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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 
17 package com.android.server.pm;
18 
19 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.ACTION_INSTANT_APP_RESOLUTION_PHASE_ONE;
20 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.ACTION_INSTANT_APP_RESOLUTION_PHASE_TWO;
21 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_INSTANT_APP_LAUNCH_TOKEN;
22 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_INSTANT_APP_RESOLUTION_DELAY_MS;
23 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_INSTANT_APP_RESOLUTION_STATUS;
24 
25 import android.annotation.IntDef;
26 import android.annotation.NonNull;
27 import android.annotation.Nullable;
28 import android.app.ActivityManager;
29 import android.app.PendingIntent;
30 import android.content.ComponentName;
31 import android.content.Context;
32 import android.content.IIntentSender;
33 import android.content.Intent;
34 import android.content.IntentFilter;
35 import android.content.IntentSender;
36 import android.content.pm.ActivityInfo;
37 import android.content.pm.InstantAppRequest;
38 import android.content.pm.AuxiliaryResolveInfo;
39 import android.content.pm.InstantAppIntentFilter;
40 import android.content.pm.InstantAppResolveInfo;
41 import android.content.pm.InstantAppResolveInfo.InstantAppDigest;
42 import android.metrics.LogMaker;
43 import android.os.Binder;
44 import android.os.Build;
45 import android.os.Bundle;
46 import android.os.Handler;
47 import android.os.RemoteException;
48 import android.util.Log;
49 import android.util.Pair;
50 import android.util.Slog;
51 
52 import com.android.internal.logging.MetricsLogger;
53 import com.android.internal.logging.nano.MetricsProto;
54 import com.android.server.pm.EphemeralResolverConnection.ConnectionException;
55 import com.android.server.pm.EphemeralResolverConnection.PhaseTwoCallback;
56 
57 import java.lang.annotation.Retention;
58 import java.lang.annotation.RetentionPolicy;
59 import java.util.ArrayList;
60 import java.util.Arrays;
61 import java.util.List;
62 import java.util.UUID;
63 import java.util.concurrent.TimeoutException;
64 
65 /** @hide */
66 public abstract class InstantAppResolver {
67     private static final boolean DEBUG_EPHEMERAL = Build.IS_DEBUGGABLE;
68     private static final String TAG = "PackageManager";
69 
70     private static final int RESOLUTION_SUCCESS = 0;
71     private static final int RESOLUTION_FAILURE = 1;
72     /** Binding to the external service timed out */
73     private static final int RESOLUTION_BIND_TIMEOUT = 2;
74     /** The call to retrieve an instant application response timed out */
75     private static final int RESOLUTION_CALL_TIMEOUT = 3;
76 
77     @IntDef(flag = true, prefix = { "RESOLUTION_" }, value = {
78             RESOLUTION_SUCCESS,
79             RESOLUTION_FAILURE,
80             RESOLUTION_BIND_TIMEOUT,
81             RESOLUTION_CALL_TIMEOUT,
82     })
83     @Retention(RetentionPolicy.SOURCE)
84     public @interface ResolutionStatus {}
85 
86     private static MetricsLogger sMetricsLogger;
getLogger()87     private static MetricsLogger getLogger() {
88         if (sMetricsLogger == null) {
89             sMetricsLogger = new MetricsLogger();
90         }
91         return sMetricsLogger;
92     }
93 
doInstantAppResolutionPhaseOne(Context context, EphemeralResolverConnection connection, InstantAppRequest requestObj)94     public static AuxiliaryResolveInfo doInstantAppResolutionPhaseOne(Context context,
95             EphemeralResolverConnection connection, InstantAppRequest requestObj) {
96         final long startTime = System.currentTimeMillis();
97         final String token = UUID.randomUUID().toString();
98         if (DEBUG_EPHEMERAL) {
99             Log.d(TAG, "[" + token + "] Phase1; resolving");
100         }
101         final Intent intent = requestObj.origIntent;
102         final InstantAppDigest digest =
103                 new InstantAppDigest(intent.getData().getHost(), 5 /*maxDigests*/);
104         final int[] shaPrefix = digest.getDigestPrefix();
105         AuxiliaryResolveInfo resolveInfo = null;
106         @ResolutionStatus int resolutionStatus = RESOLUTION_SUCCESS;
107         try {
108             final List<InstantAppResolveInfo> instantAppResolveInfoList =
