%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1999-2018. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
%%
%%% Purpose : Main API module for SSL see also tls.erl and dtls.erl
-module(ssl).
-include_lib("public_key/include/public_key.hrl").
-include("ssl_internal.hrl").
-include("ssl_api.hrl").
-include("ssl_internal.hrl").
-include("ssl_record.hrl").
-include("ssl_cipher.hrl").
-include("ssl_handshake.hrl").
-include("ssl_srp.hrl").
%% Application handling
-export([start/0, start/1, stop/0, clear_pem_cache/0]).
%% Socket handling
-export([connect/3, connect/2, connect/4,
listen/2, transport_accept/1, transport_accept/2,
handshake/1, handshake/2, handshake/3, handshake_continue/2,
handshake_continue/3, handshake_cancel/1,
ssl_accept/1, ssl_accept/2, ssl_accept/3,
controlling_process/2, peername/1, peercert/1, sockname/1,
close/1, close/2, shutdown/2, recv/2, recv/3, send/2,
getopts/2, setopts/2, getstat/1, getstat/2
]).
%% SSL/TLS protocol handling
-export([cipher_suites/0, cipher_suites/1, cipher_suites/2, filter_cipher_suites/2,
prepend_cipher_suites/2, append_cipher_suites/2,
eccs/0, eccs/1, versions/0,
format_error/1, renegotiate/1, prf/5, negotiated_protocol/1,
connection_information/1, connection_information/2]).
%% Misc
-export([handle_options/2, tls_version/1, new_ssl_options/3, suite_to_str/1,
set_log_level/1]).
-deprecated({ssl_accept, 1, eventually}).
-deprecated({ssl_accept, 2, eventually}).
-deprecated({ssl_accept, 3, eventually}).
%%--------------------------------------------------------------------
-spec start() -> ok | {error, reason()}.
-spec start(permanent | transient | temporary) -> ok | {error, reason()}.
%%
%% Description: Utility function that starts the ssl and applications
%% that it depends on.
%% see application(3)
%%--------------------------------------------------------------------
start() ->
start(temporary).
start(Type) ->
case application:ensure_all_started(ssl, Type) of
{ok, _} ->
ok;
Other ->
Other
end.
%%--------------------------------------------------------------------
-spec stop() -> ok.
%%
%% Description: Stops the ssl application.
%%--------------------------------------------------------------------
stop() ->
application:stop(ssl).
%%--------------------------------------------------------------------
-spec connect(host() | port(), [connect_option()]) -> {ok, #sslsocket{}} |
{error, reason()}.
-spec connect(host() | port(), [connect_option()] | inet:port_number(),
timeout() | list()) ->
{ok, #sslsocket{}} | {error, reason()}.
-spec connect(host() | port(), inet:port_number(), list(), timeout()) ->
{ok, #sslsocket{}} | {error, reason()}.
%%
%% Description: Connect to an ssl server.
%%--------------------------------------------------------------------
connect(Socket, SslOptions) when is_port(Socket) ->
connect(Socket, SslOptions, infinity).
connect(Socket, SslOptions0, Timeout) when is_port(Socket),
(is_integer(Timeout) andalso Timeout >= 0) or (Timeout == infinity) ->
{Transport,_,_,_} = proplists:get_value(cb_info, SslOptions0,
{gen_tcp, tcp, tcp_closed, tcp_error}),
EmulatedOptions = tls_socket:emulated_options(),
{ok, SocketValues} = tls_socket:getopts(Transport, Socket, EmulatedOptions),
try handle_options(SslOptions0 ++ SocketValues, client) of
{ok, Config} ->
tls_socket:upgrade(Socket, Config, Timeout)
catch
_:{error, Reason} ->
{error, Reason}
end;
connect(Host, Port, Options) ->
connect(Host, Port, Options, infinity).
connect(Host, Port, Options, Timeout) when (is_integer(Timeout) andalso Timeout >= 0) or (Timeout == infinity) ->
try
{ok, Config} = handle_options(Options, client, Host),
case Config#config.connection_cb of
tls_connection ->
tls_socket:connect(Host,Port,Config,Timeout);
dtls_connection ->
dtls_socket:connect(Host,Port,Config,Timeout)
end
catch
throw:Error ->
Error
end.
%%--------------------------------------------------------------------
-spec listen(inet:port_number(), [listen_option()]) ->{ok, #sslsocket{}} | {error, reason()}.
%%
%% Description: Creates an ssl listen socket.
%%--------------------------------------------------------------------
listen(_Port, []) ->
{error, nooptions};
listen(Port, Options0) ->
try
{ok, Config} = handle_options(Options0, server),
do_listen(Port, Config, connection_cb(Options0))
catch
Error = {error, _} ->
Error
end.
%%--------------------------------------------------------------------
-spec transport_accept(#sslsocket{}) -> {ok, #sslsocket{}} |
{error, reason()}.
-spec transport_accept(#sslsocket{}, timeout()) -> {ok, #sslsocket{}} |
{error, reason()}.
%%
%% Description: Performs transport accept on an ssl listen socket
%%--------------------------------------------------------------------
transport_accept(ListenSocket) ->
transport_accept(ListenSocket, infinity).
transport_accept(#sslsocket{pid = {ListenSocket,
#config{connection_cb = ConnectionCb} = Config}}, Timeout)
when (is_integer(Timeout) andalso Timeout >= 0) or (Timeout == infinity) ->
case ConnectionCb of
tls_connection ->
tls_socket:accept(ListenSocket, Config, Timeout);
dtls_connection ->
dtls_socket:accept(ListenSocket, Config, Timeout)
end.
%%--------------------------------------------------------------------
-spec ssl_accept(#sslsocket{}) -> ok | {error, reason()}.
-spec ssl_accept(#sslsocket{} | port(), timeout()| [ssl_option()
| transport_option()]) ->
ok | {ok, #sslsocket{}} | {error, reason()}.
-spec ssl_accept(#sslsocket{} | port(), [ssl_option()] | [ssl_option()| transport_option()], timeout()) ->
ok | {ok, #sslsocket{}} | {error, reason()}.
%%
%% Description: Performs accept on an ssl listen socket. e.i. performs
%% ssl handshake.
%%--------------------------------------------------------------------
ssl_accept(ListenSocket) ->
ssl_accept(ListenSocket, [], infinity).
ssl_accept(Socket, Timeout) when (is_integer(Timeout) andalso Timeout >= 0) or (Timeout == infinity) ->
ssl_accept(Socket, [], Timeout);
ssl_accept(ListenSocket, SslOptions) when is_port(ListenSocket) ->
ssl_accept(ListenSocket, SslOptions, infinity);
ssl_accept(Socket, Timeout) ->
ssl_accept(Socket, [], Timeout).
ssl_accept(Socket, SslOptions, Timeout) when is_port(Socket) ->
handshake(Socket, SslOptions, Timeout);
ssl_accept(Socket, SslOptions, Timeout) ->
case handshake(Socket, SslOptions, Timeout) of
{ok, _} ->
ok;
Error ->
Error
end.
%%--------------------------------------------------------------------
-spec handshake(#sslsocket{}) -> {ok, #sslsocket{}} | {error, reason()}.
-spec handshake(#sslsocket{} | port(), timeout()| [ssl_option()
| transport_option()]) ->
{ok, #sslsocket{}} | {error, reason()}.
-spec handshake(#sslsocket{} | port(), [ssl_option()] | [ssl_option()| transport_option()], timeout()) ->
{ok, #sslsocket{}} | {error, reason()}.
%%
%% Description: Performs accept on an ssl listen socket. e.i. performs
%% ssl handshake.
%%--------------------------------------------------------------------
%% Performs the SSL/TLS/DTLS server-side handshake.
handshake(ListenSocket) ->
handshake(ListenSocket, infinity).
handshake(#sslsocket{} = Socket, Timeout) when (is_integer(Timeout) andalso Timeout >= 0) or
(Timeout == infinity) ->
ssl_connection:handshake(Socket, Timeout);
%% If Socket is a ordinary socket(): upgrades a gen_tcp, or equivalent, socket to
%% an SSL socket, that is, performs the SSL/TLS server-side handshake and returns
%% the SSL socket.
