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558 lines
22 KiB
558 lines
22 KiB
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import dalvik.system.VMRuntime;
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import java.lang.invoke.MethodHandles;
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import java.lang.invoke.MethodType;
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import java.util.function.Consumer;
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public class ChildClass {
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enum PrimitiveType {
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TInteger('I', Integer.TYPE, Integer.valueOf(0)),
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TLong('J', Long.TYPE, Long.valueOf(0)),
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TFloat('F', Float.TYPE, Float.valueOf(0)),
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TDouble('D', Double.TYPE, Double.valueOf(0)),
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TBoolean('Z', Boolean.TYPE, Boolean.valueOf(false)),
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TByte('B', Byte.TYPE, Byte.valueOf((byte) 0)),
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TShort('S', Short.TYPE, Short.valueOf((short) 0)),
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TCharacter('C', Character.TYPE, Character.valueOf('0'));
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PrimitiveType(char shorty, Class klass, Object value) {
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mShorty = shorty;
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mClass = klass;
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mDefaultValue = value;
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}
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public char mShorty;
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public Class mClass;
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public Object mDefaultValue;
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}
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enum Hiddenness {
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Sdk(PrimitiveType.TShort),
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Unsupported(PrimitiveType.TBoolean),
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ConditionallyBlocked(PrimitiveType.TByte),
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Blocklist(PrimitiveType.TCharacter),
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BlocklistAndCorePlatformApi(PrimitiveType.TInteger);
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Hiddenness(PrimitiveType type) { mAssociatedType = type; }
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public PrimitiveType mAssociatedType;
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}
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enum Visibility {
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Public(PrimitiveType.TInteger),
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Package(PrimitiveType.TFloat),
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Protected(PrimitiveType.TLong),
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Private(PrimitiveType.TDouble);
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Visibility(PrimitiveType type) { mAssociatedType = type; }
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public PrimitiveType mAssociatedType;
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}
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enum Behaviour {
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Granted,
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Warning,
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Denied,
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}
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// This needs to be kept in sync with DexDomain in Main.
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enum DexDomain {
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CorePlatform,
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Platform,
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Application
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}
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private static final boolean booleanValues[] = new boolean[] { false, true };
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public static void runTest(String libFileName, int parentDomainOrdinal,
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int childDomainOrdinal, boolean everythingSdked) throws Exception {
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System.load(libFileName);
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parentDomain = DexDomain.values()[parentDomainOrdinal];
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childDomain = DexDomain.values()[childDomainOrdinal];
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configMessage = "parentDomain=" + parentDomain.name() + ", childDomain=" + childDomain.name()
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+ ", everythingSdked=" + everythingSdked;
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// Check expectations about loading into boot class path.
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boolean isParentInBoot = (ParentClass.class.getClassLoader().getParent() == null);
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boolean expectedParentInBoot = (parentDomain != DexDomain.Application);
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if (isParentInBoot != expectedParentInBoot) {
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throw new RuntimeException("Expected ParentClass " +
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(expectedParentInBoot ? "" : "not ") + "in boot class path");
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}
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boolean isChildInBoot = (ChildClass.class.getClassLoader().getParent() == null);
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boolean expectedChildInBoot = (childDomain != DexDomain.Application);
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if (isChildInBoot != expectedChildInBoot) {
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throw new RuntimeException("Expected ChildClass " + (expectedChildInBoot ? "" : "not ") +
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"in boot class path");
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}
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ChildClass.everythingSdked = everythingSdked;
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boolean isSameBoot = (isParentInBoot == isChildInBoot);
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// For compat reasons, meta-reflection should still be usable by apps if hidden api check
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// hardening is disabled (i.e. target SDK is Q or earlier). The only configuration where this
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// workaround used to work is for ChildClass in the Application domain and ParentClass in the
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// Platform domain, so only test that configuration with hidden api check hardening disabled.
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boolean testHiddenApiCheckHardeningDisabled =
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(childDomain == DexDomain.Application) && (parentDomain == DexDomain.Platform);
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// Run meaningful combinations of access flags.
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for (Hiddenness hiddenness : Hiddenness.values()) {
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final Behaviour expected;
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final boolean invokesMemberCallback;
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// Warnings are now disabled whenever access is granted, even for
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// greylisted APIs. This is the behaviour for release builds.
