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-rw-r--r--lib/ssl/src/ssl_handshake.erl115
1 files changed, 82 insertions, 33 deletions
diff --git a/lib/ssl/src/ssl_handshake.erl b/lib/ssl/src/ssl_handshake.erl
index 29a8996bd6..9142a260b1 100644
--- a/lib/ssl/src/ssl_handshake.erl
+++ b/lib/ssl/src/ssl_handshake.erl
@@ -49,13 +49,13 @@
]).
%% Cipher suites handling
--export([available_suites/2, available_suites/3, cipher_suites/2,
- select_session/10]).
+-export([available_suites/2, cipher_suites/2,
+ select_session/10, supported_ecc/1]).
%% Extensions handling
--export([client_hello_extensions/5,
+-export([client_hello_extensions/6,
handle_client_hello_extensions/8, %% Returns server hello extensions
- handle_server_hello_extensions/9
+ handle_server_hello_extensions/9, select_curve/2
]).
%% MISC
@@ -85,11 +85,11 @@ hello_request() ->
server_hello_done() ->
#server_hello_done{}.
-client_hello_extensions(Version, CipherSuites, SslOpts, ConnectionStates, Renegotiation) ->
+client_hello_extensions(Host, Version, CipherSuites, SslOpts, ConnectionStates, Renegotiation) ->
{EcPointFormats, EllipticCurves} =
case advertises_ec_ciphers(lists:map(fun ssl_cipher:suite_definition/1, CipherSuites)) of
true ->
- ecc_extensions(tls_v1, Version);
+ client_ecc_extensions(tls_v1, Version);
false ->
{undefined, undefined}
end,
@@ -104,7 +104,8 @@ client_hello_extensions(Version, CipherSuites, SslOpts, ConnectionStates, Renego
elliptic_curves = EllipticCurves,
next_protocol_negotiation =
encode_client_protocol_negotiation(SslOpts#ssl_options.next_protocol_selector,
- Renegotiation)}.
+ Renegotiation),
+ sni = sni(Host, SslOpts#ssl_options.server_name_indication)}.
%%--------------------------------------------------------------------
-spec certificate(der_cert(), db_handle(), certdb_ref(), client | server) -> #certificate{} | #alert{}.
@@ -641,7 +642,19 @@ encode_hello_extensions([#hash_sign_algos{hash_sign_algos = HashSignAlgos} | Res
ListLen = byte_size(SignAlgoList),
Len = ListLen + 2,
encode_hello_extensions(Rest, <<?UINT16(?SIGNATURE_ALGORITHMS_EXT),
- ?UINT16(Len), ?UINT16(ListLen), SignAlgoList/binary, Acc/binary>>).
+ ?UINT16(Len), ?UINT16(ListLen), SignAlgoList/binary, Acc/binary>>);
+encode_hello_extensions([#sni{hostname = Hostname} | Rest], Acc) ->
+ HostLen = length(Hostname),
+ HostnameBin = list_to_binary(Hostname),
+ % Hostname type (1 byte) + Hostname length (2 bytes) + Hostname (HostLen bytes)
+ ServerNameLength = 1 + 2 + HostLen,
+ % ServerNameListSize (2 bytes) + ServerNameLength
+ ExtLength = 2 + ServerNameLength,
+ encode_hello_extensions(Rest, <<?UINT16(?SNI_EXT), ?UINT16(ExtLength),
+ ?UINT16(ServerNameLength),
+ ?BYTE(?SNI_NAMETYPE_HOST_NAME),
+ ?UINT16(HostLen), HostnameBin/binary,
+ Acc/binary>>).
enc_server_key_exchange(Version, Params, {HashAlgo, SignAlgo},
ClientRandom, ServerRandom, PrivateKey) ->
@@ -861,22 +874,29 @@ available_suites(UserSuites, Version) ->
UserSuites
end.
-available_suites(ServerCert, UserSuites, Version) ->
- ssl_cipher:filter(ServerCert, available_suites(UserSuites, Version)).
