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 static com.android.internal.logging.nano.MetricsProto.MetricsEvent.ACTION_INSTANT_APP_RESOLUTION_PHASE_ONE;
20import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.ACTION_INSTANT_APP_RESOLUTION_PHASE_TWO;
21import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_INSTANT_APP_LAUNCH_TOKEN;
22import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_INSTANT_APP_RESOLUTION_DELAY_MS;
23import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_INSTANT_APP_RESOLUTION_STATUS;
24
25import android.annotation.IntDef;
26import android.annotation.NonNull;
27import android.annotation.Nullable;
28import android.app.ActivityManager;
29import android.app.PendingIntent;
30import android.content.ComponentName;
31import android.content.Context;
32import android.content.IIntentSender;
33import android.content.Intent;
34import android.content.IntentFilter;
35import android.content.IntentSender;
36import android.content.pm.ActivityInfo;
37import android.content.pm.InstantAppRequest;
38import android.content.pm.AuxiliaryResolveInfo;
39import android.content.pm.InstantAppIntentFilter;
40import android.content.pm.InstantAppResolveInfo;
41import android.content.pm.InstantAppResolveInfo.InstantAppDigest;
42import android.metrics.LogMaker;
43import android.os.Binder;
44import android.os.Build;
45import android.os.Bundle;
46import android.os.Handler;
47import android.os.RemoteException;
48import android.util.Log;
49import android.util.Pair;
50import android.util.Slog;
51
52import com.android.internal.logging.MetricsLogger;
53import com.android.internal.logging.nano.MetricsProto;
54import com.android.server.pm.EphemeralResolverConnection.ConnectionException;
55import com.android.server.pm.EphemeralResolverConnection.PhaseTwoCallback;
56
57import java.lang.annotation.Retention;
58import java.lang.annotation.RetentionPolicy;
59import java.util.ArrayList;
60import java.util.Arrays;
61import java.util.List;
62import java.util.UUID;
63import java.util.concurrent.TimeoutException;
64
65/** @hide */
66public 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;
87    private static MetricsLogger getLogger() {
88        if (sMetricsLogger == null) {
89            sMetricsLogger = new MetricsLogger();
90        }
91        return sMetricsLogger;
92    }
93
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 (requestObj.resolveForStart && 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
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                        requestObj.responseObj.installFailureActivity,
198                        versionCode,
199                        token,
200                        false /*needsPhaseTwo*/);
201                installerIntent.setComponent(new ComponentName(
202                        instantAppInstaller.packageName, instantAppInstaller.name));
203
204                logMetrics(ACTION_INSTANT_APP_RESOLUTION_PHASE_TWO, startTime, token,
205                        packageName != null ? RESOLUTION_SUCCESS : RESOLUTION_FAILURE);
206
207                context.startActivity(installerIntent);
208            }
209        };
210        try {
211            connection.getInstantAppIntentFilterList(
212                    shaPrefix, token, hostName, callback, callbackHandler, startTime);
213        } catch (ConnectionException e) {
214            @ResolutionStatus int resolutionStatus = RESOLUTION_FAILURE;
215            if (e.failure == ConnectionException.FAILURE_BIND) {
216                resolutionStatus = RESOLUTION_BIND_TIMEOUT;
217            }
218            logMetrics(ACTION_INSTANT_APP_RESOLUTION_PHASE_TWO, startTime, token,
219                    resolutionStatus);
220            if (DEBUG_EPHEMERAL) {
221                if (resolutionStatus == RESOLUTION_BIND_TIMEOUT) {
222                    Log.d(TAG, "[" + token + "] Phase2; bind timed out");
223                } else {
224                    Log.d(TAG, "[" + token + "] Phase2; service connection error");
225                }
226            }
227        }
228    }
229
230    /**
231     * Builds and returns an intent to launch the instant installer.
