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-rw-r--r--lib/ssh/src/ssh.erl6
-rw-r--r--lib/ssh/src/ssh_connection_handler.erl7
-rw-r--r--lib/ssh/src/ssh_sftp.erl26
-rw-r--r--lib/ssh/src/ssh_transport.erl84
4 files changed, 91 insertions, 32 deletions
diff --git a/lib/ssh/src/ssh.erl b/lib/ssh/src/ssh.erl
index 51ad691ba2..d4b02a024e 100644
--- a/lib/ssh/src/ssh.erl
+++ b/lib/ssh/src/ssh.erl
@@ -347,6 +347,8 @@ handle_option([parallel_login|Rest], SocketOptions, SshOptions) ->
handle_option(Rest, SocketOptions, [handle_ssh_option({parallel_login,true}) | SshOptions]);
handle_option([{minimal_remote_max_packet_size, _} = Opt|Rest], SocketOptions, SshOptions) ->
handle_option(Rest, SocketOptions, [handle_ssh_option(Opt) | SshOptions]);
+handle_option([{id_string, _ID} = Opt|Rest], SocketOptions, SshOptions) ->
+ handle_option(Rest, SocketOptions, [handle_ssh_option(Opt) | SshOptions]);
handle_option([Opt | Rest], SocketOptions, SshOptions) ->
handle_option(Rest, [handle_inet_option(Opt) | SocketOptions], SshOptions).
@@ -439,6 +441,10 @@ handle_ssh_option({idle_time, Value} = Opt) when is_integer(Value), Value > 0 ->
Opt;
handle_ssh_option({rekey_limit, Value} = Opt) when is_integer(Value) ->
Opt;
+handle_ssh_option({id_string, random}) ->
+ {id_string, {random,2,5}}; %% 2 - 5 random characters
+handle_ssh_option({id_string, ID} = Opt) when is_list(ID) ->
+ Opt;
handle_ssh_option(Opt) ->
throw({error, {eoptions, Opt}}).
diff --git a/lib/ssh/src/ssh_connection_handler.erl b/lib/ssh/src/ssh_connection_handler.erl
index e1f2e059e8..4dea284071 100644
--- a/lib/ssh/src/ssh_connection_handler.erl
+++ b/lib/ssh/src/ssh_connection_handler.erl
@@ -70,6 +70,7 @@
undecoded_packet_length, % integer()
key_exchange_init_msg, % #ssh_msg_kexinit{}
renegotiate = false, % boolean()
+ last_size_rekey = 0,
connection_queue,
address,
port,
@@ -635,7 +636,8 @@ handle_event(renegotiate, StateName, State) ->
%% Rekey due to sent data limit reached?
handle_event(data_size, connected, #state{ssh_params = Ssh0} = State) ->
- {ok, [{send_oct,Sent}]} = inet:getstat(State#state.socket, [send_oct]),
+ {ok, [{send_oct,Sent0}]} = inet:getstat(State#state.socket, [send_oct]),
+ Sent = Sent0 - State#state.last_size_rekey,
MaxSent = proplists:get_value(rekey_limit, State#state.opts, 1024000000),
timer:apply_after(?REKEY_DATA_TIMOUT, gen_fsm, send_all_state_event, [self(), data_size]),
case Sent >= MaxSent of
@@ -645,7 +647,8 @@ handle_event(data_size, connected, #state{ssh_params = Ssh0} = State) ->
{next_state, kexinit,
next_packet(State#state{ssh_params = Ssh,
key_exchange_init_msg = KeyInitMsg,
- renegotiate = true})};
+ renegotiate = true,
+ last_size_rekey = Sent0})};
_ ->
{next_state, connected, next_packet(State)}
end;
diff --git a/lib/ssh/src/ssh_sftp.erl b/lib/ssh/src/ssh_sftp.erl
index 613f8f25b2..bab688f226 100644
--- a/lib/ssh/src/ssh_sftp.erl
+++ b/lib/ssh/src/ssh_sftp.erl
@@ -111,7 +111,7 @@ start_channel(Cm, Opts) when is_pid(Cm) ->
TimeOut
end;
{error, Reason} ->
- {error, Reason};
+ {error, format_channel_start_error(Reason)};
ignore ->
{error, ignore}
end;
@@ -136,7 +136,7 @@ start_channel(Host, Port, Opts) ->
TimeOut
end;
{error, Reason} ->
- {error, Reason};
+ {error, format_channel_start_error(Reason)};
ignore ->
{error, ignore}
end;
@@ -491,9 +491,9 @@ init([Cm, ChannelId, Options]) ->
inf = new_inf(),
opts = Options}};
failure ->
- {stop, "server failed to start sftp subsystem"};
+ {stop, {shutdown, "server failed to start sftp subsystem"}};
Error ->
- {stop, Error}
+ {stop, {shutdown, Error}}
end.
