| /* |
| * Copyright (C) 2020 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.server.wifi.hotspot2.anqp; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import androidx.test.filters.SmallTest; |
| |
| import com.android.server.wifi.WifiBaseTest; |
| |
| import org.junit.Test; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.net.ProtocolException; |
| import java.net.URL; |
| import java.nio.BufferUnderflowException; |
| import java.nio.ByteBuffer; |
| import java.nio.charset.StandardCharsets; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Unit tests for {@link VenueUrlElement}. |
| */ |
| @SmallTest |
| public class VenueUrlElementTest extends WifiBaseTest { |
| private static final String TEST_VENUE_URL1 = "https://www.google.com/"; |
| private static final String TEST_VENUE_URL2 = "https://www.android.com/"; |
| private static final String TEST_VENUE_URL3 = "https://support.google.com/"; |
| private static final String TEST_VENUE_URL_INSECURE = "http://support.google.com/"; |
| private static final String TEST_VENUE_URL_CAPS = "HTTPS://SUPPORT.GOOGLE.COM/"; |
| private static final String TEST_VENUE_URL_INSECURE_CAPS = "HTTP://SUPPORT.GOOGLE.COM/"; |
| private static final String TEST_VENUE_URL_INVALID = "htps://invalid.com/"; |
| |
| /** |
| * Helper function for appending a Venue URL to an output stream. |
| * |
| * @param stream Stream to write to |
| * @param venueNumber Venue number |
| * @param url The URL string |
| */ |
| private void appendVenue(ByteArrayOutputStream stream, int venueNumber, String url) |
| throws IOException { |
| byte[] venueBytes = url.getBytes(StandardCharsets.UTF_8); |
| int length = venueBytes.length + 1; |
| stream.write((byte) length); |
| stream.write((byte) venueNumber); |
| stream.write(venueBytes); |
| } |
| |
| /** |
| * Helper function for generating test data. |
| * |
| * @return byte[] of data |
| */ |
| private byte[] getTestData(Map<Integer, URL> urls) throws IOException { |
| ByteArrayOutputStream stream = new ByteArrayOutputStream(); |
| |
| for (Map.Entry<Integer, URL> entry : urls.entrySet()) { |
| appendVenue(stream, entry.getKey(), entry.getValue().toString()); |
| } |
| return stream.toByteArray(); |
| } |
| |
| /** |
| * Helper function for generating test data. |
| * |
| * @return byte[] of data |
| */ |
| private byte[] getTestData(int venueNumber, String url) throws IOException { |
| ByteArrayOutputStream stream = new ByteArrayOutputStream(); |
| appendVenue(stream, venueNumber, url); |
| return stream.toByteArray(); |
| } |
| |
| /** |
| * Verify that an empty URL list will be returned when parsing an empty buffer. |
| */ |
| @Test |
| public void parseEmptyBuffer() throws Exception { |
| assertTrue(VenueUrlElement.parse(ByteBuffer.allocate(0)).getVenueUrls().isEmpty()); |
| } |
| |
| /** |
| * Verify that BufferUnderflowException will be thrown when parsing a truncated buffer |
| * (missing a byte at the end). |
| */ |
| @Test(expected = BufferUnderflowException.class) |
| public void parseTruncatedBuffer() throws Exception { |
| Map<Integer, URL> urlList = new HashMap<>(); |
| urlList.put(Integer.valueOf(1), createUrlFromString(TEST_VENUE_URL1)); |
| ByteBuffer buffer = ByteBuffer.wrap(getTestData(urlList)); |
| // Truncate a byte at the end. |
| buffer.limit(buffer.remaining() - 1); |
