%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2013-2015. 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]).
%% User Events
-export([send/2, recv/3, close/1, 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
]).
-export([handle_session/7]).
%% SSL FSM state functions
-export([hello/3, abbreviated/3, certify/3, cipher/3, connection/3]).
%% SSL all state functions
-export([handle_sync_event/4, handle_info/3, terminate/3, format_status/2]).
%%====================================================================
%% 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 sync_send_all_state_event(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 sync_send_all_state_event(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) ->
sync_send_all_state_event(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) ->
sync_send_all_state_event(Pid, {recv, Length, Timeout}).
%%--------------------------------------------------------------------
-spec connection_information(pid()) -> {ok, list()} | {error, reason()}.
%%
%% Description: Get the SNI hostname
%%--------------------------------------------------------------------
connection_information(Pid) when is_pid(Pid) ->
sync_send_all_state_event(Pid, connection_information).
%%--------------------------------------------------------------------
-spec close(pid()) -> ok | {error, reason()}.
%%
%% Description: Close an ssl connection
%%--------------------------------------------------------------------
close(ConnectionPid) ->
case sync_send_all_state_event(ConnectionPid, close) of
{error, closed} ->
ok;
Other ->
Other
end.
%%--------------------------------------------------------------------
-spec shutdown(pid(), atom()) -> ok | {error, reason()}.
%%
%% Description: Same as gen_tcp:shutdown/2
%%--------------------------------------------------------------------
shutdown(ConnectionPid, How) ->
sync_send_all_state_event(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) ->
sync_send_all_state_event(ConnectionPid, {new_user, User}).
%%--------------------------------------------------------------------
-spec negotiated_protocol(pid()) -> {ok, binary()} | {error, reason()}.
%%
%% Description: Returns the negotiated protocol
%%--------------------------------------------------------------------
negotiated_protocol(ConnectionPid) ->
sync_send_all_state_event(ConnectionPid, negotiated_protocol).
%%--------------------------------------------------------------------
-spec get_opts(pid(), list()) -> {ok, list()} | {error, reason()}.
%%
%% Description: Same as inet:getopts/2
%%--------------------------------------------------------------------
get_opts(ConnectionPid, OptTags) ->
sync_send_all_state_event(ConnectionPid, {get_opts, OptTags}).
%%--------------------------------------------------------------------
-spec set_opts(pid(), list()) -> ok | {error, reason()}.
%%
%% Description: Same as inet:setopts/2
%%--------------------------------------------------------------------
set_opts(ConnectionPid, Options) ->
sync_send_all_state_event(ConnectionPid, {set_opts, Options}).
%%--------------------------------------------------------------------
-spec session_info(pid()) -> {ok, list()} | {error, reason()}.
%%
%% Description: Returns info about the ssl session
%%--------------------------------------------------------------------
session_info(ConnectionPid) ->
sync_send_all_state_event(ConnectionPid, session_info).
%%--------------------------------------------------------------------
-spec peer_certificate(pid()) -> {ok, binary()| undefined} | {error, reason()}.
%%
%% Description: Returns the peer cert
%%--------------------------------------------------------------------
peer_certificate(ConnectionPid) ->
sync_send_all_state_event(ConnectionPid, peer_certificate).
%%--------------------------------------------------------------------
-spec renegotiation(pid()) -> ok | {error, reason()}.
%%
%% Description: Starts a renegotiation of the ssl session.
%%--------------------------------------------------------------------
renegotiation(ConnectionPid) ->
sync_send_all_state_event(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) ->
sync_send_all_state_event(ConnectionPid, {prf, Secret, Label, Seed, WantedLength}).
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 hello(start | #hello_request{} | #server_hello{} | term(),
#state{}, tls_connection | dtls_connection) ->
gen_fsm_state_return().
