Revert "Check for location access on TelephonyRegistry"

This reverts commit 8d584f0a91b0709b28ebc64abf0a6063429c8d58.

Reason for revert: b/72967560

Change-Id: I9ca3c4a586e740a7b7d4cc5940ca8d4e4ebf3654

4 files changed, 16 insertions, 206 deletions

diff --git a/data/etc/privapp-permissions-platform.xml b/data/etc/privapp-permissions-platform.xml
index bae03a17db79..6a3a97392955 100644
--- a/data/etc/privapp-permissions-platform.xml
+++ b/data/etc/privapp-permissions-platform.xml
@@ -146,7 +146,6 @@ applications that come with the platform
         <permission name="android.permission.LOCAL_MAC_ADDRESS"/>
         <permission name="android.permission.MANAGE_USERS"/>
         <permission name="android.permission.MODIFY_PHONE_STATE"/>
-        <permission name="android.permission.PACKAGE_USAGE_STATS"/>
         <permission name="android.permission.PERFORM_CDMA_PROVISIONING"/>
         <permission name="android.permission.READ_NETWORK_USAGE_HISTORY"/>
         <permission name="android.permission.READ_PRIVILEGED_PHONE_STATE"/>
diff --git a/services/core/java/com/android/server/TelephonyRegistry.java b/services/core/java/com/android/server/TelephonyRegistry.java
index 6743484b91c4..6747be340d46 100644
--- a/services/core/java/com/android/server/TelephonyRegistry.java
+++ b/services/core/java/com/android/server/TelephonyRegistry.java
@@ -35,7 +35,6 @@ import android.os.UserHandle;
 import android.telephony.CellInfo;
 import android.telephony.CellLocation;
 import android.telephony.DisconnectCause;
-import android.telephony.LocationAccessPolicy;
 import android.telephony.PhoneStateListener;
 import android.telephony.PreciseCallState;
 import android.telephony.PreciseDataConnectionState;
@@ -94,8 +93,7 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
         IPhoneStateListener callback;
         IOnSubscriptionsChangedListener onSubscriptionsChangedListenerCallback;
 
-        int callerUid;
-        int callerPid;
+        int callerUserId;
 
         int events;
 
@@ -119,7 +117,7 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
                     + " callback=" + callback
                     + " onSubscriptionsChangedListenererCallback="
                                             + onSubscriptionsChangedListenerCallback
-                    + " callerUid=" + callerUid + " subId=" + subId + " phoneId=" + phoneId
+                    + " callerUserId=" + callerUserId + " subId=" + subId + " phoneId=" + phoneId
                     + " events=" + Integer.toHexString(events)
                     + " canReadPhoneState=" + canReadPhoneState + "}";
         }
@@ -358,8 +356,6 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
     public void addOnSubscriptionsChangedListener(String callingPackage,
             IOnSubscriptionsChangedListener callback) {
         int callerUserId = UserHandle.getCallingUserId();
-        mContext.getSystemService(AppOpsManager.class)
-                .checkPackage(Binder.getCallingUid(), callingPackage);
         if (VDBG) {
             log("listen oscl: E pkg=" + callingPackage + " myUserId=" + UserHandle.myUserId()
                 + " callerUserId="  + callerUserId + " callback=" + callback
@@ -403,8 +399,7 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
 
             r.onSubscriptionsChangedListenerCallback = callback;
             r.callingPackage = callingPackage;
-            r.callerUid = Binder.getCallingUid();
-            r.callerPid = Binder.getCallingPid();
+            r.callerUserId = callerUserId;
             r.events = 0;
             r.canReadPhoneState = true; // permission has been enforced above
             if (DBG) {
@@ -475,8 +470,6 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
     private void listen(String callingPackage, IPhoneStateListener callback, int events,
             boolean notifyNow, int subId) {
         int callerUserId = UserHandle.getCallingUserId();
-        mContext.getSystemService(AppOpsManager.class)
-                .checkPackage(Binder.getCallingUid(), callingPackage);
         if (VDBG) {
             log("listen: E pkg=" + callingPackage + " events=0x" + Integer.toHexString(events)
                 + " notifyNow=" + notifyNow + " subId=" + subId + " myUserId="
@@ -521,8 +514,7 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
 
