diff options
Diffstat (limited to 'lib/ssl/src/dtls_connection.erl')
| -rw-r--r-- | lib/ssl/src/dtls_connection.erl | 80 |
1 files changed, 55 insertions, 25 deletions
diff --git a/lib/ssl/src/dtls_connection.erl b/lib/ssl/src/dtls_connection.erl index 745db788e7..9937373e6e 100644 --- a/lib/ssl/src/dtls_connection.erl +++ b/lib/ssl/src/dtls_connection.erl @@ -250,7 +250,7 @@ init({call, From}, {start, Timeout}, Cache, CacheCb, Renegotiation, Cert), Version = Hello#client_hello.client_version, - HelloVersion = dtls_record:lowest_protocol_version(SslOpts#ssl_options.versions), + HelloVersion = dtls_record:hello_version(Version, SslOpts#ssl_options.versions), State1 = prepare_flight(State0#state{negotiated_version = Version}), {State2, Actions} = send_handshake(Hello, State1#state{negotiated_version = HelloVersion}), State3 = State2#state{negotiated_version = Version, %% Requested version @@ -263,9 +263,14 @@ 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) -> - ssl_connection:init(Type, Event, - State#state{flight_state = {retransmit, ?INITIAL_RETRANSMIT_TIMEOUT}}, - ?MODULE); + Result = ssl_connection:init(Type, Event, + State#state{flight_state = {retransmit, ?INITIAL_RETRANSMIT_TIMEOUT}, + protocol_specific = #{current_cookie_secret => dtls_v1:cookie_secret(), + previous_cookie_secret => <<>>}}, + ?MODULE), + 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:init(Type, Event, State#state{flight_state = reliable}, ?MODULE); @@ -288,10 +293,10 @@ error(_, _, _) -> hello(internal, #client_hello{cookie = <<>>, client_version = Version} = Hello, #state{role = server, transport_cb = Transport, - socket = Socket} = State0) -> - %% TODO: not hard code key + socket = Socket, + protocol_specific = #{current_cookie_secret := Secret}} = State0) -> {ok, {IP, Port}} = dtls_socket:peername(Transport, Socket), - Cookie = dtls_handshake:cookie(<<"secret">>, IP, Port, Hello), + Cookie = dtls_handshake:cookie(Secret, IP, Port, Hello), VerifyRequest = dtls_handshake:hello_verify_request(Cookie, Version), State1 = prepare_flight(State0#state{negotiated_version = Version}), {State2, Actions} = send_handshake(VerifyRequest, State1), @@ -299,15 +304,21 @@ hello(internal, #client_hello{cookie = <<>>, next_event(hello, Record, State#state{tls_handshake_history = ssl_handshake:init_handshake_history()}, Actions); hello(internal, #client_hello{cookie = Cookie} = Hello, #state{role = server, transport_cb = Transport, - socket = Socket} = State0) -> + socket = Socket, + protocol_specific = #{current_cookie_secret := Secret, + previous_cookie_secret := PSecret}} = State0) -> {ok, {IP, Port}} = dtls_socket:peername(Transport, Socket), - %% TODO: not hard code key - case dtls_handshake:cookie(<<"secret">>, IP, Port, Hello) of + case dtls_handshake:cookie(Secret, IP, Port, Hello) of Cookie -> handle_client_hello(Hello, State0); _ -> - %% Handle bad cookie as new cookie request RFC 6347 4.1.2 - hello(internal, Hello#client_hello{cookie = <<>>}, State0) + case dtls_handshake:cookie(PSecret, IP, Port, Hello) of + Cookie -> + handle_client_hello(Hello, State0); + _ -> + %% Handle bad cookie as new cookie request RFC 6347 4.1.2 + hello(internal, Hello#client_hello{cookie = <<>>}, State0) + end end; hello(internal, #hello_verify_request{cookie = Cookie}, #state{role = client, host = Host, port = Port, @@ -453,27 +464,46 @@ handle_info({Protocol, _, _, _, Data}, StateName, {stop, {shutdown, own_alert}} end; handle_info({CloseTag, Socket}, StateName, - #state{socket = Socket, close_tag = CloseTag, + #state{socket = Socket, + socket_options = #socket_options{active = Active}, + protocol_buffers = #protocol_buffers{dtls_cipher_texts = CTs}, + close_tag = CloseTag, negotiated_version = Version} = State) -> %% Note that as of DTLS 1.2 (TLS 1.1), %% failure to properly close a connection no longer requires that a %% session not be resumed. This is a change from DTLS 1.0 to conform %% with widespread implementation practice. - case Version of - {254, N} when N =< 253 -> - 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 + {254, N} when N =< 253 -> + 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 DTLS 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(new_cookie_secret, StateName, + #state{protocol_specific = #{current_cookie_secret := Secret} = CookieInfo} = State) -> + erlang:send_after(dtls_v1:cookie_timeout(), self(), new_cookie_secret), + {next_state, StateName, State#state{protocol_specific = + CookieInfo#{current_cookie_secret => dtls_v1:cookie_secret(), + previous_cookie_secret => Secret}}}; handle_info(Msg, StateName, State) -> ssl_connection:handle_info(Msg, StateName, State). + handle_call(Event, From, StateName, State) -> ssl_connection:handle_call(Event, From, StateName, State, ?MODULE). |