+available_suites(ServerCert, UserSuites, Version, Curve) ->
+ ssl_cipher:filter(ServerCert, available_suites(UserSuites, Version))
+ -- unavailable_ecc_suites(Curve).
+
+unavailable_ecc_suites(no_curve) ->
+ ssl_cipher:ec_keyed_suites();
+unavailable_ecc_suites(_) ->
+ [].
cipher_suites(Suites, false) ->
[?TLS_EMPTY_RENEGOTIATION_INFO_SCSV | Suites];
cipher_suites(Suites, true) ->
Suites.
-select_session(SuggestedSessionId, CipherSuites, Compressions, Port, Session, Version,
+select_session(SuggestedSessionId, CipherSuites, Compressions, Port, #session{ecc = ECCCurve} =
+ Session, Version,
#ssl_options{ciphers = UserSuites} = SslOpts, Cache, CacheCb, Cert) ->
{SessionId, Resumed} = ssl_session:server_id(Port, SuggestedSessionId,
SslOpts, Cert,
Cache, CacheCb),
- Suites = ssl_handshake:available_suites(Cert, UserSuites, Version),
case Resumed of
undefined ->
+ Suites = available_suites(Cert, UserSuites, Version, ECCCurve),
CipherSuite = select_cipher_suite(CipherSuites, Suites),
Compression = select_compression(Compressions),
{new, Session#session{session_id = SessionId,
@@ -886,6 +906,13 @@ select_session(SuggestedSessionId, CipherSuites, Compressions, Port, Session, Ve
{resumed, Resumed}
end.
+supported_ecc(Version) ->
+ case tls_v1:ecc_curves(Version) of
+ [] ->
+ undefined;
+ Curves ->
+ #elliptic_curves{elliptic_curve_list = Curves}
+ end.
%%-------------certificate handling --------------------------------
certificate_types({KeyExchange, _, _, _})
@@ -926,9 +953,8 @@ certificate_authorities_from_db(CertDbHandle, CertDbRef) ->
handle_client_hello_extensions(RecordCB, Random,
#hello_extensions{renegotiation_info = Info,
srp = SRP,
- next_protocol_negotiation = NextProtocolNegotiation,
- ec_point_formats = EcPointFormats0,
- elliptic_curves = EllipticCurves0}, Version,
+ ec_point_formats = ECCFormat,
+ next_protocol_negotiation = NextProtocolNegotiation}, Version,
#ssl_options{secure_renegotiate = SecureRenegotation} = Opts,
#session{cipher_suite = CipherSuite, compression_method = Compression} = Session0,
ConnectionStates0, Renegotiation) ->
@@ -937,12 +963,11 @@ handle_client_hello_extensions(RecordCB, Random,
Random, CipherSuite, Compression,
ConnectionStates0, Renegotiation, SecureRenegotation),
ProtocolsToAdvertise = handle_next_protocol_extension(NextProtocolNegotiation, Renegotiation, Opts),
- {EcPointFormats, EllipticCurves} = handle_ecc_extensions(Version, EcPointFormats0, EllipticCurves0),
+
ServerHelloExtensions = #hello_extensions{
renegotiation_info = renegotiation_info(RecordCB, server,
ConnectionStates, Renegotiation),
- ec_point_formats = EcPointFormats,
- elliptic_curves = EllipticCurves,
+ ec_point_formats = server_ecc_extension(Version, ECCFormat),
next_protocol_negotiation =
encode_protocols_advertised_on_server(ProtocolsToAdvertise)
},
@@ -1069,16 +1094,17 @@ hello_extensions_list(#hello_extensions{renegotiation_info = RenegotiationInfo,
hash_signs = HashSigns,
ec_point_formats = EcPointFormats,
elliptic_curves = EllipticCurves,
- next_protocol_negotiation = NextProtocolNegotiation}) ->
+ next_protocol_negotiation = NextProtocolNegotiation,
+ sni = Sni}) ->
[Ext || Ext <- [RenegotiationInfo, SRP, HashSigns,
- EcPointFormats,EllipticCurves, NextProtocolNegotiation], Ext =/= undefined].
