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Fix issue #37220301: Allow broadcasts with permissions to not be restricted

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Allowed!

Test: new CTS tests added.
Change-Id: I16f49746c0d6f5368625b54df6ffb510aa4cb5ab
This commit is contained in:
Dianne Hackborn
2017-04-11 17:38:42 -07:00
parent 4a30689414
commit b8633f3a2e
1 changed files with 29 additions and 1 deletions
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30
services/core/java/com/android/server/am/BroadcastQueue.java
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@@ -16,6 +16,8 @@
package com.android.server.am;
import android.content.pm.IPackageManager;
import android.content.pm.PermissionInfo;
import android.os.Trace;
import java.io.FileDescriptor;
import java.io.PrintWriter;
@@ -795,6 +797,31 @@ public final class BroadcastQueue {
.sendToTarget();
}
/**
* Return true if all given permissions are signature-only perms.
*/
final boolean isSignaturePerm(String[] perms) {
if (perms == null) {
return false;
}
IPackageManager pm = AppGlobals.getPackageManager();
for (int i = perms.length-1; i >= 0; i--) {
try {
PermissionInfo pi = pm.getPermissionInfo(perms[i], 0);
if ((pi.protectionLevel & (PermissionInfo.PROTECTION_MASK_BASE
| PermissionInfo.PROTECTION_FLAG_PRIVILEGED))
!= PermissionInfo.PROTECTION_SIGNATURE) {
// If this a signature permission and NOT allowed for privileged apps, it
// is okay... otherwise, nope!
return false;
}
} catch (RemoteException e) {
return false;
}
}
return true;
}
final void processNextBroadcast(boolean fromMsg) {
synchronized(mService) {
BroadcastRecord r;
@@ -1246,7 +1273,8 @@ public final class BroadcastQueue {
|| (r.intent.getComponent() == null
&& r.intent.getPackage() == null
&& ((r.intent.getFlags()
& Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND) == 0))) {
& Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND) == 0)
&& !isSignaturePerm(r.requiredPermissions))) {
mService.addBackgroundCheckViolationLocked(r.intent.getAction(),
component.getPackageName());
Slog.w(TAG, "Background execution not allowed: receiving "