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-rw-r--r--lib/ssl/doc/src/ssl.xml4
-rw-r--r--lib/ssl/src/ssl.erl8
-rw-r--r--lib/ssl/src/ssl_handshake.erl10
-rw-r--r--lib/ssl/src/ssl_internal.hrl5
-rw-r--r--lib/ssl/test/ssl_basic_SUITE.erl50
5 files changed, 71 insertions, 6 deletions
diff --git a/lib/ssl/doc/src/ssl.xml b/lib/ssl/doc/src/ssl.xml
index 80ef419fb7..910dca3889 100644
--- a/lib/ssl/doc/src/ssl.xml
+++ b/lib/ssl/doc/src/ssl.xml
@@ -460,6 +460,10 @@ fun(srp, Username :: string(), UserState :: term()) ->
</item>
<tag>{log_alert, boolean()}</tag>
<item>If false, error reports will not be displayed.</item>
+ <tag>{honor_cipher_order, boolean()}</tag>
+ <item>If true, use the server's preference for cipher selection. If false
+ (the default), use the client's preference.
+ </item>
</taglist>
</section>
diff --git a/lib/ssl/src/ssl.erl b/lib/ssl/src/ssl.erl
index a7fd9f5f81..4646468cb6 100644
--- a/lib/ssl/src/ssl.erl
+++ b/lib/ssl/src/ssl.erl
@@ -640,7 +640,8 @@ handle_options(Opts0, _Role) ->
make_next_protocol_selector(
handle_option(client_preferred_next_protocols, Opts, undefined)),
log_alert = handle_option(log_alert, Opts, true),
- server_name_indication = handle_option(server_name_indication, Opts, undefined)
+ server_name_indication = handle_option(server_name_indication, Opts, undefined),
+ honor_cipher_order = handle_option(honor_cipher_order, Opts, false)
},
CbInfo = proplists:get_value(cb_info, Opts, {gen_tcp, tcp, tcp_closed, tcp_error}),
@@ -652,7 +653,8 @@ handle_options(Opts0, _Role) ->
reuse_session, reuse_sessions, ssl_imp,
cb_info, renegotiate_at, secure_renegotiate, hibernate_after,
erl_dist, next_protocols_advertised,
- client_preferred_next_protocols, log_alert, server_name_indication],
+ client_preferred_next_protocols, log_alert,
+ server_name_indication, honor_cipher_order],
SockOpts = lists:foldl(fun(Key, PropList) ->
proplists:delete(Key, PropList)
@@ -840,6 +842,8 @@ validate_option(server_name_indication, disable) ->
disable;
validate_option(server_name_indication, undefined) ->
undefined;
+validate_option(honor_cipher_order, Value) when is_boolean(Value) ->
+ Value;
validate_option(Opt, Value) ->
throw({error, {options, {Opt, Value}}}).
diff --git a/lib/ssl/src/ssl_handshake.erl b/lib/ssl/src/ssl_handshake.erl
index f5c0034f1b..62de49a349 100644
--- a/lib/ssl/src/ssl_handshake.erl
+++ b/lib/ssl/src/ssl_handshake.erl
@@ -1029,14 +1029,15 @@ cipher_suites(Suites, true) ->
select_session(SuggestedSessionId, CipherSuites, Compressions, Port, #session{ecc = ECCCurve} =
Session, Version,
- #ssl_options{ciphers = UserSuites} = SslOpts, Cache, CacheCb, Cert) ->
+ #ssl_options{ciphers = UserSuites, honor_cipher_order = HCO} = SslOpts,
+ Cache, CacheCb, Cert) ->
{SessionId, Resumed} = ssl_session:server_id(Port, SuggestedSessionId,
SslOpts, Cert,
Cache, CacheCb),
case Resumed of
undefined ->
Suites = available_suites(Cert, UserSuites, Version, ECCCurve),
- CipherSuite = select_cipher_suite(CipherSuites, Suites),
+ CipherSuite = select_cipher_suite(CipherSuites, Suites, HCO),
Compression = select_compression(Compressions),
{new, Session#session{session_id = SessionId,
cipher_suite = CipherSuite,
@@ -1792,6 +1793,11 @@ handle_srp_extension(#srp{username = Username}, Session) ->
%%-------------Misc --------------------------------
+select_cipher_suite(CipherSuites, Suites, false) ->
+ select_cipher_suite(CipherSuites, Suites);
+select_cipher_suite(CipherSuites, Suites, true) ->
+ select_cipher_suite(Suites, CipherSuites).
