Proxmark3 community

whitefire

Contributor

Registered: 2018-06-10

Posts: 7

Change the PUPI random value

Hi guys,

I want to know if there is a possibility to change the PUPI code generated when you launch "hf 14b sim". I don't know if I have to change this in the code or there is a parameter in the command. I'm new to proxmark RDV III so bear with me. If you know the code that generate that PUPI code, would please send the part in the code ?

Thanks in advance

piwi

Contributor

Registered: 2013-06-04

Posts: 704

Re: Change the PUPI random value

The relevant code is in iso14443b.c:

	// ... and we always respond with ATQB, PUPI = 820de174, Application Data = 0x20381922,
	// supports only 106kBit/s in both directions, max frame size = 32Bytes,
	// supports ISO14443-4, FWI=8 (77ms), NAD supported, CID not supported:
	static const uint8_t response1[] = {
		0x50, 0x82, 0x0d, 0xe1, 0x74, 0x20, 0x38, 0x19, 0x22,
		0x00, 0x21, 0x85, 0x5e, 0xd7
	};