Snap for 6131310 from ddb62c707a0be7353e5d5c14d40cd2b83e10638a to qt-aml-media-release
Change-Id: I4a1142c12b7bc5b9879efe7169beecd4194d1571
diff --git a/src/com/android/providers/telephony/MmsSmsProvider.java b/src/com/android/providers/telephony/MmsSmsProvider.java
index 8c3555c..dbf85ae 100644
--- a/src/com/android/providers/telephony/MmsSmsProvider.java
+++ b/src/com/android/providers/telephony/MmsSmsProvider.java
@@ -332,6 +332,16 @@
final String pduTable = MmsProvider.getPduTable(accessRestricted);
final String smsTable = SmsProvider.getSmsTable(accessRestricted);
+ // If access is restricted, we don't allow subqueries in the query.
+ if (accessRestricted) {
+ try {
+ SqlQueryChecker.checkQueryParametersForSubqueries(projection, selection, sortOrder);
+ } catch (IllegalArgumentException e) {
+ Log.w(LOG_TAG, "Query rejected: " + e.getMessage());
+ return null;
+ }
+ }
+
SQLiteDatabase db = mOpenHelper.getReadableDatabase();
Cursor cursor = null;
final int match = URI_MATCHER.match(uri);
diff --git a/src/com/android/providers/telephony/SQLiteTokenizer.java b/src/com/android/providers/telephony/SQLiteTokenizer.java
new file mode 100644
index 0000000..39749fb
--- /dev/null
+++ b/src/com/android/providers/telephony/SQLiteTokenizer.java
@@ -0,0 +1,297 @@
+/*
+ * Copyright (C) 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;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.function.Consumer;
+
+/**
+ * Copied from frameworks/base/core/java/android/database/sqlite/SQLiteTokenizer.java
+ *
+ * SQL Tokenizer specialized to extract tokens from SQL (snippets).
+ * <p>
+ * Based on sqlite3GetToken() in tokenzie.c in SQLite.
+ * <p>
+ * Source for v3.8.6 (which android uses): http://www.sqlite.org/src/artifact/ae45399d6252b4d7
+ * (Latest source as of now: http://www.sqlite.org/src/artifact/78c8085bc7af1922)
+ * <p>
+ * Also draft spec: http://www.sqlite.org/draft/tokenreq.html
+ */
+public class SQLiteTokenizer {
+ private static boolean isAlpha(char ch) {
+ return ('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z') || (ch == '_');
+ }
+
+ private static boolean isNum(char ch) {
+ return ('0' <= ch && ch <= '9');
+ }
+
+ private static boolean isAlNum(char ch) {
+ return isAlpha(ch) || isNum(ch);
+ }
+
+ private static boolean isAnyOf(char ch, String set) {
+ return set.indexOf(ch) >= 0;
+ }
+
+ private static IllegalArgumentException genException(String message, String sql) {
+ throw new IllegalArgumentException(message + " in '" + sql + "'");
+ }
+
+ private static char peek(String s, int index) {
+ return index < s.length() ? s.charAt(index) : '\0';
+ }
+
+ public static final int OPTION_NONE = 0;
+
+ /**
+ * Require that SQL contains only tokens; any comments or values will result
+ * in an exception.
+ */
+ public static final int OPTION_TOKEN_ONLY = 1 << 0;
+
+ /**
+ * Tokenize the given SQL, returning the list of each encountered token.
+ *
+ * @throws IllegalArgumentException if invalid SQL is encountered.
+ */
+ public static List<String> tokenize(@Nullable String sql, int options) {
+ final ArrayList<String> res = new ArrayList<>();
+ tokenize(sql, options, res::add);
+ return res;
+ }
+
+ /**
+ * Tokenize the given SQL, sending each encountered token to the given
+ * {@link Consumer}.
+ *
+ * @throws IllegalArgumentException if invalid SQL is encountered.
+ */
+ public static void tokenize(@Nullable String sql, int options, Consumer<String> checker) {
+ if (sql == null) {
+ return;
+ }
+ int pos = 0;
+ final int len = sql.length();
+ while (pos < len) {
+ final char ch = peek(sql, pos);
+
+ // Regular token.
+ if (isAlpha(ch)) {
+ final int start = pos;
+ pos++;
+ while (isAlNum(peek(sql, pos))) {
+ pos++;
+ }
+ final int end = pos;
+
+ final String token = sql.substring(start, end);
+ checker.accept(token);
+
+ continue;
+ }
+
+ // Handle quoted tokens
+ if (isAnyOf(ch, "'\"`")) {
+ final int quoteStart = pos;
+ pos++;
+
+ for (;;) {
+ pos = sql.indexOf(ch, pos);
+ if (pos < 0) {
+ throw genException("Unterminated quote", sql);
+ }
+ if (peek(sql, pos + 1) != ch) {
+ break;
+ }
+ // Quoted quote char -- e.g. "abc""def" is a single string.