%%--------------------------------------------------------------------
@@ -508,12 +508,12 @@ init([Cm, ChannelId, Options]) ->
%%--------------------------------------------------------------------
handle_call({{timeout, infinity}, wait_for_version_negotiation}, From,
#state{xf = #ssh_xfer{vsn = undefined} = Xf} = State) ->
- {noreply, State#state{xf = Xf#ssh_xfer{vsn = From}}};
+ {noreply, State#state{xf = Xf#ssh_xfer{vsn = {wait, From, undefined}}}};
handle_call({{timeout, Timeout}, wait_for_version_negotiation}, From,
#state{xf = #ssh_xfer{vsn = undefined} = Xf} = State) ->
- timer:send_after(Timeout, {timeout, undefined, From}),
- {noreply, State#state{xf = Xf#ssh_xfer{vsn = From}}};
+ TRef = erlang:send_after(Timeout, self(), {timeout, undefined, From}),
+ {noreply, State#state{xf = Xf#ssh_xfer{vsn = {wait, From, TRef}}}};
handle_call({_, wait_for_version_negotiation}, _, State) ->
{reply, ok, State};
@@ -865,7 +865,12 @@ do_handle_reply(#state{xf = Xf} = State,
case Xf#ssh_xfer.vsn of
undefined ->
ok;
- From ->
+ {wait, From, TRef} ->
+ if is_reference(TRef) ->
+ erlang:cancel_timer(TRef);
+ true ->
+ ok
+ end,
ssh_channel:reply(From, ok)
end,
State#state{xf = Xf#ssh_xfer{vsn = Version, ext = Ext}, rep_buf = Rest};
@@ -1412,3 +1417,8 @@ open_buf1(Pid, BufInfo0, FileOpTimeout, CryptoState, ChunkSize) ->
BufHandle = make_ref(),
call(Pid, {put_bufinf,BufHandle,BufInfo}, FileOpTimeout),
{ok,BufHandle}.
+
+format_channel_start_error({shutdown, Reason}) ->
+ Reason;
+format_channel_start_error(Reason) ->
+ Reason.
diff --git a/lib/ssh/src/ssh_transport.erl b/lib/ssh/src/ssh_transport.erl
index 76fa776113..d6414bab6c 100644
--- a/lib/ssh/src/ssh_transport.erl
+++ b/lib/ssh/src/ssh_transport.erl
@@ -44,12 +44,34 @@
versions(client, Options)->
Vsn = proplists:get_value(vsn, Options, ?DEFAULT_CLIENT_VERSION),
- Version = format_version(Vsn),
- {Vsn, Version};
+ {Vsn, format_version(Vsn, software_version(Options))};
versions(server, Options) ->
Vsn = proplists:get_value(vsn, Options, ?DEFAULT_SERVER_VERSION),
- Version = format_version(Vsn),
- {Vsn, Version}.
+ {Vsn, format_version(Vsn, software_version(Options))}.
+
+software_version(Options) ->
+ case proplists:get_value(id_string, Options) of
+ undefined ->
+ "Erlang"++ssh_vsn();
+ {random,Nlo,Nup} ->
+ random_id(Nlo,Nup);
+ ID ->
+ ID
+ end.
+
+ssh_vsn() ->
+ try {ok,L} = application:get_all_key(ssh),
+ proplists:get_value(vsn,L,"")
+ of
+ "" -> "";
+ VSN when is_list(VSN) -> "/" ++ VSN;
+ _ -> ""
+ catch
+ _:_ -> ""
+ end.
+
+random_id(Nlo, Nup) ->
+ [crypto:rand_uniform($a,$z+1) || _<- lists:duplicate(crypto:rand_uniform(Nlo,Nup+1),x) ].
hello_version_msg(Data) ->
[Data,"\r\n"].
