%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2008-2015. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
%%
-module(ssh_protocol_SUITE).
-include_lib("common_test/include/ct.hrl").
-include_lib("kernel/include/inet.hrl").
-include_lib("ssh/src/ssh.hrl"). % ?UINT32, ?BYTE, #ssh{} ...
-include_lib("ssh/src/ssh_transport.hrl").
-include_lib("ssh/src/ssh_auth.hrl").
%% Note: This directive should only be used in test suites.
-compile(export_all).
-define(NEWLINE, <<"\r\n">>).
-define(REKEY_DATA_TMO, 65000).
-define(v(Key, Config), proplists:get_value(Key, Config)).
-define(v(Key, Config, Default), proplists:get_value(Key, Config, Default)).
%%--------------------------------------------------------------------
%% Common Test interface functions -----------------------------------
%%--------------------------------------------------------------------
suite() ->
[{ct_hooks,[ts_install_cth]}].
all() ->
[{group,tool_tests},
{group,kex},
{group,service_requests},
{group,packet_size_error},
{group,field_size_error}
].
groups() ->
[{tool_tests, [], [lib_works_as_client,
lib_works_as_server,
lib_match,
lib_no_match
]},
{packet_size_error, [], [packet_length_too_large,
packet_length_too_short]},
{field_size_error, [], [service_name_length_too_large,
service_name_length_too_short]},
{kex, [], [no_common_alg_server_disconnects,
no_common_alg_client_disconnects,
gex_client_init_option_groups,
gex_client_init_option_groups_file
]},
{service_requests, [], [bad_service_name,
bad_long_service_name,
bad_very_long_service_name,
empty_service_name,
bad_service_name_then_correct
]}
].
init_per_suite(Config) ->
start_std_daemon( setup_dirs( start_apps(Config))).
end_per_suite(Config) ->
stop_apps(Config).
init_per_testcase(no_common_alg_server_disconnects, Config) ->
start_std_daemon(Config, [{preferred_algorithms,[{public_key,['ssh-rsa']}]}]);
init_per_testcase(TC, Config) when TC == gex_client_init_option_groups ;
TC == gex_client_init_option_groups_file ->
Opts = case TC of
gex_client_init_option_groups ->
[{dh_gex_groups, [{2345, 3, 41}]}];
gex_client_init_option_groups_file ->
DataDir = ?config(data_dir, Config),
F = filename:join(DataDir, "dh_group_test"),
[{dh_gex_groups, {file,F}}];
_ ->
[]
end,
start_std_daemon(Config,
[{preferred_algorithms, ssh:default_algorithms()}
| Opts]);
init_per_testcase(_TestCase, Config) ->
check_std_daemon_works(Config, ?LINE).
end_per_testcase(no_common_alg_server_disconnects, Config) ->
stop_std_daemon(Config);
end_per_testcase(TC, Config) when TC == gex_client_init_option_groups ;
TC == gex_client_init_option_groups_file ->
stop_std_daemon(Config);
end_per_testcase(_TestCase, Config) ->
check_std_daemon_works(Config, ?LINE).
%%%--------------------------------------------------------------------
%%% Test Cases --------------------------------------------------------
%%%--------------------------------------------------------------------
%%%--------------------------------------------------------------------
%%% Connect to an erlang server and check that the testlib acts as a client.
lib_works_as_client(Config) ->
%% Connect and negotiate keys
{ok,InitialState} = ssh_trpt_test_lib:exec(
[{set_options, [print_ops, print_seqnums, print_messages]}]
),
{ok,AfterKexState} = connect_and_kex(Config, InitialState),
%% Do the authentcation
{User,Pwd} = server_user_password(Config),
{ok,EndState} =
ssh_trpt_test_lib:exec(
[{send, #ssh_msg_service_request{name = "ssh-userauth"}},
{match, #ssh_msg_service_accept{name = "ssh-userauth"}, receive_msg},
{send, #ssh_msg_userauth_request{user = User,
service = "ssh-connection",
method = "password",
data = <<?BOOLEAN(?FALSE),
?STRING(unicode:characters_to_binary(Pwd))>>
}},
{match, #ssh_msg_userauth_success{_='_'}, receive_msg}
], AfterKexState),
%% Disconnect
{ok,_} =
ssh_trpt_test_lib:exec(
[{send, #ssh_msg_disconnect{code = ?SSH_DISCONNECT_BY_APPLICATION,
description = "End of the fun",
language = ""
}},
close_socket
], EndState).
