SQL注入这很好

Question

我对此做了很多研究,但我仍然有一个问题需要理解它.但是我想确保我受到适当的保护.我在Classic ASP中编写了一个函数来帮助防止SQL注入或可能对数据库施加暴力.如果我需要添加或删除内容甚至更正问题以使其更安全,您能否给我自己的意见和建议？非常感谢你提前!!

我在插入MySQL数据库之前使用下面这个.

插入示例:

conn.execute("INSERT INTO " & employees & "(eid, first_name, last_name) VALUES('" & Clng(strEID) & "','" & SQLClean(strfirstname) & "','" & SQLClean(strlastname) & "');")

功能:

Private Function SQLClean(ByVal strString)
    If strString <> "" Then
        strString = Trim(strString)

        'Remove malisous charcters from sql\
        strString = replace(strString,"-shutdown","", 1, -1, 1)
        strString = replace(strString,"\","\\", 1, -1, 1)
        strString = replace(strString,"=","\=", 1, -1, 1)
        strString = replace(strString,",","\,", 1, -1, 1)
        strString = replace(strString,"`","\`", 1, -1, 1)
        strString = replace(strString,"&","\&", 1, -1, 1)
        strString = replace(strString,"/","\/", 1, -1, 1)      
        strString = replace(strString,"[","\[", 1, -1, 1)
        strString = replace(strString,"]","\]", 1, -1, 1)
        strString = replace(strString,"{","\{", 1, -1, 1)
        strString = replace(strString,"}","\}", 1, -1, 1)
        strString = replace(strString,"(","\(", 1, -1, 1)
        strString = replace(strString,")","\)", 1, -1, 1)
        strString = replace(strString,";","\;", 1, -1, 1)
        strString = replace(strString,"+","\+", 1, -1, 1)
        strString = replace(strString,"<","\<", 1, -1, 1)
        strString = replace(strString,">","\>", 1, -1, 1)
        strString = replace(strString,"^","\^", 1, -1, 1)
        strString = replace(strString,"@","\@", 1, -1, 1)
        strString = replace(strString,"$","\$", 1, -1, 1)
        strString = replace(strString,"%","\%", 1, -1, 1)
        strString = replace(strString,"!","\!", 1, -1, 1)
        strString = replace(strString,"*","\*", 1, -1, 1)
        strString = replace(strString,"~","\~", 1, -1, 1)
        strString = replace(strString,"#","\#", 1, -1, 1)
        strString = replace(strString,"?","\?", 1, -1, 1)
        strString = replace(strString,"'","\'", 1, -1, 1)
        strString = replace(strString,"""","\""", 1, -1, 1)
        strString = replace(strString,"select","\select", 1, -1, 1)
        strString = replace(strString,"insert","\insert", 1, -1, 1)
        strString = replace(strString,"update","\update", 1, -1, 1)
        strString = replace(strString,"delete","\delete", 1, -1, 1)
        strString = replace(strString," or "," \or ", 1, -1, 1)
        strString = replace(strString," and "," \and ", 1, -1, 1)
        strString = replace(strString,"drop","\drop", 1, -1, 1)
        strString = replace(strString,"union","\union", 1, -1, 1)
        strString = replace(strString,"into","\into", 1, -1, 1)

        'Return cleaned value.
        SQLClean = Trim(strString)

    End If
End Function

Answer 1

请不要在任何情况下尝试编写自己的SQL转义代码,除非它纯粹是一个学术练习.你会弄错的.如果有人在您的网站上使用SQL注入攻击工具,您将遭受严重后果.那些采取随意方法的人已经破坏了企业和职业.

我花了三分钟时间在StackOverflow上找到一个关于使用参数讨论Classic ASP和MySQL查询的示例.

请,请,请使用官方的设施,不滚你自己的.