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scd: One new and one improved 7816 function.

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* scd/apdu.c (apdu_send_direct): New arg R_SW.
* scd/command.c (cmd_apdu): Ditto.
* scd/iso7816.c (iso7816_apdu_direct): New arg R_SW.
(iso7816_general_authenticate): New.
* scd/app-nks.c (get_chv_status, get_nks_version): Pass NULL for new
arg.
--

iso7816_general_authenticate will be used for the PIV card support.
The new arg to iso7816_apdu_direct and apdu_send_direct allows to get
the raw status word back without the need to handle an output buffer.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 70bb5c7931)
This commit is contained in:
Werner Koch 2019-01-20 11:41:23 +01:00
parent 11a65159f9
commit 9309175de8
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
6 changed files with 90 additions and 27 deletions
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30
scd/apdu.c
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@ -3062,19 +3062,25 @@ apdu_send_simple (int slot, int extended_mode,
/* This is a more generic version of the apdu sending routine. It
takes an already formatted APDU in APDUDATA or length APDUDATALEN
and returns with an APDU including the status word. With
HANDLE_MORE set to true this function will handle the MORE DATA
status and return all APDUs concatenated with one status word at
the end. If EXTENDED_LENGTH is != 0 extended lengths are allowed
with a max. result data length of EXTENDED_LENGTH bytes. The
function does not return a regular status word but 0 on success.
If the slot is locked, the function returns immediately with an
error. */
* takes an already formatted APDU in APDUDATA or length APDUDATALEN
* and returns with an APDU including the status word. With
* HANDLE_MORE set to true this function will handle the MORE DATA
* status and return all APDUs concatenated with one status word at
* the end. If EXTENDED_LENGTH is != 0 extended lengths are allowed
* with a max. result data length of EXTENDED_LENGTH bytes. The
* function does not return a regular status word but 0 on success.
* If the slot is locked, the function returns immediately with an
* error.
*
* Out of historical reasons the function returns 0 on success and
* outs the status word at the end of the result to be able to get the
* status word in the case of a not provided RETBUF, R_SW can be used
* to store the SW. But note that R_SW qill only be set if the
* function returns 0. */
int
apdu_send_direct (int slot, size_t extended_length,
const unsigned char *apdudata, size_t apdudatalen,
int handle_more,
int handle_more, unsigned int *r_sw,
unsigned char **retbuf, size_t *retbuflen)
{
#define SHORT_RESULT_BUFFER_SIZE 258
@ -3281,9 +3287,13 @@ apdu_send_direct (int slot, size_t extended_length,
(*retbuf)[(*retbuflen)++] = sw;
}
if (r_sw)
*r_sw = sw;
if (DBG_CARD_IO && retbuf)
log_printhex (" dump: ", *retbuf, *retbuflen);
return 0;
}