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Command: |
Verify a MAC on binary data using a source TAK, then recompute the MAC using a destination TAK. |
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Notes: |
If the verify fails no destination MAC is computed. |
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Field |
Length & Type |
Details |
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COMMAND MESSAGE |
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Message header |
m A |
(Subsequently returned to the Host unchanged). |
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Command code |
2 A |
Value MO. |
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Source TAK |
16H or 1A+32H or 1A+48H |
The source TAK used to verify the MAC, encrypted under LMK 16-17. |
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Destination TAK |
16H or 1A+32H or 1A+48H |
The destination TAK used to verify the MAC, encrypted under LMK 16-17. |
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MAC |
8 H |
The MAC to be verified. |
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EITHER |
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For Binary Communications Modes: |
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Data length |
3 H |
X’001 to X’320 indicating the length of the data field. |
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Data |
n B |
Data to be MACed. 1 to 800 bytes. |
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OR |
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For Normal Async Modes: |
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Data length |
3 H |
X’002 to X’320 indicating the length of the data field. |
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Data |
n H |
Data to be MACed. 2 to 800 hexadecimal characters representing 1 to 400 bytes. |
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End message delimiter |
1 C |
Optional. Must be present if a message trailer is present. Value X’19. |
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Message trailer |
n A |
Optional. Maximum length 32 characters. |
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RESPONSE MESSAGE |
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Message header |
n A |
Returned to the Host unchanged. |
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Response code |
2 A |
Value MP. |
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Error code |
2 N |
00 : No errors 01 : MAC did not verify 10 : Source TAK parity error 11 : Destination TAK parity error 12 : No keys loaded in user storage 13 : LMK parity error 15 : Error in input data 27 : Source or destination TAK not single length 80 : Data length error |
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MAC |
8 H |
The computed MAC. |
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End message delimiter |
1 C |
Present only if present in the command message. Value X’19. |
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Message trailer |
n A |
Present only if present in the command message. Maximum length 32 characters. |