mount/flipperzero-firmware
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[FL-3156] Mark keys as not found when they couldn't auth successfully (#2476)

Browse Source 
* Mark keys as not found when they couldn't auth successfully
* Improve logging and fix the reading bug

Co-authored-by: あく <alleteam@gmail.com>
This commit is contained in:
Astra 2023-03-16 10:58:07 +02:00 committed by GitHub
parent 9fbf327028
commit e90042368f
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 33 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
lib/nfc/nfc_worker.c
View File

@ -739,7 +739,7 @@ void nfc_worker_mf_classic_dict_attack(NfcWorker* nfc_worker) {
if(mf_classic_authenticate_skip_activate(
&tx_rx, block_num, key, MfClassicKeyA, !deactivated, cuid)) {
mf_classic_set_key_found(data, i, MfClassicKeyA, key);
FURI_LOG_D(TAG, "Key found");
FURI_LOG_D(TAG, "Key A found");
nfc_worker->callback(NfcWorkerEventFoundKeyA, nfc_worker->context);
uint64_t found_key;
@ -753,22 +753,31 @@ void nfc_worker_mf_classic_dict_attack(NfcWorker* nfc_worker) {
}
nfc_worker_mf_classic_key_attack(nfc_worker, found_key, &tx_rx, i + 1);
break;
}
nfc_worker_mf_classic_key_attack(nfc_worker, key, &tx_rx, i + 1);
}
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(!is_key_b_found) {
is_key_b_found = mf_classic_is_key_found(data, i, MfClassicKeyB);
if(mf_classic_authenticate_skip_activate(
&tx_rx, block_num, key, MfClassicKeyB, !deactivated, cuid)) {
FURI_LOG_D(TAG, "Key found");
FURI_LOG_D(TAG, "Key B found");
mf_classic_set_key_found(data, i, MfClassicKeyB, key);
nfc_worker->callback(NfcWorkerEventFoundKeyB, nfc_worker->context);
nfc_worker_mf_classic_key_attack(nfc_worker, key, &tx_rx, i + 1);
}
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(is_key_a_found && is_key_b_found) break;
if(nfc_worker->state != NfcWorkerStateMfClassicDictAttack) break;

26
lib/nfc/protocols/mifare_classic.c
View File

@ -651,7 +651,12 @@ void mf_classic_read_sector(FuriHalNfcTxRxContext* tx_rx, MfClassicData* data, u
if(!key_a_found) break;
FURI_LOG_D(TAG, "Try to read blocks with key A");
key = nfc_util_bytes2num(sec_tr->key_a, sizeof(sec_tr->key_a));
if(!mf_classic_auth(tx_rx, start_block, key, MfClassicKeyA, &crypto, false, 0)) break;
if(!mf_classic_auth(tx_rx, start_block, key, MfClassicKeyA, &crypto, false, 0)) {
mf_classic_set_key_not_found(data, sec_num, MfClassicKeyA);
FURI_LOG_D(TAG, "Key %dA not found in read", sec_num);
break;
}
for(size_t i = start_block; i < start_block + total_blocks; i++) {
if(!mf_classic_is_block_read(data, i)) {
if(mf_classic_read_block(tx_rx, &crypto, i, &block_tmp)) {
@ -660,7 +665,11 @@ void mf_classic_read_sector(FuriHalNfcTxRxContext* tx_rx, MfClassicData* data, u
} else if(i > start_block) {
// Try to re-auth to read block in case prevous block was protected from read
furi_hal_nfc_sleep();
if(!mf_classic_auth(tx_rx, i, key, MfClassicKeyA, &crypto, false, 0)) break;
if(!mf_classic_auth(tx_rx, i, key, MfClassicKeyA, &crypto, false, 0)) {
mf_classic_set_key_not_found(data, sec_num, MfClassicKeyA);
FURI_LOG_D(TAG, "Key %dA not found in read", sec_num);
break;
}
if(mf_classic_read_block(tx_rx, &crypto, i, &block_tmp)) {
mf_classic_set_block_read(data, i, &block_tmp);
blocks_read++;
@ -680,7 +689,12 @@ void mf_classic_read_sector(FuriHalNfcTxRxContext* tx_rx, MfClassicData* data, u
}
FURI_LOG_D(TAG, "Try to read blocks with key B");
key = nfc_util_bytes2num(sec_tr->key_b, sizeof(sec_tr->key_b));
if(!mf_classic_auth(tx_rx, start_block, key, MfClassicKeyB, &crypto, false, 0)) break;
if(!mf_classic_auth(tx_rx, start_block, key, MfClassicKeyB, &crypto, false, 0)) {
mf_classic_set_key_not_found(data, sec_num, MfClassicKeyB);
FURI_LOG_D(TAG, "Key %dB not found in read", sec_num);
break;
}
for(size_t i = start_block; i < start_block + total_blocks; i++) {
if(!mf_classic_is_block_read(data, i)) {
if(mf_classic_read_block(tx_rx, &crypto, i, &block_tmp)) {
@ -689,7 +703,11 @@ void mf_classic_read_sector(FuriHalNfcTxRxContext* tx_rx, MfClassicData* data, u
} else if(i > start_block) {
// Try to re-auth to read block in case prevous block was protected from read
furi_hal_nfc_sleep();
if(!mf_classic_auth(tx_rx, i, key, MfClassicKeyB, &crypto, false, 0)) break;
if(!mf_classic_auth(tx_rx, i, key, MfClassicKeyB, &crypto, false, 0)) {
mf_classic_set_key_not_found(data, sec_num, MfClassicKeyB);
FURI_LOG_D(TAG, "Key %dB not found in read", sec_num);
break;
}
if(mf_classic_read_block(tx_rx, &crypto, i, &block_tmp)) {
mf_classic_set_block_read(data, i, &block_tmp);
blocks_read++;