%%
%% If Socket is an sslsocket(): provides extra SSL/TLS/DTLS options to those
%% specified in ssl:listen/2 and then performs the SSL/TLS/DTLS handshake.
handshake(ListenSocket, SslOptions) when is_port(ListenSocket) ->
handshake(ListenSocket, SslOptions, infinity).
handshake(#sslsocket{} = Socket, [], Timeout) when (is_integer(Timeout) andalso Timeout >= 0) or
(Timeout == infinity)->
handshake(Socket, Timeout);
handshake(#sslsocket{fd = {_, _, _, Tracker}} = Socket, SslOpts, Timeout) when
(is_integer(Timeout) andalso Timeout >= 0) or (Timeout == infinity)->
try
{ok, EmOpts, _} = tls_socket:get_all_opts(Tracker),
ssl_connection:handshake(Socket, {SslOpts,
tls_socket:emulated_socket_options(EmOpts, #socket_options{})}, Timeout)
catch
Error = {error, _Reason} -> Error
end;
handshake(#sslsocket{pid = [Pid|_], fd = {_, _, _}} = Socket, SslOpts, Timeout) when
(is_integer(Timeout) andalso Timeout >= 0) or (Timeout == infinity)->
try
{ok, EmOpts, _} = dtls_packet_demux:get_all_opts(Pid),
ssl_connection:handshake(Socket, {SslOpts,
tls_socket:emulated_socket_options(EmOpts, #socket_options{})}, Timeout)
catch
Error = {error, _Reason} -> Error
end;
handshake(Socket, SslOptions, Timeout) when is_port(Socket),
(is_integer(Timeout) andalso Timeout >= 0) or (Timeout == infinity) ->
{Transport,_,_,_} =
proplists:get_value(cb_info, SslOptions, {gen_tcp, tcp, tcp_closed, tcp_error}),
EmulatedOptions = tls_socket:emulated_options(),
{ok, SocketValues} = tls_socket:getopts(Transport, Socket, EmulatedOptions),
ConnetionCb = connection_cb(SslOptions),
try handle_options(SslOptions ++ SocketValues, server) of
{ok, #config{transport_info = CbInfo, ssl = SslOpts, emulated = EmOpts}} ->
ok = tls_socket:setopts(Transport, Socket, tls_socket:internal_inet_values()),
{ok, Port} = tls_socket:port(Transport, Socket),
ssl_connection:handshake(ConnetionCb, Port, Socket,
{SslOpts,
tls_socket:emulated_socket_options(EmOpts, #socket_options{}), undefined},
self(), CbInfo, Timeout)
catch
Error = {error, _Reason} -> Error
end.
%%--------------------------------------------------------------------
-spec handshake_continue(#sslsocket{}, [ssl_option()]) ->
{ok, #sslsocket{}} | {error, reason()}.
%%
%%
%% Description: Continues the handshke possible with newly supplied options.
%%--------------------------------------------------------------------
handshake_continue(Socket, SSLOptions) ->
handshake_continue(Socket, SSLOptions, infinity).
%%--------------------------------------------------------------------
-spec handshake_continue(#sslsocket{}, [ssl_option()], timeout()) ->
{ok, #sslsocket{}} | {error, reason()}.
%%
%%
%% Description: Continues the handshke possible with newly supplied options.
%%--------------------------------------------------------------------
handshake_continue(Socket, SSLOptions, Timeout) ->
ssl_connection:handshake_continue(Socket, SSLOptions, Timeout).
%%--------------------------------------------------------------------
-spec handshake_cancel(#sslsocket{}) -> term().
%%
%% Description: Cancels the handshakes sending a close alert.
%%--------------------------------------------------------------------
handshake_cancel(Socket) ->
ssl_connection:handshake_cancel(Socket).
%%--------------------------------------------------------------------
-spec close(#sslsocket{}) -> term().
%%
%% Description: Close an ssl connection
%%--------------------------------------------------------------------
close(#sslsocket{pid = [Pid|_]}) when is_pid(Pid) ->
ssl_connection:close(Pid, {close, ?DEFAULT_TIMEOUT});
close(#sslsocket{pid = {dtls, #config{dtls_handler = {Pid, _}}}}) ->
dtls_packet_demux:close(Pid);
close(#sslsocket{pid = {ListenSocket, #config{transport_info={Transport,_, _, _}}}}) ->
Transport:close(ListenSocket).
%%--------------------------------------------------------------------
-spec close(#sslsocket{}, timeout() | {pid(), integer()}) -> term().
%%
%% Description: Close an ssl connection
%%--------------------------------------------------------------------
close(#sslsocket{pid = [TLSPid|_]},
{Pid, Timeout} = DownGrade) when is_pid(TLSPid),
is_pid(Pid),
(is_integer(Timeout) andalso Timeout >= 0) or (Timeout == infinity) ->
ssl_connection:close(TLSPid, {close, DownGrade});
close(#sslsocket{pid = [TLSPid|_]}, Timeout) when is_pid(TLSPid),
(is_integer(Timeout) andalso Timeout >= 0) or (Timeout == infinity) ->
ssl_connection:close(TLSPid, {close, Timeout});
close(#sslsocket{pid = {ListenSocket, #config{transport_info={Transport,_, _, _}}}}, _) ->
Transport:close(ListenSocket).
%%--------------------------------------------------------------------
-spec send(#sslsocket{}, iodata()) -> ok | {error, reason()}.
%%
%% Description: Sends data over the ssl connection
%%--------------------------------------------------------------------
send(#sslsocket{pid = [Pid]}, Data) when is_pid(Pid) ->
ssl_connection:send(Pid, Data);
send(#sslsocket{pid = [_, Pid]}, Data) when is_pid(Pid) ->
tls_sender:send_data(Pid, erlang:iolist_to_binary(Data));
send(#sslsocket{pid = {_, #config{transport_info={_, udp, _, _}}}}, _) ->
{error,enotconn}; %% Emulate connection behaviour
send(#sslsocket{pid = {dtls,_}}, _) ->
{error,enotconn}; %% Emulate connection behaviour
send(#sslsocket{pid = {ListenSocket, #config{transport_info={Transport, _, _, _}}}}, Data) ->
Transport:send(ListenSocket, Data). %% {error,enotconn}
%%--------------------------------------------------------------------
-spec recv(#sslsocket{}, integer()) -> {ok, binary()| list()} | {error, reason()}.
-spec recv(#sslsocket{}, integer(), timeout()) -> {ok, binary()| list()} | {error, reason()}.
%%
%% Description: Receives data when active = false
%%--------------------------------------------------------------------
recv(Socket, Length) ->
recv(Socket, Length, infinity).
recv(#sslsocket{pid = [Pid|_]}, Length, Timeout) when is_pid(Pid),
(is_integer(Timeout) andalso Timeout >= 0) or (Timeout == infinity)->
ssl_connection:recv(Pid, Length, Timeout);
recv(#sslsocket{pid = {dtls,_}}, _, _) ->
{error,enotconn};
recv(#sslsocket{pid = {Listen,
#config{transport_info = {Transport, _, _, _}}}}, _,_) when is_port(Listen)->
Transport:recv(Listen, 0). %% {error,enotconn}
%%--------------------------------------------------------------------
-spec controlling_process(#sslsocket{}, pid()) -> ok | {error, reason()}.
%%
%% Description: Changes process that receives the messages when active = true
%% or once.
%%--------------------------------------------------------------------
controlling_process(#sslsocket{pid = [Pid|_]}, NewOwner) when is_pid(Pid), is_pid(NewOwner) ->
ssl_connection:new_user(Pid, NewOwner);
controlling_process(#sslsocket{pid = {dtls, _}},
NewOwner) when is_pid(NewOwner) ->
ok; %% Meaningless but let it be allowed to conform with TLS
controlling_process(#sslsocket{pid = {Listen,
#config{transport_info = {Transport, _, _, _}}}},
NewOwner) when is_port(Listen),
is_pid(NewOwner) ->
%% Meaningless but let it be allowed to conform with normal sockets
Transport:controlling_process(Listen, NewOwner).
%%--------------------------------------------------------------------
-spec connection_information(#sslsocket{}) -> {ok, list()} | {error, reason()}.
%%
%% Description: Return SSL information for the connection
%%--------------------------------------------------------------------
connection_information(#sslsocket{pid = [Pid|_]}) when is_pid(Pid) ->
case ssl_connection:connection_information(Pid, false) of
{ok, Info} ->
{ok, [Item || Item = {_Key, Value} <- Info, Value =/= undefined]};
Error ->
Error
end;
connection_information(#sslsocket{pid = {Listen, _}}) when is_port(Listen) ->
{error, enotconn};
connection_information(#sslsocket{pid = {dtls,_}}) ->
{error,enotconn}.
%%--------------------------------------------------------------------
-spec connection_information(#sslsocket{}, [atom()]) -> {ok, list()} | {error, reason()}.
%%
%% Description: Return SSL information for the connection
%%--------------------------------------------------------------------
connection_information(#sslsocket{pid = [Pid|_]}, Items) when is_pid(Pid) ->
case ssl_connection:connection_information(Pid, include_security_info(Items)) of
{ok, Info} ->
{ok, [Item || Item = {Key, Value} <- Info, lists:member(Key, Items),
Value =/= undefined]};
Error ->
Error
end.
%%--------------------------------------------------------------------
-spec peername(#sslsocket{}) -> {ok, {inet:ip_address(), inet:port_number()}} | {error, reason()}.
%%
%% Description: same as inet:peername/1.
%%--------------------------------------------------------------------
peername(#sslsocket{pid = [Pid|_], fd = {Transport, Socket, _}}) when is_pid(Pid)->
dtls_socket:peername(Transport, Socket);
peername(#sslsocket{pid = [Pid|_], fd = {Transport, Socket, _, _}}) when is_pid(Pid)->
tls_socket:peername(Transport, Socket);
peername(#sslsocket{pid = {dtls, #config{dtls_handler = {_Pid, _}}}}) ->
dtls_socket:peername(dtls, undefined);
peername(#sslsocket{pid = {ListenSocket, #config{transport_info = {Transport,_,_,_}}}}) ->
tls_socket:peername(Transport, ListenSocket); %% Will return {error, enotconn}
peername(#sslsocket{pid = {dtls,_}}) ->
{error,enotconn}.
