| /* |
| * Copyright 2019 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; |
| |
| public class SqlQueryChecker { |
| private static final String SELECT_TOKEN = "select"; |
| |
| static void checkToken(String token) { |
| if (SELECT_TOKEN.equals(token.toLowerCase())) { |
| throw new IllegalArgumentException("SELECT token not allowed in query"); |
| } |
| } |
| |
| /** |
| * Check the query parameters to see if they contain subqueries. Throws an |
| * {@link IllegalArgumentException} if they do. See |
| * {@link android.content.ContentProvider#query} for the definitions of the arguments. |
| */ |
| static void checkQueryParametersForSubqueries(String[] projection, |
| String selection, String sortOrder) { |
| if (projection != null) { |
| for (String proj : projection) { |
| SQLiteTokenizer.tokenize(proj, SQLiteTokenizer.OPTION_NONE, |
| SqlQueryChecker::checkToken); |
| } |
| } |
| SQLiteTokenizer.tokenize(selection, SQLiteTokenizer.OPTION_NONE, |
| SqlQueryChecker::checkToken); |
| SQLiteTokenizer.tokenize(sortOrder, SQLiteTokenizer.OPTION_NONE, |
| SqlQueryChecker::checkToken); |
| } |
| } |