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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2008-2015. 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%
+%%
+
+-module(ssh_renegotiate_SUITE).
+
+-include_lib("common_test/include/ct.hrl").
+
+%% Note: This directive should only be used in test suites.
+-compile(export_all).
+
+-define(REKEY_DATA_TMO, 65000).
+%%--------------------------------------------------------------------
+%% Common Test interface functions -----------------------------------
+%%--------------------------------------------------------------------
+
+suite() -> [{ct_hooks,[ts_install_cth]},
+ {timetrap,{minutes,12}}].
+
+
+all() -> [{group,default_algs},
+ {group,aes_gcm}
+ ].
+
+groups() -> [{default_algs, [], tests()},
+ {aes_gcm, [], tests()}
+ ].
+
+tests() -> [rekey, rekey_limit, renegotiate1, renegotiate2].
+
+%%--------------------------------------------------------------------
+init_per_suite(Config) ->
+ Config.
+
+end_per_suite(_Config) ->
+ ssh:stop().
+
+%%--------------------------------------------------------------------
+init_per_group(aes_gcm, Config) ->
+ case lists:member({client2server,['[email protected]']},
+ ssh_transport:supported_algorithms(cipher)) of
+ true ->
+ [{preferred_algorithms, [{cipher,[{client2server,['[email protected]']},
+ {server2client,['[email protected]']}]}]}
+ | Config];
+ false ->
+ {skip, "aes_gcm not supported"}
+ end;
+init_per_group(_, Config) ->
+ [{preferred_algorithms, ssh:default_algorithms()} | Config].
+
+
+end_per_group(_, Config) ->
+ Config.
+
+%%--------------------------------------------------------------------
+init_per_testcase(_TestCase, Config) ->
+ ssh:start(),
+ Config.
+
+end_per_testcase(_TestCase, _Config) ->
+ ssh:stop(),
+ ok.
+
+%%--------------------------------------------------------------------
+%% Test Cases --------------------------------------------------------
+%%--------------------------------------------------------------------
+
+%%% Idle timeout test
+
+rekey(Config) ->
+ {Pid, Host, Port} =
+ ssh_test_lib:std_daemon(Config,
+ [{rekey_limit, 0}]),
+ ConnectionRef =
+ ssh_test_lib:std_connect(Config, Host, Port,
+ [{rekey_limit, 0}]),
+ Kex1 = get_kex_init(ConnectionRef),
+ receive
+ after ?REKEY_DATA_TMO ->
+ %%By this time rekeying would have been done
+ Kex2 = get_kex_init(ConnectionRef),
+ false = (Kex2 == Kex1),
+ ssh:close(ConnectionRef),
+ ssh:stop_daemon(Pid)
+ end.
+
+%%--------------------------------------------------------------------
+
+%%% Test rekeying by data volume
+
+rekey_limit(Config) ->
+ UserDir = ?config(priv_dir, Config),
+ DataFile = filename:join(UserDir, "rekey.data"),
+
+ Algs = ?config(preferred_algorithms, Config),
+ {Pid, Host, Port} = ssh_test_lib:std_daemon(Config,[{max_random_length_padding,0},
+ {preferred_algorithms,Algs}]),
+
+ ConnectionRef = ssh_test_lib:std_connect(Config, Host, Port, [{rekey_limit, 6000},
+ {max_random_length_padding,0}]),
+ {ok, SftpPid} = ssh_sftp:start_channel(ConnectionRef),
+
+ Kex1 = get_kex_init(ConnectionRef),
+
+ timer:sleep(?REKEY_DATA_TMO),
+ Kex1 = get_kex_init(ConnectionRef),
+
+ Data = lists:duplicate(159000,1),
+ ok = ssh_sftp:write_file(SftpPid, DataFile, Data),
+
+ timer:sleep(?REKEY_DATA_TMO),
+ Kex2 = get_kex_init(ConnectionRef),
+
+ false = (Kex2 == Kex1),
+
+ timer:sleep(?REKEY_DATA_TMO),
+ Kex2 = get_kex_init(ConnectionRef),
+
+ ok = ssh_sftp:write_file(SftpPid, DataFile, "hi\n"),
+
+ timer:sleep(?REKEY_DATA_TMO),
+ Kex2 = get_kex_init(ConnectionRef),
+
+ false = (Kex2 == Kex1),
+
+ timer:sleep(?REKEY_DATA_TMO),
+ Kex2 = get_kex_init(ConnectionRef),
+
+ ssh_sftp:stop_channel(SftpPid),
+ ssh:close(ConnectionRef),
+ ssh:stop_daemon(Pid).
