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authorTorbjorn Tornkvist <[email protected]>2012-03-12 10:44:46 +0100
committerDan Gudmundsson <[email protected]>2012-03-20 15:12:02 +0100
commitd8dbf15de4fa1a08b9a05e7d8e08fdb025fe1dc3 (patch)
tree914a8bcef9cfe76a01ad2055ad73149dabdd1c10 /lib/eldap/src/eldap.erl
parent725032aabda06c77934b461374b8657963f4ff1c (diff)
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[eldap] Initial copy of Tobbe's eldap client
Copied with Torbjorns permission from https://github.com/etnt/eldap.git
Diffstat (limited to 'lib/eldap/src/eldap.erl')
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diff --git a/lib/eldap/src/eldap.erl b/lib/eldap/src/eldap.erl
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+-module(eldap).
+%%% --------------------------------------------------------------------
+%%% Created: 12 Oct 2000 by Tobbe <[email protected]>
+%%% Function: Erlang client LDAP implementation according RFC 2251,2253
+%%% and 2255. The interface is based on RFC 1823, and
+%%% draft-ietf-asid-ldap-c-api-00.txt
+%%%
+%%% Copyright (c) 2010 Torbjorn Tornkvist
+%%% See MIT-LICENSE at the top dir for licensing information.
+%%% --------------------------------------------------------------------
+-vc('$Id$ ').
+-export([open/1,open/2,simple_bind/3,controlling_process/2,
+ baseObject/0,singleLevel/0,wholeSubtree/0,close/1,
+ equalityMatch/2,greaterOrEqual/2,lessOrEqual/2,
+ approxMatch/2,search/2,substrings/2,present/1,
+ 'and'/1,'or'/1,'not'/1,modify/3, mod_add/2, mod_delete/2,
+ mod_replace/2, add/3, delete/2, modify_dn/5,parse_dn/1,
+ parse_ldap_url/1]).
+
+-import(lists,[concat/1]).
+
+-include("ELDAPv3.hrl").
+-include("eldap.hrl").
+
+-define(LDAP_VERSION, 3).
+-define(LDAP_PORT, 389).
+-define(LDAPS_PORT, 636).
+
+-record(eldap, {version = ?LDAP_VERSION,
+ host, % Host running LDAP server
+ port = ?LDAP_PORT, % The LDAP server port
+ fd, % Socket filedescriptor.
+ binddn = "", % Name of the entry to bind as
+ passwd, % Password for (above) entry
+ id = 0, % LDAP Request ID
+ log, % User provided log function
+ timeout = infinity, % Request timeout
+ anon_auth = false, % Allow anonymous authentication
+ use_tls = false % LDAP/LDAPS
+ }).
+
+%%% For debug purposes
+%%-define(PRINT(S, A), io:fwrite("~w(~w): " ++ S, [?MODULE,?LINE|A])).
+-define(PRINT(S, A), true).
+
+-define(elog(S, A), error_logger:info_msg("~w(~w): "++S,[?MODULE,?LINE|A])).
+
+%%% ====================================================================
+%%% Exported interface
+%%% ====================================================================
+
+%%% --------------------------------------------------------------------
+%%% open(Hosts [,Opts] )
+%%% --------------------
+%%% Setup a connection to on of the Hosts in the argument
+%%% list. Stop at the first successful connection attempt.
+%%% Valid Opts are: Where:
+%%%
+%%% {port, Port} - Port is the port number
+%%% {log, F} - F(LogLevel, FormatString, ListOfArgs)
+%%% {timeout, milliSec} - request timeout
+%%%
+%%% --------------------------------------------------------------------
+open(Hosts) ->
+ open(Hosts, []).
+
+open(Hosts, Opts) when is_list(Hosts), is_list(Opts) ->
+ Self = self(),
+ Pid = spawn_link(fun() -> init(Hosts, Opts, Self) end),
+ recv(Pid).
+
+%%% --------------------------------------------------------------------
+%%% Shutdown connection (and process) asynchronous.
+%%% --------------------------------------------------------------------
+
+close(Handle) when is_pid(Handle) ->
+ send(Handle, close).
+
+%%% --------------------------------------------------------------------
+%%% Set who we should link ourselves to
+%%% --------------------------------------------------------------------
+
+controlling_process(Handle, Pid) when is_pid(Handle), is_pid(Pid) ->
+ link(Pid),
+ send(Handle, {cnt_proc, Pid}),
+ recv(Handle).
+
+%%% --------------------------------------------------------------------
+%%% Authenticate ourselves to the Directory
+%%% using simple authentication.
+%%%
+%%% Dn - The name of the entry to bind as
+%%% Passwd - The password to be used
+%%%
+%%% Returns: ok | {error, Error}
+%%% --------------------------------------------------------------------
+simple_bind(Handle, Dn, Passwd) when is_pid(Handle) ->
+ send(Handle, {simple_bind, Dn, Passwd}),
+ recv(Handle).
+
+%%% --------------------------------------------------------------------
+%%% Add an entry. The entry field MUST NOT exist for the AddRequest
+%%% to succeed. The parent of the entry MUST exist.
+%%% Example:
+%%%
+%%% add(Handle,
+%%% "cn=Bill Valentine, ou=people, o=Bluetail AB, dc=bluetail, dc=com",
+%%% [{"objectclass", ["person"]},
+%%% {"cn", ["Bill Valentine"]},
+%%% {"sn", ["Valentine"]},
+%%% {"telephoneNumber", ["545 555 00"]}]
+%%% )
+%%% --------------------------------------------------------------------
+add(Handle, Entry, Attributes) when is_pid(Handle),is_list(Entry),is_list(Attributes) ->
+ send(Handle, {add, Entry, add_attrs(Attributes)}),
+ recv(Handle).
+
+%%% Do sanity check !
+add_attrs(Attrs) ->
+ F = fun({Type,Vals}) when is_list(Type),is_list(Vals) ->
+ %% Confused ? Me too... :-/
+ {'AddRequest_attributes',Type, Vals}
+ end,
+ case catch lists:map(F, Attrs) of
+ {'EXIT', _} -> throw({error, attribute_values});
+ Else -> Else
+ end.