232     */
233    public static Intent buildEphemeralInstallerIntent(
234            @NonNull String action,
235            @NonNull Intent origIntent,
236            @NonNull Intent failureIntent,
237            @NonNull String callingPackage,
238            @Nullable Bundle verificationBundle,
239            @NonNull String resolvedType,
240            int userId,
241            @NonNull String instantAppPackageName,
242            @Nullable String instantAppSplitName,
243            @Nullable ComponentName installFailureActivity,
244            int versionCode,
245            @Nullable String token,
246            boolean needsPhaseTwo) {
247        // Construct the intent that launches the instant installer
248        int flags = origIntent.getFlags();
249        final Intent intent = new Intent(action);
250        intent.setFlags(flags
251                | Intent.FLAG_ACTIVITY_NEW_TASK
252                | Intent.FLAG_ACTIVITY_CLEAR_TASK
253                | Intent.FLAG_ACTIVITY_NO_HISTORY
254                | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
255        if (token != null) {
256            intent.putExtra(Intent.EXTRA_EPHEMERAL_TOKEN, token);
257        }
258        if (origIntent.getData() != null) {
259            intent.putExtra(Intent.EXTRA_EPHEMERAL_HOSTNAME, origIntent.getData().getHost());
260        }
261
262        // We have all of the data we need; just start the installer without a second phase
263        if (!needsPhaseTwo) {
264            // Intent that is launched if the package couldn't be installed for any reason.
265            if (failureIntent != null || installFailureActivity != null) {
266                try {
267                    final Intent onFailureIntent;
268                    if (installFailureActivity != null) {
269                        onFailureIntent = new Intent();
270                        onFailureIntent.setComponent(installFailureActivity);
271                        onFailureIntent.putExtra(Intent.EXTRA_SPLIT_NAME, instantAppSplitName);
272                        onFailureIntent.putExtra(Intent.EXTRA_INTENT, origIntent);
273                    } else {
274                        onFailureIntent = failureIntent;
275                    }
276                    final IIntentSender failureIntentTarget = ActivityManager.getService()
277                            .getIntentSender(
278                                    ActivityManager.INTENT_SENDER_ACTIVITY, callingPackage,
279                                    null /*token*/, null /*resultWho*/, 1 /*requestCode*/,
280                                    new Intent[] { onFailureIntent },
281                                    new String[] { resolvedType },
282                                    PendingIntent.FLAG_CANCEL_CURRENT
283                                            | PendingIntent.FLAG_ONE_SHOT
284                                            | PendingIntent.FLAG_IMMUTABLE,
285                                    null /*bOptions*/, userId);
286                    intent.putExtra(Intent.EXTRA_EPHEMERAL_FAILURE,
287                            new IntentSender(failureIntentTarget));
288                } catch (RemoteException ignore) { /* ignore; same process */ }
289            }
290
291            // Intent that is launched if the package was installed successfully.
292            final Intent successIntent = new Intent(origIntent);
293            successIntent.setLaunchToken(token);
294            try {
295                final IIntentSender successIntentTarget = ActivityManager.getService()
296                        .getIntentSender(
297                                ActivityManager.INTENT_SENDER_ACTIVITY, callingPackage,
298                                null /*token*/, null /*resultWho*/, 0 /*requestCode*/,
299                                new Intent[] { successIntent },
300                                new String[] { resolvedType },
301                                PendingIntent.FLAG_CANCEL_CURRENT | PendingIntent.FLAG_ONE_SHOT
302                                        | PendingIntent.FLAG_IMMUTABLE,
303                                null /*bOptions*/, userId);
304                intent.putExtra(Intent.EXTRA_EPHEMERAL_SUCCESS,
305                        new IntentSender(successIntentTarget));
306            } catch (RemoteException ignore) { /* ignore; same process */ }
307
308            intent.putExtra(Intent.EXTRA_PACKAGE_NAME, instantAppPackageName);
309            intent.putExtra(Intent.EXTRA_SPLIT_NAME, instantAppSplitName);
310            intent.putExtra(Intent.EXTRA_VERSION_CODE, versionCode);
311            intent.putExtra(Intent.EXTRA_CALLING_PACKAGE, callingPackage);
312            if (verificationBundle != null) {
313                intent.putExtra(Intent.EXTRA_VERIFICATION_BUNDLE, verificationBundle);
314            }
315        }
316
317        return intent;
318    }
319
320    private static AuxiliaryResolveInfo filterInstantAppIntent(
321            List<InstantAppResolveInfo> instantAppResolveInfoList,
322            Intent origIntent, String resolvedType, int userId, String packageName,
323            InstantAppDigest digest, String token) {
324        final int[] shaPrefix = digest.getDigestPrefix();
325        final byte[][] digestBytes = digest.getDigestBytes();
326        final Intent failureIntent = new Intent(origIntent);
327        failureIntent.setFlags(failureIntent.getFlags() | Intent.FLAG_IGNORE_EPHEMERAL);
328        failureIntent.setLaunchToken(token);
329        // Go in reverse order so we match the narrowest scope first.