109                     connection.getInstantAppResolveInfoList(shaPrefix, token);
110             if (instantAppResolveInfoList != null && instantAppResolveInfoList.size() > 0) {
111                 resolveInfo = InstantAppResolver.filterInstantAppIntent(
112                         instantAppResolveInfoList, intent, requestObj.resolvedType,
113                         requestObj.userId, intent.getPackage(), digest, token);
114             }
115         } catch (ConnectionException e) {
116             if (e.failure == ConnectionException.FAILURE_BIND) {
117                 resolutionStatus = RESOLUTION_BIND_TIMEOUT;
118             } else if (e.failure == ConnectionException.FAILURE_CALL) {
119                 resolutionStatus = RESOLUTION_CALL_TIMEOUT;
120             } else {
121                 resolutionStatus = RESOLUTION_FAILURE;
122             }
123         }
124         // Only log successful instant application resolution
125         if (resolutionStatus == RESOLUTION_SUCCESS) {
126             logMetrics(ACTION_INSTANT_APP_RESOLUTION_PHASE_ONE, startTime, token,
127                     resolutionStatus);
128         }
129         if (DEBUG_EPHEMERAL && resolveInfo == null) {
130             if (resolutionStatus == RESOLUTION_BIND_TIMEOUT) {
131                 Log.d(TAG, "[" + token + "] Phase1; bind timed out");
132             } else if (resolutionStatus == RESOLUTION_CALL_TIMEOUT) {
133                 Log.d(TAG, "[" + token + "] Phase1; call timed out");
134             } else if (resolutionStatus != RESOLUTION_SUCCESS) {
135                 Log.d(TAG, "[" + token + "] Phase1; service connection error");
136             } else {
137                 Log.d(TAG, "[" + token + "] Phase1; No results matched");
138             }
139         }
140         return resolveInfo;
141     }
142 
doInstantAppResolutionPhaseTwo(Context context, EphemeralResolverConnection connection, InstantAppRequest requestObj, ActivityInfo instantAppInstaller, Handler callbackHandler)143     public static void doInstantAppResolutionPhaseTwo(Context context,
144             EphemeralResolverConnection connection, InstantAppRequest requestObj,
145             ActivityInfo instantAppInstaller, Handler callbackHandler) {
146         final long startTime = System.currentTimeMillis();
147         final String token = requestObj.responseObj.token;
148         if (DEBUG_EPHEMERAL) {
149             Log.d(TAG, "[" + token + "] Phase2; resolving");
150         }
151         final Intent intent = requestObj.origIntent;
152         final String hostName = intent.getData().getHost();
153         final InstantAppDigest digest = new InstantAppDigest(hostName, 5 /*maxDigests*/);
154         final int[] shaPrefix = digest.getDigestPrefix();
155 
156         final PhaseTwoCallback callback = new PhaseTwoCallback() {
157             @Override
158             void onPhaseTwoResolved(List<InstantAppResolveInfo> instantAppResolveInfoList,
159                     long startTime) {
160                 final String packageName;
161                 final String splitName;
162                 final int versionCode;
163                 final Intent failureIntent;
164                 if (instantAppResolveInfoList != null && instantAppResolveInfoList.size() > 0) {
165                     final AuxiliaryResolveInfo instantAppIntentInfo =
166                             InstantAppResolver.filterInstantAppIntent(
167                                     instantAppResolveInfoList, intent, null /*resolvedType*/,
168                                     0 /*userId*/, intent.getPackage(), digest, token);
169                     if (instantAppIntentInfo != null
170                             && instantAppIntentInfo.resolveInfo != null) {
171                         packageName = instantAppIntentInfo.resolveInfo.getPackageName();
172                         splitName = instantAppIntentInfo.splitName;
173                         versionCode = instantAppIntentInfo.resolveInfo.getVersionCode();
174                         failureIntent = instantAppIntentInfo.failureIntent;
175                     } else {
176                         packageName = null;
177                         splitName = null;
178                         versionCode = -1;
179                         failureIntent = null;
