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-rw-r--r--lib/ssl/src/tls_connection.erl105
1 files changed, 76 insertions, 29 deletions
diff --git a/lib/ssl/src/tls_connection.erl b/lib/ssl/src/tls_connection.erl
index 32991d3079..b18c69c740 100644
--- a/lib/ssl/src/tls_connection.erl
+++ b/lib/ssl/src/tls_connection.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2007-2016. All Rights Reserved.
+%% Copyright Ericsson AB 2007-2017. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -48,7 +48,7 @@
-export([encode_data/3, encode_alert/3]).
%% State transition handling
--export([next_record/1, next_event/3]).
+-export([next_record/1, next_event/3, next_event/4]).
%% Handshake handling
-export([renegotiate/2, send_handshake/2,
@@ -59,7 +59,8 @@
-export([send_alert/2, close/5]).
%% Data handling
--export([passive_receive/2, next_record_if_active/1, handle_common_event/4, send/3]).
+-export([passive_receive/2, next_record_if_active/1, handle_common_event/4, send/3,
+ socket/5]).
%% gen_statem state functions
-export([init/3, error/3, downgrade/3, %% Initiation and take down states
@@ -117,7 +118,7 @@ send_handshake_flight(#state{socket = Socket,
transport_cb = Transport,
flight_buffer = Flight} = State0) ->
send(Transport, Socket, Flight),
- State0#state{flight_buffer = []}.
+ {State0#state{flight_buffer = []}, []}.
queue_change_cipher(Msg, #state{negotiated_version = Version,
flight_buffer = Flight0,
@@ -191,6 +192,10 @@ init([Role, Host, Port, Socket, Options, User, CbInfo]) ->
callback_mode() ->
state_functions.
+socket(Pid, Transport, Socket, Connection, Tracker) ->
+ tls_socket:socket(Pid, Transport, Socket, Connection, Tracker).
+
+
%%--------------------------------------------------------------------
%% State functions
%%--------------------------------------------------------------------
@@ -275,6 +280,7 @@ hello(internal, #client_hello{client_version = ClientVersion} = Hello,
gen_handshake(ssl_connection, hello, internal, {common_client_hello, Type, ServerHelloExt},
State#state{connection_states = ConnectionStates,
negotiated_version = Version,
+ client_hello_version = ClientVersion,
hashsign_algorithm = HashSign,
session = Session,
negotiated_protocol = Protocol})
@@ -340,12 +346,12 @@ connection(internal, #hello_request{},
renegotiation = {Renegotiation, _}} = State0) ->
Hello = tls_handshake:client_hello(Host, Port, ConnectionStates0, SslOpts,
Cache, CacheCb, Renegotiation, Cert),
- State1 = send_handshake(Hello, State0),
+ {State1, Actions} = send_handshake(Hello, State0),
{Record, State} =
next_record(
State1#state{session = Session0#session{session_id
= Hello#client_hello.session_id}}),
- next_event(hello, Record, State);
+ next_event(hello, Record, State, Actions);
connection(internal, #client_hello{} = Hello,
#state{role = server, allow_renegotiate = true} = State0) ->
%% Mitigate Computational DoS attack
@@ -392,23 +398,36 @@ handle_info({Protocol, _, Data}, StateName,
end;
handle_info({CloseTag, Socket}, StateName,
#state{socket = Socket, close_tag = CloseTag,
+ socket_options = #socket_options{active = Active},
+ protocol_buffers = #protocol_buffers{tls_cipher_texts = CTs},
negotiated_version = Version} = State) ->
+
%% Note that as of TLS 1.1,
%% failure to properly close a connection no longer requires that a
%% session not be resumed. This is a change from TLS 1.0 to conform
%% with widespread implementation practice.