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if (everythingSdked || hiddenness == Hiddenness.Sdk) {
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expected = Behaviour.Granted;
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invokesMemberCallback = false;
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} else if (parentDomain == DexDomain.CorePlatform && childDomain == DexDomain.Platform) {
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expected = (hiddenness == Hiddenness.BlocklistAndCorePlatformApi)
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? Behaviour.Granted : Behaviour.Denied;
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invokesMemberCallback = false;
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} else if (isSameBoot) {
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expected = Behaviour.Granted;
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invokesMemberCallback = false;
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} else if (hiddenness == Hiddenness.Blocklist ||
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hiddenness == Hiddenness.BlocklistAndCorePlatformApi) {
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expected = Behaviour.Denied;
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invokesMemberCallback = true;
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} else {
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expected = Behaviour.Warning;
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invokesMemberCallback = true;
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}
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for (boolean isStatic : booleanValues) {
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String suffix = (isStatic ? "Static" : "") + hiddenness.name();
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for (Visibility visibility : Visibility.values()) {
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// Test reflection and JNI on methods and fields
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for (Class klass : new Class<?>[] { ParentClass.class, ParentInterface.class }) {
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String baseName = visibility.name() + suffix;
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checkField(klass, "field" + baseName, isStatic, visibility, expected,
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invokesMemberCallback, testHiddenApiCheckHardeningDisabled);
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checkMethod(klass, "method" + baseName, isStatic, visibility, expected,
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invokesMemberCallback, testHiddenApiCheckHardeningDisabled);
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}
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// Check whether one can use a class constructor.
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checkConstructor(ParentClass.class, visibility, hiddenness, expected,
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testHiddenApiCheckHardeningDisabled);
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// Check whether one can use an interface default method.
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String name = "method" + visibility.name() + "Default" + hiddenness.name();
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checkMethod(ParentInterface.class, name, /*isStatic*/ false, visibility, expected,
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invokesMemberCallback, testHiddenApiCheckHardeningDisabled);
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}
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// Test whether static linking succeeds.
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checkLinking("LinkFieldGet" + suffix, /*takesParameter*/ false, expected);
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checkLinking("LinkFieldSet" + suffix, /*takesParameter*/ true, expected);
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checkLinking("LinkMethod" + suffix, /*takesParameter*/ false, expected);
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checkLinking("LinkMethodInterface" + suffix, /*takesParameter*/ false, expected);
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}
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// Check whether Class.newInstance succeeds.
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checkNullaryConstructor(Class.forName("NullaryConstructor" + hiddenness.name()), expected);
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}
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}
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static final class RecordingConsumer implements Consumer<String> {
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public String recordedValue = null;
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@Override
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public void accept(String value) {
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recordedValue = value;
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}
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}
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private static void checkMemberCallback(Class<?> klass, String name,
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boolean isPublic, boolean isField, boolean expectedCallback) {
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try {
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RecordingConsumer consumer = new RecordingConsumer();
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VMRuntime.setNonSdkApiUsageConsumer(consumer);
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try {
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if (isPublic) {
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if (isField) {
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klass.getField(name);
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} else {
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klass.getMethod(name);
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}
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} else {
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if (isField) {
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klass.getDeclaredField(name);
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} else {
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klass.getDeclaredMethod(name);
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}
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}
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} catch (NoSuchFieldException|NoSuchMethodException ignored) {
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// We're not concerned whether an exception is thrown or not - we're
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// only interested in whether the callback is invoked.
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}
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boolean actualCallback = consumer.recordedValue != null &&
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consumer.recordedValue.contains(name);
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if (expectedCallback != actualCallback) {
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if (expectedCallback) {
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throw new RuntimeException("Expected callback for member: " + name);
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} else {
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throw new RuntimeException("Did not expect callback for member: " + name);
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}
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}
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} finally {
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VMRuntime.setNonSdkApiUsageConsumer(null);
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}
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}
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private static void checkField(Class<?> klass, String name, boolean isStatic,
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Visibility visibility, Behaviour behaviour, boolean invokesMemberCallback,
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boolean testHiddenApiCheckHardeningDisabled) throws Exception {
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boolean isPublic = (visibility == Visibility.Public);
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boolean canDiscover = (behaviour != Behaviour.Denied);
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if (klass.isInterface() && (!isStatic || !isPublic)) {
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// Interfaces only have public static fields.
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return;
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}
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// Test discovery with reflection.
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if (Reflection.canDiscoverWithGetDeclaredField(klass, name) != canDiscover) {
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throwDiscoveryException(klass, name, true, "getDeclaredField()", canDiscover);
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}
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if (Reflection.canDiscoverWithGetDeclaredFields(klass, name) != canDiscover) {
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throwDiscoveryException(klass, name, true, "getDeclaredFields()", canDiscover);
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}
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if (Reflection.canDiscoverWithGetField(klass, name) != (canDiscover && isPublic)) {
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throwDiscoveryException(klass, name, true, "getField()", (canDiscover && isPublic));
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}
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if (Reflection.canDiscoverWithGetFields(klass, name) != (canDiscover && isPublic)) {
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throwDiscoveryException(klass, name, true, "getFields()", (canDiscover && isPublic));
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}
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// Test discovery with JNI.
