[Muscle] How can I know what's the type of a card through it's ATR?

[Michael Bender]

On Jan 14, 2009, at 11:32 PM, lion wrote:

> > http://www.nagravision.com/
> > It should be a pay-tv card. One of the more secret cards.
>
> > I don't think you can do anything with this card (except watch  
> TV). In
> > general, the game is to create faked pay-tv cards not try to use a
> > real one.
>
> Yes, that's right. It's used in our set-top box(STB).
> I just try to do some base firmware tests now. And may be added  
> supports under OpenCT later.
>
> I changed a card and readed out the ATR:
> TS: 3f	T0: ff	TA1:95	TB1:00	TC1: ff	TD1: 91	TA2: 81	TD2:71	TA3:a0	 
> TB3:47 	TC3:00
> History: 44     4e   41    53    50   30   20   54   65   73   74    
> 30   33
>
> So, It should be a nagravision card , and there may be  some unknow  
> problems in the former card i used.
>
> But I got a new problem.
> The TD1 in the ATR is 0x91, so only protocol T=1 is supported.
> And TA1 is 0x95,  that means Fi=9, Di=5,not Fd=Dd=1 any more.
> And TA2 is 0x81,  means that it's Specific mode.and it's bit5=0.
>
> Then whether I needed sending PTS to select protocol T=1 after  
> receiving ATR ?

Nope, if the card only says it supports T=1 then you need to only talk  
to it with
T=1 protocol. I don't think that sending PTS to try to change it to  
something else
will work.

> If needed, how to send it ?
> Because   "ISO7816 3.4 Protocol type selection (PTS) "  said  "If  
> only one protocol type and FI=D=1 (default value of TA1) and N  
> smaller than 255 is indicated in the answer to reset. The  
> transmission protocol associated to the protocol type may be started  
> immediately after the transmission of answer to reset. "
> So, I can't send PTS because Fi=9 and Di=5, and N=0xff.
>
> If not, the following operations such as SELECT FILE use which F and  
> D(Fi, Di or Fd, Dd) ?
>
> I did'not found clear answers in ISO7916-3 about these things. May  
> be I shoule read it once more.

This was my point about 7816 ;-(

But, you are stuck using T=1 if that's all that the card will support.

T=1 is an annoying protocol. Actually, having all the T=xxx protocols  
is annoying, and shows once
again the lack of cooperation in the smartcard industry.

Here's how the world shakes out:

     T=0 : French
     T=1 : German

Once you understand that the smartcard technology was predicated on  
long-standing
nationalistic rivalries, it all becomes clear ;-)

> > Oh, if you want *my* advice - I would get into pig farming rather  
> than smartcard programming,
> > it's a lot more rewarding and you can bring home the bacon at the  
> end of the day ;-)
>
> A ha, You have a good sense of humor. But sometimes it's no choice.

Being a pig farmer is always a choice!

mike