NO-USER-MODIFICATION and USAGE dSAOperation in custom schema - openldap-technical

6 Nov 2017


      HI!
Why is it not allowed to use
NO-USER-MODIFICATION
  USAGE dSAOperation
in an attribute type declaration?
For OATH-LDAP I'd like to define a "virtual" attribute (actually to be
processed by back-sock listener) without having to write a slapd overlay.
attributetype ( oath-ldap-at:16
  NAME 'oathOTPValue'
  DESC 'OATH-LDAP: currently valid OTP value of a token'
  X-ORIGIN 'OATH-LDAP'
  SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
  EQUALITY integerMatch
  SINGLE-VALUE )
  NO-USER-MODIFICATION
  USAGE dSAOperation )
But slapd refuses to start:
5a00641b /home/michael/Proj/oath-ldap/oath-ldap.schema: line 241
(attributetype ( oath-ldap-at:16  NAME 'oathOTPValue'  DESC 'OATH-LDAP:
currently valid OTP value of a token or associated user entry (not
directly used)'  X-ORIGIN 'OATH-LDAP'  SYNTAX
1.3.6.1.4.1.1466.115.121.1.27  EQUALITY integerMatch  SINGLE-VALUE
NO-USER-MODIFICATION  USAGE dSAOperation ))
5a00641b /home/michael/Proj/oath-ldap/oath-ldap.schema: line 241
attributetype: "oath-ldap-at:16" is operational
Ciao, Michael.