Provided by: sudo-ldap_1.8.9p5-1ubuntu1_amd64 bug

NAME

     sudoers.ldap — sudo LDAP configuration

DESCRIPTION

     In addition to the standard sudoers file, sudo may be configured via LDAP.  This can be
     especially useful for synchronizing sudoers in a large, distributed environment.

     Using LDAP for sudoers has several benefits:

     ·   sudo no longer needs to read sudoers in its entirety.  When LDAP is used, there are only
         two or three LDAP queries per invocation.  This makes it especially fast and
         particularly usable in LDAP environments.

     ·   sudo no longer exits if there is a typo in sudoers.  It is not possible to load LDAP
         data into the server that does not conform to the sudoers schema, so proper syntax is
         guaranteed.  It is still possible to have typos in a user or host name, but this will
         not prevent sudo from running.

     ·   It is possible to specify per-entry options that override the global default options.
         /etc/sudoers only supports default options and limited options associated with
         user/host/commands/aliases.  The syntax is complicated and can be difficult for users to
         understand.  Placing the options directly in the entry is more natural.

     ·   The visudo program is no longer needed.  visudo provides locking and syntax checking of
         the /etc/sudoers file.  Since LDAP updates are atomic, locking is no longer necessary.
         Because syntax is checked when the data is inserted into LDAP, there is no need for a
         specialized tool to check syntax.

     Another major difference between LDAP and file-based sudoers is that in LDAP, sudo-specific
     Aliases are not supported.

     For the most part, there is really no need for sudo-specific Aliases.  Unix groups, non-Unix
     groups (via the group_plugin) or user netgroups can be used in place of User_Aliases and
     Runas_Aliases.  Host netgroups can be used in place of Host_Aliases.  Since groups and
     netgroups can also be stored in LDAP there is no real need for sudo-specific aliases.

     Cmnd_Aliases are not really required either since it is possible to have multiple users
     listed in a sudoRole.  Instead of defining a Cmnd_Alias that is referenced by multiple
     users, one can create a sudoRole that contains the commands and assign multiple users to it.

   SUDOers LDAP container
     The sudoers configuration is contained in the ou=SUDOers LDAP container.

     Sudo first looks for the cn=default entry in the SUDOers container.  If found, the multi-
     valued sudoOption attribute is parsed in the same manner as a global Defaults line in
     /etc/sudoers.  In the following example, the SSH_AUTH_SOCK variable will be preserved in the
     environment for all users.

         dn: cn=defaults,ou=SUDOers,dc=example,dc=com
         objectClass: top
         objectClass: sudoRole
         cn: defaults
         description: Default sudoOption's go here
         sudoOption: env_keep+=SSH_AUTH_SOCK

     The equivalent of a sudoer in LDAP is a sudoRole.  It consists of the following attributes:

     sudoUser
           A user name, user ID (prefixed with ‘#’), Unix group name or ID (prefixed with ‘%’ or
           ‘%#’ respectively), user netgroup (prefixed with ‘+’), or non-Unix group name or ID
           (prefixed with ‘%:’ or ‘%:#’ respectively).  Non-Unix group support is only available
           when an appropriate group_plugin is defined in the global defaults sudoRole object.

     sudoHost
           A host name, IP address, IP network, or host netgroup (prefixed with a ‘+’).  The
           special value ALL will match any host.

     sudoCommand
           A fully-qualified Unix command name with optional command line arguments, potentially
           including globbing characters (aka wild cards).  If a command name is preceded by an
           exclamation point, ‘!’, the user will be prohibited from running that command.

           The built-in command “sudoedit” is used to permit a user to run sudo with the -e
           option (or as sudoedit).  It may take command line arguments just as a normal command
           does.  Note that “sudoedit” is a command built into sudo itself and must be specified
           in without a leading path.

           The special value ALL will match any command.

