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-rw-r--r--lib/ssl/src/ssl.erl84
-rw-r--r--lib/ssl/src/ssl_connection.erl114
-rw-r--r--lib/ssl/src/ssl_handshake.erl207
-rw-r--r--lib/ssl/src/ssl_handshake.hrl18
-rw-r--r--lib/ssl/src/ssl_internal.hrl4
5 files changed, 347 insertions, 80 deletions
diff --git a/lib/ssl/src/ssl.erl b/lib/ssl/src/ssl.erl
index 40d933a256..9ed6acd43a 100644
--- a/lib/ssl/src/ssl.erl
+++ b/lib/ssl/src/ssl.erl
@@ -31,7 +31,8 @@
controlling_process/2, listen/2, pid/1, peername/1, peercert/1,
recv/2, recv/3, send/2, getopts/2, setopts/2, sockname/1,
versions/0, session_info/1, format_error/1,
- renegotiate/1, prf/5, clear_pem_cache/0, random_bytes/1]).
+ renegotiate/1, prf/5, clear_pem_cache/0, random_bytes/1, negotiated_next_protocol/1]).
+
-deprecated({pid, 1, next_major_release}).
@@ -65,7 +66,9 @@
{keyfile, path()} | {password, string()} | {cacerts, [Der::binary()]} |
{cacertfile, path()} | {dh, Der::binary()} | {dhfile, path()} |
{ciphers, ciphers()} | {ssl_imp, ssl_imp()} | {reuse_sessions, boolean()} |
- {reuse_session, fun()} | {hibernate_after, integer()|undefined}.
+ {reuse_session, fun()} | {hibernate_after, integer()|undefined} |
+ {next_protocols_advertised, list(binary())} |
+ {client_preferred_next_protocols, binary(), client | server, list(binary())}.
-type verify_type() :: verify_none | verify_peer.
-type path() :: string().
@@ -314,6 +317,14 @@ suite_definition(S) ->
{KeyExchange, Cipher, Hash}.
%%--------------------------------------------------------------------
+-spec negotiated_next_protocol(#sslsocket{}) -> {ok, binary()} | {error, reason()}.
+%%
+%% Description: Returns the next protocol that has been negotiated. If no
+%% protocol has been negotiated will return {error, next_protocol_not_negotiated}
+%%--------------------------------------------------------------------
+negotiated_next_protocol(#sslsocket{fd = new_ssl, pid = Pid}) ->
+ ssl_connection:negotiated_next_protocol(Pid).
+
-spec cipher_suites() -> [erl_cipher_suite()].
-spec cipher_suites(erlang | openssl) -> [erl_cipher_suite()] | [string()].
@@ -594,7 +605,9 @@ handle_options(Opts0, _Role) ->
renegotiate_at = handle_option(renegotiate_at, Opts, ?DEFAULT_RENEGOTIATE_AT),
debug = handle_option(debug, Opts, []),
hibernate_after = handle_option(hibernate_after, Opts, undefined),
- erl_dist = handle_option(erl_dist, Opts, false)
+ erl_dist = handle_option(erl_dist, Opts, false),
+ next_protocols_advertised = handle_option(next_protocols_advertised, Opts, undefined),
+ next_protocol_selector = make_next_protocol_selector(handle_option(client_preferred_next_protocols, Opts, undefined))
},
CbInfo = proplists:get_value(cb_info, Opts, {gen_tcp, tcp, tcp_closed, tcp_error}),
@@ -603,7 +616,8 @@ handle_options(Opts0, _Role) ->
depth, cert, certfile, key, keyfile,
password, cacerts, cacertfile, dh, dhfile, ciphers,
debug, reuse_session, reuse_sessions, ssl_imp,
- cb_info, renegotiate_at, secure_renegotiate, hibernate_after, erl_dist],
+ cb_info, renegotiate_at, secure_renegotiate, hibernate_after, erl_dist, next_protocols_advertised,
+ client_preferred_next_protocols],
SockOpts = lists:foldl(fun(Key, PropList) ->
proplists:delete(Key, PropList)
@@ -728,12 +742,42 @@ validate_option(hibernate_after, undefined) ->
undefined;
validate_option(hibernate_after, Value) when is_integer(Value), Value >= 0 ->
Value;
-validate_option(erl_dist,Value) when Value == true;
+validate_option(erl_dist,Value) when Value == true;
Value == false ->
Value;
+validate_option(client_preferred_next_protocols, {FallbackProtocol, Order, PreferredProtocols} = Value)
+ when is_list(PreferredProtocols), is_binary(FallbackProtocol),
+ byte_size(FallbackProtocol) > 0, byte_size(FallbackProtocol) < 256 ->
+ validate_binary_list(client_preferred_next_protocols, PreferredProtocols),
+ validate_npn_ordering(Order),
+ Value;
+validate_option(client_preferred_next_protocols, undefined) ->
+ undefined;
+validate_option(next_protocols_advertised, Value) when is_list(Value) ->
+ validate_binary_list(next_protocols_advertised, Value),
+ Value;
+validate_option(next_protocols_advertised, undefined) ->
+ undefined;
validate_option(Opt, Value) ->
throw({error, {eoptions, {Opt, Value}}}).