| VenueUrlElement.parse(buffer); |
| } |
| |
| /** |
| * Verify that ProtocolException is thrown when parsing a buffer with an empty venue URL. |
| */ |
| @Test (expected = ProtocolException.class) |
| public void parseBufferWithEmptyVenueUrl() throws Exception { |
| ByteBuffer buffer = ByteBuffer.wrap(getTestData(1, new String())); |
| VenueUrlElement.parse(buffer); |
| } |
| |
| /** |
| * Verify that ProtocolException is thrown when parsing a buffer with an invalid venue URL. |
| */ |
| @Test (expected = ProtocolException.class) |
| public void parseBufferWithInvalidVenueUrl() throws Exception { |
| ByteBuffer buffer = ByteBuffer.wrap(getTestData(1, TEST_VENUE_URL_INVALID)); |
| VenueUrlElement.parse(buffer); |
| } |
| |
| /** |
| * Verify that BufferUnderflowException is thrown when parsing a buffer with an invalid length. |
| */ |
| @Test (expected = BufferUnderflowException.class) |
| public void parseBufferWithInvalidLength() throws Exception { |
| // Craft a payload with an invalid length that should cause underflow when parsing |
| String url = TEST_VENUE_URL1; |
| ByteArrayOutputStream stream = new ByteArrayOutputStream(); |
| byte[] venueBytes = url.getBytes(StandardCharsets.UTF_8); |
| int length = venueBytes.length + 3; // One extra byte |
| stream.write((byte) length); |
| stream.write((byte) 1 /* venueNumber */); |
| stream.write(venueBytes); |
| VenueUrlElement.parse(ByteBuffer.wrap(stream.toByteArray())); |
| } |
| |
| /** |
| * Verify that a VenueUrlElement with empty URL list will be returned when parsing a buffer |
| * contained venue number equals to 0 and no venue URL (only contained the venue URL data). |
| */ |
| @Test |
| public void parseBufferWithZeroVenueNumber() throws Exception { |
| ByteBuffer buffer = ByteBuffer.wrap(getTestData(0, new String())); |
| assertTrue(VenueUrlElement.parse(buffer).getVenueUrls().isEmpty()); |
| } |
| |
| /** |
| * Verify that a VenueUrlElement with empty URL list will be returned when parsing a buffer |
| * contained venue number equals to 0 and some venue URL (only contained the venue URL data). |
| */ |
| @Test |
| public void parseBufferWithZeroVenueNumberAndUrlData() throws Exception { |
| ByteBuffer buffer = ByteBuffer.wrap(getTestData(0, TEST_VENUE_URL1)); |
| assertTrue(VenueUrlElement.parse(buffer).getVenueUrls().isEmpty()); |
| } |
| |
| /** |
| * Verify that a VenueUrlElement with a single URL will be returned when parsing a buffer |
| * contained a negative venue number and some venue URL. The negative number will be parsed |
| * as a positive number (two's complement). |
| */ |
| @Test |
| public void parseBufferWithNegativeVenueNumberAndUrlData() throws Exception { |
| // Setup expected element. |
| Map<Integer, URL> urlList = new HashMap<>(); |
| urlList.put(Integer.valueOf(249), createUrlFromString(TEST_VENUE_URL1)); |
| VenueUrlElement expectedElement = new VenueUrlElement(urlList); |
| |
| ByteBuffer buffer = ByteBuffer.wrap(getTestData(-7, TEST_VENUE_URL1)); |
| assertEquals(expectedElement, VenueUrlElement.parse(buffer)); |
| } |
| |
| private URL createUrlFromString(String stringUrl) { |
| URL url; |
| try { |
| url = new URL(stringUrl); |
| } catch (java.net.MalformedURLException e) { |
| return null; |
| } |
| return url; |
| } |
| |
| /** |