%%--------------------------------------------------------------------
-spec peercert(#sslsocket{}) ->{ok, DerCert::binary()} | {error, reason()}.
%%
%% Description: Returns the peercert.
%%--------------------------------------------------------------------
peercert(#sslsocket{pid = [Pid|_]}) when is_pid(Pid) ->
case ssl_connection:peer_certificate(Pid) of
{ok, undefined} ->
{error, no_peercert};
Result ->
Result
end;
peercert(#sslsocket{pid = {dtls, _}}) ->
{error, enotconn};
peercert(#sslsocket{pid = {Listen, _}}) when is_port(Listen) ->
{error, enotconn}.
%%--------------------------------------------------------------------
-spec negotiated_protocol(#sslsocket{}) -> {ok, binary()} | {error, reason()}.
%%
%% Description: Returns the protocol that has been negotiated. If no
%% protocol has been negotiated will return {error, protocol_not_negotiated}
%%--------------------------------------------------------------------
negotiated_protocol(#sslsocket{pid = [Pid|_]}) when is_pid(Pid) ->
ssl_connection:negotiated_protocol(Pid).
%%--------------------------------------------------------------------
-spec cipher_suites() -> [ssl_cipher_format:old_erl_cipher_suite()] | [string()].
%%--------------------------------------------------------------------
cipher_suites() ->
cipher_suites(erlang).
%%--------------------------------------------------------------------
-spec cipher_suites(erlang | openssl | all) ->
[ssl_cipher_format:old_erl_cipher_suite() | string()].
%% Description: Returns all supported cipher suites.
%%--------------------------------------------------------------------
cipher_suites(erlang) ->
[ssl_cipher_format:erl_suite_definition(Suite) || Suite <- available_suites(default)];
cipher_suites(openssl) ->
[ssl_cipher_format:openssl_suite_name(Suite) ||
Suite <- available_suites(default)];
cipher_suites(all) ->
[ssl_cipher_format:erl_suite_definition(Suite) || Suite <- available_suites(all)].
%%--------------------------------------------------------------------
-spec cipher_suites(default | all | anonymous, tls_record:tls_version() | dtls_record:dtls_version() |
tls_record:tls_atom_version() | dtls_record:dtls_atom_version()) ->
[ssl_cipher_format:erl_cipher_suite()].
%% Description: Returns all default and all supported cipher suites for a
%% TLS/DTLS version
%%--------------------------------------------------------------------
cipher_suites(Base, Version) when Version == 'tlsv1.2';
Version == 'tlsv1.1';
Version == tlsv1;
Version == sslv3 ->
cipher_suites(Base, tls_record:protocol_version(Version));
cipher_suites(Base, Version) when Version == 'dtlsv1.2';
Version == 'dtlsv1'->
cipher_suites(Base, dtls_record:protocol_version(Version));
cipher_suites(Base, Version) ->
[ssl_cipher_format:suite_definition(Suite) || Suite <- supported_suites(Base, Version)].
%%--------------------------------------------------------------------
-spec filter_cipher_suites([ssl_cipher_format:erl_cipher_suite()] | [ssl_cipher_format:cipher_suite()],
[{key_exchange | cipher | mac | prf, fun()}] | []) ->
[ssl_cipher_format:erl_cipher_suite() ] | [ssl_cipher_format:cipher_suite()].
%% Description: Removes cipher suites if any of the filter functions returns false
%% for any part of the cipher suite. This function also calls default filter functions
%% to make sure the cipher suite are supported by crypto.
%%--------------------------------------------------------------------
filter_cipher_suites(Suites, Filters0) ->
#{key_exchange_filters := KexF,
cipher_filters := CipherF,
mac_filters := MacF,
prf_filters := PrfF}
= ssl_cipher:crypto_support_filters(),
Filters = #{key_exchange_filters => add_filter(proplists:get_value(key_exchange, Filters0), KexF),
cipher_filters => add_filter(proplists:get_value(cipher, Filters0), CipherF),
mac_filters => add_filter(proplists:get_value(mac, Filters0), MacF),
prf_filters => add_filter(proplists:get_value(prf, Filters0), PrfF)},
ssl_cipher:filter_suites(Suites, Filters).
%%--------------------------------------------------------------------
-spec prepend_cipher_suites([ssl_cipher_format:erl_cipher_suite()] |
[{key_exchange | cipher | mac | prf, fun()}],
[ssl_cipher_format:erl_cipher_suite()]) ->
[ssl_cipher_format:erl_cipher_suite()].
%% Description: Make <Preferred> suites become the most prefered
%% suites that is put them at the head of the cipher suite list
%% and remove them from <Suites> if present. <Preferred> may be a
%% list of cipher suits or a list of filters in which case the
%% filters are use on Suites to extract the the preferred
%% cipher list.
%% --------------------------------------------------------------------
prepend_cipher_suites([First | _] = Preferred, Suites0) when is_map(First) ->
Suites = Preferred ++ (Suites0 -- Preferred),
Suites;
prepend_cipher_suites(Filters, Suites) ->
Preferred = filter_cipher_suites(Suites, Filters),
Preferred ++ (Suites -- Preferred).
%%--------------------------------------------------------------------
-spec append_cipher_suites(Deferred :: [ssl_cipher_format:erl_cipher_suite()] |
[{key_exchange | cipher | mac | prf, fun()}],
[ssl_cipher_format:erl_cipher_suite()]) ->
[ssl_cipher_format:erl_cipher_suite()].
%% Description: Make <Deferred> suites suites become the
%% least prefered suites that is put them at the end of the cipher suite list
%% and removed them from <Suites> if present.
%%
%%--------------------------------------------------------------------
append_cipher_suites([First | _] = Deferred, Suites0) when is_map(First)->
Suites = (Suites0 -- Deferred) ++ Deferred,
Suites;
append_cipher_suites(Filters, Suites) ->
Deferred = filter_cipher_suites(Suites, Filters),
(Suites -- Deferred) ++ Deferred.
%%--------------------------------------------------------------------
-spec eccs() -> tls_v1:curves().
%% Description: returns all supported curves across all versions
%%--------------------------------------------------------------------
eccs() ->
Curves = tls_v1:ecc_curves(all), % only tls_v1 has named curves right now
eccs_filter_supported(Curves).
%%--------------------------------------------------------------------
-spec eccs(tls_record:tls_version() | tls_record:tls_atom_version() |
dtls_record:dtls_version() | dtls_record:dtls_atom_version()) ->
tls_v1:curves().
%% Description: returns the curves supported for a given version of
%% ssl/tls.
%%--------------------------------------------------------------------
eccs({3,0}) ->
[];
eccs({3,_}) ->
Curves = tls_v1:ecc_curves(all),
eccs_filter_supported(Curves);
eccs({254,_} = Version) ->
eccs(dtls_v1:corresponding_tls_version(Version));
eccs(Version) when Version == 'tlsv1.2';
Version == 'tlsv1.1';
Version == tlsv1;
Version == sslv3 ->
eccs(tls_record:protocol_version(Version));
eccs(Version) when Version == 'dtlsv1.2';
Version == 'dtlsv1'->
eccs(dtls_v1:corresponding_tls_version(dtls_record:protocol_version(Version))).
eccs_filter_supported(Curves) ->
CryptoCurves = crypto:ec_curves(),
lists:filter(fun(Curve) -> proplists:get_bool(Curve, CryptoCurves) end,
Curves).
%%--------------------------------------------------------------------
-spec getopts(#sslsocket{}, [gen_tcp:option_name()]) ->
{ok, [gen_tcp:option()]} | {error, reason()}.
%%
%% Description: Gets options
%%--------------------------------------------------------------------
getopts(#sslsocket{pid = [Pid|_]}, OptionTags) when is_pid(Pid), is_list(OptionTags) ->
ssl_connection:get_opts(Pid, OptionTags);
getopts(#sslsocket{pid = {dtls, #config{transport_info = {Transport,_,_,_}}}} = ListenSocket, OptionTags) when is_list(OptionTags) ->
try dtls_socket:getopts(Transport, ListenSocket, OptionTags) of
{ok, _} = Result ->
Result;
{error, InetError} ->
{error, {options, {socket_options, OptionTags, InetError}}}
catch
_:Error ->
{error, {options, {socket_options, OptionTags, Error}}}
end;
getopts(#sslsocket{pid = {_, #config{transport_info = {Transport,_,_,_}}}} = ListenSocket,
OptionTags) when is_list(OptionTags) ->
try tls_socket:getopts(Transport, ListenSocket, OptionTags) of
{ok, _} = Result ->
Result;
{error, InetError} ->
{error, {options, {socket_options, OptionTags, InetError}}}
catch
_:Error ->
{error, {options, {socket_options, OptionTags, Error}}}
end;
getopts(#sslsocket{}, OptionTags) ->
{error, {options, {socket_options, OptionTags}}}.
%%--------------------------------------------------------------------
-spec setopts(#sslsocket{}, [gen_tcp:option()]) -> ok | {error, reason()}.