-
+
+validate_npn_ordering(client) ->
+ ok;
+validate_npn_ordering(server) ->
+ ok;
+validate_npn_ordering(Value) ->
+ throw({error, {eoptions, {client_preferred_next_protocols, Value}}}).
+
+validate_binary_list(Opt, List) ->
+ lists:foreach(
+ fun(Bin) when is_binary(Bin),
+ byte_size(Bin) > 0,
+ byte_size(Bin) < 256 ->
+ ok;
+ (Bin) ->
+ throw({error, {eoptions, {Opt, Bin}}})
+ end, List).
+
validate_versions([], Versions) ->
Versions;
validate_versions([Version | Rest], Versions) when Version == 'tlsv1.2';
@@ -839,6 +883,34 @@ cipher_suites(Version, Ciphers0) ->
no_format(Error) ->
lists:flatten(io_lib:format("No format string for error: \"~p\" available.", [Error])).
+
+detect(_Pred, []) ->
+ undefined;
+detect(Pred, [H|T]) ->
+ case Pred(H) of
+ true ->
+ H;
+ _ ->
+ detect(Pred, T)
+ end.
+
+make_next_protocol_selector(undefined) ->
+ undefined;
+make_next_protocol_selector({FallbackProtocol, client, AllProtocols}) ->
+ fun(AdvertisedProtocols) ->
+ case detect(fun(PreferredProtocol) -> lists:member(PreferredProtocol, AdvertisedProtocols) end, AllProtocols) of
+ undefined -> FallbackProtocol;
+ PreferredProtocol -> PreferredProtocol
+ end
+ end;
+
+make_next_protocol_selector({FallbackProtocol, server, AllProtocols}) ->
+ fun(AdvertisedProtocols) ->
+ case detect(fun(PreferredProtocol) -> lists:member(PreferredProtocol, AllProtocols) end, AdvertisedProtocols) of
+ undefined -> FallbackProtocol;
+ PreferredProtocol -> PreferredProtocol
+ end
+ end.
%% Only used to remove exit messages from old ssl
%% First is a nonsense clause to provide some
diff --git a/lib/ssl/src/ssl_connection.erl b/lib/ssl/src/ssl_connection.erl
index ff2556c488..4e3f0bd46d 100644
--- a/lib/ssl/src/ssl_connection.erl
+++ b/lib/ssl/src/ssl_connection.erl
@@ -41,7 +41,7 @@
socket_control/3, close/1, shutdown/2,
new_user/2, get_opts/2, set_opts/2, info/1, session_info/1,
peer_certificate/1, sockname/1, peername/1, renegotiation/1,
- prf/5]).
+ negotiated_next_protocol/1, prf/5]).
%% Called by ssl_connection_sup
-export([start_link/7]).
@@ -92,7 +92,9 @@
start_or_recv_from, % "gen_fsm From"
send_queue, % queue()
terminated = false, %
- allow_renegotiate = true
+ allow_renegotiate = true,
+ expecting_next_protocol_negotiation = false :: boolean(),
+ next_protocol = undefined :: undefined | binary()
}).
-define(DEFAULT_DIFFIE_HELLMAN_PARAMS,
@@ -221,6 +223,13 @@ new_user(ConnectionPid, User) ->
sockname(ConnectionPid) ->
sync_send_all_state_event(ConnectionPid, sockname).
%%--------------------------------------------------------------------
+-spec negotiated_next_protocol(pid()) -> {ok, binary()} | {error, reason()}.
+%%
+%% Description: Returns the negotiated protocol
+%%--------------------------------------------------------------------
+negotiated_next_protocol(ConnectionPid) ->
+ sync_send_all_state_event(ConnectionPid, negotiated_next_protocol).
+%%--------------------------------------------------------------------
-spec peername(pid()) -> {ok, {inet:ip_address(), inet:port_number()}} | {error, reason()}.