@@ -77,9 +99,9 @@ is_valid_mac(Mac, Data, #ssh{recv_mac = Algorithm,
yes_no(Ssh, Prompt) ->
(Ssh#ssh.io_cb):yes_no(Prompt, Ssh).
-format_version({Major,Minor}) ->
+format_version({Major,Minor}, SoftwareVersion) ->
"SSH-" ++ integer_to_list(Major) ++ "." ++
- integer_to_list(Minor) ++ "-Erlang".
+ integer_to_list(Minor) ++ "-" ++ SoftwareVersion.
handle_hello_version(Version) ->
try
@@ -218,20 +240,30 @@ key_exchange_first_msg('diffie-hellman-group-exchange-sha1', Ssh0) ->
handle_kexdh_init(#ssh_msg_kexdh_init{e = E}, Ssh0) ->
{G, P} = dh_group1(),
- {Private, Public} = dh_gen_key(G, P, 1024),
- K = ssh_math:ipow(E, Private, P),
- Key = get_host_key(Ssh0),
- H = kex_h(Ssh0, Key, E, Public, K),
- H_SIG = sign_host_key(Ssh0, Key, H),
- {SshPacket, Ssh1} = ssh_packet(#ssh_msg_kexdh_reply{public_host_key = Key,
- f = Public,
- h_sig = H_SIG
- }, Ssh0),
-
- {ok, SshPacket, Ssh1#ssh{keyex_key = {{Private, Public}, {G, P}},
- shared_secret = K,
- exchanged_hash = H,
- session_id = sid(Ssh1, H)}}.
+ if
+ 1=<E, E=<(P-1) ->
+ {Private, Public} = dh_gen_key(G, P, 1024),
+ K = ssh_math:ipow(E, Private, P),
+ Key = get_host_key(Ssh0),
+ H = kex_h(Ssh0, Key, E, Public, K),
+ H_SIG = sign_host_key(Ssh0, Key, H),
+ {SshPacket, Ssh1} = ssh_packet(#ssh_msg_kexdh_reply{public_host_key = Key,
+ f = Public,
+ h_sig = H_SIG
+ }, Ssh0),
+
+ {ok, SshPacket, Ssh1#ssh{keyex_key = {{Private, Public}, {G, P}},
+ shared_secret = K,
+ exchanged_hash = H,
+ session_id = sid(Ssh1, H)}};
+ true ->
+ Error = {error,bad_e_from_peer},
+ Disconnect = #ssh_msg_disconnect{
+ code = ?SSH_DISCONNECT_KEY_EXCHANGE_FAILED,
+ description = "Key exchange failed, 'f' out of bounds",
+ language = "en"},
+ throw({Error, Disconnect})
+ end.
handle_kex_dh_gex_group(#ssh_msg_kex_dh_gex_group{p = P, g = G}, Ssh0) ->
{Private, Public} = dh_gen_key(G,P,1024),
@@ -255,7 +287,7 @@ handle_new_keys(#ssh_msg_newkeys{}, Ssh0) ->
%% %% Select algorithms
handle_kexdh_reply(#ssh_msg_kexdh_reply{public_host_key = HostKey, f = F,
h_sig = H_SIG},
- #ssh{keyex_key = {{Private, Public}, {_G, P}}} = Ssh0) ->
+ #ssh{keyex_key = {{Private, Public}, {_G, P}}} = Ssh0) when 1=<F, F=<(P-1)->
K = ssh_math:ipow(F, Private, P),
H = kex_h(Ssh0, HostKey, Public, F, K),
@@ -271,7 +303,15 @@ handle_kexdh_reply(#ssh_msg_kexdh_reply{public_host_key = HostKey, f = F,
description = "Key exchange failed",
language = "en"},
throw({Error, Disconnect})
- end.
+ end;
+handle_kexdh_reply(#ssh_msg_kexdh_reply{}, _SSH) ->
+ Error = {error,bad_f_from_peer},
+ Disconnect = #ssh_msg_disconnect{
+ code = ?SSH_DISCONNECT_KEY_EXCHANGE_FAILED,
+ description = "Key exchange failed, 'f' out of bounds",
+ language = "en"},
+ throw({Error, Disconnect}).
+
handle_kex_dh_gex_request(#ssh_msg_kex_dh_gex_request{min = _Min,
n = _NBits,
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-16 02:48:41 +0000