import time

import base64

import pyDes

import binascii

def DESEncrypt(desKey,  target):

    key = desKey[0:8]

    IV =desKey[::-1][0:8]

    btKey =key.encode(encoding='utf8')

    btIV  =IV.encode(encoding='utf8')

    k = pyDes.des(btKey, mode=pyDes.CBC, IV=btIV, pad=None, padmode=pyDes.PAD_PKCS5)

    en = k.encrypt(target)

    return en

def GetEncryptBase64(userid,pwd):

    str_time=time.strftime("%Y%m%d")

    char_list = list(str_time)

    int_list=list(map(lambda x:int(x,10),char_list))

    deskey=sum(int_list)

    deskey*=int(str_time,10)

    deskeystr=str(deskey).zfill(8)

    userinfostr=userid+":"+pwd

    userinfoEncryptBytes=DESEncrypt(deskeystr,userinfostr.encode(encoding='utf8'))

    userinfoEncryptBase64 = base64.b64encode(userinfoEncryptBytes).decode('ascii')

    return userinfoEncryptBase64

result=GetEncryptBase64("userid","userpwd")

print("result={}".format(result))

'''

  byte[] DESEncrypt(string desKey, byte[] target)

        {

            if (desKey.Length < 8) throw new Exception("parameter desKey length should equal greater than 8");

            var key = desKey.Substring(0, 8);

            var IV = string.Join("", desKey.Reverse()).Substring(0, 8);

            byte[] btKey = Encoding.UTF8.GetBytes(key);

            byte[] btIV = Encoding.UTF8.GetBytes(IV);

            DESCryptoServiceProvider des = new DESCryptoServiceProvider();

            using (MemoryStream ms = new MemoryStream())

            {

                using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(btKey, btIV), CryptoStreamMode.Write))

                {

                    cs.Write(target, 0, target.Length);

                    cs.FlushFinalBlock();

                }

                return ms.ToArray();

            }

        }

 public string  GetEncryptBase64(string userid, string pwd)

        {

            Int64 deskey = DateTime.Now.ToString("yyyyMMdd").Sum(c => Convert.ToInt32(c.ToString()));

            deskey *= Convert.ToInt32(DateTime.Now.ToString("yyyyMMdd"));

            string deskeystr = deskey.ToString().PadLeft(8, '0');

            string userinfostr = userid + ":" + pwd;

            var userinfoEncryptBytes = DESEncrypt(deskeystr, Encoding.UTF8.GetBytes(userinfostr));

            var userinfoEncryptBase64 = Convert.ToBase64String(userinfoEncryptBytes);

            return userinfoEncryptBase64;

        }

'''