151 lines
3.3 KiB
Erlang
151 lines
3.3 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : acl.erl
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%%% Author : Alexey Shchepin <alexey@sevcom.net>
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%%% Purpose : ACL support
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%%% Created : 18 Jan 2003 by Alexey Shchepin <alexey@sevcom.net>
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%%% Id : $Id$
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%%%----------------------------------------------------------------------
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-module(acl).
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-author('alexey@sevcom.net').
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-vsn('$Revision$ ').
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-export([start/0,
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to_record/2,
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add/2,
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add_list/2,
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match_rule/2,
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% for debugging only
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match_acl/2]).
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-include("ejabberd.hrl").
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-record(acl, {aclname, aclspec}).
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start() ->
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mnesia:create_table(acl,
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[{disc_copies, [node()]},
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{type, bag},
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{attributes, record_info(fields, acl)}]),
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mnesia:add_table_copy(acl, node(), ram_copies),
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ok.
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to_record(ACLName, ACLSpec) ->
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#acl{aclname = ACLName, aclspec = ACLSpec}.
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add(ACLName, ACLSpec) ->
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F = fun() ->
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mnesia:write(#acl{aclname = ACLName, aclspec = ACLSpec})
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end,
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mnesia:transaction(F).
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add_list(ACLs, Clear) ->
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F = fun() ->
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if
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Clear ->
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Ks = mnesia:all_keys(acl),
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lists:foreach(fun(K) ->
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mnesia:delete({acl, K})
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end, Ks);
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true ->
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ok
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end,
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lists:foreach(fun(ACL) ->
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case ACL of
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#acl{} ->
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mnesia:write(ACL)
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end
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end, ACLs)
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end,
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case mnesia:transaction(F) of
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{atomic, _} ->
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ok;
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_ ->
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false
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end.
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match_rule(Rule, JID) ->
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case Rule of
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all -> allow;
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none -> deny;
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_ ->
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case ejabberd_config:get_global_option({access, Rule}) of
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undefined ->
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deny;
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ACLs ->
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match_acls(ACLs, JID)
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end
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end.
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match_acls([], _) ->
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deny;
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match_acls([{Access, ACL} | ACLs], JID) ->
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case match_acl(ACL, JID) of
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true ->
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Access;
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_ ->
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match_acls(ACLs, JID)
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end.
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match_acl(ACL, JID) ->
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case ACL of
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all -> true;
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none -> false;
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_ ->
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{User, Server, Resource} = jlib:jid_tolower(JID),
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lists:any(fun(#acl{aclspec = Spec}) ->
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case Spec of
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all ->
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true;
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{user, U} ->
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(U == User) andalso (?MYNAME == Server);
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{user, U, S} ->
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(U == User) andalso (S == Server);
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{server, S} ->
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S == Server;
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{user_regexp, UR} ->
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(?MYNAME == Server) andalso
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is_regexp_match(User, UR);
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{user_regexp, UR, S} ->
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(S == Server) andalso
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is_regexp_match(User, UR);
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{server_regexp, SR} ->
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is_regexp_match(Server, SR);
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{node_regexp, UR, SR} ->
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is_regexp_match(Server, SR) andalso
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is_regexp_match(User, UR);
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{user_glob, UR} ->
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(?MYNAME == Server) andalso
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is_glob_match(User, UR);
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{user_glob, UR, S} ->
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(S == Server) andalso
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is_glob_match(User, UR);
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{server_glob, SR} ->
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is_glob_match(Server, SR);
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{node_glob, UR, SR} ->
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is_glob_match(Server, SR) andalso
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is_glob_match(User, UR)
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end
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end, ets:lookup(acl, ACL))
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end.
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is_regexp_match(String, RegExp) ->
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case regexp:first_match(String, RegExp) of
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nomatch ->
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false;
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{match, _, _} ->
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true;
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{error, ErrDesc} ->
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?ERROR_MSG(
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"Wrong regexp ~p in ACL: ~p",
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[RegExp, lists:flatten(regexp:format_error(ErrDesc))]),
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false
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end.
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is_glob_match(String, Glob) ->
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is_regexp_match(String, regexp:sh_to_awk(Glob)).
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