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Introduction

clj-ldap is a thin layer on the unboundid sdk and allows clojure programs to talk to ldap servers. This library is available on clojars.org

 :dependencies [[clj-ldap "0.0.3"]]

This library has the same open source license as clojure (Eclipse v 1.0).

Example

(ns example
  (:require [clj-ldap.client :as ldap]))

(def ldap-server (ldap/connect {:host "ldap.example.com"}))

(ldap/get ldap-server "cn=dude,ou=people,dc=example,dc=com")

;; Returns a map such as
{:gidNumber "2000"
 :loginShell "/bin/bash"
 :objectClass #{"inetOrgPerson" "posixAccount" "shadowAccount"}
 :mail "dude@example.com"
 :sn "Dudeness"
 :cn "dude"
 :uid "dude"
 :homeDirectory "/home/dude"}

API

connect [options]

Connects to an ldap server and returns a, thread safe, LDAPConnectionPool. Options is a map with the following entries:

:host            Either a string in the form "address:port"
                 OR a map containing the keys,
                    :address   defaults to localhost
                    :port      defaults to 389 (or 636 for ldaps),
                 OR a collection containing multiple hosts used for load
                 balancing and failover. This entry is optional.
:bind-dn         The DN to bind as, optional
:password        The password to bind with, optional
:num-connections The number of connections in the pool, defaults to 1
:ssl?            Boolean, connect over SSL (ldaps), defaults to false
:trust-store     Only trust SSL certificates that are in this
                 JKS format file, optional, defaults to trusting all
                 certificates
:connect-timeout The timeout for making connections (milliseconds),
:timeout         The timeout when waiting for a response from the server
                 (milliseconds), defaults to 5 minutes

Throws a LDAPException if an error occurs establishing the connection pool or authenticating to any of the servers.

An example: (ldap/connect conn {:host "ldap.example.com" :num-connections 10})

(ldap/connect conn {:host [{:address "ldap1.example.com" :port 8000}
                           {:address "ldap3.example.com"}
                           "ldap2.example.com:8001"]
                    :ssl? true
                    :num-connections 9})

(ldap/connect conn {:host {:port 8000}})

get [connection dn] [connection dn attributes]

If successful, returns a map containing the entry for the given DN. Returns nil if the entry doesn't exist.

(ldap/get conn "cn=dude,ou=people,dc=example,dc=com")

Takes an optional collection that specifies which attributes will be returned from the server.

(ldap/get conn "cn=dude,ou=people,dc=example,dc=com" [:cn :sn])

Throws a LDAPException on error.

add [connection dn entry]

Adds an entry to the connected ldap server. The entry is map of keywords to values which can be strings, sets or vectors.

(ldap/add conn "cn=dude,ou=people,dc=example,dc=com"
               {:objectClass #{"top" "person"}
                :cn "dude"
                :sn "a"
                :description "His dudeness"
                :telephoneNumber ["1919191910" "4323324566"]})

Throws a LDAPException if there is an error with the request or the add failed.

modify [connection dn modifications]

Modifies an entry in the connected ldap server. The modifications are a map in the form: {:add {:attribute-a some-value :attribute-b [value1 value2]} :delete {:attribute-c :all :attribute-d some-value :attribute-e [value1 value2]} :replace {:attibute-d value :attribute-e [value1 value2]} :increment {:attribute-f value} :pre-read #{:attribute-a :attribute-b} :post-read #{:attribute-c :attribute-d}}

Where :add adds an attribute value, :delete deletes an attribute value and :replace replaces the set of values for the attribute with the ones specified. The entries :pre-read and :post-read specify attributes that have be read and returned either before or after the modifications have taken place.

All the keys in the map are optional e.g:

 (ldap/modify conn "cn=dude,ou=people,dc=example,dc=com"
              {:add {:telephoneNumber "232546265"}})

The values in the map can also be set to :all when doing a delete e.g:

 (ldap/modify conn "cn=dude,ou=people,dc=example,dc=com"
              {:delete {:telephoneNumber :all}})

The values of the attributes given in :pre-read and :post-read are available in the returned map and are part of an atomic ldap operation e.g

 (ldap/modify conn "uid=maxuid,ou=people,dc=example,dc=com"
              {:increment {:uidNumber 1}
               :post-read #{:uidNumber}})

 returns> 
   {:code 0
    :name "success"
    :post-read {:uidNumber "2002"}}

The above technique can be used to maintain counters for unique ids as described by rfc4525.

Throws a LDAPException on error.

search [connection base] [connection base options]

Runs a search on the connected ldap server, reads all the results into memory and returns the results as a sequence of maps. An introduction to ldap searching can be found in this article.

Options is a map with the following optional entries: :scope The search scope, can be :base :one or :sub, defaults to :sub :filter A string describing the search filter, defaults to "(objectclass=*)" :attributes A collection of the attributes to return, defaults to all user attributes e.g (ldap/search conn "ou=people,dc=example,dc=com")

(ldap/search conn "ou=people,dc=example,dc=com" {:attributes [:cn]})

Throws a LDAPSearchException on error.

search! [connection base f] [connection base options f]

Runs a search on the connected ldap server and executes the given function (for side effects) on each result. Does not read all the results into memory.

Options is a map with the following optional entries: :scope The search scope, can be :base :one or :sub, defaults to :sub :filter A string describing the search filter, defaults to "(objectclass=*)" :attributes A collection of the attributes to return, defaults to all user attributes :queue-size The size of the internal queue used to store results before they are passed to the function, the default is 100

e.g (ldap/search! conn "ou=people,dc=example,dc=com" println)

 (ldap/search! conn "ou=people,dc=example,dc=com"
                    {:filter "sn=dud*"}
                    (fn [x]
                       (println "Hello " (:cn x))))

Throws a LDAPSearchException if an error occurs during search. Throws an EntrySourceException if there is an eror obtaining search results.

delete [connection dn] [connection dn options]

Deletes the given entry in the connected ldap server. Optionally takes a map that can contain the entry :pre-read to indicate the attributes that should be read before deletion.

 (ldap/delete conn "cn=dude,ou=people,dc=example,dc=com")

 (ldap/delete conn "cn=dude,ou=people,dc=example,dc=com" 
                   {:pre-read #{"telephoneNumber"}})

Throws a LDAPException if the object does not exist or an error occurs.

bind [connection dn password]

Attempts to bind on the given connection using the given dn and password. Returns true if the bind is successful, false if not. One use of this function is to securely check a user password without reading it.

(ldap/bind conn "cn=dude,ou=people,dc=example,dc=com" "password")
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