1SLAPO-CONSTRAINT(5) File Formats Manual SLAPO-CONSTRAINT(5)
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6 slapo-constraint - Attribute Constraint Overlay to slapd
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9 /etc/openldap/slapd.conf
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12 The constraint overlay is used to ensure that attribute values match
13 some constraints beyond basic LDAP syntax. Attributes can have multi‐
14 ple constraints placed upon them, and all must be satisfied when modi‐
15 fying an attribute value under constraint.
16 This overlay is intended to be used to force syntactic regularity upon
18 certain string represented data which have well known canonical forms,
19 like telephone numbers, post codes, FQDNs, etc.
20 It constrains only LDAP add, modify and rename commands and only seeks
22 to control the add and replace values of modify and rename requests.
23 No constraints are applied for operations performed with the relax con‐
25 trol set.
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28 This slapd.conf option applies to the constraint overlay. It should
29 appear after the overlay directive.
30 constraint_attribute <attribute_name>[,...] <type> <value> [<extra>
32 [...]]
33 Specifies the constraint which should apply to the comma-sepa‐
34 rated attribute list named as the first parameter. Five types
35 of constraint are currently supported - regex, size, count, uri,
36 and set.
37 The parameter following the regex type is a Unix style regular
39 expression (See regex(7) ). The parameter following the uri type
40 is an LDAP URI. The URI will be evaluated using an internal
41 search. It must not include a hostname, and it must include a
42 list of attributes to evaluate.
43 The parameter following the set type is a string that is inter‐
45 preted according to the syntax in use for ACL sets. This allows
46 one to construct constraints based on the contents of the entry.
47 The size type can be used to enforce a limit on an attribute
49 length, and the count type limits the number of values of an
50 attribute.
51 Extra parameters can occur in any order after those described
53 above.
54 <extra> : restrict=<uri>
56 This extra parameter allows one to restrict the application of
58 the corresponding constraint only to entries that match the
59 base, scope and filter portions of the LDAP URI. The base, if
60 present, must be within the naming context of the database. The
61 scope is only used when the base is present; it defaults to
62 base. The other parameters of the URI are not allowed.
63 Any attempt to add or modify an attribute named as part of the con‐
66 straint overlay specification which does not fit the constraint listed
67 will fail with a LDAP_CONSTRAINT_VIOLATION error.
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70 overlay constraint
71 constraint_attribute jpegPhoto size 131072
72 constraint_attribute userPassword count 3
73 constraint_attribute mail regex ^[[:alnum:]]+@mydomain.com$
74 constraint_attribute title uri
75 ldap:///dc=catalog,dc=example,dc=com?title?sub?(objectClass=titleCatalog)
76 constraint_attribute cn,sn,givenName set
77 "(this/givenName + [ ] + this/sn) & this/cn"
78 restrict="ldap:///ou=People,dc=example,dc=com??sub?(objectClass=inetOrgPerson)"
79 A specification like the above would reject any mail attribute which
81 did not look like <alpha-numeric string>@mydomain.com. It would also
82 reject any title attribute whose values were not listed in the title
83 attribute of any titleCatalog entries in the given scope. (Note that
84 the "dc=catalog,dc=example,dc=com" subtree ought to reside in a sepa‐
85 rate database, otherwise the initial set of titleCatalog entries could
86 not be populated while the constraint is in effect.) Finally, it
87 requires the values of the attribute cn to be constructed by pairing
88 values of the attributes sn and givenName, separated by a space, but
89 only for entries derived from the objectClass inetOrgPerson.
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92 /etc/openldap/slapd.conf
93 default slapd configuration file
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96 slapd.conf(5), slapd-config(5),
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99 This module was written in 2005 by Neil Dunbar of Hewlett-Packard and
100 subsequently extended by Howard Chu and Emmanuel Dreyfus. OpenLDAP
101 Software is developed and maintained by The OpenLDAP Project
102 <http://www.openldap.org/>. OpenLDAP Software is derived from the Uni‐
103 versity of Michigan LDAP 3.3 Release.
104OpenLDAP 2.4.50 2020/04/28 SLAPO-CONSTRAINT(5)