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/*
* Copyright (C) 2009 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.cts.appaccessdata;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import android.test.AndroidTestCase;
/**
* Test that another app's private data cannot be accessed, while its public data can.
*
* Assumes that {@link APP_WITH_DATA_PKG} has already created the private and public data.
*/
public class AccessPrivateDataTest extends AndroidTestCase {
/**
* The Android package name of the application that owns the data
*/
private static final String APP_WITH_DATA_PKG = "com.android.cts.appwithdata";
/**
* Name of private file to access. This must match the name of the file created by
* {@link APP_WITH_DATA_PKG}.
*/
private static final String PRIVATE_FILE_NAME = "private_file.txt";
/**
* Name of public file to access. This must match the name of the file created by
* {@link APP_WITH_DATA_PKG}.
*/
private static final String PUBLIC_FILE_NAME = "public_file.txt";
/**
* Tests that another app's private data cannot be accessed. It includes file
* and detailed traffic stats.
* @throws IOException
*/
public void testAccessPrivateData() throws IOException {
try {
// construct the absolute file path to the app's private file
String privateFilePath = String.format("/data/data/%s/%s", APP_WITH_DATA_PKG,
PRIVATE_FILE_NAME);
FileInputStream inputStream = new FileInputStream(privateFilePath);
inputStream.read();
inputStream.close();
fail("Was able to access another app's private data");
} catch (FileNotFoundException e) {
// expected
} catch (SecurityException e) {
// also valid
}
accessPrivateTrafficStats();
}
/**
* Tests that another app's public file can be accessed
* @throws IOException
*/
public void testAccessPublicData() throws IOException {
try {
getOtherAppUid();
} catch (FileNotFoundException e) {
fail("Was not able to access another app's public file: " + e);
} catch (SecurityException e) {
fail("Was not able to access another app's public file: " + e);
}
}
private int getOtherAppUid() throws IOException, FileNotFoundException, SecurityException {
// construct the absolute file path to the other app's public file
String publicFilePath = String.format("/data/data/%s/files/%s", APP_WITH_DATA_PKG,
PUBLIC_FILE_NAME);
DataInputStream inputStream = new DataInputStream(new FileInputStream(publicFilePath));
int otherAppUid = (int)inputStream.readInt();
inputStream.close();
return otherAppUid;
}
private void accessPrivateTrafficStats() throws IOException {
int otherAppUid = -1;
try {
otherAppUid = getOtherAppUid();
} catch (FileNotFoundException e) {
fail("Was not able to access another app's public file: " + e);
} catch (SecurityException e) {
fail("Was not able to access another app's public file: " + e);
}
boolean foundOtherStats = false;
try {
BufferedReader qtaguidReader = new BufferedReader(new FileReader("/proc/net/xt_qtaguid/stats"));
String line;
while ((line = qtaguidReader.readLine()) != null) {
String tokens[] = line.split(" ");
if (tokens.length > 3 && tokens[3].equals(String.valueOf(otherAppUid))) {
foundOtherStats = true;
if (!tokens[2].equals("0x0")) {
fail("Other apps detailed traffic stats leaked");
}
}
}
qtaguidReader.close();
} catch (FileNotFoundException e) {
fail("Was not able to access qtaguid/stats: " + e);
}
assertTrue("Was expecting to find other apps' traffic stats", foundOtherStats);
}
}
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