           If a command name is prefixed with a SHA-2 digest, it will only be allowed if the
           digest matches.  This may be useful in situations where the user invoking sudo has
           write access to the command or its parent directory.  The following digest formats are
           supported: sha224, sha256, sha384 and sha512.  The digest name must be followed by a
           colon (‘:’) and then the actual digest, in either hex or base64 format.  For example,
           given the following value for sudoCommand:

               sha224:0GomF8mNN3wlDt1HD9XldjJ3SNgpFdbjO1+NsQ /bin/ls

           The user may only run /bin/ls if its sha224 digest matches the specified value.
           Command digests are only supported by version 1.8.7 or higher.

     sudoOption
           Identical in function to the global options described above, but specific to the
           sudoRole in which it resides.

     sudoRunAsUser
           A user name or uid (prefixed with ‘#’) that commands may be run as or a Unix group
           (prefixed with a ‘%’) or user netgroup (prefixed with a ‘+’) that contains a list of
           users that commands may be run as.  The special value ALL will match any user.

           The sudoRunAsUser attribute is only available in sudo versions 1.7.0 and higher.
           Older versions of sudo use the sudoRunAs attribute instead.

     sudoRunAsGroup
           A Unix group or gid (prefixed with ‘#’) that commands may be run as.  The special
           value ALL will match any group.

           The sudoRunAsGroup attribute is only available in sudo versions 1.7.0 and higher.

     sudoNotBefore
           A timestamp in the form yyyymmddHHMMSSZ that can be used to provide a start date/time
           for when the sudoRole will be valid.  If multiple sudoNotBefore entries are present,
           the earliest is used.  Note that timestamps must be in Coordinated Universal Time
           (UTC), not the local timezone.  The minute and seconds portions are optional, but some
           LDAP servers require that they be present (contrary to the RFC).

           The sudoNotBefore attribute is only available in sudo versions 1.7.5 and higher and
           must be explicitly enabled via the SUDOERS_TIMED option in /etc/sudo-ldap.conf.

     sudoNotAfter
           A timestamp in the form yyyymmddHHMMSSZ that indicates an expiration date/time, after
           which the sudoRole will no longer be valid.  If multiple sudoNotBefore entries are
           present, the last one is used.  Note that timestamps must be in Coordinated Universal
           Time (UTC), not the local timezone.  The minute and seconds portions are optional, but
           some LDAP servers require that they be present (contrary to the RFC).

           The sudoNotAfter attribute is only available in sudo versions 1.7.5 and higher and
           must be explicitly enabled via the SUDOERS_TIMED option in /etc/sudo-ldap.conf.

     sudoOrder
           The sudoRole entries retrieved from the LDAP directory have no inherent order.  The
           sudoOrder attribute is an integer (or floating point value for LDAP servers that
           support it) that is used to sort the matching entries.  This allows LDAP-based sudoers
           entries to more closely mimic the behavior of the sudoers file, where the of the
           entries influences the result.  If multiple entries match, the entry with the highest
           sudoOrder attribute is chosen.  This corresponds to the “last match” behavior of the
           sudoers file.  If the sudoOrder attribute is not present, a value of 0 is assumed.

           The sudoOrder attribute is only available in sudo versions 1.7.5 and higher.

     Each attribute listed above should contain a single value, but there may be multiple
     instances of each attribute type.  A sudoRole must contain at least one sudoUser, sudoHost
     and sudoCommand.

     The following example allows users in group wheel to run any command on any host via sudo:

         dn: cn=%wheel,ou=SUDOers,dc=example,dc=com
         objectClass: top
         objectClass: sudoRole
         cn: %wheel
         sudoUser: %wheel
         sudoHost: ALL
         sudoCommand: ALL

   Anatomy of LDAP sudoers lookup
     When looking up a sudoer using LDAP there are only two or three LDAP queries per invocation.
     The first query is to parse the global options.  The second is to match against the user's
     name and the groups that the user belongs to.  (The special ALL tag is matched in this query
     too.)  If no match is returned for the user's name and groups, a third query returns all
     entries containing user netgroups and checks to see if the user belongs to any of them.