%%
%% Description: Sets options
%%--------------------------------------------------------------------
setopts(#sslsocket{pid = [Pid, Sender]}, Options0) when is_pid(Pid), is_list(Options0) ->
try proplists:expand([{binary, [{mode, binary}]},
{list, [{mode, list}]}], Options0) of
Options ->
case proplists:get_value(packet, Options, undefined) of
undefined ->
ssl_connection:set_opts(Pid, Options);
PacketOpt ->
case tls_sender:setopts(Sender, [{packet, PacketOpt}]) of
ok ->
ssl_connection:set_opts(Pid, Options);
Error ->
Error
end
end
catch
_:_ ->
{error, {options, {not_a_proplist, Options0}}}
end;
setopts(#sslsocket{pid = [Pid|_]}, Options0) when is_pid(Pid), is_list(Options0) ->
try proplists:expand([{binary, [{mode, binary}]},
{list, [{mode, list}]}], Options0) of
Options ->
ssl_connection:set_opts(Pid, Options)
catch
_:_ ->
{error, {options, {not_a_proplist, Options0}}}
end;
setopts(#sslsocket{pid = {dtls, #config{transport_info = {Transport,_,_,_}}}} = ListenSocket, Options) when is_list(Options) ->
try dtls_socket:setopts(Transport, ListenSocket, Options) of
ok ->
ok;
{error, InetError} ->
{error, {options, {socket_options, Options, InetError}}}
catch
_:Error ->
{error, {options, {socket_options, Options, Error}}}
end;
setopts(#sslsocket{pid = {_, #config{transport_info = {Transport,_,_,_}}}} = ListenSocket, Options) when is_list(Options) ->
try tls_socket:setopts(Transport, ListenSocket, Options) of
ok ->
ok;
{error, InetError} ->
{error, {options, {socket_options, Options, InetError}}}
catch
_:Error ->
{error, {options, {socket_options, Options, Error}}}
end;
setopts(#sslsocket{}, Options) ->
{error, {options,{not_a_proplist, Options}}}.
%%---------------------------------------------------------------
-spec getstat(Socket) ->
{ok, OptionValues} | {error, inet:posix()} when
Socket :: #sslsocket{},
OptionValues :: [{inet:stat_option(), integer()}].
%%
%% Description: Get all statistic options for a socket.
%%--------------------------------------------------------------------
getstat(Socket) ->
getstat(Socket, inet:stats()).
%%---------------------------------------------------------------
-spec getstat(Socket, Options) ->
{ok, OptionValues} | {error, inet:posix()} when
Socket :: #sslsocket{},
Options :: [inet:stat_option()],
OptionValues :: [{inet:stat_option(), integer()}].
%%
%% Description: Get one or more statistic options for a socket.
%%--------------------------------------------------------------------
getstat(#sslsocket{pid = {Listen, #config{transport_info = {Transport, _, _, _}}}}, Options) when is_port(Listen), is_list(Options) ->
tls_socket:getstat(Transport, Listen, Options);
getstat(#sslsocket{pid = [Pid|_], fd = {Transport, Socket, _, _}}, Options) when is_pid(Pid), is_list(Options) ->
tls_socket:getstat(Transport, Socket, Options).
%%---------------------------------------------------------------
-spec shutdown(#sslsocket{}, read | write | read_write) -> ok | {error, reason()}.
%%
%% Description: Same as gen_tcp:shutdown/2
%%--------------------------------------------------------------------
shutdown(#sslsocket{pid = {Listen, #config{transport_info = {Transport,_, _, _}}}},
How) when is_port(Listen) ->
Transport:shutdown(Listen, How);
shutdown(#sslsocket{pid = {dtls,_}},_) ->
{error, enotconn};
shutdown(#sslsocket{pid = [Pid|_]}, How) when is_pid(Pid) ->
ssl_connection:shutdown(Pid, How).
%%--------------------------------------------------------------------
-spec sockname(#sslsocket{}) -> {ok, {inet:ip_address(), inet:port_number()}} | {error, reason()}.
%%
%% Description: Same as inet:sockname/1
%%--------------------------------------------------------------------
sockname(#sslsocket{pid = {Listen, #config{transport_info = {Transport, _, _, _}}}}) when is_port(Listen) ->
tls_socket:sockname(Transport, Listen);
sockname(#sslsocket{pid = {dtls, #config{dtls_handler = {Pid, _}}}}) ->
dtls_packet_demux:sockname(Pid);
sockname(#sslsocket{pid = [Pid|_], fd = {Transport, Socket, _}}) when is_pid(Pid) ->
dtls_socket:sockname(Transport, Socket);
sockname(#sslsocket{pid = [Pid| _], fd = {Transport, Socket, _, _}}) when is_pid(Pid) ->
tls_socket:sockname(Transport, Socket).
%%---------------------------------------------------------------
-spec versions() -> [{ssl_app, string()} | {supported, [tls_record:tls_atom_version()]} |
{supported_dtls, [dtls_record:dtls_atom_version()]} |
{available, [tls_record:tls_atom_version()]} |
{available_dtls, [dtls_record:dtls_atom_version()]}].
%%
%% Description: Returns a list of relevant versions.
%%--------------------------------------------------------------------
versions() ->
TLSVsns = tls_record:supported_protocol_versions(),
DTLSVsns = dtls_record:supported_protocol_versions(),
SupportedTLSVsns = [tls_record:protocol_version(Vsn) || Vsn <- TLSVsns],
SupportedDTLSVsns = [dtls_record:protocol_version(Vsn) || Vsn <- DTLSVsns],
AvailableTLSVsns = ?ALL_AVAILABLE_VERSIONS,
AvailableDTLSVsns = ?ALL_AVAILABLE_DATAGRAM_VERSIONS,
[{ssl_app, ?VSN}, {supported, SupportedTLSVsns},
{supported_dtls, SupportedDTLSVsns},
{available, AvailableTLSVsns},
{available_dtls, AvailableDTLSVsns}].
%%---------------------------------------------------------------
-spec renegotiate(#sslsocket{}) -> ok | {error, reason()}.
%%
%% Description: Initiates a renegotiation.
%%--------------------------------------------------------------------
renegotiate(#sslsocket{pid = [Pid, Sender |_]}) when is_pid(Pid),
is_pid(Sender) ->
case tls_sender:renegotiate(Sender) of
{ok, Write} ->
tls_connection:renegotiation(Pid, Write);
Error ->
Error
end;
renegotiate(#sslsocket{pid = [Pid |_]}) when is_pid(Pid) ->
ssl_connection:renegotiation(Pid);
renegotiate(#sslsocket{pid = {dtls,_}}) ->
{error, enotconn};
renegotiate(#sslsocket{pid = {Listen,_}}) when is_port(Listen) ->
{error, enotconn}.
%%--------------------------------------------------------------------
-spec prf(#sslsocket{}, binary() | 'master_secret', binary(),
[binary() | prf_random()], non_neg_integer()) ->
{ok, binary()} | {error, reason()}.
%%
%% Description: use a ssl sessions TLS PRF to generate key material
%%--------------------------------------------------------------------
prf(#sslsocket{pid = [Pid|_]},
Secret, Label, Seed, WantedLength) when is_pid(Pid) ->
ssl_connection:prf(Pid, Secret, Label, Seed, WantedLength);
prf(#sslsocket{pid = {dtls,_}}, _,_,_,_) ->
{error, enotconn};
prf(#sslsocket{pid = {Listen,_}}, _,_,_,_) when is_port(Listen) ->
{error, enotconn}.
%%--------------------------------------------------------------------
-spec clear_pem_cache() -> ok.
%%
%% Description: Clear the PEM cache
%%--------------------------------------------------------------------
clear_pem_cache() ->
ssl_pem_cache:clear().
%%---------------------------------------------------------------
-spec format_error({error, term()}) -> list().
%%
%% Description: Creates error string.
%%--------------------------------------------------------------------
format_error({error, Reason}) ->
format_error(Reason);
format_error(Reason) when is_list(Reason) ->
Reason;
format_error(closed) ->
"TLS connection is closed";
format_error({tls_alert, Description}) ->
"TLS Alert: " ++ Description;
format_error({options,{FileType, File, Reason}}) when FileType == cacertfile;
FileType == certfile;
FileType == keyfile;
FileType == dhfile ->
Error = file_error_format(Reason),
file_desc(FileType) ++ File ++ ": " ++ Error;
format_error({options, {socket_options, Option, Error}}) ->
lists:flatten(io_lib:format("Invalid transport socket option ~p: ~s", [Option, format_error(Error)]));
format_error({options, {socket_options, Option}}) ->
lists:flatten(io_lib:format("Invalid socket option: ~p", [Option]));
format_error({options, Options}) ->
lists:flatten(io_lib:format("Invalid TLS option: ~p", [Options]));
format_error(Error) ->
case inet:format_error(Error) of
"unknown POSIX" ++ _ ->
unexpected_format(Error);
Other ->
Other
end.
tls_version({3, _} = Version) ->
Version;
tls_version({254, _} = Version) ->
dtls_v1:corresponding_tls_version(Version).
