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Additional checks before invalidating the key

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Astra 2023-03-24 21:06:36 +03:00 • committed by MX
parent 6a29984e18
commit 5391b694d1
No known key found for this signature in database
GPG key ID: 7CCC66B7DBDD1C83
1 changed files with 18 additions and 8 deletions
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26
lib/nfc/nfc_worker.c
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@ -638,7 +638,8 @@ static void nfc_worker_mf_classic_key_attack(
(uint32_t)key);
if(mf_classic_authenticate(tx_rx, block_num, key, MfClassicKeyA)) {
mf_classic_set_key_found(data, i, MfClassicKeyA, key);
FURI_LOG_D(TAG, "Key found");
FURI_LOG_D(
TAG, "Key A found: %04lx%08lx", (uint32_t)(key >> 32), (uint32_t)key);
nfc_worker->callback(NfcWorkerEventFoundKeyA, nfc_worker->context);
uint64_t found_key;
@ -661,7 +662,8 @@ static void nfc_worker_mf_classic_key_attack(
(uint32_t)key);
if(mf_classic_authenticate(tx_rx, block_num, key, MfClassicKeyB)) {
mf_classic_set_key_found(data, i, MfClassicKeyB, key);
FURI_LOG_D(TAG, "Key found");
FURI_LOG_D(
TAG, "Key B found: %04lx%08lx", (uint32_t)(key >> 32), (uint32_t)key);
nfc_worker->callback(NfcWorkerEventFoundKeyB, nfc_worker->context);
}
}
@ -760,9 +762,13 @@ void nfc_worker_mf_classic_dict_attack(NfcWorker* nfc_worker) {
furi_hal_nfc_sleep();
deactivated = true;
} else {
mf_classic_set_key_not_found(data, i, MfClassicKeyA);
is_key_a_found = false;
FURI_LOG_D(TAG, "Key %dA not found in attack", i);
// If the key A is marked as found and matches the searching key, invalidate it
if(mf_classic_is_key_found(data, i, MfClassicKeyA) &&
data->block[i].value[0] == key) {
mf_classic_set_key_not_found(data, i, MfClassicKeyA);
is_key_a_found = false;
FURI_LOG_D(TAG, "Key %dA not found in attack", i);
}
}
if(!is_key_b_found) {
is_key_b_found = mf_classic_is_key_found(data, i, MfClassicKeyB);
@ -775,9 +781,13 @@ void nfc_worker_mf_classic_dict_attack(NfcWorker* nfc_worker) {
}
deactivated = true;
} else {
mf_classic_set_key_not_found(data, i, MfClassicKeyB);
is_key_b_found = false;
FURI_LOG_D(TAG, "Key %dB not found in attack", i);
// If the key B is marked as found and matches the searching key, invalidate it
if(mf_classic_is_key_found(data, i, MfClassicKeyB) &&
data->block[i].value[10] == key) {
mf_classic_set_key_not_found(data, i, MfClassicKeyB);
is_key_b_found = false;
FURI_LOG_D(TAG, "Key %dB not found in attack", i);
}
}
if(is_key_a_found && is_key_b_found) break;
if(nfc_worker->state != NfcWorkerStateMfClassicDictAttack) break;