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2022-11-21 b166c0f80252ab4e1af4136789cb976364b779b2

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using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Web;
using System.Xml;
 
namespace VueWebApi.Tools
{
    public class Encrypt
    {
        private static RijndaelManaged RMCrypto = null;
 
        private Hashtable keyList = new Hashtable();
 
        public static string EncryptStr(string str, string strKey, string strIV)
        {
            CryptoStream cryptoStream = null;
            MD5CryptoServiceProvider mD5CryptoServiceProvider = new MD5CryptoServiceProvider();
            string result;
            try
            {
                Encrypt.RMCrypto = new RijndaelManaged();
                if (str == null || str.Trim().Length == 0)
                {
                    result = "";
                }
                else
                {
                    byte[] rgbKey = mD5CryptoServiceProvider.ComputeHash(Encoding.ASCII.GetBytes(strKey));
                    byte[] rgbIV = mD5CryptoServiceProvider.ComputeHash(Encoding.ASCII.GetBytes(strIV));
                    MemoryStream memoryStream = new MemoryStream(Encoding.UTF8.GetBytes(str));
                    cryptoStream = new CryptoStream(memoryStream, Encrypt.RMCrypto.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                    result = Convert.ToBase64String(memoryStream.ToArray());
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (null != cryptoStream)
                {
                    cryptoStream = null;
                }
                if (null != Encrypt.RMCrypto)
                {
                    Encrypt.RMCrypto.Clear();
                    Encrypt.RMCrypto = null;
                }
            }
            return result;
        }
 
        public static string DecryptStr(string str, string strKey, string strIV)
        {
            string result;
            if (str == null || str.Trim().Length == 0)
            {
                result = "";
            }
            else
            {
                CryptoStream cryptoStream = null;
                MD5CryptoServiceProvider mD5CryptoServiceProvider = new MD5CryptoServiceProvider();
                try
                {
                    Encrypt.RMCrypto = new RijndaelManaged();
                    byte[] buffer = Convert.FromBase64String(str);
                    byte[] rgbKey = mD5CryptoServiceProvider.ComputeHash(Encoding.ASCII.GetBytes(strKey));
                    byte[] rgbIV = mD5CryptoServiceProvider.ComputeHash(Encoding.ASCII.GetBytes(strIV));
                    MemoryStream memoryStream = new MemoryStream(buffer);
                    cryptoStream = new CryptoStream(memoryStream, Encrypt.RMCrypto.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Read);
                    result = Encoding.UTF8.GetString(memoryStream.ToArray());
                }
                catch (Exception ex)
                {
                    throw ex;
                }
                finally
                {
                    if (null != cryptoStream)
                    {
                        cryptoStream = null;
                    }
                    if (null != Encrypt.RMCrypto)
                    {
                        Encrypt.RMCrypto.Clear();
                        Encrypt.RMCrypto = null;
                    }
                }
            }
            return result;
        }
 
        public void Add(string key, string value)
        {
            if (this.keyList.ContainsKey(key))
            {
                this.keyList[key] = value;
            }
            else
            {
                this.keyList.Add(key, value);
            }
        }
 
        public string GetEncryptXml(string name, string key, string iv)
        {
            XmlDocument xmlDocument = new XmlDocument();
            XmlElement xmlElement = xmlDocument.CreateElement(name);
            foreach (object current in this.keyList.Keys)
            {
                XmlElement xmlElement2 = xmlDocument.CreateElement(Convert.ToString(current));
                xmlElement2.InnerText = Convert.ToString(this.keyList[current]);
                xmlElement.AppendChild(xmlElement2);
            }
            xmlDocument.AppendChild(xmlElement);
            return Encrypt.EncryptStr(xmlDocument.OuterXml, key, iv);
        }
 
        public Hashtable GetKeyList(string name, string encryptStr, string key, string iv)
        {
            string xml = Encrypt.DecryptStr(encryptStr, key, iv);
            XmlDocument xmlDocument = new XmlDocument();
            xmlDocument.LoadXml(xml);
            this.keyList.Clear();
            XmlNode xmlNode = xmlDocument.SelectSingleNode(name);
            if (null != xmlNode)
            {
                foreach (XmlNode xmlNode2 in xmlNode.ChildNodes)
                {
                    this.keyList.Add(xmlNode2.Name, xmlNode2.InnerText);
                }
            }
            return this.keyList;
        }
    }
}