Use old http_uri, crypto and pg2 only with old Erlang/OTP (#3284)

rebar.config

@@ -94,7 +94,10 @@
             {if_var_true, sip, {d, 'SIP'}},
             {if_var_true, stun, {d, 'STUN'}},
             {if_version_above, "20", {d, 'DEPRECATED_GET_STACKTRACE'}},
+            {if_version_below, "21", {d, 'USE_OLD_HTTP_URI'}},
 	    {if_version_below, "22", {d, 'LAGER'}},
+            {if_version_below, "23", {d, 'USE_OLD_CRYPTO_HMAC'}},
+            {if_version_below, "23", {d, 'USE_OLD_PG2'}},
             {if_var_true, roster_gateway_workaround, {d, 'ROSTER_GATWAY_WORKAROUND'}},
             {if_var_match, db_type, mssql, {d, 'mssql'}},
             {if_var_true, elixir, {d, 'ELIXIR_ENABLED'}},

src/ejabberd_config_transformer.erl

@@ -102,8 +102,8 @@ transform(_Host, certfiles, CertFiles1, Acc) ->
 transform(_Host, acme, ACME, Acc) ->
     ACME1 = lists:map(
 	      fun({ca_url, URL} = Opt) ->
-		      case http_uri:parse(binary_to_list(URL)) of
+                      case misc:uri_parse(URL) of
-			  {ok, {_, _, "acme-v01.api.letsencrypt.org", _, _, _}} ->
+			  {ok, _, "acme-v01.api.letsencrypt.org", _, _} ->
 			      NewURL = ejabberd_acme:default_directory_url(),
 			      ?WARNING_MSG("ACME directory URL ~ts defined in "
 					   "option acme->ca_url is deprecated "

src/eldap_pool.erl

@@ -33,6 +33,24 @@
 
 -include("logger.hrl").
 
+-ifdef(USE_OLD_PG2).
+pg_create(PoolName) -> pg2:create(PoolName).
+pg_join(PoolName, Pid) -> pg2:join(PoolName, Pid).
+pg_get_closest_pid(Name) -> pg2:get_closest_pid(Name).
+-else.
+pg_create(_) -> pg:start_link().
+pg_join(PoolName, Pid) -> pg:join(PoolName, Pid).
+pg_get_closest_pid(Group) ->
+    case pg:get_local_members(Group) of
+        [] ->
+            case pg:get_members(Group) of
+                [] -> {error, {no_process, Group}};
+                [Pid | _] -> Pid
+            end;
+        [Pid | _] -> Pid
+    end.
+-endif.
+
 %%====================================================================
 %% API
 %%====================================================================
@@ -48,14 +66,14 @@ modify_passwd(PoolName, DN, Passwd) ->
 start_link(Name, Hosts, Backups, Port, Rootdn, Passwd,
 	   Opts) ->
     PoolName = make_id(Name),
-    pg2:create(PoolName),
+    pg_create(PoolName),
     lists:foreach(fun (Host) ->
 			  ID = list_to_binary(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);
+			    {ok, Pid} -> pg_join(PoolName, Pid);
 			    Err ->
                                   ?ERROR_MSG("Err = ~p", [Err]),
                                   error
@@ -67,7 +85,7 @@ start_link(Name, Hosts, Backups, Port, Rootdn, Passwd,
 %% Internal functions
 %%====================================================================
 do_request(Name, {F, Args}) ->
-    case pg2:get_closest_pid(make_id(Name)) of
+    case pg_get_closest_pid(make_id(Name)) of
       Pid when is_pid(Pid) ->
 	  case catch apply(eldap, F, [Pid | Args]) of
 	    {'EXIT', {timeout, _}} ->

src/misc.erl

@@ -41,6 +41,7 @@
 	 intersection/2, format_val/1, cancel_timer/1, unique_timestamp/0,
 	 is_mucsub_message/1, best_match/2, pmap/2, peach/2, format_exception/4,
 	 get_my_ipv4_address/0, get_my_ipv6_address/0, parse_ip_mask/1,
+	 crypto_hmac/3, crypto_hmac/4, uri_parse/1,
 	 match_ip_mask/3, format_hosts_list/1, format_cycle/1, delete_dir/1]).
 
 %% Deprecated functions
@@ -54,6 +55,26 @@
 
 -type distance_cache() :: #{{string(), string()} => non_neg_integer()}.
 
