/*
 * Copyright (C) 2022 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_2021_0642;

import static androidx.test.core.app.ApplicationProvider.getApplicationContext;
import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
import static org.hamcrest.CoreMatchers.notNullValue;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.junit.Assume.assumeNoException;
import static org.junit.Assume.assumeTrue;

import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.telephony.TelephonyManager;

import androidx.test.runner.AndroidJUnit4;
import androidx.test.uiautomator.By;
import androidx.test.uiautomator.BySelector;
import androidx.test.uiautomator.UiDevice;
import androidx.test.uiautomator.UiObject2;
import androidx.test.uiautomator.Until;

import java.util.List;

import org.junit.Test;
import org.junit.runner.RunWith;

@RunWith(AndroidJUnit4.class)
public class DeviceTest {
    static final String APP_TITLE = "CVE-2021-0642";
    static final String PACKAGE_NAME = "com.android.phone";
    static final int LAUNCH_TIMEOUT_MS = 20000;

    @Test
    public void testCVE_2021_0642() {
        UiDevice device = UiDevice.getInstance(getInstrumentation());
        Context context = getApplicationContext();
        assertThat(context, notNullValue());
        PackageManager packageManager = context.getPackageManager();
        assertThat(packageManager, notNullValue());
        assumeTrue(packageManager.hasSystemFeature(PackageManager.FEATURE_TELEPHONY));
        final Intent intent = new Intent(TelephonyManager.ACTION_CONFIGURE_VOICEMAIL);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        try {
            context.startActivity(intent);
        } catch (ActivityNotFoundException e) {
            assumeNoException(e);
        }

        // Check if "com.android.phone" exists on the system
        try {
            packageManager.getPackageUid(PACKAGE_NAME, 0);
        } catch (PackageManager.NameNotFoundException e) {
            assumeNoException(e);
        }

        // Wait for activity (which is part of package "com.android.phone") that
        // handles ACTION_CONFIGURE_VOICEMAIL to get launched
        boolean isVoicemailVisible =
                device.wait(Until.hasObject(By.pkg(PACKAGE_NAME)), LAUNCH_TIMEOUT_MS);

        // To check if PocActivity was launched
        BySelector selector = By.enabled(true);
        List<UiObject2> objects = device.findObjects(selector);
        boolean isPocActivityVisible = false;
        for (UiObject2 o : objects) {
            String visibleText = o.getText();
            if ((visibleText != null) && (visibleText.equalsIgnoreCase(APP_TITLE))) {
                isPocActivityVisible = true;
                break;
            }
        }
        device.pressHome();

        assumeTrue(isVoicemailVisible || isPocActivityVisible);

        String outputMsg = "Device is vulnerable to b/185126149 "
                + "hence sensitive Iccid could be sniffed by intercepting "
                + "ACTION_CONFIGURE_VOICEMAIL implicit intent";
        assertTrue(outputMsg, ((isVoicemailVisible) && (!isPocActivityVisible)));
    }
}