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Code Issues Packages Projects Releases 1 Wiki Activity

Generate class mapping at runtime

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This commit is contained in:
topjohnwu
2022-02-13 06:22:42 -08:00
parent a4aa4a91a3
commit c09b4dabc4
7 changed files with 199 additions and 125 deletions
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stub/src/main/java/com/topjohnwu/magisk/DynLoad.java
+121 -7
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@@ -4,14 +4,21 @@ import static com.topjohnwu.magisk.BuildConfig.APPLICATION_ID;
import android.app.AppComponentFactory;
import android.app.Application;
import android.app.job.JobService;
import android.content.Context;
import android.content.ContextWrapper;
import android.content.pm.ActivityInfo;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ServiceInfo;
import android.os.Build;
import android.os.Environment;
import android.util.Log;
import com.topjohnwu.magisk.dummy.DummyProvider;
import com.topjohnwu.magisk.dummy.DummyReceiver;
import com.topjohnwu.magisk.dummy.DummyService;
import com.topjohnwu.magisk.utils.APKInstall;
import java.io.File;
@@ -20,6 +27,8 @@ import java.io.FileOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import io.michaelrocks.paranoid.Obfuscate;
@@ -28,15 +37,20 @@ import io.michaelrocks.paranoid.Obfuscate;
public class DynLoad {
// The current active classloader
static ClassLoader loader = new RedirectClassLoader();
static ClassLoader loader = DynLoad.class.getClassLoader();
static Object componentFactory;
static Map<String, String> componentMap = new HashMap<>();
private static boolean loadedApk = false;
static StubApk.Data createApkData() {
var data = new StubApk.Data();
data.setVersion(BuildConfig.STUB_VERSION);
data.setClassToComponent(Mapping.inverseMap);
Map<String, String> map = new HashMap<>();
for (var e : componentMap.entrySet()) {
map.put(e.getValue(), e.getKey());
}
data.setClassToComponent(map);
data.setRootService(DelegateRootService.class);
return data;
}
@@ -135,23 +149,40 @@ public class DynLoad {
if (Build.VERSION.SDK_INT < 29)
replaceClassLoader(context);
if (!loadApk(context))
int flags = PackageManager.GET_ACTIVITIES | PackageManager.GET_SERVICES
| PackageManager.GET_PROVIDERS | PackageManager.GET_RECEIVERS;
final PackageInfo info;
try {
info = context.getPackageManager()
.getPackageInfo(context.getPackageName(), flags);
} catch (PackageManager.NameNotFoundException e) {
// Impossible
throw new RuntimeException(e);
}
if (!loadApk(context)) {
loader = new RedirectClassLoader(createInternalMap(info));
return null;
}
File apk = StubApk.current(context);
PackageManager pm = context.getPackageManager();
try {
var info = pm.getPackageArchiveInfo(apk.getPath(), 0).applicationInfo;
var pkgInfo = pm.getPackageArchiveInfo(apk.getPath(), flags);
var appInfo = pkgInfo.applicationInfo;
updateComponentMap(info, pkgInfo);
// Create the receiver Application
var data = createApkData();
var app = (Application) loader.loadClass(info.className)
var app = (Application) loader.loadClass(appInfo.className)
.getConstructor(Object.class)
.newInstance(data.getObject());
// Create the receiver component factory
if (Build.VERSION.SDK_INT >= 28 && componentFactory != null) {
Object factory = loader.loadClass(info.appComponentFactory).newInstance();
Object factory = loader.loadClass(appInfo.appComponentFactory).newInstance();
var delegate = (DelegateComponentFactory) componentFactory;
delegate.receiver = (AppComponentFactory) factory;
}
@@ -168,7 +199,90 @@ public class DynLoad {
return null;
}
private static boolean isDynLoader() {
private static Map<String, Class<?>> createInternalMap(PackageInfo info) {
Map<String, Class<?>> map = new HashMap<>();
for (var c : info.activities) {
map.put(c.name, DownloadActivity.class);
}
for (var c : info.services) {
map.put(c.name, DummyService.class);
}
for (var c : info.providers) {
map.put(c.name, DummyProvider.class);
}
for (var c : info.receivers) {
map.put(c.name, DummyReceiver.class);
}
return map;
}
private static void updateComponentMap(PackageInfo from, PackageInfo to) {
{
var src = from.activities;
var dest = to.activities;
final ActivityInfo sa;
final ActivityInfo da;
final ActivityInfo sb;
final ActivityInfo db;
if (src[0].exported) {
sa = src[0];
sb = src[1];
} else {
sa = src[1];
sb = src[0];
}
if (dest[0].exported) {
da = dest[0];
db = dest[1];
} else {
da = dest[1];
db = dest[0];
}
componentMap.put(sa.name, da.name);
componentMap.put(sb.name, db.name);
}
{
var src = from.services;
var dest = to.services;
final ServiceInfo sa;
final ServiceInfo da;
final ServiceInfo sb;
final ServiceInfo db;
if (JobService.PERMISSION_BIND.equals(src[0].permission)) {
sa = src[0];
sb = src[1];
} else {
sa = src[1];
sb = src[0];
}
if (JobService.PERMISSION_BIND.equals(dest[0].permission)) {
da = dest[0];
db = dest[1];
} else {
da = dest[1];
db = dest[0];
}
componentMap.put(sa.name, da.name);
componentMap.put(sb.name, db.name);
}
{
var src = from.receivers;
var dest = to.receivers;
componentMap.put(src[0].name, dest[0].name);
}
{
var src = from.providers;
var dest = to.providers;
componentMap.put(src[0].name, dest[0].name);
}
}
static boolean isDynLoader() {
return loader instanceof InjectedClassLoader;
}