InstantAppResolver.java revision 1fb3404b2ba69a823e961bec2d9ed61622107052 
1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.server.pm;
18
19import android.annotation.NonNull;
20import android.annotation.Nullable;
21import android.app.ActivityManager;
22import android.app.PendingIntent;
23import android.content.ComponentName;
24import android.content.Context;
25import android.content.IIntentSender;
26import android.content.Intent;
27import android.content.IntentFilter;
28import android.content.IntentSender;
29import android.content.pm.ActivityInfo;
30import android.content.pm.InstantAppRequest;
31import android.content.pm.AuxiliaryResolveInfo;
32import android.content.pm.InstantAppIntentFilter;
33import android.content.pm.InstantAppResolveInfo;
34import android.content.pm.InstantAppResolveInfo.InstantAppDigest;
35import android.os.Binder;
36import android.os.Handler;
37import android.os.RemoteException;
38import android.util.Log;
39import android.util.Slog;
40
41import com.android.server.pm.EphemeralResolverConnection.PhaseTwoCallback;
42
43import java.util.ArrayList;
44import java.util.Arrays;
45import java.util.List;
46import java.util.UUID;
47
48/** @hide */
49public abstract class InstantAppResolver {
50    public static AuxiliaryResolveInfo doInstantAppResolutionPhaseOne(Context context,
51            EphemeralResolverConnection connection, InstantAppRequest requestObj) {
52        final Intent intent = requestObj.origIntent;
53        final InstantAppDigest digest =
54                new InstantAppDigest(intent.getData().getHost(), 5 /*maxDigests*/);
55        final int[] shaPrefix = digest.getDigestPrefix();
56        final List<InstantAppResolveInfo> instantAppResolveInfoList =
57                connection.getInstantAppResolveInfoList(shaPrefix);
58        if (instantAppResolveInfoList == null || instantAppResolveInfoList.size() == 0) {
59            // No hash prefix match; there are no instant apps for this domain.
60            return null;
61        }
62
63        final String token = UUID.randomUUID().toString();
64        return InstantAppResolver.filterInstantAppIntent(instantAppResolveInfoList,
65                intent, requestObj.resolvedType, requestObj.userId,
66                intent.getPackage(), digest, token);
67    }
68
69    public static void doInstantAppResolutionPhaseTwo(Context context,
70            EphemeralResolverConnection connection, InstantAppRequest requestObj,
71            ActivityInfo instantAppInstaller, Handler callbackHandler) {
72        final Intent intent = requestObj.origIntent;
73        final String hostName = intent.getData().getHost();
74        final InstantAppDigest digest = new InstantAppDigest(hostName, 5 /*maxDigests*/);
75        final int[] shaPrefix = digest.getDigestPrefix();
76
77        final PhaseTwoCallback callback = new PhaseTwoCallback() {
78            @Override
79            void onPhaseTwoResolved(List<InstantAppResolveInfo> instantAppResolveInfoList,
80                    int sequence) {
81                final String packageName;
82                final String splitName;
83                final int versionCode;
84                if (instantAppResolveInfoList != null && instantAppResolveInfoList.size() > 0) {
85                    final AuxiliaryResolveInfo instantAppIntentInfo =
86                            InstantAppResolver.filterInstantAppIntent(
87                                    instantAppResolveInfoList, intent, null /*resolvedType*/,
88                                    0 /*userId*/, intent.getPackage(), digest,
89                                    requestObj.responseObj.token);
90                    if (instantAppIntentInfo != null
91                            && instantAppIntentInfo.resolveInfo != null) {
92                        packageName = instantAppIntentInfo.resolveInfo.getPackageName();
93                        splitName = instantAppIntentInfo.splitName;
94                        versionCode = instantAppIntentInfo.resolveInfo.getVersionCode();
95                    } else {
96                        packageName = null;
97                        splitName = null;
98                        versionCode = -1;
99                    }
100                } else {
101                    packageName = null;
102                    splitName = null;
103                    versionCode = -1;
104                }
105                final Intent installerIntent = buildEphemeralInstallerIntent(
106                        requestObj.origIntent,
107                        requestObj.callingPackage,
108                        requestObj.resolvedType,
109                        requestObj.userId,
110                        packageName,
111                        splitName,
112                        versionCode,
113                        requestObj.responseObj.token,
114                        false /*needsPhaseTwo*/);
115                installerIntent.setComponent(new ComponentName(
116                        instantAppInstaller.packageName, instantAppInstaller.name));
117                context.startActivity(installerIntent);
118            }
119        };
120        connection.getInstantAppIntentFilterList(
121                shaPrefix, hostName, callback, callbackHandler, 0 /*sequence*/);
122    }
123
124    /**
125     * Builds and returns an intent to launch the instant installer.
126     */
127    public static Intent buildEphemeralInstallerIntent(@NonNull Intent origIntent,
128            @NonNull String callingPackage,
129            @NonNull String resolvedType,
130            int userId,
131            @NonNull String instantAppPackageName,
132            @Nullable String instantAppSplitName,
133            int versionCode,
134            @Nullable String token,
135            boolean needsPhaseTwo) {
136        // Construct the intent that launches the instant installer
137        int flags = origIntent.getFlags();
138        final Intent intent = new Intent();
139        intent.setFlags(flags
140                | Intent.FLAG_ACTIVITY_NEW_TASK
141                | Intent.FLAG_ACTIVITY_CLEAR_TASK
142                | Intent.FLAG_ACTIVITY_NO_HISTORY
143                | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
144        if (token != null) {
145            intent.putExtra(Intent.EXTRA_EPHEMERAL_TOKEN, token);
146        }
147        if (origIntent.getData() != null) {
148            intent.putExtra(Intent.EXTRA_EPHEMERAL_HOSTNAME, origIntent.getData().getHost());
149        }
150
151        // We have all of the data we need; just start the installer without a second phase
152        if (!needsPhaseTwo) {
153            // Intent that is launched if the package couldn't be installed for any reason.
