dearsky/pico-fido
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Added user presence flag and global counter on authentication.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2022-09-07 20:03:34 +02:00
parent d6c9077b02
commit b178b139fb
4 changed files with 25 additions and 3 deletions
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14
src/fido/cmd_authenticate.c
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@@ -62,9 +62,13 @@ int cmd_authenticate() {
return SW_WRONG_DATA();
return SW_CONDITIONS_NOT_SATISFIED();
}
resp->flags = 0x1;
resp->ctr[0] = 0;
uint8_t hash[32], sig_base[U2F_APPID_SIZE+1+4+U2F_CHAL_SIZE];
resp->flags = P1(apdu) == 0x03 ? 0x1 : 0x0;
uint32_t ctr = *(uint32_t *)file_get_data(ef_counter);
resp->ctr[0] = ctr >> 24;
resp->ctr[1] = ctr >> 16;
resp->ctr[2] = ctr >> 8;
resp->ctr[3] = ctr & 0xff;
uint8_t hash[32], sig_base[U2F_APPID_SIZE + 1 + 4 + U2F_CHAL_SIZE];
memcpy(sig_base, req->appId, U2F_APPID_SIZE);
memcpy(sig_base+U2F_APPID_SIZE, &resp->flags, sizeof(uint8_t));
memcpy(sig_base + U2F_APPID_SIZE + 1, resp->ctr, 4);
@@ -80,5 +84,9 @@ int cmd_authenticate() {
if (ret != 0)
return SW_EXEC_ERROR();
res_APDU_size = 1 + 4 + olen;
ctr++;
flash_write_data_to_file(ef_counter, (uint8_t *)&ctr, sizeof(ctr));
low_flash_available();
return SW_OK();
}