Working in new code for DNIe card, I've found a problem: sc_transmit_apdu() must be overriden to allow secure messaging routine perform apdu wrapping when SM is on
I've coded a kind of "virtual channel" that hides SM issues from my code. Every sc_transmit_apdu() call is translated into dnie_transmit_apdu() that depending on sm status, encodes apdu an then redirects to real sc_transmit_apdu() Victor's SM trunk does something similar, but at lower level http://www.opensc-project.org/opensc/browser/branches/vtarasov/opensc-sm.trunk/src/libopensc/apdu.c ( Victor's code takes also care on apdu chainning when required, but that's not my case ) The problem arises when using standard iso7816 functions. For instance dnie_card_select_file() fully complains standard, so I'd like to use iso_ops->select_file().... but code at iso7816.c just call sc_transmit_apdu()... and SM wrapper won't be called. The only (and dirty) solution is clone iso_select_file() into my code An ideal solution for me (and for the other people that is working with SM cards) would be adding a new card operation "card_transmit_apdu()", that defaults in iso7816.c to sc_transmit_apdu(), but can be overriden when needed. Most card drivers can stay unchanged (bypassing wrapper), but iso7816.c should be rewritten to take care on redirection What's your opinion on this?. I can send you required patch for supporting card_operations->card_transmit_apdu() code Juan Antonio
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