1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
%% Copyright (c) 2011-2012, Loïc Hoguin <[email protected]>
%%
%% Permission to use, copy, modify, and/or distribute this software for any
%% purpose with or without fee is hereby granted, provided that the above
%% copyright notice and this permission notice appear in all copies.
%%
%% THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
%% WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
%% MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
%% ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
%% WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
%% ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
%% OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
%% @doc SSL transport API.
%%
%% Wrapper around <em>ssl</em> implementing the Ranch transport API.
%%
%% This transport requires the <em>crypto</em>, <em>public_key</em>
%% and <em>ssl</em> applications to be started. If they aren't started,
%% it will try to start them itself before opening a port to listen.
%% Applications aren't stopped when the listening socket is closed, though.
%%
%% @see ssl
-module(ranch_ssl).
-behaviour(ranch_transport).
-export([name/0]).
-export([messages/0]).
-export([listen/1]).
-export([accept/2]).
-export([connect/3]).
-export([recv/3]).
-export([send/2]).
-export([sendfile/2]).
-export([setopts/2]).
-export([controlling_process/2]).
-export([peername/1]).
-export([sockname/1]).
-export([close/1]).
%% @doc Name of this transport, <em>ssl</em>.
name() -> ssl.
%% @doc Atoms used to identify messages in {active, once | true} mode.
messages() -> {ssl, ssl_closed, ssl_error}.
%% @doc Listen for connections on the given port number.
%%
%% Calling this function returns a listening socket that can then
%% The available options are:
%%
%% <dl>
%% <dt>backlog</dt><dd>Maximum length of the pending connections queue.
%% Defaults to 1024.</dd>
%% <dt>cacertfile</dt><dd>Optional. Path to file containing PEM encoded
%% CA certificates (trusted certificates used for verifying a peer
%% certificate).</dd>
%% <dt>certfile</dt><dd>Mandatory. Path to a file containing the user's
%% certificate.</dd>
%% <dt>ciphers</dt><dd>Optional. The cipher suites that should be supported.
%% The function ssl:cipher_suites/0 can be used to find all available
%% ciphers.</dd>
%% <dt>fail_if_no_peer_cert</dt><dd>Optional. Used together with {verify, verify_peer}.
%% If set to true, the server will fail if the client does not have a certificate
%% to send, i.e. sends a empty certificate, if set to false (that is by default)
%% it will only fail if the client sends an invalid certificate (an empty
%% certificate is considered valid).</dd>
%% <dt>ip</dt><dd>Interface to listen on. Listen on all interfaces
%% by default.</dd>
%% <dt>keyfile</dt><dd>Optional. Path to the file containing the user's
%% private PEM encoded key.</dd>
%% <dt>next_protocols_advertised</dt><dd>Optional. Erlang R16B+ required.
%% List of protocols advertised by TLS Next Protocol Negotiation
%% extension.</dd>
%% <dt>nodelay</dt><dd>Optional. Enable TCP_NODELAY. Enabled by default.</dd>
%% <dt>password</dt><dd>Optional. String containing the user's password.
%% All private keyfiles must be password protected currently.</dd>
%% <dt>port</dt><dd>TCP port number to open. Defaults to 0 (see below)</dd>
%% <dt>verify</dt><dd>Optional. If set to verify_peer, performs an x509-path
%% validation and request the client for a certificate.</dd>
%% </dl>
%%
%% You can listen to a random port by setting the port option to 0.
%% It is then possible to retrieve this port number by calling
%% sockname/1 on the listening socket. If you are using Ranch's
%% listener API, then this port number can obtained through
%% ranch:get_port/1 instead.
%%
%% @see ssl:listen/2
-spec listen([{backlog, non_neg_integer()} | {cacerts, [Der::binary()]}
| {cacertfile, string()} | {cert, Der::binary()}
| {certfile, string()} | {ciphers, [ssl:erl_cipher_suite()] | string()}
| {fail_if_no_peer_cert, boolean()}
| {ip, inet:ip_address()} | {key, Der::binary()} | {keyfile, string()}
| {next_protocols_advertised, [binary()]} | {nodelay, boolean()}
| {password, string()} | {port, inet:port_number()}
| {verify, ssl:verify_type()}])
-> {ok, ssl:sslsocket()} | {error, atom()}.
listen(Opts) ->
ranch:require([crypto, public_key, ssl]),
true = lists:keymember(cert, 1, Opts)
orelse lists:keymember(certfile, 1, Opts),
Opts2 = ranch:set_option_default(Opts, backlog, 1024),
%% We set the port to 0 because it is given in the Opts directly.
%% The port in the options takes precedence over the one in the
%% first argument.
ssl:listen(0, ranch:filter_options(Opts2,
[backlog, cacerts, cacertfile, cert, certfile, ciphers,
fail_if_no_peer_cert, ip, key, keyfile, next_protocols_advertised,
nodelay, password, port, raw, verify],
[binary, {active, false}, {packet, raw},
{reuseaddr, true}, {nodelay, true}])).
