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#1 2015-08-27 18:58:20
- rbubba1911
- Contributor
- Registered: 2014-08-14
- Posts: 86
Cmd Error: 4 when reading with B key
Hi,
I have a strange behaviour, when I'm try to read block/sector with B key
let's say: a MIFARE CLASSIC 1k card, with key:
|---|----------------|---|----------------|---|
|sec|key A |res|key B |res|
|---|----------------|---|----------------|---|
|000| ffffffffffff | 1 | ffffffffffff | 1 |
Read block with key A work,
hf mf rdbl 3 A FFFFFFFFFFFF
--block no:3, key type:A, key:ff ff ff ff ff ff
#db# READ BLOCK FINISHED
isOk:01 data:00 00 00 00 00 00 ff 07 80 69 ff ff ff ff ff ff
With Key B I've got a error:
hf mf rdbl 3 B FFFFFFFFFFFF
--block no:3, key type:B, key:ff ff ff ff ff ff
#db# Cmd Error: 04
#db# Read block error
#db# READ BLOCK FINISHED
isOk:00
The raw trace
Start | End | Src | Data (! denotes parity error) | CRC | Annotation |
-----------|-----------|-----|-----------------------------------------------------------------|-----|--------------------|
0 | 992 | Rdr | 52 | | WUPA
2228 | 4596 | Tag | 04 00 | |
7040 | 9504 | Rdr | 93 20 | | ANTICOLL
10676 | 16564 | Tag | bc 2a ce 21 79 | |
18688 | 29216 | Rdr | 93 70 bc 2a ce 21 79 f9 6d | | SELECT_UID
30388 | 33908 | Tag | 08 b6 dd | |
35456 | 40160 | Rdr | 61 03 b6 50 | | AUTH-B(3)
42164 | 46900 | Tag | 57 f3 72 86 | |
55680 | 64992 | Rdr | aa ed! 5a 47 6d! 73! c3 b2 | !crc| ?
66228 | 70964 | Tag | 6a c6 8c! 3e | |
76288 | 81056 | Rdr | 7d b9! d7! 3d | !crc| ?
82356 | 82996 | Tag | 03! | |
I'm sure the B key is correct, when I try with a wrong key, I've got the "Authentication failed" message
note: the write command with B key do the same " Cmd Error: 04 "
Do you have a clue ?
My version:
Prox/RFID mark3 RFID instrument
bootrom: master/v2.2.0-44-g987dfb6-suspect 2015-07-24 09:54:15
os: master/v2.2.0-44-g987dfb6-suspect 2015-07-24 09:54:16
LF FPGA image built for 2s30vq100 on 2015/03/06 at 07:38:04
HF FPGA image built for 2s30vq100 on 2015/06/22 at 21:47:54
Last edited by rbubba1911 (2015-08-27 19:14:25)
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#2 2015-08-27 19:52:52
- iceman
- Administrator
- Registered: 2013-04-25
- Posts: 9,506
- Website
Re: Cmd Error: 4 when reading with B key
maybe your accessbits doesnt allow reading with key B...
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#3 2015-08-28 12:22:27
- rbubba1911
- Contributor
- Registered: 2014-08-14
- Posts: 86
Re: Cmd Error: 4 when reading with B key
that why I read block 3, as you can see, my access condition is okay : ff 07 80
I try with other card, with B key I always have trouble.
btw, what is your firmware version (I use the last git version) , there is a "stable" version of the firmware/client ?
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