eldap

Eldap Functions

This module provides a client api to the Lightweight Directory Access Protocol (LDAP).

References:

RFC 4510 - RFC 4519

The above publications can be found at IETF.

Types

handle()    Connection handle
attribute() {Type = string(), Values=[string()]}
modify_op() See mod_add/2, mod_delete/2, mod_replace/2
scope()     See baseObject/0, singleLevel/0, wholeSubtree/0
dereference() See neverDerefAliases/0, derefInSearching/0, derefFindingBaseObj/0, derefAlways/0
filter()    See present/1, substrings/2,
                equalityMatch/2, greaterOrEqual/2, lessOrEqual/2,
                approxMatch/2,
                'and'/1, 'or'/1, 'not'/1.

Functions

open([Host]) -> {ok, Handle} | {error, Reason}

  • Handle = handle()

Setup a connection to an LDAP server, the HOST's are tried in order.

open([Host], [Option]) -> {ok, Handle} | {error, Reason}

  • Handle = handle()
  • Option = {port, integer()} | {log, function()} | {timeout, integer()} | {ssl, boolean()} | {sslopts, 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.

close(Handle) -> ok

  • Handle = handle()

Shutdown the connection.

simple_bind(Handle, Dn, Password) -> ok | {error, Reason}

  • Handle = handle()
  • Dn = string()
  • Password = string()

Authenticate the connection using simple authentication.

add(Handle, Dn, [Attribute]) -> ok | {error, Reason}

  • 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"]}]
     )

delete(Handle, Dn) -> ok | {error, Reason}

  • Dn = string()

Delete an entry.

  delete(Handle, "cn=Bill Valentine, ou=people, o=Example Org, dc=example, dc=com")

mod_add(Type, [Value]) -> modify_op()

  • Type = string()
  • Value = string()

Create an add modification operation.

mod_delete(Type, [Value]) -> modify_op()

  • Type = string()
  • Value = string()

Create a delete modification operation.

mod_replace(Type, [Value]) -> modify_op()

  • Type = string()
  • Value = string()

Create a replace modification operation.

modify(Handle, Dn, [ModifyOp]) -> ok | {error, Reason}

  • 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"]) ])

modify_dn(Handle, Dn, NewRDN, DeleteOldRDN, NewSupDN) -> ok | {error, Reason}

  • Dn = string()
  • NewRDN = string()
  • DeleteOldRDN = boolean()
  • NewSupDN = string()

Modify the DN of an entry. DeleteOldRDN indicates whether the current RDN should be removed after operation. NewSupDN should be "" if the RDN should not be moved or the new parent which the RDN will be moved to.

  modify_dn(Handle, "cn=Bill Valentine, ou=people, o=Example Org, dc=example, dc=com ",
            "cn=Bill Jr Valentine", true, "")

search(Handle, SearchOptions) -> {ok, #eldap_search_result{}} | {error, Reason}

  • 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"]}]),

baseObject() -> scope()

Search baseobject only.

singleLevel() -> scope()

Search the specified level only, i.e. do not recurse.

wholeSubtree() -> scope()

Search the entire subtree.

neverDerefAliases() -> dereference()

Never derefrence aliases, treat aliases as entries.

derefAlways() -> dereference()

Always derefrence aliases.

derefInSearching() -> dereference()

Derefrence aliases only when searching.

derefFindingBaseObj() -> dereference()

Derefrence aliases only in finding the base.

present(Type) -> filter()

  • Type = string()

Create a filter which filters on attribute type presence.

substrings(Type, [SubString]) -> filter()

  • Type = string()
  • SubString = {StringPart, string()}
  • StringPart = initial | any | final

Create a filter which filters on substrings.

equalityMatch(Type, Value) -> filter()

  • Type = string()
  • Value = string()

Create a equality filter.

greaterOrEqual(Type, Value) -> filter()

  • Type = string()
  • Value = string()

Create a greater or equal filter.

lessOrEqual(Type, Value) -> filter()

  • Type = string()
  • Value = string()

Create a less or equal filter.

approxMatch(Type, Value) -> filter()

  • Type = string()
  • Value = string()

Create a approximation match filter.

'and'([Filter]) -> filter()

  • Filter = filter()

Creates a filter where all Filter must be true.

'or'([Filter]) -> filter()

  • Filter = filter()

Create a filter where at least one of the Filter must be true.

'not'(Filter) -> filter()

  • Filter = filter()

Negate a filter.

View Functions