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How to calculate C-MAC with single DES plus final 3DES?

974744Nov 17 2012 — edited Nov 19 2012

Hi,

I want to implemante SCP02 i=15, mys problem is how to calculate the c-mac for 2nd command because i calculate the c-mac for the external authenticate command and it works, but when i calculate the c-mac for the next command ( STORE DATA) with the same algorithm it doesn't work.

i think it's problem of ivParamterSpec for the CBC Mode.

I hope that my problem is clair and sorry for my english.

Many Thanks

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Locked on Dec 17 2012

Added on Nov 17 2012

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