180                     }
181                 } else {
182                     packageName = null;
183                     splitName = null;
184                     versionCode = -1;
185                     failureIntent = null;
186                 }
187                 final Intent installerIntent = buildEphemeralInstallerIntent(
188                         Intent.ACTION_RESOLVE_INSTANT_APP_PACKAGE,
189                         requestObj.origIntent,
190                         failureIntent,
191                         requestObj.callingPackage,
192                         requestObj.verificationBundle,
193                         requestObj.resolvedType,
194                         requestObj.userId,
195                         packageName,
196                         splitName,
197                         versionCode,
198                         token,
199                         false /*needsPhaseTwo*/);
200                 installerIntent.setComponent(new ComponentName(
201                         instantAppInstaller.packageName, instantAppInstaller.name));
202 
203                 logMetrics(ACTION_INSTANT_APP_RESOLUTION_PHASE_TWO, startTime, token,
204                         packageName != null ? RESOLUTION_SUCCESS : RESOLUTION_FAILURE);
205 
206                 context.startActivity(installerIntent);
207             }
208         };
209         try {
210             connection.getInstantAppIntentFilterList(
211                     shaPrefix, token, hostName, callback, callbackHandler, startTime);
212         } catch (ConnectionException e) {
213             @ResolutionStatus int resolutionStatus = RESOLUTION_FAILURE;
214             if (e.failure == ConnectionException.FAILURE_BIND) {
215                 resolutionStatus = RESOLUTION_BIND_TIMEOUT;
216             }
217             logMetrics(ACTION_INSTANT_APP_RESOLUTION_PHASE_TWO, startTime, token,
218                     resolutionStatus);
219             if (DEBUG_EPHEMERAL) {
220                 if (resolutionStatus == RESOLUTION_BIND_TIMEOUT) {
221                     Log.d(TAG, "[" + token + "] Phase2; bind timed out");
222                 } else {
223                     Log.d(TAG, "[" + token + "] Phase2; service connection error");
224                 }
225             }
226         }
227     }
228 
229     /**
230      * Builds and returns an intent to launch the instant installer.
231      */
buildEphemeralInstallerIntent( @onNull String action, @NonNull Intent origIntent, @NonNull Intent failureIntent, @NonNull String callingPackage, @Nullable Bundle verificationBundle, @NonNull String resolvedType, int userId, @NonNull String instantAppPackageName, @Nullable String instantAppSplitName, int versionCode, @Nullable String token, boolean needsPhaseTwo)232     public static Intent buildEphemeralInstallerIntent(
233             @NonNull String action,
234             @NonNull Intent origIntent,
235             @NonNull Intent failureIntent,
236             @NonNull String callingPackage,
237             @Nullable Bundle verificationBundle,
238             @NonNull String resolvedType,
239             int userId,
240             @NonNull String instantAppPackageName,
241             @Nullable String instantAppSplitName,
242             int versionCode,
243             @Nullable String token,
244             boolean needsPhaseTwo) {
245         // Construct the intent that launches the instant installer
246         int flags = origIntent.getFlags();
247         final Intent intent = new Intent(action);
248         intent.setFlags(flags
249                 | Intent.FLAG_ACTIVITY_NEW_TASK
250                 | Intent.FLAG_ACTIVITY_CLEAR_TASK
251                 | Intent.FLAG_ACTIVITY_NO_HISTORY
252                 | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
253         if (token != null) {
254             intent.putExtra(Intent.EXTRA_EPHEMERAL_TOKEN, token);
255         }
256         if (origIntent.getData() != null) {
257             intent.putExtra(Intent.EXTRA_EPHEMERAL_HOSTNAME, origIntent.getData().getHost());
258         }
259 
260         // We have all of the data we need; just start the installer without a second phase
261         if (!needsPhaseTwo) {
262             // Intent that is launched if the package couldn't be installed for any reason.
