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/*
* Copyright (C) 2023 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.net.module.util;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import androidx.test.filters.SmallTest;
import androidx.test.runner.AndroidJUnit4;
import libcore.util.HexEncoding;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.List;
@RunWith(AndroidJUnit4.class)
@SmallTest
public class DomainUtilsTest {
@Test
public void testEncodeInvalidDomain() {
byte[] buffer = DomainUtils.encode(".google.com");
assertNull(buffer);
buffer = DomainUtils.encode("google.com.");
assertNull(buffer);
buffer = DomainUtils.encode("-google.com");
assertNull(buffer);
buffer = DomainUtils.encode("google.com-");
assertNull(buffer);
buffer = DomainUtils.encode("google..com");
assertNull(buffer);
buffer = DomainUtils.encode("google!.com");
assertNull(buffer);
buffer = DomainUtils.encode("google.o");
assertNull(buffer);
buffer = DomainUtils.encode("google,com");
assertNull(buffer);
}
@Test
public void testEncodeValidDomainNamesWithoutCompression() {
// Single domain: "google.com"
String suffix = "06676F6F676C6503636F6D00";
byte[] buffer = DomainUtils.encode("google.com");
//assertNotNull(buffer);
assertEquals(suffix, HexEncoding.encodeToString(buffer));
// Single domain: "google-guest.com"
suffix = "0C676F6F676C652D677565737403636F6D00";
buffer = DomainUtils.encode("google-guest.com");
assertNotNull(buffer);
assertEquals(suffix, HexEncoding.encodeToString(buffer));
// domain search list: "example.corp.google.com", "corp.google.com", "google.com"
suffix = "076578616D706C6504636F727006676F6F676C6503636F6D00" // example.corp.google.com
+ "04636F727006676F6F676C6503636F6D00" // corp.google.com
+ "06676F6F676C6503636F6D00"; // google.com
buffer = DomainUtils.encode(new String[] {
"example.corp.google.com", "corp.google.com", "google.com"},
false /* compression */);
assertNotNull(buffer);
assertEquals(suffix, HexEncoding.encodeToString(buffer));
// domain search list: "example.corp.google.com", "corp..google.com"(invalid domain),
// "google.com"
suffix = "076578616D706C6504636F727006676F6F676C6503636F6D00" // example.corp.google.com
+ "06676F6F676C6503636F6D00"; // google.com
buffer = DomainUtils.encode(new String[] {
"example.corp.google.com", "corp..google.com", "google.com"},
false /* compression */);
assertNotNull(buffer);
assertEquals(suffix, HexEncoding.encodeToString(buffer));
// Invalid domain search list: "corp..google.com", "..google.com"
buffer = DomainUtils.encode(new String[] {"corp..google.com", "..google.com"},
false /* compression */);
assertEquals(0, buffer.length);
}
@Test
public void testEncodeValidDomainNamesWithCompression() {
// domain search list: "example.corp.google.com", "corp.google.com", "google.com"
String suffix =
"076578616D706C6504636F727006676F6F676C6503636F6D00" // example.corp.google.com
+ "C008" // corp.google.com
+ "C00D"; // google.com
byte[] buffer = DomainUtils.encode(new String[] {
"example.corp.google.com", "corp.google.com", "google.com"}, true);
assertNotNull(buffer);
assertEquals(suffix, HexEncoding.encodeToString(buffer));
// domain search list: "example.corp.google.com", "a.example.corp.google.com", "google.com"
suffix = "076578616D706C6504636F727006676F6F676C6503636F6D00" // example.corp.google.com
+ "0161C000" // a.example.corp.google.com
+ "C00D"; // google.com
buffer = DomainUtils.encode(new String[] {
"example.corp.google.com", "a.example.corp.google.com", "google.com"}, true);
assertNotNull(buffer);
assertEquals(suffix, HexEncoding.encodeToString(buffer));
// domain search list: "example.corp.google.com", "google.com", "gle.com"
