From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Arc Wang <arcwang@google.com>
Date: Fri, 6 May 2022 17:42:30 +0800
Subject: [PATCH] Verify ringtone from ringtone picker is audio

To improve privacy.

Bug: 221041256
Test: atest com.android.settings.DefaultRingtonePreferenceTest
Change-Id: I0a9ca163f5ae91b67c9f957fde4c6db326b8718d
Merged-In: I0a9ca163f5ae91b67c9f957fde4c6db326b8718d
(cherry picked from commit e4c22580c9a66a3d5523782c2daa707531210227)
(cherry picked from commit 640eab60f2baa9052d395fccd4a0324103ad6c7a)
Merged-In: I0a9ca163f5ae91b67c9f957fde4c6db326b8718d
---
 .../settings/DefaultRingtonePreference.java    | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/com/android/settings/DefaultRingtonePreference.java b/src/com/android/settings/DefaultRingtonePreference.java
index 9f9f832b10..751eb8c8e7 100644
--- a/src/com/android/settings/DefaultRingtonePreference.java
+++ b/src/com/android/settings/DefaultRingtonePreference.java
@@ -22,6 +22,7 @@ import android.content.Intent;
 import android.media.RingtoneManager;
 import android.net.Uri;
 import android.util.AttributeSet;
+import android.util.Log;
 
 public class DefaultRingtonePreference extends RingtonePreference {
     private static final String TAG = "DefaultRingtonePreference";
@@ -43,6 +44,23 @@ public class DefaultRingtonePreference extends RingtonePreference {
 
     @Override
     protected void onSaveRingtone(Uri ringtoneUri) {
+        String mimeType = getContext().getContentResolver().getType(ringtoneUri);
+        if (mimeType == null) {
+            Log.e(TAG, "onSaveRingtone for URI:" + ringtoneUri
+                    + " ignored: failure to find mimeType (no access from this context?)");
+            return;
+        }
+
+        if (!(mimeType.startsWith("audio/") || mimeType.equals("application/ogg"))) {
+            Log.e(TAG, "onSaveRingtone for URI:" + ringtoneUri
+                    + " ignored: associated mimeType:" + mimeType + " is not an audio type");
+            return;
+        }
+
+        setActualDefaultRingtoneUri(ringtoneUri);
+    }
+
+    void setActualDefaultRingtoneUri(Uri ringtoneUri) {
         RingtoneManager.setActualDefaultRingtoneUri(mUserContext, getRingtoneType(), ringtoneUri);
     }
 
