%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2013-2016. 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: Common handling of a TLS/SSL/DTLS connection, see also
%% tls_connection.erl and dtls_connection.erl
%%----------------------------------------------------------------------
-module(ssl_connection).
-include("ssl_api.hrl").
-include("ssl_connection.hrl").
-include("ssl_handshake.hrl").
-include("ssl_alert.hrl").
-include("ssl_record.hrl").
-include("ssl_cipher.hrl").
-include("ssl_internal.hrl").
-include("ssl_srp.hrl").
-include_lib("public_key/include/public_key.hrl").
%% Setup
-export([connect/8, ssl_accept/7, handshake/2, handshake/3,
socket_control/4, socket_control/5, start_or_recv_cancel_timer/2]).
%% User Events
-export([send/2, recv/3, close/2, shutdown/2,
new_user/2, get_opts/2, set_opts/2, session_info/1,
peer_certificate/1, renegotiation/1, negotiated_protocol/1, prf/5,
connection_information/1
]).
%% General gen_statem state functions with extra callback argument
%% to determine if it is an SSL/TLS or DTLS gen_statem machine
-export([init/4, hello/4, abbreviated/4, certify/4, cipher/4, connection/4, downgrade/4]).
%% gen_statem callbacks
-export([terminate/3, format_status/2]).
%%
-export([handle_info/3, handle_call/5, handle_session/7, ssl_config/3,
prepare_connection/2, hibernate_after/3]).
%%====================================================================
%% Internal application API
%%====================================================================
%%--------------------------------------------------------------------
-spec connect(tls_connection | dtls_connection,
host(), inet:port_number(), port(),
{#ssl_options{}, #socket_options{},
%% Tracker only needed on server side
undefined},
pid(), tuple(), timeout()) ->
{ok, #sslsocket{}} | {error, reason()}.
%%
%% Description: Connect to an ssl server.
%%--------------------------------------------------------------------
connect(Connection, Host, Port, Socket, Options, User, CbInfo, Timeout) ->
try Connection:start_fsm(client, Host, Port, Socket, Options, User, CbInfo,
Timeout)
catch
exit:{noproc, _} ->
{error, ssl_not_started}
end.
%%--------------------------------------------------------------------
-spec ssl_accept(tls_connection | dtls_connection,
inet:port_number(), port(),
{#ssl_options{}, #socket_options{}, undefined | pid()},
pid(), tuple(), timeout()) ->
{ok, #sslsocket{}} | {error, reason()}.
%%
%% Description: Performs accept on an ssl listen socket. e.i. performs
%% ssl handshake.
%%--------------------------------------------------------------------
ssl_accept(Connection, Port, Socket, Opts, User, CbInfo, Timeout) ->
try Connection:start_fsm(server, "localhost", Port, Socket, Opts, User,
CbInfo, Timeout)
catch
exit:{noproc, _} ->
{error, ssl_not_started}
end.
%%--------------------------------------------------------------------
-spec handshake(#sslsocket{}, timeout()) -> ok | {error, reason()}.
%%
%% Description: Starts ssl handshake.
%%--------------------------------------------------------------------
handshake(#sslsocket{pid = Pid}, Timeout) ->
case call(Pid, {start, Timeout}) of
connected ->
ok;
Error ->
Error
end.
%%--------------------------------------------------------------------
-spec handshake(#sslsocket{}, {#ssl_options{},#socket_options{}},
timeout()) -> ok | {error, reason()}.
%%
%% Description: Starts ssl handshake with some new options
%%--------------------------------------------------------------------
handshake(#sslsocket{pid = Pid}, SslOptions, Timeout) ->
case call(Pid, {start, SslOptions, Timeout}) of
connected ->
ok;
Error ->
Error
end.
%--------------------------------------------------------------------
-spec socket_control(tls_connection | dtls_connection, port(), pid(), atom()) ->
{ok, #sslsocket{}} | {error, reason()}.
%%
%% Description: Set the ssl process to own the accept socket
%%--------------------------------------------------------------------
socket_control(Connection, Socket, Pid, Transport) ->
socket_control(Connection, Socket, Pid, Transport, undefined).
%--------------------------------------------------------------------
-spec socket_control(tls_connection | dtls_connection, port(), pid(), atom(), pid()| undefined) ->
{ok, #sslsocket{}} | {error, reason()}.
%%--------------------------------------------------------------------
socket_control(Connection, Socket, Pid, Transport, ListenTracker) ->
case Transport:controlling_process(Socket, Pid) of
ok ->
{ok, ssl_socket:socket(Pid, Transport, Socket, Connection, ListenTracker)};
{error, Reason} ->
{error, Reason}
end.
%%--------------------------------------------------------------------
-spec send(pid(), iodata()) -> ok | {error, reason()}.
%%
%% Description: Sends data over the ssl connection
%%--------------------------------------------------------------------
send(Pid, Data) ->
call(Pid, {application_data,
%% iolist_to_binary should really
%% be called iodata_to_binary()
erlang:iolist_to_binary(Data)}).
%%--------------------------------------------------------------------
-spec recv(pid(), integer(), timeout()) ->
{ok, binary() | list()} | {error, reason()}.
%%
%% Description: Receives data when active = false
%%--------------------------------------------------------------------
recv(Pid, Length, Timeout) ->
call(Pid, {recv, Length, Timeout}).
%%--------------------------------------------------------------------
-spec connection_information(pid()) -> {ok, list()} | {error, reason()}.
%%
%% Description: Get the SNI hostname
%%--------------------------------------------------------------------
connection_information(Pid) when is_pid(Pid) ->
call(Pid, connection_information).
%%--------------------------------------------------------------------
-spec close(pid(), {close, Timeout::integer() |
{NewController::pid(), Timeout::integer()}}) ->
ok | {ok, port()} | {error, reason()}.
%%
%% Description: Close an ssl connection
%%--------------------------------------------------------------------
close(ConnectionPid, How) ->
case call(ConnectionPid, How) of
{error, closed} ->
ok;
Other ->
Other
end.
%%--------------------------------------------------------------------
-spec shutdown(pid(), atom()) -> ok | {error, reason()}.
%%
%% Description: Same as gen_tcp:shutdown/2
%%--------------------------------------------------------------------
shutdown(ConnectionPid, How) ->
call(ConnectionPid, {shutdown, How}).
%%--------------------------------------------------------------------
-spec new_user(pid(), pid()) -> ok | {error, reason()}.
%%
%% Description: Changes process that receives the messages when active = true
%% or once.
%%--------------------------------------------------------------------
new_user(ConnectionPid, User) ->
call(ConnectionPid, {new_user, User}).
%%--------------------------------------------------------------------
-spec negotiated_protocol(pid()) -> {ok, binary()} | {error, reason()}.
%%
%% Description: Returns the negotiated protocol
%%--------------------------------------------------------------------
negotiated_protocol(ConnectionPid) ->
call(ConnectionPid, negotiated_protocol).
%%--------------------------------------------------------------------
-spec get_opts(pid(), list()) -> {ok, list()} | {error, reason()}.
%%
%% Description: Same as inet:getopts/2
%%--------------------------------------------------------------------
get_opts(ConnectionPid, OptTags) ->
call(ConnectionPid, {get_opts, OptTags}).
%%--------------------------------------------------------------------
-spec set_opts(pid(), list()) -> ok | {error, reason()}.
%%
%% Description: Same as inet:setopts/2
%%--------------------------------------------------------------------
set_opts(ConnectionPid, Options) ->
call(ConnectionPid, {set_opts, Options}).
%%--------------------------------------------------------------------
-spec session_info(pid()) -> {ok, list()} | {error, reason()}.
%%
%% Description: Returns info about the ssl session
%%--------------------------------------------------------------------
session_info(ConnectionPid) ->
call(ConnectionPid, session_info).
%%--------------------------------------------------------------------
-spec peer_certificate(pid()) -> {ok, binary()| undefined} | {error, reason()}.
%%
%% Description: Returns the peer cert
%%--------------------------------------------------------------------
peer_certificate(ConnectionPid) ->
call(ConnectionPid, peer_certificate).
%%--------------------------------------------------------------------
-spec renegotiation(pid()) -> ok | {error, reason()}.
%%
%% Description: Starts a renegotiation of the ssl session.
%%--------------------------------------------------------------------
renegotiation(ConnectionPid) ->
call(ConnectionPid, renegotiate).
%%--------------------------------------------------------------------
-spec prf(pid(), binary() | 'master_secret', binary(),
binary() | ssl:prf_random(), non_neg_integer()) ->
{ok, binary()} | {error, reason()} | {'EXIT', term()}.
%%
%% Description: use a ssl sessions TLS PRF to generate key material
%%--------------------------------------------------------------------
prf(ConnectionPid, Secret, Label, Seed, WantedLength) ->
call(ConnectionPid, {prf, Secret, Label, Seed, WantedLength}).
%%--------------------------------------------------------------------
-spec handle_session(#server_hello{}, ssl_record:ssl_version(),
binary(), #connection_states{}, _,_, #state{}) ->
gen_statem:state_function_result().
%%--------------------------------------------------------------------
handle_session(#server_hello{cipher_suite = CipherSuite,
compression_method = Compression},
Version, NewId, ConnectionStates, ProtoExt, Protocol0,
#state{session = #session{session_id = OldId},
negotiated_version = ReqVersion,
negotiated_protocol = CurrentProtocol} = State0) ->
{KeyAlgorithm, _, _, _} =
ssl_cipher:suite_definition(CipherSuite),
PremasterSecret = make_premaster_secret(ReqVersion, KeyAlgorithm),
{ExpectNPN, Protocol} = case Protocol0 of
undefined -> {false, CurrentProtocol};
_ -> {ProtoExt =:= npn, Protocol0}
end,
State = State0#state{key_algorithm = KeyAlgorithm,
negotiated_version = Version,
connection_states = ConnectionStates,
premaster_secret = PremasterSecret,
expecting_next_protocol_negotiation = ExpectNPN,
negotiated_protocol = Protocol},
case ssl_session:is_new(OldId, NewId) of
true ->
handle_new_session(NewId, CipherSuite, Compression,
State#state{connection_states = ConnectionStates});
false ->
handle_resumed_session(NewId,
State#state{connection_states = ConnectionStates})
end.
%%--------------------------------------------------------------------
-spec ssl_config(#ssl_options{}, client | server, #state{}) -> #state{}.