     If timed entries are enabled with the SUDOERS_TIMED configuration directive, the LDAP
     queries include a sub-filter that limits retrieval to entries that satisfy the time
     constraints, if any.

   Differences between LDAP and non-LDAP sudoers
     There are some subtle differences in the way sudoers is handled once in LDAP.  Probably the
     biggest is that according to the RFC, LDAP ordering is arbitrary and you cannot expect that
     Attributes and Entries are returned in any specific order.

     The order in which different entries are applied can be controlled using the sudoOrder
     attribute, but there is no way to guarantee the order of attributes within a specific entry.
     If there are conflicting command rules in an entry, the negative takes precedence.  This is
     called paranoid behavior (not necessarily the most specific match).

     Here is an example:

         # /etc/sudoers:
         # Allow all commands except shell
         johnny  ALL=(root) ALL,!/bin/sh
         # Always allows all commands because ALL is matched last
         puddles ALL=(root) !/bin/sh,ALL

         # LDAP equivalent of johnny
         # Allows all commands except shell
         dn: cn=role1,ou=Sudoers,dc=my-domain,dc=com
         objectClass: sudoRole
         objectClass: top
         cn: role1
         sudoUser: johnny
         sudoHost: ALL
         sudoCommand: ALL
         sudoCommand: !/bin/sh

         # LDAP equivalent of puddles
         # Notice that even though ALL comes last, it still behaves like
         # role1 since the LDAP code assumes the more paranoid configuration
         dn: cn=role2,ou=Sudoers,dc=my-domain,dc=com
         objectClass: sudoRole
         objectClass: top
         cn: role2
         sudoUser: puddles
         sudoHost: ALL
         sudoCommand: !/bin/sh
         sudoCommand: ALL

     Another difference is that negations on the Host, User or Runas are currently ignored.  For
     example, the following attributes do not behave the way one might expect.

         # does not match all but joe
         # rather, does not match anyone
         sudoUser: !joe

         # does not match all but joe
         # rather, matches everyone including Joe
         sudoUser: ALL
         sudoUser: !joe

         # does not match all but web01
         # rather, matches all hosts including web01
         sudoHost: ALL
         sudoHost: !web01

   Sudoers schema
     In order to use sudo's LDAP support, the sudo schema must be installed on your LDAP server.
     In addition, be sure to index the sudoUser attribute.

     Three versions of the schema: one for OpenLDAP servers (schema.OpenLDAP), one for Netscape-
     derived servers (schema.iPlanet), and one for Microsoft Active Directory
     (schema.ActiveDirectory) may be found in the sudo distribution.

     The schema for sudo in OpenLDAP form is also included in the EXAMPLES section.

   Configuring ldap.conf
     Sudo reads the /etc/sudo-ldap.conf file for LDAP-specific configuration.  Typically, this
     file is shared between different LDAP-aware clients.  As such, most of the settings are not
     sudo-specific. Note that sudo parses /etc/sudo-ldap.conf itself and may support options that
     differ from those described in the system's ldap.conf(8) manual.  The path to ldap.conf may
     be overridden via the ldap_conf plugin argument in sudo.conf(5).

     Also note that on systems using the OpenLDAP libraries, default values specified in
     /etc/openldap/ldap.conf or the user's .ldaprc files are not used.

     Only those options explicitly listed in /etc/sudo-ldap.conf as being supported by sudo are
     honored.  Configuration options are listed below in upper case but are parsed in a case-
     independent manner.

     The pound sign (‘#’) is used to indicate a comment.  Both the comment character and any text
     after it, up to the end of the line, are ignored.  Long lines can be continued with a
     backslash (‘\’) as the last character on the line.  Note that leading white space is removed
     from the beginning of lines even when the continuation character is used.

