summaryrefslogtreecommitdiffstats
path: root/src/com/android/packageinstaller/permission/ui/SecureButtonView.java
diff options
context:
space:
mode:
Diffstat (limited to 'src/com/android/packageinstaller/permission/ui/SecureButtonView.java')
-rw-r--r--src/com/android/packageinstaller/permission/ui/SecureButtonView.java56
1 files changed, 56 insertions, 0 deletions
diff --git a/src/com/android/packageinstaller/permission/ui/SecureButtonView.java b/src/com/android/packageinstaller/permission/ui/SecureButtonView.java
new file mode 100644
index 00000000..624744e5
--- /dev/null
+++ b/src/com/android/packageinstaller/permission/ui/SecureButtonView.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.packageinstaller.permission.ui;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.widget.Button;
+
+/**
+ * Extension of Button that uses the hidden MotionEvent flag for partially obscured windows to
+ * prevent tapjacking attacks.
+ */
+public class SecureButtonView extends Button {
+
+ public SecureButtonView(Context context) {
+ this(context, null);
+ }
+
+ public SecureButtonView(Context context, AttributeSet attrs) {
+ this(context, attrs, 0);
+ }
+
+ public SecureButtonView(Context context, AttributeSet attrs, int defStyleAttr) {
+ this(context, attrs, defStyleAttr, 0);
+ }
+
+ public SecureButtonView(Context context, AttributeSet attrs, int defStyleAttr,
+ int defStyleRes) {
+ super(context, attrs, defStyleAttr, defStyleRes);
+ }
+
+ @Override
+ public boolean onFilterTouchEventForSecurity(MotionEvent event) {
+ if ((event.getFlags() & MotionEvent.FLAG_WINDOW_IS_OBSCURED) != 0
+ || (event.getFlags() & MotionEvent.FLAG_WINDOW_IS_PARTIALLY_OBSCURED) != 0) {
+ // Window is obscured, drop this touch.
+ return false;
+ }
+ return true;
+ }
+}