                 r.callback = callback;
                 r.callingPackage = callingPackage;
-                r.callerUid = Binder.getCallingUid();
-                r.callerPid = Binder.getCallingPid();
+                r.callerUserId = callerUserId;
                 boolean isPhoneStateEvent = (events & (CHECK_PHONE_STATE_PERMISSION_MASK
                         | ENFORCE_PHONE_STATE_PERMISSION_MASK)) != 0;
                 r.canReadPhoneState = isPhoneStateEvent && canReadPhoneState(callingPackage);
@@ -580,10 +572,8 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
                         try {
                             if (DBG_LOC) log("listen: mCellLocation = "
                                     + mCellLocation[phoneId]);
-                            if (checkLocationAccess(r)) {
-                                r.callback.onCellLocationChanged(
-                                        new Bundle(mCellLocation[phoneId]));
-                            }
+                            r.callback.onCellLocationChanged(
+                                    new Bundle(mCellLocation[phoneId]));
                         } catch (RemoteException ex) {
                             remove(r.binder);
                         }
@@ -629,9 +619,7 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
                         try {
                             if (DBG_LOC) log("listen: mCellInfo[" + phoneId + "] = "
                                     + mCellInfo.get(phoneId));
-                            if (checkLocationAccess(r)) {
-                                r.callback.onCellInfoChanged(mCellInfo.get(phoneId));
-                            }
+                            r.callback.onCellInfoChanged(mCellInfo.get(phoneId));
                         } catch (RemoteException ex) {
                             remove(r.binder);
                         }
@@ -991,8 +979,7 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
                 mCellInfo.set(phoneId, cellInfo);
                 for (Record r : mRecords) {
                     if (validateEventsAndUserLocked(r, PhoneStateListener.LISTEN_CELL_INFO) &&
-                            idMatch(r.subId, subId, phoneId) &&
-                            checkLocationAccess(r)) {
+                            idMatch(r.subId, subId, phoneId)) {
                         try {
                             if (DBG_LOC) {
                                 log("notifyCellInfo: mCellInfo=" + cellInfo + " r=" + r);
@@ -1275,8 +1262,7 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
                 mCellLocation[phoneId] = cellLocation;
                 for (Record r : mRecords) {
                     if (validateEventsAndUserLocked(r, PhoneStateListener.LISTEN_CELL_LOCATION) &&
-                            idMatch(r.subId, subId, phoneId) &&
-                            checkLocationAccess(r)) {
+                            idMatch(r.subId, subId, phoneId)) {
                         try {
                             if (DBG_LOC) {
                                 log("notifyCellLocation: cellLocation=" + cellLocation
@@ -1720,11 +1706,10 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
         boolean valid = false;
         try {
             foregroundUser = ActivityManager.getCurrentUser();
-            valid = UserHandle.getUserId(r.callerUid) == foregroundUser
-                    && r.matchPhoneStateListenerEvent(events);
+            valid = r.callerUserId ==  foregroundUser && r.matchPhoneStateListenerEvent(events);
             if (DBG | DBG_LOC) {
                 log("validateEventsAndUserLocked: valid=" + valid
-                        + " r.callerUid=" + r.callerUid + " foregroundUser=" + foregroundUser
+                        + " r.callerUserId=" + r.callerUserId + " foregroundUser=" + foregroundUser
                         + " r.events=" + r.events + " events=" + events);
             }
         } finally {
@@ -1756,16 +1741,6 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
         }
     }
 
-    private boolean checkLocationAccess(Record r) {
-        long token = Binder.clearCallingIdentity();
-        try {
-            return LocationAccessPolicy.canAccessCellLocation(mContext,
-                    r.callingPackage, r.callerUid, r.callerPid);
-        } finally {
-            Binder.restoreCallingIdentity(token);
-        }
-    }
-
     private void checkPossibleMissNotify(Record r, int phoneId) {
         int events = r.events;
 