%%--------------------------------------------------------------------
-spec suite_to_str(ssl_cipher_format:erl_cipher_suite()) -> string().
%%
%% Description: Return the string representation of a cipher suite.
%%--------------------------------------------------------------------
suite_to_str(Cipher) ->
ssl_cipher_format:suite_to_str(Cipher).
%%--------------------------------------------------------------------
-spec set_log_level(atom()) -> ok | {error, term()}.
%%
%% Description: Set log level for the SSL application
%%--------------------------------------------------------------------
set_log_level(Level) ->
case application:get_all_key(ssl) of
{ok, PropList} ->
Modules = proplists:get_value(modules, PropList),
set_module_level(Modules, Level);
undefined ->
{error, ssl_not_started}
end.
set_module_level(Modules, Level) ->
Fun = fun (Module) ->
ok = logger:set_module_level(Module, Level)
end,
try lists:map(Fun, Modules) of
_ ->
ok
catch
error:{badmatch, Error} ->
Error
end.
%%%--------------------------------------------------------------
%%% Internal functions
%%%--------------------------------------------------------------------
%% Possible filters out suites not supported by crypto
available_suites(default) ->
Version = tls_record:highest_protocol_version([]),
ssl_cipher:filter_suites(ssl_cipher:suites(Version));
available_suites(all) ->
Version = tls_record:highest_protocol_version([]),
ssl_cipher:filter_suites(ssl_cipher:all_suites(Version)).
supported_suites(default, Version) ->
ssl_cipher:suites(Version);
supported_suites(all, Version) ->
ssl_cipher:all_suites(Version);
supported_suites(anonymous, Version) ->
ssl_cipher:anonymous_suites(Version).
do_listen(Port, #config{transport_info = {Transport, _, _, _}} = Config, tls_connection) ->
tls_socket:listen(Transport, Port, Config);
do_listen(Port, Config, dtls_connection) ->
dtls_socket:listen(Port, Config).
%% Handle extra ssl options given to ssl_accept
-spec handle_options([any()], #ssl_options{}) -> #ssl_options{}
; ([any()], client | server) -> {ok, #config{}}.
handle_options(Opts, Role) ->
handle_options(Opts, Role, undefined).
handle_options(Opts0, #ssl_options{protocol = Protocol, cacerts = CaCerts0,
cacertfile = CaCertFile0} = InheritedSslOpts, _) ->
RecordCB = record_cb(Protocol),
CaCerts = handle_option(cacerts, Opts0, CaCerts0),
{Verify, FailIfNoPeerCert, CaCertDefault, VerifyFun, PartialChainHanlder,
VerifyClientOnce} = handle_verify_options(Opts0, CaCerts),
CaCertFile = case proplists:get_value(cacertfile, Opts0, CaCertFile0) of
undefined ->
CaCertDefault;
CAFile ->
CAFile
end,
NewVerifyOpts = InheritedSslOpts#ssl_options{cacerts = CaCerts,
cacertfile = CaCertFile,
verify = Verify,
verify_fun = VerifyFun,
partial_chain = PartialChainHanlder,
fail_if_no_peer_cert = FailIfNoPeerCert,
verify_client_once = VerifyClientOnce},
SslOpts1 = lists:foldl(fun(Key, PropList) ->
proplists:delete(Key, PropList)
end, Opts0, [cacerts, cacertfile, verify, verify_fun, partial_chain,
fail_if_no_peer_cert, verify_client_once]),
case handle_option(versions, SslOpts1, []) of
[] ->
new_ssl_options(SslOpts1, NewVerifyOpts, RecordCB);
Value ->
Versions0 = [RecordCB:protocol_version(Vsn) || Vsn <- Value],
Versions1 = lists:sort(fun RecordCB:is_higher/2, Versions0),
new_ssl_options(proplists:delete(versions, SslOpts1),
NewVerifyOpts#ssl_options{versions = Versions1}, record_cb(Protocol))
end;
%% Handle all options in listen and connect
handle_options(Opts0, Role, Host) ->
Opts = proplists:expand([{binary, [{mode, binary}]},
{list, [{mode, list}]}], Opts0),
assert_proplist(Opts),
RecordCb = record_cb(Opts),
ReuseSessionFun = fun(_, _, _, _) -> true end,
CaCerts = handle_option(cacerts, Opts, undefined),
{Verify, FailIfNoPeerCert, CaCertDefault, VerifyFun, PartialChainHanlder, VerifyClientOnce} =
handle_verify_options(Opts, CaCerts),
CertFile = handle_option(certfile, Opts, <<>>),
RecordCb = record_cb(Opts),
[HighestVersion|_] = Versions =
case handle_option(versions, Opts, []) of
[] ->
RecordCb:supported_protocol_versions();
Vsns ->
Versions0 = [RecordCb:protocol_version(Vsn) || Vsn <- Vsns],
lists:sort(fun RecordCb:is_higher/2, Versions0)
end,
Protocol = handle_option(protocol, Opts, tls),
case Versions of
[{3, 0}] ->
reject_alpn_next_prot_options(Opts);
_ ->
ok
end,
SSLOptions0 = #ssl_options{
versions = Versions,
verify = validate_option(verify, Verify),
verify_fun = VerifyFun,
partial_chain = PartialChainHanlder,
fail_if_no_peer_cert = FailIfNoPeerCert,
verify_client_once = VerifyClientOnce,
depth = handle_option(depth, Opts, 1),
cert = handle_option(cert, Opts, undefined),
certfile = CertFile,
key = handle_option(key, Opts, undefined),
keyfile = handle_option(keyfile, Opts, CertFile),
password = handle_option(password, Opts, ""),
cacerts = CaCerts,
cacertfile = handle_option(cacertfile, Opts, CaCertDefault),
dh = handle_option(dh, Opts, undefined),
dhfile = handle_option(dhfile, Opts, undefined),
user_lookup_fun = handle_option(user_lookup_fun, Opts, undefined),
psk_identity = handle_option(psk_identity, Opts, undefined),
srp_identity = handle_option(srp_identity, Opts, undefined),
ciphers = handle_cipher_option(proplists:get_value(ciphers, Opts, []),
HighestVersion),
eccs = handle_eccs_option(proplists:get_value(eccs, Opts, eccs()),
HighestVersion),
signature_algs =
handle_hashsigns_option(
proplists:get_value(
signature_algs,
Opts,
default_option_role(server,
tls_v1:default_signature_algs(HighestVersion),
Role)),
tls_version(HighestVersion)),
signature_algs_cert =
handle_signature_algorithms_option(
proplists:get_value(
signature_algs_cert,
Opts,
undefined), %% Do not send by default
tls_version(HighestVersion)),
%% Server side option
reuse_session = handle_option(reuse_session, Opts, ReuseSessionFun),
reuse_sessions = handle_option(reuse_sessions, Opts, true),
secure_renegotiate = handle_option(secure_renegotiate, Opts, true),
client_renegotiation = handle_option(client_renegotiation, Opts,
default_option_role(server, true, Role),
server, Role),
renegotiate_at = handle_option(renegotiate_at, Opts, ?DEFAULT_RENEGOTIATE_AT),
hibernate_after = handle_option(hibernate_after, Opts, infinity),
erl_dist = handle_option(erl_dist, Opts, false),
alpn_advertised_protocols =
handle_option(alpn_advertised_protocols, Opts, undefined),
alpn_preferred_protocols =
handle_option(alpn_preferred_protocols, Opts, undefined),
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)),
server_name_indication = handle_option(server_name_indication, Opts,
default_option_role(client,
server_name_indication_default(Host), Role)),
sni_hosts = handle_option(sni_hosts, Opts, []),
sni_fun = handle_option(sni_fun, Opts, undefined),
honor_cipher_order = handle_option(honor_cipher_order, Opts,
default_option_role(server, false, Role),
server, Role),
honor_ecc_order = handle_option(honor_ecc_order, Opts,
default_option_role(server, false, Role),
server, Role),
protocol = Protocol,
padding_check = proplists:get_value(padding_check, Opts, true),
beast_mitigation = handle_option(beast_mitigation, Opts, one_n_minus_one),
fallback = handle_option(fallback, Opts,
proplists:get_value(fallback, Opts,
default_option_role(client,
false, Role)),
client, Role),
crl_check = handle_option(crl_check, Opts, false),
crl_cache = handle_option(crl_cache, Opts, {ssl_crl_cache, {internal, []}}),
max_handshake_size = handle_option(max_handshake_size, Opts, ?DEFAULT_MAX_HANDSHAKE_SIZE),
handshake = handle_option(handshake, Opts, full),
customize_hostname_check = handle_option(customize_hostname_check, Opts, [])
},
LogLevel = handle_option(log_alert, Opts, true),
SSLOptions = SSLOptions0#ssl_options{
log_level = handle_option(log_level, Opts, LogLevel)
},
CbInfo = proplists:get_value(cb_info, Opts, default_cb_info(Protocol)),
SslOptions = [protocol, versions, verify, verify_fun, partial_chain,
fail_if_no_peer_cert, verify_client_once,
depth, cert, certfile, key, keyfile,
password, cacerts, cacertfile, dh, dhfile,
user_lookup_fun, psk_identity, srp_identity, ciphers,
reuse_session, reuse_sessions, ssl_imp, client_renegotiation,
cb_info, renegotiate_at, secure_renegotiate, hibernate_after,
erl_dist, alpn_advertised_protocols, sni_hosts, sni_fun,
alpn_preferred_protocols, next_protocols_advertised,
client_preferred_next_protocols, log_alert, log_level,
server_name_indication, honor_cipher_order, padding_check, crl_check, crl_cache,
fallback, signature_algs, signature_algs_cert, eccs, honor_ecc_order,
beast_mitigation, max_handshake_size, handshake, customize_hostname_check],
SockOpts = lists:foldl(fun(Key, PropList) ->
proplists:delete(Key, PropList)
end, Opts, SslOptions),
{Sock, Emulated} = emulated_options(Protocol, SockOpts),
ConnetionCb = connection_cb(Opts),
{ok, #config{ssl = SSLOptions, emulated = Emulated, inet_ssl = Sock,
inet_user = Sock, transport_info = CbInfo, connection_cb = ConnetionCb
}}.