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if (JNI.canDiscoverField(klass, name, isStatic) != canDiscover) {
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throwDiscoveryException(klass, name, true, "JNI", canDiscover);
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}
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// Test discovery with MethodHandles.lookup() which is caller
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// context sensitive.
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final MethodHandles.Lookup lookup = MethodHandles.lookup();
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if (JLI.canDiscoverWithLookupFindGetter(lookup, klass, name, int.class)
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!= canDiscover) {
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throwDiscoveryException(klass, name, true, "MethodHandles.lookup().findGetter()",
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canDiscover);
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}
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if (JLI.canDiscoverWithLookupFindStaticGetter(lookup, klass, name, int.class)
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!= canDiscover) {
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throwDiscoveryException(klass, name, true, "MethodHandles.lookup().findStaticGetter()",
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canDiscover);
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}
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// Test discovery with MethodHandles.publicLookup() which can only
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// see public fields. Looking up setters here and fields in
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// interfaces are implicitly final.
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final MethodHandles.Lookup publicLookup = MethodHandles.publicLookup();
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if (JLI.canDiscoverWithLookupFindSetter(publicLookup, klass, name, int.class)
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!= canDiscover) {
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throwDiscoveryException(klass, name, true, "MethodHandles.publicLookup().findSetter()",
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canDiscover);
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}
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if (JLI.canDiscoverWithLookupFindStaticSetter(publicLookup, klass, name, int.class)
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!= canDiscover) {
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throwDiscoveryException(klass, name, true, "MethodHandles.publicLookup().findStaticSetter()",
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canDiscover);
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}
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// Check for meta reflection.
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// With hidden api check hardening enabled, only white and light greylisted fields should be
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// discoverable.
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if (Reflection.canDiscoverFieldWithMetaReflection(klass, name, true) != canDiscover) {
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throwDiscoveryException(klass, name, false,
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"Meta reflection with hidden api hardening enabled", canDiscover);
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}
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if (testHiddenApiCheckHardeningDisabled) {
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// With hidden api check hardening disabled, all fields should be discoverable.
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if (Reflection.canDiscoverFieldWithMetaReflection(klass, name, false) != true) {
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throwDiscoveryException(klass, name, false,
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"Meta reflection with hidden api hardening enabled", canDiscover);
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}
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}
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if (canDiscover) {
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// Test that modifiers are unaffected.
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if (Reflection.canObserveFieldHiddenAccessFlags(klass, name)) {
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throwModifiersException(klass, name, true);
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}
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// Test getters and setters when meaningful.
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if (!Reflection.canGetField(klass, name)) {
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throwAccessException(klass, name, true, "Field.getInt()");
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}
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if (!Reflection.canSetField(klass, name)) {
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throwAccessException(klass, name, true, "Field.setInt()");
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}
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if (!JNI.canGetField(klass, name, isStatic)) {
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throwAccessException(klass, name, true, "getIntField");
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}
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if (!JNI.canSetField(klass, name, isStatic)) {
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throwAccessException(klass, name, true, "setIntField");
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}
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}
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// Test that callbacks are invoked correctly.
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checkMemberCallback(klass, name, isPublic, true /* isField */, invokesMemberCallback);
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}
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private static void checkMethod(Class<?> klass, String name, boolean isStatic,
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Visibility visibility, Behaviour behaviour, boolean invokesMemberCallback,
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boolean testHiddenApiCheckHardeningDisabled) throws Exception {
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boolean isPublic = (visibility == Visibility.Public);
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if (klass.isInterface() && !isPublic) {
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// All interface members are public.
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return;
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}
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boolean canDiscover = (behaviour != Behaviour.Denied);
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// Test discovery with reflection.
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if (Reflection.canDiscoverWithGetDeclaredMethod(klass, name) != canDiscover) {
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throwDiscoveryException(klass, name, false, "getDeclaredMethod()", canDiscover);
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}
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if (Reflection.canDiscoverWithGetDeclaredMethods(klass, name) != canDiscover) {
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throwDiscoveryException(klass, name, false, "getDeclaredMethods()", canDiscover);
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}
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if (Reflection.canDiscoverWithGetMethod(klass, name) != (canDiscover && isPublic)) {
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throwDiscoveryException(klass, name, false, "getMethod()", (canDiscover && isPublic));
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}
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if (Reflection.canDiscoverWithGetMethods(klass, name) != (canDiscover && isPublic)) {
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throwDiscoveryException(klass, name, false, "getMethods()", (canDiscover && isPublic));
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}
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// Test discovery with JNI.