     URI ldap[s]://[hostname[:port]] ...
           Specifies a white space-delimited list of one or more URIs describing the LDAP
           server(s) to connect to.  The protocol may be either ldap ldaps, the latter being for
           servers that support TLS (SSL) encryption.  If no port is specified, the default is
           port 389 for ldap:// or port 636 for ldaps://.  If no hostname is specified, sudo will
           connect to localhost.  Multiple URI lines are treated identically to a URI line
           containing multiple entries.  Only systems using the OpenSSL libraries support the
           mixing of ldap:// and ldaps:// URIs.  Both the Netscape-derived and Tivoli LDAP
           libraries used on most commercial versions of Unix are only capable of supporting one
           or the other.

     HOST name[:port] ...
           If no URI is specified, the HOST parameter specifies a white space-delimited list of
           LDAP servers to connect to.  Each host may include an optional port separated by a
           colon (‘:’).  The HOST parameter is deprecated in favor of the URI specification and
           is included for backwards compatibility.

     PORT port_number
           If no URI is specified, the PORT parameter specifies the default port to connect to on
           the LDAP server if a HOST parameter does not specify the port itself.  If no PORT
           parameter is used, the default is port 389 for LDAP and port 636 for LDAP over TLS
           (SSL).  The PORT parameter is deprecated in favor of the URI specification and is
           included for backwards compatibility.

     BIND_TIMELIMIT seconds
           The BIND_TIMELIMIT parameter specifies the amount of time, in seconds, to wait while
           trying to connect to an LDAP server.  If multiple URIs or HOSTs are specified, this is
           the amount of time to wait before trying the next one in the list.

     NETWORK_TIMEOUT seconds
           An alias for BIND_TIMELIMIT for OpenLDAP compatibility.

     TIMELIMIT seconds
           The TIMELIMIT parameter specifies the amount of time, in seconds, to wait for a
           response to an LDAP query.

     TIMEOUT seconds
           The TIMEOUT parameter specifies the amount of time, in seconds, to wait for a response
           from the various LDAP APIs.

     SUDOERS_BASE base
           The base DN to use when performing sudo LDAP queries.  Typically this is of the form
           ou=SUDOers,dc=example,dc=com for the domain example.com.  Multiple SUDOERS_BASE lines
           may be specified, in which case they are queried in the order specified.

     SUDOERS_SEARCH_FILTER ldap_filter
           An LDAP filter which is used to restrict the set of records returned when performing a
           sudo LDAP query.  Typically, this is of the form attribute=value or
           (&(attribute=value)(attribute2=value2)).

     SUDOERS_TIMED on/true/yes/off/false/no
           Whether or not to evaluate the sudoNotBefore and sudoNotAfter attributes that
           implement time-dependent sudoers entries.

     SUDOERS_DEBUG debug_level
           This sets the debug level for sudo LDAP queries.  Debugging information is printed to
           the standard error.  A value of 1 results in a moderate amount of debugging
           information.  A value of 2 shows the results of the matches themselves.  This
           parameter should not be set in a production environment as the extra information is
           likely to confuse users.

           The SUDOERS_DEBUG parameter is deprecated and will be removed in a future release.
           The same information is now logged via the sudo debugging framework using the “ldap”
           subsystem at priorities diag and info for debug_level values 1 and 2 respectively.
           See the sudo.conf(5) manual for details on how to configure sudo debugging.

     BINDDN DN
           The BINDDN parameter specifies the identity, in the form of a Distinguished Name (DN),
           to use when performing LDAP operations.  If not specified, LDAP operations are
           performed with an anonymous identity.  By default, most LDAP servers will allow
           anonymous access.

     BINDPW secret
           The BINDPW parameter specifies the password to use when performing LDAP operations.
           This is typically used in conjunction with the BINDDN parameter.

     ROOTBINDDN DN
           The ROOTBINDDN parameter specifies the identity, in the form of a Distinguished Name
           (DN), to use when performing privileged LDAP operations, such as sudoers queries.  The
           password corresponding to the identity should be stored in the or the path specified
           by the ldap_secret plugin argument in sudo.conf(5), which defaults to
           /etc/ldap.secret.  If no ROOTBINDDN is specified, the BINDDN identity is used (if
           any).