%%--------------------------------------------------------------------
ssl_config(Opts, Role, State) ->
{ok, Ref, CertDbHandle, FileRefHandle, CacheHandle, CRLDbInfo,
OwnCert, Key, DHParams} =
ssl_config:init(Opts, Role),
Handshake = ssl_handshake:init_handshake_history(),
TimeStamp = erlang:monotonic_time(),
Session = State#state.session,
State#state{tls_handshake_history = Handshake,
session = Session#session{own_certificate = OwnCert,
time_stamp = TimeStamp},
file_ref_db = FileRefHandle,
cert_db_ref = Ref,
cert_db = CertDbHandle,
crl_db = CRLDbInfo,
session_cache = CacheHandle,
private_key = Key,
diffie_hellman_params = DHParams,
ssl_options = Opts}.
%%====================================================================
%% gen_statem state functions
%%====================================================================
%%--------------------------------------------------------------------
-spec init(gen_statem:event_type(),
{start, timeout()} | {start, {list(), list()}, timeout()}| term(),
#state{}, tls_connection | dtls_connection) ->
gen_statem:state_function_result().
%%--------------------------------------------------------------------
init({call, From}, {start, Timeout}, State0, Connection) ->
Timer = start_or_recv_cancel_timer(Timeout, From),
{Record, State} = Connection:next_record(State0#state{start_or_recv_from = From,
timer = Timer}),
Connection:next_event(hello, Record, State);
init({call, From}, {start, {Opts, EmOpts}, Timeout},
#state{role = Role} = State0, Connection) ->
try
State = ssl_config(Opts, Role, State0),
init({call, From}, {start, Timeout},
State#state{ssl_options = Opts, socket_options = EmOpts}, Connection)
catch throw:Error ->
{stop_and_reply, normal, {reply, From, {error, Error}}}
end;
init({call, From}, Msg, State, Connection) ->
handle_call(Msg, From, init, State, Connection);
init(_Type, _Event, _State, _Connection) ->
{keep_state_and_data, [postpone]}.
%%--------------------------------------------------------------------
-spec hello(gen_statem:event_type(),
#hello_request{} | #server_hello{} | term(),
#state{}, tls_connection | dtls_connection) ->
gen_statem:state_function_result().
%%--------------------------------------------------------------------
hello({call, From}, Msg, State, Connection) ->
handle_call(Msg, From, hello, State, Connection);
hello(internal, {common_client_hello, Type, ServerHelloExt}, State, Connection) ->
do_server_hello(Type, ServerHelloExt, State, Connection);
hello(info, Msg, State, _) ->
handle_info(Msg, hello, State);
hello(Type, Msg, State, Connection) ->
handle_common_event(Type, Msg, hello, State, Connection).
%%--------------------------------------------------------------------
-spec abbreviated(gen_statem:event_type(),
#hello_request{} | #finished{} | term(),
#state{}, tls_connection | dtls_connection) ->
gen_statem:state_function_result().
%%--------------------------------------------------------------------
abbreviated({call, From}, Msg, State, Connection) ->
handle_call(Msg, From, abbreviated, State, Connection);
abbreviated(internal, #finished{verify_data = Data} = Finished,
#state{role = server,
negotiated_version = Version,
expecting_finished = true,
tls_handshake_history = Handshake,
session = #session{master_secret = MasterSecret},
connection_states = ConnectionStates0} =
State0, Connection) ->
case ssl_handshake:verify_connection(Version, Finished, client,
get_current_prf(ConnectionStates0, write),
MasterSecret, Handshake) of
verified ->
ConnectionStates =
ssl_record:set_client_verify_data(current_both, Data, ConnectionStates0),
{Record, State} = prepare_connection(State0#state{connection_states = ConnectionStates,
expecting_finished = false}, Connection),
Connection:next_event(connection, Record, State);
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, abbreviated, State0)
end;
abbreviated(internal, #finished{verify_data = Data} = Finished,
#state{role = client, tls_handshake_history = Handshake0,
session = #session{master_secret = MasterSecret},
negotiated_version = Version,
connection_states = ConnectionStates0} = State0, Connection) ->
case ssl_handshake:verify_connection(Version, Finished, server,
get_pending_prf(ConnectionStates0, write),
MasterSecret, Handshake0) of
verified ->
ConnectionStates1 =
ssl_record:set_server_verify_data(current_read, Data, ConnectionStates0),
State1 =
finalize_handshake(State0#state{connection_states = ConnectionStates1},
abbreviated, Connection),
{Record, State} = prepare_connection(State1#state{expecting_finished = false}, Connection),
Connection:next_event(connection, Record, State);
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, abbreviated, State0)
end;
%% only allowed to send next_protocol message after change cipher spec
%% & before finished message and it is not allowed during renegotiation
abbreviated(internal, #next_protocol{selected_protocol = SelectedProtocol},
#state{role = server, expecting_next_protocol_negotiation = true} = State0,
Connection) ->
{Record, State} =
Connection:next_record(State0#state{negotiated_protocol = SelectedProtocol}),
Connection:next_event(abbreviated, Record,
State#state{expecting_next_protocol_negotiation = false});
abbreviated(internal,
#change_cipher_spec{type = <<1>>}, #state{connection_states = ConnectionStates0} =
State0, Connection) ->
ConnectionStates1 =
ssl_record:activate_pending_connection_state(ConnectionStates0, read),
{Record, State} = Connection:next_record(State0#state{connection_states =
ConnectionStates1}),
Connection:next_event(abbreviated, Record, State#state{expecting_finished = true});
abbreviated(info, Msg, State, _) ->
handle_info(Msg, abbreviated, State);
abbreviated(Type, Msg, State, Connection) ->
handle_common_event(Type, Msg, abbreviated, State, Connection).
%%--------------------------------------------------------------------
-spec certify(gen_statem:event_type(),
#hello_request{} | #certificate{} | #server_key_exchange{} |
#certificate_request{} | #server_hello_done{} | #client_key_exchange{} | term(),
#state{}, tls_connection | dtls_connection) ->
gen_statem:state_function_result().
%%--------------------------------------------------------------------
certify({call, From}, Msg, State, Connection) ->
handle_call(Msg, From, certify, State, Connection);
certify(info, Msg, State, _) ->
handle_info(Msg, certify, State);
certify(internal, #certificate{asn1_certificates = []},
#state{role = server, negotiated_version = Version,
ssl_options = #ssl_options{verify = verify_peer,
fail_if_no_peer_cert = true}} =
State, Connection) ->
Alert = ?ALERT_REC(?FATAL,?HANDSHAKE_FAILURE),
Connection:handle_own_alert(Alert, Version, certify, State);
certify(internal, #certificate{asn1_certificates = []},
#state{role = server,
ssl_options = #ssl_options{verify = verify_peer,
fail_if_no_peer_cert = false}} =
State0, Connection) ->
{Record, State} =
Connection:next_record(State0#state{client_certificate_requested = false}),
Connection:next_event(certify, Record, State);
certify(internal, #certificate{},
#state{role = server,
negotiated_version = Version,
ssl_options = #ssl_options{verify = verify_none}} =
State, Connection) ->
Alert = ?ALERT_REC(?FATAL,?UNEXPECTED_MESSAGE, unrequested_certificate),
Connection:handle_own_alert(Alert, Version, certify, State);
certify(internal, #certificate{} = Cert,
#state{negotiated_version = Version,
role = Role,
cert_db = CertDbHandle,
cert_db_ref = CertDbRef,
crl_db = CRLDbInfo,
ssl_options = Opts} = State, Connection) ->
case ssl_handshake:certify(Cert, CertDbHandle, CertDbRef,
Opts#ssl_options.depth,
Opts#ssl_options.verify,
Opts#ssl_options.verify_fun,
Opts#ssl_options.partial_chain,
Opts#ssl_options.crl_check,
CRLDbInfo,
Role) of
{PeerCert, PublicKeyInfo} ->
handle_peer_cert(Role, PeerCert, PublicKeyInfo,
State#state{client_certificate_requested = false}, Connection);
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, certify, State)
end;
certify(internal, #server_key_exchange{exchange_keys = Keys},
#state{role = client, negotiated_version = Version,
key_algorithm = Alg,
public_key_info = PubKeyInfo,
connection_states = ConnectionStates} = State, Connection)
when Alg == dhe_dss; Alg == dhe_rsa;
Alg == ecdhe_rsa; Alg == ecdhe_ecdsa;
Alg == dh_anon; Alg == ecdh_anon;
Alg == psk; Alg == dhe_psk; Alg == rsa_psk;
Alg == srp_dss; Alg == srp_rsa; Alg == srp_anon ->
Params = ssl_handshake:decode_server_key(Keys, Alg, Version),
%% Use negotiated value if TLS-1.2 otherwhise return default
HashSign = negotiated_hashsign(Params#server_key_params.hashsign, Alg, PubKeyInfo, Version),
case is_anonymous(Alg) of
true ->
calculate_secret(Params#server_key_params.params,
State#state{hashsign_algorithm = HashSign}, Connection);
false ->
case ssl_handshake:verify_server_key(Params, HashSign,
ConnectionStates, Version, PubKeyInfo) of
true ->
calculate_secret(Params#server_key_params.params,
State#state{hashsign_algorithm = HashSign},
Connection);
false ->
Connection:handle_own_alert(?ALERT_REC(?FATAL, ?DECRYPT_ERROR),
Version, certify, State)
end
end;
certify(internal, #certificate_request{hashsign_algorithms = HashSigns},
#state{session = #session{own_certificate = Cert},
key_algorithm = KeyExAlg,
ssl_options = #ssl_options{signature_algs = SupportedHashSigns},
negotiated_version = Version} = State0, Connection) ->
case ssl_handshake:select_hashsign(HashSigns, Cert, KeyExAlg, SupportedHashSigns, Version) of
#alert {} = Alert ->
Connection:handle_own_alert(Alert, Version, certify, State0);
NegotiatedHashSign ->
{Record, State} = Connection:next_record(State0#state{client_certificate_requested = true}),
Connection:next_event(certify, Record,
State#state{cert_hashsign_algorithm = NegotiatedHashSign})
end;
%% PSK and RSA_PSK might bypass the Server-Key-Exchange
certify(internal, #server_hello_done{},
#state{session = #session{master_secret = undefined},
negotiated_version = Version,
psk_identity = PSKIdentity,
ssl_options = #ssl_options{user_lookup_fun = PSKLookup},
premaster_secret = undefined,
role = client,
key_algorithm = Alg} = State0, Connection)
when Alg == psk ->
case ssl_handshake:premaster_secret({Alg, PSKIdentity}, PSKLookup) of
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, certify, State0);
PremasterSecret ->
State = master_secret(PremasterSecret,
State0#state{premaster_secret = PremasterSecret}),
client_certify_and_key_exchange(State, Connection)
end;
certify(internal, #server_hello_done{},
#state{session = #session{master_secret = undefined},
ssl_options = #ssl_options{user_lookup_fun = PSKLookup},
negotiated_version = {Major, Minor} = Version,
psk_identity = PSKIdentity,
premaster_secret = undefined,
role = client,
key_algorithm = Alg} = State0, Connection)
when Alg == rsa_psk ->
Rand = ssl_cipher:random_bytes(?NUM_OF_PREMASTERSECRET_BYTES-2),
RSAPremasterSecret = <<?BYTE(Major), ?BYTE(Minor), Rand/binary>>,
case ssl_handshake:premaster_secret({Alg, PSKIdentity}, PSKLookup,
RSAPremasterSecret) of
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, certify, State0);
PremasterSecret ->
State = master_secret(PremasterSecret,
State0#state{premaster_secret = RSAPremasterSecret}),
client_certify_and_key_exchange(State, Connection)
end;
%% Master secret was determined with help of server-key exchange msg
certify(internal, #server_hello_done{},
#state{session = #session{master_secret = MasterSecret} = Session,
connection_states = ConnectionStates0,
negotiated_version = Version,
premaster_secret = undefined,
role = client} = State0, Connection) ->
case ssl_handshake:master_secret(record_cb(Connection), Version, Session,
ConnectionStates0, client) of
{MasterSecret, ConnectionStates} ->
State = State0#state{connection_states = ConnectionStates},
client_certify_and_key_exchange(State, Connection);
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, certify, State0)
end;
%% Master secret is calculated from premaster_secret
certify(internal, #server_hello_done{},
#state{session = Session0,
connection_states = ConnectionStates0,
negotiated_version = Version,
premaster_secret = PremasterSecret,
role = client} = State0, Connection) ->
case ssl_handshake:master_secret(record_cb(Connection), Version, PremasterSecret,
ConnectionStates0, client) of
{MasterSecret, ConnectionStates} ->
Session = Session0#session{master_secret = MasterSecret},
State = State0#state{connection_states = ConnectionStates,
session = Session},
client_certify_and_key_exchange(State, Connection);
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, certify, State0)
end;
certify(internal = Type, #client_key_exchange{} = Msg,
#state{role = server,
client_certificate_requested = true,
ssl_options = #ssl_options{fail_if_no_peer_cert = true}} = State,
Connection) ->
%% We expect a certificate here
handle_common_event(Type, Msg, certify, State, Connection);
certify(internal, #client_key_exchange{exchange_keys = Keys},
State = #state{key_algorithm = KeyAlg, negotiated_version = Version}, Connection) ->
try
certify_client_key_exchange(ssl_handshake:decode_client_key(Keys, KeyAlg, Version),
State, Connection)
catch
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, certify, State)
end;
certify(Type, Msg, State, Connection) ->
handle_common_event(Type, Msg, certify, State, Connection).
