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Comparing appId with bogus apps.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
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Pol Henarejos
2022-09-27 22:10:31 +02:00
parent 1835afe54a
commit 7a4be766bc
1 changed files with 6 additions and 0 deletions
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6
src/fido/cmd_register.c
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@@ -23,6 +23,10 @@
#include "random.h"
#include "files.h"
const uint8_t *bogus_firefox = (const uint8_t *)"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";
const uint8_t *bogus_chrome = (const uint8_t *)"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
extern int ctap_error(uint8_t error);
int cmd_register() {
CTAP_REGISTER_REQ *req = (CTAP_REGISTER_REQ *)apdu.data;
CTAP_REGISTER_RESP *resp = (CTAP_REGISTER_RESP *)res_APDU;
@@ -34,6 +38,8 @@ int cmd_register() {
return SW_WRONG_LENGTH();
if (wait_button_pressed() == true)
return SW_CONDITIONS_NOT_SATISFIED();
if (memcmp(req->appId, bogus_firefox, CTAP_APPID_SIZE) == 0 || memcmp(req->appId, bogus_chrome, CTAP_APPID_SIZE) == 0)
return ctap_error(CTAP1_ERR_CHANNEL_BUSY);
mbedtls_ecdsa_context key;
mbedtls_ecdsa_init(&key);
int ret = derive_key(req->appId, true, resp->keyHandleCertSig, MBEDTLS_ECP_DP_SECP256R1, &key);