mirror of https://github.com/YTVanced/VancedMicroG
64 lines
2.0 KiB
Java
64 lines
2.0 KiB
Java
/*
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* Copyright (C) 2013-2017 microG Project Team
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.microg.gms.common;
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import java.util.Random;
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public class DeviceIdentifier {
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public String wifiMac = randomMacAddress(); // TODO: static
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public String meid = randomMeid();
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public String esn;
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private static String randomMacAddress() {
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StringBuilder mac = new StringBuilder("b407f9");
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Random rand = new Random();
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for (int i = 0; i < 6; i++) {
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mac.append(Integer.toString(rand.nextInt(16), 16));
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}
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return mac.toString();
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}
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private static String randomMeid() {
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// http://en.wikipedia.org/wiki/International_Mobile_Equipment_Identity
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// We start with a known base, and generate random MEID
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String meid;
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Random rand = new Random();
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StringBuilder meidBuilder = new StringBuilder("35503104");
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for (int i = 0; i < 6; i++) {
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meidBuilder.append(rand.nextInt(10));
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}
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meid = meidBuilder.toString();
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// Luhn algorithm (check digit)
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int sum = 0;
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for (int i = 0; i < meid.length(); i++) {
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int c = Integer.parseInt(String.valueOf(meid.charAt(i)));
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if ((meid.length() - i - 1) % 2 == 0) {
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c *= 2;
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c = c % 10 + c / 10;
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}
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sum += c;
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}
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final int check = (100 - sum) % 10;
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meid += Integer.toString(check);
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return meid;
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}
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}
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