%%--------------------------------------------------------------------
-spec cipher(gen_statem:event_type(),
#hello_request{} | #certificate_verify{} | #finished{} | term(),
#state{}, tls_connection | dtls_connection) ->
gen_statem:state_function_result().
%%--------------------------------------------------------------------
cipher({call, From}, Msg, State, Connection) ->
handle_call(Msg, From, cipher, State, Connection);
cipher(info, Msg, State, _) ->
handle_info(Msg, cipher, State);
cipher(internal, #certificate_verify{signature = Signature,
hashsign_algorithm = CertHashSign},
#state{role = server,
key_algorithm = KexAlg,
public_key_info = PublicKeyInfo,
negotiated_version = Version,
session = #session{master_secret = MasterSecret},
tls_handshake_history = Handshake
} = State0, Connection) ->
%% Use negotiated value if TLS-1.2 otherwhise return default
HashSign = negotiated_hashsign(CertHashSign, KexAlg, PublicKeyInfo, Version),
case ssl_handshake:certificate_verify(Signature, PublicKeyInfo,
Version, HashSign, MasterSecret, Handshake) of
valid ->
{Record, State} = Connection:next_record(State0),
Connection:next_event(cipher, Record,
State#state{cert_hashsign_algorithm = HashSign});
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, cipher, State0)
end;
%% client must send a next protocol message if we are expecting it
cipher(internal, #finished{},
#state{role = server, expecting_next_protocol_negotiation = true,
negotiated_protocol = undefined, negotiated_version = Version} = State0,
Connection) ->
Connection:handle_own_alert(?ALERT_REC(?FATAL,?UNEXPECTED_MESSAGE), Version, cipher, State0);
cipher(internal, #finished{verify_data = Data} = Finished,
#state{negotiated_version = Version,
host = Host,
port = Port,
role = Role,
expecting_finished = true,
session = #session{master_secret = MasterSecret}
= Session0,
connection_states = ConnectionStates0,
tls_handshake_history = Handshake0} = State, Connection) ->
case ssl_handshake:verify_connection(Version, Finished,
opposite_role(Role),
get_current_prf(ConnectionStates0, read),
MasterSecret, Handshake0) of
verified ->
Session = register_session(Role, Host, Port, Session0),
cipher_role(Role, Data, Session,
State#state{expecting_finished = false}, Connection);
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, cipher, State)
end;
%% only allowed to send next_protocol message after change cipher spec
%% & before finished message and it is not allowed during renegotiation
cipher(internal, #next_protocol{selected_protocol = SelectedProtocol},
#state{role = server, expecting_next_protocol_negotiation = true,
expecting_finished = true} = State0, Connection) ->
{Record, State} =
Connection:next_record(State0#state{negotiated_protocol = SelectedProtocol}),
Connection:next_event(cipher, Record,
State#state{expecting_next_protocol_negotiation = false});
cipher(internal, #change_cipher_spec{type = <<1>>}, #state{connection_states = ConnectionStates0} =
State0, Connection) ->
ConnectionStates1 =
ssl_record:activate_pending_connection_state(ConnectionStates0, read),
{Record, State} = Connection:next_record(State0#state{connection_states =
ConnectionStates1}),
Connection:next_event(cipher, Record, State#state{expecting_finished = true});
cipher(Type, Msg, State, Connection) ->
handle_common_event(Type, Msg, cipher, State, Connection).
%%--------------------------------------------------------------------
-spec connection(gen_statem:event_type(), term(),
#state{}, tls_connection | dtls_connection) ->
gen_statem:state_function_result().
%%--------------------------------------------------------------------
connection({call, From}, {application_data, Data},
#state{protocol_cb = Connection} = State, Connection) ->
%% We should look into having a worker process to do this to
%% parallize send and receive decoding and not block the receiver
%% if sending is overloading the socket.
try
Connection:write_application_data(Data, From, State)
catch throw:Error ->
hibernate_after(connection, State, [{reply, From, Error}])
end;
connection({call, RecvFrom}, {recv, N, Timeout},
#state{protocol_cb = Connection, socket_options =
#socket_options{active = false}} = State0, Connection) ->
Timer = start_or_recv_cancel_timer(Timeout, RecvFrom),
Connection:passive_receive(State0#state{bytes_to_read = N,
start_or_recv_from = RecvFrom,
timer = Timer}, connection);
connection({call, From}, renegotiate, #state{protocol_cb = Connection} = State,
Connection) ->
Connection:renegotiate(State#state{renegotiation = {true, From}}, []);
connection({call, From}, peer_certificate,
#state{session = #session{peer_certificate = Cert}} = State, _) ->
hibernate_after(connection, State, [{reply, From, {ok, Cert}}]);
connection({call, From}, connection_information, State, _) ->
Info = connection_info(State),
hibernate_after(connection, State, [{reply, From, {ok, Info}}]);
connection({call, From}, session_info, #state{session = #session{session_id = Id,
cipher_suite = Suite}} = State, _) ->
SessionInfo = [{session_id, Id},
{cipher_suite, ssl_cipher:erl_suite_definition(Suite)}],
hibernate_after(connection, State, [{reply, From, SessionInfo}]);
connection({call, From}, negotiated_protocol,
#state{negotiated_protocol = undefined} = State, _) ->
hibernate_after(connection, State, [{reply, From, {error, protocol_not_negotiated}}]);
connection({call, From}, negotiated_protocol,
#state{negotiated_protocol = SelectedProtocol} = State, _) ->
hibernate_after(connection, State,
[{reply, From, {ok, SelectedProtocol}}]);
connection({call, From}, Msg, State, Connection) ->
handle_call(Msg, From, connection, State, Connection);
connection(info, Msg, State, _) ->
handle_info(Msg, connection, State);
connection(internal, {recv, _}, State, Connection) ->
Connection:passive_receive(State, connection);
connection(Type, Msg, State, Connection) ->
handle_common_event(Type, Msg, connection, State, Connection).
%%--------------------------------------------------------------------
-spec downgrade(gen_statem:event_type(), term(),
#state{}, tls_connection | dtls_connection) ->
gen_statem:state_function_result().
%%--------------------------------------------------------------------
downgrade(internal, #alert{description = ?CLOSE_NOTIFY},
#state{transport_cb = Transport, socket = Socket,
downgrade = {Pid, From}} = State, _) ->
ssl_socket:setopts(Transport, Socket, [{active, false}, {packet, 0}, {mode, binary}]),
Transport:controlling_process(Socket, Pid),
gen_statem:reply(From, {ok, Socket}),
{stop, normal, State};
downgrade(timeout, downgrade, #state{downgrade = {_, From}} = State, _) ->
gen_statem:reply(From, {error, timeout}),
{stop, normal, State};
downgrade(Type, Event, State, Connection) ->
handle_common_event(Type, Event, downgrade, State, Connection).
%%--------------------------------------------------------------------
%% Event handling functions called by state functions to handle
%% common or unexpected events for the state.
%%--------------------------------------------------------------------
handle_common_event(internal, {handshake, {#hello_request{} = Handshake, _}}, connection = StateName,
#state{role = client} = State, _) ->
%% Should not be included in handshake history
{next_state, StateName, State#state{renegotiation = {true, peer}}, [{next_event, internal, Handshake}]};
handle_common_event(internal, {handshake, {#hello_request{}, _}}, StateName, #state{role = client}, _)
when StateName =/= connection ->
{keep_state_and_data};
handle_common_event(internal, {handshake, {Handshake, Raw}}, StateName,
#state{tls_handshake_history = Hs0} = State0, Connection) ->
%% This function handles client SNI hello extension when Handshake is
%% a client_hello, which needs to be determined by the connection callback.
