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NFC: add ability to read cards with invalid check byte #233

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Mixaill opened this issue Nov 30, 2022 · 3 comments
Open

NFC: add ability to read cards with invalid check byte #233

Mixaill opened this issue Nov 30, 2022 · 3 comments
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@Mixaill
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Mixaill commented Nov 30, 2022

Describe the enhancement you're suggesting.

See flipperdevices/flipperzero-firmware#2068

After changing NFC UID to the invalid value flipper is not able to read the tag.
It would be nice to have possible to bring tag back to life.

Anything else?

Repro:

  1. Brick card as described to NFC/Magic: magic write application does not check UID check byte flipperzero-firmware#2068
  2. Try to read tag via flipper
  3. Flipper does not detect the tag in NFC menu
  4. However, magic application can detect it, but write operations does not detect the tag
@skotopes
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skotopes commented Dec 1, 2022

@gornekich @Astrrra also make sense to bring this topic to hackathon

@Mixaill
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Mixaill commented Apr 2, 2023

Partially fixed in flipperdevices/flipperzero-firmware#2511

  • write bricked card
  • read bricked card

@bbk79
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bbk79 commented Aug 9, 2023

I have a similar issue with Mifare UL magic tags, not sure which generation but they're not detected as supported tags by Magic NFC. I managed to successfully change the UID on them using NFC CLI APDU direct writes and also managed to brick a few in the process before figuring BCC and how to write the first few blocks with a single command.

Tried modifying the NFC CLI similar to #2511 and disable BCC checks w/o much luck, bricked tags are not readable nor detected at all in Magic NFC.

CC: @Astrrra

@skotopes skotopes transferred this issue from flipperdevices/flipperzero-firmware Jul 7, 2024
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