+
+%%% --------------------------------------------------------------------
+%%% Delete an entry. The entry consists of the DN of
+%%% the entry to be deleted.
+%%% Example:
+%%%
+%%% delete(Handle,
+%%% "cn=Bill Valentine, ou=people, o=Bluetail AB, dc=bluetail, dc=com"
+%%% )
+%%% --------------------------------------------------------------------
+delete(Handle, Entry) when is_pid(Handle), is_list(Entry) ->
+ send(Handle, {delete, Entry}),
+ recv(Handle).
+
+%%% --------------------------------------------------------------------
+%%% Modify an entry. Given an entry a number of modification
+%%% operations can be performed as one atomic operation.
+%%% Example:
+%%%
+%%% modify(Handle,
+%%% "cn=Torbjorn Tornkvist, ou=people, o=Bluetail AB, dc=bluetail, dc=com",
+%%% [replace("telephoneNumber", ["555 555 00"]),
+%%% add("description", ["LDAP hacker"])]
+%%% )
+%%% --------------------------------------------------------------------
+modify(Handle, Object, Mods) when is_pid(Handle), is_list(Object), is_list(Mods) ->
+ send(Handle, {modify, Object, Mods}),
+ recv(Handle).
+
+%%%
+%%% Modification operations.
+%%% Example:
+%%% replace("telephoneNumber", ["555 555 00"])
+%%%
+mod_add(Type, Values) when is_list(Type), is_list(Values) -> m(add, Type, Values).
+mod_delete(Type, Values) when is_list(Type), is_list(Values) -> m(delete, Type, Values).
+mod_replace(Type, Values) when is_list(Type), is_list(Values) -> m(replace, Type, Values).
+
+m(Operation, Type, Values) ->
+ #'ModifyRequest_changes_SEQOF'{
+ operation = Operation,
+ modification = #'PartialAttribute'{
+ type = Type,
+ vals = Values}}.
+
+%%% --------------------------------------------------------------------
+%%% Modify an entry. Given an entry a number of modification
+%%% operations can be performed as one atomic operation.
+%%% Example:
+%%%
+%%% modify_dn(Handle,
+%%% "cn=Bill Valentine, ou=people, o=Bluetail AB, dc=bluetail, dc=com",
+%%% "cn=Ben Emerson",
+%%% true,
+%%% ""
+%%% )
+%%% --------------------------------------------------------------------
+modify_dn(Handle, Entry, NewRDN, DelOldRDN, NewSup)
+ when is_pid(Handle),is_list(Entry),is_list(NewRDN),is_atom(DelOldRDN),is_list(NewSup) ->
+ send(Handle, {modify_dn, Entry, NewRDN,
+ bool_p(DelOldRDN), optional(NewSup)}),
+ recv(Handle).
+
+%%% Sanity checks !
+
+bool_p(Bool) when Bool==true;Bool==false -> Bool.
+
+optional([]) -> asn1_NOVALUE;
+optional(Value) -> Value.
+
+%%% --------------------------------------------------------------------
+%%% Synchronous search of the Directory returning a
+%%% requested set of attributes.
+%%%
+%%% Example:
+%%%
+%%% Filter = eldap:substrings("sn", [{any,"o"}]),
+%%% eldap:search(S, [{base, "dc=bluetail, dc=com"},
+%%% {filter, Filter},
+%%% {attributes,["cn"]}])),
+%%%
+%%% Returned result: {ok, #eldap_search_result{}}
+%%%
+%%% Example:
+%%%
+%%% {ok,{eldap_search_result,
+%%% [{eldap_entry,
+%%% "cn=Magnus Froberg, dc=bluetail, dc=com",
+%%% [{"cn",["Magnus Froberg"]}]},
+%%% {eldap_entry,
+%%% "cn=Torbjorn Tornkvist, dc=bluetail, dc=com",
+%%% [{"cn",["Torbjorn Tornkvist"]}]}],
+%%% []}}
+%%%
+%%% --------------------------------------------------------------------
+search(Handle, A) when is_pid(Handle), is_record(A, eldap_search) ->
+ call_search(Handle, A);
+search(Handle, L) when is_pid(Handle), is_list(L) ->
+ case catch parse_search_args(L) of
+ {error, Emsg} -> {error, Emsg};
+ A when is_record(A, eldap_search) -> call_search(Handle, A)
+ end.
+
+call_search(Handle, A) ->
+ send(Handle, {search, A}),
+ recv(Handle).
+
+parse_search_args(Args) ->
+ parse_search_args(Args, #eldap_search{scope = wholeSubtree}).
+
+parse_search_args([{base, Base}|T],A) ->
+ parse_search_args(T,A#eldap_search{base = Base});
+parse_search_args([{filter, Filter}|T],A) ->
+ parse_search_args(T,A#eldap_search{filter = Filter});
+parse_search_args([{scope, Scope}|T],A) ->
+ parse_search_args(T,A#eldap_search{scope = Scope});
+parse_search_args([{attributes, Attrs}|T],A) ->
+ parse_search_args(T,A#eldap_search{attributes = Attrs});
+parse_search_args([{types_only, TypesOnly}|T],A) ->
+ parse_search_args(T,A#eldap_search{types_only = TypesOnly});
+parse_search_args([{timeout, Timeout}|T],A) when is_integer(Timeout) ->
+ parse_search_args(T,A#eldap_search{timeout = Timeout});
+parse_search_args([H|_],_) ->
+ throw({error,{unknown_arg, H}});
+parse_search_args([],A) ->
+ A.
+
+%%%
+%%% The Scope parameter
+%%%
+baseObject() -> baseObject.
+singleLevel() -> singleLevel.
+wholeSubtree() -> wholeSubtree.
+
+%%%
+%%% Boolean filter operations
+%%%
+'and'(ListOfFilters) when is_list(ListOfFilters) -> {'and',ListOfFilters}.
+'or'(ListOfFilters) when is_list(ListOfFilters) -> {'or', ListOfFilters}.
+'not'(Filter) when is_tuple(Filter) -> {'not',Filter}.