%%--------------------------------------------------------------------
hello(start, #state{role = server} = State0, Connection) ->
{Record, State} = Connection:next_record(State0),
Connection:next_state(hello, hello, Record, State);
hello(#hello_request{}, #state{role = client} = State0, Connection) ->
{Record, State} = Connection:next_record(State0),
Connection:next_state(hello, hello, Record, State);
hello({common_client_hello, Type, ServerHelloExt, NegotiatedHashSign},
State, Connection) ->
do_server_hello(Type, ServerHelloExt,
%% Note NegotiatedHashSign is only negotiated for real if
%% if TLS version is at least TLS-1.2
State#state{hashsign_algorithm = NegotiatedHashSign}, Connection);
hello(timeout, State, _) ->
{next_state, hello, State, hibernate};
hello(Msg, State, Connection) ->
Connection:handle_unexpected_message(Msg, hello, State).
%%--------------------------------------------------------------------
-spec abbreviated(#hello_request{} | #finished{} | term(),
#state{}, tls_connection | dtls_connection) ->
gen_fsm_state_return().
%%--------------------------------------------------------------------
abbreviated(#hello_request{}, State0, Connection) ->
{Record, State} = Connection:next_record(State0),
Connection:next_state(abbreviated, hello, Record, State);
abbreviated(#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} =
State, 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),
Connection:next_state_connection(abbreviated,
ack_connection(
State#state{connection_states = ConnectionStates,
expecting_finished = false}));
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, abbreviated, State)
end;
abbreviated(#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),
State =
finalize_handshake(State0#state{connection_states = ConnectionStates1},
abbreviated, Connection),
Connection:next_state_connection(abbreviated,
ack_connection(State#state{expecting_finished = false}));
#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(#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_state(abbreviated, abbreviated, Record, State#state{expecting_next_protocol_negotiation = false});
abbreviated(timeout, State, _) ->
{next_state, abbreviated, State, hibernate };
abbreviated(Msg, State, Connection) ->
Connection:handle_unexpected_message(Msg, abbreviated, State).
%%--------------------------------------------------------------------
-spec certify(#hello_request{} | #certificate{} | #server_key_exchange{} |
#certificate_request{} | #server_hello_done{} | #client_key_exchange{} | term(),
#state{}, tls_connection | dtls_connection) ->
gen_fsm_state_return().
%%--------------------------------------------------------------------
certify(#hello_request{}, State0, Connection) ->
{Record, State} = Connection:next_record(State0),
Connection:next_state(certify, hello, Record, State);
certify(#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(#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_state(certify, certify, Record, State);
certify(#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(#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),
HashSign = negotiated_hashsign(Params#server_key_params.hashsign, Alg, 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(#server_key_exchange{} = Msg,
#state{role = client, key_algorithm = rsa} = State, Connection) ->
Connection:handle_unexpected_message(Msg, certify_server_keyexchange, State);
certify(#certificate_request{hashsign_algorithms = HashSigns},
#state{session = #session{own_certificate = Cert},
negotiated_version = Version} = State0, Connection) ->
HashSign = ssl_handshake:select_hashsign(HashSigns, Cert, Version),
{Record, State} = Connection:next_record(State0#state{client_certificate_requested = true}),
Connection:next_state(certify, certify, Record,
State#state{cert_hashsign_algorithm = HashSign});
%% PSK and RSA_PSK might bypass the Server-Key-Exchange
certify(#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(#server_hello_done{},
#state{session = #session{master_secret = undefined},
ssl_options = #ssl_options{user_lookup_fun = PSKLookup},
negotiated_version = {Major, Minor},
psk_identity = PSKIdentity,
premaster_secret = undefined,
role = client,
key_algorithm = Alg} = State0, Connection)
when Alg == rsa_psk ->
Rand = ssl: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 ->
Alert;
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(#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(#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(#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
Connection:handle_unexpected_message(Msg, certify_client_key_exchange, State);
certify(#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(timeout, State, _) ->
{next_state, certify, State, hibernate};
certify(Msg, State, Connection) ->
Connection:handle_unexpected_message(Msg, certify, State).
%%--------------------------------------------------------------------
-spec cipher(#hello_request{} | #certificate_verify{} | #finished{} | term(),
#state{}, tls_connection | dtls_connection) ->
gen_fsm_state_return().