%% @doc Accept connections with the given listening socket.
%%
%% Note that this function does both the transport accept and
%% the SSL handshake. The returned socket is thus fully connected.
%%
%% @see ssl:transport_accept/2
%% @see ssl:ssl_accept/2
-spec accept(ssl:sslsocket(), timeout())
-> {ok, ssl:sslsocket()} | {error, closed | timeout | atom() | tuple()}.
accept(LSocket, Timeout) ->
case ssl:transport_accept(LSocket, Timeout) of
{ok, CSocket} ->
ssl_accept(CSocket, Timeout);
{error, Reason} ->
{error, Reason}
end.
%% @private Experimental. Open a connection to the given host and port number.
%% @see ssl:connect/3
%% @todo Probably filter Opts?
-spec connect(inet:ip_address() | inet:hostname(),
inet:port_number(), any())
-> {ok, inet:socket()} | {error, atom()}.
connect(Host, Port, Opts) when is_integer(Port) ->
ssl:connect(Host, Port,
Opts ++ [binary, {active, false}, {packet, raw}]).
%% @doc Receive data from a socket in passive mode.
%% @see ssl:recv/3
-spec recv(ssl:sslsocket(), non_neg_integer(), timeout())
-> {ok, any()} | {error, closed | atom()}.
recv(Socket, Length, Timeout) ->
ssl:recv(Socket, Length, Timeout).
%% @doc Send data on a socket.
%% @see ssl:send/2
-spec send(ssl:sslsocket(), iodata()) -> ok | {error, atom()}.
send(Socket, Packet) ->
ssl:send(Socket, Packet).
%% @doc Send a file on a socket.
%%
%% Unlike with TCP, no syscall can be used here, so sending files
%% through SSL will be much slower in comparison.
%%
%% @see file:sendfile/2
-spec sendfile(ssl:sslsocket(), file:name())
-> {ok, non_neg_integer()} | {error, atom()}.
sendfile(Socket, Filepath) ->
{ok, IoDevice} = file:open(Filepath, [read, binary, raw]),
sendfile(Socket, IoDevice, 0).
-spec sendfile(ssl:sslsocket(), file:io_device(), non_neg_integer())
-> {ok, non_neg_integer()} | {error, atom()}.
sendfile(Socket, IoDevice, Sent) ->
case file:read(IoDevice, 16#1FFF) of
eof ->
ok = file:close(IoDevice),
{ok, Sent};
{ok, Bin} ->
case send(Socket, Bin) of
ok ->
sendfile(Socket, IoDevice, Sent + byte_size(Bin));
{error, Reason} ->
{error, Reason}
end
end.
%% @doc Set options on the given socket.
%% @see ssl:setopts/2
%% @todo Probably filter Opts?
-spec setopts(ssl:sslsocket(), list()) -> ok | {error, atom()}.
setopts(Socket, Opts) ->
ssl:setopts(Socket, Opts).
%% @doc Give control of the socket to a new process.
%%
%% Must be called from the process currently controlling the socket,
%% otherwise an {error, not_owner} tuple will be returned.
%%
%% @see ssl:controlling_process/2
-spec controlling_process(ssl:sslsocket(), pid())
-> ok | {error, closed | not_owner | atom()}.
controlling_process(Socket, Pid) ->
ssl:controlling_process(Socket, Pid).
%% @doc Return the remote address and port of the connection.
%% @see ssl:peername/1
-spec peername(ssl:sslsocket())
-> {ok, {inet:ip_address(), inet:port_number()}} | {error, atom()}.
peername(Socket) ->
ssl:peername(Socket).
%% @doc Return the local address and port of the connection.
%% @see ssl:sockname/1
-spec sockname(ssl:sslsocket())
-> {ok, {inet:ip_address(), inet:port_number()}} | {error, atom()}.
sockname(Socket) ->
ssl:sockname(Socket).
%% @doc Close the given socket.
%% @see ssl:close/1
-spec close(ssl:sslsocket()) -> ok.
close(Socket) ->
ssl:close(Socket).
%% Internal.
%% This call always times out, either because a numeric timeout value
%% was given, or because we've decided to use 5000ms instead of infinity.
%% This value should be reasonable enough for the moment.
-spec ssl_accept(ssl:sslsocket(), timeout())
-> {ok, ssl:sslsocket()} | {error, {ssl_accept, atom()}}.
ssl_accept(Socket, infinity) ->
ssl_accept(Socket, 5000);
ssl_accept(Socket, Timeout) ->
case ssl:ssl_accept(Socket, Timeout) of
ok ->
{ok, Socket};
{error, Reason} ->
{error, {ssl_accept, Reason}}
end.
|
