ArmA 3 / DayZ-Standalone - BattlEye GUID calculation

beguidcalc.md

md5("BE" (2 bytes) + 64-bit SteamID (8 bytes))

example.cpp

std::stringstream bestring;
__int64 steamID = 76561197996545192;
__int8 i = 0, parts[8] = { 0 };
do parts[i++] = steamID & 0xFF;
while (steamID >>= 8);

bestring << "BE";
for (int i = 0; i < sizeof(parts); i++) {
	bestring << char(parts[i]);
}

// I used this md5 library http://www.zedwood.com/article/cpp-md5-function
std::cout << md5(bestring.str()) << std::endl;

example.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
	class Program
	{
		static void Main(string[] args)
		{
			Int64 SteamId = 76561197996545192;
			byte[] parts = { 0x42, 0x45, 0, 0, 0, 0, 0, 0, 0, 0 };
			byte counter = 2;

			do
			{
				parts[counter++] = (byte)(SteamId & 0xFF);
			} while ((SteamId >>= 8) > 0);

			MD5 md5 = new MD5CryptoServiceProvider();
			byte[] beHash = md5.ComputeHash(parts);
			StringBuilder sb = new StringBuilder();
			for (int i = 0; i < beHash.Length; i++)
			{
				sb.Append(beHash[i].ToString("x2"));
			}

			Console.Out.WriteLine(sb.ToString());
			Console.In.Read();
		}
	}
}

example.go

// Thanks to nano2k
package main


import (
	"crypto/md5"
	"fmt"
)

func main() {
  steamid := 76561197996545192

	h := md5.New()
	h.Write([]byte("BE"))

	for i := 0; i < 8; i++ {
		h.Write([]byte{byte(steamid & 0xFF)})
		steamid >>= 8
	}

	fmt.Printf("Battleye GUID: %x", h.Sum(nil))
}

example.js

var crypto = require('crypto');
var int64 = require('int64-native');

var md5Hash = crypto.createHash('md5');
var steamId = new int64('76561197996545192'); // The steamid must be a STRING! not a number!

md5Hash.update('BE');
for (var i = 0; i < 8; i++) {
	md5Hash.update(String.fromCharCode(steamId.and(0xFF).toNumber()));
	steamId = steamId.shiftRight(8);
}

console.log(md5Hash.digest('hex'));

example.php

<?php //Cheers Rommel

/* Verify that following value is higher than 2147483647(32bit):
echo PHP_INT_MAX;
*/

$steamID = '76561197996545192';
$temp = '';

for ($i = 0; $i < 8; $i++) {
	$temp .= chr($steamID & 0xFF);
	$steamID >>= 8;
}

$return = md5('BE' . $temp);

echo $return;
?>

example.py

# Thanks to gunlinux
import md5

steamid=76561197996545192
temp = ""
for i in range(8):
	temp +=  chr((steamid & 0xFF))
	steamid >>= 8
m = md5.new("BE"+temp)

print m.hexdigest()

example.sql

-- Microsoft SQL Server
-- https://github.com/Fankserver/Microsoft-SQL-Server-Assemblies/tree/master/BattlEye
SELECT SteamIdToBattlEyeGUID(76561197996545192);

php

function beguid($id) {
	$result = '';
	for ($i = 0; $i < 8; $i++) {		
		$result .= chr(gmp_strval(gmp_and($id, 0xFF)));
		$id = gmp_div($id, gmp_pow(2, 8));
	}
	return md5('BE' . $result);
}

$guid = beguid(gmp_abs(steamid));

Much easier version of the C++ one: (I'm sure it can be simplified even more, not sure. ;P)

std::string computeSteam64BattlEyeGUID(long long steam64ID){
    std::string bestring = "BE";
    for(size_t i = 0; i == 0 || (steam64ID >>= 8); bestring += (steam64ID & 0xFF), ++i);
    return md5(bestring); //http://www.zedwood.com/article/cpp-md5-function
}

Modern approach to reverse-lookup: https://github.com/Multivit4min/beguid-converter/

Here is a nodejs implementation that needs no external deps as long as your running +10.4.0

// nodejs +10.4.0
import { createHash } from 'crypto';

const steamId = 76561197996545192n; // cd97cc68c1038b485b081ba2aa3ea6fa
const bytes = [];

for (let i = 0; i < 8; i++) {
	bytes.push(Number((steamId >> (8n * BigInt(i))) & 0xffn));
}

const guid = createHash('md5').update(Buffer.from([0x42, 0x45, ...bytes])).digest('hex');

console.log(guid);

Fank, can this be done the other way around to? Like from guid to SteamId?

Yes you can.

Use the free reverse-lookup / converter: https://devt0ols.net/converter

Available on each browser and any mobile device.

Valid lookup values: Steam (Vanity) URL, Steam ID, Steam ID 3, Steam ID 64, BattlEye ID, Bohemia ID

---

REST API

https://devt0ols.net/converter/?inc=help/api

Example response:

{
  "error": false,
  "result": {
    "steam_url": "https://steamcommunity.com/profiles/76561197960265729",
    "steam_id": "STEAM_0:1:0",
    "steam_id3": "[U:1:1]",
    "steam_id64": "76561197960265729",
    "battleye_id": "74ae012b5407e0a3cc2cd82ec1f8ba7d",
    "bohemia_id": "ccuWIpEIrX_wmD5VsthErf1qNQbEK7IdG6fL1Il4KuA=",
    "requests": 1
  }
}

---

Discord BOT

https://devt0ols.net/converter/?inc=main/bot

Invitation link: ID Bot

The BOT is able to lookup and convert each of the mentioned values above.

There is also the AllianceApps API: https://allianceapps.io/beguid

Or if you would like to host it yourself: https://github.com/Multivit4min/beguid-converter

Edit: Just realized I shared this link already :D

But no, you cannot convert it directly (without a rainbow table).

Guid and UID Calculator Discord Bot
https://github.com/siegmund0/SteamID64ToGUID-Discord-Bot