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authorFredrik Gustafsson <[email protected]>2012-11-08 13:47:33 +0100
committerFredrik Gustafsson <[email protected]>2013-02-15 11:35:16 +0100
commitdde4bc77cd5be76102cd913c1c931844856ad76e (patch)
tree451efdb56a9723d445d3ff0cf63c7697f5c19c1f /lib/ssh
parentad9e9bc79f01451df7f18f79a9b44afb71b05851 (diff)
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Returning the actual reason why key exchange failed
Diffstat (limited to 'lib/ssh')
-rw-r--r--lib/ssh/src/ssh_connection_handler.erl13
-rw-r--r--lib/ssh/src/ssh_connection_manager.erl49
-rw-r--r--lib/ssh/src/ssh_transport.erl10
3 files changed, 62 insertions, 10 deletions
diff --git a/lib/ssh/src/ssh_connection_handler.erl b/lib/ssh/src/ssh_connection_handler.erl
index 787d82c4db..74a6ac7d19 100644
--- a/lib/ssh/src/ssh_connection_handler.erl
+++ b/lib/ssh/src/ssh_connection_handler.erl
@@ -223,11 +223,13 @@ key_exchange(#ssh_msg_kexdh_reply{} = Msg,
catch
#ssh_msg_disconnect{} = DisconnectMsg ->
handle_disconnect(DisconnectMsg, State);
+ {ErrorToDisplay, #ssh_msg_disconnect{} = DisconnectMsg} ->
+ handle_disconnect(DisconnectMsg, State, ErrorToDisplay);
_:Error ->
Desc = log_error(Error),
handle_disconnect(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_KEY_EXCHANGE_FAILED,
- description = Desc,
- language = "en"}, State)
+ description = Desc,
+ language = "en"}, State)
end;
key_exchange(#ssh_msg_kex_dh_gex_group{} = Msg,
@@ -673,6 +675,11 @@ terminate({shutdown, #ssh_msg_disconnect{} = Msg}, StateName, #state{ssh_params
send_msg(SshPacket, State),
ssh_connection_manager:event(Pid, Msg),
terminate(normal, StateName, State#state{ssh_params = Ssh});
+terminate({shutdown, {#ssh_msg_disconnect{} = Msg, ErrorMsg}}, StateName, #state{ssh_params = Ssh0, manager = Pid} = State) ->
+ {SshPacket, Ssh} = ssh_transport:ssh_packet(Msg, Ssh0),
+ send_msg(SshPacket, State),
+ ssh_connection_manager:event(Pid, Msg, ErrorMsg),
+ terminate(normal, StateName, State#state{ssh_params = Ssh});
terminate(Reason, StateName, #state{ssh_params = Ssh0, manager = Pid} = State) ->
log_error(Reason),
DisconnectMsg =
@@ -950,6 +957,8 @@ handle_ssh_packet(Length, StateName, #state{decoded_data_buffer = DecData0,
handle_disconnect(#ssh_msg_disconnect{} = Msg, State) ->
{stop, {shutdown, Msg}, State}.
+handle_disconnect(#ssh_msg_disconnect{} = Msg, State, ErrorMsg) ->
+ {stop, {shutdown, {Msg, ErrorMsg}}, State}.
counterpart_versions(NumVsn, StrVsn, #ssh{role = server} = Ssh) ->
Ssh#ssh{c_vsn = NumVsn , c_version = StrVsn};
diff --git a/lib/ssh/src/ssh_connection_manager.erl b/lib/ssh/src/ssh_connection_manager.erl
index 94a9ed505f..45b95495f1 100644
--- a/lib/ssh/src/ssh_connection_manager.erl
+++ b/lib/ssh/src/ssh_connection_manager.erl
@@ -40,8 +40,7 @@
close/2, stop/1, send/5,
send_eof/2]).
--export([open_channel/6, reply_request/3, request/6, request/7, global_request/4, event/2,
- cast/2]).
+-export([open_channel/6, reply_request/3, request/6, request/7, global_request/4, event/2,cast/2]).
%% Internal application API and spawn
-export([send_msg/1, ssh_channel_info_handler/3]).
@@ -110,10 +109,11 @@ global_request(ConnectionManager, Type, true = Reply, Data) ->
global_request(ConnectionManager, Type, false = Reply, Data) ->
cast(ConnectionManager, {global_request, self(), Type, Reply, Data}).
