DES to skrót od Data Encryption Standard, czyli data encryption standard, czyli algorytm blokowy wykorzystujący szyfrowanie kluczem, który został zidentyfikowany jako Federal Data Processing Standard (FIPS) przez National Bureau of Standards rządu federalnego USA w 1976 roku i od tego czasu jest szeroko rozpowszechniany na całym świecie. - 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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Opublikowano 08.06.2015 09:31:47
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