%%--------------------------------------------------------------------
%%% Connect an erlang client and check that the testlib can act as a server.
lib_works_as_server(Config) ->
{User,_Pwd} = server_user_password(Config),
%% Create a listening socket as server socket:
{ok,InitialState} = ssh_trpt_test_lib:exec(listen),
HostPort = ssh_trpt_test_lib:server_host_port(InitialState),
%% Start a process handling one connection on the server side:
spawn_link(
fun() ->
{ok,_} =
ssh_trpt_test_lib:exec(
[{set_options, [print_ops, print_messages]},
{accept, [{system_dir, system_dir(Config)},
{user_dir, user_dir(Config)}]},
receive_hello,
{send, hello},
{send, ssh_msg_kexinit},
{match, #ssh_msg_kexinit{_='_'}, receive_msg},
{match, #ssh_msg_kexdh_init{_='_'}, receive_msg},
{send, ssh_msg_kexdh_reply},
{send, #ssh_msg_newkeys{}},
{match, #ssh_msg_newkeys{_='_'}, receive_msg},
{match, #ssh_msg_service_request{name="ssh-userauth"}, receive_msg},
{send, #ssh_msg_service_accept{name="ssh-userauth"}},
{match, #ssh_msg_userauth_request{service="ssh-connection",
method="none",
user=User,
_='_'}, receive_msg},
{send, #ssh_msg_userauth_failure{authentications = "password",
partial_success = false}},
{match, #ssh_msg_userauth_request{service="ssh-connection",
method="password",
user=User,
_='_'}, receive_msg},
{send, #ssh_msg_userauth_success{}},
close_socket,
print_state
],
InitialState)
end),
%% and finally connect to it with a regular Erlang SSH client:
{ok,_} = std_connect(HostPort, Config,
[{preferred_algorithms,[{kex,['diffie-hellman-group1-sha1']}]}]
).
%%--------------------------------------------------------------------
%%% Matching
lib_match(_Config) ->
{ok,_} =
ssh_trpt_test_lib:exec([{set_options, [print_ops]},
{match, abc, abc},
{match, '$a', {cde,fgh}},
{match, {cde,fgh}, '$a'},
{match, '_', {cde,fgh}},
{match, [a,'$a',b], [a,{cde,fgh},b]},
{match, [a,'$a'|'$b'], [a,{cde,fgh},b,c]},
{match, '$b', [b,c]}
]).
%%--------------------------------------------------------------------
%%% Not matching
lib_no_match(_Config) ->
case ssh_trpt_test_lib:exec([{set_options, [print_ops]},
{match, '$x', b},
{match, a, '$x'}])
of
{ok,_} -> {fail,"Unexpected match"};
{error, {_Op,{expected,a,b},_State}} -> ok
end.
%%--------------------------------------------------------------------
%%% Algo negotiation fail. This should result in a ssh_msg_disconnect
%%% being sent from the server.
no_common_alg_server_disconnects(Config) ->
{ok,_} =
ssh_trpt_test_lib:exec(
[{set_options, [print_ops, {print_messages,detail}]},
{connect,
server_host(Config),server_port(Config),
[{silently_accept_hosts, true},
{user_dir, user_dir(Config)},
{user_interaction, false},
{preferred_algorithms,[{public_key,['ssh-dss']}]}
]},
receive_hello,
{send, hello},
{match, #ssh_msg_kexinit{_='_'}, receive_msg},
{send, ssh_msg_kexinit}, % with server unsupported 'ssh-dss' !
