|
Command: |
Verify a Data Authentication Code (DAC) or Dynamic Number (DN). |
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Notes: |
Diagnostic data is produced by this command only if the HSM is in Authorised State. |
|
Field |
Length & Type |
Details |
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COMMAND MESSAGE |
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Message header |
m A |
(Subsequently returned to the Host unchanged). |
|
Command code |
2 A |
Value KS. |
|
Mode Flag |
1 H |
Mode of operation: 0 = Perform DAC Verification 1 = Perform DN Verification |
|
Scheme ID |
1 H |
Identifier of the Scheme: 1 = Europay/MasterCard |
|
*MK-DAC(LMK) |
32 H or 1A+32H |
The Issuer Master Key for Data Authentication Codes encrypted under Variant 4 of LMK pair 28-29. Present only for Mode 0. |
|
*MK-DN(LMK) |
32 H or1A+32H |
The Issuer Master Key for Dynamic Numbers encrypted under Variant 5 of LMK pair 28-29. Present only for Mode 1. |
|
PAN/PAN Sequence No |
8 B |
Pre-formatted PAN/PAN Sequence No. Present for both Mode 0 and 1. |
|
DAC |
2 B |
Data Authentication Code for validation. Only present for Mode 0. |
|
DN |
2 B |
Dynamic Number for validation. Only present for Mode 1. |
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ATC |
2B |
Application Transaction Counter. Only present for Mode 1. |
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UN |
4B |
Unpredictable Number. Only present for Mode 1. |
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End message delimiter |
1 C |
Optional. Must be present if a message trailer is present. Value X’19. |
|
Message trailer |
n A |
Optional. Maximum length 32 characters. |
|
Field |
Length & Type |
Details |
|
RESPONSE MESSAGE |
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|
Message header |
n A |
Returned to the Host unchanged. |
|
Response code |
2 A |
Value KT. |
|
Error Code |
2 N |
00 : No error 01 : DAC or DN verification failed 04 : Mode Flag not 0 or 1 05 : Unrecognised Scheme ID 10 : MK parity error 12 : No keys in user storage 13 : LMK parity error 15 : Error in input data 21 : Invalid user storage index |
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Diagnostic Data
|
2 B |
The calculated DAC or DN (depending on the mode selected). Only provided if error code 01 is returned and the HSM is in Authorised State. |
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End message delimiter |
1 C |
Present only if present in the command message. Value X’19. |
|
Message trailer |
n A |
Present only if present in the command message. Maximum length 32 characters. |