SLAPO-CONSTRAINT(5)

NAME
slapo-constraint - Attribute Constraint Overlay to slapd

SYNOPSIS
ETCDIR/slapd.conf

DESCRIPTION
The constraint overlay is used to ensure that attribute values match some constraints beyond basic LDAP syntax. Attributes can have multiple constraints placed upon them, and all must be satisfied when modifying an attribute value under constraint.

This overlay is intended to be used to force syntactic regularity upon certain string represented data which have well known canonical forms, like telephone numbers, post codes, FQDNs, etc.

It constrains only LDAP adds and modify commands and only seeks to control the add and modify value of a modify request.

CONFIGURATION
This slapd.conf option applies to the constraint overlay. It should appear after the overlay directive.

constraint_attribute <attribute_name> <type> <value>
    Specifies the constraint which should apply to the attribute named as the first parameter. Two types of constraint are currently supported - regex , size , count , and uri. The parameter following the regex type is a Unix style regular expression (See regex(7) ). The parameter following the uri type is an LDAP URI. The URI will be evaluated using an internal search. It must not include a hostname, and it must include a list of attributes to evaluate. The size type can be used to enfore a limit on an attribute length, and the count type limits the count of an attribute. Any attempt to add or modify an attribute named as part of the constraint overlay specification which does not fit the constraint listed will fail with a LDAP_CONSTRAINT_VIOLATION error.

EXAMPLES

    overlay constraint
    constraint_attribute jpegPhoto size 131072
    constraint_attribute userPassword count 3
    constraint_attribute mail regex ^[:alnum:]+@mydomain.com$
    constraint_attribute title uri
      ldap:///dc=catalog,dc=example,dc=com?title?sub?(objectClass=titleCatalog)
    A specification like the above would reject any mail attribute which did not look like <alpha-numeric string>@mydomain.com It would also reject any title attribute whose values were not listed in the title attribute of any titleCatalog entries in the given scope.

FILES

ETCDIR/slapd.conf
    default slapd configuration file

SEE ALSO
slapd.conf(5).

ACKNOWLEDGEMENTS
This module was written in 2005 by Neil Dunbar of Hewlett-Packard and subsequently extended by Howard Chu and Emmanuel Dreyfus.