263             if (failureIntent != null) {
264                 try {
265                     final IIntentSender failureIntentTarget = ActivityManager.getService()
266                             .getIntentSender(
267                                     ActivityManager.INTENT_SENDER_ACTIVITY, callingPackage,
268                                     null /*token*/, null /*resultWho*/, 1 /*requestCode*/,
269                                     new Intent[] { failureIntent },
270                                     new String[] { resolvedType },
271                                     PendingIntent.FLAG_CANCEL_CURRENT | PendingIntent.FLAG_ONE_SHOT
272                                             | PendingIntent.FLAG_IMMUTABLE,
273                                     null /*bOptions*/, userId);
274                     intent.putExtra(Intent.EXTRA_EPHEMERAL_FAILURE,
275                             new IntentSender(failureIntentTarget));
276                 } catch (RemoteException ignore) { /* ignore; same process */ }
277             }
278 
279             // Intent that is launched if the package was installed successfully.
280             final Intent successIntent = new Intent(origIntent);
281             successIntent.setLaunchToken(token);
282             try {
283                 final IIntentSender successIntentTarget = ActivityManager.getService()
284                         .getIntentSender(
285                                 ActivityManager.INTENT_SENDER_ACTIVITY, callingPackage,
286                                 null /*token*/, null /*resultWho*/, 0 /*requestCode*/,
287                                 new Intent[] { successIntent },
288                                 new String[] { resolvedType },
289                                 PendingIntent.FLAG_CANCEL_CURRENT | PendingIntent.FLAG_ONE_SHOT
290                                         | PendingIntent.FLAG_IMMUTABLE,
291                                 null /*bOptions*/, userId);
292                 intent.putExtra(Intent.EXTRA_EPHEMERAL_SUCCESS,
293                         new IntentSender(successIntentTarget));
294             } catch (RemoteException ignore) { /* ignore; same process */ }
295 
296             intent.putExtra(Intent.EXTRA_PACKAGE_NAME, instantAppPackageName);
297             intent.putExtra(Intent.EXTRA_SPLIT_NAME, instantAppSplitName);
298             intent.putExtra(Intent.EXTRA_VERSION_CODE, versionCode);
299             intent.putExtra(Intent.EXTRA_CALLING_PACKAGE, callingPackage);
300             if (verificationBundle != null) {
301                 intent.putExtra(Intent.EXTRA_VERIFICATION_BUNDLE, verificationBundle);
302             }
303         }
304 
305         return intent;
306     }
307 
filterInstantAppIntent( List<InstantAppResolveInfo> instantAppResolveInfoList, Intent origIntent, String resolvedType, int userId, String packageName, InstantAppDigest digest, String token)308     private static AuxiliaryResolveInfo filterInstantAppIntent(
309             List<InstantAppResolveInfo> instantAppResolveInfoList,
310             Intent origIntent, String resolvedType, int userId, String packageName,
311             InstantAppDigest digest, String token) {
312         final int[] shaPrefix = digest.getDigestPrefix();
313         final byte[][] digestBytes = digest.getDigestBytes();
314         final Intent failureIntent = new Intent(origIntent);
315         failureIntent.setFlags(failureIntent.getFlags() | Intent.FLAG_IGNORE_EPHEMERAL);
316         failureIntent.setLaunchToken(token);
317         // Go in reverse order so we match the narrowest scope first.
