using NPOI.OpenXmlFormats.Dml.Diagram;
using NPOI.OpenXmlFormats.Shared;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace SiteCore.taobao
{
    public class jiemiUtils
    {
        [DllImport("DrvInterface64.dll", CharSet = CharSet.Unicode)]
        public static extern uint DecFile(string filename);

        [DllImport("DrvInterface64.dll", CharSet = CharSet.Unicode)]
        public static extern int IsFileEncrypted(string filename);//返回1为加密，0为未被加密
        [DllImport("DrvInterface64.dll", CharSet = CharSet.Ansi)]
        public static extern void CreateUserKey(StringBuilder key, int len);
        [DllImport("DrvInterface64.dll", CharSet = CharSet.Ansi)]
        public static extern int InitAesKey(StringBuilder key, int len);

        [DllImport("DrvInterface64.dll")]
        public static extern int IsInitedAesKey();

        public static void ossFileDecrypt(string filePath)
        {
            int IsFileEncrypt = IsFileEncrypted(filePath);
            if (IsFileEncrypt == 1 && File.Exists(filePath))
            {
                string key = "gBQnlxiBb7MthH9644V0W0pFwqYZgyy7";
                var sb = new StringBuilder(key);

                //Linux系统的接口要调用一次，Windows系统要调用两次
                CreateUserKey(sb, key.Length);
                CreateUserKey(sb, key.Length); //破解用dse生成的文件，需要调2次。
                int result = InitAesKey(sb, sb.Length);
                result = IsInitedAesKey();
                if (result != 1)
                {

                }
                uint a = DecFile(filePath);
                if (a != 0)
                {

                }
            }
        }

    }
}