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-rw-r--r--lib/ssh/src/ssh.hrl2
-rw-r--r--lib/ssh/src/ssh_auth.erl21
-rw-r--r--lib/ssh/src/ssh_connection_handler.erl92
-rw-r--r--lib/ssh/test/ssh_algorithms_SUITE.erl18
4 files changed, 83 insertions, 50 deletions
diff --git a/lib/ssh/src/ssh.hrl b/lib/ssh/src/ssh.hrl
index 868f3a9181..4cd91177f6 100644
--- a/lib/ssh/src/ssh.hrl
+++ b/lib/ssh/src/ssh.hrl
@@ -127,7 +127,7 @@
recv_sequence = 0,
keyex_key,
keyex_info,
- random_length_padding = 255, % From RFC 4253 section 6.
+ random_length_padding = 15, % From RFC 4253 section 6.
%% User auth
user,
diff --git a/lib/ssh/src/ssh_auth.erl b/lib/ssh/src/ssh_auth.erl
index fb5e086656..1dcf5d0708 100644
--- a/lib/ssh/src/ssh_auth.erl
+++ b/lib/ssh/src/ssh_auth.erl
@@ -264,12 +264,23 @@ handle_userauth_request(#ssh_msg_userauth_request{user = User,
SessionId,
#ssh{opts = Opts,
userauth_supported_methods = Methods} = Ssh) ->
- <<?BYTE(HaveSig), ?UINT32(ALen), BAlg:ALen/binary,
- ?UINT32(KLen), KeyBlob:KLen/binary, SigWLen/binary>> = Data,
- Alg = binary_to_list(BAlg),
+
+ <<?BYTE(HaveSig),
+ ?UINT32(ALen), BAlg:ALen/binary,
+ Rest/binary>> = Data,
+
+ {KeyBlob, SigWLen} =
+ case Rest of
+ <<?UINT32(KLen0), KeyBlob0:KLen0/binary, SigWLen0/binary>> ->
+ {KeyBlob0, SigWLen0};
+ <<>> ->
+ {<<>>, <<>>}
+ end,
+
case HaveSig of
?TRUE ->
- case verify_sig(SessionId, User, "ssh-connection", Alg,
+ case verify_sig(SessionId, User, "ssh-connection",
+ binary_to_list(BAlg),
KeyBlob, SigWLen, Opts) of
true ->
{authorized, User,
@@ -284,7 +295,7 @@ handle_userauth_request(#ssh_msg_userauth_request{user = User,
?FALSE ->
{not_authorized, {User, undefined},
ssh_transport:ssh_packet(
- #ssh_msg_userauth_pk_ok{algorithm_name = Alg,
+ #ssh_msg_userauth_pk_ok{algorithm_name = binary_to_list(BAlg),
key_blob = KeyBlob}, Ssh)}
end;
diff --git a/lib/ssh/src/ssh_connection_handler.erl b/lib/ssh/src/ssh_connection_handler.erl
index dcb6ff9343..2eb29c9b32 100644
--- a/lib/ssh/src/ssh_connection_handler.erl
+++ b/lib/ssh/src/ssh_connection_handler.erl
@@ -339,6 +339,7 @@ renegotiate_data(ConnectionHandler) ->
ssh_params :: #ssh{}
| undefined,
socket :: inet:socket(),
+ sender :: pid() | undefined,
decrypted_data_buffer = <<>> :: binary(),
encrypted_data_buffer = <<>> :: binary(),
undecrypted_packet_length :: undefined | non_neg_integer(),
@@ -367,9 +368,10 @@ init_connection_handler(Role, Socket, Opts) ->
{Protocol, Callback, CloseTag} =
proplists:get_value(transport, Opts, ?DefaultTransport),
S0#data{ssh_params = init_ssh_record(Role, Socket, Opts),
- transport_protocol = Protocol,
- transport_cb = Callback,
- transport_close_tag = CloseTag
+ sender = spawn_link(fun() -> nonblocking_sender(Socket, Callback) end),
+ transport_protocol = Protocol,
+ transport_cb = Callback,
+ transport_close_tag = CloseTag
}
of
S ->
@@ -525,7 +527,7 @@ handle_event(_, _Event, {init_error,Error}, _) ->
%% The very first event that is sent when the we are set as controlling process of Socket
handle_event(_, socket_control, {hello,_}, D) ->
VsnMsg = ssh_transport:hello_version_msg(string_version(D#data.ssh_params)),
- ok = send_bytes(VsnMsg, D),
+ send_bytes(VsnMsg, D),
case inet:getopts(Socket=D#data.socket, [recbuf]) of
{ok, [{recbuf,Size}]} ->
%% Set the socket to the hello text line handling mode:
@@ -550,7 +552,7 @@ handle_event(_, {info_line,_Line}, {hello,Role}, D) ->
server ->
%% But the client may NOT send them to the server. Openssh answers with cleartext,
