| /* |
| * Copyright (C) 2021 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.pm.verify.domain; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.annotation.UserIdInt; |
| import android.content.pm.IntentFilterVerificationInfo; |
| import android.content.pm.PackageManager; |
| import android.util.ArrayMap; |
| import android.util.SparseIntArray; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.modules.utils.TypedXmlPullParser; |
| import com.android.modules.utils.TypedXmlSerializer; |
| import com.android.server.pm.SettingsXml; |
| |
| import org.xmlpull.v1.XmlPullParserException; |
| |
| import java.io.IOException; |
| |
| /** |
| * Reads and writes the old {@link android.content.pm.IntentFilterVerificationInfo} so that it can |
| * be migrated in to the new API. Will throw away the state once it's successfully applied so that |
| * eventually there will be no legacy state on the device. |
| * |
| * This attempt is best effort, and if the legacy state is lost that's acceptable. The user setting |
| * in the legacy API may have been set incorrectly because it was never made obvious to the user |
| * what it actually toggled, so there's a strong argument to prevent migration anyways. The user |
| * can just set their preferences again, this time with finer grained control, if the legacy state |
| * gets dropped. |
| */ |
| public class DomainVerificationLegacySettings { |
| |
| public static final String TAG_DOMAIN_VERIFICATIONS_LEGACY = "domain-verifications-legacy"; |
| public static final String TAG_USER_STATES = "user-states"; |
| public static final String ATTR_PACKAGE_NAME = "packageName"; |
| public static final String TAG_USER_STATE = "user-state"; |
| public static final String ATTR_USER_ID = "userId"; |
| public static final String ATTR_STATE = "state"; |
| |
| @NonNull |
| private final Object mLock = new Object(); |
| |
| @NonNull |
| private final ArrayMap<String, LegacyState> mStates = new ArrayMap<>(); |
| |
| public void add(@NonNull String packageName, @NonNull IntentFilterVerificationInfo info) { |
| synchronized (mLock) { |
| getOrCreateStateLocked(packageName).setInfo(info); |
| } |
| } |
| |
| public void add(@NonNull String packageName, @UserIdInt int userId, int state) { |
| synchronized (mLock) { |
| getOrCreateStateLocked(packageName).addUserState(userId, state); |
| } |
| } |
| |
| public int getUserState(@NonNull String packageName, @UserIdInt int userId) { |
| synchronized (mLock) { |
| LegacyState state = mStates.get(packageName); |
| if (state != null) { |
| return state.getUserState(userId); |
| } |
| } |
| return PackageManager.INTENT_FILTER_DOMAIN_VERIFICATION_STATUS_UNDEFINED; |
| } |
| |
| @Nullable |
| public SparseIntArray getUserStates(@NonNull String packageName) { |
| synchronized (mLock) { |
| LegacyState state = mStates.get(packageName); |
| if (state != null) { |
| // Yes, this returns outside of the lock, but we assume that retrieval generally |
| // only happens after all adding has concluded from reading settings. |
| return state.getUserStates(); |
| } |
| } |
| return null; |
| } |
| |
| @Nullable |
| public IntentFilterVerificationInfo remove(@NonNull String packageName) { |
| synchronized (mLock) { |
| LegacyState state = mStates.get(packageName); |
| if (state != null && !state.isAttached()) { |
| state.markAttached(); |
| return state.getInfo(); |
| } |
| } |
| return null; |
| } |
| |
| @GuardedBy("mLock") |
| @NonNull |
| private LegacyState getOrCreateStateLocked(@NonNull String packageName) { |
| LegacyState state = mStates.get(packageName); |
| if (state == null) { |
| state = new LegacyState(); |
| mStates.put(packageName, state); |
| } |
| |
| return state; |
| } |
| |
| public void writeSettings(TypedXmlSerializer xmlSerializer) throws IOException { |
| try (SettingsXml.Serializer serializer = SettingsXml.serializer(xmlSerializer)) { |
| try (SettingsXml.WriteSection ignored = |
| serializer.startSection(TAG_DOMAIN_VERIFICATIONS_LEGACY)) { |
| synchronized (mLock) { |
| final int statesSize = mStates.size(); |
| for (int stateIndex = 0; stateIndex < statesSize; stateIndex++) { |
| final LegacyState state = mStates.valueAt(stateIndex); |
| final SparseIntArray userStates = state.getUserStates(); |
| if (userStates == null) { |
| continue; |
| } |
| |
| final String packageName = mStates.keyAt(stateIndex); |
| try (SettingsXml.WriteSection userStatesSection = |
| serializer.startSection(TAG_USER_STATES) |
| .attribute(ATTR_PACKAGE_NAME, packageName)) { |
| final int userStatesSize = userStates.size(); |
| for (int userStateIndex = 0; userStateIndex < userStatesSize; |
| userStateIndex++) { |
| final int userId = userStates.keyAt(userStateIndex); |
| final int userState = userStates.valueAt(userStateIndex); |
| userStatesSection.startSection(TAG_USER_STATE) |
| .attribute(ATTR_USER_ID, userId) |
| .attribute(ATTR_STATE, userState) |
| .finish(); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| public void readSettings(TypedXmlPullParser xmlParser) |
| throws IOException, XmlPullParserException { |
| final SettingsXml.ChildSection child = SettingsXml.parser(xmlParser).children(); |
| while (child.moveToNext()) { |
| if (TAG_USER_STATES.equals(child.getName())) { |
| readUserStates(child); |
| } |
| } |
| } |
| |
| private void readUserStates(SettingsXml.ReadSection section) { |
| String packageName = section.getString(ATTR_PACKAGE_NAME); |
| synchronized (mLock) { |
| final LegacyState legacyState = getOrCreateStateLocked(packageName); |
| final SettingsXml.ChildSection child = section.children(); |
| while (child.moveToNext()) { |
| if (TAG_USER_STATE.equals(child.getName())) { |
| readUserState(child, legacyState); |
| } |
| } |
| } |
| } |
| |
| private void readUserState(SettingsXml.ReadSection section, LegacyState legacyState) { |
| int userId = section.getInt(ATTR_USER_ID); |
| int state = section.getInt(ATTR_STATE); |
| legacyState.addUserState(userId, state); |
| } |
| |
| static class LegacyState { |
| @Nullable |
| private IntentFilterVerificationInfo mInfo; |
| |
| @Nullable |
| private SparseIntArray mUserStates; |
| |
| private boolean attached; |
| |
| @Nullable |
| public IntentFilterVerificationInfo getInfo() { |
| return mInfo; |
| } |
| |
| public int getUserState(int userId) { |
| return mUserStates.get(userId, |
| PackageManager.INTENT_FILTER_DOMAIN_VERIFICATION_STATUS_UNDEFINED); |
| } |
| |
| @Nullable |
| public SparseIntArray getUserStates() { |
| return mUserStates; |
| } |
| |
| public void setInfo(@NonNull IntentFilterVerificationInfo info) { |
| mInfo = info; |
| } |
| |
| public void addUserState(@UserIdInt int userId, int state) { |
| if (mUserStates == null) { |
| mUserStates = new SparseIntArray(1); |
| } |
| mUserStates.put(userId, state); |
| } |
| |
| public boolean isAttached() { |
| return attached; |
| } |
| |
| public void markAttached() { |
| attached = true; |
| } |
| } |
| } |