+-ifdef(USE_OLD_HTTP_URI).
+uri_parse(URL) when is_binary(URL) ->
+    uri_parse(binary_to_list(URL));
+uri_parse(URL) ->
+    {ok, {Scheme, _UserInfo, Host, Port, Path, _Query}} = http_uri:parse(URL),
+    {ok, Scheme, Host, Port, Path}.
+-else.
+uri_parse(URL) ->
+    #{scheme:=Scheme,host:=Host,port:=Port,path:=Path} = uri_string:parse(URL),
+    {ok, Scheme, Host, Port, Path}.
+-endif.
+
+-ifdef(USE_OLD_CRYPTO_HMAC).
+crypto_hmac(Type, Key, Data) -> crypto:hmac(Type, Key, Data).
+crypto_hmac(Type, Key, Data, MacL) -> crypto:hmac(Type, Key, Data, MacL).
+-else.
+crypto_hmac(Type, Key, Data) -> crypto:mac(hmac, Type, Key, Data).
+crypto_hmac(Type, Key, Data, MacL) -> crypto:macN(hmac, Type, Key, Data, MacL).
+-endif.
+
 %%%===================================================================
 %%% API
 %%%===================================================================
@@ -328,7 +349,7 @@ try_url(URL0) ->
 	V when is_binary(V) -> binary_to_list(V);
 	_ -> URL0
     end,
-    case http_uri:parse(URL) of
+    case uri_parse(URL) of
 	{ok, {Scheme, _, _, _, _, _}} when Scheme /= http, Scheme /= https ->
 	    ?ERROR_MSG("Unsupported URI scheme: ~ts", [URL]),
 	    erlang:error(badarg);

src/mod_http_upload.erl

@@ -711,8 +711,8 @@ get_proc_name(ServerHost, ModuleName) ->
 -spec get_proc_name(binary(), atom(), binary()) -> atom().
 get_proc_name(ServerHost, ModuleName, PutURL) ->
     %% Once we depend on OTP >= 20.0, we can use binaries with http_uri.
-    {ok, {_Scheme, _UserInfo, Host0, _Port, Path0, _Query}} =
+    {ok, _Scheme, Host0, _Port, Path0} =
-	http_uri:parse(binary_to_list(expand_host(PutURL, ServerHost))),
+        misc:uri_parse(expand_host(PutURL, ServerHost)),
     Host = jid:nameprep(iolist_to_binary(Host0)),
     Path = str:strip(iolist_to_binary(Path0), right, $/),
     ProcPrefix = <<Host/binary, Path/binary>>,
@@ -934,7 +934,7 @@ make_query_string(Slot, Size, #state{external_secret = Key}) when Key /= <<>> ->
     UrlPath = str:join(Slot, <<$/>>),
     SizeStr = integer_to_binary(Size),
     Data = <<UrlPath/binary, " ", SizeStr/binary>>,
-    HMAC = str:to_hexlist(crypto:hmac(sha256, Key, Data)),
+    HMAC = str:to_hexlist(misc:crypto_hmac(sha256, Key, Data)),
     <<"?v=", HMAC/binary>>;
 make_query_string(_Slot, _Size, _State) ->
     <<>>.

src/mod_mix.erl

@@ -642,7 +642,7 @@ notify_participant_left(Mod, LServer, To, ID) ->
 -spec make_id(jid(), binary()) -> binary().
 make_id(JID, Key) ->
     Data = jid:encode(jid:tolower(jid:remove_resource(JID))),
-    xmpp_util:hex(crypto:hmac(sha256, Data, Key, 10)).
+    xmpp_util:hex(misc:crypto_hmac(sha256, Data, Key, 10)).
 
 %%%===================================================================
 %%% Error generators

src/mod_s2s_dialback.erl

@@ -305,7 +305,7 @@ s2s_out_tls_verify(_, #{server_host := ServerHost, remote_server := RServer}) ->
 make_key(From, To, StreamID) ->
     Secret = ejabberd_config:get_shared_key(),
     str:to_hexlist(
-      crypto:hmac(sha256, str:to_hexlist(crypto:hash(sha256, Secret)),
+      misc:crypto_hmac(sha256, str:to_hexlist(crypto:hash(sha256, Secret)),
 		  [To, " ", From, " ", StreamID])).
 
 -spec send_verify_request(ejabberd_s2s_out:state()) -> ejabberd_s2s_out:state().

src/mod_sip.erl

@@ -357,8 +357,8 @@ mod_opt_type(via) ->
               (econf:and_then(
                  econf:url([tls, tcp, udp]),
                  fun(URI) ->
-                         {ok, {Type, _, Host, Port, _, _}} =
+                         {ok, Type, Host, Port, _} =
-                             http_uri:parse(binary_to_list(URI)),
+                            misc:uri_parse(URI),
                          {Type, {unicode:characters_to_binary(Host), Port}}
                  end))(U)
       end, [unique]).

src/mod_stun_disco.erl

@@ -555,7 +555,7 @@ make_username(ExpireAt, Hash) ->
 
 -spec make_password(binary(), binary()) -> binary().
 make_password(Username, Secret) ->
-    base64:encode(crypto:hmac(sha, Secret, Username)).
+    base64:encode(misc:crypto_hmac(sha, Secret, Username)).
 
 -spec get_password(binary(), binary()) -> binary().
 get_password(Username, HostHash) ->