%% and so do we
- ok = send_bytes("Protocol mismatch.", D),
+ send_bytes("Protocol mismatch.", D),
{stop, {shutdown,"Protocol mismatch in version exchange. Client sent info lines."}}
end;
@@ -565,7 +567,7 @@ handle_event(_, {version_exchange,Version}, {hello,Role}, D) ->
{active, once},
{recbuf, D#data.inet_initial_recbuf_size}]),
{KeyInitMsg, SshPacket, Ssh} = ssh_transport:key_exchange_init_msg(Ssh1),
- ok = send_bytes(SshPacket, D),
+ send_bytes(SshPacket, D),
{next_state, {kexinit,Role,init}, D#data{ssh_params = Ssh,
key_exchange_init_msg = KeyInitMsg}};
not_supported ->
@@ -583,7 +585,7 @@ handle_event(_, {#ssh_msg_kexinit{}=Kex, Payload}, {kexinit,Role,ReNeg},
Ssh1 = ssh_transport:key_init(peer_role(Role), D#data.ssh_params, Payload),
Ssh = case ssh_transport:handle_kexinit_msg(Kex, OwnKex, Ssh1) of
{ok, NextKexMsg, Ssh2} when Role==client ->
- ok = send_bytes(NextKexMsg, D),
+ send_bytes(NextKexMsg, D),
Ssh2;
{ok, Ssh2} when Role==server ->
Ssh2
@@ -596,43 +598,43 @@ handle_event(_, {#ssh_msg_kexinit{}=Kex, Payload}, {kexinit,Role,ReNeg},
%%%---- diffie-hellman
handle_event(_, #ssh_msg_kexdh_init{} = Msg, {key_exchange,server,ReNeg}, D) ->
{ok, KexdhReply, Ssh1} = ssh_transport:handle_kexdh_init(Msg, D#data.ssh_params),
- ok = send_bytes(KexdhReply, D),
+ send_bytes(KexdhReply, D),
{ok, NewKeys, Ssh} = ssh_transport:new_keys_message(Ssh1),
- ok = send_bytes(NewKeys, D),
+ send_bytes(NewKeys, D),
{next_state, {new_keys,server,ReNeg}, D#data{ssh_params=Ssh}};
handle_event(_, #ssh_msg_kexdh_reply{} = Msg, {key_exchange,client,ReNeg}, D) ->
{ok, NewKeys, Ssh} = ssh_transport:handle_kexdh_reply(Msg, D#data.ssh_params),
- ok = send_bytes(NewKeys, D),
+ send_bytes(NewKeys, D),
{next_state, {new_keys,client,ReNeg}, D#data{ssh_params=Ssh}};
%%%---- diffie-hellman group exchange
handle_event(_, #ssh_msg_kex_dh_gex_request{} = Msg, {key_exchange,server,ReNeg}, D) ->
{ok, GexGroup, Ssh} = ssh_transport:handle_kex_dh_gex_request(Msg, D#data.ssh_params),
- ok = send_bytes(GexGroup, D),
+ send_bytes(GexGroup, D),
{next_state, {key_exchange_dh_gex_init,server,ReNeg}, D#data{ssh_params=Ssh}};
handle_event(_, #ssh_msg_kex_dh_gex_request_old{} = Msg, {key_exchange,server,ReNeg}, D) ->
{ok, GexGroup, Ssh} = ssh_transport:handle_kex_dh_gex_request(Msg, D#data.ssh_params),
- ok = send_bytes(GexGroup, D),
+ send_bytes(GexGroup, D),
{next_state, {key_exchange_dh_gex_init,server,ReNeg}, D#data{ssh_params=Ssh}};
handle_event(_, #ssh_msg_kex_dh_gex_group{} = Msg, {key_exchange,client,ReNeg}, D) ->
{ok, KexGexInit, Ssh} = ssh_transport:handle_kex_dh_gex_group(Msg, D#data.ssh_params),
- ok = send_bytes(KexGexInit, D),
+ send_bytes(KexGexInit, D),
{next_state, {key_exchange_dh_gex_reply,client,ReNeg}, D#data{ssh_params=Ssh}};
%%%---- elliptic curve diffie-hellman
handle_event(_, #ssh_msg_kex_ecdh_init{} = Msg, {key_exchange,server,ReNeg}, D) ->
{ok, KexEcdhReply, Ssh1} = ssh_transport:handle_kex_ecdh_init(Msg, D#data.ssh_params),
- ok = send_bytes(KexEcdhReply, D),
+ send_bytes(KexEcdhReply, D),
{ok, NewKeys, Ssh} = ssh_transport:new_keys_message(Ssh1),
- ok = send_bytes(NewKeys, D),
+ send_bytes(NewKeys, D),
{next_state, {new_keys,server,ReNeg}, D#data{ssh_params=Ssh}};
handle_event(_, #ssh_msg_kex_ecdh_reply{} = Msg, {key_exchange,client,ReNeg}, D) ->
{ok, NewKeys, Ssh} = ssh_transport:handle_kex_ecdh_reply(Msg, D#data.ssh_params),
- ok = send_bytes(NewKeys, D),
