.TH SLAPD.ACCESS 5 "RELEASEDATE" "OpenLDAP LDVERSION"
-.\" Copyright 1998-2005 The OpenLDAP Foundation All Rights Reserved.
+.\" Copyright 1998-2011 The OpenLDAP Foundation All Rights Reserved.
.\" Copying restrictions apply. See COPYRIGHT/LICENSE.
+.\" $OpenLDAP$
.SH NAME
slapd.access \- access configuration for slapd, the stand-alone LDAP daemon
.SH SYNOPSIS
.BR slapd.conf (5)
file contains configuration information for the
.BR slapd (8)
-daemon. This configuration file is also used by the
-.BR slurpd (8)
-replication daemon and by the SLAPD tools
+daemon. This configuration file is also used by the SLAPD tools
.BR slapacl (8),
.BR slapadd (8),
.BR slapauth (8),
If no access controls are present, the default policy
allows anyone and everyone to read anything but restricts
updates to rootdn. (e.g., "access to * by * read").
-The rootdn can always read and write EVERYTHING!
+.LP
+When dealing with an access list, because the global access list is
+effectively appended to each per-database list, if the resulting
+list is non-empty then the access list will end with an implicit
+.B access to * by * none
+directive. If there are no access directives applicable to a backend,
+then a default read is used.
+.LP
+.B Be warned: the rootdn can always read and write EVERYTHING!
.LP
For entries not held in any backend (such as a root DSE), the
-directives of the first backend (and any global directives) are
-used.
+global directives are used.
.LP
Arguments that should be replaced by actual text are shown in
brackets <>.
.SH THE ACCESS DIRECTIVE
The structure of the access control directives is
.TP
-.B access to <what> "[ by <who> <access> [ <control> ] ]+"
+.B access to <what> "[ by <who> [ <access> ] [ <control> ] ]+"
Grant access (specified by
.BR <access> )
to a set of entries and/or attributes (specified by
.BR <what> )
by one or more requestors (specified by
.BR <who> ).
+
+.LP
+Lists of access directives are evaluated in the order they appear
+in \fIslapd.conf\fP.
+When a
+.B <what>
+clause matches the datum whose access is being evaluated, its
+.B <who>
+clause list is checked.
+When a
+.B <who>
+clause matches the accessor's properties, its
+.B <access>
+and
+.B <control>
+clauses are evaluated.
+Access control checking stops at the first match of the
+.B <what>
+and
+.B <who>
+clause, unless otherwise dictated by the
+.B <control>
+clause.
+Each
+.B <who>
+clause list is implicitly terminated by a
+.LP
+.nf
+ by * none stop
+.fi
+.LP
+clause that results in stopping the access control with no access
+privileges granted.
+Each
+.B <what>
+clause list is implicitly terminated by a
+.LP
+.nf
+ access to *
+ by * none
+.fi
+.LP
+clause that results in granting no access privileges to an otherwise
+unspecified datum.
.SH THE <WHAT> FIELD
The field
.BR <what>
It can have the forms
.LP
.nf
- [dn[.<dnstyle>]=]<dnpattern>
+ dn[.<dnstyle>]=<dnpattern>
filter=<ldapfilter>
attrs=<attrlist>[ val[/matchingRule][.<attrstyle>]=<attrval>]
.fi
The statement
.B dn=<dnpattern>
selects the entries based on their naming context.
-The
-.B dn=
-part is optional.
The
.B <dnpattern>
is a string representation of the entry's DN.
.LP
The
.B <dnstyle>
-is also optional; however, it is recommended to specify both the
-.B dn=
-and the
-.B <dnstyle>
-to avoid ambiguities.
+is optional; however, it is recommended to specify it to avoid ambiguities.
.B Base
(synonym of
.BR baseObject ),
and/or
.BR re_format (7),
matching a normalized string representation of the entry's DN.
-The regex form of the pattern does not (yet) support UTF\-8.
+The regex form of the pattern does not (yet) support UTF-8.
.LP
The statement
.B filter=<ldapfilter>
-selects the entries based on a valid LDAP filter as described in RFC 2254.
+selects the entries based on a valid LDAP filter as described in RFC 4515.
A filter of
.B (objectClass=*)
is implied if no
The dn, filter, and attrs statements are additive; they can be used in sequence
to select entities the access rule applies to based on naming context,
value and attribute type simultaneously.
+Submatches resulting from
+.B regex
+matching can be dereferenced in the
+.B <who>
+field using the syntax
+.IR ${v<n>} ,
+where
+.I <n>
+is the submatch number.
+The default syntax,
+.IR $<n> ,
+is actually an alias for
+.IR ${d<n>} ,
+that corresponds to dereferencing submatches from the
+.B dnpattern
+portion of the
+.B <what>
+field.
