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4.1.4.2.19 MapSPN

  • [アーティクル]
 procedure MapSPN(spn: unicodestring,
                  spnMappings: set of unicodestring):
     unicodestring

The MapSPN procedure performs an SPN mapping operation on spn according to the map specified in spnMappings, and returns the mapped version of spn. The mapping operation is used to change the service class of the SPN. An SPN service class is the first part of an SPN; for example, "ldap" is the service class of the SPN "ldap/fabrikam.com".

Each value of spnMappings consists of an alias, followed by an equals sign (=), followed by a comma-separated list of one or more SPN service classes. Thus, each value must be in the following format:

alias=serviceClass1,serviceClass2,serviceClass3,...,serviceClassN

If the service class portion of spn corresponds to one of the serviceClassX values in value v of spnMappings, then the return value of this procedure is the SPN value this is constructed from spn by substituting the alias value from v as the service class of spn. If no mapping is found (that is, if there is no such v), or if spn is not an SPN, then null is returned.

For example, suppose that spnMappings is the following set:

{"ldap=ldap,otherldap", "host=alerter,appmgmt,cisvc"}

If spn is "alerter/fabrikam.com", then the procedure returns "host/fabrikam.com".