-
+
+event(ConnectionManager, BinMsg, ErrorMsg) ->
+ call(ConnectionManager, {ssh_msg, self(), BinMsg, ErrorMsg}).
event(ConnectionManager, BinMsg) ->
call(ConnectionManager, {ssh_msg, self(), BinMsg}).
-
info(ConnectionManager) ->
info(ConnectionManager, {info, all}).
@@ -262,8 +262,7 @@ handle_call({ssh_msg, Pid, Msg}, From,
%% To avoid that not all data sent by the other side is processes before
%% possible crash in ssh_connection_handler takes down the connection.
- gen_server:reply(From, ok),
-
+ gen_server:reply(From, ok),
ConnectionMsg = decode_ssh_msg(Msg),
try ssh_connection:handle_msg(ConnectionMsg, Connection0, Pid, Role) of
{{replies, Replies}, Connection} ->
@@ -294,7 +293,45 @@ handle_call({ssh_msg, Pid, Msg}, From,
disconnect_fun(Reason, SSHOpts),
{stop, {shutdown, Error}, State#state{connection_state = Connection}}
end;
+handle_call({ssh_msg, Pid, Msg, ErrorMsg}, From,
+ #state{connection_state = Connection0,
+ role = Role, opts = Opts, connected = IsConnected,
+ client = ClientPid}
+ = State) ->
+ %% To avoid that not all data sent by the other side is processes before
+ %% possible crash in ssh_connection_handler takes down the connection.
+ gen_server:reply(From, ok),
+ ConnectionMsg = decode_ssh_msg(Msg),
+ try ssh_connection:handle_msg(ConnectionMsg, Connection0, Pid, Role) of
+ {{replies, Replies}, Connection} ->
+ lists:foreach(fun send_msg/1, Replies),
+ {noreply, State#state{connection_state = Connection}};
+ {noreply, Connection} ->
+ {noreply, State#state{connection_state = Connection}};
+ {disconnect, {_, Reason}, {{replies, Replies}, Connection}}
+ when Role == client andalso (not IsConnected) ->
+ lists:foreach(fun send_msg/1, Replies),
+ ClientPid ! {self(), not_connected, {Reason, ErrorMsg}},
+ {stop, {shutdown, normal}, State#state{connection = Connection}};
+ {disconnect, Reason, {{replies, Replies}, Connection}} ->
+ lists:foreach(fun send_msg/1, Replies),
+ SSHOpts = proplists:get_value(ssh_opts, Opts),
+ disconnect_fun(Reason, SSHOpts),
+ {stop, {shutdown, normal}, State#state{connection_state = Connection}}
+ catch
+ _:Error ->
+ {disconnect, Reason, {{replies, Replies}, Connection}} =
+ ssh_connection:handle_msg(
+ #ssh_msg_disconnect{code = ?SSH_DISCONNECT_BY_APPLICATION,
+ description = "Internal error",
+ language = "en"}, Connection0, undefined,
+ Role),
+ lists:foreach(fun send_msg/1, Replies),
+ SSHOpts = proplists:get_value(ssh_opts, Opts),
+ disconnect_fun(Reason, SSHOpts),
+ {stop, {shutdown, Error}, State#state{connection_state = Connection}}
+ end;
handle_call({global_request, Pid, _, _, _} = Request, From,
#state{connection_state =
#connection{channel_cache = Cache}} = State0) ->
diff --git a/lib/ssh/src/ssh_transport.erl b/lib/ssh/src/ssh_transport.erl
index 1abb69921d..8f81cdde5e 100644
--- a/lib/ssh/src/ssh_transport.erl
+++ b/lib/ssh/src/ssh_transport.erl
@@ -356,12 +356,18 @@ handle_kexdh_reply(#ssh_msg_kexdh_reply{public_host_key = HostKey, f = F,
{ok, SshPacket, Ssh#ssh{shared_secret = K,
exchanged_hash = H,
session_id = sid(Ssh, H)}};
- _Error ->
+ Error ->
Disconnect = #ssh_msg_disconnect{
code = ?SSH_DISCONNECT_KEY_EXCHANGE_FAILED,
description = "Key exchange failed",
language = "en"},
- throw(Disconnect)
+ ErrorMsg = case Error of
+ {error, rejected} ->
+ {error, {rejected, {hostkey, HostKey}}};
+ _ ->
+ Error
+ end,
+ throw({ErrorMsg, Disconnect})
end.
handle_kex_dh_gex_request(#ssh_msg_kex_dh_gex_request{min = _Min,