{match,
{'or',[#ssh_msg_disconnect{code = ?SSH_DISCONNECT_KEY_EXCHANGE_FAILED, _='_'},
tcp_closed]},
receive_msg}
]
).
%%--------------------------------------------------------------------
%%% Algo negotiation fail. This should result in a ssh_msg_disconnect
%%% being sent from the client.
no_common_alg_client_disconnects(Config) ->
%% Create a listening socket as server socket:
{ok,InitialState} = ssh_trpt_test_lib:exec(listen),
HostPort = ssh_trpt_test_lib:server_host_port(InitialState),
Parent = self(),
%% Start a process handling one connection on the server side:
Pid =
spawn_link(
fun() ->
Parent !
{result,self(),
ssh_trpt_test_lib:exec(
[{set_options, [print_ops, {print_messages,detail}]},
{accept, [{system_dir, system_dir(Config)},
{user_dir, user_dir(Config)}]},
receive_hello,
{send, hello},
{match, #ssh_msg_kexinit{_='_'}, receive_msg},
{send, #ssh_msg_kexinit{ % with unsupported "SOME-UNSUPPORTED"
cookie = 247381486335508958743193106082599558706,
kex_algorithms = ["diffie-hellman-group1-sha1"],
server_host_key_algorithms = ["SOME-UNSUPPORTED"], % SIC!
encryption_algorithms_client_to_server = ["aes128-ctr"],
encryption_algorithms_server_to_client = ["aes128-ctr"],
mac_algorithms_client_to_server = ["hmac-sha2-256"],
mac_algorithms_server_to_client = ["hmac-sha2-256"],
compression_algorithms_client_to_server = ["none"],
compression_algorithms_server_to_client = ["none"],
languages_client_to_server = [],
languages_server_to_client = [],
first_kex_packet_follows = false,
reserved = 0
}},
{match,
{'or',[#ssh_msg_disconnect{code = ?SSH_DISCONNECT_KEY_EXCHANGE_FAILED, _='_'},
tcp_closed]},
receive_msg}
],
InitialState)
}
end),
%% and finally connect to it with a regular Erlang SSH client
%% which of course does not support SOME-UNSUPPORTED as pub key algo:
Result = std_connect(HostPort, Config, [{preferred_algorithms,[{public_key,['ssh-dss']}]}]),
ct:log("Result of connect is ~p",[Result]),
receive
{result,Pid,{ok,_}} ->
ok;
{result,Pid,{error,{Op,ExecResult,S}}} ->
ct:log("ERROR!~nOp = ~p~nExecResult = ~p~nState =~n~s",
[Op,ExecResult,ssh_trpt_test_lib:format_msg(S)]),
{fail, ExecResult};
X ->
ct:log("¤¤¤¤¤"),
ct:fail(X)
after
30000 -> ct:fail("timeout ~p:~p",[?MODULE,?LINE])
end.
%%%--------------------------------------------------------------------
gex_client_init_option_groups(Config) ->
do_gex_client_init(Config, {2000, 2048, 4000},
{3,41}).
gex_client_init_option_groups_file(Config) ->
do_gex_client_init(Config, {2000, 2048, 4000},
{5,61}).
do_gex_client_init(Config, {Min,N,Max}, {G,P}) ->
{ok,_} =
ssh_trpt_test_lib:exec(
[{set_options, [print_ops, print_seqnums, print_messages]},
{connect,
server_host(Config),server_port(Config),
[{silently_accept_hosts, true},
{user_dir, user_dir(Config)},
{user_interaction, false},
{preferred_algorithms,[{kex,['diffie-hellman-group-exchange-sha1']}]}
]},
receive_hello,
{send, hello},
{send, ssh_msg_kexinit},
{match, #ssh_msg_kexinit{_='_'}, receive_msg},
{send, #ssh_msg_kex_dh_gex_request{min = Min,
n = N,
max = Max}},
{match, #ssh_msg_kex_dh_gex_group{p=P, g=G, _='_'}, receive_msg}
]
).
