About Smart Card Minidriver Filter Driver(SCFILTER)

NTDEV
1

I have a reader, It works well in XP and Windows 7 except an issue about the SCFILTER filter driver.
An new hardware will be find when I insert a card to reader, The HardwareIds is variable, It is “SCFILTER\CID_ffffffff” when you insert a memory card(24c01), It is “SCFILTER\CID_5744296412072b31” if you insert another CPU card.
Everything is ok if I remove the UpperFilters(SCFILTER) from register,
My question is :
1, Why the HardwareIds is variable? Is it a bug in my driver? And how to fix it?
2, How can I install my driver with a SCFILTER UpperFilter driver, It is possible to do it by fix my inf file?.

I can’t remove the filter driver because that some driver will be install it, For example WUDFRd will be install it(“Microsoft Usbccid Smartcard Reader(WUDF)”).

The issuse looks like the follow thread
http://www.osronline.com/showThread.cfm?link=158840, I have reader, This thread is no use for me.

Thank you

2

Hi Allen Zhang,

My question is :
1, Why the HardwareIds is variable? Is it a bug in my driver? And how to fix it?

Yes the HID is different before you have used different smartcard.
I suppose the CID_XXXXX represent the “Card Identifier” stored in the ATR and/Or the Card.
The CID is identified if your reader authentify the smartcard used ( CSP need to be stored by microsoft, example with dotNet card ).

2, How can I install my driver with a SCFILTER UpperFilter driver, It is possible to do it by fix my
inf file?.

I don’t know if it’s possible, because the SCFilter is certified ( .CAT needed) and you can just add one .cat file per driver package.

Any expert for confirm my answer.

I hope to help you,

Best regards,

Moulefrite

3

If the SCFilter upper filter driver does not install it because the card was not recognized ( check your usb analyser for visualyze the APDU Command sended by the upper filter for recognyze the smartcard inserted ).

Best regards,

Moulefrite

4

Moulefrite,

Thank you for you answer,

Best regards,

Allen