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nfc: Fix sector reads when one block is unreadable for MIFARE Classic (#2296)

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* Fix sector reads when one block is unreadable
* Auth on the correct block instead of first
* Fix in sector reader as well
* Apply patch by @gornekich

Co-authored-by: gornekich <n.gorbadey@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>
This commit is contained in:
Krzysztof Zdulski 2023-01-27 06:00:25 +01:00 committed by GitHub
parent 5134f44c09
commit 8fc834090d
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 21 additions and 1 deletions
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22
lib/nfc/protocols/mifare_classic.c
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@ -595,6 +595,14 @@ void mf_classic_read_sector(FuriHalNfcTxRxContext* tx_rx, MfClassicData* data, u
if(mf_classic_read_block(tx_rx, &crypto, i, &block_tmp)) {
mf_classic_set_block_read(data, i, &block_tmp);
blocks_read++;
} 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_read_block(tx_rx, &crypto, i, &block_tmp)) {
mf_classic_set_block_read(data, i, &block_tmp);
blocks_read++;
}
}
} else {
blocks_read++;
@ -607,13 +615,20 @@ void mf_classic_read_sector(FuriHalNfcTxRxContext* tx_rx, MfClassicData* data, u
if(!key_b_found) break;
FURI_LOG_D(TAG, "Try to read blocks with key B");
key = nfc_util_bytes2num(sec_tr->key_b, sizeof(sec_tr->key_b));
furi_hal_nfc_sleep();
if(!mf_classic_auth(tx_rx, start_block, key, MfClassicKeyB, &crypto, false, 0)) 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)) {
mf_classic_set_block_read(data, i, &block_tmp);
blocks_read++;
} 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_read_block(tx_rx, &crypto, i, &block_tmp)) {
mf_classic_set_block_read(data, i, &block_tmp);
blocks_read++;
}
}
} else {
blocks_read++;
@ -665,6 +680,11 @@ static bool mf_classic_read_sector_with_reader(
// Read blocks
for(uint8_t i = 0; i < sector->total_blocks; i++) {
if(mf_classic_read_block(tx_rx, crypto, first_block + i, &sector->block[i])) continue;
if(i == 0) continue;
// Try to auth to read next block in case previous is locked
furi_hal_nfc_sleep();
if(!mf_classic_auth(tx_rx, first_block + i, key, key_type, crypto, false, 0)) continue;
mf_classic_read_block(tx_rx, crypto, first_block + i, &sector->block[i]);
}
// Save sector keys in last block