DES加密解密类

/// <summary>
/// DES加密/解密类。
/// </summary>
public class DESEncrypt
{
public DESEncrypt()
{ 
}
 
 
#region ========加密======== 
 
        /// <summary>
        /// 加密
        /// </summary>
        /// <param name="Text"></param>
        /// <returns></returns>
public static string Encrypt(string Text) 
{
            return Encrypt(Text, "shusoft");
}
/// <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, "shusoft");
}
/// <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 
 
 
 
 
}

补充：综合编程 , 其他综合 ,

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