318         for (int i = shaPrefix.length - 1; i >= 0 ; --i) {
319             for (InstantAppResolveInfo instantAppInfo : instantAppResolveInfoList) {
320                 if (!Arrays.equals(digestBytes[i], instantAppInfo.getDigestBytes())) {
321                     continue;
322                 }
323                 if (packageName != null
324                         && !packageName.equals(instantAppInfo.getPackageName())) {
325                     continue;
326                 }
327                 final List<InstantAppIntentFilter> instantAppFilters =
328                         instantAppInfo.getIntentFilters();
329                 // No filters; we need to start phase two
330                 if (instantAppFilters == null || instantAppFilters.isEmpty()) {
331                     if (DEBUG_EPHEMERAL) {
332                         Log.d(TAG, "No app filters; go to phase 2");
333                     }
334                     return new AuxiliaryResolveInfo(instantAppInfo,
335                             new IntentFilter(Intent.ACTION_VIEW) /*intentFilter*/,
336                             null /*splitName*/, token, true /*needsPhase2*/,
337                             null /*failureIntent*/);
338                 }
339                 // We have a domain match; resolve the filters to see if anything matches.
340                 final PackageManagerService.EphemeralIntentResolver instantAppResolver =
341                         new PackageManagerService.EphemeralIntentResolver();
342                 for (int j = instantAppFilters.size() - 1; j >= 0; --j) {
343                     final InstantAppIntentFilter instantAppFilter = instantAppFilters.get(j);
344                     final List<IntentFilter> splitFilters = instantAppFilter.getFilters();
345                     if (splitFilters == null || splitFilters.isEmpty()) {
346                         continue;
347                     }
348                     for (int k = splitFilters.size() - 1; k >= 0; --k) {
349                         final AuxiliaryResolveInfo intentInfo =
350                                 new AuxiliaryResolveInfo(instantAppInfo,
351                                         splitFilters.get(k), instantAppFilter.getSplitName(),
352                                         token, false /*needsPhase2*/, failureIntent);
353                         instantAppResolver.addFilter(intentInfo);
354                     }
355                 }
356                 List<AuxiliaryResolveInfo> matchedResolveInfoList = instantAppResolver.queryIntent(
357                         origIntent, resolvedType, false /*defaultOnly*/, userId);
358                 if (!matchedResolveInfoList.isEmpty()) {
359                     if (DEBUG_EPHEMERAL) {
360                         final AuxiliaryResolveInfo info = matchedResolveInfoList.get(0);
361                         Log.d(TAG, "[" + token + "] Found match;"
362                                 + " package: " + info.packageName
363                                 + ", split: " + info.splitName
364                                 + ", versionCode: " + info.versionCode);
365                     }
366                     return matchedResolveInfoList.get(0);
367                 } else if (DEBUG_EPHEMERAL) {
368                     Log.d(TAG, "[" + token + "] No matches found"
369                             + " package: " + instantAppInfo.getPackageName()
370                             + ", versionCode: " + instantAppInfo.getVersionCode());
371                 }
372             }
373         }
374         // Hash or filter mis-match; no instant apps for this domain.
375         return null;
376     }
377 
logMetrics(int action, long startTime, String token, @ResolutionStatus int status)378     private static void logMetrics(int action, long startTime, String token,
379             @ResolutionStatus int status) {
380         final LogMaker logMaker = new LogMaker(action)
381                 .setType(MetricsProto.MetricsEvent.TYPE_ACTION)
382                 .addTaggedData(FIELD_INSTANT_APP_RESOLUTION_DELAY_MS,
383                         new Long(System.currentTimeMillis() - startTime))
384                 .addTaggedData(FIELD_INSTANT_APP_LAUNCH_TOKEN, token)
385                 .addTaggedData(FIELD_INSTANT_APP_RESOLUTION_STATUS, new Integer(status));
386         getLogger().write(logMaker);
387     }
388 }
389