@@ -1813,9 +1788,7 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
                     log("checkPossibleMissNotify: onCellInfoChanged[" + phoneId + "] = "
                             + mCellInfo.get(phoneId));
                 }
-                if (checkLocationAccess(r)) {
-                    r.callback.onCellInfoChanged(mCellInfo.get(phoneId));
-                }
+                r.callback.onCellInfoChanged(mCellInfo.get(phoneId));
             } catch (RemoteException ex) {
                 mRemoveList.add(r.binder);
             }
@@ -1863,9 +1836,7 @@ class TelephonyRegistry extends ITelephonyRegistry.Stub {
             try {
                 if (DBG_LOC) log("checkPossibleMissNotify: onCellLocationChanged mCellLocation = "
                         + mCellLocation[phoneId]);
-                if (checkLocationAccess(r)) {
-                    r.callback.onCellLocationChanged(new Bundle(mCellLocation[phoneId]));
-                }
+                r.callback.onCellLocationChanged(new Bundle(mCellLocation[phoneId]));
             } catch (RemoteException ex) {
                 mRemoveList.add(r.binder);
             }
diff --git a/telephony/java/android/telephony/LocationAccessPolicy.java b/telephony/java/android/telephony/LocationAccessPolicy.java
deleted file mode 100644
index b362df9ff677..000000000000
--- a/telephony/java/android/telephony/LocationAccessPolicy.java
+++ /dev/null
@@ -1,160 +0,0 @@
-/*
- * Copyright (C) 2017 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 android.telephony;
-
-import android.Manifest;
-import android.annotation.NonNull;
-import android.annotation.UserIdInt;
-import android.app.ActivityManager;
-import android.app.AppOpsManager;
-import android.content.BroadcastReceiver;
-import android.content.Context;
-import android.content.Intent;
-import android.content.IntentFilter;
-import android.content.pm.PackageManager;
-import android.content.pm.UserInfo;
-import android.location.LocationManager;
-import android.os.Binder;
-import android.os.Build;
-import android.os.Process;
-import android.os.Trace;
-import android.os.UserHandle;
-import android.os.UserManager;
-import android.provider.Settings;
-import android.util.SparseBooleanArray;
-
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-/**
- * Helper for performing location access checks.
- * @hide
- */
-public final class LocationAccessPolicy {
-    /**
-     * API to determine if the caller has permissions to get cell location.
-     *
-     * @param pkgName Package name of the application requesting access
-     * @param uid The uid of the package
-     * @param pid The pid of the package
-     * @return boolean true or false if permissions is granted
-     */
-    public static boolean canAccessCellLocation(@NonNull Context context, @NonNull String pkgName,
-            int uid, int pid) throws SecurityException {
-        Trace.beginSection("TelephonyLocationCheck");
-        try {
-            // Always allow the phone process to access location. This avoid breaking legacy code
-            // that rely on public-facing APIs to access cell location, and it doesn't create a
-            // info leak risk because the cell location is stored in the phone process anyway.
-            if (uid == Process.PHONE_UID) {
-                return true;
-            }
-
-            // We always require the location permission and also require the
-            // location mode to be on for non-legacy apps. Legacy apps are
-            // required to be in the foreground to at least mitigate the case
-            // where a legacy app the user is not using tracks their location.
-            // Granting ACCESS_FINE_LOCATION to an app automatically grants it
-            // ACCESS_COARSE_LOCATION.
-
-            if (context.checkPermission(Manifest.permission.ACCESS_COARSE_LOCATION, pid, uid) ==
-                    PackageManager.PERMISSION_DENIED) {
-                return false;
-            }
-            final int opCode = AppOpsManager.permissionToOpCode(
-                    Manifest.permission.ACCESS_COARSE_LOCATION);
-            if (opCode != AppOpsManager.OP_NONE && context.getSystemService(AppOpsManager.class)
-                    .noteOpNoThrow(opCode, uid, pkgName) != AppOpsManager.MODE_ALLOWED) {
-                return false;
-            }
-            if (!isLocationModeEnabled(context, UserHandle.getUserId(uid))
-                    && !isLegacyForeground(context, pkgName, uid)) {
-                return false;
-            }
