zhywebcore/learun.core/learun.util/DESEncrypt.cs

using System;
using System.Security.Cryptography;
using System.Text;

namespace learun.util
{
	/// <summary>
	/// 版 本 EasyCode EC管理后台
	/// Copyright (c) 2019-present EC管理有限公司
	/// 创建人：tobin
	/// 日 期：2019.09.13
	/// 描 述：加密、解密帮助类
	/// </summary>
	public static class DESEncrypt
	{
		private static readonly string key = "learun###***";

		#region ========加密========

		/// <summary>
		/// 加密
		/// </summary>
		/// <param name="Text">需要加密的内容</param>
		/// <returns></returns>
		public static string Encrypt(string Text)
		{
			return Encrypt(Text, key);
		}

		/// <summary>
		/// 加密数据
		/// </summary>
		/// <param name="Text">需要加密的内容</param>
		/// <param name="sKey">秘钥</param>
		/// <returns></returns>
		public static string Encrypt(string Text, string sKey)
		{
			DESCryptoServiceProvider des = new DESCryptoServiceProvider();
			byte[] inputByteArray;
			inputByteArray = Encoding.Default.GetBytes(Text);
			des.Key = Encoding.ASCII.GetBytes(Md5Helper.Hash(sKey).ToUpper().Substring(0, 8));
			des.IV = Encoding.ASCII.GetBytes(Md5Helper.Hash(sKey).ToUpper().Substring(0, 8));
			System.IO.MemoryStream ms = new System.IO.MemoryStream();
			CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
			cs.Write(inputByteArray, 0, inputByteArray.Length);
			cs.FlushFinalBlock();
			StringBuilder ret = new StringBuilder();
			foreach (byte b in ms.ToArray())
			{
				ret.AppendFormat("{0:X2}", b);
			}
			return ret.ToString();
		}

		#endregion ========加密========

		#region ========解密========

		/// <summary>
		/// 解密
		/// </summary>
		/// <param name="Text">需要解密的内容</param>
		/// <returns></returns>
		public static string Decrypt(string Text)
		{
			if (!string.IsNullOrEmpty(Text))
			{
				return Decrypt(Text, key);
			}
			else
			{
				return "";
			}
		}

		/// <summary>
		/// 解密数据
		/// </summary>
		/// <param name="Text">需要解密的内容</param>
		/// <param name="sKey">秘钥</param>
		/// <returns></returns>
		public static string Decrypt(string Text, string sKey)
		{
			DESCryptoServiceProvider des = new DESCryptoServiceProvider();
			int len;
			len = Text.Length / 2;
			byte[] inputByteArray = new byte[len];
			int x, i;
			for (x = 0; x < len; x++)
			{
				i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
				inputByteArray[x] = (byte)i;
			}
			des.Key = Encoding.ASCII.GetBytes(Md5Helper.Hash(sKey).ToUpper().Substring(0, 8));
			des.IV = Encoding.ASCII.GetBytes(Md5Helper.Hash(sKey).ToUpper().Substring(0, 8));
			System.IO.MemoryStream ms = new System.IO.MemoryStream();
			CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
			cs.Write(inputByteArray, 0, inputByteArray.Length);
			cs.FlushFinalBlock();
			return Encoding.Default.GetString(ms.ToArray());
		}

		#endregion ========解密========
	}
}