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authorIngela Anderton Andin <[email protected]>2017-11-20 21:50:56 +0100
committerIngela Anderton Andin <[email protected]>2017-11-24 11:49:07 +0100
commit186458d0e2cc2fbcbce9fd82d0aea11cbed61967 (patch)
tree2f5562640e4c6430ca3eb299dca3138d49d1b0f5 /lib/ssl
parent17fdd07785c08fb2c0241df1c5ee4fc9cd1f83c5 (diff)
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ssl: Add gracefullness to dtls code
Also make tls code a little more direct for easier uderstanding
Diffstat (limited to 'lib/ssl')
-rw-r--r--lib/ssl/src/dtls_connection.erl78
-rw-r--r--lib/ssl/src/tls_connection.erl31
2 files changed, 70 insertions, 39 deletions
diff --git a/lib/ssl/src/dtls_connection.erl b/lib/ssl/src/dtls_connection.erl
index 1c55e370cb..073cb4009b 100644
--- a/lib/ssl/src/dtls_connection.erl
+++ b/lib/ssl/src/dtls_connection.erl
@@ -444,21 +444,21 @@ init({call, From}, {start, Timeout},
{Record, State} = next_record(State3),
next_event(hello, Record, State, Actions);
init({call, _} = Type, Event, #state{role = server, transport_cb = gen_udp} = State) ->
- Result = ssl_connection:?FUNCTION_NAME(Type, Event,
- State#state{flight_state = {retransmit, ?INITIAL_RETRANSMIT_TIMEOUT},
- protocol_specific = #{current_cookie_secret => dtls_v1:cookie_secret(),
- previous_cookie_secret => <<>>,
- ignored_alerts => 0,
- max_ignored_alerts => 10}},
- ?MODULE),
+ Result = gen_handshake(?FUNCTION_NAME, Type, Event,
+ State#state{flight_state = {retransmit, ?INITIAL_RETRANSMIT_TIMEOUT},
+ protocol_specific = #{current_cookie_secret => dtls_v1:cookie_secret(),
+ previous_cookie_secret => <<>>,
+ ignored_alerts => 0,
+ max_ignored_alerts => 10}}),
erlang:send_after(dtls_v1:cookie_timeout(), self(), new_cookie_secret),
Result;
init({call, _} = Type, Event, #state{role = server} = State) ->
%% I.E. DTLS over sctp
- ssl_connection:?FUNCTION_NAME(Type, Event, State#state{flight_state = reliable}, ?MODULE);
+ gen_handshake(?FUNCTION_NAME, Type, Event, State#state{flight_state = reliable});
init(Type, Event, State) ->
- ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE).
+ gen_handshake(?FUNCTION_NAME, Type, Event, State).
+
%%--------------------------------------------------------------------
-spec error(gen_statem:event_type(),
{start, timeout()} | term(), #state{}) ->
@@ -469,7 +469,7 @@ error(enter, _, State) ->
error({call, From}, {start, _Timeout}, {Error, State}) ->
{stop_and_reply, normal, {reply, From, {error, Error}}, State};
error({call, _} = Call, Msg, State) ->
- ssl_connection:?FUNCTION_NAME(Call, Msg, State, ?MODULE);
+ gen_handshake(?FUNCTION_NAME, Call, Msg, State);
error(_, _, _) ->
{keep_state_and_data, [postpone]}.
@@ -564,11 +564,11 @@ hello(internal, {handshake, {#hello_verify_request{} = Handshake, _}}, State) ->
%% hello_verify should not be in handshake history
{next_state, ?FUNCTION_NAME, State, [{next_event, internal, Handshake}]};
hello(info, Event, State) ->
- handle_info(Event, ?FUNCTION_NAME, State);
+ gen_info(Event, ?FUNCTION_NAME, State);
hello(state_timeout, Event, State) ->
handle_state_timeout(Event, ?FUNCTION_NAME, State);
hello(Type, Event, State) ->
- ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE).
+ gen_handshake(?FUNCTION_NAME, Type, Event, State).