+
+%%%
+%%% The following Filter parameters consist of an attribute
+%%% and an attribute value. Example: F("uid","tobbe")
+%%%
+equalityMatch(Desc, Value) -> {equalityMatch, av_assert(Desc, Value)}.
+greaterOrEqual(Desc, Value) -> {greaterOrEqual, av_assert(Desc, Value)}.
+lessOrEqual(Desc, Value) -> {lessOrEqual, av_assert(Desc, Value)}.
+approxMatch(Desc, Value) -> {approxMatch, av_assert(Desc, Value)}.
+
+av_assert(Desc, Value) ->
+ #'AttributeValueAssertion'{attributeDesc = Desc,
+ assertionValue = Value}.
+
+%%%
+%%% Filter to check for the presence of an attribute
+%%%
+present(Attribute) when is_list(Attribute) ->
+ {present, Attribute}.
+
+
+%%%
+%%% A substring filter seem to be based on a pattern:
+%%%
+%%% InitValue*AnyValue*FinalValue
+%%%
+%%% where all three parts seem to be optional (at least when
+%%% talking with an OpenLDAP server). Thus, the arguments
+%%% to substrings/2 looks like this:
+%%%
+%%% Type ::= string( <attribute> )
+%%% SubStr ::= listof( {initial,Value} | {any,Value}, {final,Value})
+%%%
+%%% Example: substrings("sn",[{initial,"To"},{any,"kv"},{final,"st"}])
+%%% will match entries containing: 'sn: Tornkvist'
+%%%
+substrings(Type, SubStr) when is_list(Type), is_list(SubStr) ->
+ Ss = {'SubstringFilter_substrings',v_substr(SubStr)},
+ {substrings,#'SubstringFilter'{type = Type,
+ substrings = Ss}}.
+
+%%% --------------------------------------------------------------------
+%%% Worker process. We keep track of a controlling process to
+%%% be able to terminate together with it.
+%%% --------------------------------------------------------------------
+
+init(Hosts, Opts, Cpid) ->
+ Data = parse_args(Opts, Cpid, #eldap{}),
+ case try_connect(Hosts, Data) of
+ {ok,Data2} ->
+ send(Cpid, {ok,self()}),
+ put(req_timeout, Data#eldap.timeout), % kludge...
+ loop(Cpid, Data2);
+ Else ->
+ send(Cpid, Else),
+ unlink(Cpid),
+ exit(Else)
+ end.
+
+parse_args([{port, Port}|T], Cpid, Data) when is_integer(Port) ->
+ parse_args(T, Cpid, Data#eldap{port = Port});
+parse_args([{timeout, Timeout}|T], Cpid, Data) when is_integer(Timeout),Timeout>0 ->
+ parse_args(T, Cpid, Data#eldap{timeout = Timeout});
+parse_args([{anon_auth, true}|T], Cpid, Data) ->
+ parse_args(T, Cpid, Data#eldap{anon_auth = false});
+parse_args([{anon_auth, _}|T], Cpid, Data) ->
+ parse_args(T, Cpid, Data);
+parse_args([{ssl, true}|T], Cpid, Data) ->
+ parse_args(T, Cpid, Data#eldap{use_tls = true});
+parse_args([{ssl, _}|T], Cpid, Data) ->
+ parse_args(T, Cpid, Data);
+parse_args([{log, F}|T], Cpid, Data) when is_function(F) ->
+ parse_args(T, Cpid, Data#eldap{log = F});
+parse_args([{log, _}|T], Cpid, Data) ->
+ parse_args(T, Cpid, Data);
+parse_args([H|_], Cpid, _) ->
+ send(Cpid, {error,{wrong_option,H}}),
+ exit(wrong_option);
+parse_args([], _, Data) ->
+ Data.
+
+%%% Try to connect to the hosts in the listed order,
+%%% and stop with the first one to which a successful
+%%% connection is made.
+
+try_connect([Host|Hosts], Data) ->
+ TcpOpts = [{packet, asn1}, {active,false}],
+ case do_connect(Host, Data, TcpOpts) of
+ {ok,Fd} -> {ok,Data#eldap{host = Host, fd = Fd}};
+ _ -> try_connect(Hosts, Data)
+ end;
+try_connect([],_) ->
+ {error,"connect failed"}.
+
+do_connect(Host, Data, Opts) when Data#eldap.use_tls == false ->
+ gen_tcp:connect(Host, Data#eldap.port, Opts, Data#eldap.timeout);
+do_connect(Host, Data, Opts) when Data#eldap.use_tls == true ->
+ ssl:connect(Host, Data#eldap.port, [{verify,0}|Opts]).
+
+
+loop(Cpid, Data) ->
+ receive
+
+ {From, {search, A}} ->
+ {Res,NewData} = do_search(Data, A),
+ send(From,Res),
+ loop(Cpid, NewData);
+
+ {From, {modify, Obj, Mod}} ->
+ {Res,NewData} = do_modify(Data, Obj, Mod),
+ send(From,Res),
+ loop(Cpid, NewData);
+
+ {From, {modify_dn, Obj, NewRDN, DelOldRDN, NewSup}} ->
+ {Res,NewData} = do_modify_dn(Data, Obj, NewRDN, DelOldRDN, NewSup),
+ send(From,Res),
+ loop(Cpid, NewData);
+
+ {From, {add, Entry, Attrs}} ->
+ {Res,NewData} = do_add(Data, Entry, Attrs),
+ send(From,Res),
+ loop(Cpid, NewData);
+
+ {From, {delete, Entry}} ->
+ {Res,NewData} = do_delete(Data, Entry),
+ send(From,Res),
+ loop(Cpid, NewData);
+
+ {From, {simple_bind, Dn, Passwd}} ->
+ {Res,NewData} = do_simple_bind(Data, Dn, Passwd),
+ send(From,Res),
+ loop(Cpid, NewData);
+
+ {From, {cnt_proc, NewCpid}} ->
+ unlink(Cpid),
+ send(From,ok),
+ ?PRINT("New Cpid is: ~p~n",[NewCpid]),
+ loop(NewCpid, Data);
+
+ {_From, close} ->
+ unlink(Cpid),
+ exit(closed);
+
+ {Cpid, 'EXIT', Reason} ->
+ ?PRINT("Got EXIT from Cpid, reason=~p~n",[Reason]),
+ exit(Reason);
+
+ _XX ->
+ ?PRINT("loop got: ~p~n",[_XX]),
+ loop(Cpid, Data)
+
+ end.