handle_option(OptionName, Opts, Default, Role, Role) ->
handle_option(OptionName, Opts, Default);
handle_option(_, _, undefined = Value, _, _) ->
Value.
handle_option(sni_fun, Opts, Default) ->
OptFun = validate_option(sni_fun,
proplists:get_value(sni_fun, Opts, Default)),
OptHosts = proplists:get_value(sni_hosts, Opts, undefined),
case {OptFun, OptHosts} of
{Default, _} ->
Default;
{_, undefined} ->
OptFun;
_ ->
throw({error, {conflict_options, [sni_fun, sni_hosts]}})
end;
handle_option(OptionName, Opts, Default) ->
validate_option(OptionName,
proplists:get_value(OptionName, Opts, Default)).
validate_option(versions, Versions) ->
validate_versions(Versions, Versions);
validate_option(verify, Value)
when Value == verify_none; Value == verify_peer ->
Value;
validate_option(verify_fun, undefined) ->
undefined;
%% Backwards compatibility
validate_option(verify_fun, Fun) when is_function(Fun) ->
{fun(_,{bad_cert, _} = Reason, OldFun) ->
case OldFun([Reason]) of
true ->
{valid, OldFun};
false ->
{fail, Reason}
end;
(_,{extension, _}, UserState) ->
{unknown, UserState};
(_, valid, UserState) ->
{valid, UserState};
(_, valid_peer, UserState) ->
{valid, UserState}
end, Fun};
validate_option(verify_fun, {Fun, _} = Value) when is_function(Fun) ->
Value;
validate_option(partial_chain, Value) when is_function(Value) ->
Value;
validate_option(fail_if_no_peer_cert, Value) when is_boolean(Value) ->
Value;
validate_option(verify_client_once, Value) when is_boolean(Value) ->
Value;
validate_option(depth, Value) when is_integer(Value),
Value >= 0, Value =< 255->
Value;
validate_option(cert, Value) when Value == undefined;
is_binary(Value) ->
Value;
validate_option(certfile, undefined = Value) ->
Value;
validate_option(certfile, Value) when is_binary(Value) ->
Value;
validate_option(certfile, Value) when is_list(Value) ->
binary_filename(Value);
validate_option(key, undefined) ->
undefined;
validate_option(key, {KeyType, Value}) when is_binary(Value),
KeyType == rsa; %% Backwards compatibility
KeyType == dsa; %% Backwards compatibility
KeyType == 'RSAPrivateKey';
KeyType == 'DSAPrivateKey';
KeyType == 'ECPrivateKey';
KeyType == 'PrivateKeyInfo' ->
{KeyType, Value};
validate_option(key, #{algorithm := _} = Value) ->
Value;
validate_option(keyfile, undefined) ->
<<>>;
validate_option(keyfile, Value) when is_binary(Value) ->
Value;
validate_option(keyfile, Value) when is_list(Value), Value =/= "" ->
binary_filename(Value);
validate_option(password, Value) when is_list(Value) ->
Value;
validate_option(cacerts, Value) when Value == undefined;
is_list(Value) ->
Value;
%% certfile must be present in some cases otherwhise it can be set
%% to the empty string.
validate_option(cacertfile, undefined) ->
<<>>;
validate_option(cacertfile, Value) when is_binary(Value) ->
Value;
validate_option(cacertfile, Value) when is_list(Value), Value =/= ""->
binary_filename(Value);
validate_option(dh, Value) when Value == undefined;
is_binary(Value) ->
Value;
validate_option(dhfile, undefined = Value) ->
Value;
validate_option(dhfile, Value) when is_binary(Value) ->
Value;
validate_option(dhfile, Value) when is_list(Value), Value =/= "" ->
binary_filename(Value);
validate_option(psk_identity, undefined) ->
undefined;
validate_option(psk_identity, Identity)
when is_list(Identity), Identity =/= "", length(Identity) =< 65535 ->
binary_filename(Identity);
validate_option(user_lookup_fun, undefined) ->
undefined;
validate_option(user_lookup_fun, {Fun, _} = Value) when is_function(Fun, 3) ->
Value;
validate_option(srp_identity, undefined) ->
undefined;
validate_option(srp_identity, {Username, Password})
when is_list(Username), is_list(Password), Username =/= "", length(Username) =< 255 ->
{unicode:characters_to_binary(Username),
unicode:characters_to_binary(Password)};
validate_option(reuse_session, Value) when is_function(Value) ->
Value;
validate_option(reuse_sessions, Value) when is_boolean(Value) ->
Value;
validate_option(secure_renegotiate, Value) when is_boolean(Value) ->
Value;
validate_option(client_renegotiation, Value) when is_boolean(Value) ->
Value;
validate_option(renegotiate_at, Value) when is_integer(Value) ->
erlang:min(Value, ?DEFAULT_RENEGOTIATE_AT);
validate_option(hibernate_after, undefined) -> %% Backwards compatibility
infinity;
validate_option(hibernate_after, infinity) ->
infinity;
validate_option(hibernate_after, Value) when is_integer(Value), Value >= 0 ->
Value;
validate_option(erl_dist,Value) when is_boolean(Value) ->
Value;
validate_option(Opt, Value) when Opt =:= alpn_advertised_protocols orelse Opt =:= alpn_preferred_protocols,
is_list(Value) ->
validate_binary_list(Opt, Value),
Value;
validate_option(Opt, Value)
when Opt =:= alpn_advertised_protocols orelse Opt =:= alpn_preferred_protocols,
Value =:= undefined ->
undefined;
validate_option(client_preferred_next_protocols, {Precedence, PreferredProtocols})
when is_list(PreferredProtocols) ->
validate_binary_list(client_preferred_next_protocols, PreferredProtocols),
validate_npn_ordering(Precedence),
{Precedence, PreferredProtocols, ?NO_PROTOCOL};
validate_option(client_preferred_next_protocols, {Precedence, PreferredProtocols, Default} = Value)
when is_list(PreferredProtocols), is_binary(Default),
byte_size(Default) > 0, byte_size(Default) < 256 ->
validate_binary_list(client_preferred_next_protocols, PreferredProtocols),
validate_npn_ordering(Precedence),
Value;
validate_option(client_preferred_next_protocols, undefined) ->
undefined;
validate_option(log_alert, true) ->
notice;
validate_option(log_alert, false) ->
warning;
validate_option(log_level, Value) when
is_atom(Value) andalso
(Value =:= emergency orelse
Value =:= alert orelse
Value =:= critical orelse
Value =:= error orelse
Value =:= warning orelse
Value =:= notice orelse
Value =:= info orelse
Value =:= debug) ->
Value;
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(server_name_indication, Value) when is_list(Value) ->
%% RFC 6066, Section 3: Currently, the only server names supported are
%% DNS hostnames
%% case inet_parse:domain(Value) of
%% false ->
%% throw({error, {options, {{Opt, Value}}}});
%% true ->
%% Value
%% end;
%%
%% But the definition seems very diffuse, so let all strings through
%% and leave it up to public_key to decide...