+ send_bytes(NewKeys, D),
{next_state, {new_keys,client,ReNeg}, D#data{ssh_params=Ssh}};
@@ -640,9 +642,9 @@ handle_event(_, #ssh_msg_kex_ecdh_reply{} = Msg, {key_exchange,client,ReNeg}, D)
handle_event(_, #ssh_msg_kex_dh_gex_init{} = Msg, {key_exchange_dh_gex_init,server,ReNeg}, D) ->
{ok, KexGexReply, Ssh1} = ssh_transport:handle_kex_dh_gex_init(Msg, D#data.ssh_params),
- ok = send_bytes(KexGexReply, D),
+ send_bytes(KexGexReply, D),
{ok, NewKeys, Ssh} = ssh_transport:new_keys_message(Ssh1),
- ok = send_bytes(NewKeys, D),
+ send_bytes(NewKeys, D),
{next_state, {new_keys,server,ReNeg}, D#data{ssh_params=Ssh}};
@@ -650,7 +652,7 @@ handle_event(_, #ssh_msg_kex_dh_gex_init{} = Msg, {key_exchange_dh_gex_init,serv
handle_event(_, #ssh_msg_kex_dh_gex_reply{} = Msg, {key_exchange_dh_gex_reply,client,ReNeg}, D) ->
{ok, NewKeys, Ssh1} = ssh_transport:handle_kex_dh_gex_reply(Msg, D#data.ssh_params),
- ok = send_bytes(NewKeys, D),
+ send_bytes(NewKeys, D),
{next_state, {new_keys,client,ReNeg}, D#data{ssh_params=Ssh1}};
@@ -662,7 +664,7 @@ handle_event(_, #ssh_msg_newkeys{} = Msg, {new_keys,Role,init}, D) ->
Ssh = case Role of
client ->
{MsgReq, Ssh2} = ssh_auth:service_request_msg(Ssh1),
- ok = send_bytes(MsgReq, D),
+ send_bytes(MsgReq, D),
Ssh2;
server ->
Ssh1
@@ -680,7 +682,7 @@ handle_event(_, Msg = #ssh_msg_service_request{name=ServiceName}, StateName = {s
"ssh-userauth" ->
Ssh0 = #ssh{session_id=SessionId} = D#data.ssh_params,
{ok, {Reply, Ssh}} = ssh_auth:handle_userauth_request(Msg, SessionId, Ssh0),
- ok = send_bytes(Reply, D),
+ send_bytes(Reply, D),
{next_state, {userauth,server}, D#data{ssh_params = Ssh}};
_ ->
@@ -692,7 +694,7 @@ handle_event(_, Msg = #ssh_msg_service_request{name=ServiceName}, StateName = {s
handle_event(_, #ssh_msg_service_accept{name = "ssh-userauth"}, {service_request,client},
#data{ssh_params = #ssh{service="ssh-userauth"} = Ssh0} = State) ->
{Msg, Ssh} = ssh_auth:init_userauth_request_msg(Ssh0),
- ok = send_bytes(Msg, State),
+ send_bytes(Msg, State),
{next_state, {userauth,client}, State#data{auth_user = Ssh#ssh.user, ssh_params = Ssh}};
@@ -709,7 +711,7 @@ handle_event(_,
%% Probably the very first userauth_request but we deny unauthorized login
{not_authorized, _, {Reply,Ssh}} =
ssh_auth:handle_userauth_request(Msg, Ssh0#ssh.session_id, Ssh0),
- ok = send_bytes(Reply, D),
+ send_bytes(Reply, D),
{keep_state, D#data{ssh_params = Ssh}};
{"ssh-connection", "ssh-connection", Method} ->
@@ -719,7 +721,7 @@ handle_event(_,
%% Yepp! we support this method
case ssh_auth:handle_userauth_request(Msg, Ssh0#ssh.session_id, Ssh0) of
{authorized, User, {Reply, Ssh}} ->
- ok = send_bytes(Reply, D),
+ send_bytes(Reply, D),
D#data.starter ! ssh_connected,
connected_fun(User, Method, D),
{next_state, {connected,server},
@@ -727,11 +729,11 @@ handle_event(_,
ssh_params = Ssh#ssh{authenticated = true}}};
{not_authorized, {User, Reason}, {Reply, Ssh}} when Method == "keyboard-interactive" ->
retry_fun(User, Reason, D),
- ok = send_bytes(Reply, D),
+ send_bytes(Reply, D),
{next_state, {userauth_keyboard_interactive,server}, D#data{ssh_params = Ssh}};
{not_authorized, {User, Reason}, {Reply, Ssh}} ->
retry_fun(User, Reason, D),
- ok = send_bytes(Reply, D),
+ send_bytes(Reply, D),
{keep_state, D#data{ssh_params = Ssh}}
end;
false ->
@@ -1430,18 +1432,15 @@ start_the_connection_child(UserPid, Role, Socket, Options) ->
%% Stopping
-type finalize_termination_result() :: ok .
