asp 实现对SQL注入危险字符进行重编码处理的函数
时间:2019-10-11 10:47 来源/作者:阿里西西
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<%
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'******************************
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'函数:CheckStr(byVal ChkStr)
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'参数:ChkStr,待验证的字符
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'作者:阿里西西
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'日期:2007/7/15
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'描述:对SQL注入危险字符进行重编码处理
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'示例:CheckStr("and 1=1 or select * from")
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'******************************
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Function CheckStr(byVal ChkStr)
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Dim Str:Str=ChkStr
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Str=Trim(Str)
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If IsNull(Str) Then
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CheckStr = ""
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Exit Function
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End If
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Dim re
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Set re=new RegExp
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re.IgnoreCase =True
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re.Global=True
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re.Pattern="(\r\n){3,}"
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Str=re.Replace(Str,"$1$1$1")
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Set re=Nothing
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Str = Replace(Str,"'","''")
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Str = Replace(Str, "select", "select")
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Str = Replace(Str, "join", "join")
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Str = Replace(Str, "union", "union")
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Str = Replace(Str, "where", "where")
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Str = Replace(Str, "insert", "insert")
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Str = Replace(Str, "delete", "delete")
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Str = Replace(Str, "update", "update")
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Str = Replace(Str, "like", "like")
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Str = Replace(Str, "drop", "drop")
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Str = Replace(Str, "create", "create")
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Str = Replace(Str, "modify", "modify")
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Str = Replace(Str, "rename", "rename")
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Str = Replace(Str, "alter", "alter")
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Str = Replace(Str, "cast", "cast")
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CheckStr=Str
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End Function
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'反编上面函数处理过的字符串
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Function UnCheckStr(Str)
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Str = Replace(Str, "select", "select")
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Str = Replace(Str, "join", "join")
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Str = Replace(Str, "union", "union")
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Str = Replace(Str, "where", "where")
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Str = Replace(Str, "insert", "insert")
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Str = Replace(Str, "delete", "delete")
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Str = Replace(Str, "update", "update")
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Str = Replace(Str, "like", "like")
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Str = Replace(Str, "drop", "drop")
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Str = Replace(Str, "create", "create")
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Str = Replace(Str, "modify", "modify")
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Str = Replace(Str, "rename", "rename")
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Str = Replace(Str, "alter", "alter")
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Str = Replace(Str, "cast", "cast")
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UnCheckStr=Str
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End Function
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%>
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