new option ldap_tls_verify is added (EJAB-1229)

doc/guide.tex

@@ -2187,6 +2187,11 @@ Allowed values are: \term{none}, \term{tls}.
 The value \term{tls} enables encryption by using LDAP over SSL.
 Note that STARTTLS encryption is not supported.
 The default value is: \term{none}.
+\titem{\{ldap\_tls\_verify, false|soft|hard\}} \ind{options!ldap\_tls\_verify}
+This option specifies whether to verify LDAP server certificate or not when TLS is enabled.
+When \term{hard} is enabled \ejabberd{} doesn't proceed if a certificate is invalid.
+When \term{soft} is enabled \ejabberd{} proceeds even if check fails.
+The default is \term{false} which means no checks are performed.
 \titem{\{ldap\_port, Number\}} \ind{options!ldap\_port}Port to connect to your LDAP server.
 The default port is~389 if encryption is disabled; and 636 if encryption is enabled.
 If you configure a value, it is stored in \ejabberd{}'s database.

src/ejabberd_auth_ldap.erl

@@ -66,7 +66,7 @@
 		servers,
 		backups,
 		port,
-		encrypt,
+		tls_options,
 		dn,
 		password,
 		base,
@@ -119,19 +119,19 @@ terminate(_Reason, _State) ->
 init(Host) ->
     State = parse_options(Host),
     eldap_pool:start_link(State#state.eldap_id,
-		     State#state.servers,
-		     State#state.backups,
-		     State#state.port,
-		     State#state.dn,
-		     State#state.password,
-		     State#state.encrypt),
+			  State#state.servers,
+			  State#state.backups,
+			  State#state.port,
+			  State#state.dn,
+			  State#state.password,
+			  State#state.tls_options),
     eldap_pool:start_link(State#state.bind_eldap_id,
-		     State#state.servers,
-		     State#state.backups,
-		     State#state.port,
-		     State#state.dn,
-		     State#state.password,
-		     State#state.encrypt),
+			  State#state.servers,
+			  State#state.backups,
+			  State#state.port,
+			  State#state.dn,
+			  State#state.password,
+			  State#state.tls_options),
     {ok, State}.
 
 plain_password_required() ->
@@ -373,6 +373,7 @@ parse_options(Host) ->
 		   Backups -> Backups
 		   end,
     LDAPEncrypt = ejabberd_config:get_local_option({ldap_encrypt, Host}),
+    LDAPTLSVerify = ejabberd_config:get_local_option({ldap_tls_verify, Host}),
     LDAPPort = case ejabberd_config:get_local_option({ldap_port, Host}) of
 		   undefined -> case LDAPEncrypt of
 				    tls -> ?LDAPS_PORT;
@@ -417,7 +418,8 @@ parse_options(Host) ->
 	   servers = LDAPServers,
 	   backups = LDAPBackups,
 	   port = LDAPPort,
-	   encrypt = LDAPEncrypt,
+	   tls_options = [{encrypt, LDAPEncrypt},
+			  {tls_verify, LDAPTLSVerify}],
 	   dn = RootDN,
 	   password = Password,
 	   base = LDAPBase,

src/eldap/eldap.erl

@@ -130,9 +130,10 @@ start_link(Name) ->
     Reg_name = list_to_atom("eldap_" ++ Name),
     gen_fsm:start_link({local, Reg_name}, ?MODULE, [], []).
 
-start_link(Name, Hosts, Port, Rootdn, Passwd, Encrypt) ->
+start_link(Name, Hosts, Port, Rootdn, Passwd, Opts) ->
     Reg_name = list_to_atom("eldap_" ++ Name),
-    gen_fsm:start_link({local, Reg_name}, ?MODULE, {Hosts, Port, Rootdn, Passwd, Encrypt}, []).
+    gen_fsm:start_link({local, Reg_name}, ?MODULE,
+		       {Hosts, Port, Rootdn, Passwd, Opts}, []).
 
 %%% --------------------------------------------------------------------
 %%% Get status of connection.
@@ -423,15 +424,19 @@ get_handle(Name) when is_list(Name) -> list_to_atom("eldap_" ++ Name).
 %%----------------------------------------------------------------------
 init([]) ->
     case get_config() of
-	{ok, Hosts, Rootdn, Passwd, Encrypt} ->
-	    init({Hosts, Rootdn, Passwd, Encrypt});
+	{ok, Hosts, Rootdn, Passwd, Opts} ->
+	    init({Hosts, Rootdn, Passwd, Opts});
 	{error, Reason} ->
 	    {stop, Reason}
     end;
-init({Hosts, Port, Rootdn, Passwd, Encrypt}) ->
+init({Hosts, Port, Rootdn, Passwd, Opts}) ->
     catch ssl:start(),
     {X1,X2,X3} = erlang:now(),
     ssl:seed(integer_to_list(X1) ++ integer_to_list(X2) ++ integer_to_list(X3)),
+    Encrypt = case proplists:get_value(encrypt, Opts) of
+		  tls -> tls;
+		  _ -> none
+	      end,
     PortTemp = case Port of
 		   undefined ->
 		       case Encrypt of
@@ -444,7 +449,14 @@ init({Hosts, Port, Rootdn, Passwd, Encrypt}) ->
 		       end;
 		   PT -> PT
 	       end,
-    TLSOpts = [verify_none],
+    TLSOpts = case proplists:get_value(tls_verify, Opts) of
+		  soft ->
+		      [{verify, 1}];
+		  hard ->
+		      [{verify, 2}];
+		  _ ->
+		      [{verify, 0}]
+	      end,
     {ok, connecting, #eldap{hosts = Hosts,
 			    port = PortTemp,
 			    rootdn = Rootdn,
@@ -958,7 +970,7 @@ connect_bind(S) ->
 		     tls ->
 			 SockMod = ssl,
 			 SslOpts = [{packet, asn1}, {active, true}, {keepalive, true},
-				    binary],
+				    binary | S#eldap.tls_options],
 			 ssl:connect(Host, S#eldap.port, SslOpts);
 		     %% starttls -> %% TODO: Implement STARTTLS;
 		     _ ->
@@ -1074,8 +1086,8 @@ get_config() ->
     case file:consult(File) of
 	{ok, Entries} ->
 	    case catch parse(Entries) of
-		{ok, Hosts, Port, Rootdn, Passwd, Encrypt} ->
-		    {ok, Hosts, Port, Rootdn, Passwd, Encrypt};
+		{ok, Hosts, Port, Rootdn, Passwd, Opts} ->
+		    {ok, Hosts, Port, Rootdn, Passwd, Opts};
 		{error, Reason} ->
 		    {error, Reason};
 		{'EXIT', Reason} ->
@@ -1091,7 +1103,7 @@ parse(Entries) ->
      get_integer(port, Entries),
      get_list(rootdn, Entries),
      get_list(passwd, Entries),
-     get_atom(encrypt, Entries)}.
+     get_list(options, Entries)}.
 
