Hi,

I completly agree with Andreas. Get Response is
dependant on T=0 transport protocol and must not be
handled at application level. This is at least what
ISO 7816 says.

Towitoko driver 2.0.X handles authomatically the Get
Response when the command is Case 3 or Case 4. Also
the issues athomatically the Envelope command and
cares of extended commands (more that 255 bytes
sent/received).

--- Andreas Schwier <andreas.schwiercardcontact.de>
wrote:
> > Most of the drivers pass the 61 XX back to the
> application to handle. I
> > think it is bad practice to handle this in the
> driver since it is a card
> > specific ISO function.
>
> GET RESPONSE is a transport level command. It should
> therefore be invisible
> for the application. The problem arises if you write
> applications that work
> with cards that support either T=0 or T=1 transport
> via PPS. If the reader
> hardware is capable of doing either T=0 or T=1, then
> the application always
> would need to know what protocol is used. If it is
> T=0, then it would need
> to send GET RESPONSE, if it is T=1 then it would not
> send a GET RESPONSE.
>
> ISO7816-4 was specifically rewritten at some point
> in time to eliminate
> dependencies on T=0. ISO7816-4 now defines command
> and response APDU in the
> first part and defines the mapping of these APDUs
> onto T=0 or T=1 transport
> in the annex.
>
> Andreas
>
>
***************************************************************
> Linux Smart Card Developers - M.U.S.C.L.E.
> (Movement for the Use of Smart Cards in a Linux
> Environment)
> http://www.linuxnet.com/smartcard/index.html
>
***************************************************************

__________________________________________________
Do You Yahoo!?
Make international calls for as low as $.04/minute with Yahoo! Messenger
http://phonecard.yahoo.com/
***************************************************************
Linux Smart Card Developers - M.U.S.C.L.E.
(Movement for the Use of Smart Cards in a Linux Environment)
http://www.linuxnet.com/smartcard/index.html
***************************************************************

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]