%%
%% Description: Same as inet:peername/1
@@ -374,31 +383,41 @@ hello(#server_hello{cipher_suite = CipherSuite,
renegotiation = {Renegotiation, _},
ssl_options = SslOptions} = State0) ->
case ssl_handshake:hello(Hello, SslOptions, ConnectionStates0, Renegotiation) of
- {Version, NewId, ConnectionStates} ->
+ #alert{} = Alert ->
+ handle_own_alert(Alert, ReqVersion, hello, State0),
+ {stop, normal, State0};
+
+ {Version, NewId, ConnectionStates, NextProtocol} ->
{KeyAlgorithm, _, _, _} =
ssl_cipher:suite_definition(CipherSuite),
-
+
PremasterSecret = make_premaster_secret(ReqVersion, KeyAlgorithm),
-
+
+ NewNextProtocol = case NextProtocol of
+ undefined ->
+ State0#state.next_protocol;
+ _ ->
+ NextProtocol
+ end,
+
State = State0#state{key_algorithm = KeyAlgorithm,
hashsign_algorithm = default_hashsign(Version, KeyAlgorithm),
negotiated_version = Version,
connection_states = ConnectionStates,
- premaster_secret = PremasterSecret},
-
+ premaster_secret = PremasterSecret,
+ expecting_next_protocol_negotiation = NextProtocol =/= undefined,
+ next_protocol = NewNextProtocol},
+
case ssl_session:is_new(OldId, NewId) of
true ->
handle_new_session(NewId, CipherSuite, Compression,
State#state{connection_states = ConnectionStates});
false ->
- handle_resumed_session(NewId, State#state{connection_states = ConnectionStates})
- end;
- #alert{} = Alert ->
- handle_own_alert(Alert, ReqVersion, hello, State0),
- {stop, normal, State0}
+ handle_resumed_session(NewId, State#state{connection_states = ConnectionStates})
+ end
end;
-hello(Hello = #client_hello{client_version = ClientVersion},
+hello(Hello = #client_hello{client_version = ClientVersion},
State = #state{connection_states = ConnectionStates0,
port = Port, session = #session{own_certificate = Cert} = Session0,
renegotiation = {Renegotiation, _},
@@ -407,8 +426,8 @@ hello(Hello = #client_hello{client_version = ClientVersion},
ssl_options = SslOpts}) ->
case ssl_handshake:hello(Hello, SslOpts, {Port, Session0, Cache, CacheCb,
ConnectionStates0, Cert}, Renegotiation) of
- {Version, {Type, Session}, ConnectionStates} ->
- do_server_hello(Type, State#state{connection_states =
+ {Version, {Type, Session}, ConnectionStates, ProtocolsToAdvertise} ->
+ do_server_hello(Type, ProtocolsToAdvertise, State#state{connection_states =
ConnectionStates,
negotiated_version = Version,
session = Session});
@@ -593,6 +612,7 @@ certify(#client_key_exchange{exchange_keys = Keys},
{stop, normal, State}
end;
+
certify(timeout, State) ->
{ next_state, certify, State, hibernate };
@@ -662,6 +682,12 @@ cipher(#certificate_verify{signature = Signature, hashsign_algorithm = CertHashS
{stop, normal, State0}
end;
+% client must send a next protocol message if we are expecting it
+cipher(#finished{}, #state{role = server, expecting_next_protocol_negotiation = true,
+ next_protocol = undefined, negotiated_version = Version} = State0) ->
+ handle_own_alert(?ALERT_REC(?FATAL,?UNEXPECTED_MESSAGE), Version, cipher, State0),
+ {stop, normal, State0};
+
cipher(#finished{verify_data = Data} = Finished,
#state{negotiated_version = Version,
host = Host,
@@ -683,6 +709,13 @@ cipher(#finished{verify_data = Data} = Finished,
{stop, normal, State}
end;
+% only allowed to send next_protocol message after change cipher spec
+% & before finished message and it is not allowed during renegotiation
+cipher(#next_protocol{selected_protocol = SelectedProtocol},
+ #state{role = server, expecting_next_protocol_negotiation = true} = State0) ->
+ {Record, State} = next_record(State0#state{next_protocol = SelectedProtocol}),
+ next_state(cipher, cipher, Record, State);
+
cipher(timeout, State) ->
{ next_state, cipher, State, hibernate };
@@ -842,6 +875,10 @@ handle_sync_event(sockname, _From, StateName,
SockNameReply = inet:sockname(Socket),
{reply, SockNameReply, StateName, State, get_timeout(State)};
+handle_sync_event(negotiated_next_protocol, _From, StateName, #state{next_protocol = undefined} = State) ->
+ {reply, {error, next_protocol_not_negotiated}, StateName, State, get_timeout(State)};
+handle_sync_event(negotiated_next_protocol, _From, StateName, #state{next_protocol = NextProtocol} = State) ->
+ {reply, {ok, NextProtocol}, StateName, State, get_timeout(State)};
handle_sync_event(peername, _From, StateName,
#state{socket = Socket} = State) ->
PeerNameReply = inet:peername(Socket),
@@ -1274,17 +1311,20 @@ verify_client_cert(#state{client_certificate_requested = true, role = client,
verify_client_cert(#state{client_certificate_requested = false} = State) ->
State.
-do_server_hello(Type, #state{negotiated_version = Version,
- session = #session{session_id = SessId},
- connection_states = ConnectionStates0,
- renegotiation = {Renegotiation, _}}
- = State0) when is_atom(Type) ->
+
+
+do_server_hello(Type, NextProtocolsToSend, #state{negotiated_version = Version,
+ session = #session{session_id = SessId},
+ connection_states = ConnectionStates0,
+ renegotiation = {Renegotiation, _}}
+ = State0) when is_atom(Type) ->
ServerHello =
ssl_handshake:server_hello(SessId, Version,
- ConnectionStates0, Renegotiation),
- State = server_hello(ServerHello, State0),
-
+ ConnectionStates0, Renegotiation, NextProtocolsToSend),
+ State = server_hello(ServerHello,
+ State0#state{expecting_next_protocol_negotiation =
+ NextProtocolsToSend =/= undefined}),
case Type of
new ->
new_server_hello(ServerHello, State);
@@ -1538,12 +1578,34 @@ request_client_cert(#state{ssl_options = #ssl_options{verify = verify_none}} =
State.
finalize_handshake(State, StateName) ->
- ConnectionStates0 = cipher_protocol(State),
+ ConnectionStates0 = cipher_protocol(State),
+
ConnectionStates =
ssl_record:activate_pending_connection_state(ConnectionStates0,
write),
- finished(State#state{connection_states = ConnectionStates}, StateName).
