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-rw-r--r--lib/ssh/src/ssh_connection_handler.erl23
-rw-r--r--lib/ssh/src/ssh_file.erl17
-rw-r--r--lib/ssh/src/ssh_options.erl76
-rw-r--r--lib/ssh/src/ssh_transport.erl32
4 files changed, 96 insertions, 52 deletions
diff --git a/lib/ssh/src/ssh_connection_handler.erl b/lib/ssh/src/ssh_connection_handler.erl
index 342583306b..6a6b9896cb 100644
--- a/lib/ssh/src/ssh_connection_handler.erl
+++ b/lib/ssh/src/ssh_connection_handler.erl
@@ -434,11 +434,7 @@ init_ssh_record(Role, Socket, Opts) ->
init_ssh_record(Role, _Socket, PeerAddr, Opts) ->
KeyCb = ?GET_OPT(key_cb, Opts),
- AuthMethods =
- case Role of
- server -> ?GET_OPT(auth_methods, Opts);
- client -> undefined
- end,
+ AuthMethods = ?GET_OPT(auth_methods, Opts),
S0 = #ssh{role = Role,
key_cb = KeyCb,
opts = Opts,
@@ -1705,15 +1701,18 @@ handle_ssh_msg_ext_info(#ssh_msg_ext_info{data=Data}, D0) ->
lists:foldl(fun ext_info/2, D0, Data).
-ext_info({"server-sig-algs",SigAlgs}, D0 = #data{ssh_params=#ssh{role=client}=Ssh0}) ->
+ext_info({"server-sig-algs",SigAlgs}, D0 = #data{ssh_params=#ssh{role=client,
+ userauth_pubkeys=ClientSigAlgs}=Ssh0}) ->
%% Make strings to eliminate risk of beeing bombed with odd strings that fills the atom table:
SupportedAlgs = lists:map(fun erlang:atom_to_list/1, ssh_transport:supported_algorithms(public_key)),
- Ssh = Ssh0#ssh{userauth_pubkeys =
- [list_to_atom(SigAlg) || SigAlg <- string:tokens(SigAlgs,","),
- %% length of SigAlg is implicitly checked by member:
- lists:member(SigAlg, SupportedAlgs)
- ]},
- D0#data{ssh_params = Ssh};
+ ServerSigAlgs = [list_to_atom(SigAlg) || SigAlg <- string:tokens(SigAlgs,","),
+ %% length of SigAlg is implicitly checked by the comparison
+ %% in member/2:
+ lists:member(SigAlg, SupportedAlgs)
+ ],
+ CommonAlgs = [Alg || Alg <- ServerSigAlgs,
+ lists:member(Alg, ClientSigAlgs)],
+ D0#data{ssh_params = Ssh0#ssh{userauth_pubkeys = CommonAlgs} };
ext_info(_, D0) ->
%% Not implemented
diff --git a/lib/ssh/src/ssh_file.erl b/lib/ssh/src/ssh_file.erl
index 6692432fcf..33792da38f 100644
--- a/lib/ssh/src/ssh_file.erl
+++ b/lib/ssh/src/ssh_file.erl
@@ -75,10 +75,7 @@ host_key(Algorithm, Opts) ->
Password = proplists:get_value(identity_pass_phrase(Algorithm), Opts, ignore),
case decode(File, Password) of
{ok,Key} ->
- case ssh_transport:valid_key_sha_alg(Key,Algorithm) of
- true -> {ok,Key};
- false -> {error,bad_keytype_in_file}
- end;
+ check_key_type(Key, Algorithm);
{error,DecodeError} ->
{error,DecodeError}
end.
@@ -104,10 +101,20 @@ is_host_key(Key, PeerName, Algorithm, Opts) ->
user_key(Algorithm, Opts) ->
File = file_name(user, identity_key_filename(Algorithm), Opts),
Password = proplists:get_value(identity_pass_phrase(Algorithm), Opts, ignore),
- decode(File, Password).
+ case decode(File, Password) of
+ {ok, Key} ->
+ check_key_type(Key, Algorithm);
+ Error ->
+ Error
+ end.
