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New method of communication

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Introduce a new communication method between Magisk and Magisk Manager.

Magisk used to hardcode classnames and send broadcast/start activities to
specific components. This new method makes no assumption of any class names,
so Magisk Manager can easily be fully obfuscated.

In addition, the new method connects Magisk and Magisk Manager with random
abstract Linux sockets instead of socket files in filesystems, bypassing
file system complexities (selinux, permissions and such)
This commit is contained in:
topjohnwu
2018-09-16 04:16:18 -04:00
parent 4cf8d41f6a
commit 906b4aad9e
21 changed files with 655 additions and 705 deletions
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79
app/src/full/java/com/topjohnwu/magisk/superuser/SuReceiver.java
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@@ -3,88 +3,13 @@ package com.topjohnwu.magisk.superuser;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Process;
import android.widget.Toast;
import com.topjohnwu.magisk.Const;
import com.topjohnwu.magisk.Data;
import com.topjohnwu.magisk.MagiskManager;
import com.topjohnwu.magisk.R;
import com.topjohnwu.magisk.container.Policy;
import com.topjohnwu.magisk.container.SuLogEntry;
import com.topjohnwu.magisk.utils.Utils;
import java.util.Date;
import com.topjohnwu.magisk.utils.SuConnector;
public class SuReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
int fromUid, toUid, pid, mode;
String command, action;
Policy policy;
MagiskManager mm = Data.MM();
if (intent == null) return;
mode = intent.getIntExtra("mode", -1);
if (mode < 0) return;
if (mode == Const.Value.NOTIFY_USER_TO_OWNER) {
Utils.toast(R.string.multiuser_hint_owner_request, Toast.LENGTH_LONG);
return;
}
fromUid = intent.getIntExtra("from.uid", -1);
if (fromUid < 0) return;
if (fromUid == Process.myUid()) return; // Don't show anything if it's Magisk Manager
action = intent.getStringExtra("action");
if (action == null) return;
policy = mm.mDB.getPolicy(fromUid);
if (policy == null) {
try {
policy = new Policy(fromUid, mm.getPackageManager());
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
return;
}
}
SuLogEntry log = new SuLogEntry(policy);
String message;
switch (action) {
case "allow":
message = mm.getString(R.string.su_allow_toast, policy.appName);
log.action = true;
break;
case "deny":
message = mm.getString(R.string.su_deny_toast, policy.appName);
log.action = false;
break;
default:
return;
}
if (policy.notification && Data.suNotificationType == Const.Value.NOTIFICATION_TOAST)
Utils.toast(message, Toast.LENGTH_SHORT);
if (mode == Const.Value.NOTIFY_NORMAL_LOG && policy.logging) {
toUid = intent.getIntExtra("to.uid", -1);
if (toUid < 0) return;
pid = intent.getIntExtra("pid", -1);
if (pid < 0) return;
command = intent.getStringExtra("command");
if (command == null) return;
log.toUid = toUid;
log.fromPid = pid;
log.command = command;
log.date = new Date();
mm.mDB.addLog(log);
}
SuConnector.handleLogs(intent, 1);
}
}