-
+
+ State1 = State#state{connection_states = ConnectionStates},
+ State2 = next_protocol(State1),
+ finished(State2, StateName).
+
+
+next_protocol(#state{role = server} = State) ->
+ State;
+next_protocol(#state{next_protocol = undefined} = State) ->
+ State;
+next_protocol(#state{expecting_next_protocol_negotiation = false} = State) ->
+ State;
+next_protocol(#state{transport_cb = Transport, socket = Socket,
+ negotiated_version = Version,
+ next_protocol = NextProtocol,
+ connection_states = ConnectionStates0,
+ tls_handshake_history = Handshake0} = State) ->
+ NextProtocolMessage = ssl_handshake:next_protocol(NextProtocol),
+ {BinMsg, ConnectionStates, Handshake} = encode_handshake(NextProtocolMessage, Version, ConnectionStates0, Handshake0),
+ Transport:send(Socket, BinMsg),
+ State#state{connection_states = ConnectionStates,
+ tls_handshake_history = Handshake}.
+
cipher_protocol(#state{connection_states = ConnectionStates0,
socket = Socket,
negotiated_version = Version,
diff --git a/lib/ssl/src/ssl_handshake.erl b/lib/ssl/src/ssl_handshake.erl
index bb26302fff..3b114c1f9c 100644
--- a/lib/ssl/src/ssl_handshake.erl
+++ b/lib/ssl/src/ssl_handshake.erl
@@ -30,14 +30,14 @@
-include("ssl_internal.hrl").
-include_lib("public_key/include/public_key.hrl").
--export([master_secret/4, client_hello/8, server_hello/4, hello/4,
+-export([master_secret/4, client_hello/8, server_hello/5, hello/4,
hello_request/0, certify/7, certificate/4,
client_certificate_verify/6, certificate_verify/6,
certificate_request/3, key_exchange/3, server_key_exchange_hash/2,
finished/5, verify_connection/6, get_tls_handshake/3,
decode_client_key/3, server_hello_done/0,
encode_handshake/2, init_handshake_history/0, update_handshake_history/2,
- decrypt_premaster_secret/2, prf/5]).
+ decrypt_premaster_secret/2, prf/5, next_protocol/1]).
-export([dec_hello_extensions/2]).
@@ -46,6 +46,13 @@
#client_key_exchange{} | #finished{} | #certificate_verify{} |
#hello_request{}.
+encode_client_protocol_negotiation(undefined, _) ->
+ undefined;
+encode_client_protocol_negotiation(_, false) ->
+ #next_protocol_negotiation{extension_data = <<>>};
+encode_client_protocol_negotiation(_, _) ->
+ undefined.
+
%%====================================================================
%% Internal application API
%%====================================================================
@@ -77,18 +84,31 @@ client_hello(Host, Port, ConnectionStates,
cipher_suites = cipher_suites(Ciphers, Renegotiation),
compression_methods = ssl_record:compressions(),
random = SecParams#security_parameters.client_random,
+
renegotiation_info =
renegotiation_info(client, ConnectionStates, Renegotiation),
- hash_signs = default_hash_signs()
+ hash_signs = default_hash_signs(),
+ next_protocol_negotiation =
+ encode_client_protocol_negotiation(SslOpts#ssl_options.next_protocol_selector, Renegotiation)
}.
+encode_protocol(Protocol, Acc) ->
+ Len = byte_size(Protocol),
+ <<Acc/binary, ?BYTE(Len), Protocol/binary>>.
+
+encode_protocols_advertised_on_server(undefined) ->
+ undefined;
+
+encode_protocols_advertised_on_server(Protocols) ->
+ #next_protocol_negotiation{extension_data = lists:foldl(fun encode_protocol/2, <<>>, Protocols)}.
+
%%--------------------------------------------------------------------
-spec server_hello(session_id(), tls_version(), #connection_states{},
- boolean()) -> #server_hello{}.
+ boolean(), list(string())) -> #server_hello{}.
%%
%% Description: Creates a server hello message.
%%--------------------------------------------------------------------
-server_hello(SessionId, Version, ConnectionStates, Renegotiation) ->
+server_hello(SessionId, Version, ConnectionStates, Renegotiation, ProtocolsAdvertisedOnServer) ->
Pending = ssl_record:pending_connection_state(ConnectionStates, read),
SecParams = Pending#connection_state.security_parameters,
#server_hello{server_version = Version,
@@ -98,7 +118,8 @@ server_hello(SessionId, Version, ConnectionStates, Renegotiation) ->
random = SecParams#security_parameters.server_random,
session_id = SessionId,
renegotiation_info =
- renegotiation_info(server, ConnectionStates, Renegotiation)
+ renegotiation_info(server, ConnectionStates, Renegotiation),
+ next_protocol_negotiation = encode_protocols_advertised_on_server(ProtocolsAdvertisedOnServer)
}.
