David Corcoran wrote:
>
> Hi,
>
> I wish I could say I was "testing to see if anyone would notice" but it
> was my mistake. In fact I meant to change the instructions but it left me
> and I was in a hurry to release the first draft to get some feedback. Any
> other potential collisions ?
>
> Dave
>
> On Tue, 2 Oct 2001, Jean-Luc Giraud wrote:
>
> >
> > On Friday, September 7, 2001, at 04:33 PM, David Corcoran wrote:
> >
> > >
> > > Check it out and tell me what you think.
> >
> > Looking at the chosen instructions for the different commands, I have a
> > couple remarks:
> > A4 is a select command which is used on a Javacard to select Applet
> > C0 is the Get Response
> > B0 is Binary command (Read or Write, don't remember which)
I have a copy of 7816-4, but ....
there is also a CLA-Byte for command-select.
7816-4 reserved CLA 0x, 8x, 9x, Ax and B0-CF to be defined in this part.
The "x" in the CLA 0x/8x/9x is for secure messaging and multi logical
channels. ( 10-7F are RFU )
Corresponding to ISO7816-4 (5.4.1) a card can activate with all CLA from
above and a INS=A4 with a select, but i know no card with will be do it
with an other then CLA=00, or not?
When we change to CLA D0-FE, we could have also problems with programmed
cards, like card-loading functions.
(D0-FE are for proprietary structure and coding of commands)
But ;-)) the range 10-7F for CLA is RFU..
If your CSP will be standard, we are at the right place, or not? ;-)))
Has anybody a card, with will be response to an ISO-Command with an other
then 0x ??
I am using CLA B1-B3 for my commands.
> >
> > Maybe it would be good to avoid these standard instructions.
> > Could anybody who has a copy of ISO7816-4 check other possible
> > collisions?
> >
> > JLuc.
--
Robert Valentan
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