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Module
Description
This module provides a client api to the Lightweight Directory Access Protocol (LDAP).
References:
RFC 4510 - RFC 4519
RFC 2830
The above publications can be found at IETF
.
Data types
Type definitions that are used more than once in this module:
-
handle()
-
Connection handle
-
attribute() =
-
{Type = string(), Values=[string()]}
-
modify_op()
-
scope()
-
dereference()
-
See
neverDerefAliases/0
,derefInSearching/0
,derefFindingBaseObj/0
,derefAlways/0
-
filter()
-
See
present/1
,substrings/2
,equalityMatch/2
,greaterOrEqual/2
,lessOrEqual/2
,approxMatch/2
,extensibleMatch/2
,'and'/1
,'or'/1
,'not'/1
-
return_value() =
-
ok | {ok, {referral,referrals()}} | {error,Error}
-
referrals() =
-
[Address = string()]
The contents ofAddress
is server dependent.
Types
Handle = handle()
Setup a connection to an LDAP server, the HOST
's are tried in order.
Types
Handle = handle()
Option = {port, integer()} | {log, function()} | {timeout, integer()} | {ssl, boolean()} | {sslopts, list()} | {tcpopts, list()}
Setup a connection to an LDAP server, the HOST
's are tried in order.
The log function takes three arguments, fun(Level, FormatString, [FormatArg]) end
.
Timeout set the maximum time in milliseconds that each server request may take.
All TCP socket options are accepted except active
, binary
, deliver
, list
, mode
and packet
OTP R15B01 |
Types
Handle = handle()
Shutdown the connection after sending an unbindRequest to the server. If the connection is tls the connection will be closed with ssl:close/1
, otherwise with gen_tcp:close/1
.
OTP R16B03 |
Same as start_tls(Handle, Options, infinity)
Types
Handle = handle()
Options = ssl:ssl_options()
Timeout = infinity | positive_integer()
Upgrade the connection associated with Handle
to a tls connection if possible.
The upgrade is done in two phases: first the server is asked for permission to upgrade. Second, if the request is acknowledged, the upgrade to tls is performed.
Error responses from phase one will not affect the current encryption state of the connection. Those responses are:
-
tls_already_started
- The connection is already encrypted. The connection is not affected.
-
{response,ResponseFromServer}
-
The upgrade was refused by the LDAP server. The
ResponseFromServer
is an atom delivered byt the LDAP server explained in section 2.3 of rfc 2830. The connection is not affected, so it is still un-encrypted.
Errors in the second phase will however end the connection:
-
Error
- Any error responded from ssl:connect/3
The Timeout
parameter is for the actual tls upgrade (phase 2) while the timeout in eldap:open/2
is used for the initial negotiation about upgrade (phase 1).
Types
Handle = handle()
Dn = string()
Password = string()
Authenticate the connection using simple authentication.
Types
Handle = handle()
Dn = string()
Attribute = attribute()
Add an entry. The entry must not exist.
add(Handle,
"cn=Bill Valentine, ou=people, o=Example Org, dc=example, dc=com",
[{"objectclass", ["person"]},
{"cn", ["Bill Valentine"]},
{"sn", ["Valentine"]},
{"telephoneNumber", ["545 555 00"]}]
)
OTP R15B01 |
Types
Dn = string()
Delete an entry.
delete(Handle, "cn=Bill Valentine, ou=people, o=Example Org, dc=example, dc=com")
OTP R15B01 |
Types
Type = string()
Value = string()
Create an add modification operation.
OTP R15B01 |
Types
Type = string()
Value = string()
Create a delete modification operation.
OTP R15B01 |
Types
Type = string()
Value = string()
Create a replace modification operation.
Types
Dn = string()
ModifyOp = modify_op()
Modify an entry.
modify(Handle, "cn=Bill Valentine, ou=people, o=Example Org, dc=example, dc=com",
[eldap:mod_replace("telephoneNumber", ["555 555 00"]),
eldap:mod_add("description", ["LDAP Hacker"]) ])
Types
Dn = string()
NewPasswd = string()
Modify the password of a user. See modify_password/4
.
Types
Dn = string()
NewPasswd = string()
OldPasswd = string()
GenPasswd = string()
Modify the password of a user.
Dn
. The user to modify. Should be "" if the modify request is for the user of the LDAP session.NewPasswd
. The new password to set. Should be "" if the server is to generate the password. In this case, the result will be{ok, GenPasswd}
.OldPasswd
. Sometimes required by server policy for a user to change their password. If not required, usemodify_password/3
.
Types
Dn = string()
NewRDN = string()
DeleteOldRDN = boolean()
NewSupDN = string()
Modify the DN of an entry. DeleteOldRDN
indicates whether the current RDN should be removed from the attribute list after the operation. NewSupDN
is the new parent that the RDN shall be moved to. If the old parent should remain as parent, NewSupDN
shall be "".
modify_dn(Handle, "cn=Bill Valentine, ou=people, o=Example Org, dc=example, dc=com ",
"cn=Bill Jr Valentine", true, "")
Types
SearchOptions = #eldap_search{} | [SearchOption]
SearchOption = {base, string()} | {filter, filter()} | {scope, scope()} | {attributes, [string()]} | {deref, dereference()} | | {types_only, boolean()} | {timeout, integer()}
Search the directory with the supplied the SearchOptions. The base and filter options must be supplied. Default values: scope is wholeSubtree()
, deref is derefAlways()
, types_only is false
and timeout is 0
(meaning infinity).
Filter = eldap:substrings("cn", [{any,"V"}]),
search(Handle, [{base, "dc=example, dc=com"}, {filter, Filter}, {attributes, ["cn"]}]),
The timeout
option in the SearchOptions
is for the ldap server, while the timeout in eldap:open/2
is used for each individual request in the search operation.
OTP R15B01 |
Search baseobject only.
OTP R15B01 |
Search the specified level only, i.e. do not recurse.
OTP R15B01 |
Search the entire subtree.
OTP R15B01 |
Never derefrence aliases, treat aliases as entries.
OTP R15B01 |
Always derefrence aliases.
OTP R15B01 |
Derefrence aliases only when searching.
OTP R15B01 |
Derefrence aliases only in finding the base.
OTP R15B01 |
Types
Type = string()
Create a filter which filters on attribute type presence.
OTP R15B01 |
Types
Type = string()
SubString = {StringPart, string()}
StringPart = initial | any | final
Create a filter which filters on substrings.
OTP R15B01 |
Types
Type = string()
Value = string()
Create a equality filter.
OTP R15B01 |
Types
Type = string()
Value = string()
Create a greater or equal filter.
OTP R15B01 |
Types
Type = string()
Value = string()
Create a less or equal filter.
OTP R15B01 |
Types
Type = string()
Value = string()
Create a approximation match filter.
Types
MatchValue = string()
OptionalAttrs = [Attr]
Attr = {matchingRule,string()} | {type,string()} | {dnAttributes,boolean()}
Creates an extensible match filter. For example,
eldap:extensibleMatch("Bar", [{type,"sn"}, {matchingRule,"caseExactMatch"}]))
creates a filter which performs a caseExactMatch
on the attribute sn
and matches with the value "Bar"
. The default value of dnAttributes
is false
.
OTP R15B01 |
Types
Filter = filter()
Creates a filter where all Filter
must be true.
OTP R15B01 |
Types
Filter = filter()
Create a filter where at least one of the Filter
must be true.
OTP R15B01 |
Types
Filter = filter()
Negate a filter.
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Licensed under the Apache License, Version 2.0.