%% In other cases this is a noop
State = Connection:handle_sni_extension(Handshake, State0),
HsHist = ssl_handshake:update_handshake_history(Hs0, Raw),
{next_state, StateName, State#state{tls_handshake_history = HsHist},
[{next_event, internal, Handshake}]};
handle_common_event(internal, {tls_record, TLSRecord}, StateName, State, Connection) ->
Connection:handle_common_event(internal, TLSRecord, StateName, State);
handle_common_event(timeout, hibernate, _, _, _) ->
{keep_state_and_data, [hibernate]};
handle_common_event(internal, {application_data, Data}, StateName, State0, Connection) ->
case Connection:read_application_data(Data, State0) of
{stop, Reason, State} ->
{stop, Reason, State};
{Record, State} ->
Connection:next_event(StateName, Record, State)
end;
handle_common_event(internal, #change_cipher_spec{type = <<1>>}, StateName,
#state{negotiated_version = Version} = State, Connection) ->
Connection:handle_own_alert(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE), Version,
StateName, State);
handle_common_event(internal, _, _, _, _) ->
{keep_state_and_data, [postpone]};
handle_common_event(_Type, Msg, StateName, #state{negotiated_version = Version} = State,
Connection) ->
Alert = ?ALERT_REC(?FATAL,?UNEXPECTED_MESSAGE),
Connection:handle_own_alert(Alert, Version, {StateName, Msg}, State).
handle_call({application_data, _Data}, _, _, _, _) ->
%% In renegotiation priorities handshake, send data when handshake is finished
{keep_state_and_data, [postpone]};
handle_call({close, {Pid, Timeout}}, From, StateName, State0, Connection) when is_pid(Pid) ->
%% terminate will send close alert to peer
State = State0#state{downgrade = {Pid, From}},
Connection:terminate(downgrade, StateName, State),
%% User downgrades connection
%% When downgrading an TLS connection to a transport connection
%% we must recive the close alert from the peer before releasing the
%% transport socket.
{next_state, downgrade, State, [{timeout, Timeout, downgrade}]};
handle_call({close, _} = Close, From, StateName, State, Connection) ->
%% Run terminate before returning so that the reuseaddr
%% inet-option
Result = Connection:terminate(Close, StateName, State),
{stop_and_reply, {shutdown, normal},
{reply, From, Result}, State};
handle_call({shutdown, How0}, From, _,
#state{transport_cb = Transport,
negotiated_version = Version,
connection_states = ConnectionStates,
socket = Socket}, _) ->
case How0 of
How when How == write; How == both ->
Alert = ?ALERT_REC(?WARNING, ?CLOSE_NOTIFY),
{BinMsg, _} =
ssl_alert:encode(Alert, Version, ConnectionStates),
Transport:send(Socket, BinMsg);
_ ->
ok
end,
case Transport:shutdown(Socket, How0) of
ok ->
{keep_state_and_data, [{reply, From, ok}]};
Error ->
gen_statem:reply(From, {error, Error}),
{stop, normal}
end;
handle_call({recv, _N, _Timeout}, From, _,
#state{socket_options =
#socket_options{active = Active}}, _) when Active =/= false ->
{keep_state_and_data, [{reply, From, {error, einval}}]};
handle_call({recv, N, Timeout}, RecvFrom, StateName, State, _) ->
%% Doing renegotiate wait with handling request until renegotiate is
%% finished.
Timer = start_or_recv_cancel_timer(Timeout, RecvFrom),
{next_state, StateName, State#state{bytes_to_read = N, start_or_recv_from = RecvFrom,
timer = Timer},
[{next_event, internal, {recv, RecvFrom}}]};
handle_call({new_user, User}, From, StateName,
State =#state{user_application = {OldMon, _}}, _) ->
NewMon = erlang:monitor(process, User),
erlang:demonitor(OldMon, [flush]),
{next_state, StateName, State#state{user_application = {NewMon,User}},
[{reply, From, ok}]};
handle_call({get_opts, OptTags}, From, _,
#state{socket = Socket,
transport_cb = Transport,
socket_options = SockOpts}, _) ->
OptsReply = get_socket_opts(Transport, Socket, OptTags, SockOpts, []),
{keep_state_and_data, [{reply, From, OptsReply}]};
handle_call({set_opts, Opts0}, From, StateName,
#state{socket_options = Opts1,
socket = Socket,
transport_cb = Transport} = State0, _) ->
{Reply, Opts} = set_socket_opts(Transport, Socket, Opts0, Opts1, []),
State = State0#state{socket_options = Opts},
handle_active_option(Opts#socket_options.active, StateName, From, Reply, State);
handle_call(renegotiate, From, StateName, _, _) when StateName =/= connection ->
{keep_state_and_data, [{reply, From, {error, already_renegotiating}}]};
handle_call({prf, Secret, Label, Seed, WantedLength}, From, _,
#state{connection_states = ConnectionStates,
negotiated_version = Version}, _) ->
ConnectionState =
ssl_record:current_connection_state(ConnectionStates, read),
SecParams = ConnectionState#connection_state.security_parameters,
#security_parameters{master_secret = MasterSecret,
client_random = ClientRandom,
server_random = ServerRandom,
prf_algorithm = PRFAlgorithm} = SecParams,
Reply = try
SecretToUse = case Secret of
_ when is_binary(Secret) -> Secret;
master_secret -> MasterSecret
end,
SeedToUse = lists:reverse(
lists:foldl(fun(X, Acc) when is_binary(X) -> [X|Acc];
(client_random, Acc) -> [ClientRandom|Acc];
(server_random, Acc) -> [ServerRandom|Acc]
end, [], Seed)),
ssl_handshake:prf(Version, PRFAlgorithm, SecretToUse, Label, SeedToUse, WantedLength)
catch
exit:_ -> {error, badarg};
error:Reason -> {error, Reason}
end,
{keep_state_and_data, [{reply, From, Reply}]};
handle_call(_,_,_,_,_) ->
{keep_state_and_data, [postpone]}.
handle_info({ErrorTag, Socket, econnaborted}, StateName,
#state{socket = Socket, transport_cb = Transport,
start_or_recv_from = StartFrom, role = Role,
protocol_cb = Connection,
error_tag = ErrorTag,
tracker = Tracker} = State) when StateName =/= connection ->
Connection:alert_user(Transport, Tracker,Socket,
StartFrom, ?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), Role),
{stop, normal, State};
handle_info({ErrorTag, Socket, Reason}, StateName, #state{socket = Socket,
protocol_cb = Connection,
error_tag = ErrorTag} = State) ->
Report = io_lib:format("SSL: Socket error: ~p ~n", [Reason]),
error_logger:info_report(Report),
Connection:handle_normal_shutdown(?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), StateName, State),
{stop, normal, State};
handle_info({'DOWN', MonitorRef, _, _, _}, _,
State = #state{user_application={MonitorRef,_Pid}}) ->
{stop, normal, State};
%%% So that terminate will be run when supervisor issues shutdown
handle_info({'EXIT', _Sup, shutdown}, _StateName, State) ->
{stop, shutdown, State};
handle_info({'EXIT', Socket, normal}, _StateName, #state{socket = Socket} = State) ->
%% Handle as transport close"
{stop, {shutdown, transport_closed}, State};
handle_info(allow_renegotiate, StateName, State) ->
{next_state, StateName, State#state{allow_renegotiate = true}};
handle_info({cancel_start_or_recv, StartFrom}, StateName,
#state{renegotiation = {false, first}} = State) when StateName =/= connection ->
{stop_and_reply, {shutdown, user_timeout},
{reply, StartFrom, {error, timeout}}, State#state{timer = undefined}};
handle_info({cancel_start_or_recv, RecvFrom}, StateName,
#state{start_or_recv_from = RecvFrom} = State) when RecvFrom =/= undefined ->
{next_state, StateName, State#state{start_or_recv_from = undefined,
bytes_to_read = undefined,
timer = undefined}, [{reply, RecvFrom, {error, timeout}}]};
handle_info({cancel_start_or_recv, _RecvFrom}, StateName, State) ->
{next_state, StateName, State#state{timer = undefined}};
handle_info(Msg, StateName, #state{socket = Socket, error_tag = Tag} = State) ->
Report = io_lib:format("SSL: Got unexpected info: ~p ~n", [{Msg, Tag, Socket}]),
error_logger:info_report(Report),
{next_state, StateName, State}.
%%--------------------------------------------------------------------
%% gen_statem callbacks
%%--------------------------------------------------------------------
terminate(_, _, #state{terminated = true}) ->
%% Happens when user closes the connection using ssl:close/1
%% we want to guarantee that Transport:close has been called
%% when ssl:close/1 returns.
ok;
terminate({shutdown, transport_closed} = Reason,
_StateName, #state{protocol_cb = Connection,
socket = Socket, transport_cb = Transport} = State) ->
handle_trusted_certs_db(State),
Connection:close(Reason, Socket, Transport, undefined, undefined);
terminate({shutdown, own_alert}, _StateName, #state{%%send_queue = SendQueue,
protocol_cb = Connection,
socket = Socket,
transport_cb = Transport} = State) ->
handle_trusted_certs_db(State),
case application:get_env(ssl, alert_timeout) of
{ok, Timeout} when is_integer(Timeout) ->
Connection:close({timeout, Timeout}, Socket, Transport, undefined, undefined);
_ ->
Connection:close({timeout, ?DEFAULT_TIMEOUT}, Socket, Transport, undefined, undefined)
end;
terminate(Reason, connection, #state{negotiated_version = Version,
protocol_cb = Connection,
connection_states = ConnectionStates0,
ssl_options = #ssl_options{padding_check = Check},
transport_cb = Transport, socket = Socket
} = State) ->
handle_trusted_certs_db(State),
{BinAlert, ConnectionStates} = terminate_alert(Reason, Version, ConnectionStates0),
Transport:send(Socket, BinAlert),
Connection:close(Reason, Socket, Transport, ConnectionStates, Check);
terminate(Reason, _StateName, #state{transport_cb = Transport, protocol_cb = Connection,
socket = Socket
} = State) ->
handle_trusted_certs_db(State),
Connection:close(Reason, Socket, Transport, undefined, undefined).
format_status(normal, [_, StateName, State]) ->
[{data, [{"State", {StateName, State}}]}];
format_status(terminate, [_, StateName, State]) ->
SslOptions = (State#state.ssl_options),
NewOptions = SslOptions#ssl_options{password = ?SECRET_PRINTOUT,
cert = ?SECRET_PRINTOUT,
cacerts = ?SECRET_PRINTOUT,
key = ?SECRET_PRINTOUT,
dh = ?SECRET_PRINTOUT,
psk_identity = ?SECRET_PRINTOUT,
srp_identity = ?SECRET_PRINTOUT},
[{data, [{"State", {StateName, State#state{connection_states = ?SECRET_PRINTOUT,
protocol_buffers = ?SECRET_PRINTOUT,
user_data_buffer = ?SECRET_PRINTOUT,
tls_handshake_history = ?SECRET_PRINTOUT,
session = ?SECRET_PRINTOUT,
private_key = ?SECRET_PRINTOUT,
diffie_hellman_params = ?SECRET_PRINTOUT,
diffie_hellman_keys = ?SECRET_PRINTOUT,
srp_params = ?SECRET_PRINTOUT,
srp_keys = ?SECRET_PRINTOUT,
premaster_secret = ?SECRET_PRINTOUT,
ssl_options = NewOptions}
}}]}].