     LDAP_VERSION number
           The version of the LDAP protocol to use when connecting to the server.  The default
           value is protocol version 3.

     SSL on/true/yes/off/false/no
           If the SSL parameter is set to on, true or yes, TLS (SSL) encryption is always used
           when communicating with the LDAP server.  Typically, this involves connecting to the
           server on port 636 (ldaps).

     SSL start_tls
           If the SSL parameter is set to start_tls, the LDAP server connection is initiated
           normally and TLS encryption is begun before the bind credentials are sent.  This has
           the advantage of not requiring a dedicated port for encrypted communications.  This
           parameter is only supported by LDAP servers that honor the start_tls extension, such
           as the OpenLDAP and Tivoli Directory servers.

     TLS_CHECKPEER on/true/yes/off/false/no
           If enabled, TLS_CHECKPEER will cause the LDAP server's TLS certificated to be
           verified.  If the server's TLS certificate cannot be verified (usually because it is
           signed by an unknown certificate authority), sudo will be unable to connect to it.  If
           TLS_CHECKPEER is disabled, no check is made.  Note that disabling the check creates an
           opportunity for man-in-the-middle attacks since the server's identity will not be
           authenticated.  If possible, the CA's certificate should be installed locally so it
           can be verified.  This option is not supported by the Tivoli Directory Server LDAP
           libraries.

     TLS_CACERT file name
           An alias for TLS_CACERTFILE for OpenLDAP compatibility.

     TLS_CACERTFILE file name
           The path to a certificate authority bundle which contains the certificates for all the
           Certificate Authorities the client knows to be valid, e.g. /etc/ssl/ca-bundle.pem.
           This option is only supported by the OpenLDAP libraries.  Netscape-derived LDAP
           libraries use the same certificate database for CA and client certificates (see
           TLS_CERT).

     TLS_CACERTDIR directory
           Similar to TLS_CACERTFILE but instead of a file, it is a directory containing
           individual Certificate Authority certificates, e.g. /etc/ssl/certs.  The directory
           specified by TLS_CACERTDIR is checked after TLS_CACERTFILE.  This option is only
           supported by the OpenLDAP libraries.

     TLS_CERT file name
           The path to a file containing the client certificate which can be used to authenticate
           the client to the LDAP server.  The certificate type depends on the LDAP libraries
           used.

           OpenLDAP:
                 tls_cert /etc/ssl/client_cert.pem

           Netscape-derived:
                 tls_cert /var/ldap/cert7.db

           Tivoli Directory Server:
                 Unused, the key database specified by TLS_KEY contains both keys and
                 certificates.

                 When using Netscape-derived libraries, this file may also contain Certificate
                 Authority certificates.

     TLS_KEY file name
           The path to a file containing the private key which matches the certificate specified
           by TLS_CERT.  The private key must not be password-protected.  The key type depends on
           the LDAP libraries used.

           OpenLDAP:
                 tls_key /etc/ssl/client_key.pem

           Netscape-derived:
                 tls_key /var/ldap/key3.db

           Tivoli Directory Server:
                 tls_key /usr/ldap/ldapkey.kdb
           When using Tivoli LDAP libraries, this file may also contain Certificate Authority and
           client certificates and may be encrypted.

     TLS_KEYPW secret
           The TLS_KEYPW contains the password used to decrypt the key database on clients using
           the Tivoli Directory Server LDAP library.  This should be a simple string without
           quotes.  The password may not include the comment character (‘#’) and escaping of
           special characters with a backslash (‘\’) is not supported.  If this option is used,
           /etc/sudo-ldap.conf must not be world-readable to avoid exposing the password.
           Alternately, a stash file can be used to store the password in encrypted form (see
           below).