+ EcPointFormats, EllipticCurves, NextProtocolNegotiation, Sni], Ext =/= undefined].
srp_user(#ssl_options{srp_identity = {UserName, _}}) ->
#srp{username = UserName};
srp_user(_) ->
undefined.
-ecc_extensions(Module, Version) ->
+client_ecc_extensions(Module, Version) ->
CryptoSupport = proplists:get_value(public_keys, crypto:supports()),
case proplists:get_bool(ecdh, CryptoSupport) of
true ->
@@ -1089,15 +1115,13 @@ ecc_extensions(Module, Version) ->
{undefined, undefined}
end.
-handle_ecc_extensions(Version, EcPointFormats0, EllipticCurves0) ->
+server_ecc_extension(_Version, EcPointFormats) ->
CryptoSupport = proplists:get_value(public_keys, crypto:supports()),
case proplists:get_bool(ecdh, CryptoSupport) of
true ->
- EcPointFormats1 = handle_ecc_point_fmt_extension(EcPointFormats0),
- EllipticCurves1 = handle_ecc_curves_extension(Version, EllipticCurves0),
- {EcPointFormats1, EllipticCurves1};
- _ ->
- {undefined, undefined}
+ handle_ecc_point_fmt_extension(EcPointFormats);
+ false ->
+ undefined
end.
handle_ecc_point_fmt_extension(undefined) ->
@@ -1105,11 +1129,6 @@ handle_ecc_point_fmt_extension(undefined) ->
handle_ecc_point_fmt_extension(_) ->
#ec_point_formats{ec_point_format_list = [?ECPOINT_UNCOMPRESSED]}.
-handle_ecc_curves_extension(_Version, undefined) ->
- undefined;
-handle_ecc_curves_extension(Version, _) ->
- #elliptic_curves{elliptic_curve_list = tls_v1:ecc_curves(Version)}.
-
advertises_ec_ciphers([]) ->
false;
advertises_ec_ciphers([{ecdh_ecdsa, _,_,_} | _]) ->
@@ -1124,7 +1143,36 @@ advertises_ec_ciphers([{ecdh_anon, _,_,_} | _]) ->
true;
advertises_ec_ciphers([_| Rest]) ->
advertises_ec_ciphers(Rest).
-
+select_curve(#elliptic_curves{elliptic_curve_list = ClientCurves},
+ #elliptic_curves{elliptic_curve_list = ServerCurves}) ->
+ select_curve(ClientCurves, ServerCurves);
+select_curve(undefined, _) ->
+ %% Client did not send ECC extension use default curve if
+ %% ECC cipher is negotiated
+ {namedCurve, ?secp256k1};
+select_curve(_, []) ->
+ no_curve;
+select_curve(Curves, [Curve| Rest]) ->
+ case lists:member(Curve, Curves) of
+ true ->
+ {namedCurve, Curve};
+ false ->
+ select_curve(Curves, Rest)
+ end.
+%% RFC 6066, Section 3: Currently, the only server names supported are
+%% DNS hostnames
+sni(_, disable) ->
+ undefined;
+sni(Host, undefined) ->
+ sni1(Host);
+sni(_Host, SNIOption) ->
+ sni1(SNIOption).
+
+sni1(Hostname) ->
+ case inet_parse:domain(Hostname) of
+ false -> undefined;
+ true -> #sni{hostname = Hostname}
+ end.
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
@@ -1648,3 +1696,4 @@ advertised_hash_signs({Major, Minor}) when Major >= 3 andalso Minor >= 3 ->
({Hash, _}) -> proplists:get_bool(Hash, Hashs) end, HashSigns)};
advertised_hash_signs(_) ->
undefined.
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 08:22:34 +0000