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
connection_info(#state{sni_hostname = SNIHostname,
session = #session{cipher_suite = CipherSuite},
negotiated_version = Version, ssl_options = Opts}) ->
[{protocol, tls_record:protocol_version(Version)},
{cipher_suite, ssl_cipher:erl_suite_definition(CipherSuite)},
{sni_hostname, SNIHostname}] ++ ssl_options_list(Opts).
do_server_hello(Type, #hello_extensions{next_protocol_negotiation = NextProtocols} =
ServerHelloExt,
#state{negotiated_version = Version,
session = #session{session_id = SessId},
connection_states = ConnectionStates0}
= State0, Connection) when is_atom(Type) ->
ServerHello =
ssl_handshake:server_hello(SessId, Version, ConnectionStates0, ServerHelloExt),
State = server_hello(ServerHello,
State0#state{expecting_next_protocol_negotiation =
NextProtocols =/= undefined}, Connection),
case Type of
new ->
new_server_hello(ServerHello, State, Connection);
resumed ->
resumed_server_hello(State, Connection)
end.
new_server_hello(#server_hello{cipher_suite = CipherSuite,
compression_method = Compression,
session_id = SessionId},
#state{session = Session0,
negotiated_version = Version} = State0, Connection) ->
try server_certify_and_key_exchange(State0, Connection) of
#state{} = State1 ->
State2 = server_hello_done(State1, Connection),
Session =
Session0#session{session_id = SessionId,
cipher_suite = CipherSuite,
compression_method = Compression},
{Record, State} = Connection:next_record(State2#state{session = Session}),
Connection:next_event(certify, Record, State)
catch
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, hello, State0)
end.
resumed_server_hello(#state{session = Session,
connection_states = ConnectionStates0,
negotiated_version = Version} = State0, Connection) ->
case ssl_handshake:master_secret(record_cb(Connection), Version, Session,
ConnectionStates0, server) of
{_, ConnectionStates1} ->
State1 = State0#state{connection_states = ConnectionStates1,
session = Session},
State2 =
finalize_handshake(State1, abbreviated, Connection),
{Record, State} = Connection:next_record(State2),
Connection:next_event(abbreviated, Record, State);
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, hello, State0)
end.
server_hello(ServerHello, State0, Connection) ->
CipherSuite = ServerHello#server_hello.cipher_suite,
{KeyAlgorithm, _, _, _} = ssl_cipher:suite_definition(CipherSuite),
State = Connection:send_handshake(ServerHello, State0),
State#state{key_algorithm = KeyAlgorithm}.
server_hello_done(State, Connection) ->
HelloDone = ssl_handshake:server_hello_done(),
Connection:send_handshake(HelloDone, State).
handle_peer_cert(Role, PeerCert, PublicKeyInfo,
#state{session = #session{cipher_suite = CipherSuite} = Session} = State0,
Connection) ->
State1 = State0#state{session =
Session#session{peer_certificate = PeerCert},
public_key_info = PublicKeyInfo},
{KeyAlg,_,_,_} = ssl_cipher:suite_definition(CipherSuite),
State2 = handle_peer_cert_key(Role, PeerCert, PublicKeyInfo, KeyAlg, State1),
{Record, State} = Connection:next_record(State2),
Connection:next_event(certify, Record, State).
handle_peer_cert_key(client, _,
{?'id-ecPublicKey', #'ECPoint'{point = _ECPoint} = PublicKey,
PublicKeyParams},
KeyAlg, State) when KeyAlg == ecdh_rsa;
KeyAlg == ecdh_ecdsa ->
ECDHKey = public_key:generate_key(PublicKeyParams),
PremasterSecret = ssl_handshake:premaster_secret(PublicKey, ECDHKey),
master_secret(PremasterSecret, State#state{diffie_hellman_keys = ECDHKey});
%% We do currently not support cipher suites that use fixed DH.
%% If we want to implement that the following clause can be used
%% to extract DH parameters form cert.
%% handle_peer_cert_key(client, _PeerCert, {?dhpublicnumber, PublicKey, PublicKeyParams},
%% {_,SignAlg},
%% #state{diffie_hellman_keys = {_, MyPrivatKey}} = State) when
%% SignAlg == dh_rsa;
%% SignAlg == dh_dss ->
%% dh_master_secret(PublicKeyParams, PublicKey, MyPrivatKey, State);
handle_peer_cert_key(_, _, _, _, State) ->
State.
certify_client(#state{client_certificate_requested = true, role = client,
cert_db = CertDbHandle,
cert_db_ref = CertDbRef,
session = #session{own_certificate = OwnCert}}
= State, Connection) ->
Certificate = ssl_handshake:certificate(OwnCert, CertDbHandle, CertDbRef, client),
Connection:send_handshake(Certificate, State);
certify_client(#state{client_certificate_requested = false} = State, _) ->
State.
verify_client_cert(#state{client_certificate_requested = true, role = client,
negotiated_version = Version,
private_key = PrivateKey,
session = #session{master_secret = MasterSecret,
own_certificate = OwnCert},
cert_hashsign_algorithm = HashSign,
tls_handshake_history = Handshake0} = State, Connection) ->
case ssl_handshake:client_certificate_verify(OwnCert, MasterSecret,
Version, HashSign, PrivateKey, Handshake0) of
#certificate_verify{} = Verified ->
Connection:send_handshake(Verified, State);
ignore ->
State;
#alert{} = Alert ->
throw(Alert)
end;
verify_client_cert(#state{client_certificate_requested = false} = State, _) ->
State.
client_certify_and_key_exchange(#state{negotiated_version = Version} =
State0, Connection) ->
try do_client_certify_and_key_exchange(State0, Connection) of
State1 = #state{} ->
State2 = finalize_handshake(State1, certify, Connection),
State3 = State2#state{
%% Reinitialize
client_certificate_requested = false},
{Record, State} = Connection:next_record(State3),
Connection:next_event(cipher, Record, State)
catch
throw:#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, certify, State0)
end.
do_client_certify_and_key_exchange(State0, Connection) ->
State1 = certify_client(State0, Connection),
State2 = key_exchange(State1, Connection),
verify_client_cert(State2, Connection).
server_certify_and_key_exchange(State0, Connection) ->
State1 = certify_server(State0, Connection),
State2 = key_exchange(State1, Connection),
request_client_cert(State2, Connection).
certify_client_key_exchange(#encrypted_premaster_secret{premaster_secret= EncPMS},
#state{private_key = Key} = State, Connection) ->
PremasterSecret = ssl_handshake:premaster_secret(EncPMS, Key),
calculate_master_secret(PremasterSecret, State, Connection, certify, cipher);
certify_client_key_exchange(#client_diffie_hellman_public{dh_public = ClientPublicDhKey},
#state{diffie_hellman_params = #'DHParameter'{} = Params,
diffie_hellman_keys = {_, ServerDhPrivateKey}} = State,
Connection) ->
PremasterSecret = ssl_handshake:premaster_secret(ClientPublicDhKey, ServerDhPrivateKey, Params),
calculate_master_secret(PremasterSecret, State, Connection, certify, cipher);
certify_client_key_exchange(#client_ec_diffie_hellman_public{dh_public = ClientPublicEcDhPoint},
#state{diffie_hellman_keys = ECDHKey} = State, Connection) ->
PremasterSecret = ssl_handshake:premaster_secret(#'ECPoint'{point = ClientPublicEcDhPoint}, ECDHKey),
calculate_master_secret(PremasterSecret, State, Connection, certify, cipher);
certify_client_key_exchange(#client_psk_identity{} = ClientKey,
#state{ssl_options =
#ssl_options{user_lookup_fun = PSKLookup}} = State0,
Connection) ->
PremasterSecret = ssl_handshake:premaster_secret(ClientKey, PSKLookup),
calculate_master_secret(PremasterSecret, State0, Connection, certify, cipher);
certify_client_key_exchange(#client_dhe_psk_identity{} = ClientKey,
#state{diffie_hellman_params = #'DHParameter'{} = Params,
diffie_hellman_keys = {_, ServerDhPrivateKey},
ssl_options =
#ssl_options{user_lookup_fun = PSKLookup}} = State0,
Connection) ->
PremasterSecret =
ssl_handshake:premaster_secret(ClientKey, ServerDhPrivateKey, Params, PSKLookup),
calculate_master_secret(PremasterSecret, State0, Connection, certify, cipher);
certify_client_key_exchange(#client_rsa_psk_identity{} = ClientKey,
#state{private_key = Key,
ssl_options =
#ssl_options{user_lookup_fun = PSKLookup}} = State0,
Connection) ->
PremasterSecret = ssl_handshake:premaster_secret(ClientKey, Key, PSKLookup),
calculate_master_secret(PremasterSecret, State0, Connection, certify, cipher);
certify_client_key_exchange(#client_srp_public{} = ClientKey,
#state{srp_params = Params,
srp_keys = Key
} = State0, Connection) ->
PremasterSecret = ssl_handshake:premaster_secret(ClientKey, Key, Params),
calculate_master_secret(PremasterSecret, State0, Connection, certify, cipher).
certify_server(#state{key_algorithm = Algo} = State, _) when Algo == dh_anon;
Algo == ecdh_anon;
Algo == psk;
Algo == dhe_psk;
Algo == srp_anon ->
State;
certify_server(#state{cert_db = CertDbHandle,
cert_db_ref = CertDbRef,
session = #session{own_certificate = OwnCert}} = State, Connection) ->
case ssl_handshake:certificate(OwnCert, CertDbHandle, CertDbRef, server) of
Cert = #certificate{} ->
Connection:send_handshake(Cert, State);
Alert = #alert{} ->
throw(Alert)
end.
