mirror of
https://gitea.osmocom.org/sim-card/simtrace2.git
synced 2026-11-08 17:45:59 +03:00
Alexander Couzens
63a61bfdaf
osmo_apdu_segment_in() doesn't have the context of the previous APDU,
for nearly all calls this is fine, except for GP GET DATA, which can be
a case 2 or case 4 APDU.
GP GET DATA defines the Le field as 0x00 which is used by osmo_apdu_segment_in
to detect if it is a case 2 or case 4.
However a card can respond with the SW 6cXX, which means the previous
command must be resend with a Le field XX, which got misinterpreted by
the osmo_apdu_segment_in() as a case 4 resulting in a timeout waiting for
more data.
Modem <-> Card
81cadf2000 ->
<- 6c0b
81cadf200b ->
-- Simtrace waits for more data because it wrongly decodes it as APDU case 4
instead of case 2.
Related: SYS#8147
Change-Id: Ie238662e7e6a10dd4283ede0c8d8d73bc375c247
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/* apdu_dispatch - State machine to determine Rx/Tx phases of APDU
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*
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* (C) 2016-2019 by Harald Welte <hwelte@hmw-consulting.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#pragma once
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#include <stdint.h>
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#include <stdbool.h>
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#include <osmocom/sim/sim.h>
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struct osmo_apdu_context {
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struct osim_apdu_cmd_hdr hdr;
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uint8_t dc[256];
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uint8_t de[256];
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uint8_t sw[2];
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uint8_t apdu_case;
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struct {
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uint8_t tot;
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uint8_t cur;
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} lc;
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struct {
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uint8_t tot;
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uint8_t cur;
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} le;
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};
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enum osmo_apdu_action {
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APDU_ACT_TX_CAPDU_TO_CARD = 0x0001,
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APDU_ACT_RX_MORE_CAPDU_FROM_READER = 0x0002,
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};
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const char *osmo_apdu_dump_context_buf(char *buf, unsigned int buf_len,
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const struct osmo_apdu_context *ac);
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int osmo_apdu_segment_in(struct osmo_apdu_context *ac, const uint8_t *apdu_buf,
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unsigned int apdu_len, bool new_apdu);
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int osmo_apdu_segment_in2(struct osmo_apdu_context *ac, struct osmo_apdu_context *prev_ac,
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const uint8_t *apdu_buf, unsigned int apdu_len, bool new_apdu);
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