-            // If the user or profile is current, permission is granted.
-            // Otherwise, uid must have INTERACT_ACROSS_USERS_FULL permission.
-            return isCurrentProfile(context, uid) || checkInteractAcrossUsersFull(context);
-        } finally {
-            Trace.endSection();
-        }
-    }
-
-    private static boolean isLocationModeEnabled(@NonNull Context context, @UserIdInt int userId) {
-        int locationMode = Settings.Secure.getIntForUser(context.getContentResolver(),
-                Settings.Secure.LOCATION_MODE, Settings.Secure.LOCATION_MODE_OFF, userId);
-        return locationMode != Settings.Secure.LOCATION_MODE_OFF
-                && locationMode != Settings.Secure.LOCATION_MODE_SENSORS_ONLY;
-    }
-
-    private static boolean isLegacyForeground(@NonNull Context context, @NonNull String pkgName,
-            int uid) {
-        long token = Binder.clearCallingIdentity();
-        try {
-            return isLegacyVersion(context, pkgName) && isForegroundApp(context, uid);
-        } finally {
-            Binder.restoreCallingIdentity(token);
-        }
-    }
-
-    private static boolean isLegacyVersion(@NonNull Context context, @NonNull String pkgName) {
-        try {
-            if (context.getPackageManager().getApplicationInfo(pkgName, 0)
-                    .targetSdkVersion <= Build.VERSION_CODES.O) {
-                return true;
-            }
-        } catch (PackageManager.NameNotFoundException e) {
-            // In case of exception, assume known app (more strict checking)
-            // Note: This case will never happen since checkPackage is
-            // called to verify validity before checking app's version.
-        }
-        return false;
-    }
-
-    private static boolean isForegroundApp(@NonNull Context context, int uid) {
-        final ActivityManager am = context.getSystemService(ActivityManager.class);
-        return am.getUidImportance(uid) <= ActivityManager.RunningAppProcessInfo.IMPORTANCE_VISIBLE;
-    }
-
-    private static boolean checkInteractAcrossUsersFull(@NonNull Context context) {
-        return context.checkCallingOrSelfPermission(
-                android.Manifest.permission.INTERACT_ACROSS_USERS_FULL)
-                == PackageManager.PERMISSION_GRANTED;
-    }
-
-    private static boolean isCurrentProfile(@NonNull Context context, int uid) {
-        long token = Binder.clearCallingIdentity();
-        try {
-            final int currentUser = ActivityManager.getCurrentUser();
-            final int callingUserId = UserHandle.getUserId(uid);
-            if (callingUserId == currentUser) {
-                return true;
-            } else {
-                List<UserInfo> userProfiles = context.getSystemService(
-                        UserManager.class).getProfiles(currentUser);
-                for (UserInfo user : userProfiles) {
-                    if (user.id == callingUserId) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        } finally {
-            Binder.restoreCallingIdentity(token);
-        }
-    }
-}
diff --git a/telephony/java/android/telephony/SubscriptionManager.java b/telephony/java/android/telephony/SubscriptionManager.java
index 137f491b3e09..1fae04b17d03 100644
--- a/telephony/java/android/telephony/SubscriptionManager.java
+++ b/telephony/java/android/telephony/SubscriptionManager.java
@@ -541,9 +541,9 @@ public class SubscriptionManager {
      *                 onSubscriptionsChanged overridden.
      */
     public void addOnSubscriptionsChangedListener(OnSubscriptionsChangedListener listener) {
-        String pkgName = mContext != null ? mContext.getOpPackageName() : "<unknown>";
+        String pkgForDebug = mContext != null ? mContext.getOpPackageName() : "<unknown>";
         if (DBG) {
-            logd("register OnSubscriptionsChangedListener pkgName=" + pkgName
+            logd("register OnSubscriptionsChangedListener pkgForDebug=" + pkgForDebug
                     + " listener=" + listener);
         }
         try {
@@ -552,7 +552,7 @@ public class SubscriptionManager {
             ITelephonyRegistry tr = ITelephonyRegistry.Stub.asInterface(ServiceManager.getService(
                     "telephony.registry"));
             if (tr != null) {
-                tr.addOnSubscriptionsChangedListener(pkgName, listener.callback);
+                tr.addOnSubscriptionsChangedListener(pkgForDebug, listener.callback);
             }
         } catch (RemoteException ex) {
             // Should not happen