%%--------------------------------------------------------------------
-spec abbreviated(gen_statem:event_type(), term(), #state{}) ->
@@ -578,22 +578,21 @@ abbreviated(enter, _, State0) ->
{State, Actions} = handle_flight_timer(State0),
{keep_state, State, Actions};
abbreviated(info, Event, State) ->
- handle_info(Event, ?FUNCTION_NAME, State);
+ gen_info(Event, ?FUNCTION_NAME, State);
abbreviated(internal = Type,
#change_cipher_spec{type = <<1>>} = Event,
#state{connection_states = ConnectionStates0} = State) ->
ConnectionStates1 = dtls_record:save_current_connection_state(ConnectionStates0, read),
ConnectionStates = dtls_record:next_epoch(ConnectionStates1, read),
- ssl_connection:?FUNCTION_NAME(Type, Event, State#state{connection_states = ConnectionStates}, ?MODULE);
+ gen_handshake(?FUNCTION_NAME, Type, Event, State#state{connection_states = ConnectionStates});
abbreviated(internal = Type, #finished{} = Event, #state{connection_states = ConnectionStates} = State) ->
- ssl_connection:?FUNCTION_NAME(Type, Event,
- prepare_flight(State#state{connection_states = ConnectionStates,
- flight_state = connection}), ?MODULE);
+ gen_handshake(?FUNCTION_NAME, Type, Event,
+ prepare_flight(State#state{connection_states = ConnectionStates,
+ flight_state = connection}));
abbreviated(state_timeout, Event, State) ->
handle_state_timeout(Event, ?FUNCTION_NAME, State);
abbreviated(Type, Event, State) ->
- ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE).
-
+ gen_handshake(?FUNCTION_NAME, Type, Event, State).
%%--------------------------------------------------------------------
-spec certify(gen_statem:event_type(), term(), #state{}) ->
gen_statem:state_function_result().
@@ -602,13 +601,13 @@ certify(enter, _, State0) ->
{State, Actions} = handle_flight_timer(State0),
{keep_state, State, Actions};
certify(info, Event, State) ->
- handle_info(Event, ?FUNCTION_NAME, State);
+ gen_info(Event, ?FUNCTION_NAME, State);
certify(internal = Type, #server_hello_done{} = Event, State) ->
ssl_connection:certify(Type, Event, prepare_flight(State), ?MODULE);
certify(state_timeout, Event, State) ->
handle_state_timeout(Event, ?FUNCTION_NAME, State);
certify(Type, Event, State) ->
- ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE).
+ gen_handshake(?FUNCTION_NAME, Type, Event, State).
%%--------------------------------------------------------------------
-spec cipher(gen_statem:event_type(), term(), #state{}) ->
@@ -618,7 +617,7 @@ cipher(enter, _, State0) ->
{State, Actions} = handle_flight_timer(State0),
{keep_state, State, Actions};
cipher(info, Event, State) ->
- handle_info(Event, ?FUNCTION_NAME, State);
+ gen_info(Event, ?FUNCTION_NAME, State);
cipher(internal = Type, #change_cipher_spec{type = <<1>>} = Event,
#state{connection_states = ConnectionStates0} = State) ->
ConnectionStates1 = dtls_record:save_current_connection_state(ConnectionStates0, read),
@@ -642,7 +641,7 @@ cipher(Type, Event, State) ->
connection(enter, _, State) ->
{keep_state, State};
connection(info, Event, State) ->
- handle_info(Event, ?FUNCTION_NAME, State);
+ gen_info(Event, ?FUNCTION_NAME, State);
connection(internal, #hello_request{}, #state{host = Host, port = Port,
session = #session{own_certificate = Cert} = Session0,
session_cache = Cache, session_cache_cb = CacheCb,
@@ -905,6 +904,39 @@ encode_change_cipher(#change_cipher_spec{}, Version, Epoch, ConnectionStates) ->
decode_alerts(Bin) ->
ssl_alert:decode(Bin).
+gen_handshake(StateName, Type, Event,
+ #state{negotiated_version = Version} = State) ->
+ try ssl_connection:StateName(Type, Event, State, ?MODULE) of
+ Result ->
+ Result
+ catch
+ _:_ ->
+ ssl_connection:handle_own_alert(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE,
+ malformed_handshake_data),
+ Version, StateName, State)
+ end.
