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%%% Purpose: Example of SSL client and server using example certificates.
-module(client_server).
-export([start/0, start/1, init_connect/1]).
start() ->
start([ssl, subject]).
start(CertOpts) ->
%% Start ssl application
application:start(ssl),
%% Always seed
ssl:seed("ellynatefttidppohjeh"),
%% Let the current process be the server that listens and accepts
%% Listen
{ok, LSock} = ssl:listen(0, mk_opts(listen)),
{ok, LPort} = ssl:port(LSock),
io:fwrite("Listen: port = ~w.~n", [LPort]),
%% Spawn the client process that connects to the server
spawn(?MODULE, init_connect, [{LPort, CertOpts}]),
%% Accept
{ok, ASock} = ssl:accept(LSock),
io:fwrite("Accept: accepted.~n"),
{ok, Cert} = ssl:peercert(ASock, CertOpts),
io:fwrite("Accept: peer cert:~n~p~n", [Cert]),
io:fwrite("Accept: sending \"hello\".~n"),
ssl:send(ASock, "hello"),
{error, closed} = ssl:recv(ASock, 0),
io:fwrite("Accept: detected closed.~n"),
ssl:close(ASock),
io:fwrite("Listen: closing and terminating.~n"),
ssl:close(LSock),
application:stop(ssl).
%% Client connect
init_connect({LPort, CertOpts}) ->
{ok, Host} = inet:gethostname(),
{ok, CSock} = ssl:connect(Host, LPort, mk_opts(connect)),
io:fwrite("Connect: connected.~n"),
{ok, Cert} = ssl:peercert(CSock, CertOpts),
io:fwrite("Connect: peer cert:~n~p~n", [Cert]),
{ok, Data} = ssl:recv(CSock, 0),
io:fwrite("Connect: got data: ~p~n", [Data]),
io:fwrite("Connect: closing and terminating.~n"),
ssl:close(CSock).
mk_opts(listen) ->
mk_opts("server");
mk_opts(connect) ->
mk_opts("client");
mk_opts(Role) ->
Dir = filename:join([code:lib_dir(ssl), "examples", "certs", "etc"]),
[{active, false},
{verify, 2},
{depth, 2},
{cacertfile, filename:join([Dir, Role, "cacerts.pem"])},
{certfile, filename:join([Dir, Role, "cert.pem"])},
{keyfile, filename:join([Dir, Role, "key.pem"])}].
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