ASP上兩個防止SQL注入式攻擊Function

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攻擊  

'==========================
'過濾提交表單中的SQL
'==========================
function ForSqlForm()
 dim fqys,errc,i,items
 dim nothis(18)
 nothis(0)="net user"

 nothis(1)="xp_cmdshell"

 nothis(2)="/add"

 nothis(3)="exec%20master.dbo.xp_cmdshell"

 nothis(4)="net localgroup administrators"

 nothis(5)="select"

 nothis(6)="count"

 nothis(7)="asc"

 nothis(8)="char"

 nothis(9)="mid"

 nothis(10)="'"

 nothis(11)=":"

 nothis(12)=""""

 nothis(13)="insert"

 nothis(14)="delete"

 nothis(15)="drop"

 nothis(16)="truncate"

 nothis(17)="from"

 nothis(18)="%"
 
 'nothis(19)="@" 

 errc=false

 for i= 0 to ubound(nothis)
  for each items in request.Form
  if instr(request.Form(items),nothis(i))<>0 then
   response.write("<div>")
   response.write("你所填寫的資訊:" & server.HTMLEncode(request.Form(items)) & "<br>含非法字元:" & nothis(i))
   response.write("</div>")
   response.write("對不起,你所填寫的資訊含非法字元!<a href=""#"" onclick=""history.back()"">返回</a>")
   response.End()
  end if
  next
 next
end function
'==========================
'過濾查詢中的SQL
'==========================
function ForSqlInjection()
 dim fqys,errc,i
 dim nothis(19)
 fqys = request.ServerVariables("QUERY_STRING")
 nothis(0)="net user"

 nothis(1)="xp_cmdshell"

 nothis(2)="/add"

 nothis(3)="exec%20master.dbo.xp_cmdshell"

 nothis(4)="net localgroup administrators"

 nothis(5)="select"

 nothis(6)="count"

 nothis(7)="asc"

 nothis(8)="char"

 nothis(9)="mid"

 nothis(10)="'"

 nothis(11)=":"

 nothis(12)=""""

 nothis(13)="insert"

 nothis(14)="delete"

 nothis(15)="drop"

 nothis(16)="truncate"

 nothis(17)="from"

 nothis(18)="%"
 
 nothis(19)="@" 

 errc=false

 for i= 0 to ubound(nothis)

 if instr(FQYs,nothis(i))<>0 then

 errc=true

 end if

 next

 if errc then
 response.write "查詢資訊含非法字元!<a href=""#"" onclick=""history.back()"">返回</a>"
 response.end

 end if

end function



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