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Fix empty challenge.

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Now a new fresh challenge is generated on every select command.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2023-05-12 16:19:22 +02:00
parent 9d6003d1e5
commit e0c793dd0a
1 changed files with 1 additions and 0 deletions
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src/fido/oath.c
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@@ -82,6 +82,7 @@ app_t *oath_select(app_t *a, const uint8_t *aid, uint8_t aid_len) {
memset(res_APDU + res_APDU_size, 0, 8); res_APDU_size += 8; memset(res_APDU + res_APDU_size, 0, 8); res_APDU_size += 8;
#endif #endif
if (file_has_data(search_dynamic_file(EF_OATH_CODE)) == true) { if (file_has_data(search_dynamic_file(EF_OATH_CODE)) == true) {
random_gen(NULL, challenge, sizeof(challenge));
res_APDU[res_APDU_size++] = TAG_CHALLENGE; res_APDU[res_APDU_size++] = TAG_CHALLENGE;
res_APDU[res_APDU_size++] = sizeof(challenge); res_APDU[res_APDU_size++] = sizeof(challenge);
memcpy(res_APDU + res_APDU_size, challenge, sizeof(challenge)); memcpy(res_APDU + res_APDU_size, challenge, sizeof(challenge));