%%--------------------------------------------------------------------
cipher(#hello_request{}, State0, Connection) ->
{Record, State} = Connection:next_record(State0),
Connection:next_state(cipher, hello, Record, State);
cipher(#certificate_verify{signature = Signature, hashsign_algorithm = CertHashSign},
#state{role = server,
public_key_info = {Algo, _, _} =PublicKeyInfo,
negotiated_version = Version,
session = #session{master_secret = MasterSecret},
tls_handshake_history = Handshake
} = State0, Connection) ->
HashSign = ssl_handshake:select_hashsign_algs(CertHashSign, Algo, Version),
case ssl_handshake:certificate_verify(Signature, PublicKeyInfo,
Version, HashSign, MasterSecret, Handshake) of
valid ->
{Record, State} = Connection:next_record(State0),
Connection:next_state(cipher, 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(#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(#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(#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_state(cipher, cipher, Record, State#state{expecting_next_protocol_negotiation = false});
cipher(timeout, State, _) ->
{next_state, cipher, State, hibernate};
cipher(Msg, State, Connection) ->
Connection:handle_unexpected_message(Msg, cipher, State).
%%--------------------------------------------------------------------
-spec connection(term(), #state{}, tls_connection | dtls_connection) ->
gen_fsm_state_return().
%%--------------------------------------------------------------------
connection(timeout, State, _) ->
{next_state, connection, State, hibernate};
connection(Msg, State, Connection) ->
Connection:handle_unexpected_message(Msg, connection, State).
%%--------------------------------------------------------------------
%% Description: Whenever a gen_fsm receives an event sent using
%% gen_fsm:sync_send_all_state_event/2,3, this function is called to handle
%% the event.
%%--------------------------------------------------------------------
handle_sync_event({application_data, Data}, From, connection,
#state{protocol_cb = Connection} = State) ->
%% 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 ->
{reply, Error, connection, State, get_timeout(State)}
end;
handle_sync_event({application_data, Data}, From, StateName,
#state{send_queue = Queue} = State) ->
%% In renegotiation priorities handshake, send data when handshake is finished
{next_state, StateName,
State#state{send_queue = queue:in({From, Data}, Queue)},
get_timeout(State)};
handle_sync_event({start, Timeout}, StartFrom, hello, #state{role = Role,
protocol_cb = Connection,
ssl_options = SSLOpts} = State0) ->
try
State = ssl_config(SSLOpts, Role, State0),
Timer = start_or_recv_cancel_timer(Timeout, StartFrom),
Connection:hello(start, State#state{start_or_recv_from = StartFrom,
timer = Timer})
catch throw:Error ->
{stop, normal, {error, Error}, State0}
end;
handle_sync_event({start, {Opts, EmOpts}, Timeout}, From, StateName, State) ->
try
handle_sync_event({start, Timeout}, From, StateName, State#state{socket_options = EmOpts,
ssl_options = Opts})
catch throw:Error ->
{stop, normal, {error, Error}, State}
end;
%% These two clauses below could happen if a server upgrades a socket in
%% active mode. Note that in this case we are lucky that
%% controlling_process has been evalueated before receiving handshake
%% messages from client. The server should put the socket in passive
%% mode before telling the client that it is willing to upgrade
%% and before calling ssl:ssl_accept/2. These clauses are
%% here to make sure it is the users problem and not owers if
%% they upgrade an active socket.
handle_sync_event({start,_}, _, connection, State) ->
{reply, connected, connection, State, get_timeout(State)};
handle_sync_event({start, Timeout}, StartFrom, StateName, #state{role = Role, ssl_options = SslOpts} = State0) ->
try
State = ssl_config(SslOpts, Role, State0),
Timer = start_or_recv_cancel_timer(Timeout, StartFrom),
{next_state, StateName, State#state{start_or_recv_from = StartFrom,
timer = Timer}, get_timeout(State)}
catch throw:Error ->
{stop, normal, {error, Error}, State0}
end;
handle_sync_event(close, _, StateName, #state{protocol_cb = Connection} = State) ->
%% Run terminate before returning
%% so that the reuseaddr inet-option will work
%% as intended.
