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/// <summary> /// 加密数据 /// </summary> /// <param name="Text"></param> 加密文本 /// <param name="sKey"></param> 加密key /// <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(); } |
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/// <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()); } |
原文：http://www.cnblogs.com/lijnlong/p/3622955.html