PermissionManagerService {
                     // their permissions as always granted runtime ones since we need
                     // to keep the review required permission flag per user while an
                     // install permission's state is shared across all users.
-                    if (!appSupportsRuntimePermissions && !mSettings.mPermissionReviewRequired) {
+                    if (!appSupportsRuntimePermissions && !mSettings.mPermissionReviewRequired &&
+                            !isSpecialRuntimePermission(bp.getName())) {
                         // For legacy apps dangerous permissions are install time ones.
                         grant = GRANT_INSTALL;
                     } else if (origPermissions.hasInstallPermission(bp.getName())) {
@@ -988,7 +993,8 @@ public class PermissionManagerService {
                                                 updatedUserIds, userId);
                                     }
                                 } else if (mSettings.mPermissionReviewRequired
-                                        && !appSupportsRuntimePermissions) {
+                                        && !appSupportsRuntimePermissions
+                                        && !isSpecialRuntimePermission(bp.getName())) {
                                     // For legacy apps that need a permission review, every new
                                     // runtime permission is granted but it is pending a review.
                                     // We also need to review only platform defined runtime
@@ -1009,7 +1015,15 @@ public class PermissionManagerService {
                                         updatedUserIds = ArrayUtils.appendInt(
                                                 updatedUserIds, userId);
                                     }
-                                }
+				} else if (isSpecialRuntimePermission(bp.name) &&
+					origPermissions.getRuntimePermissionState(bp.name, userId) == null) {
+                                    if (permissionsState.grantRuntimePermission(bp, userId)
+                                            != PermissionsState.PERMISSION_OPERATION_FAILURE) {
+                                        // We changed the permission, hence have to write.
+                                        updatedUserIds = ArrayUtils.appendInt(
+                                                updatedUserIds, userId);
+                                    }
+				}
                                 // Propagate the permission flags.
                                 permissionsState.updatePermissionFlags(bp, userId, flags, flags);
                             }
@@ -1468,7 +1482,7 @@ public class PermissionManagerService {
                     && (grantedPermissions == null
                            || ArrayUtils.contains(grantedPermissions, permission))) {
                 final int flags = permissionsState.getPermissionFlags(permission, userId);
-                if (supportsRuntimePermissions) {
+                if (supportsRuntimePermissions || isSpecialRuntimePermission(bp.name)) {
                     // Installer cannot change immutable permissions.
                     if ((flags & immutableFlags) == 0) {
                         grantRuntimePermission(permission, pkg.packageName, false, callingUid,
@@ -1527,7 +1541,7 @@ public class PermissionManagerService {
         // install permission's state is shared across all users.
         if (mSettings.mPermissionReviewRequired
                 && pkg.applicationInfo.targetSdkVersion < Build.VERSION_CODES.M
-                && bp.isRuntime()) {
+                && bp.isRuntime() && !isSpecialRuntimePermission(bp.name)) {
             return;
         }
 
@@ -1563,7 +1577,8 @@ public class PermissionManagerService {
                     + permName + " for package " + packageName);
         }
 
-        if (pkg.applicationInfo.targetSdkVersion < Build.VERSION_CODES.M) {
+        if (pkg.applicationInfo.targetSdkVersion < Build.VERSION_CODES.M
+                && !isSpecialRuntimePermission(permName)) {
             Slog.w(TAG, "Cannot grant runtime permission to a legacy app");
             return;
         }
@@ -1648,7 +1663,8 @@ public class PermissionManagerService {
         // install permission's state is shared across all users.
         if (mSettings.mPermissionReviewRequired
                 && pkg.applicationInfo.targetSdkVersion < Build.VERSION_CODES.M
-                && bp.isRuntime()) {
+                && bp.isRuntime()
+                && !isSpecialRuntimePermission(permName)) {
             return;
         }