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#1 2020-08-31 14:06:41

jramb0
Contributor
Registered: 2016-11-07
Posts: 25

iclass wrbl - writing failed

Hi All,

I am able to read the fobs using hf iclass rdbl b XX k XXXXXXXXXXX

However, I am having issues to write back the data to the blank fob when using the command:

hf iclass wrbl b 06 d XXXXXXXXXXXXX k XXXXXXXXXXXXXX

I get the error:
[-] Writing failed


I am not too sure if I am missing something.

When dumping the fob data, I can see all the blocks data (I have compared them to what I get through iclassified and confirmed they are OK)

I am just unable to write it back to the blank fob and it is getting to my head!



[ Proxmark3 RFID instrument ]

[ CLIENT ]
  client: RRG/Iceman/master/v4.9237-856-gd6e3366c 2020-08-26 21:28:50
  compiled with MinGW-w64 10.2.0 OS:Windows (64b) ARCH:x86_64

[ PROXMARK3 ]

[ ARM ]
  bootrom: RRG/Iceman/master/v4.9237-856-gd6e3366c 2020-08-26 21:28:35
       os: RRG/Iceman/master/v4.9237-856-gd6e3366c 2020-08-26 21:28:42
  compiled with GCC 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599]

[ FPGA ]
  LF image built for 2s30vq100 on 2020-07-08 at 23: 8: 7
  HF image built for 2s30vq100 on 2020-07-08 at 23: 8:19
  HF FeliCa image built for 2s30vq100 on 2020-07-08 at 23: 8:30

[ Hardware ]
  --= uC: AT91SAM7S256 Rev B
  --= Embedded Processor: ARM7TDMI
  --= Nonvolatile Program Memory Size: 256K bytes, Used: 255808 bytes (98%) Free: 6336 bytes ( 2%)
  --= Second Nonvolatile Program Memory Size: None
  --= Internal SRAM Size: 64K bytes
  --= Architecture Identifier: AT91SAM7Sxx Series
  --= Nonvolatile Program Memory Type: Embedded Flash Memory



It would be great if someone would put me on the right track of what I am doing wrong or help a bit!


Thanks!

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#2 2020-08-31 14:08:14

iceman
Administrator
Registered: 2013-04-25
Posts: 6,690
Website

Re: iclass wrbl - writing failed

are you sure you have the right key?


If you feel the love,  https://www.patreon.com/iceman1001

modhex(hkhehghthbhudcfcdchkigiehgduiehg)

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#3 2020-09-03 12:47:05

jramb0
Contributor
Registered: 2016-11-07
Posts: 25

Re: iclass wrbl - writing failed

wouldn't be the same key as the one to read the fob?

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#4 2020-09-03 12:51:18

iceman
Administrator
Registered: 2013-04-25
Posts: 6,690
Website

Re: iclass wrbl - writing failed

depends on configuration of the card...
I have no issue writing to a iCLASS card with legacy key or an elite key,  so I can't replicate your problem.


If you feel the love,  https://www.patreon.com/iceman1001

modhex(hkhehghthbhudcfcdchkigiehgduiehg)

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#5 2020-09-11 00:28:48

hayabusa
Contributor
From: Australia
Registered: 2019-08-27
Posts: 9

Re: iclass wrbl - writing failed

Hi iceman,

I believe it is the same issue as previous one
refer to "iClass Write block [XX] failed"
Cheers

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