330        for (int i = shaPrefix.length - 1; i >= 0 ; --i) {
331            for (InstantAppResolveInfo instantAppInfo : instantAppResolveInfoList) {
332                if (!Arrays.equals(digestBytes[i], instantAppInfo.getDigestBytes())) {
333                    continue;
334                }
335                if (packageName != null
336                        && !packageName.equals(instantAppInfo.getPackageName())) {
337                    continue;
338                }
339                final List<InstantAppIntentFilter> instantAppFilters =
340                        instantAppInfo.getIntentFilters();
341                // No filters; we need to start phase two
342                if (instantAppFilters == null || instantAppFilters.isEmpty()) {
343                    if (DEBUG_EPHEMERAL) {
344                        Log.d(TAG, "No app filters; go to phase 2");
345                    }
346                    return new AuxiliaryResolveInfo(instantAppInfo,
347                            new IntentFilter(Intent.ACTION_VIEW) /*intentFilter*/,
348                            null /*splitName*/, token, true /*needsPhase2*/,
349                            null /*failureIntent*/);
350                }
351                // We have a domain match; resolve the filters to see if anything matches.
352                final PackageManagerService.EphemeralIntentResolver instantAppResolver =
353                        new PackageManagerService.EphemeralIntentResolver();
354                for (int j = instantAppFilters.size() - 1; j >= 0; --j) {
355                    final InstantAppIntentFilter instantAppFilter = instantAppFilters.get(j);
356                    final List<IntentFilter> splitFilters = instantAppFilter.getFilters();
357                    if (splitFilters == null || splitFilters.isEmpty()) {
358                        continue;
359                    }
360                    for (int k = splitFilters.size() - 1; k >= 0; --k) {
361                        final AuxiliaryResolveInfo intentInfo =
362                                new AuxiliaryResolveInfo(instantAppInfo,
363                                        splitFilters.get(k), instantAppFilter.getSplitName(),
364                                        token, false /*needsPhase2*/, failureIntent);
365                        instantAppResolver.addFilter(intentInfo);
366                    }
367                }
368                List<AuxiliaryResolveInfo> matchedResolveInfoList = instantAppResolver.queryIntent(
369                        origIntent, resolvedType, false /*defaultOnly*/, userId);
370                if (!matchedResolveInfoList.isEmpty()) {
371                    if (DEBUG_EPHEMERAL) {
372                        final AuxiliaryResolveInfo info = matchedResolveInfoList.get(0);
373                        Log.d(TAG, "[" + token + "] Found match;"
374                                + " package: " + info.packageName
375                                + ", split: " + info.splitName
376                                + ", versionCode: " + info.versionCode);
377                    }
378                    return matchedResolveInfoList.get(0);
379                } else if (DEBUG_EPHEMERAL) {
380                    Log.d(TAG, "[" + token + "] No matches found"
381                            + " package: " + instantAppInfo.getPackageName()
382                            + ", versionCode: " + instantAppInfo.getVersionCode());
383                }
384            }
385        }
386        // Hash or filter mis-match; no instant apps for this domain.
387        return null;
388    }
389
390    private static void logMetrics(int action, long startTime, String token,
391            @ResolutionStatus int status) {
392        final LogMaker logMaker = new LogMaker(action)
393                .setType(MetricsProto.MetricsEvent.TYPE_ACTION)
394                .addTaggedData(FIELD_INSTANT_APP_RESOLUTION_DELAY_MS,
395                        new Long(System.currentTimeMillis() - startTime))
396                .addTaggedData(FIELD_INSTANT_APP_LAUNCH_TOKEN, token)
397                .addTaggedData(FIELD_INSTANT_APP_RESOLUTION_STATUS, new Integer(status));
398        getLogger().write(logMaker);
399    }
400}
401