%%%--------------------------------------------------------------------
bad_service_name(Config) ->
bad_service_name(Config, "kfglkjf").
bad_long_service_name(Config) ->
bad_service_name(Config,
lists:duplicate(?SSH_MAX_PACKET_SIZE div 2, $a)).
bad_very_long_service_name(Config) ->
bad_service_name(Config,
lists:duplicate(4*?SSH_MAX_PACKET_SIZE, $a)).
empty_service_name(Config) ->
bad_service_name(Config, "").
bad_service_name_then_correct(Config) ->
{ok,InitialState} = connect_and_kex(Config),
{ok,_} =
ssh_trpt_test_lib:exec(
[{set_options, [print_ops, print_seqnums, print_messages]},
{send, #ssh_msg_service_request{name = "kdjglkfdjgkldfjglkdfjglkfdjglkj"}},
{send, #ssh_msg_service_request{name = "ssh-connection"}},
{match, {'or',[#ssh_msg_disconnect{_='_'},
tcp_closed
]},
receive_msg}
], InitialState).
bad_service_name(Config, Name) ->
{ok,InitialState} = connect_and_kex(Config),
{ok,_} =
ssh_trpt_test_lib:exec(
[{set_options, [print_ops, print_seqnums, print_messages]},
{send, #ssh_msg_service_request{name = Name}},
{match, {'or',[#ssh_msg_disconnect{_='_'},
tcp_closed
]},
receive_msg}
], InitialState).
%%%--------------------------------------------------------------------
packet_length_too_large(Config) -> bad_packet_length(Config, +4).
packet_length_too_short(Config) -> bad_packet_length(Config, -4).
bad_packet_length(Config, LengthExcess) ->
PacketFun =
fun(Msg, Ssh) ->
BinMsg = ssh_message:encode(Msg),
ssh_transport:pack(BinMsg, Ssh, LengthExcess)
end,
{ok,InitialState} = connect_and_kex(Config),
{ok,_} =
ssh_trpt_test_lib:exec(
[{set_options, [print_ops, print_seqnums, print_messages]},
{send, {special,
#ssh_msg_service_request{name="ssh-userauth"},
PacketFun}},
%% Prohibit remote decoder starvation:
{send, #ssh_msg_service_request{name="ssh-userauth"}},
{match, {'or',[#ssh_msg_disconnect{_='_'},
tcp_closed
]},
receive_msg}
], InitialState).
%%%--------------------------------------------------------------------
service_name_length_too_large(Config) -> bad_service_name_length(Config, +4).
service_name_length_too_short(Config) -> bad_service_name_length(Config, -4).
bad_service_name_length(Config, LengthExcess) ->
PacketFun =
fun(#ssh_msg_service_request{name=Service}, Ssh) ->
BinName = list_to_binary(Service),
BinMsg =
<<?BYTE(?SSH_MSG_SERVICE_REQUEST),
%% A bad string encoding of Service:
?UINT32(size(BinName)+LengthExcess), BinName/binary
>>,
ssh_transport:pack(BinMsg, Ssh)
end,
{ok,InitialState} = connect_and_kex(Config),
{ok,_} =
ssh_trpt_test_lib:exec(
[{set_options, [print_ops, print_seqnums, print_messages]},
{send, {special,
#ssh_msg_service_request{name="ssh-userauth"},
PacketFun} },
%% Prohibit remote decoder starvation:
{send, #ssh_msg_service_request{name="ssh-userauth"}},
{match, {'or',[#ssh_msg_disconnect{_='_'},
tcp_closed
]},
receive_msg}
], InitialState).
%%%================================================================
%%%==== Internal functions ========================================
%%%================================================================
%%%---- init_suite and end_suite ---------------------------------------
start_apps(Config) ->
catch crypto:stop(),
case catch crypto:start() of
ok ->
catch ssh:stop(),
ok = ssh:start(),
[{stop_apps,
fun() ->
ssh:stop(),
crypto:stop()
end} | Config];
_Else ->
{skip, "Crypto could not be started!"}
end.
stop_apps(Config) ->
(?v(stop_apps, Config, fun()-> ok end))(),
ssh:stop().
setup_dirs(Config) ->
DataDir = ?config(data_dir, Config),
PrivDir = ?config(priv_dir, Config),
ssh_test_lib:setup_rsa(DataDir, PrivDir),
Config.
system_dir(Config) -> filename:join(?config(priv_dir, Config), system).
user_dir(Config) -> ?config(priv_dir, Config).
