External Authenticate outside Java
Hello,
I'll have to implement the ext-auth in a C++ program in industrial environment.
My problem is now, that I cannot repoduce the ciphered results.
E.G.
Init-Update (JCOP Tools) produces: (Host challenge)
=> 80500000 08 5409F03DB343DDF8 00
Result is:
<= 00006251007139910372 FF02 0003 AD669A479C52 6410304679AC3323 9000
To reproduce this result (especially card cryptogram), I would now scramble the derivation data:
9A479C52 5409F03D 0003AD66 B343DDF8
Then I would cipher it using 3DES in ECB mode and the Default key 40...4F for getting the session encryption key:
My result is then:
612DC7A5FD09B466C6831BF11C5E07A4
Then I would perform a 3DES CBC using this key with the data
5409F03DB343DDF8 0003AD669A479C52 8000000000000000
So the last eight byte of the result should be the card cryptogram 6410304679AC3323
but my result is
0C4CA4CBFB580500568F33A9B16D9B04C0B8FCF5CAA0E08B
with C0B8FCF5CAA0E08B as card cryptogram (last 8 bytes)
So what I'm doing wrong ?
Thank you for your help :-)
