DES加密算法，仅供自己做笔记用

// 加密函数
    //strText要加密的字符串，strencrKey 密钥， 返回加密后的字符串　密码８位
    public static string Encrypt(string strText, string strEncrKey)
    {
        byte[] byKey = null;//初始化密钥
        byte[] IV = { 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF, 0x11, 0x12 };
        try
        {
            byKey = System.Text.Encoding.UTF8.GetBytes(strEncrKey);//获取密钥
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            byte[] inputByteArray = Encoding.UTF8.GetBytes(strText);//输入的字符串转化成字节型
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);
            cs.Write(inputByteArray, 0, inputByteArray.Length);//输出加密流
            cs.FlushFinalBlock();
            return Convert.ToBase64String(ms.ToArray());
        }
        catch (System.Exception error)
        {
            return "error:" + error.Message + "\r";
        }
    }