key_exchange(#state{role = server, key_algorithm = rsa} = State,_) ->
State;
key_exchange(#state{role = server, key_algorithm = Algo,
hashsign_algorithm = HashSignAlgo,
diffie_hellman_params = #'DHParameter'{} = Params,
private_key = PrivateKey,
connection_states = ConnectionStates0,
negotiated_version = Version
} = State0, Connection)
when Algo == dhe_dss;
Algo == dhe_rsa;
Algo == dh_anon ->
DHKeys = public_key:generate_key(Params),
ConnectionState =
ssl_record:pending_connection_state(ConnectionStates0, read),
SecParams = ConnectionState#connection_state.security_parameters,
#security_parameters{client_random = ClientRandom,
server_random = ServerRandom} = SecParams,
Msg = ssl_handshake:key_exchange(server, Version, {dh, DHKeys, Params,
HashSignAlgo, ClientRandom,
ServerRandom,
PrivateKey}),
State = Connection:send_handshake(Msg, State0),
State#state{diffie_hellman_keys = DHKeys};
key_exchange(#state{role = server, private_key = Key, key_algorithm = Algo} = State, _)
when Algo == ecdh_ecdsa; Algo == ecdh_rsa ->
State#state{diffie_hellman_keys = Key};
key_exchange(#state{role = server, key_algorithm = Algo,
hashsign_algorithm = HashSignAlgo,
private_key = PrivateKey,
connection_states = ConnectionStates0,
negotiated_version = Version
} = State0, Connection)
when Algo == ecdhe_ecdsa; Algo == ecdhe_rsa;
Algo == ecdh_anon ->
ECDHKeys = public_key:generate_key(select_curve(State0)),
ConnectionState =
ssl_record:pending_connection_state(ConnectionStates0, read),
SecParams = ConnectionState#connection_state.security_parameters,
#security_parameters{client_random = ClientRandom,
server_random = ServerRandom} = SecParams,
Msg = ssl_handshake:key_exchange(server, Version, {ecdh, ECDHKeys,
HashSignAlgo, ClientRandom,
ServerRandom,
PrivateKey}),
State = Connection:send_handshake(Msg, State0),
State#state{diffie_hellman_keys = ECDHKeys};
key_exchange(#state{role = server, key_algorithm = psk,
ssl_options = #ssl_options{psk_identity = undefined}} = State, _) ->
State;
key_exchange(#state{role = server, key_algorithm = psk,
ssl_options = #ssl_options{psk_identity = PskIdentityHint},
hashsign_algorithm = HashSignAlgo,
private_key = PrivateKey,
connection_states = ConnectionStates0,
negotiated_version = Version
} = State0, Connection) ->
ConnectionState =
ssl_record:pending_connection_state(ConnectionStates0, read),
SecParams = ConnectionState#connection_state.security_parameters,
#security_parameters{client_random = ClientRandom,
server_random = ServerRandom} = SecParams,
Msg = ssl_handshake:key_exchange(server, Version, {psk, PskIdentityHint,
HashSignAlgo, ClientRandom,
ServerRandom,
PrivateKey}),
Connection:send_handshake(Msg, State0);
key_exchange(#state{role = server, key_algorithm = dhe_psk,
ssl_options = #ssl_options{psk_identity = PskIdentityHint},
hashsign_algorithm = HashSignAlgo,
diffie_hellman_params = #'DHParameter'{} = Params,
private_key = PrivateKey,
connection_states = ConnectionStates0,
negotiated_version = Version
} = State0, Connection) ->
DHKeys = public_key:generate_key(Params),
ConnectionState =
ssl_record:pending_connection_state(ConnectionStates0, read),
SecParams = ConnectionState#connection_state.security_parameters,
#security_parameters{client_random = ClientRandom,
server_random = ServerRandom} = SecParams,
Msg = ssl_handshake:key_exchange(server, Version, {dhe_psk,
PskIdentityHint, DHKeys, Params,
HashSignAlgo, ClientRandom,
ServerRandom,
PrivateKey}),
State = Connection:send_handshake(Msg, State0),
State#state{diffie_hellman_keys = DHKeys};
key_exchange(#state{role = server, key_algorithm = rsa_psk,
ssl_options = #ssl_options{psk_identity = undefined}} = State, _) ->
State;
key_exchange(#state{role = server, key_algorithm = rsa_psk,
ssl_options = #ssl_options{psk_identity = PskIdentityHint},
hashsign_algorithm = HashSignAlgo,
private_key = PrivateKey,
connection_states = ConnectionStates0,
negotiated_version = Version
} = State0, Connection) ->
ConnectionState =
ssl_record:pending_connection_state(ConnectionStates0, read),
SecParams = ConnectionState#connection_state.security_parameters,
#security_parameters{client_random = ClientRandom,
server_random = ServerRandom} = SecParams,
Msg = ssl_handshake:key_exchange(server, Version, {psk, PskIdentityHint,
HashSignAlgo, ClientRandom,
ServerRandom,
PrivateKey}),
Connection:send_handshake(Msg, State0);
key_exchange(#state{role = server, key_algorithm = Algo,
ssl_options = #ssl_options{user_lookup_fun = LookupFun},
hashsign_algorithm = HashSignAlgo,
session = #session{srp_username = Username},
private_key = PrivateKey,
connection_states = ConnectionStates0,
negotiated_version = Version
} = State0, Connection)
when Algo == srp_dss;
Algo == srp_rsa;
Algo == srp_anon ->
SrpParams = handle_srp_identity(Username, LookupFun),
Keys = case generate_srp_server_keys(SrpParams, 0) of
Alert = #alert{} ->
throw(Alert);
Keys0 = {_,_} ->
Keys0
end,
ConnectionState =
ssl_record:pending_connection_state(ConnectionStates0, read),
SecParams = ConnectionState#connection_state.security_parameters,
#security_parameters{client_random = ClientRandom,
server_random = ServerRandom} = SecParams,
Msg = ssl_handshake:key_exchange(server, Version, {srp, Keys, SrpParams,
HashSignAlgo, ClientRandom,
ServerRandom,
PrivateKey}),
State = Connection:send_handshake(Msg, State0),
State#state{srp_params = SrpParams,
srp_keys = Keys};
key_exchange(#state{role = client,
key_algorithm = rsa,
public_key_info = PublicKeyInfo,
negotiated_version = Version,
premaster_secret = PremasterSecret} = State0, Connection) ->
Msg = rsa_key_exchange(Version, PremasterSecret, PublicKeyInfo),
Connection:send_handshake(Msg, State0);
key_exchange(#state{role = client,
key_algorithm = Algorithm,
negotiated_version = Version,
diffie_hellman_keys = {DhPubKey, _}
} = State0, Connection)
when Algorithm == dhe_dss;
Algorithm == dhe_rsa;
Algorithm == dh_anon ->
Msg = ssl_handshake:key_exchange(client, Version, {dh, DhPubKey}),
Connection:send_handshake(Msg, State0);
key_exchange(#state{role = client,
key_algorithm = Algorithm,
negotiated_version = Version,
diffie_hellman_keys = Keys} = State0, Connection)
when Algorithm == ecdhe_ecdsa; Algorithm == ecdhe_rsa;
Algorithm == ecdh_ecdsa; Algorithm == ecdh_rsa;
Algorithm == ecdh_anon ->
Msg = ssl_handshake:key_exchange(client, Version, {ecdh, Keys}),
Connection:send_handshake(Msg, State0);
key_exchange(#state{role = client,
ssl_options = SslOpts,
key_algorithm = psk,
negotiated_version = Version} = State0, Connection) ->
Msg = ssl_handshake:key_exchange(client, Version,
{psk, SslOpts#ssl_options.psk_identity}),
Connection:send_handshake(Msg, State0);
key_exchange(#state{role = client,
ssl_options = SslOpts,
key_algorithm = dhe_psk,
negotiated_version = Version,
diffie_hellman_keys = {DhPubKey, _}} = State0, Connection) ->
Msg = ssl_handshake:key_exchange(client, Version,
{dhe_psk,
SslOpts#ssl_options.psk_identity, DhPubKey}),
Connection:send_handshake(Msg, State0);
key_exchange(#state{role = client,
ssl_options = SslOpts,
key_algorithm = rsa_psk,
public_key_info = PublicKeyInfo,
negotiated_version = Version,
premaster_secret = PremasterSecret}
= State0, Connection) ->
Msg = rsa_psk_key_exchange(Version, SslOpts#ssl_options.psk_identity,
PremasterSecret, PublicKeyInfo),
Connection:send_handshake(Msg, State0);
key_exchange(#state{role = client,
key_algorithm = Algorithm,
negotiated_version = Version,
srp_keys = {ClientPubKey, _}}
= State0, Connection)
when Algorithm == srp_dss;
Algorithm == srp_rsa;
Algorithm == srp_anon ->
Msg = ssl_handshake:key_exchange(client, Version, {srp, ClientPubKey}),
Connection:send_handshake(Msg, State0).
rsa_key_exchange(Version, PremasterSecret, PublicKeyInfo = {Algorithm, _, _})
when Algorithm == ?rsaEncryption;
Algorithm == ?md2WithRSAEncryption;
Algorithm == ?md5WithRSAEncryption;
Algorithm == ?sha1WithRSAEncryption;
Algorithm == ?sha224WithRSAEncryption;
Algorithm == ?sha256WithRSAEncryption;
Algorithm == ?sha384WithRSAEncryption;
Algorithm == ?sha512WithRSAEncryption
->
ssl_handshake:key_exchange(client, Version,
{premaster_secret, PremasterSecret,
PublicKeyInfo});
rsa_key_exchange(_, _, _) ->
throw (?ALERT_REC(?FATAL,?HANDSHAKE_FAILURE, pub_key_is_not_rsa)).
rsa_psk_key_exchange(Version, PskIdentity, PremasterSecret,
PublicKeyInfo = {Algorithm, _, _})
when Algorithm == ?rsaEncryption;
Algorithm == ?md2WithRSAEncryption;
Algorithm == ?md5WithRSAEncryption;
Algorithm == ?sha1WithRSAEncryption;
Algorithm == ?sha224WithRSAEncryption;
Algorithm == ?sha256WithRSAEncryption;
Algorithm == ?sha384WithRSAEncryption;
Algorithm == ?sha512WithRSAEncryption
->
ssl_handshake:key_exchange(client, Version,
{psk_premaster_secret, PskIdentity, PremasterSecret,
PublicKeyInfo});
rsa_psk_key_exchange(_, _, _, _) ->
throw (?ALERT_REC(?FATAL,?HANDSHAKE_FAILURE, pub_key_is_not_rsa)).
request_client_cert(#state{ssl_options = #ssl_options{verify = verify_peer,
signature_algs = SupportedHashSigns},
connection_states = ConnectionStates0,
cert_db = CertDbHandle,
cert_db_ref = CertDbRef,
negotiated_version = Version} = State0, Connection) ->
#connection_state{security_parameters =
#security_parameters{cipher_suite = CipherSuite}} =
ssl_record:pending_connection_state(ConnectionStates0, read),
HashSigns = ssl_handshake:available_signature_algs(SupportedHashSigns, Version, [Version]),
Msg = ssl_handshake:certificate_request(CipherSuite, CertDbHandle, CertDbRef,
HashSigns, Version),
State = Connection:send_handshake(Msg, State0),
State#state{client_certificate_requested = true};
request_client_cert(#state{ssl_options = #ssl_options{verify = verify_none}} =
State, _) ->
State.