%%--------------------------------------------------------------------
@@ -113,20 +134,21 @@ hello_request() ->
%%--------------------------------------------------------------------
-spec hello(#server_hello{} | #client_hello{}, #ssl_options{},
#connection_states{} | {inet:port_number(), #session{}, db_handle(),
- atom(), #connection_states{}, binary()},
- boolean()) -> {tls_version(), session_id(), #connection_states{}}|
- {tls_version(), {resumed | new, #session{}},
- #connection_states{}} | #alert{}.
+ atom(), #connection_states{}, binary()},
+ boolean()) ->
+ {tls_version(), session_id(), #connection_states{}, binary() | undefined}|
+ {tls_version(), {resumed | new, #session{}}, #connection_states{}, list(binary()) | undefined} |
+ #alert{}.
%%
%% Description: Handles a recieved hello message
%%--------------------------------------------------------------------
hello(#server_hello{cipher_suite = CipherSuite, server_version = Version,
compression_method = Compression, random = Random,
session_id = SessionId, renegotiation_info = Info,
- hash_signs = _HashSigns},
- #ssl_options{secure_renegotiate = SecureRenegotation},
+ hash_signs = _HashSigns} = Hello,
+ #ssl_options{secure_renegotiate = SecureRenegotation, next_protocol_selector = NextProtocolSelector},
ConnectionStates0, Renegotiation) ->
-%%TODO: select hash and signature algorigthm
+ %%TODO: select hash and signature algorigthm
case ssl_record:is_acceptable_version(Version) of
true ->
case handle_renegotiation_info(client, Info, ConnectionStates0,
@@ -135,7 +157,12 @@ hello(#server_hello{cipher_suite = CipherSuite, server_version = Version,
ConnectionStates =
hello_pending_connection_states(client, Version, CipherSuite, Random,
Compression, ConnectionStates1),
- {Version, SessionId, ConnectionStates};
+ case handle_next_protocol(Hello, NextProtocolSelector, Renegotiation) of
+ #alert{} = Alert ->
+ Alert;
+ Protocol ->
+ {Version, SessionId, ConnectionStates, Protocol}
+ end;
#alert{} = Alert ->
Alert
end;
@@ -145,9 +172,8 @@ hello(#server_hello{cipher_suite = CipherSuite, server_version = Version,
hello(#client_hello{client_version = ClientVersion, random = Random,
cipher_suites = CipherSuites,
- renegotiation_info = Info,
- hash_signs = _HashSigns} = Hello,
- #ssl_options{versions = Versions,
+ renegotiation_info = Info} = Hello,
+ #ssl_options{versions = Versions,
secure_renegotiate = SecureRenegotation} = SslOpts,
{Port, Session0, Cache, CacheCb, ConnectionStates0, Cert}, Renegotiation) ->
%% TODO: select hash and signature algorithm
@@ -173,7 +199,12 @@ hello(#client_hello{client_version = ClientVersion, random = Random,
Random,
Compression,
ConnectionStates1),
- {Version, {Type, Session}, ConnectionStates};
+ case handle_next_protocol_on_server(Hello, Renegotiation, SslOpts) of
+ #alert{} = Alert ->
+ Alert;
+ ProtocolsToAdvertise ->
+ {Version, {Type, Session}, ConnectionStates, ProtocolsToAdvertise}
+ end;
#alert{} = Alert ->
Alert
end
@@ -427,6 +458,11 @@ master_secret(Version, PremasterSecret, ConnectionStates, Role) ->
?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE)
end.
+-spec next_protocol(binary()) -> #next_protocol{}.
+
+next_protocol(SelectedProtocol) ->
+ #next_protocol{selected_protocol = SelectedProtocol}.
+
%%--------------------------------------------------------------------
-spec finished(tls_version(), client | server, integer(), binary(), tls_handshake_history()) ->
#finished{}.
@@ -660,6 +696,57 @@ renegotiation_info(server, ConnectionStates, true) ->
#renegotiation_info{renegotiated_connection = undefined}
end.
+decode_next_protocols({next_protocol_negotiation, Protocols}) ->
+ decode_next_protocols(Protocols, []).
+decode_next_protocols(<<>>, Acc) ->
+ lists:reverse(Acc);
+decode_next_protocols(<<?BYTE(Len), Protocol:Len/binary, Rest/binary>>, Acc) ->
+ case Len of
+ 0 ->
+ {error, invalid_next_protocols};
+ _ ->
+ decode_next_protocols(Rest, [Protocol|Acc])
+ end;
+decode_next_protocols(_Bytes, _Acc) ->
+ {error, invalid_next_protocols}.
+
+next_protocol_extension_allowed(NextProtocolSelector, Renegotiating) ->
+ NextProtocolSelector =/= undefined andalso not Renegotiating.