Value;
validate_option(server_name_indication, undefined) ->
undefined;
validate_option(server_name_indication, disable) ->
disable;
validate_option(sni_hosts, []) ->
[];
validate_option(sni_hosts, [{Hostname, SSLOptions} | Tail]) when is_list(Hostname) ->
RecursiveSNIOptions = proplists:get_value(sni_hosts, SSLOptions, undefined),
case RecursiveSNIOptions of
undefined ->
[{Hostname, validate_options(SSLOptions)} | validate_option(sni_hosts, Tail)];
_ ->
throw({error, {options, {sni_hosts, RecursiveSNIOptions}}})
end;
validate_option(sni_fun, undefined) ->
undefined;
validate_option(sni_fun, Fun) when is_function(Fun) ->
Fun;
validate_option(honor_cipher_order, Value) when is_boolean(Value) ->
Value;
validate_option(honor_ecc_order, Value) when is_boolean(Value) ->
Value;
validate_option(padding_check, Value) when is_boolean(Value) ->
Value;
validate_option(fallback, Value) when is_boolean(Value) ->
Value;
validate_option(crl_check, Value) when is_boolean(Value) ->
Value;
validate_option(crl_check, Value) when (Value == best_effort) or (Value == peer) ->
Value;
validate_option(crl_cache, {Cb, {_Handle, Options}} = Value) when is_atom(Cb) and is_list(Options) ->
Value;
validate_option(beast_mitigation, Value) when Value == one_n_minus_one orelse
Value == zero_n orelse
Value == disabled ->
Value;
validate_option(max_handshake_size, Value) when is_integer(Value) andalso Value =< ?MAX_UNIT24 ->
Value;
validate_option(protocol, Value = tls) ->
Value;
validate_option(protocol, Value = dtls) ->
Value;
validate_option(handshake, hello = Value) ->
Value;
validate_option(handshake, full = Value) ->
Value;
validate_option(customize_hostname_check, Value) when is_list(Value) ->
Value;
validate_option(Opt, Value) ->
throw({error, {options, {Opt, Value}}}).
handle_hashsigns_option(Value, Version) when is_list(Value)
andalso Version >= {3, 3} ->
case tls_v1:signature_algs(Version, Value) of
[] ->
throw({error, {options, no_supported_algorithms, {signature_algs, Value}}});
_ ->
Value
end;
handle_hashsigns_option(_, Version) when Version >= {3, 3} ->
handle_hashsigns_option(tls_v1:default_signature_algs(Version), Version);
handle_hashsigns_option(_, _Version) ->
undefined.
handle_signature_algorithms_option(Value, Version) when is_list(Value)
andalso Version >= {3, 4} ->
case tls_v1:signature_schemes(Version, Value) of
[] ->
throw({error, {options,
no_supported_signature_schemes,
{signature_algs_cert, Value}}});
_ ->
Value
end;
handle_signature_algorithms_option(_, _Version) ->
undefined.
validate_options([]) ->
[];
validate_options([{Opt, Value} | Tail]) ->
[{Opt, validate_option(Opt, Value)} | validate_options(Tail)].
validate_npn_ordering(client) ->
ok;
validate_npn_ordering(server) ->
ok;
validate_npn_ordering(Value) ->
throw({error, {options, {client_preferred_next_protocols, {invalid_precedence, 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, {options, {Opt, {invalid_protocol, Bin}}}})
end, List).
validate_versions([], Versions) ->
Versions;
validate_versions([Version | Rest], Versions) when Version == 'tlsv1.3';
Version == 'tlsv1.2';
Version == 'tlsv1.1';
Version == tlsv1;
Version == sslv3 ->
tls_validate_versions(Rest, Versions);
validate_versions([Version | Rest], Versions) when Version == 'dtlsv1';
Version == 'dtlsv1.2'->
dtls_validate_versions(Rest, Versions);
validate_versions([Ver| _], Versions) ->
throw({error, {options, {Ver, {versions, Versions}}}}).
tls_validate_versions([], Versions) ->
Versions;
tls_validate_versions([Version | Rest], Versions) when Version == 'tlsv1.3';
Version == 'tlsv1.2';
Version == 'tlsv1.1';
Version == tlsv1;
Version == sslv3 ->
tls_validate_versions(Rest, Versions);
tls_validate_versions([Ver| _], Versions) ->
throw({error, {options, {Ver, {versions, Versions}}}}).
dtls_validate_versions([], Versions) ->
Versions;
dtls_validate_versions([Version | Rest], Versions) when Version == 'dtlsv1';
Version == 'dtlsv1.2'->
dtls_validate_versions(Rest, Versions);
dtls_validate_versions([Ver| _], Versions) ->
throw({error, {options, {Ver, {versions, Versions}}}}).
%% The option cacerts overrides cacertsfile
ca_cert_default(_,_, [_|_]) ->
undefined;
ca_cert_default(verify_none, _, _) ->
undefined;
ca_cert_default(verify_peer, {Fun,_}, _) when is_function(Fun) ->
undefined;
%% Server that wants to verify_peer and has no verify_fun must have
%% some trusted certs.
ca_cert_default(verify_peer, undefined, _) ->
"".
emulated_options(Protocol, Opts) ->
case Protocol of
tls ->
tls_socket:emulated_options(Opts);
dtls ->
dtls_socket:emulated_options(Opts)
end.
handle_cipher_option(Value, Version) when is_list(Value) ->
try binary_cipher_suites(Version, Value) of
Suites ->
Suites
catch
exit:_ ->
throw({error, {options, {ciphers, Value}}});
error:_->
throw({error, {options, {ciphers, Value}}})
end.
binary_cipher_suites(Version, []) ->
%% Defaults to all supported suites that does
%% not require explicit configuration
default_binary_suites(Version);
binary_cipher_suites(Version, [Map|_] = Ciphers0) when is_map(Map) ->
Ciphers = [ssl_cipher_format:suite(C) || C <- Ciphers0],
binary_cipher_suites(Version, Ciphers);
binary_cipher_suites(Version, [Tuple|_] = Ciphers0) when is_tuple(Tuple) ->
Ciphers = [ssl_cipher_format:suite(tuple_to_map(C)) || C <- Ciphers0],
binary_cipher_suites(Version, Ciphers);
binary_cipher_suites(Version, [Cipher0 | _] = Ciphers0) when is_binary(Cipher0) ->
All = ssl_cipher:all_suites(Version) ++
ssl_cipher:anonymous_suites(Version),
case [Cipher || Cipher <- Ciphers0, lists:member(Cipher, All)] of
[] ->
%% Defaults to all supported suites that does
%% not require explicit configuration
default_binary_suites(Version);
Ciphers ->
Ciphers
end;
binary_cipher_suites(Version, [Head | _] = Ciphers0) when is_list(Head) ->
%% Format: ["RC4-SHA","RC4-MD5"]
Ciphers = [ssl_cipher_format:openssl_suite(C) || C <- Ciphers0],
binary_cipher_suites(Version, Ciphers);
binary_cipher_suites(Version, Ciphers0) ->
%% Format: "RC4-SHA:RC4-MD5"
Ciphers = [ssl_cipher_format:openssl_suite(C) || C <- string:lexemes(Ciphers0, ":")],
binary_cipher_suites(Version, Ciphers).
default_binary_suites(Version) ->
ssl_cipher:filter_suites(ssl_cipher:suites(Version)).
tuple_to_map({Kex, Cipher, Mac}) ->
#{key_exchange => Kex,
cipher => Cipher,
mac => Mac,
prf => default_prf};
tuple_to_map({Kex, Cipher, Mac, Prf}) ->
#{key_exchange => Kex,
cipher => Cipher,
mac => tuple_to_map_mac(Cipher, Mac),
prf => Prf}.
%% Backwards compatible
tuple_to_map_mac(aes_128_gcm, _) ->
aead;
tuple_to_map_mac(aes_256_gcm, _) ->
aead;
tuple_to_map_mac(chacha20_poly1305, _) ->
aead;
tuple_to_map_mac(_, MAC) ->
MAC.
handle_eccs_option(Value, Version) when is_list(Value) ->
{_Major, Minor} = tls_version(Version),
try tls_v1:ecc_curves(Minor, Value) of
Curves -> #elliptic_curves{elliptic_curve_list = Curves}
catch
exit:_ -> throw({error, {options, {eccs, Value}}});
error:_ -> throw({error, {options, {eccs, Value}}})
end.
unexpected_format(Error) ->
lists:flatten(io_lib:format("Unexpected error: ~p", [Error])).
file_error_format({error, Error})->
case file:format_error(Error) of
"unknown POSIX error" ->
"decoding error";
Str ->
Str
end;
file_error_format(_) ->
"decoding error".
file_desc(cacertfile) ->
"Invalid CA certificate file ";
file_desc(certfile) ->
"Invalid certificate file ";
file_desc(keyfile) ->
"Invalid key file ";
file_desc(dhfile) ->
"Invalid DH params file ".