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if (JNI.canDiscoverMethod(klass, name, isStatic) != canDiscover) {
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throwDiscoveryException(klass, name, false, "JNI", canDiscover);
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}
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// Test discovery with MethodHandles.lookup().
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final MethodHandles.Lookup lookup = MethodHandles.lookup();
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final MethodType methodType = MethodType.methodType(int.class);
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if (JLI.canDiscoverWithLookupFindVirtual(lookup, klass, name, methodType) != canDiscover) {
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throwDiscoveryException(klass, name, false, "MethodHandles.lookup().findVirtual()",
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canDiscover);
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}
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if (JLI.canDiscoverWithLookupFindStatic(lookup, klass, name, methodType) != canDiscover) {
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throwDiscoveryException(klass, name, false, "MethodHandles.lookup().findStatic()",
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canDiscover);
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}
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// Check for meta reflection.
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// With hidden api check hardening enabled, only white and light greylisted methods should be
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// discoverable.
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if (Reflection.canDiscoverMethodWithMetaReflection(klass, name, true) != canDiscover) {
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throwDiscoveryException(klass, name, false,
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"Meta reflection with hidden api hardening enabled", canDiscover);
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}
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if (testHiddenApiCheckHardeningDisabled) {
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// With hidden api check hardening disabled, all methods should be discoverable.
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if (Reflection.canDiscoverMethodWithMetaReflection(klass, name, false) != true) {
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throwDiscoveryException(klass, name, false,
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"Meta reflection with hidden api hardening enabled", canDiscover);
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}
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}
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// Finish here if we could not discover the method.
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if (canDiscover) {
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// Test that modifiers are unaffected.
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if (Reflection.canObserveMethodHiddenAccessFlags(klass, name)) {
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throwModifiersException(klass, name, false);
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}
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// Test whether we can invoke the method. This skips non-static interface methods.
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if (!klass.isInterface() || isStatic) {
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if (!Reflection.canInvokeMethod(klass, name)) {
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throwAccessException(klass, name, false, "invoke()");
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}
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if (!JNI.canInvokeMethodA(klass, name, isStatic)) {
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throwAccessException(klass, name, false, "CallMethodA");
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}
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if (!JNI.canInvokeMethodV(klass, name, isStatic)) {
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throwAccessException(klass, name, false, "CallMethodV");
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}
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}
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}
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// Test that callbacks are invoked correctly.
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checkMemberCallback(klass, name, isPublic, false /* isField */, invokesMemberCallback);
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}
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private static void checkConstructor(Class<?> klass, Visibility visibility, Hiddenness hiddenness,
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Behaviour behaviour, boolean testHiddenApiCheckHardeningDisabled) throws Exception {
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boolean isPublic = (visibility == Visibility.Public);
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String signature = "(" + visibility.mAssociatedType.mShorty +
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hiddenness.mAssociatedType.mShorty + ")V";
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String fullName = "<init>" + signature;
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Class<?> args[] = new Class[] { visibility.mAssociatedType.mClass,
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hiddenness.mAssociatedType.mClass };
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Object initargs[] = new Object[] { visibility.mAssociatedType.mDefaultValue,
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hiddenness.mAssociatedType.mDefaultValue };
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MethodType methodType = MethodType.methodType(void.class, args);
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boolean canDiscover = (behaviour != Behaviour.Denied);
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// Test discovery with reflection.
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if (Reflection.canDiscoverWithGetDeclaredConstructor(klass, args) != canDiscover) {
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throwDiscoveryException(klass, fullName, false, "getDeclaredConstructor()", canDiscover);
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}
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if (Reflection.canDiscoverWithGetDeclaredConstructors(klass, args) != canDiscover) {
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throwDiscoveryException(klass, fullName, false, "getDeclaredConstructors()", canDiscover);
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}
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if (Reflection.canDiscoverWithGetConstructor(klass, args) != (canDiscover && isPublic)) {
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throwDiscoveryException(
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klass, fullName, false, "getConstructor()", (canDiscover && isPublic));
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}
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if (Reflection.canDiscoverWithGetConstructors(klass, args) != (canDiscover && isPublic)) {
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throwDiscoveryException(
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klass, fullName, false, "getConstructors()", (canDiscover && isPublic));
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}
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// Test discovery with JNI.
