Example: Changing From Security Level 2 To Security Level 4 (Msr Only) - Magtek eDynamo Programmer's Manual

Appendix B - Examples
B.1.5 Example: Changing from Security Level 2 to Security Level 4 (MSR Only)
; This script demonstrates changing from Security Level 2 to Security
Level 4.
; It assumes the device is at Security Level 2 with the ANS X9.24
Example
; key loaded and the KSN counter set to 1.
09 00 ; Get current KSN (should be FFFF9876543210E00001)
Request : CMND=09, LEN=00, DATA=
Response : RC=
; For KSN 1, MAC Key: 042666B4918430A3 68DE9628D03984C9
;
; The command to change Security Level looks like: 15 05 04 nnnnnnnn
; where nnnnnnnn is the MAC.
;
; The data to be MACd is: 15 05 04
; Data to be MACd must be in blocks of eight bytes, so we left justify
and
; zero fill the block to get: 15 05 04 00 00 00 00 00 (This is the
block to MAC)
; For convenience show it as the compacted form: 1505040000000000
;
; The MAC algorithm run with this data uses the following
cryptographic
; operations:
;
; Single DES Encrypt the data to be MACd with the left half of the
MAC Key:
; 1505040000000000 1DES Enc with 042666B4918430A3 =
644E76C88FFA0044
;
; Single DES Decrypt the result with the right half of the MAC Key:
; 644E76C88FFA0044 1DES Dec with 68DE9628D03984C9 =
DEAC363779906C06
;
; Single DES Encrypt the result with the left half of the MAC Key:
; DEAC363779906C06 1DES Enc with 042666B4918430A3 =
2F38A60E3F6AD6AD
;
; The leftmost four bytes of the final result are the MAC = 2F38A60E
;
; Send the MACd Set Security Level command
15 05 04 2F38A60E
Request : CMND=15, LEN=05, DATA=04 2F 38 A6 0E
Response : RC=
02 00 ; Reset so changes take effect
Request : CMND=02, LEN=00, DATA=
Response : RC=
Delay : (waited 5 seconds)
eDynamo| Secure Card Reader Authenticator | Programmer's Manual (COMMANDS)
00, LEN=0A, DATA=FF FF 98 76 54 32 10 E0 00 01
00, LEN=00, DATA=
00, LEN=00, DATA=
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