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({client, AllProtocols, DefaultProtocol}) ->
fun(AdvertisedProtocols) ->
case detect(fun(PreferredProtocol) ->
lists:member(PreferredProtocol, AdvertisedProtocols)
end, AllProtocols) of
undefined ->
DefaultProtocol;
PreferredProtocol ->
PreferredProtocol
end
end;
make_next_protocol_selector({server, AllProtocols, DefaultProtocol}) ->
fun(AdvertisedProtocols) ->
case detect(fun(PreferredProtocol) ->
lists:member(PreferredProtocol, AllProtocols)
end,
AdvertisedProtocols) of
undefined ->
DefaultProtocol;
PreferredProtocol ->
PreferredProtocol
end
end.
connection_cb(tls) ->
tls_connection;
connection_cb(dtls) ->
dtls_connection;
connection_cb(Opts) ->
connection_cb(proplists:get_value(protocol, Opts, tls)).
record_cb(tls) ->
tls_record;
record_cb(dtls) ->
dtls_record;
record_cb(Opts) ->
record_cb(proplists:get_value(protocol, Opts, tls)).
binary_filename(FileName) ->
Enc = file:native_name_encoding(),
unicode:characters_to_binary(FileName, unicode, Enc).
assert_proplist([]) ->
true;
assert_proplist([{Key,_} | Rest]) when is_atom(Key) ->
assert_proplist(Rest);
%% Handle exceptions
assert_proplist([{raw,_,_,_} | Rest]) ->
assert_proplist(Rest);
assert_proplist([inet | Rest]) ->
assert_proplist(Rest);
assert_proplist([inet6 | Rest]) ->
assert_proplist(Rest);
assert_proplist([Value | _]) ->
throw({option_not_a_key_value_tuple, Value}).
new_ssl_options([], #ssl_options{} = Opts, _) ->
Opts;
new_ssl_options([{verify_client_once, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{verify_client_once =
validate_option(verify_client_once, Value)}, RecordCB);
new_ssl_options([{depth, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{depth = validate_option(depth, Value)}, RecordCB);
new_ssl_options([{cert, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{cert = validate_option(cert, Value)}, RecordCB);
new_ssl_options([{certfile, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{certfile = validate_option(certfile, Value)}, RecordCB);
new_ssl_options([{key, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{key = validate_option(key, Value)}, RecordCB);
new_ssl_options([{keyfile, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{keyfile = validate_option(keyfile, Value)}, RecordCB);
new_ssl_options([{password, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{password = validate_option(password, Value)}, RecordCB);
new_ssl_options([{dh, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{dh = validate_option(dh, Value)}, RecordCB);
new_ssl_options([{dhfile, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{dhfile = validate_option(dhfile, Value)}, RecordCB);
new_ssl_options([{user_lookup_fun, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{user_lookup_fun = validate_option(user_lookup_fun, Value)}, RecordCB);
new_ssl_options([{psk_identity, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{psk_identity = validate_option(psk_identity, Value)}, RecordCB);
new_ssl_options([{srp_identity, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{srp_identity = validate_option(srp_identity, Value)}, RecordCB);
new_ssl_options([{ciphers, Value} | Rest], #ssl_options{versions = Versions} = Opts, RecordCB) ->
Ciphers = handle_cipher_option(Value, RecordCB:highest_protocol_version(Versions)),
new_ssl_options(Rest,
Opts#ssl_options{ciphers = Ciphers}, RecordCB);
new_ssl_options([{reuse_session, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{reuse_session = validate_option(reuse_session, Value)}, RecordCB);
new_ssl_options([{reuse_sessions, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{reuse_sessions = validate_option(reuse_sessions, Value)}, RecordCB);
new_ssl_options([{ssl_imp, _Value} | Rest], #ssl_options{} = Opts, RecordCB) -> %% Not used backwards compatibility
new_ssl_options(Rest, Opts, RecordCB);
new_ssl_options([{renegotiate_at, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{ renegotiate_at = validate_option(renegotiate_at, Value)}, RecordCB);
new_ssl_options([{secure_renegotiate, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{secure_renegotiate = validate_option(secure_renegotiate, Value)}, RecordCB);
new_ssl_options([{client_renegotiation, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{client_renegotiation = validate_option(client_renegotiation, Value)}, RecordCB);
new_ssl_options([{hibernate_after, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{hibernate_after = validate_option(hibernate_after, Value)}, RecordCB);
new_ssl_options([{alpn_advertised_protocols, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{alpn_advertised_protocols = validate_option(alpn_advertised_protocols, Value)}, RecordCB);
new_ssl_options([{alpn_preferred_protocols, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{alpn_preferred_protocols = validate_option(alpn_preferred_protocols, Value)}, RecordCB);
new_ssl_options([{next_protocols_advertised, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{next_protocols_advertised = validate_option(next_protocols_advertised, Value)}, RecordCB);
new_ssl_options([{client_preferred_next_protocols, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{next_protocol_selector =
make_next_protocol_selector(validate_option(client_preferred_next_protocols, Value))}, RecordCB);
new_ssl_options([{log_alert, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{log_level = validate_option(log_alert, Value)}, RecordCB);
new_ssl_options([{log_level, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{log_level = validate_option(log_level, Value)}, RecordCB);
new_ssl_options([{server_name_indication, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{server_name_indication = validate_option(server_name_indication, Value)}, RecordCB);
new_ssl_options([{honor_cipher_order, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{honor_cipher_order = validate_option(honor_cipher_order, Value)}, RecordCB);
new_ssl_options([{honor_ecc_order, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{honor_ecc_order = validate_option(honor_ecc_order, Value)}, RecordCB);
new_ssl_options([{eccs, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest,
Opts#ssl_options{eccs =
handle_eccs_option(Value, RecordCB:highest_protocol_version())
},
RecordCB);
new_ssl_options([{signature_algs, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(Rest,
Opts#ssl_options{signature_algs =
handle_hashsigns_option(Value,
tls_version(RecordCB:highest_protocol_version()))},
RecordCB);
new_ssl_options([{signature_algs_cert, Value} | Rest], #ssl_options{} = Opts, RecordCB) ->
new_ssl_options(
Rest,
Opts#ssl_options{signature_algs_cert =
handle_signature_algorithms_option(
Value,
tls_version(RecordCB:highest_protocol_version()))},
RecordCB);
new_ssl_options([{protocol, dtls = Value} | Rest], #ssl_options{} = Opts, dtls_record = RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{protocol = Value}, RecordCB);
new_ssl_options([{protocol, tls = Value} | Rest], #ssl_options{} = Opts, tls_record = RecordCB) ->
new_ssl_options(Rest, Opts#ssl_options{protocol = Value}, RecordCB);
new_ssl_options([{Key, Value} | _Rest], #ssl_options{}, _) ->
throw({error, {options, {Key, Value}}}).
handle_verify_options(Opts, CaCerts) ->
DefaultVerifyNoneFun =
{fun(_,{bad_cert, _}, UserState) ->
{valid, UserState};
(_,{extension, #'Extension'{critical = true}}, UserState) ->
%% This extension is marked as critical, so
%% certificate verification should fail if we don't
%% understand the extension. However, this is
%% `verify_none', so let's accept it anyway.
{valid, UserState};
(_,{extension, _}, UserState) ->
{unknown, UserState};
(_, valid, UserState) ->
{valid, UserState};
(_, valid_peer, UserState) ->
{valid, UserState}
end, []},
VerifyNoneFun = handle_option(verify_fun, Opts, DefaultVerifyNoneFun),
UserFailIfNoPeerCert = handle_option(fail_if_no_peer_cert, Opts, false),
UserVerifyFun = handle_option(verify_fun, Opts, undefined),
PartialChainHanlder = handle_option(partial_chain, Opts,
fun(_) -> unknown_ca end),
VerifyClientOnce = handle_option(verify_client_once, Opts, false),
%% Handle 0, 1, 2 for backwards compatibility
case proplists:get_value(verify, Opts, verify_none) of
0 ->
{verify_none, false,
ca_cert_default(verify_none, VerifyNoneFun, CaCerts),
VerifyNoneFun, PartialChainHanlder, VerifyClientOnce};
1 ->
{verify_peer, false,
ca_cert_default(verify_peer, UserVerifyFun, CaCerts),
UserVerifyFun, PartialChainHanlder, VerifyClientOnce};
2 ->
{verify_peer, true,
ca_cert_default(verify_peer, UserVerifyFun, CaCerts),
UserVerifyFun, PartialChainHanlder, VerifyClientOnce};
verify_none ->
{verify_none, false,
ca_cert_default(verify_none, VerifyNoneFun, CaCerts),
VerifyNoneFun, PartialChainHanlder, VerifyClientOnce};
verify_peer ->
{verify_peer, UserFailIfNoPeerCert,
ca_cert_default(verify_peer, UserVerifyFun, CaCerts),
UserVerifyFun, PartialChainHanlder, VerifyClientOnce};
Value ->
throw({error, {options, {verify, Value}}})
end.
default_option_role(Role, Value, Role) ->
Value;
default_option_role(_,_,_) ->
undefined.
default_cb_info(tls) ->
{gen_tcp, tcp, tcp_closed, tcp_error};
default_cb_info(dtls) ->
{gen_udp, udp, udp_closed, udp_error}.
include_security_info([]) ->
false;
include_security_info([Item | Items]) ->
case lists:member(Item, [client_random, server_random, master_secret]) of
true ->
true;
false ->
include_security_info(Items)
end.
server_name_indication_default(Host) when is_list(Host) ->
Host;
server_name_indication_default(_) ->
undefined.
reject_alpn_next_prot_options(Opts) ->
AlpnNextOpts = [alpn_advertised_protocols,
alpn_preferred_protocols,
next_protocols_advertised,
next_protocol_selector,
client_preferred_next_protocols],
reject_alpn_next_prot_options(AlpnNextOpts, Opts).
reject_alpn_next_prot_options([], _) ->
ok;
reject_alpn_next_prot_options([Opt| AlpnNextOpts], Opts) ->
case lists:keyfind(Opt, 1, Opts) of
{Opt, Value} ->
throw({error, {options, {not_supported_in_sslv3, {Opt, Value}}}});
false ->
reject_alpn_next_prot_options(AlpnNextOpts, Opts)
end.
add_filter(undefined, Filters) ->
Filters;
add_filter(Filter, Filters) ->
[Filter | Filters].