?? st_functions.cs
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using System;
using System.Text;
using System.Web.Security;
namespace ST_GROUP.FlowerPrearrange
{
/// <summary>
/// functions
/// </summary>
public class ST_Functions
{
public ST_Functions()
{
//
// TODO: Add constructor logic here
//
}
/// <summary>
/// HTML encode
/// </summary>
/// <param name="str">string</param>
/// <returns></returns>
public static string ST_Encode(string str)
{
str = str.Replace("&","&");
str = str.Replace("'","''");
str = str.Replace("\"",""");
str = str.Replace(" "," ");
str = str.Replace("<","<");
str = str.Replace(">",">");
str = str.Replace("\n","<br>");
return str;
}
/// <summary>
/// decode
/// </summary>
/// <param name="str">string</param>
/// <returns></returns>
public static string ST_Decode(string str)
{
str = str.Replace("<br>","\n");
str = str.Replace(">",">");
str = str.Replace("<","<");
str = str.Replace(" "," ");
str = str.Replace(""","\"");
return str;
}
/// <summary>
/// encrypting string
/// </summary>
/// <returns></returns>
public static string ST_Encrypt(string Password)
{
string str = "";
FormsAuthenticationTicket ticket = new System.Web.Security.FormsAuthenticationTicket(Password,true,2);
str = FormsAuthentication.Encrypt(ticket).ToString();
return str;
}
/// <summary>
/// encrypting string
/// </summary>
/// <param name="Password">encrypting string</param>
/// <param name="Format">format,0 is SHA1,1 is MD5</param>
/// <returns></returns>
public static string ST_Encrypt(string Password,int Format)
{
string str = "";
switch(Format)
{
case 0:
str = FormsAuthentication.HashPasswordForStoringInConfigFile(Password,"SHA1");
break;
case 1:
str = FormsAuthentication.HashPasswordForStoringInConfigFile(Password,"MD5");
break;
}
return str;
}
/// <summary>
/// decrypt string
/// </summary>
/// <param name="Passowrd">encrypted string</param>
/// <returns></returns>
public static string ST_Decrypt(string Passowrd)
{
string str="";
str= FormsAuthentication.Decrypt(Passowrd).Name.ToString();
return str;
}
/// <summary>
/// ST_Encrypt Cookie
/// </summary>
/// <param name="str">Target cookie string</param>
/// <returns></returns>
public static string ST_EncryptCookie(string strCookie,int type)
{
string str=ST_En(strCookie,type);
StringBuilder sb = new StringBuilder();
foreach(char a in str)
{
sb.Append(Convert.ToString(a,16).PadLeft(4,'0'));
}
return sb.ToString();
}
/// <summary>
/// Decrypt Cookie
/// </summary>
/// <param name="str">Target cookie string</param>
/// <returns></returns>
public static string ST_DecryptCookie(string strCookie,int type)
{
StringBuilder sb = new StringBuilder();
string [] strarr = new String[255];
int i,j,count=strCookie.Length/4;
string strTmp;
for(i=0;i<count;i++)
{
for(j=0;j<4;j++)
{
sb.Append(strCookie.Substring(i*4+j,1));
}
strarr[i] = sb.ToString();
sb.Remove(0,sb.Length);
}
for(i=0;i<count;i++)
{
strTmp = uint.Parse(strarr[i],System.Globalization.NumberStyles.AllowHexSpecifier).ToString("D");
char ch = (char)uint.Parse(strTmp);
sb.Append(ch);
}
return ST_De(sb.ToString(),type);
}
private static string ST_En(string strCookie,int type)
{
string str;
if(type % 2==0)
{
str = ST_Transform1(strCookie);
}
else
{
str = ST_Transform3(strCookie);
}
str = ST_Transform2(strCookie);
return str;
}
private static string ST_De(string strCookie,int type)
{
string str;
if(type % 2==0)
{
str = ST_DeTransform1(strCookie);
}
else
{
str = ST_DeTransform3(strCookie);
}
str = ST_Transform2(strCookie);
return str;
}
/// <summary>
/// methods 1
/// </summary>
/// <param name="str">string</param>
/// <returns>decrypted string</returns>
public static string ST_DeTransform1(string str)
{
int i=0;
StringBuilder sb = new StringBuilder();
foreach(char a in str)
{
switch(i % 6)
{
case 0:
sb.Append((char)(a-1));
break;
case 1:
sb.Append((char)(a-5));
break;
case 2:
sb.Append((char)(a-7));
break;
case 3:
sb.Append((char)(a-2));
break;
case 4:
sb.Append((char)(a-4));
break;
case 5:
sb.Append((char)(a-9));
break;
}
i++;
}
return sb.ToString();
}
/// <summary>
/// method1
/// </summary>
/// <param name="str">string</param>
/// <returns>encrypted string</returns>
public static string ST_Transform1(string str)
{
int i=0;
StringBuilder sb = new StringBuilder();
foreach(char a in str)
{
switch(i % 6)
{
case 0:
sb.Append((char)(a+1));
break;
case 1:
sb.Append((char)(a+5));
break;
case 2:
sb.Append((char)(a+7));
break;
case 3:
sb.Append((char)(a+2));
break;
case 4:
sb.Append((char)(a+4));
break;
case 5:
sb.Append((char)(a+9));
break;
}
i++;
}
return sb.ToString();
}
/// <summary>
/// method1
/// </summary>
/// <param name="str">string</param>
/// <returns>encrypted string</returns>
public static string ST_Transform2(string str)
{
uint j=0;
StringBuilder sb = new StringBuilder();
str=ST_Reverse(str);
foreach(char a in str)
{
j=a;
if(j>255)
{
j=(uint)((a>>8) + ((a&0x0ff)<<8));
}
else
{
j=(uint)((a>>4) + ((a&0x0f)<<4));
}
sb.Append((char)j);
}
return sb.ToString();
}
/// <summary>
/// methods 1
/// </summary>
/// <param name="str">string</param>
/// <returns>decrypted string</returns>
public static string ST_DeTransform3(string str)
{
int i=0;
StringBuilder sb = new StringBuilder();
foreach(char a in str)
{
switch(i % 6)
{
case 0:
sb.Append((char)(a-3));
break;
case 1:
sb.Append((char)(a-6));
break;
case 2:
sb.Append((char)(a-8));
break;
case 3:
sb.Append((char)(a-7));
break;
case 4:
sb.Append((char)(a-5));
break;
case 5:
sb.Append((char)(a-2));
break;
}
i++;
}
return sb.ToString();
}
/// <summary>
/// method1
/// </summary>
/// <param name="str">string</param>
/// <returns>encrypted string</returns>
public static string ST_Transform3(string str)
{
int i=0;
StringBuilder sb = new StringBuilder();
foreach(char a in str)
{
switch(i % 6)
{
case 0:
sb.Append((char)(a+3));
break;
case 1:
sb.Append((char)(a+6));
break;
case 2:
sb.Append((char)(a+8));
break;
case 3:
sb.Append((char)(a+7));
break;
case 4:
sb.Append((char)(a+5));
break;
case 5:
sb.Append((char)(a+2));
break;
}
i++;
}
return sb.ToString();
}
/// <summary>
/// reverse
/// </summary>
/// <param name="str">string</param>
/// <returns>reversed string</returns>
public static string ST_Reverse(string str)
{
int i;
StringBuilder sb = new StringBuilder();
for(i=str.Length-1;i>=0;i--)
{
sb.Append(str[i]);
}
return sb.ToString();
}
}
}
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