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/*
* Copyright (C) 2017 The Android Open Source Project
* Copyright (C) 2017-2019 The LineageOS 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 org.lineageos.internal.phone;
import android.content.Context;
import android.os.Environment;
import android.telephony.PhoneNumberUtils;
import android.telephony.SubscriptionInfo;
import android.telephony.SubscriptionManager;
import android.telephony.TelephonyManager;
import android.text.TextUtils;
import android.util.Log;
import android.util.Xml;
import com.google.i18n.phonenumbers.NumberParseException;
import com.google.i18n.phonenumbers.Phonenumber;
import com.google.i18n.phonenumbers.PhoneNumberUtil;
import com.google.i18n.phonenumbers.PhoneNumberUtil.PhoneNumberFormat;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
public class SensitivePhoneNumbers {
private final String LOG_TAG = this.getClass().getSimpleName();
public static final String SENSIBLE_PHONENUMBERS_FILE_PATH = "etc/sensitive_pn.xml";
private static final String ns = null;
private HashMap<String, ArrayList<String>> mSensitiveNumbersMap = new HashMap<>();
public SensitivePhoneNumbers() {
loadSensiblePhoneNumbers();
}
private void loadSensiblePhoneNumbers() {
FileReader sensiblePNReader;
File sensiblePNFile = new File(Environment.getRootDirectory(),
SENSIBLE_PHONENUMBERS_FILE_PATH);
try {
sensiblePNReader = new FileReader(sensiblePNFile);
} catch (FileNotFoundException e) {
Log.w(LOG_TAG, "Can not open " + sensiblePNFile.getAbsolutePath());
return;
}
try {
XmlPullParser parser = Xml.newPullParser();
parser.setInput(sensiblePNReader);
parser.nextTag();
readSensitivePNS(parser);
sensiblePNReader.close();
} catch (IOException | XmlPullParserException e) {
Log.w(LOG_TAG, "Exception in spn-conf parser", e);
}
}
private void readSensitivePNS(XmlPullParser parser)
throws XmlPullParserException, IOException {
parser.require(XmlPullParser.START_TAG, ns, "sensitivePNS");
while (parser.next() != XmlPullParser.END_TAG) {
if (parser.getEventType() != XmlPullParser.START_TAG) {
continue;
}
String name = parser.getName();
if (!"sensitivePN".equals(name)) {
break;
}
SensitivePhoneNumber sensitivePN = SensitivePhoneNumber
.readSensitivePhoneNumbers(parser);
String[] mccs = sensitivePN.getNetworkNumeric().split(",");
ArrayList<String> sensitive_nums = sensitivePN.getPhoneNumbers();
for (String mcc : mccs) {
mSensitiveNumbersMap.put(mcc, sensitive_nums);
}
}
}
public boolean isSensitiveNumber(Context context, String numberToCheck, int subId) {
String nationalNumber = formatNumberToNational(context, numberToCheck);
SubscriptionManager subManager = context.getSystemService(SubscriptionManager.class);
List<SubscriptionInfo> list = subManager.getActiveSubscriptionInfoList();
if (list != null) {
// Test all subscriptions so an accidential use of a wrong sim also hides the number
for (SubscriptionInfo subInfo : list) {
String mcc = String.valueOf(subInfo.getMcc());
if (isSensitiveNumber(nationalNumber, mcc)) {
return true;
}
}
} else {
// Fall back to check with the passed subId
TelephonyManager telephonyManager = context.getSystemService(TelephonyManager.class);
if (subId == SubscriptionManager.INVALID_SUBSCRIPTION_ID) {
subId = SubscriptionManager.getDefaultSubscriptionId();
}
String networkUsed = telephonyManager.getNetworkOperator(subId);
if (!TextUtils.isEmpty(networkUsed)) {
String networkMCC = networkUsed.substring(0, 3);
return isSensitiveNumber(nationalNumber, networkMCC);
}
}
return false;
}
private boolean isSensitiveNumber(String numberToCheck, String mcc) {
if (!TextUtils.isEmpty(numberToCheck)) {
if (mSensitiveNumbersMap.containsKey(mcc)) {
for (String num : mSensitiveNumbersMap.get(mcc)) {
if (PhoneNumberUtils.compare(numberToCheck, num)) {
return true;
}
}
}
}
return false;
}
private String formatNumberToNational(Context context, String number) {
PhoneNumberUtil util = PhoneNumberUtil.getInstance();
String countryIso = context.getResources().getConfiguration().locale.getCountry();
Phonenumber.PhoneNumber pn = null;
try {
pn = util.parse(number, countryIso);
} catch (NumberParseException e) {
}
if (pn != null) {
return util.format(pn, PhoneNumberFormat.NATIONAL);
} else {
return number;
}
}
}
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