%% Internal functions %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+check_key_type(Key, Algorithm) ->
+ case ssh_transport:valid_key_sha_alg(Key,Algorithm) of
+ true -> {ok,Key};
+ false -> {error,bad_keytype_in_file}
+ end.
file_base_name('ssh-rsa' ) -> "ssh_host_rsa_key";
file_base_name('rsa-sha2-256' ) -> "ssh_host_rsa_key";
diff --git a/lib/ssh/src/ssh_options.erl b/lib/ssh/src/ssh_options.erl
index 0886d5b34d..12c0190082 100644
--- a/lib/ssh/src/ssh_options.erl
+++ b/lib/ssh/src/ssh_options.erl
@@ -293,12 +293,6 @@ default(server) ->
class => user_options
},
- {auth_methods, def} =>
- #{default => ?SUPPORTED_AUTH_METHODS,
- chk => fun check_string/1,
- class => user_options
- },
-
{auth_method_kb_interactive_data, def} =>
#{default => undefined, % Default value can be constructed when User is known
chk => fun({S1,S2,S3,B}) ->
@@ -398,6 +392,12 @@ default(server) ->
class => user_options
},
+ {preferred_algorithms, def} =>
+ #{default => ssh:default_algorithms(),
+ chk => fun check_preferred_algorithms/1,
+ class => user_options
+ },
+
%%%%% Undocumented
{infofun, def} =>
#{default => fun(_,_,_) -> void end,
@@ -436,12 +436,24 @@ default(client) ->
},
{pref_public_key_algs, def} =>
- #{default =>
- ssh_transport:supported_algorithms(public_key),
- chk =>
- fun check_pref_public_key_algs/1,
- class =>
- ssh
+ #{default => ssh_transport:default_algorithms(public_key) -- ['rsa-sha2-256',
+ 'rsa-sha2-512'],
+ chk => fun check_pref_public_key_algs/1,
+ class => user_options
+ },
+
+ {preferred_algorithms, def} =>
+ #{default => [{K,Vs} || {K,Vs0} <- ssh:default_algorithms(),
+ Vs <- [case K of
+ public_key ->
+ Vs0 -- ['rsa-sha2-256',
+ 'rsa-sha2-512'];
+ _ ->
+ Vs0
+ end]
+ ],
+ chk => fun check_preferred_algorithms/1,
+ class => user_options
},
{dh_gex_limits, def} =>
@@ -509,12 +521,6 @@ default(common) ->
class => user_options
},
- {preferred_algorithms, def} =>
- #{default => ssh:default_algorithms(),
- chk => fun check_preferred_algorithms/1,
- class => user_options
- },
-
{id_string, def} =>
#{default => undefined, % FIXME: see ssh_transport:ssh_vsn/0
chk => fun(random) ->
@@ -582,6 +588,21 @@ default(common) ->
class => user_options
},
+ {auth_methods, def} =>
+ #{default => ?SUPPORTED_AUTH_METHODS,
+ chk => fun(As) ->
+ try
+ Sup = string:tokens(?SUPPORTED_AUTH_METHODS, ","),
+ New = string:tokens(As, ","),
+ [] == [X || X <- New,
+ not lists:member(X,Sup)]
+ catch
+ _:_ -> false
+ end
+ end,
+ class => user_options
+ },
+
%%%%% Undocumented
{transport, def} =>
#{default => ?DEFAULT_TRANSPORT,
@@ -808,16 +829,23 @@ valid_hash(X, _) -> error_in_check(X, "Expect atom or list in fingerprint spec"
%%%----------------------------------------------------------------
check_preferred_algorithms(Algs) ->
+ [error_in_check(K,"Bad preferred_algorithms key")
+ || {K,_} <- Algs,
+ not lists:keymember(K,1,ssh:default_algorithms())],
