DES 加解密（亲测可用)

 

//字符串加解密
 string MyDESCrypto(string str, byte[] keys, byte[] ivs)
    {
        //加密
        byte[] strs = Encoding.Unicode.GetBytes(str);


        DESCryptoServiceProvider desc = new DESCryptoServiceProvider();
        MemoryStream mStream = new MemoryStream();

        ICryptoTransform transform = desc.CreateEncryptor(keys, ivs);//加密对象
        CryptoStream cStream = new CryptoStream(mStream, transform, CryptoStreamMode.Write);
        cStream.Write(strs, 0, strs.Length);
        cStream.FlushFinalBlock();
        return Convert.ToBase64String(mStream.ToArray());
    }


    string MyDESCryptoDe(string str, byte[] keys, byte[] ivs)
    {
        //解密
        byte[] strs = Convert.FromBase64String(str);

        DESCryptoServiceProvider desc = new DESCryptoServiceProvider();
        MemoryStream mStream = new MemoryStream();

        ICryptoTransform transform = desc.CreateDecryptor(keys, ivs);//解密对象

        CryptoStream cStream = new CryptoStream(mStream, transform, CryptoStreamMode.Write);
        cStream.Write(strs, 0, strs.Length);
        cStream.FlushFinalBlock();
        return Encoding.Unicode.GetString(mStream.ToArray());
    }