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if (JNI.canDiscoverConstructor(klass, signature) != canDiscover) {
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throwDiscoveryException(klass, fullName, false, "JNI", canDiscover);
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}
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// Test discovery with MethodHandles.lookup()
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final MethodHandles.Lookup lookup = MethodHandles.lookup();
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if (JLI.canDiscoverWithLookupFindConstructor(lookup, klass, methodType) != canDiscover) {
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throwDiscoveryException(klass, fullName, false, "MethodHandles.lookup().findConstructor",
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canDiscover);
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}
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final MethodHandles.Lookup publicLookup = MethodHandles.publicLookup();
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if (JLI.canDiscoverWithLookupFindConstructor(publicLookup, klass, methodType) != canDiscover) {
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throwDiscoveryException(klass, fullName, false,
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"MethodHandles.publicLookup().findConstructor",
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canDiscover);
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}
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// Check for meta reflection.
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// With hidden api check hardening enabled, only white and light greylisted constructors should
|
|
// be discoverable.
|
|
if (Reflection.canDiscoverConstructorWithMetaReflection(klass, args, true) != canDiscover) {
|
|
throwDiscoveryException(klass, fullName, false,
|
|
"Meta reflection with hidden api hardening enabled", canDiscover);
|
|
}
|
|
|
|
if (testHiddenApiCheckHardeningDisabled) {
|
|
// With hidden api check hardening disabled, all constructors should be discoverable.
|
|
if (Reflection.canDiscoverConstructorWithMetaReflection(klass, args, false) != true) {
|
|
throwDiscoveryException(klass, fullName, false,
|
|
"Meta reflection with hidden api hardening enabled", canDiscover);
|
|
}
|
|
}
|
|
|
|
if (canDiscover) {
|
|
// Test whether we can invoke the constructor.
|
|
|
|
if (!Reflection.canInvokeConstructor(klass, args, initargs)) {
|
|
throwAccessException(klass, fullName, false, "invoke()");
|
|
}
|
|
if (!JNI.canInvokeConstructorA(klass, signature)) {
|
|
throwAccessException(klass, fullName, false, "NewObjectA");
|
|
}
|
|
if (!JNI.canInvokeConstructorV(klass, signature)) {
|
|
throwAccessException(klass, fullName, false, "NewObjectV");
|
|
}
|
|
}
|
|
}
|
|
|
|
private static void checkNullaryConstructor(Class<?> klass, Behaviour behaviour)
|
|
throws Exception {
|
|
boolean canAccess = (behaviour != Behaviour.Denied);
|
|
|
|
if (Reflection.canUseNewInstance(klass) != canAccess) {
|
|
throw new RuntimeException("Expected to " + (canAccess ? "" : "not ") +
|
|
"be able to construct " + klass.getName() + ". " + configMessage);
|
|
}
|
|
}
|
|
|
|
private static void checkLinking(String className, boolean takesParameter, Behaviour behaviour)
|
|
throws Exception {
|
|
boolean canAccess = (behaviour != Behaviour.Denied);
|
|
|
|
if (Linking.canAccess(className, takesParameter) != canAccess) {
|
|
throw new RuntimeException("Expected to " + (canAccess ? "" : "not ") +
|
|
"be able to verify " + className + "." + configMessage);
|
|
}
|
|
}
|
|
|
|
private static void throwDiscoveryException(Class<?> klass, String name, boolean isField,
|
|
String fn, boolean canAccess) {
|
|
throw new RuntimeException("Expected " + (isField ? "field " : "method ") + klass.getName() +
|
|
"." + name + " to " + (canAccess ? "" : "not ") + "be discoverable with " + fn + ". " +
|
|
configMessage);
|
|
}
|
|
|
|
private static void throwAccessException(Class<?> klass, String name, boolean isField,
|
|
String fn) {
|
|
throw new RuntimeException("Expected to be able to access " + (isField ? "field " : "method ") +
|
|
klass.getName() + "." + name + " using " + fn + ". " + configMessage);
|
|
}
|
|
|
|
private static void throwModifiersException(Class<?> klass, String name, boolean isField) {
|
|
throw new RuntimeException("Expected " + (isField ? "field " : "method ") + klass.getName() +
|
|
"." + name + " to not expose hidden modifiers");
|
|
}
|
|
|
|
private static DexDomain parentDomain;
|
|
private static DexDomain childDomain;
|
|
private static boolean everythingSdked;
|
|
|
|
private static String configMessage;
|
|
}
|