           If no TLS_KEYPW is specified, a stash file will be used if it exists.  The stash file
           must have the same path as the file specified by TLS_KEY, but use a .sth file
           extension instead of .kdb, e.g. ldapkey.sth.  The default ldapkey.kdb that ships with
           Tivoli Directory Server is encrypted with the password ssl_password.  The gsk8capicmd
           utility can be used to manage the key database and create a stash file.  This option
           is only supported by the Tivoli LDAP libraries.

     TLS_RANDFILE file name
           The TLS_RANDFILE parameter specifies the path to an entropy source for systems that
           lack a random device.  It is generally used in conjunction with prngd or egd.  This
           option is only supported by the OpenLDAP libraries.

     TLS_CIPHERS cipher list
           The TLS_CIPHERS parameter allows the administer to restrict which encryption
           algorithms may be used for TLS (SSL) connections.  See the OpenLDAP or Tivoli
           Directory Server manual for a list of valid ciphers.  This option is not supported by
           Netscape-derived libraries.

     USE_SASL on/true/yes/off/false/no
           Enable USE_SASL for LDAP servers that support SASL authentication.

     SASL_AUTH_ID identity
           The SASL user name to use when connecting to the LDAP server.  By default, sudo will
           use an anonymous connection.

     ROOTUSE_SASL on/true/yes/off/false/no
           Enable ROOTUSE_SASL to enable SASL authentication when connecting to an LDAP server
           from a privileged process, such as sudo.

     ROOTSASL_AUTH_ID identity
           The SASL user name to use when ROOTUSE_SASL is enabled.

     SASL_SECPROPS none/properties
           SASL security properties or none for no properties.  See the SASL programmer's manual
           for details.

     KRB5_CCNAME file name
           The path to the Kerberos 5 credential cache to use when authenticating with the remote
           server.

     DEREF never/searching/finding/always
           How alias dereferencing is to be performed when searching.  See the ldap.conf(8)
           manual for a full description of this option.

     See the ldap.conf entry in the EXAMPLES section.

   Configuring nsswitch.conf
     Unless it is disabled at build time, sudo consults the Name Service Switch file,
     /etc/nsswitch.conf, to specify the sudoers search order.  Sudo looks for a line beginning
     with sudoers: and uses this to determine the search order.  Note that sudo does not stop
     searching after the first match and later matches take precedence over earlier ones.  The
     following sources are recognized:

         files     read sudoers from /etc/sudoers
         ldap      read sudoers from LDAP

     In addition, the entry [NOTFOUND=return] will short-circuit the search if the user was not
     found in the preceding source.

     To consult LDAP first followed by the local sudoers file (if it exists), use:

         sudoers: ldap files

     The local sudoers file can be ignored completely by using:

         sudoers: ldap

     If the /etc/nsswitch.conf file is not present or there is no sudoers line, the following
     default is assumed:

         sudoers: files

     Note that /etc/nsswitch.conf is supported even when the underlying operating system does not
     use an nsswitch.conf file, except on AIX (see below).

   Configuring netsvc.conf
     On AIX systems, the /etc/netsvc.conf file is consulted instead of /etc/nsswitch.conf.  sudo
     simply treats netsvc.conf as a variant of nsswitch.conf; information in the previous section
     unrelated to the file format itself still applies.

     To consult LDAP first followed by the local sudoers file (if it exists), use:

         sudoers = ldap, files

     The local sudoers file can be ignored completely by using:

         sudoers = ldap

     To treat LDAP as authoritative and only use the local sudoers file if the user is not
     present in LDAP, use:

         sudoers = ldap = auth, files

     Note that in the above example, the auth qualifier only affects user lookups; both LDAP and
     sudoers will be queried for Defaults entries.

