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Add crc check.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos 2023-03-30 23:44:37 +02:00
parent 0bfa760903
commit da04fbb824
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2 changed files with 13 additions and 6 deletions
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2
pico-hsm-sdk

@ -1 +1 @@
Subproject commit 3947b59881d42ef75257908001f538e3becdd596
Subproject commit 38fb8018e68011af14c1320f89ad27cfc89d62ab

17
src/fido/otp.c
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@ -208,7 +208,13 @@ int otp_unload() {
return CCID_OK;
}
static bool scanned = false;
extern void scan_all();
uint16_t otp_status() {
if (scanned == false) {
scan_all();
scanned = true;
}
res_APDU_size = 0;
res_APDU[1] = PICO_FIDO_VERSION_MAJOR;
res_APDU[2] = PICO_FIDO_VERSION_MINOR;
@ -223,21 +229,22 @@ uint16_t otp_status() {
return SW_OK();
}
bool check_crc(const otp_config_t *data) {
uint16_t crc = calculate_crc((const uint8_t *)data, otp_config_size);
return crc == 0xF0B8;
}
int cmd_otp() {
uint8_t p1 = P1(apdu), p2 = P2(apdu);
if (p2 != 0x00) {
return SW_INCORRECT_P1P2();
}
if (p1 == 0x01 || p1 == 0x03) { // Configure slot
/*if (apdu.nc != otp_config_size + ACC_CODE_SIZE) {
return SW_WRONG_LENGTH();
}*/
otp_config_t *odata = (otp_config_t *)apdu.data;
if (odata->rfu[0] != 0 || odata->rfu[1] != 0) {
if (odata->rfu[0] != 0 || odata->rfu[1] != 0 || check_crc(odata) == false) {
return SW_WRONG_DATA();
}
file_t *ef = file_new(p1 == 0x01 ? EF_OTP_SLOT1 : EF_OTP_SLOT2);
printf("has data %d\n",file_has_data(ef));
if (file_has_data(ef)) {
otp_config_t *otpc = (otp_config_t *) file_get_data(ef);
if (memcmp(otpc->acc_code, apdu.data + otp_config_size, ACC_CODE_SIZE) != 0) {