+
+handle_next_protocol_on_server(#client_hello{next_protocol_negotiation = undefined}, _Renegotiation, _SslOpts) ->
+ undefined;
+
+handle_next_protocol_on_server(#client_hello{next_protocol_negotiation = {next_protocol_negotiation,<<>>}},
+ false, #ssl_options{next_protocols_advertised = Protocols}) ->
+ Protocols;
+
+handle_next_protocol_on_server(_Hello, _Renegotiation, _SSLOpts) ->
+ ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE). % unexpected next protocol extension
+
+handle_next_protocol(#server_hello{next_protocol_negotiation = undefined},
+ _NextProtocolSelector, _Renegotiating) ->
+ undefined;
+
+handle_next_protocol(#server_hello{next_protocol_negotiation = Protocols},
+ NextProtocolSelector, Renegotiating) ->
+
+ case next_protocol_extension_allowed(NextProtocolSelector, Renegotiating) of
+ true ->
+ select_next_protocol(decode_next_protocols(Protocols), NextProtocolSelector);
+ false ->
+ ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE) % unexpected next protocol extension
+ end.
+
+select_next_protocol({error, _Reason}, _NextProtocolSelector) ->
+ ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE);
+select_next_protocol(Protocols, NextProtocolSelector) ->
+ case NextProtocolSelector(Protocols) of
+ Protocol when is_binary(Protocol), byte_size(Protocol) > 0 ->
+ Protocol;
+ _ ->
+ ?ALERT_REC(?FATAL, ?INTERNAL_ERROR) % we are broken internally :( api presently stops this but we might let it happen in future
+ end.
+
handle_renegotiation_info(_, #renegotiation_info{renegotiated_connection = ?byte(0)},
ConnectionStates, false, _, _) ->
{ok, ssl_record:set_renegotiation_flag(true, ConnectionStates)};
@@ -816,17 +903,21 @@ master_secret(Version, MasterSecret, #security_parameters{
ServerCipherState, Role)}.
-dec_hs(_Version, ?HELLO_REQUEST, <<>>) ->
+dec_hs(_, ?NEXT_PROTOCOL, <<?BYTE(SelectedProtocolLength), SelectedProtocol:SelectedProtocolLength/binary,
+ ?BYTE(PaddingLength), _Padding:PaddingLength/binary>>) ->
+ #next_protocol{selected_protocol = SelectedProtocol};
+
+dec_hs(_, ?HELLO_REQUEST, <<>>) ->
#hello_request{};
%% Client hello v2.
%% The server must be able to receive such messages, from clients that
%% are willing to use ssl v3 or higher, but have ssl v2 compatibility.
dec_hs(_Version, ?CLIENT_HELLO, <<?BYTE(Major), ?BYTE(Minor),
- ?UINT16(CSLength), ?UINT16(0),
- ?UINT16(CDLength),
- CipherSuites:CSLength/binary,
- ChallengeData:CDLength/binary>>) ->
+ ?UINT16(CSLength), ?UINT16(0),
+ ?UINT16(CDLength),
+ CipherSuites:CSLength/binary,
+ ChallengeData:CDLength/binary>>) ->
#client_hello{client_version = {Major, Minor},
random = ssl_ssl2:client_random(ChallengeData, CDLength),
session_id = 0,
@@ -839,20 +930,22 @@ dec_hs(_Version, ?CLIENT_HELLO, <<?BYTE(Major), ?BYTE(Minor), Random:32/binary,
?UINT16(Cs_length), CipherSuites:Cs_length/binary,
?BYTE(Cm_length), Comp_methods:Cm_length/binary,
Extensions/binary>>) ->
- HelloExtensions = dec_hello_extensions(Extensions),
- RenegotiationInfo = proplists:get_value(renegotiation_info, HelloExtensions,
- undefined),
- HashSigns = proplists:get_value(hash_signs, HelloExtensions,
- undefined),
+
+ DecodedExtensions = dec_hello_extensions(Extensions),
+ RenegotiationInfo = proplists:get_value(renegotiation_info, DecodedExtensions, undefined),
+ HashSigns = proplists:get_value(hash_signs, DecodedExtensions, undefined),
+ NextProtocolNegotiation = proplists:get_value(next_protocol_negotiation, DecodedExtensions, undefined),
+
#client_hello{
- client_version = {Major,Minor},
- random = Random,
- session_id = Session_ID,
- cipher_suites = from_2bytes(CipherSuites),
- compression_methods = Comp_methods,
- renegotiation_info = RenegotiationInfo,
- hash_signs = HashSigns
- };
+ client_version = {Major,Minor},
+ random = Random,
+ session_id = Session_ID,
+ cipher_suites = from_2bytes(CipherSuites),
+ compression_methods = Comp_methods,
+ renegotiation_info = RenegotiationInfo,
+ hash_signs = HashSigns,
+ next_protocol_negotiation = NextProtocolNegotiation
+ };
dec_hs(_Version, ?SERVER_HELLO, <<?BYTE(Major), ?BYTE(Minor), Random:32/binary,
?BYTE(SID_length), Session_ID:SID_length/binary,
@@ -868,7 +961,7 @@ dec_hs(_Version, ?SERVER_HELLO, <<?BYTE(Major), ?BYTE(Minor), Random:32/binary,
dec_hs(_Version, ?SERVER_HELLO, <<?BYTE(Major), ?BYTE(Minor), Random:32/binary,
