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Bug #4744

closed

excess bytes beyond end of response TPDU / SW if Lc=0 / Le=0

Added by laforge over 3 years ago. Updated over 3 years ago.

Status:
Resolved
Priority:
Urgent
Assignee:
Target version:
-
Start date:
09/02/2020
Due date:
% Done:

100%

Spec Reference:

Description

If P3 is 0 and there is no command nor response data (only a status word to be returned), we seem to be passing tons of extraneous zero-initialized bytes to the reader:

[003 CONN_CLIENT_MAPPED_CARD] bankd_main.c:761 Rx RSPRO tpduModemToCard
[003 CONN_CLIENT_MAPPED_CARD] bankd_main.c:701 tpduModemToCard(80f2000c00)
[003 CONN_CLIENT_MAPPED_CARD] bankd_pcsc.c:221 : OK
[003 CONN_CLIENT_MAPPED_CARD] bankd_main.c:727 tpduModemToCard response from card: 6b0b0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
Actions #1

Updated by laforge over 3 years ago

  • Priority changed from Normal to Urgent

This can also be reproduced when sending a related APDU manually:

(ISO 7816-4) > 80f2000c00
--------------------------------------------------------------------------------
Beginning transaction 0
>> 0000:  80 f2 00 0c 00                                    .....           
<< 0000:  4f a4 00 00 00 00 00 00 00 00 00 00 00 00 00 00   O...............
   0010:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
   0020:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
   0030:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
   0040:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
   0050:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
   0060:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
   0070:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
   0080:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
   0090:  00                                                .               
Ending transaction 0
--------------------------------------------------------------------------------

0000:  4f a4 00 00 00 00 00 00 00 00 00 00 00 00 00 00   O...............
0010:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0020:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0030:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0040:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0050:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0060:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0070:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0080:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00      ............... 
Unknown SW (SW 0000), 0.146s

When using teh same APDU on a different reader, we get:

(ISO 7816-4) > 80f2000c00
--------------------------------------------------------------------------------
Beginning transaction 0
>> 0000:  80 f2 00 0c 00                                    .....           
<< 0000:  90 00                                             ..              
Ending transaction 0
--------------------------------------------------------------------------------

Normal execution (SW 9000), 0.0414s

Actions #2

Updated by laforge over 3 years ago

  • Status changed from New to In Progress
  • % Done changed from 0 to 80
Actions #3

Updated by laforge over 3 years ago

with that fix applied:

(ISO 7816-4) > 80f2000c00
--------------------------------------------------------------------------------
Beginning transaction 0
>> 0000:  80 f2 00 0c 00                                    .....           
<< 0000:  90 00                                             ..              
Ending transaction 0
--------------------------------------------------------------------------------

Normal execution (SW 9000), 0.144s

Actions #4

Updated by laforge over 3 years ago

  • Status changed from In Progress to Resolved
  • % Done changed from 80 to 100

fix merged.

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