.SH THE <WHO> FIELD
The field
.B <who>
tls_ssf=<n>
sasl_ssf=<n>
- aci[=<attrname>]
- dynacl/name[/<options>][.<dynstyle>][=<pattern>]
+ dynacl/<name>[/<options>][.<dynstyle>][=<pattern>]
.fi
.LP
with
<dnstyle>={{exact|base(object)}|regex
|one(level)|sub(tree)|children|level{<n>}}
<groupstyle>={exact|expand}
- <peernamestyle>={<style>|ip|path}
+ <peernamestyle>={<style>|ip|ipv6|path}
<domainstyle>={exact|regex|sub(tree)}
- <setstyle>={exact|regex}
+ <setstyle>={exact|expand}
<modifier>={expand}
+ <name>=aci <pattern>=<attrname>]
.fi
.LP
They may be specified in combination.
or the form
.BR ${<digit>+} ,
for submatches higher than 9.
+Substring substitution from attribute value can
+be done in
+using the form
+.BR ${v<digit>+} .
Since the dollar character is used to indicate a substring replacement,
the dollar character that is used to indicate match up to the end of
the string must be escaped by a second dollar character, e.g.
and
.BR sockurl=<sockurl>
mean that the contacting host IP (in the form
-.BR "IP=<ip>:<port>" )
+.BR "IP=<ip>:<port>"
+for IPv4, or
+.BR "IP=[<ipv6>]:<port>"
+for IPv6)
or the contacting host named pipe file name (in the form
.B "PATH=<path>"
if connecting through a named pipe) for
are dotted digit representations of the IP and the mask, while
.BR <n> ,
delimited by curly brackets, is an optional port.
+The same applies to IPv6 addresses when the special
+.B ipv6
+style is used.
When checking access privileges, the IP portion of the
.BR peername
is extracted, eliminating the
part, and it is compared against the
.B <ip>
portion of the pattern after masking with
-.BR <mask> .
+.BR <mask> :
+\fI((peername & <mask>) == <ip>)\fP.
As an example,
.B peername.ip=127.0.0.1
-allows connections only from localhost,
+and
+.B peername.ipv6=::1
+allow connections only from localhost,
.B peername.ip=192.168.1.0%255.255.255.0
allows connections from any IP in the 192.168.1 class C domain, and
.B peername.ip=192.168.1.16%255.255.255.240{9009}
is undocumented yet.
.LP
The statement
-.B aci[=<attrname>]
-means that the access control is determined by the values in the
-.B attrname
-of the entry itself.
-The optional
-.B <attrname>
-indicates what attributeType holds the ACI information in the entry.
-By default, the
-.B OpenLDAPaci
-operational attribute is used.
-ACIs are experimental; they must be enabled at compile time.
-.LP
-The statement
.B dynacl/<name>[/<options>][.<dynstyle>][=<pattern>]
means that access checking is delegated to the admin-defined method
indicated by
.B <pattern>
are optional, and are directly passed to the registered parsing routine.
Dynacl is experimental; it must be enabled at compile time.
-If dynacl and ACIs are both enabled, ACIs are cast into the dynacl scheme,
-where
-.B <name>=aci
-and, optionally,
-.BR <patten>=<attrname> .
-However, the original ACI syntax is preserved for backward compatibility.
+.LP
+The statement
+.B dynacl/aci[=<attrname>]
+means that the access control is determined by the values in the
+.B attrname
+of the entry itself.
+The optional
+.B <attrname>
+indicates what attributeType holds the ACI information in the entry.
+By default, the
+.B OpenLDAPaci
+operational attribute is used.
+ACIs are experimental; they must be enabled at compile time.
.LP
The statements
.BR ssf=<n> ,
set the minimum required Security Strength Factor (ssf) needed
to grant access. The value should be positive integer.
.SH THE <ACCESS> FIELD
-The field
+The optional field
.B <access> ::= [[real]self]{<level>|<priv>}
determines the access level or the specific access privileges the
.B who
Its component are defined as
.LP
.nf
- <level> ::= none|disclose|auth|compare|search|read|write
- <priv> ::= {=|+|-}{w|r|s|c|x|d|0}+
+ <level> ::= none|disclose|auth|compare|search|read|{write|add|delete}|manage
+ <priv> ::= {=|+|\-}{0|d|x|c|s|r|{w|a|z}|m}+
.fi
.LP
The modifier
An example is the
.B selfwrite
access to the member attribute of a group, which allows one to add/delete
-its own DN from the member list of a group, without affecting other members.
+its own DN from the member list of a group, while being not allowed
+to affect other members.
.LP
The
.B level
.BR compare ,
.BR search ,
.BR read ,
+.BR write ,
and
-.BR write .
+.BR manage .
Each access level implies all the preceding ones, thus
-.B write
-access will imply all accesses.
+.B manage
+grants all access including administrative access.
+The
+.BR write
+access is actually the combination of
+.BR add
+and
+.BR delete ,
+which respectively restrict the write privilege to add or delete
+the specified
+.BR <what> .