| * Verify that an expected VenueUrlElement will be returned when parsing a buffer contained |
| * valid Venue URL data. |
| */ |
| @Test |
| public void parseBufferWithValidVenueUrls() throws Exception { |
| // Setup expected element. |
| Map<Integer, URL> urlList = new HashMap<>(); |
| urlList.put(Integer.valueOf(1), createUrlFromString(TEST_VENUE_URL1)); |
| urlList.put(Integer.valueOf(2), createUrlFromString(TEST_VENUE_URL2)); |
| urlList.put(Integer.valueOf(4), createUrlFromString(TEST_VENUE_URL3)); |
| VenueUrlElement expectedElement = new VenueUrlElement(urlList); |
| |
| ByteBuffer buffer = ByteBuffer.wrap(getTestData(urlList)); |
| assertEquals(expectedElement, VenueUrlElement.parse(buffer)); |
| } |
| |
| /** |
| * Verify that an expected VenueUrlElement will be returned when parsing a buffer contained |
| * valid Venue URL data. |
| */ |
| @Test |
| public void parseBufferWithValidVenueUrlsAndCapsUrls() throws Exception { |
| // Setup expected element. |
| Map<Integer, URL> urlList = new HashMap<>(); |
| urlList.put(Integer.valueOf(1), createUrlFromString(TEST_VENUE_URL1)); |
| urlList.put(Integer.valueOf(2), createUrlFromString(TEST_VENUE_URL2)); |
| urlList.put(Integer.valueOf(3), createUrlFromString(TEST_VENUE_URL_CAPS)); |
| urlList.put(Integer.valueOf(4), createUrlFromString(TEST_VENUE_URL3)); |
| VenueUrlElement expectedElement = new VenueUrlElement(urlList); |
| |
| ByteBuffer buffer = ByteBuffer.wrap(getTestData(urlList)); |
| assertEquals(expectedElement, VenueUrlElement.parse(buffer)); |
| } |
| |
| /** |
| * Verify that a VenueUrlElement with empty URL list will be returned when parsing a buffer |
| * with an insecure (Non-HTTPS) URL. |
| */ |
| @Test |
| public void parseBufferWithInsecureUrlData() throws Exception { |
| ByteBuffer buffer = ByteBuffer.wrap(getTestData(1, TEST_VENUE_URL_INSECURE)); |
| assertTrue(VenueUrlElement.parse(buffer).getVenueUrls().isEmpty()); |
| } |
| |
| /** |
| * Verify that a VenueUrlElement with empty URL list will be returned when parsing a buffer |
| * with an insecure (Non-HTTPS) URL (letters capitalized). |
| */ |
| @Test |
| public void parseBufferWithInsecureCapsUrlData() throws Exception { |
| ByteBuffer buffer = ByteBuffer.wrap(getTestData(1, TEST_VENUE_URL_INSECURE_CAPS)); |
| assertTrue(VenueUrlElement.parse(buffer).getVenueUrls().isEmpty()); |
| } |
| |
| /** |
| * Verify that an expected VenueUrlElement will be returned when parsing a buffer contained |
| * valid Venue URL data and a single insecure URL which will be dropped. |
| */ |
| @Test |
| public void parseBufferWithValidVenueUrlsAndOneInsecureUrl() throws Exception { |
| // Setup expected element. |
| Map<Integer, URL> urlList = new HashMap<>(); |
| urlList.put(Integer.valueOf(1), createUrlFromString(TEST_VENUE_URL1)); |
| urlList.put(Integer.valueOf(2), createUrlFromString(TEST_VENUE_URL2)); |
| urlList.put(Integer.valueOf(3), createUrlFromString(TEST_VENUE_URL_INSECURE)); |
| urlList.put(Integer.valueOf(4), createUrlFromString(TEST_VENUE_URL3)); |
| |
| // Create a buffer with a single insecure URL |
| ByteBuffer buffer = ByteBuffer.wrap(getTestData(urlList)); |
| |
| // Create the expected result |
| urlList.remove(Integer.valueOf(3)); |
| VenueUrlElement expectedElement = new VenueUrlElement(urlList); |
| |
| assertEquals(expectedElement, VenueUrlElement.parse(buffer)); |
| } |
| } |