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Master_Key_Process CCA Release 2.54
The master-key verification pattern (MKVP) of the new master-key is compared
against the MKVP of the current and the old master-keys. If they are the
same, the service fails with return code 8, reason code 704.
If any of the eight-byte parts of the new master-key compares equal to one of
the weak DES-keys, the service fails with return code 8, reason code 703. See
page 2-62 for a list of these “weak” keys. (A parity-adjusted version of the
asymmetric master-key is used to look for weak keys.)
Except in the OS/400 environment, as part of the SET process, if a DES and/or
PKA key-storage exists, the header record of each key storage is updated with the
verification pattern of the (new) current master-key. The OS/400 environment does
not have master-key verification records in the key-storage data set.
Restrictions
None
Format
CSNBMKP
return_code Output Integer
reason_code Output Integer
exit_data_length In/Output Integer
exit_data In/Output String exit_data_length bytes
rule_array_count Input Integer one, two, or three
rule_array Input String
array
rule_array_count * 8 bytes
key_part Input String 24 bytes
Parameters
For the definitions of the return_code, reason_code, exit_data_length, and exit_data
parameters, see “Parameters Common to All Verbs” on page 1-11.
rule_array_count
The rule_array_count parameter is a pointer to an integer variable containing
the number of elements in the rule_array variable. The value must be one,
two, or three for this verb.
rule_array
The rule_array parameter is a pointer to a string variable containing an array of
keywords. The keywords are eight bytes in length, and must be left-justified
and padded on the right with space characters. The rule_array keywords are
shown below:
Keyword Meaning
Cryptographic component (optional)
ADAPTER Specifies the Coprocessor. This is the default for IBM 4758
implementations.
Master-key choice (one, optional)
SYM-MK Operate with the symmetric master-key registers.
ASYM-MK Operate with the asymmetric master-key registers.
2-60 IBM 4758 CCA Basic Services, Release 2.54, February 2005
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