-finalize_termination(_StateName, #data{transport_cb = Transport,
- connection_state = Connection,
- socket = Socket}) ->
- case Connection of
+finalize_termination(_StateName, D) ->
+ case D#data.connection_state of
#connection{system_supervisor = SysSup,
sub_system_supervisor = SubSysSup} when is_pid(SubSysSup) ->
ssh_system_sup:stop_subsystem(SysSup, SubSysSup);
_ ->
do_nothing
end,
- (catch Transport:close(Socket)),
- ok.
+ close_transport(D).
%%--------------------------------------------------------------------
%% "Invert" the Role
@@ -1496,8 +1495,33 @@ send_msg(Msg, State=#data{ssh_params=Ssh0}) when is_tuple(Msg) ->
send_bytes(Bytes, State),
State#data{ssh_params=Ssh}.
-send_bytes(Bytes, #data{socket = Socket, transport_cb = Transport}) ->
- Transport:send(Socket, Bytes).
+send_bytes(Bytes, #data{sender = Sender}) ->
+ Sender ! {send,Bytes},
+ ok.
+
+close_transport(D) ->
+ D#data.sender ! close,
+ ok.
+
+
+nonblocking_sender(Socket, Callback) ->
+ receive
+ {send, Bytes} ->
+ case Callback:send(Socket, Bytes) of
+ ok ->
+ nonblocking_sender(Socket, Callback);
+ E = {error,_} ->
+ exit({shutdown,E})
+ end;
+
+ close ->
+ case Callback:close(Socket) of
+ ok ->
+ ok;
+ E = {error,_} ->
+ exit({shutdown,E})
+ end
+ end.
handle_version({2, 0} = NumVsn, StrVsn, Ssh0) ->
Ssh = counterpart_versions(NumVsn, StrVsn, Ssh0),
diff --git a/lib/ssh/test/ssh_algorithms_SUITE.erl b/lib/ssh/test/ssh_algorithms_SUITE.erl
index 0f68130a05..8b2db0e1a8 100644
--- a/lib/ssh/test/ssh_algorithms_SUITE.erl
+++ b/lib/ssh/test/ssh_algorithms_SUITE.erl
@@ -180,21 +180,19 @@ simple_exec(Config) ->
%%--------------------------------------------------------------------
%% Testing if no group matches
simple_exec_groups_no_match_too_small(Config) ->
- try simple_exec_group({400,500,600}, Config)
- of
- _ -> ct:fail("Exec though no group available")
- catch
- error:{badmatch,{error,"No possible diffie-hellman-group-exchange group found"}} ->
- ok
- end.
+ try_exec_simple_group({400,500,600}, Config).
simple_exec_groups_no_match_too_large(Config) ->
- try simple_exec_group({9200,9500,9700}, Config)
+ try_exec_simple_group({9200,9500,9700}, Config).
+
+
+try_exec_simple_group(Group, Config) ->
+ try simple_exec_group(Group, Config)
of
_ -> ct:fail("Exec though no group available")
catch
- error:{badmatch,{error,"No possible diffie-hellman-group-exchange group found"}} ->
- ok
+ error:{badmatch,{error,"No possible diffie-hellman-group-exchange group found"}} -> ok;
+ error:{badmatch,{error,"Connection closed"}} -> ok
end.
%%--------------------------------------------------------------------
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-16 01:24:08 +0000