ntag21x_is_auth_supported command

Question

ntag21x_is_auth_supported command

shad0w82 opened this issue 6 years ago · 8 comments

I'm having a hard time trying to understand the function ntag21x_is_auth_supported, from which the library can discern the tag type.
The procedure is transceiving bytes 60 00, but nowhere on NTAG213/15/16 datasheet (https://www.nxp.com/docs/en/data-sheet/NTAG213_215_216.pdf) is mentioned that command.
In fact, the command always return -20 (rf timeout error).
Here you can see the libnfc log:

debug libnfc.driver.pn53x_usb TX: 00 00 ff 04 fc d4 42 60 00 8a 00
debug libnfc.driver.pn53x_usb RX: 00 00 ff 00 ff 00
debug libnfc.chip.pn53x PN53x ACKed
debug libnfc.driver.pn53x_usb RX: 00 00 ff 03 fd d5 43 01 e7 00
debug libnfc.chip.pn53x Chip error: "Timeout" (01), returned error: "RF Transmission Error" (-20))

What am I missing here?
Thanks

Answer 1 · 2019-06-07T19:46:04.000Z

Hi,
yeah, maybe I gave function a little improper name, basically it is function GET_VERSION (if you look at the docs), and only purpose is to differentiate between ntag21x and ultralight tags

Answer 2 · 2019-06-10T08:24:48.000Z

Ok i see, but then what's the difference with the function "ntag21x_get_info" (that according to the source code, it's rightly used to retrieve the information on the tag, as per the datasheet)?
More over, the "ntag21x_is_auth_supported", apart from having a little improper name, is always going to fail, because the bytes 60 00, is not matching any valid command...

Gf

Answer 3 · 2019-07-31T18:10:38.000Z

Ok i see, but then what's the difference with the function "ntag21x_get_info" (that according to the source code, it's rightly used to retrieve the information on the tag, as per the datasheet)?
More over, the "ntag21x_is_auth_supported", apart from having a little improper name, is always going to fail, because the bytes 60 00, is not matching any valid command...

Gf

Hey. I have the same issue Chip error: "Timeout" (01), returned error: "RF Transmission Error" (-20)). But I'm just trying to use nfc-list in Kali linux. I don't know if it's a hardware issue. I want to know how it goes in your case. My device is pn532 -> UART USB

Answer 4 · 2019-08-02T07:44:41.000Z

Actually I ended up rewriting my own version of libfreefare, with only the features I needed, in QT. If you are trying to use the nfc-list, the problem is a hardware one. Me too I had that same problem on one pc, but not on one another..I’m using a PN533 with native usb Interface.

Answer 5 · 2019-08-02T07:52:15.000Z

Ok, thank you for the answer. I have thought my device (pn532 chip) came broken. But it seems to be something software. Or is it a hardware issue that has to do with pc, not the pn532 itself?

Answer 6 · 2019-08-02T07:53:21.000Z

No I think the PN532 it’s ok. My problem was related to the PC I was using.

Answer 7 · 2019-10-29T20:51:11.000Z

Closing to clean up issues. Re-open if closed in error.

Answer 8 · 2020-07-09T18:38:41.000Z

I had the same issue. I think the command ist just "0x60", not "0x60 0x00" for GET_VERSION.