calculate_master_secret(PremasterSecret,
#state{negotiated_version = Version,
connection_states = ConnectionStates0,
session = Session0} = State0, Connection,
_Current, Next) ->
case ssl_handshake:master_secret(record_cb(Connection), Version, PremasterSecret,
ConnectionStates0, server) of
{MasterSecret, ConnectionStates} ->
Session = Session0#session{master_secret = MasterSecret},
State1 = State0#state{connection_states = ConnectionStates,
session = Session},
{Record, State} = Connection:next_record(State1),
Connection:next_event(Next, Record, State);
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, certify, State0)
end.
finalize_handshake(State0, StateName, Connection) ->
#state{connection_states = ConnectionStates0} =
State1 = cipher_protocol(State0, Connection),
ConnectionStates =
ssl_record:activate_pending_connection_state(ConnectionStates0,
write),
State2 = State1#state{connection_states = ConnectionStates},
State = next_protocol(State2, Connection),
finished(State, StateName, Connection).
next_protocol(#state{role = server} = State, _) ->
State;
next_protocol(#state{negotiated_protocol = undefined} = State, _) ->
State;
next_protocol(#state{expecting_next_protocol_negotiation = false} = State, _) ->
State;
next_protocol(#state{negotiated_protocol = NextProtocol} = State0, Connection) ->
NextProtocolMessage = ssl_handshake:next_protocol(NextProtocol),
Connection:send_handshake(NextProtocolMessage, State0).
cipher_protocol(State, Connection) ->
Connection:send_change_cipher(#change_cipher_spec{}, State).
finished(#state{role = Role, negotiated_version = Version,
session = Session,
connection_states = ConnectionStates0,
tls_handshake_history = Handshake0} = State0, StateName, Connection) ->
MasterSecret = Session#session.master_secret,
Finished = ssl_handshake:finished(Version, Role,
get_current_prf(ConnectionStates0, write),
MasterSecret, Handshake0),
ConnectionStates = save_verify_data(Role, Finished, ConnectionStates0, StateName),
Connection:send_handshake(Finished, State0#state{connection_states =
ConnectionStates}).
save_verify_data(client, #finished{verify_data = Data}, ConnectionStates, certify) ->
ssl_record:set_client_verify_data(current_write, Data, ConnectionStates);
save_verify_data(server, #finished{verify_data = Data}, ConnectionStates, cipher) ->
ssl_record:set_server_verify_data(current_both, Data, ConnectionStates);
save_verify_data(client, #finished{verify_data = Data}, ConnectionStates, abbreviated) ->
ssl_record:set_client_verify_data(current_both, Data, ConnectionStates);
save_verify_data(server, #finished{verify_data = Data}, ConnectionStates, abbreviated) ->
ssl_record:set_server_verify_data(current_write, Data, ConnectionStates).
calculate_secret(#server_dh_params{dh_p = Prime, dh_g = Base,
dh_y = ServerPublicDhKey} = Params,
State, Connection) ->
Keys = {_, PrivateDhKey} = crypto:generate_key(dh, [Prime, Base]),
PremasterSecret =
ssl_handshake:premaster_secret(ServerPublicDhKey, PrivateDhKey, Params),
calculate_master_secret(PremasterSecret,
State#state{diffie_hellman_keys = Keys},
Connection, certify, certify);
calculate_secret(#server_ecdh_params{curve = ECCurve, public = ECServerPubKey},
State, Connection) ->
ECDHKeys = public_key:generate_key(ECCurve),
PremasterSecret =
ssl_handshake:premaster_secret(#'ECPoint'{point = ECServerPubKey}, ECDHKeys),
calculate_master_secret(PremasterSecret,
State#state{diffie_hellman_keys = ECDHKeys},
Connection, certify, certify);
calculate_secret(#server_psk_params{
hint = IdentityHint},
State0, Connection) ->
%% store for later use
{Record, State} = Connection:next_record(State0#state{psk_identity = IdentityHint}),
Connection:next_event(certify, Record, State);
calculate_secret(#server_dhe_psk_params{
dh_params = #server_dh_params{dh_p = Prime, dh_g = Base}} = ServerKey,
#state{ssl_options = #ssl_options{user_lookup_fun = PSKLookup}} =
State, Connection) ->
Keys = {_, PrivateDhKey} =
crypto:generate_key(dh, [Prime, Base]),
PremasterSecret = ssl_handshake:premaster_secret(ServerKey, PrivateDhKey, PSKLookup),
calculate_master_secret(PremasterSecret, State#state{diffie_hellman_keys = Keys},
Connection, certify, certify);
calculate_secret(#server_srp_params{srp_n = Prime, srp_g = Generator} = ServerKey,
#state{ssl_options = #ssl_options{srp_identity = SRPId}} = State,
Connection) ->
Keys = generate_srp_client_keys(Generator, Prime, 0),
PremasterSecret = ssl_handshake:premaster_secret(ServerKey, Keys, SRPId),
calculate_master_secret(PremasterSecret, State#state{srp_keys = Keys}, Connection,
certify, certify).
master_secret(#alert{} = Alert, _) ->
Alert;
master_secret(PremasterSecret, #state{session = Session,
negotiated_version = Version, role = Role,
connection_states = ConnectionStates0} = State) ->
case ssl_handshake:master_secret(tls_record, Version, PremasterSecret,
ConnectionStates0, Role) of
{MasterSecret, ConnectionStates} ->
State#state{
session =
Session#session{master_secret = MasterSecret},
connection_states = ConnectionStates};
#alert{} = Alert ->
Alert
end.
generate_srp_server_keys(_SrpParams, 10) ->
?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER);
generate_srp_server_keys(SrpParams =
#srp_user{generator = Generator, prime = Prime,
verifier = Verifier}, N) ->
case crypto:generate_key(srp, {host, [Verifier, Generator, Prime, '6a']}) of
error ->
generate_srp_server_keys(SrpParams, N+1);
Keys ->
Keys
end.
generate_srp_client_keys(_Generator, _Prime, 10) ->
?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER);
generate_srp_client_keys(Generator, Prime, N) ->
case crypto:generate_key(srp, {user, [Generator, Prime, '6a']}) of
error ->
generate_srp_client_keys(Generator, Prime, N+1);
Keys ->
Keys
end.
handle_srp_identity(Username, {Fun, UserState}) ->
case Fun(srp, Username, UserState) of
{ok, {SRPParams, Salt, DerivedKey}}
when is_atom(SRPParams), is_binary(Salt), is_binary(DerivedKey) ->
{Generator, Prime} = ssl_srp_primes:get_srp_params(SRPParams),
Verifier = crypto:mod_pow(Generator, DerivedKey, Prime),
#srp_user{generator = Generator, prime = Prime,
salt = Salt, verifier = Verifier};
#alert{} = Alert ->
throw(Alert);
_ ->
throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER))
end.
cipher_role(client, Data, Session, #state{connection_states = ConnectionStates0} = State0,
Connection) ->
ConnectionStates = ssl_record:set_server_verify_data(current_both, Data,
ConnectionStates0),
{Record, State} = prepare_connection(State0#state{session = Session,
connection_states = ConnectionStates},
Connection),
Connection:next_event(connection, Record, State);
cipher_role(server, Data, Session, #state{connection_states = ConnectionStates0} = State0,
Connection) ->
ConnectionStates1 = ssl_record:set_client_verify_data(current_read, Data,
ConnectionStates0),
State1 =
finalize_handshake(State0#state{connection_states = ConnectionStates1,
session = Session}, cipher, Connection),
{Record, State} = prepare_connection(State1, Connection),
Connection:next_event(connection, Record, State).
select_curve(#state{client_ecc = {[Curve|_], _}}) ->
{namedCurve, Curve};
select_curve(_) ->
{namedCurve, ?secp256r1}.
is_anonymous(Algo) when Algo == dh_anon;
Algo == ecdh_anon;
Algo == psk;
Algo == dhe_psk;
Algo == rsa_psk;
Algo == srp_anon ->
true;
is_anonymous(_) ->
false.
get_current_prf(CStates, Direction) ->
CS = ssl_record:current_connection_state(CStates, Direction),
CS#connection_state.security_parameters#security_parameters.prf_algorithm.
get_pending_prf(CStates, Direction) ->
CS = ssl_record:pending_connection_state(CStates, Direction),
CS#connection_state.security_parameters#security_parameters.prf_algorithm.
opposite_role(client) ->
server;
opposite_role(server) ->
client.
record_cb(tls_connection) ->
tls_record;
record_cb(dtls_connection) ->
dtls_record.
call(FsmPid, Event) ->
try gen_statem:call(FsmPid, Event)
catch
exit:{noproc, _} ->
{error, closed};
exit:{normal, _} ->
{error, closed};
exit:{{shutdown, _},_} ->
{error, closed}
end.
get_socket_opts(_,_,[], _, Acc) ->
{ok, Acc};
get_socket_opts(Transport, Socket, [mode | Tags], SockOpts, Acc) ->
get_socket_opts(Transport, Socket, Tags, SockOpts,
[{mode, SockOpts#socket_options.mode} | Acc]);
get_socket_opts(Transport, Socket, [packet | Tags], SockOpts, Acc) ->
case SockOpts#socket_options.packet of
{Type, headers} ->
get_socket_opts(Transport, Socket, Tags, SockOpts, [{packet, Type} | Acc]);
Type ->
get_socket_opts(Transport, Socket, Tags, SockOpts, [{packet, Type} | Acc])
end;
get_socket_opts(Transport, Socket, [header | Tags], SockOpts, Acc) ->
get_socket_opts(Transport, Socket, Tags, SockOpts,
[{header, SockOpts#socket_options.header} | Acc]);
get_socket_opts(Transport, Socket, [active | Tags], SockOpts, Acc) ->
get_socket_opts(Transport, Socket, Tags, SockOpts,
[{active, SockOpts#socket_options.active} | Acc]);
get_socket_opts(Transport, Socket, [Tag | Tags], SockOpts, Acc) ->
try ssl_socket:getopts(Transport, Socket, [Tag]) of
{ok, [Opt]} ->
get_socket_opts(Transport, Socket, Tags, SockOpts, [Opt | Acc]);
{error, Error} ->
{error, {options, {socket_options, Tag, Error}}}
catch
%% So that inet behavior does not crash our process
_:Error -> {error, {options, {socket_options, Tag, Error}}}
end;
get_socket_opts(_, _,Opts, _,_) ->
{error, {options, {socket_options, Opts, function_clause}}}.
