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SCARD: Add function for fetching PIN retry counter

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Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2012-03-03 13:51:34 +02:00
parent a8f3bfc421
commit 67303a5479
2 changed files with 45 additions and 2 deletions
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43
src/utils/pcsc_funcs.c
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@ -654,7 +654,8 @@ struct scard_data * scard_init(scard_sim_type sim_type, const char *reader)
}
if (pin_needed) {
scard->pin1_required = 1;
wpa_printf(MSG_DEBUG, "PIN1 needed for SIM access");
wpa_printf(MSG_DEBUG, "PIN1 needed for SIM access (retry "
"counter=%d)", scard_get_pin_retry_counter(scard));
}
ret = SCardEndTransaction(scard->card, SCARD_LEAVE_CARD);
@ -1011,6 +1012,46 @@ static int scard_verify_pin(struct scard_data *scard, const char *pin)
}
int scard_get_pin_retry_counter(struct scard_data *scard)
{
long ret;
unsigned char resp[3];
unsigned char cmd[5] = { SIM_CMD_VERIFY_CHV1 };
size_t len;
u16 val;
wpa_printf(MSG_DEBUG, "SCARD: fetching PIN retry counter");
if (scard->sim_type == SCARD_USIM)
cmd[0] = USIM_CLA;
cmd[4] = 0; /* Empty data */
len = sizeof(resp);
ret = scard_transmit(scard, cmd, sizeof(cmd), resp, &len);
if (ret != SCARD_S_SUCCESS)
return -2;
if (len != 2) {
wpa_printf(MSG_WARNING, "SCARD: failed to fetch PIN retry "
"counter");
return -1;
}
val = WPA_GET_BE16(resp);
if (val == 0x63c0 || val == 0x6983) {
wpa_printf(MSG_DEBUG, "SCARD: PIN has been blocked");
return 0;
}
if (val >= 0x63c0 && val <= 0x63cf)
return val & 0x000f;
wpa_printf(MSG_DEBUG, "SCARD: Unexpected PIN retry counter response "
"value 0x%x", val);
return 0;
}
/**
* scard_get_imsi - Read IMSI from SIM/USIM card
* @scard: Pointer to private data from scard_init()