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flipperdevices / flipperzero-firmware

Flipper Zero firmware source code
https://flipperzero.one
GNU General Public License v3.0
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NFC 14a emulation bug #1768

Closed gloglas closed 1 year ago

gloglas commented 2 years ago

Describe the bug.

NFC works as should but after scanning 14a card and emulating UID, emulating no longer works. If you exit back to NFC menu or home screen and try to emulate one of your saved cards, it doesn't work. If you try to read a card, it will read as it should. The NFC emulation just stops working until flipper restarts.

Reproduction

Try NFC funcionality, emulate something. Everything works.

Scan this type of card:

Tag type: ISO 14443-4
NXP - Mifare DESFire EV1 8k

Technologies Available:
IsoDep, NfcA, NdefFormatable

Serial number 04:5B:2A:C1:19:5B:04 # random serial num
ATQA 0x0344
SAK 0x20
ATS 0x80

Go to More > Emulate UID press OK Emulation starts, yet nothing cannot be read with a reader (meaning another device). Exit NFC app Go back in NFC app and try to emulate anything. It will not emulate, until you reboot os.

Target

0.66.1 (0.67.2-rc doesnt work either)

Logs

No response

Anything else?

I think it might be related to flipperdevices/flipperzero-firmware#1726

gornekich commented 2 years ago

Reproduced this bug, working on it. Thank you!

gloglas commented 1 year ago

Any updates?

apollo13 commented 1 year ago

I think I am running into the same bug with a 4k MIFARE DESFire EV1, that said for me it seems that I can no longer emulate anything after simply reading the tag. That is reading this tag and then emulating the test.nfc from #1721 also doesn't work without a reboot.

apollo13 commented 1 year ago

Reading the card yielded:

477611 [I][NfcWorker] Mifare DESFire detected
477617 [T][StorageAPI] File/Dir 000118F0 alloc
477625 [T][StorageAPI] File 000118F0 - 0001197C open (/ext/nfc/debug.txt)
477632 [T][FuriHalNfc] State change 0 -> 10
477765 [T][FuriHalNfc] State change 10 -> 11
477798 [T][FuriHalNfc] State change 11 -> 13
477807 [T][FuriHalNfc] State change 13 -> 30
477830 [W][MifareDESFire] Bad DESFire GET_KEY_SETTINGS response
477836 [W][MifareDESFire] Bad DESFire GET_APPLICATION_IDS response
477860 [T][StorageAPI] File 000118F0 - 0001197C closed
477862 [T][StorageAPI] File/Dir 000118F0 free
477864 [I][NfcWorker] Unknown card. Save UID

Can I do anything else to help debugging?

skotopes commented 1 year ago

I think this was fixed couple releases ago. Please confirm.

apollo13 commented 1 year ago

Hi, I am on 0.71.1 and still have problems. I will try 0.72 and report back.

apollo13 commented 1 year ago

@skotopes I just tested against 0.72 and I cannot emulate test.nfc after reading a "MIFARE DESFire EV1 (MF3ICDH41)" chip. After a reboot I can emulate test.nfc just fine again. and I cannot emulate the newly read chip either.

skotopes commented 1 year ago

@Astrrra @gornekich can you include it in this sprint?

gloglas commented 1 year ago

I think this was fixed couple releases ago. Please confirm.

Problem still persists with the card mentioned in the first comment. Nothing has changed.

apollo13 commented 1 year ago

The chip that I read out looks like this:

Filetype: Flipper NFC device
Version: 2
# Nfc device type can be UID, Mifare Ultralight, Mifare Classic, Bank card
Device type: UID
# UID, ATQA and SAK are common for all formats
UID: XX XX XX XX XX XX (replaced by me)
ATQA: 44 03
SAK: 20
Astrrra commented 1 year ago

Fixed in #2098, please create a new issue if the problem persists.