%%%----------------------------------------------------------------
start_std_daemon(Config) ->
start_std_daemon(Config, []).
start_std_daemon(Config, ExtraOpts) ->
PrivDir = ?config(priv_dir, Config),
UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
file:make_dir(UserDir),
UserPasswords = [{"user1","pwd1"}],
Options = [%%{preferred_algorithms,[{public_key,['ssh-rsa']}]}, %% For some test cases
{system_dir, system_dir(Config)},
{user_dir, UserDir},
{user_passwords, UserPasswords},
{failfun, fun ssh_test_lib:failfun/2}
| ExtraOpts],
Ref = {Server, Host, Port} = ssh_test_lib:daemon(Options),
ct:log("Std server ~p started at ~p:~p~nOptions=~p",[Server, Host, Port, Options]),
[{server,Ref}, {user_passwords, UserPasswords} | Config].
stop_std_daemon(Config) ->
ssh:stop_daemon(server_pid(Config)),
ct:log("Std server ~p at ~p:~p stopped", [server_pid(Config), server_host(Config), server_port(Config)]),
lists:keydelete(server, 1, Config).
check_std_daemon_works(Config, Line) ->
case std_connect(Config) of
{ok,C} ->
ct:log("Server ~p:~p ~p is ok at line ~p",
[server_host(Config), server_port(Config),
server_pid(Config), Line]),
ok = ssh:close(C),
Config;
Error = {error,_} ->
ct:fail("Standard server ~p:~p ~p is ill at line ~p: ~p",
[server_host(Config), server_port(Config),
server_pid(Config), Line, Error])
end.
server_pid(Config) -> element(1,?v(server,Config)).
server_host(Config) -> element(2,?v(server,Config)).
server_port(Config) -> element(3,?v(server,Config)).
server_user_password(Config) -> server_user_password(1, Config).
server_user_password(N, Config) -> lists:nth(N, ?v(user_passwords,Config)).
std_connect(Config) ->
std_connect({server_host(Config), server_port(Config)}, Config).
std_connect({Host,Port}, Config) ->
std_connect({Host,Port}, Config, []).
std_connect({Host,Port}, Config, Opts) ->
std_connect(Host, Port, Config, Opts).
std_connect(Host, Port, Config, Opts) ->
{User,Pwd} = server_user_password(Config),
ssh:connect(Host, Port,
%% Prefere User's Opts to the default opts
[O || O = {Tag,_} <- [{user,User},{password,Pwd},
{silently_accept_hosts, true},
{user_dir, user_dir(Config)},
{user_interaction, false}],
not lists:keymember(Tag, 1, Opts)
] ++ Opts,
30000).
%%%----------------------------------------------------------------
connect_and_kex(Config) ->
connect_and_kex(Config, ssh_trpt_test_lib:exec([]) ).
connect_and_kex(Config, InitialState) ->
ssh_trpt_test_lib:exec(
[{connect,
server_host(Config),server_port(Config),
[{preferred_algorithms,[{kex,['diffie-hellman-group1-sha1']}]},
{silently_accept_hosts, true},
{user_dir, user_dir(Config)},
{user_interaction, false}]},
receive_hello,
{send, hello},
{send, ssh_msg_kexinit},
{match, #ssh_msg_kexinit{_='_'}, receive_msg},
{send, ssh_msg_kexdh_init},
{match,# ssh_msg_kexdh_reply{_='_'}, receive_msg},
{send, #ssh_msg_newkeys{}},
{match, #ssh_msg_newkeys{_='_'}, receive_msg}
],
InitialState).