(catch Connection:terminate(user_close, StateName, State)),
{stop, normal, ok, State#state{terminated = true}};
handle_sync_event({shutdown, How0}, _, StateName,
#state{transport_cb = Transport,
negotiated_version = Version,
connection_states = ConnectionStates,
socket = Socket} = State) ->
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 ->
{reply, ok, StateName, State, get_timeout(State)};
Error ->
{stop, normal, Error, State}
end;
handle_sync_event({recv, _N, _Timeout}, _RecvFrom, StateName,
#state{socket_options = #socket_options{active = Active}} = State) when Active =/= false ->
{reply, {error, einval}, StateName, State, get_timeout(State)};
handle_sync_event({recv, N, Timeout}, RecvFrom, connection = StateName,
#state{protocol_cb = Connection} = State0) ->
Timer = start_or_recv_cancel_timer(Timeout, RecvFrom),
Connection:passive_receive(State0#state{bytes_to_read = N,
start_or_recv_from = RecvFrom, timer = Timer}, StateName);
%% Doing renegotiate wait with handling request until renegotiate is
%% finished. Will be handled by next_state_is_connection/2.
handle_sync_event({recv, N, Timeout}, RecvFrom, StateName, State) ->
Timer = start_or_recv_cancel_timer(Timeout, RecvFrom),
{next_state, StateName, State#state{bytes_to_read = N, start_or_recv_from = RecvFrom,
timer = Timer},
get_timeout(State)};
handle_sync_event({new_user, User}, _From, StateName,
State =#state{user_application = {OldMon, _}}) ->
NewMon = erlang:monitor(process, User),
erlang:demonitor(OldMon, [flush]),
{reply, ok, StateName, State#state{user_application = {NewMon,User}},
get_timeout(State)};
handle_sync_event({get_opts, OptTags}, _From, StateName,
#state{socket = Socket,
transport_cb = Transport,
socket_options = SockOpts} = State) ->
OptsReply = get_socket_opts(Transport, Socket, OptTags, SockOpts, []),
{reply, OptsReply, StateName, State, get_timeout(State)};
handle_sync_event(negotiated_protocol, _From, StateName, #state{negotiated_protocol = undefined} = State) ->
{reply, {error, protocol_not_negotiated}, StateName, State, get_timeout(State)};
handle_sync_event(negotiated_protocol, _From, StateName, #state{negotiated_protocol = SelectedProtocol} = State) ->
{reply, {ok, SelectedProtocol}, StateName, State, get_timeout(State)};
handle_sync_event({set_opts, Opts0}, _From, StateName0,
#state{socket_options = Opts1,
protocol_cb = Connection,
socket = Socket,
transport_cb = Transport,
user_data_buffer = Buffer} = State0) ->
{Reply, Opts} = set_socket_opts(Transport, Socket, Opts0, Opts1, []),
State1 = State0#state{socket_options = Opts},
if
Opts#socket_options.active =:= false ->
{reply, Reply, StateName0, State1, get_timeout(State1)};
Buffer =:= <<>>, Opts1#socket_options.active =:= false ->
%% Need data, set active once
{Record, State2} = Connection:next_record_if_active(State1),
%% Note: Renogotiation may cause StateName0 =/= StateName
case Connection:next_state(StateName0, StateName0, Record, State2) of
{next_state, StateName, State, Timeout} ->
{reply, Reply, StateName, State, Timeout};
{stop, Reason, State} ->
{stop, Reason, State}
end;
Buffer =:= <<>> ->
%% Active once already set
{reply, Reply, StateName0, State1, get_timeout(State1)};
true ->
case Connection:read_application_data(<<>>, State1) of
Stop = {stop,_,_} ->
Stop;
{Record, State2} ->
%% Note: Renogotiation may cause StateName0 =/= StateName
case Connection:next_state(StateName0, StateName0, Record, State2) of
{next_state, StateName, State, Timeout} ->
{reply, Reply, StateName, State, Timeout};
{stop, Reason, State} ->
{stop, Reason, State}
end
end
end;
handle_sync_event(renegotiate, From, connection, #state{protocol_cb = Connection} = State) ->
Connection:renegotiate(State#state{renegotiation = {true, From}});
handle_sync_event(renegotiate, _, StateName, State) ->
{reply, {error, already_renegotiating}, StateName, State, get_timeout(State)};