+
try alg_duplicates(Algs, [], [])
of
[] ->
{true,
- [try ssh_transport:supported_algorithms(Key)
- of
- DefAlgs -> handle_pref_alg(Key,Vals,DefAlgs)
- catch
- _:_ -> error_in_check(Key,"Bad preferred_algorithms key")
- end || {Key,Vals} <- Algs]
+ [case proplists:get_value(Key, Algs) of
+ undefined ->
+ {Key,DefAlgs};
+ Vals ->
+ handle_pref_alg(Key,Vals,SupAlgs)
+ end
+ || {{Key,DefAlgs}, {Key,SupAlgs}} <- lists:zip(ssh:default_algorithms(),
+ ssh_transport:supported_algorithms())
+ ]
};
Dups ->
diff --git a/lib/ssh/src/ssh_transport.erl b/lib/ssh/src/ssh_transport.erl
index 25c64a4f25..1a15798080 100644
--- a/lib/ssh/src/ssh_transport.erl
+++ b/lib/ssh/src/ssh_transport.erl
@@ -92,10 +92,7 @@ default_algorithms(cipher) ->
default_algorithms(mac) ->
supported_algorithms(mac, same(['AEAD_AES_128_GCM',
'AEAD_AES_256_GCM']));
-default_algorithms(public_key) ->
- supported_algorithms(public_key, ['rsa-sha2-256',
- 'rsa-sha2-384',
- 'rsa-sha2-512']);
+
default_algorithms(Alg) ->
supported_algorithms(Alg, []).
@@ -122,10 +119,9 @@ supported_algorithms(public_key) ->
{'ecdsa-sha2-nistp384', [{public_keys,ecdsa}, {hashs,sha384}, {ec_curve,secp384r1}]},
{'ecdsa-sha2-nistp521', [{public_keys,ecdsa}, {hashs,sha512}, {ec_curve,secp521r1}]},
{'ecdsa-sha2-nistp256', [{public_keys,ecdsa}, {hashs,sha256}, {ec_curve,secp256r1}]},
+ {'ssh-rsa', [{public_keys,rsa}, {hashs,sha} ]},
{'rsa-sha2-256', [{public_keys,rsa}, {hashs,sha256} ]},
- {'rsa-sha2-384', [{public_keys,rsa}, {hashs,sha384} ]},
{'rsa-sha2-512', [{public_keys,rsa}, {hashs,sha512} ]},
- {'ssh-rsa', [{public_keys,rsa}, {hashs,sha} ]},
{'ssh-dss', [{public_keys,dss}, {hashs,sha} ]} % Gone in OpenSSH 7.3.p1
]);
@@ -724,14 +720,28 @@ kex_ext_info(Role, Opts) ->
end.
ext_info_message(#ssh{role=client,
- send_ext_info=true} = Ssh0) ->
- %% FIXME: no extensions implemented
- {ok, "", Ssh0};
+ send_ext_info=true,
+ opts=Opts} = Ssh0) ->
+ %% Since no extension sent by the client is implemented, we add a fake one
+ %% to be able to test the framework.
+ %% Remove this when there is one and update ssh_protocol_SUITE whare it is used.
+ case proplists:get_value(ext_info_client, ?GET_OPT(tstflg,Opts)) of
+ true ->
+ Msg = #ssh_msg_ext_info{nr_extensions = 1,
+ data = [{"[email protected]", "Testing,PleaseIgnore"}]
+ },
+ {SshPacket, Ssh} = ssh_packet(Msg, Ssh0),
+ {ok, SshPacket, Ssh};
+ _ ->
+ {ok, "", Ssh0}
+ end;
ext_info_message(#ssh{role=server,
- send_ext_info=true} = Ssh0) ->
+ send_ext_info=true,
+ opts = Opts} = Ssh0) ->
AlgsList = lists:map(fun erlang:atom_to_list/1,
- ssh_transport:default_algorithms(public_key)),
+ proplists:get_value(public_key,
+ ?GET_OPT(preferred_algorithms, Opts))),
Msg = #ssh_msg_ext_info{nr_extensions = 1,
data = [{"server-sig-algs", string:join(AlgsList,",")}]
},
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-08 05:03:15 +0000