DES significa Data Encryption Standard, es decir, data encryption standard, que es un algoritmo de bloques que utiliza cifrado de claves, identificado como el Federal Data Processing Standard (FIPS) por la Oficina Nacional de Normas del gobierno federal de EE. UU. en 1976, y desde entonces ha circulado ampliamente internacionalmente. - using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Web;
- using System.Security.Cryptography;
- using System.Text;
- namespace TestWeb
- {
- public class DESEncrypt
- {
- #region ========加密========
- /// <summary>
- /// 加密
- /// </summary>
- /// <param name="Text"></param>
- /// <returns></returns>
- public static string Encrypt(string Text)
- {
- return Encrypt(Text, "Test");
- }
- /// <summary>
- /// 加密数据
- /// </summary>
- /// <param name="Text"></param>
- /// <param name="sKey"></param>
- /// <returns></returns>
- public static string Encrypt(string Text, string sKey)
- {
- DESCryptoServiceProvider des = new DESCryptoServiceProvider();
- byte[] inputByteArray;
- inputByteArray = Encoding.Default.GetBytes(Text);
- des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
- des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").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
- #region ========解密========
- /// <summary>
- /// 解密
- /// </summary>
- /// <param name="Text"></param>
- /// <returns></returns>
- public static string Decrypt(string Text)
- {
- return Decrypt(Text, "Test");
- }
- /// <summary>
- /// 解密数据
- /// </summary>
- /// <param name="Text"></param>
- /// <param name="sKey"></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 = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
- des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").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
- }
- }
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Publicado en 8/6/2015 9:31:47
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