     If the /etc/netsvc.conf file is not present or there is no sudoers line, the following
     default is assumed:

         sudoers = files

FILES

     /etc/sudo-ldap.conf       LDAP configuration file

     /etc/nsswitch.conf        determines sudoers source order

     /etc/netsvc.conf          determines sudoers source order on AIX

EXAMPLES

   Example ldap.conf
       # Either specify one or more URIs or one or more host:port pairs.
       # If neither is specified sudo will default to localhost, port 389.
       #
       #host          ldapserver
       #host          ldapserver1 ldapserver2:390
       #
       # Default port if host is specified without one, defaults to 389.
       #port          389
       #
       # URI will override the host and port settings.
       uri            ldap://ldapserver
       #uri            ldaps://secureldapserver
       #uri            ldaps://secureldapserver ldap://ldapserver
       #
       # The amount of time, in seconds, to wait while trying to connect to
       # an LDAP server.
       bind_timelimit 30
       #
       # The amount of time, in seconds, to wait while performing an LDAP query.
       timelimit 30
       #
       # Must be set or sudo will ignore LDAP; may be specified multiple times.
       sudoers_base   ou=SUDOers,dc=example,dc=com
       #
       # verbose sudoers matching from ldap
       #sudoers_debug 2
       #
       # Enable support for time-based entries in sudoers.
       #sudoers_timed yes
       #
       # optional proxy credentials
       #binddn        <who to search as>
       #bindpw        <password>
       #rootbinddn    <who to search as, uses /etc/ldap.secret for bindpw>
       #
       # LDAP protocol version, defaults to 3
       #ldap_version 3
       #
       # Define if you want to use an encrypted LDAP connection.
       # Typically, you must also set the port to 636 (ldaps).
       #ssl on
       #
       # Define if you want to use port 389 and switch to
       # encryption before the bind credentials are sent.
       # Only supported by LDAP servers that support the start_tls
       # extension such as OpenLDAP.
       #ssl start_tls
       #
       # Additional TLS options follow that allow tweaking of the
       # SSL/TLS connection.
       #
       #tls_checkpeer yes # verify server SSL certificate
       #tls_checkpeer no  # ignore server SSL certificate
       #
       # If you enable tls_checkpeer, specify either tls_cacertfile
       # or tls_cacertdir.  Only supported when using OpenLDAP.
       #
       #tls_cacertfile /etc/certs/trusted_signers.pem
       #tls_cacertdir  /etc/certs
       #
       # For systems that don't have /dev/random
       # use this along with PRNGD or EGD.pl to seed the
       # random number pool to generate cryptographic session keys.
       # Only supported when using OpenLDAP.
       #
       #tls_randfile /etc/egd-pool
       #
       # You may restrict which ciphers are used.  Consult your SSL
       # documentation for which options go here.
       # Only supported when using OpenLDAP.
       #
       #tls_ciphers <cipher-list>
       #
       # Sudo can provide a client certificate when communicating to
       # the LDAP server.
       # Tips:
       #   * Enable both lines at the same time.
       #   * Do not password protect the key file.
       #   * Ensure the keyfile is only readable by root.
       #
       # For OpenLDAP:
       #tls_cert /etc/certs/client_cert.pem
       #tls_key  /etc/certs/client_key.pem
       #
       # For SunONE or iPlanet LDAP, tls_cert and tls_key may specify either
       # a directory, in which case the files in the directory must have the
       # default names (e.g. cert8.db and key4.db), or the path to the cert
       # and key files themselves.  However, a bug in version 5.0 of the LDAP
       # SDK will prevent specific file names from working.  For this reason
       # it is suggested that tls_cert and tls_key be set to a directory,
       # not a file name.
       #
       # The certificate database specified by tls_cert may contain CA certs
       # and/or the client's cert.  If the client's cert is included, tls_key
       # should be specified as well.
       # For backward compatibility, "sslpath" may be used in place of tls_cert.
       #tls_cert /var/ldap
       #tls_key /var/ldap
       #
       # If using SASL authentication for LDAP (OpenSSL)
       # use_sasl yes
       # sasl_auth_id <SASL user name>
       # rootuse_sasl yes
       # rootsasl_auth_id <SASL user name for root access>
       # sasl_secprops none
       # krb5_ccname /etc/.ldapcache

