diff options
Diffstat (limited to 'lib/ssl/src/ssl_handshake.erl')
| -rw-r--r-- | lib/ssl/src/ssl_handshake.erl | 45 |
1 files changed, 30 insertions, 15 deletions
diff --git a/lib/ssl/src/ssl_handshake.erl b/lib/ssl/src/ssl_handshake.erl index 5b51ac0916..4acc745c5f 100644 --- a/lib/ssl/src/ssl_handshake.erl +++ b/lib/ssl/src/ssl_handshake.erl @@ -70,7 +70,7 @@ %% Extensions handling -export([client_hello_extensions/6, handle_client_hello_extensions/9, %% Returns server hello extensions - handle_server_hello_extensions/9, select_curve/2 + handle_server_hello_extensions/9, select_curve/2, select_curve/3 ]). %% MISC @@ -120,11 +120,13 @@ server_hello_done() -> #server_hello_done{}. client_hello_extensions(Host, Version, CipherSuites, - #ssl_options{signature_algs = SupportedHashSigns, versions = AllVersions} = SslOpts, ConnectionStates, Renegotiation) -> + #ssl_options{signature_algs = SupportedHashSigns, + eccs = SupportedECCs, + versions = AllVersions} = SslOpts, ConnectionStates, Renegotiation) -> {EcPointFormats, EllipticCurves} = case advertises_ec_ciphers(lists:map(fun ssl_cipher:suite_definition/1, CipherSuites)) of true -> - client_ecc_extensions(tls_v1, Version); + client_ecc_extensions(SupportedECCs); false -> {undefined, undefined} end, @@ -1169,8 +1171,9 @@ select_session(SuggestedSessionId, CipherSuites, HashSigns, Compressions, Port, {resumed, Resumed} end. -supported_ecc({Major, Minor} = Version) when ((Major == 3) and (Minor >= 1)) orelse (Major > 3) -> - Curves = tls_v1:ecc_curves(Version), +%% Deprecated? +supported_ecc({Major, Minor}) when ((Major == 3) and (Minor >= 1)) orelse (Major > 3) -> + Curves = tls_v1:ecc_curves(Minor), #elliptic_curves{elliptic_curve_list = Curves}; supported_ecc(_) -> #elliptic_curves{elliptic_curve_list = []}. @@ -1454,12 +1457,12 @@ srp_user(#ssl_options{srp_identity = {UserName, _}}) -> srp_user(_) -> undefined. -client_ecc_extensions(Module, Version) -> +client_ecc_extensions(SupportedECCs) -> CryptoSupport = proplists:get_value(public_keys, crypto:supports()), case proplists:get_bool(ecdh, CryptoSupport) of true -> EcPointFormats = #ec_point_formats{ec_point_format_list = [?ECPOINT_UNCOMPRESSED]}, - EllipticCurves = #elliptic_curves{elliptic_curve_list = Module:ecc_curves(Version)}, + EllipticCurves = SupportedECCs, {EcPointFormats, EllipticCurves}; _ -> {undefined, undefined} @@ -1493,22 +1496,34 @@ 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, _) -> + +select_curve(Client, Server) -> + select_curve(Client, Server, false). + +select_curve(#elliptic_curves{elliptic_curve_list = ClientCurves}, + #elliptic_curves{elliptic_curve_list = ServerCurves}, + ServerOrder) -> + case ServerOrder of + false -> + select_shared_curve(ClientCurves, ServerCurves); + true -> + select_shared_curve(ServerCurves, ClientCurves) + end; +select_curve(undefined, _, _) -> %% Client did not send ECC extension use default curve if %% ECC cipher is negotiated - {namedCurve, ?secp256r1}; -select_curve(_, []) -> + {namedCurve, ?secp256r1}. + +select_shared_curve([], _) -> no_curve; -select_curve(Curves, [Curve| Rest]) -> +select_shared_curve([Curve | Rest], Curves) -> case lists:member(Curve, Curves) of true -> {namedCurve, Curve}; false -> - select_curve(Curves, Rest) + select_shared_curve(Rest, Curves) end. + %% RFC 6066, Section 3: Currently, the only server names supported are %% DNS hostnames sni(_, disable) -> |