+
+%%% --------------------------------------------------------------------
+%%% bindRequest
+%%% --------------------------------------------------------------------
+
+%%% Authenticate ourselves to the directory using
+%%% simple authentication.
+
+do_simple_bind(Data, anon, anon) -> %% For testing
+ do_the_simple_bind(Data, "", "");
+do_simple_bind(Data, Dn, _Passwd) when Dn=="",Data#eldap.anon_auth==false ->
+ {{error,anonymous_auth},Data};
+do_simple_bind(Data, _Dn, Passwd) when Passwd=="",Data#eldap.anon_auth==false ->
+ {{error,anonymous_auth},Data};
+do_simple_bind(Data, Dn, Passwd) ->
+ do_the_simple_bind(Data, Dn, Passwd).
+
+do_the_simple_bind(Data, Dn, Passwd) ->
+ case catch exec_simple_bind(Data#eldap{binddn = Dn,
+ passwd = Passwd,
+ id = bump_id(Data)}) of
+ {ok,NewData} -> {ok,NewData};
+ {error,Emsg} -> {{error,Emsg},Data};
+ Else -> {{error,Else},Data}
+ end.
+
+exec_simple_bind(Data) ->
+ Req = #'BindRequest'{version = Data#eldap.version,
+ name = Data#eldap.binddn,
+ authentication = {simple, Data#eldap.passwd}},
+ log2(Data, "bind request = ~p~n", [Req]),
+ Reply = request(Data#eldap.fd, Data, Data#eldap.id, {bindRequest, Req}),
+ log2(Data, "bind reply = ~p~n", [Reply]),
+ exec_simple_bind_reply(Data, Reply).
+
+exec_simple_bind_reply(Data, {ok,Msg}) when
+ Msg#'LDAPMessage'.messageID == Data#eldap.id ->
+ case Msg#'LDAPMessage'.protocolOp of
+ {bindResponse, Result} ->
+ case Result#'BindResponse'.resultCode of
+ success -> {ok,Data};
+ Error -> {error, Error}
+ end;
+ Other -> {error, Other}
+ end;
+exec_simple_bind_reply(_, Error) ->
+ {error, Error}.
+
+
+%%% --------------------------------------------------------------------
+%%% searchRequest
+%%% --------------------------------------------------------------------
+
+do_search(Data, A) ->
+ case catch do_search_0(Data, A) of
+ {error,Emsg} -> {ldap_closed_p(Data, Emsg),Data};
+ {'EXIT',Error} -> {ldap_closed_p(Data, Error),Data};
+ {ok,Res,Ref,NewData} -> {{ok,polish(Res, Ref)},NewData};
+ Else -> {ldap_closed_p(Data, Else),Data}
+ end.
+
+%%%
+%%% Polish the returned search result
+%%%
+
+polish(Res, Ref) ->
+ R = polish_result(Res),
+ %%% No special treatment of referrals at the moment.
+ #eldap_search_result{entries = R,
+ referrals = Ref}.
+
+polish_result([H|T]) when is_record(H, 'SearchResultEntry') ->
+ ObjectName = H#'SearchResultEntry'.objectName,
+ F = fun({_,A,V}) -> {A,V} end,
+ Attrs = lists:map(F, H#'SearchResultEntry'.attributes),
+ [#eldap_entry{object_name = ObjectName,
+ attributes = Attrs}|
+ polish_result(T)];
+polish_result([]) ->
+ [].
+
+do_search_0(Data, A) ->
+ Req = #'SearchRequest'{baseObject = A#eldap_search.base,
+ scope = v_scope(A#eldap_search.scope),
+ derefAliases = neverDerefAliases,
+ sizeLimit = 0, % no size limit
+ timeLimit = v_timeout(A#eldap_search.timeout),
+ typesOnly = v_bool(A#eldap_search.types_only),
+ filter = v_filter(A#eldap_search.filter),
+ attributes = v_attributes(A#eldap_search.attributes)
+ },
+ Id = bump_id(Data),
+ collect_search_responses(Data#eldap{id=Id}, Req, Id).
+
+%%% The returned answers cames in one packet per entry
+%%% mixed with possible referals
+
+collect_search_responses(Data, Req, ID) ->
+ S = Data#eldap.fd,
+ log2(Data, "search request = ~p~n", [Req]),
+ send_request(S, Data, ID, {searchRequest, Req}),
+ Resp = recv_response(S, Data),
+ log2(Data, "search reply = ~p~n", [Resp]),
+ collect_search_responses(Data, S, ID, Resp, [], []).
+
+collect_search_responses(Data, S, ID, {ok,Msg}, Acc, Ref)
+ when is_record(Msg,'LDAPMessage') ->
+ case Msg#'LDAPMessage'.protocolOp of
+ {'searchResDone',R} when R#'LDAPResult'.resultCode == success ->
+ log2(Data, "search reply = searchResDone ~n", []),
+ {ok,Acc,Ref,Data};
+ {'searchResEntry',R} when is_record(R,'SearchResultEntry') ->
+ Resp = recv_response(S, Data),
+ log2(Data, "search reply = ~p~n", [Resp]),
+ collect_search_responses(Data, S, ID, Resp, [R|Acc], Ref);
+ {'searchResRef',R} ->
+ %% At the moment we don't do anyting sensible here since
+ %% I haven't been able to trigger the server to generate
+ %% a response like this.
+ Resp = recv_response(S, Data),
+ log2(Data, "search reply = ~p~n", [Resp]),
+ collect_search_responses(Data, S, ID, Resp, Acc, [R|Ref]);
+ Else ->
+ throw({error,Else})
+ end;
+collect_search_responses(_, _, _, Else, _, _) ->
+ throw({error,Else}).