 get_integer(Key, List) ->
     case lists:keysearch(Key, 1, List) of
@@ -1113,15 +1125,15 @@ get_list(Key, List) ->
 	    throw({error, "No Entry in Config for " ++ atom_to_list(Key)})
     end.
 
-get_atom(Key, List) ->
-    case lists:keysearch(Key, 1, List) of
-	{value, {Key, Value}} when is_atom(Value) ->
-	    Value;
-	{value, {Key, _Value}} ->
-	    throw({error, "Bad Value in Config for " ++ atom_to_list(Key)});
-	false ->
-	    throw({error, "No Entry in Config for " ++ atom_to_list(Key)})
-    end.
+%% get_atom(Key, List) ->
+%%     case lists:keysearch(Key, 1, List) of
+%% 	{value, {Key, Value}} when is_atom(Value) ->
+%% 	    Value;
+%% 	{value, {Key, _Value}} ->
+%% 	    throw({error, "Bad Value in Config for " ++ atom_to_list(Key)});
+%% 	false ->
+%% 	    throw({error, "No Entry in Config for " ++ atom_to_list(Key)})
+%%     end.
 
 get_hosts(Key, List) ->
     lists:map(fun({Key1, {A,B,C,D}}) when is_integer(A),

src/eldap/eldap_pool.erl

@@ -49,18 +49,20 @@ search(PoolName, Opts) ->
 modify_passwd(PoolName, DN, Passwd) ->
     do_request(PoolName, {modify_passwd, [DN, Passwd]}).
 
-start_link(Name, Hosts, Backups, Port, Rootdn, Passwd, Encrypt) ->
+start_link(Name, Hosts, Backups, Port, Rootdn, Passwd, Opts) ->
     PoolName = make_id(Name),
     pg2:create(PoolName),
-    lists:foreach(fun(Host) ->
-			  ID = erlang:ref_to_list(make_ref()),
-			  case catch eldap:start_link(ID, [Host|Backups], Port, Rootdn, Passwd, Encrypt) of
-			      {ok, Pid} ->
-				  pg2:join(PoolName, Pid);
-			      _ ->
-				  error
-			  end
-		  end, Hosts).
+    lists:foreach(
+      fun(Host) ->
+	      ID = erlang:ref_to_list(make_ref()),
+	      case catch eldap:start_link(ID, [Host|Backups], Port,
+					  Rootdn, Passwd, Opts) of
+		  {ok, Pid} ->
+		      pg2:join(PoolName, Pid);
+		  _ ->
+		      error
+	      end
+      end, Hosts).
 
 %%====================================================================
 %% Internal functions

src/mod_vcard_ldap.erl

@@ -62,7 +62,7 @@
 		servers,
 		backups,
 		port,
-		encrypt,
+		tls_options,
 		dn,
 		base,
 		password,
@@ -181,7 +181,7 @@ init([Host, Opts]) ->
 		     State#state.port,
 		     State#state.dn,
 		     State#state.password,
-		     State#state.encrypt),
+		     State#state.tls_options),
     case State#state.search of
 	true ->
 	    ejabberd_router:register_route(State#state.myhost);
@@ -686,6 +686,11 @@ parse_options(Host, Opts) ->
 			  ejabberd_config:get_local_option({ldap_encrypt, Host});
 		      E -> E
 	          end,
+    LDAPTLSVerify = case gen_mod:get_opt(ldap_tls_verify, Opts, undefined) of
+			undefined ->
+			    ejabberd_config:get_local_option({ldap_tls_verify, Host});
+			Verify -> Verify
+		    end,
     LDAPPortTemp = case gen_mod:get_opt(ldap_port, Opts, undefined) of
 		       undefined ->
 			   ejabberd_config:get_local_option({ldap_port, Host});
@@ -766,7 +771,8 @@ parse_options(Host, Opts) ->
 	   servers = LDAPServers,
 	   backups = LDAPBackups,
 	   port = LDAPPort,
-	   encrypt = LDAPEncrypt,
+	   tls_options = [{encrypt, LDAPEncrypt},
+			  {tls_verify, LDAPTLSVerify}],
 	   dn = RootDN,
 	   base = LDAPBase,
 	   password = Password,