Is there possible for pn532 to sniff data?

beee · 2014-08-19 07:44:34

Hello,

I have a pn532 device with uart connected to the PC.I just found out yesterday that not every mifare card can be cracked by mfcuk. So I did some searches and I found a kind of card call SUPER CARD. At first I didnt believe it could work, but after I read the post here : http://www.proxmark.org/forum/viewtopic.php?id=1649 , I am really interested in it. But because this card is not cheap especially for students, I can't afford it. So I wonder if there a way to use pn532 device to sniff data between the working card and the reader?

Good day,
Beee

beee · 2014-08-19 07:53:18

and if there is no way for pn532 to sniff, what else cheap solution do I have ?

0xFFFF · 2014-08-19 12:25:56

NXp is not as easy to use as TI for sniffing (IMO).

The TRF7970A is good for sniffing. If you don't want to muck around with putting together a prototyping board, you can get the TRF7970ATB with the MSP-EXP430FR5739.
Also, check out http://hydrabus.com/.
I'm not sure if this falls within your budget?

I would not recommend using the 532. If I had to stick with NXP then I'd use the 663. Or if I had a morbid fear of small packages, I'd go for the old 632.

beee · 2014-08-19 19:02:09

Thanks, 0xFFFF. Your reply is really helpful.
About TRF7970A,I want to know if it can connect to PC via UART port like pn532?
And I do some search, found out that what I can buy in the market is a TRF7970A board like this:

If this board can use for sniffing?
From the introduction, it is say that this board provides spi port and LPT port for connectting.
Is that mean I need a board like Arduino to control the TRF7970A?

0xFFFF · 2014-08-20 00:16:31

beee wrote:

Thanks, 0xFFFF. Your reply is really helpful.

You're welcome.

beee wrote:

About TRF7970A,I want to know if it can connect to PC via UART port like pn532?

If you want to connect this directly to a PC, there's this or this.

beee wrote:

If this board can use for sniffing?

The TRF7970A can sniff. If the board you get has an MCU you will need to investigate what limitations it may impose. Ideally you'd get something that is open source. Check out http://hydrabus.com/.

beee wrote:

From the introduction, it is say that this board provides spi port and LPT port for connectting.
Is that mean I need a board like Arduino to control the TRF7970A?

You can design your own solution but keep in mind that people have already done this for you.
If you are trying to learn how to design and develop an NFC sniffer, you're going about this the wrong way. First you need to understand NFC, RF, schematic and software design fundamentals.
The questions your asking indicate to me that you have not understood the datasheet for the TRF7970A. This datasheet has two sample schematics.

beee · 2014-08-20 08:23:54

0xFFFF wrote:

If you are trying to learn how to design and develop an NFC sniffer, you're going about this the wrong way. First you need to understand NFC, RF, schematic and software design fundamentals.

OK,I have got your meaning. Actually I certainally dont know much about NFC, I just suddenly want to hack my card school these days.
So I got myself a 532 board days ago. Luckily there are default keys were used in my card, with mfoc I had dump all the data.

I just curious about how to hack into those dont use default keys, this is the reason why I post this topic to ask.
Maybe I should listen to you to think about the opensource hardware sniffer for NFC.

thanks again, and have a good day.
beee

beee · 2014-08-20 12:33:07

By the way, have you figure out where does the SUPER CARD store the captured key?
Is that can be read only by ACR122U?

bvernoux · 2014-09-23 12:22:20

beee wrote:

Thanks, 0xFFFF. Your reply is really helpful.
About TRF7970A,I want to know if it can connect to PC via UART port like pn532?
And I do some search, found out that what I can buy in the market is a TRF7970A board like this:
http://www.proxmark.org/forum/img/6269/1408470910_20140820015820.jpg
If this board can use for sniffing?
From the introduction, it is say that this board provides spi port and LPT port for connectting.
Is that mean I need a board like Arduino to control the TRF7970A?

This board alone is not enough to sniff NFC you need a very fast processor (>80MHz with modern instructions) and a very good algorithm
My board (HydraNFC+HydraBus) do that in realtime and even more soon
for more details see www.hydrabus.com

PS: The firmware is fully open source and also hardware is available on github

Best Regards
Benjamin Vernoux

vivat · 2014-09-24 08:27:31

bvernoux
Can you show some examples of your ISO14443A sniffer output please?

bvernoux · 2014-09-24 17:28:04

vivat wrote:

bvernoux
Can you show some examples of your ISO14443A sniffer output please?

Hi vivat

See at end of this post full log of the card reading all sectors(encrypted).
I have also a firmware with ultra accurate timestamp (accuracy better than 100ns) which can be included in output.
I plan to encode those data in a binary file to with format like pcapng or other any advice is welcome for next firmware update.

There is just a little challenge to decrypt the data it use nested auth...
I have a tool to decrypt the first packet, I can post the output.
Else for others the KEYA is 0xFF ...

Best Regards
Benjamin

HydraBus+HydraNFC with firmware v0.1Beta sniffed data between Samsung Nexus S(app NFC TagInfo) & Mifare One with 16sectors Tag:
U55 00 00 20 40 4f 02 00 00 00 00 
U00 
Uff 
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    50 00 57 cd 
    52 
TAG 04 00 
    93 70 cd 81 5f 76 65 d1 86 
TAG 08 b6 dd 
    50 00 57 cd 
    52
TAG 04 00 
    93 70 cd 81 5f 76 65 d1 86 
TAG 08 b6 dd 
    50 00 57 cd 
    52 
TAG 04 00 
    93 70 cd 81 5f 76 65 d1 86 
TAG 08 b6 dd 
    50 00 57 cd 
    52

Last edited by bvernoux (2014-09-24 17:48:53)

roman921 · 2016-12-02 00:12:43

0xFFFF wrote:

The TRF7970A is good for sniffing. .

I want buy this TRF7970A, but i don't find sorce for sniff mifare card.
Please, can you send me sorce code for sniff mifare card with TRF7970A ?

bvernoux · 2016-12-02 19:11:05

roman921 wrote:

0xFFFF wrote:
The TRF7970A is good for sniffing. .
I want buy this TRF7970A, but i don't find sorce for sniff mifare card.
Please, can you send me sorce code for sniff mifare card with TRF7970A ?

The source is available here https://github.com/bvernoux/hydrafw/tre … r/hydranfc

Last edited by bvernoux (2016-12-05 19:48:25)

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#1 2014-08-19 07:44:34

Is there possible for pn532 to sniff data?

#2 2014-08-19 07:53:18

Re: Is there possible for pn532 to sniff data?

#3 2014-08-19 12:25:56

Re: Is there possible for pn532 to sniff data?

#4 2014-08-19 19:02:09

Re: Is there possible for pn532 to sniff data?

#5 2014-08-20 00:16:31

Re: Is there possible for pn532 to sniff data?

#6 2014-08-20 08:23:54

Re: Is there possible for pn532 to sniff data?

#7 2014-08-20 12:33:07

Re: Is there possible for pn532 to sniff data?

#8 2014-09-23 12:22:20

Re: Is there possible for pn532 to sniff data?

#9 2014-09-24 08:27:31

Re: Is there possible for pn532 to sniff data?

#10 2014-09-24 17:28:04

Re: Is there possible for pn532 to sniff data?

#11 2016-12-02 00:12:43

Re: Is there possible for pn532 to sniff data?

#12 2016-12-02 19:11:05

Re: Is there possible for pn532 to sniff data?

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