?BYTE(SID_length), Session_ID:SID_length/binary,
- Cipher_suite:2/binary, ?BYTE(Comp_method),
+ Cipher_suite:2/binary, ?BYTE(Comp_method),
?UINT16(ExtLen), Extensions:ExtLen/binary>>) ->
HelloExtensions = dec_hello_extensions(Extensions, []),
@@ -876,6 +969,8 @@ dec_hs(_Version, ?SERVER_HELLO, <<?BYTE(Major), ?BYTE(Minor), Random:32/binary,
undefined),
HashSigns = proplists:get_value(hash_signs, HelloExtensions,
undefined),
+ NextProtocolNegotiation = proplists:get_value(next_protocol_negotiation, HelloExtensions, undefined),
+
#server_hello{
server_version = {Major,Minor},
random = Random,
@@ -883,7 +978,8 @@ dec_hs(_Version, ?SERVER_HELLO, <<?BYTE(Major), ?BYTE(Minor), Random:32/binary,
cipher_suite = Cipher_suite,
compression_method = Comp_method,
renegotiation_info = RenegotiationInfo,
- hash_signs = HashSigns};
+ hash_signs = HashSigns,
+ next_protocol_negotiation = NextProtocolNegotiation};
dec_hs(_Version, ?CERTIFICATE, <<?UINT24(ACLen), ASN1Certs:ACLen/binary>>) ->
#certificate{asn1_certificates = certs_to_list(ASN1Certs)};
@@ -959,6 +1055,9 @@ dec_hello_extensions(_) ->
dec_hello_extensions(<<>>, Acc) ->
Acc;
+dec_hello_extensions(<<?UINT16(?NEXTPROTONEG_EXT), ?UINT16(Len), ExtensionData:Len/binary, Rest/binary>>, Acc) ->
+ Prop = {next_protocol_negotiation, #next_protocol_negotiation{extension_data = ExtensionData}},
+ dec_hello_extensions(Rest, [Prop | Acc]);
dec_hello_extensions(<<?UINT16(?RENEGOTIATION_EXT), ?UINT16(Len), Info:Len/binary, Rest/binary>>, Acc) ->
RenegotiateInfo = case Len of
1 -> % Initial handshake
@@ -982,6 +1081,7 @@ dec_hello_extensions(<<?UINT16(?SIGNATURE_ALGORITHMS_EXT), ?UINT16(Len),
%% Ignore data following the ClientHello (i.e.,
%% extensions) if not understood.
+
dec_hello_extensions(<<?UINT16(_), ?UINT16(Len), _Unknown:Len/binary, Rest/binary>>, Acc) ->
dec_hello_extensions(Rest, Acc);
%% This theoretically should not happen if the protocol is followed, but if it does it is ignored.
@@ -1014,6 +1114,11 @@ certs_from_list(ACList) ->
<<?UINT24(CertLen), Cert/binary>>
end || Cert <- ACList]).
+enc_hs(#next_protocol{selected_protocol = SelectedProtocol}, _Version) ->
+ PaddingLength = 32 - ((byte_size(SelectedProtocol) + 2) rem 32),
+
+ {?NEXT_PROTOCOL, <<?BYTE((byte_size(SelectedProtocol))), SelectedProtocol/binary,
+ ?BYTE(PaddingLength), 0:(PaddingLength * 8)>>};
enc_hs(#hello_request{}, _Version) ->
{?HELLO_REQUEST, <<>>};
enc_hs(#client_hello{client_version = {Major, Minor},
@@ -1022,19 +1127,21 @@ enc_hs(#client_hello{client_version = {Major, Minor},
cipher_suites = CipherSuites,
compression_methods = CompMethods,
renegotiation_info = RenegotiationInfo,
- hash_signs = HashSigns}, _Version) ->
+ hash_signs = HashSigns,
+ next_protocol_negotiation = NextProtocolNegotiation}, _Version) ->
SIDLength = byte_size(SessionID),
BinCompMethods = list_to_binary(CompMethods),
CmLength = byte_size(BinCompMethods),
BinCipherSuites = list_to_binary(CipherSuites),
CsLength = byte_size(BinCipherSuites),
- Extensions0 = hello_extensions(RenegotiationInfo),
+ Extensions0 = hello_extensions(RenegotiationInfo, NextProtocolNegotiation),
Extensions1 = if
Major == 3, Minor >=3 -> Extensions0 ++ hello_extensions(HashSigns);
true -> Extensions0
end,
ExtensionsBin = enc_hello_extensions(Extensions1),
- {?CLIENT_HELLO, <<?BYTE(Major), ?BYTE(Minor), Random:32/binary,
+
+ {?CLIENT_HELLO, <<?BYTE(Major), ?BYTE(Minor), Random:32/binary,
?BYTE(SIDLength), SessionID/binary,
?UINT16(CsLength), BinCipherSuites/binary,
?BYTE(CmLength), BinCompMethods/binary, ExtensionsBin/binary>>};
@@ -1044,9 +1151,10 @@ enc_hs(#server_hello{server_version = {Major, Minor},
session_id = Session_ID,
cipher_suite = Cipher_suite,
compression_method = Comp_method,
- renegotiation_info = RenegotiationInfo}, _Version) ->
+ renegotiation_info = RenegotiationInfo,
+ next_protocol_negotiation = NextProtocolNegotiation}, _Version) ->
SID_length = byte_size(Session_ID),
- Extensions = hello_extensions(RenegotiationInfo),
+ Extensions = hello_extensions(RenegotiationInfo, NextProtocolNegotiation),
ExtensionsBin = enc_hello_extensions(Extensions),
{?SERVER_HELLO, <<?BYTE(Major), ?BYTE(Minor), Random:32/binary,
?BYTE(SID_length), Session_ID/binary,
@@ -1119,8 +1227,9 @@ enc_sign(_HashSign, Sign, _Version) ->
SignLen = byte_size(Sign),
<<?UINT16(SignLen), Sign/binary>>.
