防注入|解决<%

'ASP防注入之解决方案
'特殊页面处理
'因为有些页通过流式传递(比如含有文件上传的表单)
'如果单一使用穷举Form对象的操作就会出错
'所以要把这些页面过滤出来,同时在页面中使用sql("检测的字串")才行
'垃圾猪zeronew57.com
'http://blog.csdn.net/cfaq



'将本页用include方法放在头部以让所有页都可以调用,比如include在conn.asp里
'如果有流式上传的页面请把该页加到表page中,以防form冲突


Dim N_no,N_noarray,req_Qs,req_F,N_i,N_dbstr,Conn,N_rs,N_userIP,N_thispage
N_userip = Request.ServerVariables("REMOTE_ADDR")
N_thispage = LCase(Request.ServerVariables("URL"))

N_no = "'|;|and|exec|insert|select|delete|update|count|*|%|chr|mid|master|truncate|char|declare" '可以自己修改怀疑是注入操作的字串
N_noarray = split(LCase(N_no),"|")


Call DBopen()
Call N_check_Qs()
Call N_checkPage()
Call DBCLose()


'检测当前页是否是特殊页是就调用 N_check_form()
sub N_checkPage()

set N_rs = server.CreateObject("ADODB.RecordSet")
N_rs.open "select * from page where spcpage like '%"&N_thispage&"%'",conn,1,1
if (N_rs.eof AND N_rs.Bof) then
Call N_check_form()
end if
N_rs.Close()
set N_rs = nothing

end sub



'检测给定字串
sub N_sql(agsql)
'这里是不记录数据库,如果要改请自己修改
N_check "CUS",req_Qs,"OTHER"
end sub

'检测Request.Form
sub N_check_form()
If Request.Form<>"" Then
For Each req_F In Request.Form
N_check req_F,Request.Form(req_F),"POST"
Next
end if
end sub

'检测Request.QueryString
sub N_check_Qs()
If Request.QueryString<>"" Then
For Each req_Qs In Request.QueryString
N_check req_Qs,Request.QueryString(req_Qs),"GET"
Next
end if
end sub

'检测
sub N_check(ag,agsql,sqltype)
For N_i=0 To Ubound(N_noarray)
If Instr(LCase(agsql),N_noarray(N_i))<>0 Then
call N_regsql(ag,agsql,sqltype)
Response.Write "MO"
end if
Next
end sub

'记录并停止输出
'ag 名称
'agsql 内容
'sqltype 类型
sub N_regsql(ag,agsql,sqltype)
if(sqltype<>"OTHER") then
Conn.Execute("insert into SqlIn(Sqlin_IP,SqlIn_Web,SqlIn_FS,SqlIn_CS,SqlIn_SJ) values('"&N_userip&"','"&N_thispage&"','"&sqltype&"','"&ag&"','"&agsql&"')")
end if
Response.Write "<Script Language=JavaScript>alert('请不要在参数中包含非法字符尝试注入！');</Script>"
Response.Write "<span Response.Write "操作ＩＰ："&N_userip&"
"
Response.Write "操作时间："&Now&"
"
Response.Write "操作页面："&N_thispage&"
"
Response.Write "提交方式："&sqltype&"
"
Response.Write "提交参数："&ag&"
"
Response.Write "提交数据："&agsql&"</span>"

Response.end
end sub


Sub DBopen()
N_dbstr="DBQ="+server.mappath("Sql.mdb")+";DefaultDir=;DRIVER={Microsoft Access Driver (*.mdb)};"
Set Conn=Server.CreateObject("ADODB.CONNECTION")
Conn.open N_dbstr
end SUB


Sub DBCLose()
Conn.close
Set Conn = Nothing
End sub
%>