   Sudo schema for OpenLDAP
     The following schema, in OpenLDAP format, is included with sudo source and binary
     distributions as schema.OpenLDAP.  Simply copy it to the schema directory (e.g.
     /etc/openldap/schema), add the proper include line in slapd.conf and restart slapd.

       attributetype ( 1.3.6.1.4.1.15953.9.1.1
          NAME 'sudoUser'
          DESC 'User(s) who may  run sudo'
          EQUALITY caseExactIA5Match
          SUBSTR caseExactIA5SubstringsMatch
          SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )

       attributetype ( 1.3.6.1.4.1.15953.9.1.2
          NAME 'sudoHost'
          DESC 'Host(s) who may run sudo'
          EQUALITY caseExactIA5Match
          SUBSTR caseExactIA5SubstringsMatch
          SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )

       attributetype ( 1.3.6.1.4.1.15953.9.1.3
          NAME 'sudoCommand'
          DESC 'Command(s) to be executed by sudo'
          EQUALITY caseExactIA5Match
          SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )

       attributetype ( 1.3.6.1.4.1.15953.9.1.4
          NAME 'sudoRunAs'
          DESC 'User(s) impersonated by sudo'
          EQUALITY caseExactIA5Match
          SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )

       attributetype ( 1.3.6.1.4.1.15953.9.1.5
          NAME 'sudoOption'
          DESC 'Options(s) followed by sudo'
          EQUALITY caseExactIA5Match
          SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )

       attributetype ( 1.3.6.1.4.1.15953.9.1.6
          NAME 'sudoRunAsUser'
          DESC 'User(s) impersonated by sudo'
          EQUALITY caseExactIA5Match
          SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )

       attributetype ( 1.3.6.1.4.1.15953.9.1.7
          NAME 'sudoRunAsGroup'
          DESC 'Group(s) impersonated by sudo'
          EQUALITY caseExactIA5Match
          SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 )

       attributetype ( 1.3.6.1.4.1.15953.9.1.8
          NAME 'sudoNotBefore'
          DESC 'Start of time interval for which the entry is valid'
          EQUALITY generalizedTimeMatch
          ORDERING generalizedTimeOrderingMatch
          SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 )

       attributetype ( 1.3.6.1.4.1.15953.9.1.9
          NAME 'sudoNotAfter'
          DESC 'End of time interval for which the entry is valid'
          EQUALITY generalizedTimeMatch
          ORDERING generalizedTimeOrderingMatch
          SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 )

       attributeTypes ( 1.3.6.1.4.1.15953.9.1.10
           NAME 'sudoOrder'
           DESC 'an integer to order the sudoRole entries'
           EQUALITY integerMatch
           ORDERING integerOrderingMatch
           SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 )

       objectclass ( 1.3.6.1.4.1.15953.9.2.1 NAME 'sudoRole' SUP top STRUCTURAL
          DESC 'Sudoer Entries'
          MUST ( cn )
          MAY ( sudoUser $ sudoHost $ sudoCommand $ sudoRunAs $ sudoRunAsUser $
                sudoRunAsGroup $ sudoOption $ sudoNotBefore $ sudoNotAfter $
                sudoOrder $ description )
          )

SEE ALSO

     ldap.conf(5), sudo.conf(5), sudoers(8)

CAVEATS

     Note that there are differences in the way that LDAP-based sudoers is parsed compared to
     file-based sudoers.  See the Differences between LDAP and non-LDAP sudoers section for more
     information.

BUGS

     If you feel you have found a bug in sudo, please submit a bug report at
     http://www.sudo.ws/sudo/bugs/

SUPPORT

     Limited free support is available via the sudo-users mailing list, see
     http://www.sudo.ws/mailman/listinfo/sudo-users to subscribe or search the archives.

DISCLAIMER

     sudo is provided “AS IS” and any express or implied warranties, including, but not limited
     to, the implied warranties of merchantability and fitness for a particular purpose are
     disclaimed.  See the LICENSE file distributed with sudo or
     http://www.sudo.ws/sudo/license.html for complete details.