suffix = "076578616D706C6504636F727006676F6F676C6503636F6D00" // example.corp.google.com
+ "C00D" // google.com
+ "03676C65C014"; // gle.com
buffer = DomainUtils.encode(new String[] {
"example.corp.google.com", "google.com", "gle.com"}, true);
assertNotNull(buffer);
assertEquals(suffix, HexEncoding.encodeToString(buffer));
// domain search list: "example.corp.google.com", "google.com", "google"
suffix = "076578616D706C6504636F727006676F6F676C6503636F6D00" // example.corp.google.com
+ "C00D"; // google.com
buffer = DomainUtils.encode(new String[] {
"example.corp.google.com", "google.com", "google"}, true);
assertNotNull(buffer);
assertEquals(suffix, HexEncoding.encodeToString(buffer));
// domain search list: "example.corp.google.com", "..google.com"(invalid domain), "google"
suffix = "076578616D706C6504636F727006676F6F676C6503636F6D00"; // example.corp.google.com
buffer = DomainUtils.encode(new String[] {
"example.corp.google.com", "..google.com", "google"}, true);
assertNotNull(buffer);
assertEquals(suffix, HexEncoding.encodeToString(buffer));
// domain search list: "example.corp.google.com", "suffix.example.edu.cn", "edu.cn"
suffix = "076578616D706C6504636F727006676F6F676C6503636F6D00" // example.corp.google.com
+ "06737566666978076578616D706C650365647502636E00" // suffix.example.edu.cn
+ "C028"; // edu.cn
buffer = DomainUtils.encode(new String[] {
"example.corp.google.com", "suffix.example.edu.cn", "edu.cn"}, true);
assertNotNull(buffer);
assertEquals(suffix, HexEncoding.encodeToString(buffer));
// domain search list: "google.com", "example.com", "sub.example.com"
suffix = "06676F6F676C6503636F6D00" // google.com
+ "076578616D706C65C007" // example.com
+ "03737562C00C"; // sub.example.com
buffer = DomainUtils.encode(new String[] {
"google.com", "example.com", "sub.example.com"}, true);
assertNotNull(buffer);
assertEquals(suffix, HexEncoding.encodeToString(buffer));
}
@Test
public void testDecodeDomainNames() {
ArrayList<String> suffixStringList;
String suffixes = "06676F6F676C6503636F6D00" // google.com
+ "076578616D706C6503636F6D00" // example.com
+ "06676F6F676C6500"; // google
List<String> expected = Arrays.asList("google.com", "example.com");
ByteBuffer buffer = ByteBuffer.wrap(HexEncoding.decode(suffixes));
suffixStringList = DomainUtils.decode(buffer, false /* compression */);
assertEquals(expected, suffixStringList);
// include suffix with invalid length: 64
suffixes = "06676F6F676C6503636F6D00" // google.com
+ "406578616D706C6503636F6D00" // example.com(length=64)
+ "06676F6F676C6500"; // google
expected = Arrays.asList("google.com");
buffer = ByteBuffer.wrap(HexEncoding.decode(suffixes));
suffixStringList = DomainUtils.decode(buffer, false /* compression */);
assertEquals(expected, suffixStringList);
// include suffix with invalid length: 0
suffixes = "06676F6F676C6503636F6D00" // google.com
+ "076578616D706C6503636F6D00" // example.com
+ "00676F6F676C6500"; // google(length=0)
expected = Arrays.asList("google.com", "example.com");
buffer = ByteBuffer.wrap(HexEncoding.decode(suffixes));
suffixStringList = DomainUtils.decode(buffer, false /* compression */);
assertEquals(expected, suffixStringList);
suffixes =
"076578616D706C6504636F727006676F6F676C6503636F6D00" // example.corp.google.com
+ "C008" // corp.google.com
+ "C00D"; // google.com
expected = Arrays.asList("example.corp.google.com", "corp.google.com", "google.com");
buffer = ByteBuffer.wrap(HexEncoding.decode(suffixes));
suffixStringList = DomainUtils.decode(buffer, true /* compression */);
assertEquals(expected, suffixStringList);
}
}
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