154            final Intent failureIntent = new Intent(origIntent);
155            failureIntent.setFlags(failureIntent.getFlags() | Intent.FLAG_IGNORE_EPHEMERAL);
156            try {
157                final IIntentSender failureIntentTarget = ActivityManager.getService()
158                        .getIntentSender(
159                                ActivityManager.INTENT_SENDER_ACTIVITY, callingPackage,
160                                null /*token*/, null /*resultWho*/, 1 /*requestCode*/,
161                                new Intent[] { failureIntent },
162                                new String[] { resolvedType },
163                                PendingIntent.FLAG_CANCEL_CURRENT | PendingIntent.FLAG_ONE_SHOT
164                                        | PendingIntent.FLAG_IMMUTABLE,
165                                null /*bOptions*/, userId);
166                intent.putExtra(Intent.EXTRA_EPHEMERAL_FAILURE,
167                        new IntentSender(failureIntentTarget));
168            } catch (RemoteException ignore) { /* ignore; same process */ }
169
170            // Intent that is launched if the package was installed successfully.
171            final Intent successIntent = new Intent(origIntent);
172            try {
173                final IIntentSender successIntentTarget = ActivityManager.getService()
174                        .getIntentSender(
175                                ActivityManager.INTENT_SENDER_ACTIVITY, callingPackage,
176                                null /*token*/, null /*resultWho*/, 0 /*requestCode*/,
177                                new Intent[] { successIntent },
178                                new String[] { resolvedType },
179                                PendingIntent.FLAG_CANCEL_CURRENT | PendingIntent.FLAG_ONE_SHOT
180                                        | PendingIntent.FLAG_IMMUTABLE,
181                                null /*bOptions*/, userId);
182                intent.putExtra(Intent.EXTRA_EPHEMERAL_SUCCESS,
183                        new IntentSender(successIntentTarget));
184            } catch (RemoteException ignore) { /* ignore; same process */ }
185
186            intent.putExtra(Intent.EXTRA_PACKAGE_NAME, instantAppPackageName);
187            intent.putExtra(Intent.EXTRA_SPLIT_NAME, instantAppSplitName);
188            intent.putExtra(Intent.EXTRA_VERSION_CODE, versionCode);
189        }
190
191        return intent;
192    }
193
194    private static AuxiliaryResolveInfo filterInstantAppIntent(
195            List<InstantAppResolveInfo> instantAppResolveInfoList,
196            Intent intent, String resolvedType, int userId, String packageName,
197            InstantAppDigest digest, String token) {
198        final int[] shaPrefix = digest.getDigestPrefix();
199        final byte[][] digestBytes = digest.getDigestBytes();
200        // Go in reverse order so we match the narrowest scope first.
201        for (int i = shaPrefix.length - 1; i >= 0 ; --i) {
202            for (InstantAppResolveInfo instantAppInfo : instantAppResolveInfoList) {
203                if (!Arrays.equals(digestBytes[i], instantAppInfo.getDigestBytes())) {
204                    continue;
205                }
206                if (packageName != null
207                        && !packageName.equals(instantAppInfo.getPackageName())) {
208                    continue;
209                }
210                final List<InstantAppIntentFilter> instantAppFilters =
211                        instantAppInfo.getIntentFilters();
212                // No filters; we need to start phase two
213                if (instantAppFilters == null || instantAppFilters.isEmpty()) {
214                    return new AuxiliaryResolveInfo(instantAppInfo,
215                            new IntentFilter(Intent.ACTION_VIEW) /*intentFilter*/,
216                            null /*splitName*/, token, true /*needsPhase2*/);
217                }
218                // We have a domain match; resolve the filters to see if anything matches.
219                final PackageManagerService.EphemeralIntentResolver instantAppResolver =
220                        new PackageManagerService.EphemeralIntentResolver();
221                for (int j = instantAppFilters.size() - 1; j >= 0; --j) {
222                    final InstantAppIntentFilter instantAppFilter = instantAppFilters.get(j);
223                    final List<IntentFilter> splitFilters = instantAppFilter.getFilters();
224                    if (splitFilters == null || splitFilters.isEmpty()) {
225                        continue;
226                    }
227                    for (int k = splitFilters.size() - 1; k >= 0; --k) {
228                        final AuxiliaryResolveInfo intentInfo =
229                                new AuxiliaryResolveInfo(instantAppInfo,
230                                        splitFilters.get(k), instantAppFilter.getSplitName(),
231                                        token, false /*needsPhase2*/);
232                        instantAppResolver.addFilter(intentInfo);
233                    }
234                }
235                List<AuxiliaryResolveInfo> matchedResolveInfoList = instantAppResolver.queryIntent(
236                        intent, resolvedType, false /*defaultOnly*/, userId);
237                if (!matchedResolveInfoList.isEmpty()) {
238                    return matchedResolveInfoList.get(0);
239                }
240            }
241        }
242        // Hash or filter mis-match; no instant apps for this domain.
243        return null;
244    }
245}
246