C# DES (cbc) 加密解密 (最简单的加密解密)

https://www.cnblogs.com/tianma3798/p/8807906.html 感谢这位大哥的代码提示

微软官网的这个示例正的是该换了，一点用处没看出来

https://docs.microsoft.com/zh-cn/dotnet/api/system.security.cryptography.descryptoserviceprovider.-ctor?view=netframework-4.6#System_Security_Cryptography_DESCryptoServiceProvider__ctor

/// <summary>
        /// DES CBC 加密
        /// </summary>
        /// <param name="encryStr"></param>
        /// <param name="key"></param>
        /// <param name="iv"></param>
        /// <returns></returns>
        public static string DesCBCEncryptor(string encryStr,string key,string iv)
        {
            byte[] rgbKey = Encoding.UTF8.GetBytes(key);
            byte[] rgbIV = Encoding.UTF8.GetBytes(iv);
            byte[] inputByteArray = Encoding.UTF8.GetBytes(encryStr);

            DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
            using (MemoryStream mStream = new MemoryStream())
            {
                using (CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write))
                {
                    cStream.Write(inputByteArray, 0, inputByteArray.Length);
                    cStream.FlushFinalBlock();
                    byte[] srteamArray = mStream.ToArray();
                    mStream.Close();
                    mStream.Dispose();
                    return Convert.ToBase64String(srteamArray);
                }
            }
                
        }
        /// <summary>
        /// DES CBC 解密
        /// </summary>
        /// <param name="decryStr"></param>
        /// <param name="key"></param>
        /// <param name="iv"></param>
        /// <returns></returns>
        public static string DesCBCDecryptor(string decryStr, string key, string iv)
        {
            byte[] rgbKey = Encoding.UTF8.GetBytes(key);
            byte[] rgbIV = Encoding.UTF8.GetBytes(iv);
            byte[] inputByteArray = Convert.FromBase64String(decryStr);

            DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
            using (MemoryStream mStream = new MemoryStream())
            {
                using (CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write))
                {
                    cStream.Write(inputByteArray, 0, inputByteArray.Length);
                    cStream.FlushFinalBlock();
                    byte[] srteamArray = mStream.ToArray();
                    mStream.Close();
                    mStream.Dispose();
                    return Encoding.UTF8.GetString(srteamArray);
                }
            }
        }