-hello_extensions(undefined) ->
- [];
+hello_extensions(RenegotiationInfo, NextProtocolNegotiation) ->
+ hello_extensions(RenegotiationInfo) ++ next_protocol_extension(NextProtocolNegotiation).
+
%% Renegotiation info
hello_extensions(#renegotiation_info{renegotiated_connection = undefined}) ->
[];
@@ -1129,6 +1238,11 @@ hello_extensions(#renegotiation_info{} = Info) ->
hello_extensions(#hash_sign_algos{} = Info) ->
[Info].
+next_protocol_extension(undefined) ->
+ [];
+next_protocol_extension(#next_protocol_negotiation{} = Info) ->
+ [Info].
+
enc_hello_extensions(Extensions) ->
enc_hello_extensions(Extensions, <<>>).
enc_hello_extensions([], <<>>) ->
@@ -1137,6 +1251,9 @@ enc_hello_extensions([], Acc) ->
Size = byte_size(Acc),
<<?UINT16(Size), Acc/binary>>;
+enc_hello_extensions([#next_protocol_negotiation{extension_data = ExtensionData} | Rest], Acc) ->
+ Len = byte_size(ExtensionData),
+ enc_hello_extensions(Rest, <<?UINT16(?NEXTPROTONEG_EXT), ?UINT16(Len), ExtensionData/binary, Acc/binary>>);
enc_hello_extensions([#renegotiation_info{renegotiated_connection = ?byte(0) = Info} | Rest], Acc) ->
Len = byte_size(Info),
enc_hello_extensions(Rest, <<?UINT16(?RENEGOTIATION_EXT), ?UINT16(Len), Info/binary, Acc/binary>>);
diff --git a/lib/ssl/src/ssl_handshake.hrl b/lib/ssl/src/ssl_handshake.hrl
index cc17dc2975..bd583e5d92 100644
--- a/lib/ssl/src/ssl_handshake.hrl
+++ b/lib/ssl/src/ssl_handshake.hrl
@@ -97,7 +97,8 @@
cipher_suites, % cipher_suites<2..2^16-1>
compression_methods, % compression_methods<1..2^8-1>,
renegotiation_info,
- hash_signs % supported combinations of hashes/signature algos
+ hash_signs, % supported combinations of hashes/signature algos
+ next_protocol_negotiation = undefined :: undefined | list(binary())
}).
-record(server_hello, {
@@ -107,7 +108,8 @@
cipher_suite, % cipher_suites
compression_method, % compression_method
renegotiation_info,
- hash_signs % supported combinations of hashes/signature algos
+ hash_signs, % supported combinations of hashes/signature algos
+ next_protocol_negotiation = undefined :: undefined | list(binary())
}).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -234,6 +236,18 @@
hash_sign_algos
}).
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Next Protocol Negotiation
+%% (http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-02)
+%% (http://technotes.googlecode.com/git/nextprotoneg.html)
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+-define(NEXTPROTONEG_EXT, 13172).
+-define(NEXT_PROTOCOL, 67).
+-record(next_protocol_negotiation, {extension_data}).
+
+-record(next_protocol, {selected_protocol}).
+
-endif. % -ifdef(ssl_handshake).
diff --git a/lib/ssl/src/ssl_internal.hrl b/lib/ssl/src/ssl_internal.hrl
index b8f2ae3b51..643b3fbf7d 100644
--- a/lib/ssl/src/ssl_internal.hrl
+++ b/lib/ssl/src/ssl_internal.hrl
@@ -106,7 +106,9 @@
% after which ssl_connection will
% go into hibernation
%% This option should only be set to true by inet_tls_dist
- erl_dist = false
+ erl_dist = false,
+ next_protocols_advertised = undefined :: list(binary()),
+ next_protocol_selector = undefined :: fun((list(binary())) -> binary())
}).
-record(socket_options,
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-17 10:01:50 +0000