Retail MAC aka C_MAC

 tamed the C_MAC
Authenticated  Host <-> Card
Secure Session established

(only 1 card Terminated due to 10 bad tries)

This is the output:


 PC/SC terminal OMNIKEY CardMan 5x21-CL 0... wait 5  PC/SC card in OMNIKEY CardMan 5x21-CL 0, protocol T=1, state OK assigned to Card
 UID  CBE7DED8
 Card Manager  6F658...
 -> init_update 80500000085B74845D1FFCCE89
 <- card response  00009235001489950936FF020023470BDAF18E9C76C016B156A0D544
 Key_info    FF02
 Card_seq  0023
 Card_challenge  470BDAF18E9C
 Card_cryptogram  76C016B156A0D544
Sess_enc  5B49746D3E3E88290E51AC62AC2E46A3
Sess_C_MAC  473B7DCDE0E3E8EC24DFDC900D3BE93B
Sess_DEK    2BEF4B5837C13BE7B69CF5EF584D9CB5
 Card Cryptogram matched true at 32
 Host cryptogram before ENC 0023470BDAF18E9C5B74845D1FFCCE898000000000000000
 C_MAC 3126F78398CCB68D
-> external_authenticate 84820300106531817D2E170FAD3126F78398CCB68D
 Secure Session Established 


Using  javax.smartcardio    with ERACOM/Cryptoki




Eracom emerged from QUT (Queensland University of Technology), late 80's
Prof Bill Caelli and Prof Jennifer Seberry (Wollongong) ran a couple of good AusCrypts 88 & 92
I Spoke denigrating Montgomery Multiplication, which obviously kicks in somewhere past a few thousand bits.