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这里提供了文件加密的一段小程序,以供大家参考. <%@ Language = VBScript%> <% Response.Expires = 0 p = "abcdefg" Set TestPWD = New CPassWord TestPWD.EnPWD p TestPWD.UnPWD TestPWD.ShowPWD(True) k = TestPWD.ShowPWD(True) l = TestPWD.ShowPWD(False) Set TestPWD = Nothing With Response .Write "原文:" & p & "<br>" .Write "加密后:" & k & "<br>" .Write "解密后:" & L & "<br>" End With Class CPassWord Private CEnPWD,CUnPWD Private Function My_Hex(My_Hex_Source) My_Hex = Hex(My_Hex_Source) If Len(My_Hex) = 1 Then My_Hex = "0" & My_Hex End If End Function Private Function My_UnHex(My_UnHex_Source) If Len(My_UnHex_Source) = 2 Then Temp_Value = My_HexReplace(Left(My_UnHex_Source,1)) End If My_UnHex = Temp_Value * 16 + My_HexReplace(Right(My_UnHex_Source,1)) End Function Private Function My_HexReplace(My_HexReplace_Source) If Asc(My_HexReplace_Source) > 64 Then My_HexReplace = Asc(UCase(My_HexReplace_Source)) - 55 Else My_HexReplace = Asc(My_HexReplace_Source) - 48 End If End Function Public Property Get ShowPWD(EnP) \\\' 输出 If EnP Then ShowPWD = CEnPWD Else ShowPWD = CUnPWD End If End Property Sub EnPWD(EnPWD_Source) if EnPWD_Source = "" then CEnPWD = 0 Exit Sub else Randomize Key = Rnd * 256 While Key = 0 Key = Rnd * 256 Wend For i=1 To Len(EnPWD_Source) Temp_String = Key Xor Asc(Mid(EnPWD_Source,i,1)) Crc = Crc + Temp_String CEnPWD = CEnPWD + My_Hex(Temp_String) Next CEnPWD = My_Hex(Key) + StrReverse(CEnPWD) + My_Hex(Crc Mod 256) End if End Sub Sub UnPWD(UnPWD_Source) If Len(UnPWD_Source) < 6 Or Len(UnPWD_Source) Mod 2 = 1 then CUnPWD = 0 Exit Sub End If Old_Key = My_UnHex(Left(UnPWD_Source,2)) Old_Crc = My_UnHex(Right(UnPWD_Source,2)) Old_String = StrReverse(Mid(UnPWD_Source,3,Len(UnPWD_Source)-4)) For i=1 To Len(Old_String) - 1 Step 2 Temp_Value = My_UnHex(Mid(Old_String,i,2)) Crc_Temp = Crc_Temp + Temp_Value Temp_String = Temp_String + Chr(Temp_Value Xor Old_Key) Next If Old_Crc <> (Crc_Temp Mod 256) Then CUnPWD = 403 Exit Sub End If CUnPWD = Temp_String End Sub End Class %> 返回类别: 教程 上一教程: 如何解密加密的ASP源代码 下一教程: 化境ASP无组件上传 您可以阅读与"给文件加密的一种方式"相关的教程: · 怎样给文件加密最安全(一种方式)？ · ASP实现隐藏网页代码的一种方式 · 新闻系统里防止产生垃圾图片的一种方式 · 利用HTTP组件来实现页面打印的一种方式 · 使用ASP实现文件上载(上传)的各种方式 |
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