| /* |
| * 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; |
| |
| import android.annotation.NonNull; |
| import android.text.TextUtils; |
| |
| import com.android.internal.util.HexDump; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| class PerPackageReadTimeouts { |
| static long tryParseLong(String str, long defaultValue) { |
| try { |
| return Long.parseLong(str); |
| } catch (NumberFormatException nfe) { |
| return defaultValue; |
| } |
| } |
| |
| static byte[] tryParseSha256(String str) { |
| if (TextUtils.isEmpty(str)) { |
| return null; |
| } |
| try { |
| return HexDump.hexStringToByteArray(str); |
| } catch (RuntimeException e) { |
| return null; |
| } |
| } |
| |
| static class Timeouts { |
| public final long minTimeUs; |
| public final long minPendingTimeUs; |
| public final long maxPendingTimeUs; |
| |
| // 3600000000us == 1hr |
| public static final Timeouts DEFAULT = new Timeouts(3600000000L, 3600000000L, 3600000000L); |
| |
| private Timeouts(long minTimeUs, long minPendingTimeUs, long maxPendingTimeUs) { |
| this.minTimeUs = minTimeUs; |
| this.minPendingTimeUs = minPendingTimeUs; |
| this.maxPendingTimeUs = maxPendingTimeUs; |
| } |
| |
| static Timeouts parse(String timeouts) { |
| String[] splits = timeouts.split(":", 3); |
| if (splits.length != 3) { |
| return DEFAULT; |
| } |
| final long minTimeUs = tryParseLong(splits[0], DEFAULT.minTimeUs); |
| final long minPendingTimeUs = tryParseLong(splits[1], DEFAULT.minPendingTimeUs); |
| final long maxPendingTimeUs = tryParseLong(splits[2], DEFAULT.maxPendingTimeUs); |
| if (0 <= minTimeUs && minTimeUs <= minPendingTimeUs |
| && minPendingTimeUs <= maxPendingTimeUs) { |
| // validity check |
| return new Timeouts(minTimeUs, minPendingTimeUs, maxPendingTimeUs); |
| } |
| return DEFAULT; |
| } |
| } |
| |
| static class VersionCodes { |
| public final long minVersionCode; |
| public final long maxVersionCode; |
| |
| public static final VersionCodes ALL_VERSION_CODES = new VersionCodes(Long.MIN_VALUE, |
| Long.MAX_VALUE); |
| |
| private VersionCodes(long minVersionCode, long maxVersionCode) { |
| this.minVersionCode = minVersionCode; |
| this.maxVersionCode = maxVersionCode; |
| } |
| |
| static VersionCodes parse(String codes) { |
| if (TextUtils.isEmpty(codes)) { |
| return ALL_VERSION_CODES; |
| } |
| String[] splits = codes.split("-", 2); |
| switch (splits.length) { |
| case 1: { |
| // single version code |
| try { |
| final long versionCode = Long.parseLong(splits[0]); |
| return new VersionCodes(versionCode, versionCode); |
| } catch (NumberFormatException nfe) { |
| return ALL_VERSION_CODES; |
| } |
| } |
| case 2: { |
| final long minVersionCode = tryParseLong(splits[0], |
| ALL_VERSION_CODES.minVersionCode); |
| final long maxVersionCode = tryParseLong(splits[1], |
| ALL_VERSION_CODES.maxVersionCode); |
| if (minVersionCode <= maxVersionCode) { |
| return new VersionCodes(minVersionCode, maxVersionCode); |
| } |
| break; |
| } |
| } |
| return ALL_VERSION_CODES; |
| } |
| } |
| |
| public final String packageName; |
| public final byte[] sha256certificate; |
| public final VersionCodes versionCodes; |
| public final Timeouts timeouts; |
| |
| private PerPackageReadTimeouts(String packageName, byte[] sha256certificate, |
| VersionCodes versionCodes, Timeouts timeouts) { |
| this.packageName = packageName; |
| this.sha256certificate = sha256certificate; |
| this.versionCodes = versionCodes; |
| this.timeouts = timeouts; |
| } |
| |
| @SuppressWarnings("fallthrough") |
| static PerPackageReadTimeouts parse(String timeoutsStr, VersionCodes defaultVersionCodes, |
| Timeouts defaultTimeouts) { |
| String packageName = null; |
| byte[] sha256certificate = null; |
| VersionCodes versionCodes = defaultVersionCodes; |
| Timeouts timeouts = defaultTimeouts; |
| |
| final String[] splits = timeoutsStr.split(":", 4); |
| switch (splits.length) { |
| case 4: |
| timeouts = Timeouts.parse(splits[3]); |
| // fall through |
| case 3: |
| versionCodes = VersionCodes.parse(splits[2]); |
| // fall through |
| case 2: |
| sha256certificate = tryParseSha256(splits[1]); |
| // fall through |
| case 1: |
| packageName = splits[0]; |
| break; |
| default: |
| return null; |
| } |
| if (TextUtils.isEmpty(packageName)) { |
| return null; |
| } |
| |
| return new PerPackageReadTimeouts(packageName, sha256certificate, versionCodes, |
| timeouts); |
| } |
| |
| static @NonNull List<PerPackageReadTimeouts> parseDigestersList(String defaultTimeoutsStr, |
| String knownDigestersList) { |
| if (TextUtils.isEmpty(knownDigestersList)) { |
| return Collections.emptyList(); |
| } |
| |
| final VersionCodes defaultVersionCodes = VersionCodes.ALL_VERSION_CODES; |
| final Timeouts defaultTimeouts = Timeouts.parse(defaultTimeoutsStr); |
| |
| String[] packages = knownDigestersList.split(","); |
| List<PerPackageReadTimeouts> result = new ArrayList<>(packages.length); |
| for (int i = 0, size = packages.length; i < size; ++i) { |
| PerPackageReadTimeouts timeouts = PerPackageReadTimeouts.parse(packages[i], |
| defaultVersionCodes, defaultTimeouts); |
| if (timeouts != null) { |
| result.add(timeouts); |
| } |
| } |
| return result; |
| } |
| } |