+
+%%% --------------------------------------------------------------------
+%%% addRequest
+%%% --------------------------------------------------------------------
+
+do_add(Data, Entry, Attrs) ->
+ case catch do_add_0(Data, Entry, Attrs) of
+ {error,Emsg} -> {ldap_closed_p(Data, Emsg),Data};
+ {'EXIT',Error} -> {ldap_closed_p(Data, Error),Data};
+ {ok,NewData} -> {ok,NewData};
+ Else -> {ldap_closed_p(Data, Else),Data}
+ end.
+
+do_add_0(Data, Entry, Attrs) ->
+ Req = #'AddRequest'{entry = Entry,
+ attributes = Attrs},
+ S = Data#eldap.fd,
+ Id = bump_id(Data),
+ log2(Data, "add request = ~p~n", [Req]),
+ Resp = request(S, Data, Id, {addRequest, Req}),
+ log2(Data, "add reply = ~p~n", [Resp]),
+ check_reply(Data#eldap{id = Id}, Resp, addResponse).
+
+
+%%% --------------------------------------------------------------------
+%%% deleteRequest
+%%% --------------------------------------------------------------------
+
+do_delete(Data, Entry) ->
+ case catch do_delete_0(Data, Entry) of
+ {error,Emsg} -> {ldap_closed_p(Data, Emsg),Data};
+ {'EXIT',Error} -> {ldap_closed_p(Data, Error),Data};
+ {ok,NewData} -> {ok,NewData};
+ Else -> {ldap_closed_p(Data, Else),Data}
+ end.
+
+do_delete_0(Data, Entry) ->
+ S = Data#eldap.fd,
+ Id = bump_id(Data),
+ log2(Data, "del request = ~p~n", [Entry]),
+ Resp = request(S, Data, Id, {delRequest, Entry}),
+ log2(Data, "del reply = ~p~n", [Resp]),
+ check_reply(Data#eldap{id = Id}, Resp, delResponse).
+
+
+%%% --------------------------------------------------------------------
+%%% modifyRequest
+%%% --------------------------------------------------------------------
+
+do_modify(Data, Obj, Mod) ->
+ case catch do_modify_0(Data, Obj, Mod) of
+ {error,Emsg} -> {ldap_closed_p(Data, Emsg),Data};
+ {'EXIT',Error} -> {ldap_closed_p(Data, Error),Data};
+ {ok,NewData} -> {ok,NewData};
+ Else -> {ldap_closed_p(Data, Else),Data}
+ end.
+
+do_modify_0(Data, Obj, Mod) ->
+ v_modifications(Mod),
+ Req = #'ModifyRequest'{object = Obj,
+ changes = Mod},
+ S = Data#eldap.fd,
+ Id = bump_id(Data),
+ log2(Data, "modify request = ~p~n", [Req]),
+ Resp = request(S, Data, Id, {modifyRequest, Req}),
+ log2(Data, "modify reply = ~p~n", [Resp]),
+ check_reply(Data#eldap{id = Id}, Resp, modifyResponse).
+
+%%% --------------------------------------------------------------------
+%%% modifyDNRequest
+%%% --------------------------------------------------------------------
+
+do_modify_dn(Data, Entry, NewRDN, DelOldRDN, NewSup) ->
+ case catch do_modify_dn_0(Data, Entry, NewRDN, DelOldRDN, NewSup) of
+ {error,Emsg} -> {ldap_closed_p(Data, Emsg),Data};
+ {'EXIT',Error} -> {ldap_closed_p(Data, Error),Data};
+ {ok,NewData} -> {ok,NewData};
+ Else -> {ldap_closed_p(Data, Else),Data}
+ end.
+
+do_modify_dn_0(Data, Entry, NewRDN, DelOldRDN, NewSup) ->
+ Req = #'ModifyDNRequest'{entry = Entry,
+ newrdn = NewRDN,
+ deleteoldrdn = DelOldRDN,
+ newSuperior = NewSup},
+ S = Data#eldap.fd,
+ Id = bump_id(Data),
+ log2(Data, "modify DN request = ~p~n", [Req]),
+ Resp = request(S, Data, Id, {modDNRequest, Req}),
+ log2(Data, "modify DN reply = ~p~n", [Resp]),
+ check_reply(Data#eldap{id = Id}, Resp, modDNResponse).
+
+%%% --------------------------------------------------------------------
+%%% Send an LDAP request and receive the answer
+%%% --------------------------------------------------------------------
+
+request(S, Data, ID, Request) ->
+ send_request(S, Data, ID, Request),
+ recv_response(S, Data).
+
+send_request(S, Data, ID, Request) ->
+ Message = #'LDAPMessage'{messageID = ID,
+ protocolOp = Request},
+ {ok,Bytes} = asn1rt:encode('ELDAPv3', 'LDAPMessage', Message),
+ case do_send(S, Data, Bytes) of
+ {error,Reason} -> throw({gen_tcp_error,Reason});
+ Else -> Else
+ end.
+
+do_send(S, Data, Bytes) when Data#eldap.use_tls == false ->
+ gen_tcp:send(S, Bytes);
+do_send(S, Data, Bytes) when Data#eldap.use_tls == true ->
+ ssl:send(S, Bytes).
+
+do_recv(S, Data, Len, Timeout) when Data#eldap.use_tls == false ->
+ gen_tcp:recv(S, Len, Timeout);
+do_recv(S, Data, Len, Timeout) when Data#eldap.use_tls == true ->
+ ssl:recv(S, Len, Timeout).
+
+recv_response(S, Data) ->
+ Timeout = get(req_timeout), % kludge...
+ case do_recv(S, Data, 0, Timeout) of
+ {ok, Packet} ->
+ check_tag(Packet),
+ case asn1rt:decode('ELDAPv3', 'LDAPMessage', Packet) of
+ {ok,Resp} -> {ok,Resp};
+ Error -> throw(Error)
+ end;
+ {error,Reason} ->
+ throw({gen_tcp_error, Reason});
+ Error ->
+ throw(Error)
+ end.
