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LDAP directory – configuration example
Filter format
A filter consists of one or more criteria. A criterion defines the LDAP attribute in which the
entered string is to be searched for, e.g. sn=%. The percent sign (%) is a placeholder for the user
input.
Operators
Following operators can be used to create filters:
Multiple criteria can be connected with logical AND (&) and/or OR operators (|). The logical oper-
ators "&" and "|" are placed in front of the criteria. The criterion must be placed in brackets and
the whole expression must be bracketed again. AND and OR operations can also be combined.
Examples
Special characters
It is also possible to find entries containing special characters. If you want to compare these char-
acters within an attribute string use backslash (\) and a 2-digit hex ASCII code as follows:
Example
(givenName=James \28Jim\29)
will find any entry with givenName attribute's value equal to "James (Jim)"
Operator
Meaning
Example
=
Equality
(attribute1=abc)
!=
Negation
(!(attribute1=abc))
>=
Greater than
(attribute1>=1000)
<=
Less than
(attribute1<=1000)
~
Proximity (LDAP server dependent)
(attribute1~=abc)
*
Wildcard
(attr1=ab*) or (attr1=*c) or (attr1=*b*)
AND operation: (&(givenName=%)(mail=%))
Searches for entries in which the first name
and
e-mail address begin with the
characters entered by the user.
OR operation:
(|(displayName=%)(sn=%))
Searches for entries in which the display name
or
surname begins with the
characters entered by the user.
Combined
operation:
(|(&(displayName=%)(mail=%))(&(sn=%)(mail=%)))
Searches for entries in which the display name
and
e-mail address
or
the sur-
name
and
e-mail address begin with the characters entered by the user.
Special character
ASCII code
Special character
ASCII code
(
\28
=
\3d
)
\29
&
\26
<
\3c
~
\7e
>
\3e
*
\2a
/
\2f
|
\7c
\
\2a
