mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
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198 lines
9.4 KiB
Diff
198 lines
9.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Dmitry Muhomor <muhomor.dmitry@gmail.com>
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Date: Mon, 27 Mar 2023 16:00:00 +0300
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Subject: [PATCH] add hooks for modifying PackageManagerService behavior
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---
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.../server/ext/PackageManagerHooks.java | 90 +++++++++++++++++++
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.../com/android/server/pm/AppsFilterBase.java | 6 ++
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.../java/com/android/server/pm/Settings.java | 8 +-
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.../PermissionManagerServiceImpl.java | 13 +++
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4 files changed, 115 insertions(+), 2 deletions(-)
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create mode 100644 services/core/java/com/android/server/ext/PackageManagerHooks.java
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diff --git a/services/core/java/com/android/server/ext/PackageManagerHooks.java b/services/core/java/com/android/server/ext/PackageManagerHooks.java
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new file mode 100644
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index 000000000000..007b65349e55
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--- /dev/null
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+++ b/services/core/java/com/android/server/ext/PackageManagerHooks.java
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@@ -0,0 +1,90 @@
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+package com.android.server.ext;
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+
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+import android.Manifest;
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+import android.annotation.Nullable;
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+import android.annotation.UserIdInt;
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+import android.content.pm.PackageManager;
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+import android.content.pm.PackageManagerInternal;
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+import android.os.Build;
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+import android.os.UserHandle;
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+import android.util.ArraySet;
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+
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+import com.android.server.pm.parsing.pkg.AndroidPackage;
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+import com.android.server.pm.permission.Permission;
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+import com.android.server.pm.pkg.PackageStateInternal;
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+import com.android.server.pm.pkg.parsing.ParsingPackage;
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+
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+public class PackageManagerHooks {
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+
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+ // Called when package enabled setting is deserialized from storage
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+ @Nullable
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+ public static Integer maybeOverridePackageEnabledSetting(String pkgName, @UserIdInt int userId) {
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+ switch (pkgName) {
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+ default:
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+ return null;
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+ }
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+ }
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+
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+ // Called when package parsing is completed
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+ public static void amendParsedPackage(ParsingPackage pkg) {
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+ String pkgName = pkg.getPackageName();
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+
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+ switch (pkgName) {
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+ default:
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+ return;
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+ }
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+ }
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+
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+ public static void removeUsesPermissions(ParsingPackage pkg, String... perms) {
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+ var set = new ArraySet<>(perms);
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+ pkg.getRequestedPermissions().removeAll(set);
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+ pkg.getUsesPermissions().removeIf(p -> set.contains(p.getName()));
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+ }
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+
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+ public static boolean shouldBlockGrantRuntimePermission(
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+ PackageManagerInternal pm, String permName, String packageName, int userId)
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+ {
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+ return false;
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+ }
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+
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+ public static boolean shouldForciblyGrantPermission(AndroidPackage pkg, Permission perm) {
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+ if (!Build.IS_DEBUGGABLE) {
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+ return false;
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+ }
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+
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+ String permName = perm.getName();
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+
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+ switch (pkg.getPackageName()) {
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+ default:
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+ return false;
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+ }
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+ }
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+
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+ // Called when AppsFilter decides whether to restrict package visibility
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+ public static boolean shouldFilterAccess(@Nullable PackageStateInternal callingPkgSetting,
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+ ArraySet<PackageStateInternal> callingSharedPkgSettings,
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+ PackageStateInternal targetPkgSetting) {
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+ if (callingPkgSetting != null && restrictedVisibilityPackages.contains(callingPkgSetting.getPackageName())) {
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+ if (!targetPkgSetting.isSystem()) {
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+ return true;
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+ }
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+ }
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+
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+ if (restrictedVisibilityPackages.contains(targetPkgSetting.getPackageName())) {
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+ if (callingPkgSetting != null) {
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+ return !callingPkgSetting.isSystem();
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+ } else {
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+ for (int i = callingSharedPkgSettings.size() - 1; i >= 0; i--) {
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+ if (!callingSharedPkgSettings.valueAt(i).isSystem()) {
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+ return true;
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+ }
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+ }
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+ }
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+ }
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+ return false;
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+ }
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+
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+ // Packages in this array are restricted from interacting with and being interacted by non-system apps
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+ private static final ArraySet<String> restrictedVisibilityPackages = new ArraySet<>(new String[] {
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+ });
