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<header>
<copyright>
<year>2012</year><year>2013</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
The contents of this file are subject to the Erlang Public License,
Version 1.1, (the "License"); you may not use this file except in
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Software distributed under the License is distributed on an "AS IS"
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</legalnotice>
<title>eldap</title>
<prepared>Peter Högfeldt</prepared>
<docno></docno>
<date>2000-06-20</date>
<rev>B</rev>
</header>
<module>eldap</module>
<modulesummary>Eldap Functions</modulesummary>
<description>
<p>This module provides a client api to the Lightweight Directory Access Protocol (LDAP).
</p>
<p>References:</p>
<list type="bulleted">
<item> <p>RFC 4510 - RFC 4519</p> </item>
<item> <p>RFC 2830</p> </item>
</list>
<p>The above publications can be found at <url href="http://www.ietf.org">IETF</url>.
</p>
<p><em>Types</em></p>
<pre>
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, extensibleMatch/2,
'and'/1, 'or'/1, 'not'/1.
</pre>
<p></p>
</description>
<funcs>
<func>
<name>open([Host]) -> {ok, Handle} | {error, Reason}</name>
<fsummary>Open a connection to an LDAP server.</fsummary>
<type>
<v>Handle = handle()</v>
</type>
<desc>
<p>Setup a connection to an LDAP server, the <c>HOST</c>'s are tried in order. </p>
</desc>
</func>
<func>
<name>open([Host], [Option]) -> {ok, Handle} | {error, Reason}</name>
<fsummary>Open a connection to an LDAP server.</fsummary>
<type>
<v>Handle = handle()</v>
<v>Option = {port, integer()} | {log, function()} | {timeout, integer()} | {ssl, boolean()} | {sslopts, list()} | {tcpopts, list()}</v>
</type>
<desc>
<p>Setup a connection to an LDAP server, the <c>HOST</c>'s are tried in order.</p>
<p>The log function takes three arguments, <c>fun(Level, FormatString, [FormatArg]) end</c>.</p>
<p>Timeout set the maximum time in milliseconds that each server request may take.</p>
<p>All TCP socket options are accepted except
<c>active</c>, <c>binary</c>, <c>deliver</c>, <c>list</c>, <c>mode</c> and <c>packet</c>
</p>
</desc>
</func>
<func>
<name>close(Handle) -> ok</name>
<fsummary>Shutdown the connection.</fsummary>
<type>
<v>Handle = handle()</v>
</type>
<desc>
<p>Shutdown the connection.</p>
</desc>
</func>
<func>
<name>start_tls(Handle, Options) -> ok | {error,Error}</name>
<fsummary>Upgrade a connection to TLS.</fsummary>
<desc>
<p>Same as start_tls(Handle, Options, infinity)</p>
</desc>
</func>
<func>
<name>start_tls(Handle, Options, Timeout) -> ok | {error,Error}</name>
<fsummary>Upgrade a connection to TLS.</fsummary>
<type>
<v>Handle = handle()</v>
<v>Options = ssl:ssl_options()</v>
<v>Timeout = infinity | positive_integer()</v>
</type>
<desc>
<p>Upgrade the connection associated with <c>Handle</c> to a tls connection if possible.</p>
<p>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.</p>
<p>Error responses from phase one will not affect the current encryption state of the connection. Those responses are:</p>
<taglist>
<tag><c>tls_already_started</c></tag>
<item>The connection is already encrypted. The connection is not affected.</item>
<tag><c>{response,ResponseFromServer}</c></tag>
<item>The upgrade was refused by the LDAP server. The <c>ResponseFromServer</c> 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.</item>
</taglist>
<p>Errors in the second phase will however end the connection:</p>
<taglist>
<tag><c>Error</c></tag>
<item>Any error responded from ssl:connect/3</item>
</taglist>
<p>The <c>Timeout</c> parameter is for the actual tls upgrade (phase 2) while the timeout in
<seealso marker="#open/2">eldap:open/2</seealso> is used for the initial negotiation about
upgrade (phase 1).