handle_sync_event({prf, Secret, Label, Seed, WantedLength}, _, StateName,
#state{connection_states = ConnectionStates,
negotiated_version = Version} = State) ->
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} = 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, SecretToUse, Label, SeedToUse, WantedLength)
catch
exit:_ -> {error, badarg};
error:Reason -> {error, Reason}
end,
{reply, Reply, StateName, State, get_timeout(State)};
handle_sync_event(session_info, _, StateName,
#state{session = #session{session_id = Id,
cipher_suite = Suite}} = State) ->
{reply, [{session_id, Id},
{cipher_suite, ssl:suite_definition(Suite)}],
StateName, State, get_timeout(State)};
handle_sync_event(peer_certificate, _, StateName,
#state{session = #session{peer_certificate = Cert}}
= State) ->
{reply, {ok, Cert}, StateName, State, get_timeout(State)};
handle_sync_event(connection_information, _, StateName, #state{sni_hostname = SNIHostname, session = #session{cipher_suite = CipherSuite}, negotiated_version = Version} = State) ->
{reply, {ok, [{protocol, tls_record:protocol_version(Version)}, {cipher_suite, ssl:suite_definition(CipherSuite)}, {sni_hostname, SNIHostname}]}, StateName, State, get_timeout(State)}.
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}, get_timeout(State)};
handle_info({cancel_start_or_recv, StartFrom}, StateName,
#state{renegotiation = {false, first}} = State) when StateName =/= connection ->
gen_fsm:reply(StartFrom, {error, timeout}),
{stop, {shutdown, user_timeout}, State#state{timer = undefined}};
handle_info({cancel_start_or_recv, RecvFrom}, StateName, #state{start_or_recv_from = RecvFrom} = State) ->
gen_fsm:reply(RecvFrom, {error, timeout}),
{next_state, StateName, State#state{start_or_recv_from = undefined,
bytes_to_read = undefined,
timer = undefined}, get_timeout(State)};
handle_info({cancel_start_or_recv, _RecvFrom}, StateName, State) ->
{next_state, StateName, State#state{timer = undefined}, get_timeout(State)};
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, get_timeout(State)}.
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}, StateName, #state{send_queue = SendQueue,
renegotiation = Renegotiate} = State) ->
handle_unrecv_data(StateName, State),
handle_trusted_certs_db(State),
notify_senders(SendQueue),
notify_renegotiater(Renegotiate);
terminate({shutdown, own_alert}, _StateName, #state{send_queue = SendQueue,
renegotiation = Renegotiate} = State) ->
handle_trusted_certs_db(State),
notify_senders(SendQueue),
notify_renegotiater(Renegotiate);
terminate(Reason, connection, #state{negotiated_version = Version,
protocol_cb = Connection,
connection_states = ConnectionStates,
transport_cb = Transport, socket = Socket,
send_queue = SendQueue, renegotiation = Renegotiate} = State) ->
handle_trusted_certs_db(State),
notify_senders(SendQueue),
notify_renegotiater(Renegotiate),
BinAlert = terminate_alert(Reason, Version, ConnectionStates),
Transport:send(Socket, BinAlert),
case Connection of
tls_connection ->
tls_connection:workaround_transport_delivery_problems(Socket, Transport);
_ ->
ok
end;
terminate(_Reason, _StateName, #state{transport_cb = Transport,
socket = Socket, send_queue = SendQueue,
renegotiation = Renegotiate} = State) ->
handle_trusted_certs_db(State),
notify_senders(SendQueue),
notify_renegotiater(Renegotiate),
Transport:close(Socket).
format_status(normal, [_, State]) ->
[{data, [{"StateData", State}]}];
format_status(terminate, [_, 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, [{"StateData", 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
%%--------------------------------------------------------------------
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 = calendar:datetime_to_gregorian_seconds({date(), 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}.
