C#des加密解密

標籤：解密   str   key   lock   bst   code   log   ring   pen   

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Security.Cryptography;using System.IO;using System.Text;/// <summary>/// Des 的摘要說明/// </summary>public class Des{    public Des()    {            }    public static string Encrypt(string stringToEncrypt, string sKey)    {        DESCryptoServiceProvider des = new DESCryptoServiceProvider();        byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(stringToEncrypt);        des.Key = ASCIIEncoding.UTF8.GetBytes(sKey);        des.IV = ASCIIEncoding.UTF8.GetBytes(sKey);        MemoryStream ms = new 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);        }        ret.ToString();        return ret.ToString();    }    public static string Decrypt(string stringToDecrypt, string sKey)    {        DESCryptoServiceProvider des = new DESCryptoServiceProvider();        byte[] inputByteArray = new byte[stringToDecrypt.Length / 2];        for (int x = 0; x < stringToDecrypt.Length / 2; x++)        {            int i = (Convert.ToInt32(stringToDecrypt.Substring(x * 2, 2), 16));            inputByteArray[x] = (byte)i;        }        des.Key = ASCIIEncoding.UTF8.GetBytes(sKey);        des.IV = ASCIIEncoding.UTF8.GetBytes(sKey);        MemoryStream ms = new MemoryStream();        CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);        cs.Write(inputByteArray, 0, inputByteArray.Length);        cs.FlushFinalBlock();        StringBuilder ret = new StringBuilder();        return System.Text.Encoding.Default.GetString(ms.ToArray());    }}

        string key = "cba1238b";        string abc= Des.Encrypt("abc", key);        Response.Write(abc);        Response.Write("<hr>");        string abc2 = Des.Decrypt(abc, key);        Response.Write(abc2);

 

C#des加密解密