Hello,
--- Jim Rees <[EMAIL PROTECTED]> wrote:
> > - How do I find out about the length of an ATR ?
> The towitoko driver
> By parsing it.
>
> This is a less than satisfactory solution. It works
> if the card strictly
> complies with 7816, but it's nice to know if the
> card has returned too many
> or too few bytes, as some do.
>
Towitoko Ct-api driver *does* return actual size of
the ATR. Also it permits retrieve the full ATR,
historical bytes of the ATR, or just card
card reset status, as described in CT-BCS
specification, sending appropriate CT-BCS commands.
The IFD_Handler is the part of the resource manager
that introduces 0x00 padding bytes and returns Atr
length = MAX_ATR_SIZE. This is the part of
IFD_Handler.c that returns the ATR:
// ...
} else if ( HighNibble == 0x03 ) { /* This is
the ICC_STATE */
switch( LowNibble ) {
// ...
case 0x03:
memcpy(Value, ICC.ATR, MAX_ATR_SIZE);
lRetVal = IFD_SUCCESS;
break;
// ...
Maybe this should be corrected, so it returns ATR
length as it's given by ct-api driver. But it has to
be done for all reader drivers (I think IFD Handler is
the same for all readers). Not only for Towitoko
driver.
> I have a T=1 protocol driver in my own library.
> About 600 lines.
> You could try to include it in MUSCLE.
>
> Is this for the Towitoko reader, or would it have to
> be modified to work
> with Carlos's driver? I would very much like to see
> T=1 for Towitoko.
>
T=1 protocol is far from being trivial to implement if
the reader hardware does not implement communication
protocol with the card, as happens with Towitoko's.
Maybe we should have a common GPL implementation of
T=1, using generic I/O routines to comunicate with the
card, so that it could be reused for every driver of
the MUSCLE.
Thanks,
Carlos.
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