+
.LP
The
.B none
The
.B +
and
-.B -
+.B \-
signs add/remove access privileges to the existing ones.
The privileges are
+.B m
+for manage,
.B w
for write,
+.B a
+for add,
+.B z
+for delete,
.B r
for read,
.B s
More than one of the above privileges can be added in one statement.
.B 0
indicates no privileges and is used only by itself (e.g., +0).
+Note that
+.B +az
+is equivalent to
+.BR +w .
+.LP
If no access is given, it defaults to
.BR +0 .
.SH THE <CONTROL> FIELD
As a consequence, unless the operation is performed with the
.B updatedn
identity, control is passed straight to the subsequent rules.
+
.SH OPERATION REQUIREMENTS
Operations require different privileges on different portions of entries.
The following summary applies to primary database backends such as
-the LDBM, BDB, and HDB backends. Requirements for other backends may
+the BDB and HDB backends. Requirements for other backends may
(and often do) differ.
+
.LP
The
.B add
operation requires
-.B write (=w)
+.B add (=a)
privileges on the pseudo-attribute
.B entry
of the entry being added, and
-.B write (=w)
+.B add (=a)
privileges on the pseudo-attribute
.B children
of the entry's parent.
+When adding the suffix entry of a database,
+.B add
+access to
+.B children
+of the empty DN ("") is required. Also if
+Add content ACL checking has been configured on
+the database (see the
+.BR slapd.conf (5)
+or
+.BR slapd\-config (5)
+manual page),
+.B add (=a)
+will be required on all of the attributes being added.
+
.LP
The
.B bind
.B auth (=x)
privileges on the attribute the credentials are stored in (usually
.BR userPassword ).
+
.LP
The
.B compare
operation requires
.B compare (=c)
privileges on the attribute that is being compared.
+
.LP
The
.B delete
operation requires
-.B write (=w)
+.B delete (=z)
privileges on the pseudo-attribute
.B entry
of the entry being deleted, and
-.B write (=w)
+.B delete (=d)
privileges on the
.B children
pseudo-attribute of the entry's parent.
+
.LP
The
.B modify
operation requires
.B write (=w)
privileges on the attributes being modified.
+In detail,
+.B add (=a)
+is required to add new values,
+.B delete (=z)
+is required to delete existing values,
+and both
+.B delete
+and
+.BR "add (=az)" ,
+or
+.BR "write (=w)" ,
+are required to replace existing values.
+
.LP
The
.B modrdn
privileges on the pseudo-attribute
.B entry
of the entry whose relative DN is being modified,
-.B write (=w)
+.B delete (=z)
privileges on the pseudo-attribute
.B children
-of the old and new entry's parents, and
-.B write (=w)
+of the old entry's parents,
+.B add (=a)
+privileges on the pseudo-attribute
+.B children
+of the new entry's parents, and
+.B add (=a)
privileges on the attributes that are present in the new relative DN.
-.B Write (=w)
+.B Delete (=z)
privileges are also required on the attributes that are present
in the old relative DN if
.B deleteoldrdn
is set to 1.
+
.LP
The
.B search
.B search (=s)
privileges on the
.B entry
-pseudo-attribute of the searchBase (NOTE: this was introduced with 2.3).
+pseudo-attribute of the searchBase
+(NOTE: this was introduced with OpenLDAP 2.4).
Then, for each entry, it requires
.B search (=s)
privileges on the attributes that are defined in the filter.
(generally the
.B ref
attribute).
+
.LP
Some internal operations and some
.B controls
attribute of the authorizing identity and/or on the
.B authzFrom
attribute of the authorized identity.
+In general, when an internal lookup is performed for authentication
+or authorization purposes, search-specific privileges (see the access
+requirements for the search operation illustrated above) are relaxed to
+.BR auth .
.LP
Access control to search entries is checked by the frontend,
so it is fully honored by all backends; for all other operations
and for the discovery phase of the search operation,
full ACL semantics is only supported by the primary backends, i.e.
-.BR back-bdb (5),
-.BR back-hdb (5),
+.BR back\-bdb (5),
and
-.BR back-ldbm (5).
+.BR back\-hdb (5).
Some other backend, like
-.BR back-sql (5),
+.BR back\-sql (5),
may fully support them; others may only support a portion of the
described semantics, or even differ in some aspects.
The relevant details are described in the backend-specific man pages.
default slapd configuration file
.SH SEE ALSO
.BR slapd (8),
-.BR slapd-* (5),
+.BR slapd\-* (5),
.BR slapacl (8),
.BR regex (7),
.BR re_format (7)
.LP
"OpenLDAP Administrator's Guide" (http://www.OpenLDAP.org/doc/admin/)
.SH ACKNOWLEDGEMENTS
-.B OpenLDAP
-is developed and maintained by The OpenLDAP Project (http://www.openldap.org/).
-.B OpenLDAP
-is derived from University of Michigan LDAP 3.3 Release.
+.so ../Project
projects / openldap / blobdiff