+
+%%--------------------------------------------------------------------
+
+%%% Test rekeying with simulataneous send request
+
+renegotiate1(Config) ->
+ UserDir = ?config(priv_dir, Config),
+ DataFile = filename:join(UserDir, "renegotiate1.data"),
+
+ Algs = ?config(preferred_algorithms, Config),
+ {Pid, Host, DPort} = ssh_test_lib:std_daemon(Config,[{max_random_length_padding,0},
+ {preferred_algorithms,Algs}]),
+
+ RPort = ssh_test_lib:inet_port(),
+ {ok,RelayPid} = ssh_relay:start_link({0,0,0,0}, RPort, Host, DPort),
+
+
+ ConnectionRef = ssh_test_lib:std_connect(Config, Host, RPort, [{max_random_length_padding,0}]),
+ {ok, SftpPid} = ssh_sftp:start_channel(ConnectionRef),
+
+ Kex1 = get_kex_init(ConnectionRef),
+
+ {ok, Handle} = ssh_sftp:open(SftpPid, DataFile, [write]),
+
+ ok = ssh_sftp:write(SftpPid, Handle, "hi\n"),
+
+ ssh_relay:hold(RelayPid, rx, 20, 1000),
+ ssh_connection_handler:renegotiate(ConnectionRef),
+ spawn(fun() -> ok=ssh_sftp:write(SftpPid, Handle, "another hi\n") end),
+
+ timer:sleep(2000),
+
+ Kex2 = get_kex_init(ConnectionRef),
+
+ false = (Kex2 == Kex1),
+
+ ssh_relay:stop(RelayPid),
+ ssh_sftp:stop_channel(SftpPid),
+ ssh:close(ConnectionRef),
+ ssh:stop_daemon(Pid).
+
+%%--------------------------------------------------------------------
+
+%%% Test rekeying with inflight messages from peer
+
+renegotiate2(Config) ->
+ UserDir = ?config(priv_dir, Config),
+ DataFile = filename:join(UserDir, "renegotiate2.data"),
+
+ Algs = ?config(preferred_algorithms, Config),
+ {Pid, Host, DPort} = ssh_test_lib:std_daemon(Config,[{max_random_length_padding,0},
+ {preferred_algorithms,Algs}]),
+
+ RPort = ssh_test_lib:inet_port(),
+ {ok,RelayPid} = ssh_relay:start_link({0,0,0,0}, RPort, Host, DPort),
+
+ ConnectionRef = ssh_test_lib:std_connect(Config, Host, RPort, [{max_random_length_padding,0}]),
+ {ok, SftpPid} = ssh_sftp:start_channel(ConnectionRef),
+
+ Kex1 = get_kex_init(ConnectionRef),
+
+ {ok, Handle} = ssh_sftp:open(SftpPid, DataFile, [write]),
+
+ ok = ssh_sftp:write(SftpPid, Handle, "hi\n"),
+
+ ssh_relay:hold(RelayPid, rx, 20, infinity),
+ spawn(fun() -> ok=ssh_sftp:write(SftpPid, Handle, "another hi\n") end),
+ %% need a small pause here to ensure ssh_sftp:write is executed
+ ct:sleep(10),
+ ssh_connection_handler:renegotiate(ConnectionRef),
+ ssh_relay:release(RelayPid, rx),
+
+ timer:sleep(2000),
+
+ Kex2 = get_kex_init(ConnectionRef),
+
+ false = (Kex2 == Kex1),
+
+ ssh_relay:stop(RelayPid),
+ ssh_sftp:stop_channel(SftpPid),
+ ssh:close(ConnectionRef),
+ ssh:stop_daemon(Pid).
+
+%%--------------------------------------------------------------------
+%% Internal functions ------------------------------------------------
+%%--------------------------------------------------------------------
+%% get_kex_init - helper function to get key_exchange_init_msg
+get_kex_init(Conn) ->
+ %% First, validate the key exchange is complete (StateName == connected)
+ {connected,S} = sys:get_state(Conn),
+ %% Next, walk through the elements of the #state record looking
+ %% for the #ssh_msg_kexinit record. This method is robust against
+ %% changes to either record. The KEXINIT message contains a cookie
+ %% unique to each invocation of the key exchange procedure (RFC4253)
+ SL = tuple_to_list(S),
+ case lists:keyfind(ssh_msg_kexinit, 1, SL) of
+ false ->
+ throw(not_found);
+ KexInit ->
+ KexInit
+ end.
+
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