a problematic sim?

[Lukas Kuzmiak]

Hi Holger,

ATR of that card from a pcsc reader:

Reader 0: Gemalto GemPC Twin 00 00
Card state: Card inserted,
ATR: 3B 16 95 D0 00 45 F7 01 00

seems to be much shorter than usual ATR I've seen, but _all_ o2-cz and
o2-sk, postpaid, prepaid have that same ATR (since like 2-3 yrs old till
few months ago - meaning bought from o2).

wasn't so sure where to stick the hex-dump so I've put it into main.c,
process_usb_msg, diff is below just in case you need to be sure about the
exact location.
trace i got is attached, it seems some of the APDU data are getting marked
as part of ATR with SIMTRACE_FLAG_ATR flag and since then all the data
don't make sense to the parser anymore (imho).

Cheers,
Lukas

diff --git a/host/main.c b/host/main.c
index 4fbac8d..377868a 100644
--- a/host/main.c
+++ b/host/main.c
@@ -92,6 +92,7 @@ static int process_usb_msg(uint8_t *buf, int len)

        switch (sh->cmd) {
        case SIMTRACE_MSGT_DATA:
+               printf("dump: %s\n", osmo_hexdump(payload, payload_len));
                /* special treatment for ATR */
                if (sh->flags & SIMTRACE_FLAG_ATR) {
                        printf("ATR ");




On Thu, Dec 15, 2011 at 10:48 PM, Holger Hans Peter Freyther <
holger at freyther.de> wrote:

> On 12/15/2011 10:24 PM, Lukas Kuzmiak wrote:
>
> >
> > - I've put one printf() into the apdu_split_in method, it seems the
> buffer is
> > somehow getting scrambled from the beginning, it shows something like:
>
> Hi,
> so let me claim the issue is in our split method... could you generate the
> hexdump of the bytes added? we could then feed APDU split ourselves. The
> other
> part would be, do you have a PCSC Card reader? you could send us the ATR as
> reportede by pcsc_scan.
>
>
>
>
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dump: 3b 16 95 d0 00 45 f7 01 00 a0 a4 00 00 02 a4 7f 20 9f 20 a0 c0 00 00 20 c0 00 00 00 00 7f 20 02 00 00 00 00 00 13 33 00 18 04 00 83 8a 83 8a 00 01 00 00 06 fd 00 00 00 00 90 00 a0 a4 00 00 02 a4 3f 00 9f 20 a0 a4 00 00 02 a4 7f 20 9f 20 a0 c0 00 00 16 c0 00 00 00 00 7f 20 02 00 00 00 00 00 13 33 00 18 04 00 83 8a 83 8a 90 00 a0 a4 00 00 02 a4 6f b7 94 04 a0 a4 00 00 02 
ATR APDU: 3b 16 95 d0 00 45 f7 01 00 a0 a4 00 00 02 a4 7f 20 9f 20 a0 c0 00 00 20 c0 00 00 00 00 7f 20 02 00 00 00 00 00 13 33 00 18 04 00 83 8a 83 8a 00 01 00 00 06 fd 00 00 00 00 90 00 a0 a4 00 00 02 a4 3f 00 9f 20 a0 a4 00 00 02 a4 7f 20 9f 20 a0 c0 00 00 16 c0 00 00 00 00 7f 20 02 00 00 00 00 00 13 33 00 18 04 00 83 8a 83 8a 90 00 a0 a4 00 00 02 a4 6f b7 94 04 a0 a4 00 00 02 
dump: a4 6f 05 9f 0f a0 c0 00 00 0f c0 00 00 00 04 6f 05 04 00 01 00 44 01 02 00 00 90 00 a0 b0 00 00 04 b0 20 01 00 03 90 00 a0 a4 00 00 02 a4 6f 13 94 04 a0 a4 00 00 02 a4 6f 16 94 04 
APDU: a4 6f 05 9f 0f a0 c0