+
select_cipher_suite([], _) ->
no_suite;
select_cipher_suite([Suite | ClientSuites], SupportedSuites) ->
diff --git a/lib/ssl/src/ssl_internal.hrl b/lib/ssl/src/ssl_internal.hrl
index 0186f9fca2..5a823ec8a4 100644
--- a/lib/ssl/src/ssl_internal.hrl
+++ b/lib/ssl/src/ssl_internal.hrl
@@ -114,7 +114,10 @@
next_protocols_advertised = undefined, %% [binary()],
next_protocol_selector = undefined, %% fun([binary()]) -> binary())
log_alert :: boolean(),
- server_name_indication = undefined
+ server_name_indication = undefined,
+ %% Should the server prefer its own cipher order over the one provided by
+ %% the client?
+ honor_cipher_order = false
}).
-record(config, {ssl, %% SSL parameters
diff --git a/lib/ssl/test/ssl_basic_SUITE.erl b/lib/ssl/test/ssl_basic_SUITE.erl
index bc7e68a86c..430233e7c3 100644
--- a/lib/ssl/test/ssl_basic_SUITE.erl
+++ b/lib/ssl/test/ssl_basic_SUITE.erl
@@ -110,7 +110,10 @@ options_tests() ->
empty_protocol_versions,
ipv6,
reuseaddr,
- tcp_reuseaddr].
+ tcp_reuseaddr,
+ honor_server_cipher_order,
+ honor_client_cipher_order
+].
api_tests() ->
[connection_info,
@@ -2411,6 +2414,51 @@ tcp_reuseaddr(Config) when is_list(Config) ->
%%--------------------------------------------------------------------
+honor_server_cipher_order() ->
+ [{doc,"Test API honor server cipher order."}].
+honor_server_cipher_order(Config) when is_list(Config) ->
+ ClientCiphers = [{rsa, aes_128_cbc, sha}, {rsa, aes_256_cbc, sha}],
+ ServerCiphers = [{rsa, aes_256_cbc, sha}, {rsa, aes_128_cbc, sha}],
+honor_cipher_order(Config, true, ServerCiphers, ClientCiphers, {rsa, aes_256_cbc, sha}).
+
+honor_client_cipher_order() ->
+ [{doc,"Test API honor server cipher order."}].
+honor_client_cipher_order(Config) when is_list(Config) ->
+ ClientCiphers = [{rsa, aes_128_cbc, sha}, {rsa, aes_256_cbc, sha}],
+ ServerCiphers = [{rsa, aes_256_cbc, sha}, {rsa, aes_128_cbc, sha}],
+honor_cipher_order(Config, false, ServerCiphers, ClientCiphers, {rsa, aes_128_cbc, sha}).
+
+honor_cipher_order(Config, Honor, ServerCiphers, ClientCiphers, Expected) ->
+ ClientOpts = ?config(client_opts, Config),
+ ServerOpts = ?config(server_opts, Config),
+
+ {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+
+ Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
+ {from, self()},
+ {mfa, {?MODULE, connection_info_result, []}},
+ {options, [{ciphers, ServerCiphers}, {honor_cipher_order, Honor}
+ | ServerOpts]}]),
+ Port = ssl_test_lib:inet_port(Server),
+ Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
+ {host, Hostname},
+ {from, self()},
+ {mfa, {?MODULE, connection_info_result, []}},
+ {options, [{ciphers, ClientCiphers}, {honor_cipher_order, Honor}
+ | ClientOpts]}]),
+
+ Version =
+ tls_record:protocol_version(tls_record:highest_protocol_version([])),
+
+ ServerMsg = ClientMsg = {ok, {Version, Expected}},
+
+ ssl_test_lib:check_result(Server, ServerMsg, Client, ClientMsg),
+
+ ssl_test_lib:close(Server),
+ ssl_test_lib:close(Client).
+
+%%--------------------------------------------------------------------
+
hibernate() ->
[{doc,"Check that an SSL connection that is started with option "
"{hibernate_after, 1000} indeed hibernates after 1000ms of "
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 14:36:35 +0000