Generate a Watchword Key

Command:

Generate a Watchword Key (WWK).

Field

Length & Type

Details

COMMAND MESSAGE

Message header

m A

(Subsequently returned to the Host unchanged).

Command code

2 A

Value FO.

Delimiter

1 A

Optional. If present the following three fields must be present.  Value “;”.

If an option is not required by the command fill with a valid value or 0.

Key scheme ZMK

1 A

Optional. Key scheme for encrypting key under ZMK.

Key scheme LMK

1 A

Optional. Key scheme for encrypting key under LMK.

Key check value type

1 A

Optional. Key check value calculation method

0 - KCV Backwards compatible

1 - Combined KCV 6H

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.

RESPONSE MESSAGE

Message header

n A

Returned to the Host unchanged.

Response code

2 A

Value FP.

Error code

2 N

00 : No errors

13 : LMK error; report to supervisor

WWK

16H or 1A+32H
or 1A+48H

Watchword Key encrypted under LMK pair 22-23.

Check value

16 H or 6 H

Result of encrypting 64 binary zeroes with the WWK.

16H or 6H depends upon KCV type option.

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.