diff options
Diffstat (limited to 'lib/ssl/src/tls_record.erl')
| -rw-r--r-- | lib/ssl/src/tls_record.erl | 62 |
1 files changed, 50 insertions, 12 deletions
diff --git a/lib/ssl/src/tls_record.erl b/lib/ssl/src/tls_record.erl index aa524f0225..9348c8bbdd 100644 --- a/lib/ssl/src/tls_record.erl +++ b/lib/ssl/src/tls_record.erl @@ -41,8 +41,9 @@ -export([encode_plain_text/4]). %% Protocol version handling --export([protocol_version/1, lowest_protocol_version/2, - highest_protocol_version/1, is_higher/2, 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/1, is_acceptable_version/2]). -export_type([tls_version/0, tls_atom_version/0]). @@ -257,6 +258,18 @@ lowest_protocol_version(Version = {M,_}, Version; lowest_protocol_version(_,Version) -> Version. + +%%-------------------------------------------------------------------- +-spec lowest_protocol_version([tls_version()]) -> tls_version(). +%% +%% Description: Lowest protocol version present in a list +%%-------------------------------------------------------------------- +lowest_protocol_version([]) -> + lowest_protocol_version(); +lowest_protocol_version(Versions) -> + [Ver | Vers] = Versions, + lowest_list_protocol_version(Ver, Vers). + %%-------------------------------------------------------------------- -spec highest_protocol_version([tls_version()]) -> tls_version(). %% @@ -266,19 +279,29 @@ highest_protocol_version([]) -> highest_protocol_version(); highest_protocol_version(Versions) -> [Ver | Vers] = Versions, - highest_protocol_version(Ver, Vers). + highest_list_protocol_version(Ver, Vers). -highest_protocol_version(Version, []) -> +%%-------------------------------------------------------------------- +-spec highest_protocol_version(tls_version(), tls_version()) -> tls_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 :: tls_version(), V2::tls_version()) -> boolean(). +%% +%% Description: Is V1 > V2 +%%-------------------------------------------------------------------- is_higher({M, N}, {M, O}) when N > O -> true; is_higher({M, _}, {N, _}) when M > N -> @@ -352,6 +375,17 @@ is_acceptable_version(_,_) -> %%-------------------------------------------------------------------- %%% 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}, Fragment) -> Length = erlang:iolist_size(Fragment), [<<?BYTE(Type), ?BYTE(MajVer), ?BYTE(MinVer), ?UINT16(Length)>>, Fragment]. @@ -370,6 +404,10 @@ mac_hash({3, N} = Version, MacAlg, MacSecret, SeqNo, Type, Length, Fragment) highest_protocol_version() -> highest_protocol_version(supported_protocol_versions()). +lowest_protocol_version() -> + lowest_protocol_version(supported_protocol_versions()). + + sufficient_tlsv1_2_crypto_support() -> CryptoSupport = crypto:supports(), proplists:get_bool(sha256, proplists:get_value(hashs, CryptoSupport)). |