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_state(hello, 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_state(hello, 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_state(certify, 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_state(certify, 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)).
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)).
request_client_cert(#state{ssl_options = #ssl_options{verify = verify_peer},
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),
Msg = ssl_handshake:certificate_request(CipherSuite, CertDbHandle, CertDbRef, 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_state(Current, 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_state(certify, 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} = State,
Connection) ->
ConnectionStates = ssl_record:set_server_verify_data(current_both, Data, ConnectionStates0),
Connection:next_state_connection(cipher,
ack_connection(
State#state{session = Session,
connection_states = ConnectionStates}));
cipher_role(server, Data, Session, #state{connection_states = ConnectionStates0} = State0,
Connection) ->
ConnectionStates1 = ssl_record:set_client_verify_data(current_read, Data, ConnectionStates0),
State =
finalize_handshake(State0#state{connection_states = ConnectionStates1,
session = Session}, cipher, Connection),
Connection:next_state_connection(cipher, ack_connection(State#state{session = Session})).
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.
sync_send_all_state_event(FsmPid, Event) ->
try gen_fsm:sync_send_all_state_event(FsmPid, Event, infinity)
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}).
get_timeout(#state{ssl_options=#ssl_options{hibernate_after = undefined}}) ->
infinity;
get_timeout(#state{ssl_options=#ssl_options{hibernate_after = HibernateAfter}}) ->
HibernateAfter.
terminate_alert(Reason, Version, ConnectionStates) when Reason == normal;
Reason == user_close ->
{BinAlert, _} = ssl_alert:encode(?ALERT_REC(?WARNING, ?CLOSE_NOTIFY),
Version, ConnectionStates),
BinAlert;
terminate_alert({shutdown, _}, Version, ConnectionStates) ->
{BinAlert, _} = ssl_alert:encode(?ALERT_REC(?WARNING, ?CLOSE_NOTIFY),
Version, ConnectionStates),
BinAlert;
terminate_alert(_, Version, ConnectionStates) ->
{BinAlert, _} = ssl_alert:encode(?ALERT_REC(?FATAL, ?INTERNAL_ERROR),
Version, ConnectionStates),
BinAlert.
handle_unrecv_data(StateName, #state{socket = Socket, transport_cb = Transport,
protocol_cb = Connection} = State) ->
ssl_socket:setopts(Transport, Socket, [{active, false}]),
case Transport:recv(Socket, 0, 0) of
{error, closed} ->
ok;
{ok, Data} ->
Connection:handle_close_alert(Data, StateName, State)
end.
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 = <<>>}}) ->
%% 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.
notify_senders(SendQueue) ->
lists:foreach(fun({From, _}) ->
gen_fsm:reply(From, {error, closed})
end, queue:to_list(SendQueue)).
notify_renegotiater({true, From}) when not is_atom(From) ->
gen_fsm:reply(From, {error, closed});
notify_renegotiater(_) ->
ok.
ack_connection(#state{renegotiation = {true, Initiater}} = State)
when Initiater == internal;
Initiater == peer ->
State#state{renegotiation = undefined};
ack_connection(#state{renegotiation = {true, From}} = State) ->
gen_fsm: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_fsm: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_state(hello, 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_state(hello, abbreviated, Record, State);
#alert{} = Alert ->
Connection:handle_own_alert(Alert, Version, hello, State0)
end.
make_premaster_secret({MajVer, MinVer}, rsa) ->
Rand = ssl:random_bytes(?NUM_OF_PREMASTERSECRET_BYTES-2),
<<?BYTE(MajVer), ?BYTE(MinVer), Rand/binary>>;
make_premaster_secret(_, _) ->
undefined.
negotiated_hashsign(undefined, Alg, Version) ->
%% Not negotiated choose default
case is_anonymous(Alg) of
true ->
{null, anon};
false ->
ssl_handshake:select_hashsign_algs(Alg, Version)
end;
negotiated_hashsign(HashSign = {_, _}, _, _) ->
HashSign.
