From 8fc834090d289ad75de8261ad69ec310a39b5834 Mon Sep 17 00:00:00 2001 From: Krzysztof Zdulski Date: Fri, 27 Jan 2023 06:00:25 +0100 Subject: [PATCH] nfc: Fix sector reads when one block is unreadable for MIFARE Classic (#2296) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit * 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 Co-authored-by: あく --- lib/nfc/protocols/mifare_classic.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/lib/nfc/protocols/mifare_classic.c b/lib/nfc/protocols/mifare_classic.c index c91e9c60..d1aadf06 100644 --- a/lib/nfc/protocols/mifare_classic.c +++ b/lib/nfc/protocols/mifare_classic.c @@ -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, §or->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, §or->block[i]); } // Save sector keys in last block