</p>
</desc>
</func>
<func>
<name>simple_bind(Handle, Dn, Password) -> ok | {error, Reason}</name>
<fsummary>Authenticate the connection.</fsummary>
<type>
<v>Handle = handle()</v>
<v>Dn = string()</v>
<v>Password = string()</v>
</type>
<desc>
<p>Authenticate the connection using simple authentication.</p>
</desc>
</func>
<func>
<name>add(Handle, Dn, [Attribute]) -> ok | {error, Reason}</name>
<fsummary>Add an entry.</fsummary>
<type>
<v>Handle = handle()</v>
<v>Dn = string()</v>
<v>Attribute = attribute()</v>
</type>
<desc>
<p> Add an entry. The entry must not exist.</p>
<pre>
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"]}]
)
</pre>
</desc>
</func>
<func>
<name>delete(Handle, Dn) -> ok | {error, Reason}</name>
<fsummary>Delete an entry.</fsummary>
<type>
<v>Dn = string()</v>
</type>
<desc>
<p> Delete an entry.</p>
<pre>
delete(Handle, "cn=Bill Valentine, ou=people, o=Example Org, dc=example, dc=com")
</pre>
</desc>
</func>
<func>
<name>mod_add(Type, [Value]) -> modify_op()</name>
<fsummary>Create a modification operation.</fsummary>
<type>
<v>Type = string()</v>
<v>Value = string()</v>
</type>
<desc> <p> Create an add modification operation.</p> </desc>
</func>
<func>
<name>mod_delete(Type, [Value]) -> modify_op()</name>
<fsummary>Create a modification operation.</fsummary>
<type>
<v>Type = string()</v>
<v>Value = string()</v>
</type>
<desc> <p> Create a delete modification operation.</p> </desc>
</func>
<func>
<name>mod_replace(Type, [Value]) -> modify_op()</name>
<fsummary>Create a modification operation.</fsummary>
<type>
<v>Type = string()</v>
<v>Value = string()</v>
</type>
<desc> <p> Create a replace modification operation.</p> </desc>
</func>
<func>
<name>modify(Handle, Dn, [ModifyOp]) -> ok | {error, Reason}</name>
<fsummary>Modify an entry.</fsummary>
<type>
<v>Dn = string()</v>
<v>ModifyOp = modify_op()</v>
</type>
<desc>
<p> Modify an entry.</p>
<pre>
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"]) ])
</pre>
</desc>
</func>
<func>
<name>modify_dn(Handle, Dn, NewRDN, DeleteOldRDN, NewSupDN) -> ok | {error, Reason}</name>
<fsummary>Modify the DN of an entry.</fsummary>
<type>
<v>Dn = string()</v>
<v>NewRDN = string()</v>
<v>DeleteOldRDN = boolean()</v>
<v>NewSupDN = string()</v>
</type>
<desc>
<p> Modify the DN of an entry. <c>DeleteOldRDN</c> indicates
whether the current RDN should be removed from the attribute list after the after operation.
<c>NewSupDN</c> is the new parent that the RDN shall be moved to. If the old parent should
remain as parent, <c>NewSupDN</c> shall be "".</p>
<pre>
modify_dn(Handle, "cn=Bill Valentine, ou=people, o=Example Org, dc=example, dc=com ",
"cn=Bill Jr Valentine", true, "")
</pre>
</desc>
</func>
<func>
<name>search(Handle, SearchOptions) -> {ok, #eldap_search_result{}} | {error, Reason}</name>
<fsummary>Search the Directory</fsummary>
<type>
<v>SearchOptions = #eldap_search{} | [SearchOption]</v>
<v>SearchOption = {base, string()} | {filter, filter()} | {scope, scope()}
| {attributes, [string()]} | {deref, dereference()} |
| {types_only, boolean()} | {timeout, integer()}
</v>
</type>
<desc>
<p>Search the directory with the supplied the SearchOptions.
The base and filter options must be supplied.
Default values: scope is <c>wholeSubtree()</c>, deref is <c>derefAlways()</c>,
types_only is <c>false</c> and timeout is <c>0</c> (meaning infinity).
</p>
<pre>
Filter = eldap:substrings("cn", [{any,"V"}]),
search(Handle, [{base, "dc=example, dc=com"}, {filter, Filter}, {attributes, ["cn"]}]),
</pre>
<p>The <c>timeout</c> option in the <c>SearchOptions</c> is for the ldap server, while
the timeout in <seealso marker="#open/2">eldap:open/2</seealso> is used for each
individual request in the search operation.
