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Increment U2F counter before authentication (#1595)

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* Fix U2F counter endianness
* Increment U2F counter before using it
* U2F: increment counter before use
* U2F: don't increment on U2fCheckOnly

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
This commit is contained in:
Walter Doekes
2022-08-17 18:23:13 +02:00
committed by GitHub
parent 831da59ed0
commit c964099c8c
1 changed files with 3 additions and 3 deletions
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6
applications/u2f/u2f.c
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@@ -277,8 +277,8 @@ static uint16_t u2f_authenticate(U2fData* U2F, uint8_t* buf) {
}
U2F->user_present = false;
// The 4 byte counter is represented in big endian
be_u2f_counter = lfs_tobe32(U2F->counter);
// The 4 byte counter is represented in big endian. Increment it before use
be_u2f_counter = lfs_tobe32(U2F->counter + 1);
// Generate hash
sha256_start(&sha_ctx);
@@ -318,8 +318,8 @@ static uint16_t u2f_authenticate(U2fData* U2F, uint8_t* buf) {
uint8_t signature_len = u2f_der_encode_signature(resp->signature, signature);
memcpy(resp->signature + signature_len, state_no_error, 2);
FURI_LOG_D(TAG, "Counter: %lu", U2F->counter);
U2F->counter++;
FURI_LOG_D(TAG, "Counter: %lu", U2F->counter);
u2f_data_cnt_write(U2F->counter);
if(U2F->callback != NULL) U2F->callback(U2fNotifyAuthSuccess, U2F->context);