这段代码怎么用能解释意思吗大神们

qq_28670221 2019-02-15 11:01:48

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.IO;

using System.Security.Cryptography;

using System.Net;

using System.Xml;



namespace ConsoleApp1 {

    class Program {

        static void Main(string[] args) {

            string url = "http://app.58.com/api/detail/zpfangchan/36149962795705?v=1&platform=android&version=7.0.1.0&sidDict=%7B%22PGTID%22%3A%22%22%2C%22GTID%22%3A%22101551665202271302713434986%22%7D&format=xml&localname=linyi&commondata=%7B%22cateid%22%3A%2238673%22%2C%22catename%22%3A%22%25e6%2588%25bf%25e5%259c%25b0%25e4%25ba%25a7%22%2C%22filterparams%22%3A%7B%7D%7D";

            WebClient webClient = new WebClient();

            webClient.Headers["User-Agent"] = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36";

            webClient.Headers.Add(HttpRequestHeader.Accept, "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8");     

            byte[] myDataBuffer = webClient.DownloadData(url);

            string data = Encoding.UTF8.GetString(myDataBuffer);

            XmlDocument xml = new XmlDocument();

            xml.LoadXml(data);

            XmlNode xn_tel_info = xml.SelectSingleNode("/root/result/userinfo_area/tel_info");

            if (xn_tel_info != null) {

                string phone = xn_tel_info.Attributes["content"].Value;

                Console.WriteLine(phone);

                if (phone.Length > 0)

                    phone = AES.Decrypt(phone, "crazycrazycrazy1");

                Console.WriteLine(phone);

            }

            Console.ReadLine();

        }

    }

    public class AES {

        /// <summary>

        /// 加密

        /// </summary>

        /// <param name="str"></param>

        /// <param name="key"></param>

        /// <returns></returns>

        public static string Encrypt(string str, string key) {

            if (string.IsNullOrEmpty(str)) return null;

            Byte[] toEncryptArray = Encoding.UTF8.GetBytes(str);



            RijndaelManaged rm = new RijndaelManaged {

                Key = Encoding.UTF8.GetBytes(key),

                Mode = CipherMode.ECB,

                Padding = PaddingMode.PKCS7

            };



            ICryptoTransform cTransform = rm.CreateEncryptor();

            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            //string ss = resultArray.ToHexString();

            //return Convert.ToBase64String(resultArray, 0, resultArray.Length);

            return resultArray.ToHexString();

        }

        /// <summary>

        /// 解密

        /// </summary>

        /// <param name="str"></param>

        /// <param name="key"></param>

        /// <returns></returns>

        public static string Decrypt(string str, string key) {

            if (string.IsNullOrEmpty(str)) return null;

            //byte[] toEncryptArray = Convert.FromBase64String(str);

            byte[] toEncryptArray = str.ToByteArr();

            RijndaelManaged rm = new RijndaelManaged {

                Key = Encoding.UTF8.GetBytes(key),

                Mode = CipherMode.ECB,

                Padding = PaddingMode.PKCS7

            };

            ICryptoTransform cTransform = rm.CreateDecryptor();

            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            return Encoding.UTF8.GetString(resultArray);

        }

    }

    public static class Util {

        public static string ToHexString(this byte[] bytes) {

            string byteStr = string.Empty;

            if (bytes != null || bytes.Length > 0) {

                foreach (var item in bytes) {

                    byteStr += string.Format("{0:X2}", item);



                }

            }

            return byteStr;

        }

        public static byte[] ToByteArr(this string hex) {

            var inputByteArray = new byte[hex.Length / 2];

            for (var x = 0; x < inputByteArray.Length; x++) {

                var i = Convert.ToInt32(hex.Substring(x * 2, 2), 16);

                inputByteArray[x] = (byte)i;

            }

            return inputByteArray;

        }





    }

}