diff options
Diffstat (limited to 'lib/ssl/src')
| -rw-r--r-- | lib/ssl/src/dtls_record.erl | 107 |
1 files changed, 75 insertions, 32 deletions
diff --git a/lib/ssl/src/dtls_record.erl b/lib/ssl/src/dtls_record.erl index ed8024d892..5387fcafa8 100644 --- a/lib/ssl/src/dtls_record.erl +++ b/lib/ssl/src/dtls_record.erl @@ -36,11 +36,12 @@ -export([decode_cipher_text/2]). %% Encoding --export([encode_plain_text/4, encode_change_cipher_spec/2]). +-export([encode_plain_text/4, encode_tls_cipher_text/5, encode_change_cipher_spec/2]). %% Protocol version handling --export([protocol_version/1, lowest_protocol_version/2, lowest_protocol_version/1, - highest_protocol_version/1, supported_protocol_versions/0, +-export([protocol_version/1, lowest_protocol_version/1, lowest_protocol_version/2, + highest_protocol_version/1, highest_protocol_version/2, + is_higher/2, supported_protocol_versions/0, is_acceptable_version/2]). %% DTLS Epoch handling @@ -263,20 +264,39 @@ lowest_protocol_version(Versions) -> %% %% Description: Highest protocol version present in a list %%-------------------------------------------------------------------- -highest_protocol_version([Ver | Vers]) -> - highest_protocol_version(Ver, Vers). +highest_protocol_version([]) -> + highest_protocol_version(); +highest_protocol_version(Versions) -> + [Ver | Vers] = Versions, + highest_list_protocol_version(Ver, Vers). -highest_protocol_version(Version, []) -> +%%-------------------------------------------------------------------- +-spec highest_protocol_version(dtls_version(), dtls_version()) -> dtls_version(). +%% +%% Description: Highest protocol version of two given versions +%%-------------------------------------------------------------------- +highest_protocol_version(Version = {M, N}, {M, O}) when N < O -> + Version; +highest_protocol_version({M, _}, + Version = {M, _}) -> Version; -highest_protocol_version(Version = {N, M}, [{N, O} | Rest]) when M < O -> - highest_protocol_version(Version, Rest); -highest_protocol_version({M, _}, [Version = {M, _} | Rest]) -> - highest_protocol_version(Version, Rest); -highest_protocol_version(Version = {M,_}, [{N,_} | Rest]) when M < N -> - highest_protocol_version(Version, Rest); -highest_protocol_version(_, [Version | Rest]) -> - highest_protocol_version(Version, Rest). +highest_protocol_version(Version = {M,_}, + {N, _}) when M < N -> + Version; +highest_protocol_version(_,Version) -> + Version. +%%-------------------------------------------------------------------- +-spec is_higher(V1 :: dtls_version(), V2::dtls_version()) -> boolean(). +%% +%% Description: Is V1 > V2 +%%-------------------------------------------------------------------- +is_higher({M, N}, {M, O}) when N < O -> + true; +is_higher({M, _}, {N, _}) when M < N -> + true; +is_higher(_, _) -> + false. %%-------------------------------------------------------------------- -spec supported_protocol_versions() -> [dtls_version()]. @@ -293,27 +313,33 @@ supported_protocol_versions() -> {ok, []} -> lists:map(Fun, supported_protocol_versions([])); {ok, Vsns} when is_list(Vsns) -> - supported_protocol_versions(Vsns); + supported_protocol_versions(lists:map(Fun, Vsns)); {ok, Vsn} -> - supported_protocol_versions([Vsn]) + supported_protocol_versions([Fun(Vsn)]) end. supported_protocol_versions([]) -> - Vsns = supported_connection_protocol_versions([]), + Vsns = case sufficient_dtlsv1_2_crypto_support() of + true -> + ?ALL_DATAGRAM_SUPPORTED_VERSIONS; + false -> + ?MIN_DATAGRAM_SUPPORTED_VERSIONS + end, application:set_env(ssl, dtls_protocol_version, Vsns), Vsns; supported_protocol_versions([_|_] = Vsns) -> - Vsns. - -%% highest_protocol_version() -> -%% highest_protocol_version(supported_protocol_versions()). - -lowest_protocol_version() -> - lowest_protocol_version(supported_protocol_versions()). - -supported_connection_protocol_versions([]) -> - ?ALL_DATAGRAM_SUPPORTED_VERSIONS. + case sufficient_dtlsv1_2_crypto_support() of + true -> + Vsns; + false -> + case Vsns -- ['dtlsv1.2'] of + [] -> + ?MIN_SUPPORTED_VERSIONS; + NewVsns -> + NewVsns + end + end. %%-------------------------------------------------------------------- -spec is_acceptable_version(dtls_version(), Supported :: [dtls_version()]) -> boolean(). @@ -411,6 +437,18 @@ set_connection_state_by_epoch(ConnectionStates0 = %%-------------------------------------------------------------------- %%% Internal functions %%-------------------------------------------------------------------- + + +lowest_list_protocol_version(Ver, []) -> + Ver; +lowest_list_protocol_version(Ver1, [Ver2 | Rest]) -> + lowest_list_protocol_version(lowest_protocol_version(Ver1, Ver2), Rest). + +highest_list_protocol_version(Ver, []) -> + Ver; +highest_list_protocol_version(Ver1, [Ver2 | Rest]) -> + highest_list_protocol_version(highest_protocol_version(Ver1, Ver2), Rest). + encode_tls_cipher_text(Type, {MajVer, MinVer}, Epoch, Seq, Fragment) -> Length = erlang:iolist_size(Fragment), [<<?BYTE(Type), ?BYTE(MajVer), ?BYTE(MinVer), ?UINT16(Epoch), @@ -424,6 +462,16 @@ calc_mac_hash(#connection_state{mac_secret = MacSecret, mac_hash(Version, MacAlg, MacSecret, NewSeq, Type, Length, Fragment). +highest_protocol_version() -> + highest_protocol_version(supported_protocol_versions()). + +lowest_protocol_version() -> + lowest_protocol_version(supported_protocol_versions()). + +sufficient_dtlsv1_2_crypto_support() -> + CryptoSupport = crypto:supports(), + proplists:get_bool(sha256, proplists:get_value(hashs, CryptoSupport)). + mac_hash(Version, MacAlg, MacSecret, SeqNo, Type, Length, Fragment) -> dtls_v1:mac_hash(Version, MacAlg, MacSecret, SeqNo, Type, Length, Fragment). @@ -431,8 +479,3 @@ mac_hash(Version, MacAlg, MacSecret, SeqNo, Type, Length, Fragment) -> calc_aad(Type, {MajVer, MinVer}, Epoch, SeqNo) -> NewSeq = (Epoch bsl 48) + SeqNo, <<NewSeq:64/integer, ?BYTE(Type), ?BYTE(MajVer), ?BYTE(MinVer)>>. - -lowest_list_protocol_version(Ver, []) -> - Ver; -lowest_list_protocol_version(Ver1, [Ver2 | Rest]) -> - lowest_list_protocol_version(lowest_protocol_version(Ver1, Ver2), Rest). |