+ pos += 2;
+ }
+ final int quoteEnd = pos;
+ pos++;
+
+ if (ch != '\'') {
+ // Extract the token
+ final String tokenUnquoted = sql.substring(quoteStart + 1, quoteEnd);
+
+ final String token;
+
+ // Unquote if needed. i.e. "aa""bb" -> aa"bb
+ if (tokenUnquoted.indexOf(ch) >= 0) {
+ token = tokenUnquoted.replaceAll(
+ String.valueOf(ch) + ch, String.valueOf(ch));
+ } else {
+ token = tokenUnquoted;
+ }
+ checker.accept(token);
+ } else {
+ if ((options &= OPTION_TOKEN_ONLY) != 0) {
+ throw genException("Non-token detected", sql);
+ }
+ }
+ continue;
+ }
+ // Handle tokens enclosed in [...]
+ if (ch == '[') {
+ final int quoteStart = pos;
+ pos++;
+
+ pos = sql.indexOf(']', pos);
+ if (pos < 0) {
+ throw genException("Unterminated quote", sql);
+ }
+ final int quoteEnd = pos;
+ pos++;
+
+ final String token = sql.substring(quoteStart + 1, quoteEnd);
+
+ checker.accept(token);
+ continue;
+ }
+ if ((options &= OPTION_TOKEN_ONLY) != 0) {
+ throw genException("Non-token detected", sql);
+ }
+
+ // Detect comments.
+ if (ch == '-' && peek(sql, pos + 1) == '-') {
+ pos += 2;
+ pos = sql.indexOf('\n', pos);
+ if (pos < 0) {
+ // We disallow strings ending in an inline comment.
+ throw genException("Unterminated comment", sql);
+ }
+ pos++;
+
+ continue;
+ }
+ if (ch == '/' && peek(sql, pos + 1) == '*') {
+ pos += 2;
+ pos = sql.indexOf("*/", pos);
+ if (pos < 0) {
+ throw genException("Unterminated comment", sql);
+ }
+ pos += 2;
+
+ continue;
+ }
+
+ // Semicolon is never allowed.
+ if (ch == ';') {
+ throw genException("Semicolon is not allowed", sql);
+ }
+
+ // For this purpose, we can simply ignore other characters.
+ // (Note it doesn't handle the X'' literal properly and reports this X as a token,
+ // but that should be fine...)
+ pos++;
+ }
+ }
+
+ /**
+ * Test if given token is a
+ * <a href="https://www.sqlite.org/lang_keywords.html">SQLite reserved
+ * keyword</a>.
+ */
+ public static boolean isKeyword(@NonNull String token) {
+ switch (token.toUpperCase(Locale.US)) {
+ case "ABORT": case "ACTION": case "ADD": case "AFTER":
+ case "ALL": case "ALTER": case "ANALYZE": case "AND":
+ case "AS": case "ASC": case "ATTACH": case "AUTOINCREMENT":
+ case "BEFORE": case "BEGIN": case "BETWEEN": case "BINARY":
+ case "BY": case "CASCADE": case "CASE": case "CAST":
+ case "CHECK": case "COLLATE": case "COLUMN": case "COMMIT":
+ case "CONFLICT": case "CONSTRAINT": case "CREATE": case "CROSS":
+ case "CURRENT": case "CURRENT_DATE": case "CURRENT_TIME": case "CURRENT_TIMESTAMP":
+ case "DATABASE": case "DEFAULT": case "DEFERRABLE": case "DEFERRED":
+ case "DELETE": case "DESC": case "DETACH": case "DISTINCT":
+ case "DO": case "DROP": case "EACH": case "ELSE":
+ case "END": case "ESCAPE": case "EXCEPT": case "EXCLUDE":
+ case "EXCLUSIVE": case "EXISTS": case "EXPLAIN": case "FAIL":
+ case "FILTER": case "FOLLOWING": case "FOR": case "FOREIGN":
+ case "FROM": case "FULL": case "GLOB": case "GROUP":
+ case "GROUPS": case "HAVING": case "IF": case "IGNORE":
+ case "IMMEDIATE": case "IN": case "INDEX": case "INDEXED":
+ case "INITIALLY": case "INNER": case "INSERT": case "INSTEAD":
+ case "INTERSECT": case "INTO": case "IS": case "ISNULL":
+ case "JOIN": case "KEY": case "LEFT": case "LIKE":
+ case "LIMIT": case "MATCH": case "NATURAL": case "NO":
+ case "NOCASE": case "NOT": case "NOTHING": case "NOTNULL":
+ case "NULL": case "OF": case "OFFSET": case "ON":