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+}
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diff --git a/services/core/java/com/android/server/pm/AppsFilterBase.java b/services/core/java/com/android/server/pm/AppsFilterBase.java
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index 28942cd262d6..cf8da62167e5 100644
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--- a/services/core/java/com/android/server/pm/AppsFilterBase.java
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+++ b/services/core/java/com/android/server/pm/AppsFilterBase.java
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@@ -40,6 +40,7 @@ import android.util.SparseArray;
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import com.android.internal.annotations.VisibleForTesting;
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import com.android.internal.util.ArrayUtils;
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import com.android.internal.util.function.QuadFunction;
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+import com.android.server.ext.PackageManagerHooks;
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import com.android.server.om.OverlayReferenceMapper;
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import com.android.server.pm.pkg.AndroidPackage;
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import com.android.server.pm.pkg.PackageStateInternal;
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@@ -457,6 +458,11 @@ public abstract class AppsFilterBase implements AppsFilterSnapshot {
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Trace.traceEnd(TRACE_TAG_PACKAGE_MANAGER);
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}
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+ if (PackageManagerHooks.shouldFilterAccess(callingPkgSetting, callingSharedPkgSettings,
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+ targetPkgSetting)) {
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+ return true;
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+ }
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+
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if (callingPkgSetting != null) {
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if (callingPkgSetting.getPkg() != null
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&& !mFeatureConfig.packageIsEnabled(callingPkgSetting.getPkg())) {
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diff --git a/services/core/java/com/android/server/pm/Settings.java b/services/core/java/com/android/server/pm/Settings.java
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index 475859fbc2e5..0ad5485ee643 100644
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--- a/services/core/java/com/android/server/pm/Settings.java
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+++ b/services/core/java/com/android/server/pm/Settings.java
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@@ -107,6 +107,7 @@ import com.android.permission.persistence.RuntimePermissionsPersistence;
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import com.android.permission.persistence.RuntimePermissionsState;
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import com.android.server.LocalServices;
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import com.android.server.backup.PreferredActivityBackupHelper;
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++import com.android.server.ext.PackageManagerHooks;
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import com.android.server.pm.Installer.InstallerException;
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import com.android.server.pm.parsing.PackageInfoUtils;
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import com.android.server.pm.permission.LegacyPermissionDataProvider;
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@@ -1913,8 +1914,11 @@ public final class Settings implements Watchable, Snappable, ResilientAtomicFile
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parser.getAttributeBoolean(null, ATTR_INSTANT_APP, false);
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final boolean virtualPreload =
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parser.getAttributeBoolean(null, ATTR_VIRTUAL_PRELOAD, false);
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- final int enabled = parser.getAttributeInt(null, ATTR_ENABLED,
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- COMPONENT_ENABLED_STATE_DEFAULT);
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+ final Integer enabledOverride =
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+ PackageManagerHooks.maybeOverridePackageEnabledSetting(name, userId);
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+ final int enabled = (enabledOverride != null) ?
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+ enabledOverride.intValue() :
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+ parser.getAttributeInt(null, ATTR_ENABLED, COMPONENT_ENABLED_STATE_DEFAULT);
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final String enabledCaller = parser.getAttributeValue(null,
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ATTR_ENABLED_CALLER);
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final String harmfulAppWarning =
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diff --git a/services/core/java/com/android/server/pm/permission/PermissionManagerServiceImpl.java b/services/core/java/com/android/server/pm/permission/PermissionManagerServiceImpl.java
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index cd1d7996fbac..f7dcd5c20975 100644
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--- a/services/core/java/com/android/server/pm/permission/PermissionManagerServiceImpl.java
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+++ b/services/core/java/com/android/server/pm/permission/PermissionManagerServiceImpl.java
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@@ -135,6 +135,7 @@ import com.android.server.PermissionThread;
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import com.android.server.ServiceThread;
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import com.android.server.SystemConfig;
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import com.android.server.Watchdog;
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+import com.android.server.ext.PackageManagerHooks;
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import com.android.server.pm.ApexManager;
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import com.android.server.pm.KnownPackages;
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import com.android.server.pm.PackageInstallerService;
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@@ -1369,6 +1370,13 @@ public class PermissionManagerServiceImpl implements PermissionManagerServiceInt
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isRolePermission = permission.isRole();
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isSoftRestrictedPermission = permission.isSoftRestricted();
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}
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+
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+ if (PackageManagerHooks.shouldBlockGrantRuntimePermission(mPackageManagerInt, permName, packageName, userId)) {
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+ // this method is called from within system_server and from critical system processes,
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+ // do not throw an exception, just return
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+ return;
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+ }
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+
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final boolean mayGrantRolePermission = isRolePermission
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&& mayManageRolePermission(callingUid);
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final boolean mayGrantSoftRestrictedPermission = isSoftRestrictedPermission
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@@ -2918,6 +2926,11 @@ public class PermissionManagerServiceImpl implements PermissionManagerServiceInt
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Slog.wtf(LOG_TAG, "Unknown permission protection " + bp.getProtection()
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+ " for permission " + bp.getName());
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}
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+
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+ if (Build.IS_DEBUGGABLE && PackageManagerHooks.shouldForciblyGrantPermission(pkg, bp)) {
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+ uidState.grantPermission(bp);
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+ Slog.d(TAG, "forcibly granted " + bp.getName() + " to " + pkg.getPackageName());
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+ }
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}
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if ((installPermissionsChangedForUser || replace)
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