+
+%%% Sanity check of received packet
+check_tag(Data) ->
+ case asn1rt_ber_bin:decode_tag(b2l(Data)) of
+ {_Tag, Data1, _Rb} ->
+ case asn1rt_ber_bin:decode_length(b2l(Data1)) of
+ {{_Len, _Data2}, _Rb2} -> ok;
+ _ -> throw({error,decoded_tag_length})
+ end;
+ _ -> throw({error,decoded_tag})
+ end.
+
+%%% Check for expected kind of reply
+check_reply(Data, {ok,Msg}, Op) when
+ Msg#'LDAPMessage'.messageID == Data#eldap.id ->
+ case Msg#'LDAPMessage'.protocolOp of
+ {Op, Result} ->
+ case Result#'LDAPResult'.resultCode of
+ success -> {ok,Data};
+ Error -> {error, Error}
+ end;
+ Other -> {error, Other}
+ end;
+check_reply(_, Error, _) ->
+ {error, Error}.
+
+
+%%% --------------------------------------------------------------------
+%%% Verify the input data
+%%% --------------------------------------------------------------------
+
+v_filter({'and',L}) -> {'and',L};
+v_filter({'or', L}) -> {'or',L};
+v_filter({'not',L}) -> {'not',L};
+v_filter({equalityMatch,AV}) -> {equalityMatch,AV};
+v_filter({greaterOrEqual,AV}) -> {greaterOrEqual,AV};
+v_filter({lessOrEqual,AV}) -> {lessOrEqual,AV};
+v_filter({approxMatch,AV}) -> {approxMatch,AV};
+v_filter({present,A}) -> {present,A};
+v_filter({substrings,S}) when is_record(S,'SubstringFilter') -> {substrings,S};
+v_filter(_Filter) -> throw({error,concat(["unknown filter: ",_Filter])}).
+
+v_modifications(Mods) ->
+ F = fun({_,Op,_}) ->
+ case lists:member(Op,[add,delete,replace]) of
+ true -> true;
+ _ -> throw({error,{mod_operation,Op}})
+ end
+ end,
+ lists:foreach(F, Mods).
+
+v_substr([{Key,Str}|T]) when is_list(Str),Key==initial;Key==any;Key==final ->
+ [{Key,Str}|v_substr(T)];
+v_substr([H|_]) ->
+ throw({error,{substring_arg,H}});
+v_substr([]) ->
+ [].
+v_scope(baseObject) -> baseObject;
+v_scope(singleLevel) -> singleLevel;
+v_scope(wholeSubtree) -> wholeSubtree;
+v_scope(_Scope) -> throw({error,concat(["unknown scope: ",_Scope])}).
+
+v_bool(true) -> true;
+v_bool(false) -> false;
+v_bool(_Bool) -> throw({error,concat(["not Boolean: ",_Bool])}).
+
+v_timeout(I) when is_integer(I), I>=0 -> I;
+v_timeout(_I) -> throw({error,concat(["timeout not positive integer: ",_I])}).
+
+v_attributes(Attrs) ->
+ F = fun(A) when is_list(A) -> A;
+ (A) -> throw({error,concat(["attribute not String: ",A])})
+ end,
+ lists:map(F,Attrs).
+
+
+%%% --------------------------------------------------------------------
+%%% Log routines. Call a user provided log routine F.
+%%% --------------------------------------------------------------------
+
+%log1(Data, Str, Args) -> log(Data, Str, Args, 1).
+log2(Data, Str, Args) -> log(Data, Str, Args, 2).
+
+log(Data, Str, Args, Level) when is_function(Data#eldap.log) ->
+ catch (Data#eldap.log)(Level, Str, Args);
+log(_, _, _, _) ->
+ ok.
+
+
+%%% --------------------------------------------------------------------
+%%% Misc. routines
+%%% --------------------------------------------------------------------
+
+send(To,Msg) -> To ! {self(),Msg}.
+recv(From) -> receive {From,Msg} -> Msg end.
+
+ldap_closed_p(Data, Emsg) when Data#eldap.use_tls == true ->
+ %% Check if the SSL socket seems to be alive or not
+ case catch ssl:sockname(Data#eldap.fd) of
+ {error, _} ->
+ ssl:close(Data#eldap.fd),
+ {error, ldap_closed};
+ {ok, _} ->
+ {error, Emsg};
+ _ ->
+ %% sockname crashes if the socket pid is not alive
+ {error, ldap_closed}
+ end;
+ldap_closed_p(Data, Emsg) ->
+ %% non-SSL socket
+ case inet:port(Data#eldap.fd) of
+ {error,_} -> {error, ldap_closed};
+ _ -> {error,Emsg}
+ end.
+
+bump_id(Data) -> Data#eldap.id + 1.
+
+
+%%% --------------------------------------------------------------------
+%%% parse_dn/1 - Implementation of RFC 2253:
+%%%
+%%% "UTF-8 String Representation of Distinguished Names"
+%%%
+%%% Test cases:
+%%%
+%%% The simplest case:
+%%%
+%%% 1> eldap:parse_dn("CN=Steve Kille,O=Isode Limited,C=GB").
+%%% {ok,[[{attribute_type_and_value,"CN","Steve Kille"}],
+%%% [{attribute_type_and_value,"O","Isode Limited"}],
+%%% [{attribute_type_and_value,"C","GB"}]]}
+%%%
+%%% The first RDN is multi-valued:
+%%%
+%%% 2> eldap:parse_dn("OU=Sales+CN=J. Smith,O=Widget Inc.,C=US").
+%%% {ok,[[{attribute_type_and_value,"OU","Sales"},
+%%% {attribute_type_and_value,"CN","J. Smith"}],
+%%% [{attribute_type_and_value,"O","Widget Inc."}],
+%%% [{attribute_type_and_value,"C","US"}]]}
+%%%
+%%% Quoting a comma:
+%%%
+%%% 3> eldap:parse_dn("CN=L. Eagle,O=Sue\\, Grabbit and Runn,C=GB").