+
+gen_info(Event, connection = StateName, #state{negotiated_version = Version} = State) ->
+ try handle_info(Event, StateName, State) of
+ Result ->
+ Result
+ catch
+ _:_ ->
+ ssl_connection:handle_own_alert(?ALERT_REC(?FATAL, ?INTERNAL_ERROR,
+ malformed_data),
+ Version, StateName, State)
+ end;
+
+gen_info(Event, StateName, #state{negotiated_version = Version} = State) ->
+ try handle_info(Event, StateName, State) of
+ Result ->
+ Result
+ catch
+ _:_ ->
+ ssl_connection:handle_own_alert(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE,
+ malformed_handshake_data),
+ Version, StateName, State)
+ end.
unprocessed_events(Events) ->
%% The first handshake event will be processed immediately
%% as it is entered first in the event queue and
diff --git a/lib/ssl/src/tls_connection.erl b/lib/ssl/src/tls_connection.erl
index a4cdce3902..3137643aa9 100644
--- a/lib/ssl/src/tls_connection.erl
+++ b/lib/ssl/src/tls_connection.erl
@@ -431,7 +431,7 @@ init({call, From}, {start, Timeout},
{Record, State} = next_record(State1),
next_event(hello, Record, State);
init(Type, Event, State) ->
- gen_handshake(ssl_connection, ?FUNCTION_NAME, Type, Event, State).
+ gen_handshake(?FUNCTION_NAME, Type, Event, State).
%%--------------------------------------------------------------------
-spec error(gen_statem:event_type(),
@@ -442,7 +442,7 @@ init(Type, Event, State) ->
error({call, From}, {start, _Timeout}, {Error, State}) ->
{stop_and_reply, normal, {reply, From, {error, Error}}, State};
error({call, _} = Call, Msg, State) ->
- ssl_connection:?FUNCTION_NAME(Call, Msg, State, ?MODULE);
+ gen_handshake(?FUNCTION_NAME, Call, Msg, State);
error(_, _, _) ->
{keep_state_and_data, [postpone]}.
@@ -472,14 +472,13 @@ hello(internal, #client_hello{client_version = ClientVersion} = Hello,
undefined -> CurrentProtocol;
_ -> Protocol0
end,
-
- 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})
+ gen_handshake(?FUNCTION_NAME, internal, {common_client_hello, Type, ServerHelloExt},
+ State#state{connection_states = ConnectionStates,
+ negotiated_version = Version,
+ hashsign_algorithm = HashSign,
+ client_hello_version = ClientVersion,
+ session = Session,
+ negotiated_protocol = Protocol})
end;
hello(internal, #server_hello{} = Hello,
#state{connection_states = ConnectionStates0,
@@ -497,7 +496,7 @@ hello(internal, #server_hello{} = Hello,
hello(info, Event, State) ->
gen_info(Event, ?FUNCTION_NAME, State);
hello(Type, Event, State) ->
- gen_handshake(ssl_connection, ?FUNCTION_NAME, Type, Event, State).
+ gen_handshake(?FUNCTION_NAME, Type, Event, State).
%%--------------------------------------------------------------------
-spec abbreviated(gen_statem:event_type(), term(), #state{}) ->
@@ -506,7 +505,7 @@ hello(Type, Event, State) ->
abbreviated(info, Event, State) ->
gen_info(Event, ?FUNCTION_NAME, State);
abbreviated(Type, Event, State) ->
- gen_handshake(ssl_connection, ?FUNCTION_NAME, Type, Event, State).
+ gen_handshake(?FUNCTION_NAME, Type, Event, State).
%%--------------------------------------------------------------------
-spec certify(gen_statem:event_type(), term(), #state{}) ->
@@ -515,7 +514,7 @@ abbreviated(Type, Event, State) ->
certify(info, Event, State) ->
gen_info(Event, ?FUNCTION_NAME, State);
certify(Type, Event, State) ->
- gen_handshake(ssl_connection, ?FUNCTION_NAME, Type, Event, State).
+ gen_handshake(?FUNCTION_NAME, Type, Event, State).
%%--------------------------------------------------------------------
-spec cipher(gen_statem:event_type(), term(), #state{}) ->
@@ -524,7 +523,7 @@ certify(Type, Event, State) ->
cipher(info, Event, State) ->
gen_info(Event, ?FUNCTION_NAME, State);
cipher(Type, Event, State) ->
- gen_handshake(ssl_connection, ?FUNCTION_NAME, Type, Event, State).
+ gen_handshake(?FUNCTION_NAME, Type, Event, State).
%%--------------------------------------------------------------------
-spec connection(gen_statem:event_type(),
@@ -715,9 +714,9 @@ encode_change_cipher(#change_cipher_spec{}, Version, ConnectionStates) ->
decode_alerts(Bin) ->
ssl_alert:decode(Bin).
-gen_handshake(GenConnection, StateName, Type, Event,
+gen_handshake(StateName, Type, Event,
#state{negotiated_version = Version} = State) ->
- try GenConnection:StateName(Type, Event, State, ?MODULE) of
+ try ssl_connection:StateName(Type, Event, State, ?MODULE) of
Result ->
Result
catch