</p>
</desc>
</func>
<func>
<name>baseObject() -> scope()</name>
<fsummary>Create search scope.</fsummary>
<desc> <p> Search baseobject only.</p> </desc>
</func>
<func>
<name>singleLevel() -> scope()</name>
<fsummary>Create search scope.</fsummary>
<desc> <p> Search the specified level only, i.e. do not recurse.</p> </desc>
</func>
<func>
<name>wholeSubtree() -> scope()</name>
<fsummary>Create search scope.</fsummary>
<desc> <p> Search the entire subtree.</p> </desc>
</func>
<func>
<name>neverDerefAliases() -> dereference()</name>
<fsummary>Create search option.</fsummary>
<desc> <p>Never derefrence aliases, treat aliases as entries.</p> </desc>
</func>
<func>
<name>derefAlways() -> dereference()</name>
<fsummary>Create search option.</fsummary>
<desc> <p>Always derefrence aliases.</p> </desc>
</func>
<func>
<name>derefInSearching() -> dereference()</name>
<fsummary>Create search option.</fsummary>
<desc> <p>Derefrence aliases only when searching.</p> </desc>
</func>
<func>
<name>derefFindingBaseObj() -> dereference()</name>
<fsummary>Create search option.</fsummary>
<desc> <p>Derefrence aliases only in finding the base.</p> </desc>
</func>
<func>
<name>present(Type) -> filter()</name>
<fsummary>Create search filter option.</fsummary>
<type>
<v>Type = string()</v>
</type>
<desc> <p>Create a filter which filters on attribute type presence.</p> </desc>
</func>
<func>
<name>substrings(Type, [SubString]) -> filter()</name>
<fsummary>Create search filter option.</fsummary>
<type>
<v>Type = string()</v>
<v>SubString = {StringPart, string()}</v>
<v>StringPart = initial | any | final</v>
</type>
<desc> <p>Create a filter which filters on substrings.</p> </desc>
</func>
<func>
<name>equalityMatch(Type, Value) -> filter()</name>
<fsummary>Create search filter option.</fsummary>
<type>
<v>Type = string()</v>
<v>Value = string()</v>
</type>
<desc> <p>Create a equality filter.</p> </desc>
</func>
<func>
<name>greaterOrEqual(Type, Value) -> filter()</name>
<fsummary>Create search filter option.</fsummary>
<type>
<v>Type = string()</v>
<v>Value = string()</v>
</type>
<desc> <p>Create a greater or equal filter.</p> </desc>
</func>
<func>
<name>lessOrEqual(Type, Value) -> filter()</name>
<fsummary>Create search filter option.</fsummary>
<type>
<v>Type = string()</v>
<v>Value = string()</v>
</type>
<desc> <p>Create a less or equal filter.</p> </desc>
</func>
<func>
<name>approxMatch(Type, Value) -> filter()</name>
<fsummary>Create search filter option.</fsummary>
<type>
<v>Type = string()</v>
<v>Value = string()</v>
</type>
<desc> <p>Create a approximation match filter.</p> </desc>
</func>
<func>
<name>extensibleMatch(MatchValue, OptionalAttrs) -> filter()</name>
<fsummary>Create search filter option.</fsummary>
<type>
<v>MatchValue = string()</v>
<v>OptionalAttrs = [Attr]</v>
<v>Attr = {matchingRule,string()} | {type,string()} | {dnAttributes,boolean()}</v>
</type>
<desc> <p>Creates an extensible match filter. For example, <c>eldap:extensibleMatch("Bar",[{type,"sn"},{matchingRule,"caseExactMatch"}]))</c> creates a filter which performs a <c>caseExactMatch</c> on the attribute <c>sn</c> and matches with the value <c>"Bar"</c>. The default value of <c>dnAttributes</c> is <c>false</c>.</p> </desc>
</func>
<func>
<name>'and'([Filter]) -> filter()</name>
<fsummary>Create search filter option.</fsummary>
<type>
<v>Filter = filter()</v>
</type>
<desc> <p>Creates a filter where all <c>Filter</c> must be true.</p> </desc>
</func>
<func>
<name>'or'([Filter]) -> filter()</name>
<fsummary>Create search filter option.</fsummary>
<type>
<v>Filter = filter()</v>
</type>
<desc> <p>Create a filter where at least one of the <c>Filter</c> must be true.</p> </desc>
</func>
<func>
<name>'not'(Filter) -> filter()</name>
<fsummary>Create search filter option.</fsummary>
<type>
<v>Filter = filter()</v>
</type>
<desc> <p>Negate a filter.</p> </desc>
</func>
</funcs>
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