+%%% {ok,[[{attribute_type_and_value,"CN","L. Eagle"}],
+%%% [{attribute_type_and_value,"O","Sue\\, Grabbit and Runn"}],
+%%% [{attribute_type_and_value,"C","GB"}]]}
+%%%
+%%% A value contains a carriage return:
+%%%
+%%% 4> eldap:parse_dn("CN=Before
+%%% 4> After,O=Test,C=GB").
+%%% {ok,[[{attribute_type_and_value,"CN","Before\nAfter"}],
+%%% [{attribute_type_and_value,"O","Test"}],
+%%% [{attribute_type_and_value,"C","GB"}]]}
+%%%
+%%% 5> eldap:parse_dn("CN=Before\\0DAfter,O=Test,C=GB").
+%%% {ok,[[{attribute_type_and_value,"CN","Before\\0DAfter"}],
+%%% [{attribute_type_and_value,"O","Test"}],
+%%% [{attribute_type_and_value,"C","GB"}]]}
+%%%
+%%% An RDN in OID form:
+%%%
+%%% 6> eldap:parse_dn("1.3.6.1.4.1.1466.0=#04024869,O=Test,C=GB").
+%%% {ok,[[{attribute_type_and_value,"1.3.6.1.4.1.1466.0","#04024869"}],
+%%% [{attribute_type_and_value,"O","Test"}],
+%%% [{attribute_type_and_value,"C","GB"}]]}
+%%%
+%%%
+%%% --------------------------------------------------------------------
+
+parse_dn("") -> % empty DN string
+ {ok,[]};
+parse_dn([H|_] = Str) when H=/=$, -> % 1:st name-component !
+ case catch parse_name(Str,[]) of
+ {'EXIT',Reason} -> {parse_error,internal_error,Reason};
+ Else -> Else
+ end.
+
+parse_name("",Acc) ->
+ {ok,lists:reverse(Acc)};
+parse_name([$,|T],Acc) -> % N:th name-component !
+ parse_name(T,Acc);
+parse_name(Str,Acc) ->
+ {Rest,NameComponent} = parse_name_component(Str),
+ parse_name(Rest,[NameComponent|Acc]).
+
+parse_name_component(Str) ->
+ parse_name_component(Str,[]).
+
+parse_name_component(Str,Acc) ->
+ case parse_attribute_type_and_value(Str) of
+ {[$+|Rest], ATV} ->
+ parse_name_component(Rest,[ATV|Acc]);
+ {Rest,ATV} ->
+ {Rest,lists:reverse([ATV|Acc])}
+ end.
+
+parse_attribute_type_and_value(Str) ->
+ case parse_attribute_type(Str) of
+ {_Rest,[]} ->
+ parse_error(expecting_attribute_type,Str);
+ {Rest,Type} ->
+ Rest2 = parse_equal_sign(Rest),
+ {Rest3,Value} = parse_attribute_value(Rest2),
+ {Rest3,{attribute_type_and_value,Type,Value}}
+ end.
+
+-define(IS_ALPHA(X) , X>=$a,X=<$z;X>=$A,X=<$Z ).
+-define(IS_DIGIT(X) , X>=$0,X=<$9 ).
+-define(IS_SPECIAL(X) , X==$,;X==$=;X==$+;X==$<;X==$>;X==$#;X==$; ).
+-define(IS_QUOTECHAR(X) , X=/=$\\,X=/=$" ).
+-define(IS_STRINGCHAR(X) ,
+ X=/=$,,X=/=$=,X=/=$+,X=/=$<,X=/=$>,X=/=$#,X=/=$;,?IS_QUOTECHAR(X) ).
+-define(IS_HEXCHAR(X) , ?IS_DIGIT(X);X>=$a,X=<$f;X>=$A,X=<$F ).
+
+parse_attribute_type([H|T]) when ?IS_ALPHA(H) ->
+ %% NB: It must be an error in the RFC in the definition
+ %% of 'attributeType', should be: (ALPHA *keychar)
+ {Rest,KeyChars} = parse_keychars(T),
+ {Rest,[H|KeyChars]};
+parse_attribute_type([H|_] = Str) when ?IS_DIGIT(H) ->
+ parse_oid(Str);
+parse_attribute_type(Str) ->
+ parse_error(invalid_attribute_type,Str).
+
+
+
+%%% Is a hexstring !
+parse_attribute_value([$#,X,Y|T]) when ?IS_HEXCHAR(X),?IS_HEXCHAR(Y) ->
+ {Rest,HexString} = parse_hexstring(T),
+ {Rest,[$#,X,Y|HexString]};
+%%% Is a "quotation-sequence" !
+parse_attribute_value([$"|T]) ->
+ {Rest,Quotation} = parse_quotation(T),
+ {Rest,[$"|Quotation]};
+%%% Is a stringchar , pair or Empty !
+parse_attribute_value(Str) ->
+ parse_string(Str).
+
+parse_hexstring(Str) ->
+ parse_hexstring(Str,[]).
+
+parse_hexstring([X,Y|T],Acc) when ?IS_HEXCHAR(X),?IS_HEXCHAR(Y) ->
+ parse_hexstring(T,[Y,X|Acc]);
+parse_hexstring(T,Acc) ->
+ {T,lists:reverse(Acc)}.
+
+parse_quotation([$"|T]) -> % an empty: "" is ok !
+ {T,[$"]};
+parse_quotation(Str) ->
+ parse_quotation(Str,[]).
+
+%%% Parse to end of quotation
+parse_quotation([$"|T],Acc) ->
+ {T,lists:reverse([$"|Acc])};
+parse_quotation([X|T],Acc) when ?IS_QUOTECHAR(X) ->
+ parse_quotation(T,[X|Acc]);
+parse_quotation([$\\,X|T],Acc) when ?IS_SPECIAL(X) ->
+ parse_quotation(T,[X,$\\|Acc]);
+parse_quotation([$\\,$\\|T],Acc) ->
+ parse_quotation(T,[$\\,$\\|Acc]);
+parse_quotation([$\\,$"|T],Acc) ->
+ parse_quotation(T,[$",$\\|Acc]);
+parse_quotation([$\\,X,Y|T],Acc) when ?IS_HEXCHAR(X),?IS_HEXCHAR(Y) ->
+ parse_quotation(T,[Y,X,$\\|Acc]);
+parse_quotation(T,_) ->
+ parse_error(expecting_double_quote_mark,T).