set_socket_opts(_,_, [], SockOpts, []) ->
{ok, SockOpts};
set_socket_opts(Transport, Socket, [], SockOpts, Other) ->
%% Set non emulated options
try ssl_socket:setopts(Transport, Socket, Other) of
ok ->
{ok, SockOpts};
{error, InetError} ->
{{error, {options, {socket_options, Other, InetError}}}, SockOpts}
catch
_:Error ->
%% So that inet behavior does not crash our process
{{error, {options, {socket_options, Other, Error}}}, SockOpts}
end;
set_socket_opts(Transport,Socket, [{mode, Mode}| Opts], SockOpts, Other)
when Mode == list; Mode == binary ->
set_socket_opts(Transport, Socket, Opts,
SockOpts#socket_options{mode = Mode}, Other);
set_socket_opts(_, _, [{mode, _} = Opt| _], SockOpts, _) ->
{{error, {options, {socket_options, Opt}}}, SockOpts};
set_socket_opts(Transport,Socket, [{packet, Packet}| Opts], SockOpts, Other)
when Packet == raw;
Packet == 0;
Packet == 1;
Packet == 2;
Packet == 4;
Packet == asn1;
Packet == cdr;
Packet == sunrm;
Packet == fcgi;
Packet == tpkt;
Packet == line;
Packet == http;
Packet == httph;
Packet == http_bin;
Packet == httph_bin ->
set_socket_opts(Transport, Socket, Opts,
SockOpts#socket_options{packet = Packet}, Other);
set_socket_opts(_, _, [{packet, _} = Opt| _], SockOpts, _) ->
{{error, {options, {socket_options, Opt}}}, SockOpts};
set_socket_opts(Transport, Socket, [{header, Header}| Opts], SockOpts, Other)
when is_integer(Header) ->
set_socket_opts(Transport, Socket, Opts,
SockOpts#socket_options{header = Header}, Other);
set_socket_opts(_, _, [{header, _} = Opt| _], SockOpts, _) ->
{{error,{options, {socket_options, Opt}}}, SockOpts};
set_socket_opts(Transport, Socket, [{active, Active}| Opts], SockOpts, Other)
when Active == once;
Active == true;
Active == false ->
set_socket_opts(Transport, Socket, Opts,
SockOpts#socket_options{active = Active}, Other);
set_socket_opts(_, _, [{active, _} = Opt| _], SockOpts, _) ->
{{error, {options, {socket_options, Opt}} }, SockOpts};
set_socket_opts(Transport, Socket, [Opt | Opts], SockOpts, Other) ->
set_socket_opts(Transport, Socket, Opts, SockOpts, [Opt | Other]).
start_or_recv_cancel_timer(infinity, _RecvFrom) ->
undefined;
start_or_recv_cancel_timer(Timeout, RecvFrom) ->
erlang:send_after(Timeout, self(), {cancel_start_or_recv, RecvFrom}).
hibernate_after(connection = StateName,
#state{ssl_options=#ssl_options{hibernate_after = HibernateAfter}} = State,
Actions) ->
{next_state, StateName, State, [{timeout, HibernateAfter, hibernate} | Actions]};
hibernate_after(StateName, State, Actions) ->
{next_state, StateName, State, Actions}.
terminate_alert(normal, Version, ConnectionStates) ->
ssl_alert:encode(?ALERT_REC(?WARNING, ?CLOSE_NOTIFY),
Version, ConnectionStates);
terminate_alert({Reason, _}, Version, ConnectionStates) when Reason == close;
Reason == shutdown ->
ssl_alert:encode(?ALERT_REC(?WARNING, ?CLOSE_NOTIFY),
Version, ConnectionStates);
terminate_alert(_, Version, ConnectionStates) ->
{BinAlert, _} = ssl_alert:encode(?ALERT_REC(?FATAL, ?INTERNAL_ERROR),
Version, ConnectionStates),
BinAlert.
handle_trusted_certs_db(#state{ssl_options =
#ssl_options{cacertfile = <<>>, cacerts = []}}) ->
%% No trusted certs specified
ok;
handle_trusted_certs_db(#state{cert_db_ref = Ref,
cert_db = CertDb,
ssl_options = #ssl_options{cacertfile = <<>>}}) when CertDb =/= undefined ->
%% Certs provided as DER directly can not be shared
%% with other connections and it is safe to delete them when the connection ends.
ssl_pkix_db:remove_trusted_certs(Ref, CertDb);
handle_trusted_certs_db(#state{file_ref_db = undefined}) ->
%% Something went wrong early (typically cacertfile does not
%% exist) so there is nothing to handle
ok;
handle_trusted_certs_db(#state{cert_db_ref = Ref,
file_ref_db = RefDb,
ssl_options = #ssl_options{cacertfile = File}}) ->
case ssl_pkix_db:ref_count(Ref, RefDb, -1) of
0 ->
ssl_manager:clean_cert_db(Ref, File);
_ ->
ok
end.
prepare_connection(#state{renegotiation = Renegotiate,
start_or_recv_from = RecvFrom} = State0, Connection)
when Renegotiate =/= {false, first},
RecvFrom =/= undefined ->
State1 = Connection:reinit_handshake_data(State0),
{Record, State} = Connection:next_record(State1),
{Record, ack_connection(State)};
prepare_connection(State0, Connection) ->
State = Connection:reinit_handshake_data(State0),
{no_record, ack_connection(State)}.
ack_connection(#state{renegotiation = {true, Initiater}} = State)
when Initiater == internal;
Initiater == peer ->
State#state{renegotiation = undefined};
ack_connection(#state{renegotiation = {true, From}} = State) ->
gen_statem:reply(From, ok),
State#state{renegotiation = undefined};
ack_connection(#state{renegotiation = {false, first},
start_or_recv_from = StartFrom,
timer = Timer} = State) when StartFrom =/= undefined ->
gen_statem:reply(StartFrom, connected),
cancel_timer(Timer),
State#state{renegotiation = undefined,
start_or_recv_from = undefined, timer = undefined};
ack_connection(State) ->
State.
cancel_timer(undefined) ->
ok;
cancel_timer(Timer) ->
erlang:cancel_timer(Timer),
ok.
register_session(client, Host, Port, #session{is_resumable = new} = Session0) ->
Session = Session0#session{is_resumable = true},
ssl_manager:register_session(Host, Port, Session),
Session;
register_session(server, _, Port, #session{is_resumable = new} = Session0) ->
Session = Session0#session{is_resumable = true},
ssl_manager:register_session(Port, Session),
Session;
register_session(_, _, _, Session) ->
Session. %% Already registered
handle_new_session(NewId, CipherSuite, Compression,
#state{session = Session0,
protocol_cb = Connection} = State0) ->
Session = Session0#session{session_id = NewId,
cipher_suite = CipherSuite,
compression_method = Compression},
{Record, State} = Connection:next_record(State0#state{session = Session}),
Connection:next_event(certify, Record, State).
handle_resumed_session(SessId, #state{connection_states = ConnectionStates0,
negotiated_version = Version,
host = Host, port = Port,
protocol_cb = Connection,
session_cache = Cache,
session_cache_cb = CacheCb} = State0) ->
Session = CacheCb:lookup(Cache, {{Host, Port}, SessId}),
case ssl_handshake:master_secret(tls_record, Version, Session,
ConnectionStates0, client) of
{_, ConnectionStates} ->
{Record, State} =
Connection:next_record(State0#state{
connection_states = ConnectionStates,
session = Session}),
Connection:next_event(abbreviated, Record, State);
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, hello, State0)
end.
make_premaster_secret({MajVer, MinVer}, rsa) ->
Rand = ssl_cipher:random_bytes(?NUM_OF_PREMASTERSECRET_BYTES-2),
<<?BYTE(MajVer), ?BYTE(MinVer), Rand/binary>>;
make_premaster_secret(_, _) ->
undefined.
negotiated_hashsign(undefined, KexAlg, PubKeyInfo, Version) ->
%% Not negotiated choose default
case is_anonymous(KexAlg) of
true ->
{null, anon};
false ->
{PubAlg, _, _} = PubKeyInfo,
ssl_handshake:select_hashsign_algs(undefined, PubAlg, Version)
end;
negotiated_hashsign(HashSign = {_, _}, _, _, _) ->
HashSign.
ssl_options_list(SslOptions) ->
Fileds = record_info(fields, ssl_options),
Values = tl(tuple_to_list(SslOptions)),
ssl_options_list(Fileds, Values, []).
ssl_options_list([],[], Acc) ->
lists:reverse(Acc);
%% Skip internal options, only return user options
ssl_options_list([protocol | Keys], [_ | Values], Acc) ->
ssl_options_list(Keys, Values, Acc);
ssl_options_list([erl_dist | Keys], [_ | Values], Acc) ->
ssl_options_list(Keys, Values, Acc);
ssl_options_list([renegotiate_at | Keys], [_ | Values], Acc) ->
ssl_options_list(Keys, Values, Acc);
ssl_options_list([ciphers = Key | Keys], [Value | Values], Acc) ->
ssl_options_list(Keys, Values,
[{Key, lists:map(
fun(Suite) ->
ssl_cipher:erl_suite_definition(Suite)
end, Value)}
| Acc]);
ssl_options_list([Key | Keys], [Value | Values], Acc) ->
ssl_options_list(Keys, Values, [{Key, Value} | Acc]).
handle_active_option(false, connection = StateName, To, Reply, State) ->
hibernate_after(StateName, State, [{reply, To, Reply}]);
handle_active_option(_, connection = StateName0, To, Reply, #state{protocol_cb = Connection,
user_data_buffer = <<>>} = State0) ->
%% Need data, set active once
{Record, State1} = Connection:next_record_if_active(State0),
%% Note: Renogotiation may cause StateName0 =/= StateName
case Connection:next_event(StateName0, Record, State1) of
{next_state, StateName, State} ->
hibernate_after(StateName, State, [{reply, To, Reply}]);
{next_state, StateName, State, Actions} ->
hibernate_after(StateName, State, [{reply, To, Reply} | Actions]);
{stop, Reason, State} ->
{stop, Reason, State}
end;
handle_active_option(_, StateName, To, Reply, #state{user_data_buffer = <<>>} = State) ->
%% Active once already set
{next_state, StateName, State, [{reply, To, Reply}]};
%% user_data_buffer =/= <<>>
handle_active_option(_, StateName0, To, Reply, #state{protocol_cb = Connection} = State0) ->
case Connection:read_application_data(<<>>, State0) of
{stop, Reason, State} ->
{stop, Reason, State};
{Record, State1} ->
%% Note: Renogotiation may cause StateName0 =/= StateName
case Connection:next_event(StateName0, Record, State1) of
{next_state, StateName, State} ->
hibernate_after(StateName, State, [{reply, To, Reply}]);
{next_state, StateName, State, Actions} ->
hibernate_after(StateName, State, [{reply, To, Reply} | Actions]);
{stop, _, _} = Stop ->
Stop
end
end.
