Help: Analyze the apdu SET KEY?

Hi all

I have an apdu SET KEY like this:

(1) D8 80 00 81 43 03 80 10 50 D2 EF 82 C4 0 A 24 EB BD 85 AD E1 F7 ED 71 A2 03 8B AF 47 80 10 50 D2 EF 82 C4 0 A 24 EB BD 85 AD E1 F7 ED 71 A2 03 8B AF 47 80 10 50 D2 EF 82 C4 0 A 24 EB BD 85 AD 71 A2 03 8B 47 AF ED F7 E1

or
(2) 80 D8 01 00 16 CD E5 F1 B9 49 F1 1F A7 91 32 23 C2 E6 00 0E BF 6B

And in GP 2.1.1 Specifications, coding of the apdu SET KEY like this:
CLA '80' or '84'
INS 'D8' TURN KEY
Parameter of reference 'xx' P1 P1 control
Control of 'xx' P2 P2 reference parameter
'Xx' data field length LC+ *.
_Data "xxxx..."              Key figures (and MAC if present) ____
The '00'

And field data structure like this:
_1byte key type_
_1byte length of key or keys component_
Variable: 1-n key or a data value of key component
_1byte length of key value_ control
Variable: 0-n key check value (if present)

I can't analyze over apdu (s) follow this format.

Please explain to me!

Thank you
HoaND

Published by: hoaibaotre on October 19, 2011 09:00

Published by: hoaibaotre on October 19, 2011 09:13

KCV (key check value) to a certain extent is a way to check the key when he enters the system (i.e. like the checksome). According to the EMV specifications, KCV is 3 bytes for 3DES ["00 00 00 00 00 00 00 00"] with the key in question.

You can check this with the default key 40 41 42 43 44 45 46 47 48 49 4 a 4 b 4 4 C 4 D 4F

Best regards
JDL

P.S. I can understand Vietnamese and I have lots of opportunities to work their with Viettel through a third party company (Viettel client). As you can easily see in my first name, it is the concatenation of two popular names in VN, right?

Tags: Java

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