- case Version of
- {1, N} when N >= 1 ->
- ok;
- _ ->
- %% As invalidate_sessions here causes performance issues,
- %% we will conform to the widespread implementation
- %% practice and go aginst the spec
- %%invalidate_session(Role, Host, Port, Session)
- ok
- end,
- ssl_connection:handle_normal_shutdown(?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), StateName, State),
- {stop, {shutdown, transport_closed}};
+
+ case (Active == false) andalso (CTs =/= []) of
+ false ->
+ case Version of
+ {1, N} when N >= 1 ->
+ ok;
+ _ ->
+ %% As invalidate_sessions here causes performance issues,
+ %% we will conform to the widespread implementation
+ %% practice and go aginst the spec
+ %%invalidate_session(Role, Host, Port, Session)
+ ok
+ end,
+
+ ssl_connection:handle_normal_shutdown(?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), StateName, State),
+ {stop, {shutdown, transport_closed}};
+ true ->
+ %% Fixes non-delivery of final TLS record in {active, once}.
+ %% Basically allows the application the opportunity to set {active, once} again
+ %% and then receive the final message.
+ next_event(StateName, no_record, State)
+ end;
handle_info(Msg, StateName, State) ->
ssl_connection:handle_info(Msg, StateName, State).
@@ -424,18 +443,26 @@ handle_common_event(internal, #ssl_tls{type = ?HANDSHAKE, fragment = Data},
ssl_options = Options} = State0) ->
try
{Packets, Buf} = tls_handshake:get_tls_handshake(Version,Data,Buf0, Options),
- State =
+ State1 =
State0#state{protocol_buffers =
Buffers#protocol_buffers{tls_handshake_buffer = Buf}},
- Events = tls_handshake_events(Packets),
- case StateName of
- connection ->
- ssl_connection:hibernate_after(StateName, State, Events);
- _ ->
- {next_state, StateName, State#state{unprocessed_handshake_events = unprocessed_events(Events)}, Events}
- end
+ case Packets of
+ [] ->
+ assert_buffer_sanity(Buf, Options),
+ {Record, State} = next_record(State1),
+ next_event(StateName, Record, State);
+ _ ->
+ Events = tls_handshake_events(Packets),
+ case StateName of
+ connection ->
+ ssl_connection:hibernate_after(StateName, State1, Events);
+ _ ->
+ {next_state, StateName,
+ State1#state{unprocessed_handshake_events = unprocessed_events(Events)}, Events}
+ end
+ end
catch throw:#alert{} = Alert ->
- ssl_connection:handle_own_alert(Alert, Version, StateName, State0)
+ ssl_connection:handle_own_alert(Alert, Version, StateName, State0)
end;
%%% TLS record protocol level application data messages
handle_common_event(internal, #ssl_tls{type = ?APPLICATION_DATA, fragment = Data}, StateName, State) ->
@@ -615,8 +642,6 @@ next_event(StateName, Record, State, Actions) ->
{next_state, StateName, State, [{next_event, internal, Alert} | Actions]}
end.
-tls_handshake_events([]) ->
- throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, malformed_handshake));
tls_handshake_events(Packets) ->
lists:map(fun(Packet) ->
{next_event, internal, {handshake, Packet}}
@@ -735,3 +760,25 @@ unprocessed_events(Events) ->
%% handshake events left to process before we should
%% process more TLS-records received on the socket.
erlang:length(Events)-1.
+
+
+assert_buffer_sanity(<<?BYTE(_Type), ?UINT24(Length), Rest/binary>>, #ssl_options{max_handshake_size = Max}) when
+ Length =< Max ->
+ case size(Rest) of
+ N when N < Length ->
+ true;
+ N when N > Length ->
+ throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE,
+ too_big_handshake_data));
+ _ ->
+ throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE,
+ malformed_handshake_data))
+ end;
+assert_buffer_sanity(Bin, _) ->
+ case size(Bin) of
+ N when N < 3 ->
+ true;
+ _ ->
+ throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE,
+ malformed_handshake_data))
+ end.
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-22 07:10:53 +0000