Report permission flags for all protections based on SDK

am: adb8c522a8

Change-Id: I259df147b8345f6bdba5a1ed31d01d3c42e90518

4 files changed, 54 insertions, 9 deletions

diff --git a/core/java/android/app/ApplicationPackageManager.java b/core/java/android/app/ApplicationPackageManager.java
index e5c420876c8a..4df633fabf3c 100644
--- a/core/java/android/app/ApplicationPackageManager.java
+++ b/core/java/android/app/ApplicationPackageManager.java
@@ -281,7 +281,8 @@ public class ApplicationPackageManager extends PackageManager {
     public PermissionInfo getPermissionInfo(String name, int flags)
             throws NameNotFoundException {
         try {
-            PermissionInfo pi = mPM.getPermissionInfo(name, flags);
+            PermissionInfo pi = mPM.getPermissionInfo(name,
+                    mContext.getOpPackageName(), flags);
             if (pi != null) {
                 return pi;
             }
diff --git a/core/java/android/content/pm/IPackageManager.aidl b/core/java/android/content/pm/IPackageManager.aidl
index e8e0eb350623..126a7759bb4a 100644
--- a/core/java/android/content/pm/IPackageManager.aidl
+++ b/core/java/android/content/pm/IPackageManager.aidl
@@ -71,7 +71,7 @@ interface IPackageManager {
     String[] currentToCanonicalPackageNames(in String[] names);
     String[] canonicalToCurrentPackageNames(in String[] names);
 
-    PermissionInfo getPermissionInfo(String name, int flags);
+    PermissionInfo getPermissionInfo(String name, String packageName, int flags);
 
     ParceledListSlice queryPermissionsByGroup(String group, int flags);
 
diff --git a/services/core/java/com/android/server/am/BroadcastQueue.java b/services/core/java/com/android/server/am/BroadcastQueue.java
index b3a2c291760c..2142c9467293 100644
--- a/services/core/java/com/android/server/am/BroadcastQueue.java
+++ b/services/core/java/com/android/server/am/BroadcastQueue.java
@@ -802,7 +802,7 @@ public final class BroadcastQueue {
         IPackageManager pm = AppGlobals.getPackageManager();
         for (int i = perms.length-1; i >= 0; i--) {
             try {
-                PermissionInfo pi = pm.getPermissionInfo(perms[i], 0);
+                PermissionInfo pi = pm.getPermissionInfo(perms[i], "android", 0);
                 if ((pi.protectionLevel & (PermissionInfo.PROTECTION_MASK_BASE
                         | PermissionInfo.PROTECTION_FLAG_PRIVILEGED))
                         != PermissionInfo.PROTECTION_SIGNATURE) {
diff --git a/services/core/java/com/android/server/pm/PackageManagerService.java b/services/core/java/com/android/server/pm/PackageManagerService.java
index 9f518c392803..41cfc0ac8c62 100644
--- a/services/core/java/com/android/server/pm/PackageManagerService.java
+++ b/services/core/java/com/android/server/pm/PackageManagerService.java
@@ -3996,18 +3996,62 @@ public class PackageManagerService extends IPackageManager.Stub
     }
 
     @Override
-    public PermissionInfo getPermissionInfo(String name, int flags) {
-        if (getInstantAppPackageName(Binder.getCallingUid()) != null) {
+    public PermissionInfo getPermissionInfo(String name, String packageName, int flags) {
+        final int callingUid = Binder.getCallingUid();
+        if (getInstantAppPackageName(callingUid) != null) {
             return null;
         }
         // reader
         synchronized (mPackages) {
             final BasePermission p = mSettings.mPermissions.get(name);
-            if (p != null) {
-                return generatePermissionInfo(p, flags);
-            }
-            return null;
+            // If the caller is an app that targets pre 26 SDK drop protection flags.
+            final PermissionInfo permissionInfo = generatePermissionInfo(p, flags);
+            permissionInfo.protectionLevel = adjustPermissionProtectionFlagsLPr(
+                    permissionInfo.protectionLevel, packageName, callingUid);
+            return permissionInfo;
+        }
+    }
+
+    private int adjustPermissionProtectionFlagsLPr(int protectionLevel,
+            String packageName, int uid) {
+        // Signature permission flags area always reported
+        final int protectionLevelMasked = protectionLevel
+                & (PermissionInfo.PROTECTION_NORMAL
+                | PermissionInfo.PROTECTION_DANGEROUS
+                | PermissionInfo.PROTECTION_SIGNATURE);
+        if (protectionLevelMasked == PermissionInfo.PROTECTION_SIGNATURE) {
+            return protectionLevel;
+        }
+
+        // System sees all flags.
+        final int appId = UserHandle.getAppId(uid);
+        if (appId == Process.SYSTEM_UID || appId == Process.ROOT_UID
+                || appId == Process.SHELL_UID) {
+            return protectionLevel;
         }
+
+        // Normalize package name to handle renamed packages and static libs
+        packageName = resolveInternalPackageNameLPr(packageName,
+                PackageManager.VERSION_CODE_HIGHEST);
+
+        // Apps that target O see flags for all protection levels.
+        final PackageSetting ps = mSettings.mPackages.get(packageName);
+        if (ps == null) {
+            return protectionLevel;
+        }
+        if (ps.appId != appId) {
+            return protectionLevel;
+        }
+
+        final PackageParser.Package pkg = mPackages.get(packageName);
+        if (pkg == null) {
+            return protectionLevel;
+        }
+        if (pkg.applicationInfo.targetSdkVersion < Build.VERSION_CODES.O) {
+            return protectionLevelMasked;
+        }
+
+        return protectionLevel;
     }
 
     @Override