+
+parse_string(Str) ->
+ parse_string(Str,[]).
+
+parse_string("",Acc) ->
+ {"",lists:reverse(Acc)};
+parse_string([H|T],Acc) when ?IS_STRINGCHAR(H) ->
+ parse_string(T,[H|Acc]);
+parse_string([$\\,X|T],Acc) when ?IS_SPECIAL(X) -> % is a pair !
+ parse_string(T,[X,$\\|Acc]);
+parse_string([$\\,$\\|T],Acc) -> % is a pair !
+ parse_string(T,[$\\,$\\|Acc]);
+parse_string([$\\,$" |T],Acc) -> % is a pair !
+ parse_string(T,[$" ,$\\|Acc]);
+parse_string([$\\,X,Y|T],Acc) when ?IS_HEXCHAR(X),?IS_HEXCHAR(Y) -> % is a pair!
+ parse_string(T,[Y,X,$\\|Acc]);
+parse_string(T,Acc) ->
+ {T,lists:reverse(Acc)}.
+
+parse_equal_sign([$=|T]) -> T;
+parse_equal_sign(T) -> parse_error(expecting_equal_sign,T).
+
+parse_keychars(Str) -> parse_keychars(Str,[]).
+
+parse_keychars([H|T],Acc) when ?IS_ALPHA(H) -> parse_keychars(T,[H|Acc]);
+parse_keychars([H|T],Acc) when ?IS_DIGIT(H) -> parse_keychars(T,[H|Acc]);
+parse_keychars([$-|T],Acc) -> parse_keychars(T,[$-|Acc]);
+parse_keychars(T,Acc) -> {T,lists:reverse(Acc)}.
+
+parse_oid(Str) -> parse_oid(Str,[]).
+
+parse_oid([H,$.|T], Acc) when ?IS_DIGIT(H) ->
+ parse_oid(T,[$.,H|Acc]);
+parse_oid([H|T], Acc) when ?IS_DIGIT(H) ->
+ parse_oid(T,[H|Acc]);
+parse_oid(T, Acc) ->
+ {T,lists:reverse(Acc)}.
+
+parse_error(Emsg,Rest) ->
+ throw({parse_error,Emsg,Rest}).
+
+
+%%% --------------------------------------------------------------------
+%%% Parse LDAP url according to RFC 2255
+%%%
+%%% Test case:
+%%%
+%%% 2> eldap:parse_ldap_url("ldap://10.42.126.33:389/cn=Administrative%20CA,o=Post%20Danmark,c=DK?certificateRevokationList;binary").
+%%% {ok,{{10,42,126,33},389},
+%%% [[{attribute_type_and_value,"cn","Administrative%20CA"}],
+%%% [{attribute_type_and_value,"o","Post%20Danmark"}],
+%%% [{attribute_type_and_value,"c","DK"}]],
+%%% {attributes,["certificateRevokationList;binary"]}}
+%%%
+%%% --------------------------------------------------------------------
+
+parse_ldap_url("ldap://" ++ Rest1 = Str) ->
+ {Rest2,HostPort} = parse_hostport(Rest1),
+ %% Split the string into DN and Attributes+etc
+ {Sdn,Rest3} = split_string(rm_leading_slash(Rest2),$?),
+ case parse_dn(Sdn) of
+ {parse_error,internal_error,_Reason} ->
+ {parse_error,internal_error,{Str,[]}};
+ {parse_error,Emsg,Tail} ->
+ Head = get_head(Str,Tail),
+ {parse_error,Emsg,{Head,Tail}};
+ {ok,DN} ->
+ %% We stop parsing here for now and leave
+ %% 'scope', 'filter' and 'extensions' to
+ %% be implemented later if needed.
+ {_Rest4,Attributes} = parse_attributes(Rest3),
+ {ok,HostPort,DN,Attributes}
+ end.
+
+rm_leading_slash([$/|Tail]) -> Tail;
+rm_leading_slash(Tail) -> Tail.
+
+parse_attributes([$?|Tail]) ->
+ case split_string(Tail,$?) of
+ {[],Attributes} ->
+ {[],{attributes,string:tokens(Attributes,",")}};
+ {Attributes,Rest} ->
+ {Rest,{attributes,string:tokens(Attributes,",")}}
+ end.
+
+parse_hostport(Str) ->
+ {HostPort,Rest} = split_string(Str,$/),
+ case split_string(HostPort,$:) of
+ {Shost,[]} ->
+ {Rest,{parse_host(Rest,Shost),?LDAP_PORT}};
+ {Shost,[$:|Sport]} ->
+ {Rest,{parse_host(Rest,Shost),
+ parse_port(Rest,Sport)}}
+ end.
+
+parse_port(Rest,Sport) ->
+ case list_to_integer(Sport) of
+ Port when is_integer(Port) -> Port;
+ _ -> parse_error(parsing_port,Rest)
+ end.
+
+parse_host(Rest,Shost) ->
+ case catch validate_host(Shost) of
+ {parse_error,Emsg,_} -> parse_error(Emsg,Rest);
+ Host -> Host
+ end.
+
+validate_host(Shost) ->
+ case inet_parse:address(Shost) of
+ {ok,Host} -> Host;
+ _ ->
+ case inet_parse:domain(Shost) of
+ true -> Shost;
+ _ -> parse_error(parsing_host,Shost)
+ end
+ end.
+
+
+split_string(Str,Key) ->
+ Pred = fun(X) when X==Key -> false; (_) -> true end,
+ lists:splitwith(Pred, Str).
+
+get_head(Str,Tail) ->
+ get_head(Str,Tail,[]).
+
+%%% Should always succeed !
+get_head([H|Tail],Tail,Rhead) -> lists:reverse([H|Rhead]);
+get_head([H|Rest],Tail,Rhead) -> get_head(Rest,Tail,[H|Rhead]).
+
+b2l(B) when is_binary(B) -> B;
+b2l(L) when is_list(L) -> list_to_binary(L).
+