| /* |
| * Copyright (C) 2014 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.providers.telephony; |
| |
| import android.content.ComponentName; |
| import android.content.ContentValues; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.net.Uri; |
| import android.os.Process; |
| import android.provider.Telephony; |
| import android.text.TextUtils; |
| import android.util.Log; |
| |
| import com.android.internal.telephony.SmsApplication; |
| |
| /** |
| * Helpers |
| */ |
| public class ProviderUtil { |
| private final static String TAG = "SmsProvider"; |
| |
| /** |
| * Check if a caller of the provider has restricted access, |
| * i.e. being non-system, non-phone, non-default SMS app |
| * |
| * @param context the context to use |
| * @param packageName the caller package name |
| * @param uid the caller uid |
| * @return true if the caller is not system, or phone or default sms app, false otherwise |
| */ |
| public static boolean isAccessRestricted(Context context, String packageName, int uid) { |
| return (uid != Process.SYSTEM_UID |
| && uid != Process.PHONE_UID |
| && !SmsApplication.isDefaultSmsApplication(context, packageName)); |
| } |
| |
| /** |
| * Whether should set CREATOR for an insertion |
| * |
| * @param values The content of the message |
| * @param uid The caller UID of the insertion |
| * @return true if we should set CREATOR, false otherwise |
| */ |
| public static boolean shouldSetCreator(ContentValues values, int uid) { |
| return (uid != Process.SYSTEM_UID && uid != Process.PHONE_UID) || |
| (!values.containsKey(Telephony.Sms.CREATOR) && |
| !values.containsKey(Telephony.Mms.CREATOR)); |
| } |
| |
| /** |
| * Whether should remove CREATOR for an update |
| * |
| * @param values The content of the message |
| * @param uid The caller UID of the update |
| * @return true if we should remove CREATOR, false otherwise |
| */ |
| public static boolean shouldRemoveCreator(ContentValues values, int uid) { |
| return (uid != Process.SYSTEM_UID && uid != Process.PHONE_UID) && |
| (values.containsKey(Telephony.Sms.CREATOR) || |
| values.containsKey(Telephony.Mms.CREATOR)); |
| } |
| |
| /** |
| * Notify the default SMS app of an SMS/MMS provider change if the change is being made |
| * by a package other than the default SMS app itself. |
| * |
| * @param uri The uri the provider change applies to |
| * @param callingPackage The package name of the provider caller |
| * @param Context |
| */ |
| public static void notifyIfNotDefaultSmsApp(final Uri uri, final String callingPackage, |
| final Context context) { |
| if (TextUtils.equals(callingPackage, Telephony.Sms.getDefaultSmsPackage(context))) { |
| if (Log.isLoggable(TAG, Log.VERBOSE)) { |
| Log.d(TAG, "notifyIfNotDefaultSmsApp - called from default sms app"); |
| } |
| return; |
| } |
| // Direct the intent to only the default SMS app, and only if the SMS app has a receiver |
| // for the intent. |
| ComponentName componentName = |
| SmsApplication.getDefaultExternalTelephonyProviderChangedApplication(context, true); |
| if (componentName == null) { |
| return; // the default sms app doesn't have a receiver for this intent |
| } |
| |
| final Intent intent = |
| new Intent(Telephony.Sms.Intents.ACTION_EXTERNAL_PROVIDER_CHANGE); |
| intent.setFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); |
| intent.setComponent(componentName); |
| if (uri != null) { |
| intent.setData(uri); |
| } |
| if (Log.isLoggable(TAG, Log.VERBOSE)) { |
| Log.d(TAG, "notifyIfNotDefaultSmsApp - called from " + callingPackage + ", notifying"); |
| } |
| context.sendBroadcast(intent); |
| } |
| |
| public static Context getCredentialEncryptedContext(Context context) { |
| if (context.isCredentialProtectedStorage()) { |
| return context; |
| } |
| return context.createCredentialProtectedStorageContext(); |
| } |
| |
| public static Context getDeviceEncryptedContext(Context context) { |
| if (context.isDeviceProtectedStorage()) { |
| return context; |
| } |
| return context.createDeviceProtectedStorageContext(); |
| } |
| } |