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#1 2021-12-01 23:51:12
- diamondrail
- Contributor
- Registered: 2017-08-07
- Posts: 35
Translating the Raw number back into a card number/fc/len numbers
This is specifically for a Guardall G-prox II card.
How does the raw number translate into the card number?
I am trying to figure a way to customize card numbers and build a calculator in excel to do the math.
f98c67b8c6318c4725c91190 (raw) <-> 63867 (card)
Last edited by diamondrail (2022-01-20 05:30:48)
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#2 2021-12-02 00:52:46
- diamondrail
- Contributor
- Registered: 2017-08-07
- Posts: 35
Re: Translating the Raw number back into a card number/fc/len numbers
I checked on this page: http://proxmark.io/www.proxmark.org/for … 4&p=2.html
and also looked for the datasheets for G-proxii but even after reviewing the pages, I couldn't find the correlation.
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#3 2022-01-18 20:50:40
- Charlie
- Contributor
- Registered: 2017-01-27
- Posts: 129
Re: Translating the Raw number back into a card number/fc/len numbers
Hi,
See you're working on these too. Any progress so far?
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#4 2022-01-20 00:52:41
- diamondrail
- Contributor
- Registered: 2017-08-07
- Posts: 35
Re: Translating the Raw number back into a card number/fc/len numbers
Not solved yet, getting closer. Will advise.
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#5 2022-01-20 02:25:44
- Charlie
- Contributor
- Registered: 2017-01-27
- Posts: 129
Re: Translating the Raw number back into a card number/fc/len numbers
ok, let me know if i can help. Are you working on 26 or 36 bit?
feel free to message me, you can send an email by looking me up on the "user List" up top
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#6 2022-01-20 03:40:56
- diamondrail
- Contributor
- Registered: 2017-08-07
- Posts: 35
Re: Translating the Raw number back into a card number/fc/len numbers
36 bit.
Ok. I will reach out.
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#7 2022-01-20 05:24:27
- diamondrail
- Contributor
- Registered: 2017-08-07
- Posts: 35
Re: Translating the Raw number back into a card number/fc/len numbers
ok, let me know if i can help. Are you working on 26 or 36 bit?
feel free to message me, you can send an email by looking me up on the "user List" up top
Charlie - your details are hidden - so I couldn't get your email. Look me up and my contact info is temporarily public.
Last edited by diamondrail (2022-01-21 15:59:10)
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#8 2022-01-20 18:58:28
- iceman
- Administrator
- Registered: 2013-04-25
- Posts: 9,538
- Website
Re: Translating the Raw number back into a card number/fc/len numbers
[usb] pm3 --> lf gp demo --raw f98c67b8c6318c4725c91190
[+] G-Prox-II - len: 36 FC: 10 Card: 63867, Raw: F98C67B8C6318C4725C91190
[usb] pm3 -->don't spend too much time reinventing the wheel
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#9 2022-01-21 06:02:41
- Charlie
- Contributor
- Registered: 2017-01-27
- Posts: 129
Re: Translating the Raw number back into a card number/fc/len numbers
The issue i run into is...
[usb] pm3 --> lf gp demo --raw fa0e0739080a0e9181e05a1c
[+] G-Prox-II - len: 36 FC: 20 Card: 35212, Raw: FA0E0739080A0E9181E05A1Cvs
[usb] pm3 --> lf gp demo --raw f98c67b8c6318c7139ce519e
[+] G-Prox-II - len: 36 FC: 20 Card: 35212, Raw: F98C67B8C6318C7139CE519E
[usb] pm3 --> Both Raw data give the same demodulation but only one works on the reader
Last edited by Charlie (2022-01-21 06:06:00)
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#10 2022-01-22 12:22:04
- iceman
- Administrator
- Registered: 2013-04-25
- Posts: 9,538
- Website
Re: Translating the Raw number back into a card number/fc/len numbers
try to compare the demod code part, with the two of your samples above. And see where it doesn't work
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