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%
'******************************
'函數(shù)：CheckStr(byVal ChkStr)
'參數(shù)：ChkStr,待驗證的字符
'作者：阿里西西
'日期：2007/7/15
'描述：對SQL注入危險字符進行重編碼處理
'示例：CheckStr("and 1=1 or select * from")
'******************************
Function CheckStr(byVal ChkStr)
Dim Str:Str=ChkStr
Str=Trim(Str)
If IsNull(Str) Then
  CheckStr = ""
  Exit Function
End If
Dim re
Set re=new RegExp
re.IgnoreCase =True
re.Global=True
re.Pattern="(\r\n){3,}"
Str=re.Replace(Str,"$1$1$1")
Set re=Nothing
Str = Replace(Str,"'","''")
Str = Replace(Str, "select", "sel#101;ct")
Str = Replace(Str, "join", "jo#105;n")
Str = Replace(Str, "union", "un#105;on")
Str = Replace(Str, "where", "wh#101;re")
Str = Replace(Str, "insert", "ins#101;rt")
Str = Replace(Str, "delete", "del#101;te")
Str = Replace(Str, "update", "up#100;ate")
Str = Replace(Str, "like", "lik#101;")
Str = Replace(Str, "drop", "dro#112;")
Str = Replace(Str, "create", "cr#101;ate")
Str = Replace(Str, "modify", "mod#105;fy")
Str = Replace(Str, "rename", "ren#097;me")
Str = Replace(Str, "alter", "alt#101;r")
Str = Replace(Str, "cast", "ca#115;t")
CheckStr=Str
End Function

'反編上面函數(shù)處理過的字符串

Function UnCheckStr(Str)
  Str = Replace(Str, "sel#101;ct", "select")
  Str = Replace(Str, "jo#105;n", "join")
  Str = Replace(Str, "un#105;on", "union")
  Str = Replace(Str, "wh#101;re", "where")
  Str = Replace(Str, "ins#101;rt", "insert")
  Str = Replace(Str, "del#101;te", "delete")
  Str = Replace(Str, "up#100;ate", "update")
  Str = Replace(Str, "lik#101;", "like")
  Str = Replace(Str, "dro#112;", "drop")
  Str = Replace(Str, "cr#101;ate", "create")
  Str = Replace(Str, "mod#105;fy", "modify")
  Str = Replace(Str, "ren#097;me", "rename")
  Str = Replace(Str, "alt#101;r", "alter")
  Str = Replace(Str, "ca#115;t", "cast")
  UnCheckStr=Str
End Function
%>

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