ssl: add option sni_fun

The newly added function sni_fun allows dynamic update of SSL options
like keys and certificates depending on different SNI hostname, rather
than a predefined rules of SSL options.

1 files changed, 33 insertions, 1 deletions

diff --git a/lib/ssl/test/ssl_sni_SUITE.erl b/lib/ssl/test/ssl_sni_SUITE.erl
index 134e508b10..46cd644e4d 100644
--- a/lib/ssl/test/ssl_sni_SUITE.erl
+++ b/lib/ssl/test/ssl_sni_SUITE.erl
@@ -31,7 +31,7 @@
 %%--------------------------------------------------------------------
 suite() -> [{ct_hooks,[ts_install_cth]}].
 
-all() -> [no_sni_header, sni_match, sni_no_match].
+all() -> [no_sni_header, sni_match, sni_no_match] ++ [no_sni_header_fun, sni_match_fun, sni_no_match_fun].
 
 init_per_suite(Config0) ->
     catch crypto:stop(),
@@ -57,12 +57,20 @@ end_per_suite(_) ->
 no_sni_header(Config) ->
     run_handshake(Config, undefined, undefined, "server").
 
+no_sni_header_fun(Config) ->
+    run_sni_fun_handshake(Config, undefined, undefined, "server").
+
 sni_match(Config) ->
     run_handshake(Config, "a.server", "a.server", "a.server").
 
+sni_match_fun(Config) ->
+    run_sni_fun_handshake(Config, "a.server", "a.server", "a.server").
+
 sni_no_match(Config) ->
     run_handshake(Config, "c.server", undefined, "server").
 
+sni_no_match_fun(Config) ->
+    run_sni_fun_handshake(Config, "c.server", undefined, "server").
 
 
 %%--------------------------------------------------------------------
@@ -112,6 +120,30 @@ recv_and_certificate(SSLSocket) ->
     ct:log("Subject of certificate received from server: ~p", [Subject]),
     rdn_to_string(rdnPart(Subject, ?'id-at-commonName')).
 
+run_sni_fun_handshake(Config, SNIHostname, ExpectedSNIHostname, ExpectedCN) ->
+    ct:log("Start running handshake for sni_fun, Config: ~p, SNIHostname: ~p, ExpectedSNIHostname: ~p, ExpectedCN: ~p", [Config, SNIHostname, ExpectedSNIHostname, ExpectedCN]),
+    [{sni_hosts, ServerSNIConf}] = ?config(sni_server_opts, Config),
+    SNIFun = fun(Domain) -> proplists:get_value(Domain, ServerSNIConf, undefined) end,
+    ServerOptions = ?config(server_opts, Config) ++ [{sni_fun, SNIFun}],
+    ClientOptions = 
+    case SNIHostname of
+        undefined ->
+            ?config(client_opts, Config);
+        _ ->
+            [{server_name_indication, SNIHostname}] ++ ?config(client_opts, Config)
+    end,
+    ct:log("Options: ~p", [[ServerOptions, ClientOptions]]),
+    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+    Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
+                                        {from, self()}, {mfa, {?MODULE, send_and_hostname, []}},
+                                        {options, ServerOptions}]),
+    Port = ssl_test_lib:inet_port(Server),
+    Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
+                                        {host, Hostname}, {from, self()},
+                                        {mfa, {?MODULE, recv_and_certificate, []}},
+                                        {options, ClientOptions}]),
+    ssl_test_lib:check_result(Server, ExpectedSNIHostname, Client, ExpectedCN).
+
 
 run_handshake(Config, SNIHostname, ExpectedSNIHostname, ExpectedCN) ->
     ct:log("Start running handshake, Config: ~p, SNIHostname: ~p, ExpectedSNIHostname: ~p, ExpectedCN: ~p", [Config, SNIHostname, ExpectedSNIHostname, ExpectedCN]),