Merge "[Mainline] Copy the findBestComponent method from EuiccConnector to Settings"

src/com/android/settings/applications/ApplicationFeatureProviderImpl.java

@@ -16,24 +16,30 @@
 
 package com.android.settings.applications;
 
+import android.Manifest;
 import android.app.admin.DevicePolicyManager;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
+import android.content.pm.ActivityInfo;
 import android.content.pm.ComponentInfo;
 import android.content.pm.IPackageManager;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
+import android.content.pm.ServiceInfo;
 import android.content.pm.UserInfo;
 import android.location.LocationManager;
 import android.os.RemoteException;
 import android.os.UserManager;
+import android.service.euicc.EuiccService;
 import android.telecom.DefaultDialerManager;
 import android.text.TextUtils;
 import android.util.ArraySet;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
 
 import com.android.internal.telephony.SmsApplication;
-import com.android.internal.telephony.euicc.EuiccConnector;
 import com.android.settings.R;
 
 import java.util.ArrayList;
@@ -41,12 +47,17 @@ import java.util.List;
 import java.util.Set;
 
 public class ApplicationFeatureProviderImpl implements ApplicationFeatureProvider {
+    private static final String TAG = "AppFeatureProviderImpl";
 
     protected final Context mContext;
     private final PackageManager mPm;
     private final IPackageManager mPms;
     private final DevicePolicyManager mDpm;
     private final UserManager mUm;
+    /** Flags to use when querying PackageManager for Euicc component implementations. */
+    private static final int EUICC_QUERY_FLAGS =
+            PackageManager.MATCH_SYSTEM_ONLY | PackageManager.MATCH_DEBUG_TRIAGED_MISSING
+                | PackageManager.GET_RESOLVED_FILTER;
 
     public ApplicationFeatureProviderImpl(Context context, PackageManager pm,
             IPackageManager pms, DevicePolicyManager dpm) {
@@ -143,7 +154,7 @@ public class ApplicationFeatureProviderImpl implements ApplicationFeatureProvide
         }
 
         // Keep Euicc Service enabled.
-        final ComponentInfo euicc = EuiccConnector.findBestComponent(mPm);
+        final ComponentInfo euicc = findEuiccService(mPm);
         if (euicc != null) {
             keepEnabledPackages.add(euicc.packageName);
         }
@@ -239,4 +250,89 @@ public class ApplicationFeatureProviderImpl implements ApplicationFeatureProvide
             mCallback.onListOfAppsResult(list);
         }
     }
+
+    /**
+     * Return the component info of the EuiccService to bind to, or null if none were found.
+     */
+    @VisibleForTesting
+    ComponentInfo findEuiccService(PackageManager packageManager) {
+        final Intent intent = new Intent(EuiccService.EUICC_SERVICE_INTERFACE);
+        final List<ResolveInfo> resolveInfoList =
+                packageManager.queryIntentServices(intent, EUICC_QUERY_FLAGS);
+        final ComponentInfo bestComponent = findEuiccService(packageManager, resolveInfoList);
+        if (bestComponent == null) {
+            Log.w(TAG, "No valid EuiccService implementation found");
+        }
+        return bestComponent;
+    }
+
+    private ComponentInfo findEuiccService(
+            PackageManager packageManager, List<ResolveInfo> resolveInfoList) {
+        int bestPriority = Integer.MIN_VALUE;
+        ComponentInfo bestComponent = null;
+        if (resolveInfoList != null) {
+            for (ResolveInfo resolveInfo : resolveInfoList) {
+                if (!isValidEuiccComponent(packageManager, resolveInfo)) {
+                    continue;
+                }
+
+                if (resolveInfo.filter.getPriority() > bestPriority) {
+                    bestPriority = resolveInfo.filter.getPriority();
+                    bestComponent = getComponentInfo(resolveInfo);
+                }
+            }
+        }
+
+        return bestComponent;
+    }
+
+    private boolean isValidEuiccComponent(
+            PackageManager packageManager, ResolveInfo resolveInfo) {
+        final ComponentInfo componentInfo = getComponentInfo(resolveInfo);
+        final String packageName = componentInfo.packageName;
+
+        // Verify that the app is privileged (via granting of a privileged permission).
+        if (packageManager.checkPermission(
+                Manifest.permission.WRITE_EMBEDDED_SUBSCRIPTIONS, packageName)
+                != PackageManager.PERMISSION_GRANTED) {
+            Log.e(TAG, "Package " + packageName
+                    + " does not declare WRITE_EMBEDDED_SUBSCRIPTIONS");
+            return false;
+        }
+
+        // Verify that only the system can access the component.
+        final String permission;
+        if (componentInfo instanceof ServiceInfo) {
+            permission = ((ServiceInfo) componentInfo).permission;
+        } else if (componentInfo instanceof ActivityInfo) {
+            permission = ((ActivityInfo) componentInfo).permission;
+        } else {
+            throw new IllegalArgumentException("Can only verify services/activities");
+        }
+        if (!TextUtils.equals(permission, Manifest.permission.BIND_EUICC_SERVICE)) {
+            Log.e(TAG, "Package " + packageName
+                    + " does not require the BIND_EUICC_SERVICE permission");
+            return false;
+        }
+
+        // Verify that the component declares a priority.
+        if (resolveInfo.filter == null || resolveInfo.filter.getPriority() == 0) {
+            Log.e(TAG, "Package " + packageName + " does not specify a priority");
+            return false;
+        }
+        return true;
+    }
+
+    private ComponentInfo getComponentInfo(ResolveInfo resolveInfo) {
+        if (resolveInfo.activityInfo != null) {
+            return resolveInfo.activityInfo;
+        }
+        if (resolveInfo.serviceInfo != null) {
+            return resolveInfo.serviceInfo;
+        }
+        if (resolveInfo.providerInfo != null) {
+            return resolveInfo.providerInfo;
+        }
+        throw new IllegalStateException("Missing ComponentInfo!");
+    }
 }