CTT/Server/Hotfix/Game/Helper/AccountHelper.cs

using MongoDB.Driver;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

namespace ET
{
    public static class AccountHelper
    {
        private static Dictionary<string, int> accountRegisterCount = new();
        public static async ETTask<int> GetFirbiddenIpCount(string ip)
        {
            List<ForbiddenIP> list = await DBComponent.Instance.QueryFilter(Builders<ForbiddenIP>.Filter.Eq(t => t.Ip, ip));
            if (list == null || list.Count == 0)
            {
                return 0;
            }

            ForbiddenIP forbiddenIP = list[0];
            return forbiddenIP.count;
        }

        public static string GetPlayerFormatName(this long id)
        {
            return $"【{UserComponent.Instance.Get(id)?.NickName}({id})】";
        }

        public static async ETTask CheckIdentify(Account account,string identify)
        {
            account.identifyList ??= new();
            byte[] bytes = Encoding.UTF8.GetBytes(identify);
            Utility.Encryption.GetSelfXorBytes(bytes, CryptionHelper.GetXorKey());
            string _key = Encoding.UTF8.GetString(bytes);
            account.identifyList.Add(_key);
            await DBComponent.Instance.Save(account);
        }

        public static bool CanRegister(string identify)
        {
            byte[] bytes = Encoding.UTF8.GetBytes(identify);
            Utility.Encryption.GetSelfXorBytes(bytes, CryptionHelper.GetXorKey());
            string _key = Encoding.UTF8.GetString(bytes);
            var arr = _key.Split('+');
            string strCount1 = arr[0];
            string strCount2 = arr[4];
            string strCount3 = arr[6];
            
            string strValue1 = arr[1];
            string strValue2 = arr[5];
            string strValue3 = arr[7];
            if (!int.TryParse(strCount1, out int count1) ||!int.TryParse(strCount2, out int count2)||!int.TryParse(strCount3, out int count3))
                return false;
            if (count1 != strValue1.Length || count2 != strValue2.Length || count3 != strValue3.Length)
                return false;
            
            if (accountRegisterCount.TryGetValue(_key, out var count))
            {
                if (count >= 10) return false;
            }

            return true;
        }

        public static void Refresh()
        {
            accountRegisterCount.Clear();
        }
    }
    public sealed class SecurityUtil
    {
        public class SecurityData
        {
            public byte[] xorScale;
        }

        private static readonly byte[] xorScale;
        static SecurityUtil()
        {
            if (xorScale == null)
            {
                string path = Path.Combine(Environment.CurrentDirectory, "../Release/key");
                string str = File.ReadAllText(path);
                SecurityData data = MongoHelper.FromJson<SecurityData>(str);
                xorScale = data.xorScale;
            }
        }

        /// <summary>
        /// 对数组进行异或
        /// </summary>
        /// <param name="buffer"></param>
        /// <returns></returns>
        public static byte[] Xor(byte[] buffer)
        {
            //------------------
            //第3步：xor解密
            //------------------
            int iScaleLen = xorScale.Length;
            for (int i = 0; i < buffer.Length; i++)
            {
                buffer[i] = (byte)(buffer[i] ^ xorScale[i % iScaleLen]);
            }
            return buffer;
        }
    }
}