+ case "OR": case "ORDER": case "OTHERS": case "OUTER":
+ case "OVER": case "PARTITION": case "PLAN": case "PRAGMA":
+ case "PRECEDING": case "PRIMARY": case "QUERY": case "RAISE":
+ case "RANGE": case "RECURSIVE": case "REFERENCES": case "REGEXP":
+ case "REINDEX": case "RELEASE": case "RENAME": case "REPLACE":
+ case "RESTRICT": case "RIGHT": case "ROLLBACK": case "ROW":
+ case "ROWS": case "RTRIM": case "SAVEPOINT": case "SELECT":
+ case "SET": case "TABLE": case "TEMP": case "TEMPORARY":
+ case "THEN": case "TIES": case "TO": case "TRANSACTION":
+ case "TRIGGER": case "UNBOUNDED": case "UNION": case "UNIQUE":
+ case "UPDATE": case "USING": case "VACUUM": case "VALUES":
+ case "VIEW": case "VIRTUAL": case "WHEN": case "WHERE":
+ case "WINDOW": case "WITH": case "WITHOUT":
+ return true;
+ default:
+ return false;
+ }
+ }
+
+ /**
+ * Test if given token is a
+ * <a href="https://www.sqlite.org/lang_corefunc.html">SQLite reserved
+ * function</a>.
+ */
+ public static boolean isFunction(@NonNull String token) {
+ switch (token.toLowerCase(Locale.US)) {
+ case "abs": case "avg": case "char": case "coalesce":
+ case "count": case "glob": case "group_concat": case "hex":
+ case "ifnull": case "instr": case "length": case "like":
+ case "likelihood": case "likely": case "lower": case "ltrim":
+ case "max": case "min": case "nullif": case "random":
+ case "randomblob": case "replace": case "round": case "rtrim":
+ case "substr": case "sum": case "total": case "trim":
+ case "typeof": case "unicode": case "unlikely": case "upper":
+ case "zeroblob":
+ return true;
+ default:
+ return false;
+ }
+ }
+
+ /**
+ * Test if given token is a
+ * <a href="https://www.sqlite.org/datatype3.html">SQLite reserved type</a>.
+ */
+ public static boolean isType(@NonNull String token) {
+ switch (token.toUpperCase(Locale.US)) {
+ case "INT": case "INTEGER": case "TINYINT": case "SMALLINT":
+ case "MEDIUMINT": case "BIGINT": case "INT2": case "INT8":
+ case "CHARACTER": case "VARCHAR": case "NCHAR": case "NVARCHAR":
+ case "TEXT": case "CLOB": case "BLOB": case "REAL":
+ case "DOUBLE": case "FLOAT": case "NUMERIC": case "DECIMAL":
+ case "BOOLEAN": case "DATE": case "DATETIME":
+ return true;
+ default:
+ return false;
+ }
+ }
+}
diff --git a/src/com/android/providers/telephony/SmsProvider.java b/src/com/android/providers/telephony/SmsProvider.java
index e2e6d10..1213c37 100644
--- a/src/com/android/providers/telephony/SmsProvider.java
+++ b/src/com/android/providers/telephony/SmsProvider.java
@@ -122,6 +122,16 @@
final String smsTable = getSmsTable(accessRestricted);
SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
+ // If access is restricted, we don't allow subqueries in the query.
+ if (accessRestricted) {
+ try {
+ SqlQueryChecker.checkQueryParametersForSubqueries(projectionIn, selection, sort);
+ } catch (IllegalArgumentException e) {
+ Log.w(TAG, "Query rejected: " + e.getMessage());
+ return null;
+ }
+ }
+
// Generate the body of the query.
int match = sURLMatcher.match(url);
SQLiteDatabase db = getReadableDatabase(match);
diff --git a/src/com/android/providers/telephony/SqlQueryChecker.java b/src/com/android/providers/telephony/SqlQueryChecker.java
new file mode 100644
index 0000000..a98dd25
--- /dev/null
+++ b/src/com/android/providers/telephony/SqlQueryChecker.java
@@ -0,0 +1,46 @@
+/*
+ * 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);
+ }
+}
