MyModels/Global.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Security.Cryptography;
using System.IO;
using System.Text.RegularExpressions;

namespace MyModels
{

    public class Global
    {
        private const string cryKey = "High&o@e", cryIvs = "A#12&Xu9";
        /// <summary>
        /// 加密字符串
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string EnCryStr(string str)
        {
            return Encrypt(str, cryKey, cryIvs, true);
        }

        public static string DeCryStr(string str)
        {
            try
            {
                return Decrypt(str, cryKey, cryIvs, true);
            }
            catch (Exception ex)
            {
                return string.Empty;
            }
        }
        public static string Encrypt(string str, string key, bool toBase64)
        {
            using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
            {
                byte[] data = System.Text.Encoding.UTF8.GetBytes(str);
                byte[] byteKeys = System.Text.Encoding.UTF8.GetBytes(key);
                des.Key = byteKeys;
                des.IV = byteKeys;
                MemoryStream ms = new MemoryStream();
                using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))
                {
                    cs.Write(data, 0, data.Length);
                    cs.FlushFinalBlock();
                    cs.Close();
                }
                string s = toBase64
                    ? Convert.ToBase64String(ms.ToArray())
                    : System.Text.Encoding.UTF8.GetString(ms.ToArray());
                ms.Close();
                return s;
            }
        }

        public static string Encrypt(string str, string key, string ivs, bool toBase64)