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-rw-r--r--lib/ssh/src/ssh_auth.erl112
1 files changed, 61 insertions, 51 deletions
diff --git a/lib/ssh/src/ssh_auth.erl b/lib/ssh/src/ssh_auth.erl
index a91b8c200e..0c16e19701 100644
--- a/lib/ssh/src/ssh_auth.erl
+++ b/lib/ssh/src/ssh_auth.erl
@@ -31,8 +31,7 @@
-export([publickey_msg/1, password_msg/1, keyboard_interactive_msg/1,
service_request_msg/1, init_userauth_request_msg/1,
userauth_request_msg/1, handle_userauth_request/3,
- handle_userauth_info_request/3, handle_userauth_info_response/2,
- default_public_key_algorithms/0
+ handle_userauth_info_request/3, handle_userauth_info_response/2
]).
%%--------------------------------------------------------------------
@@ -42,27 +41,29 @@ publickey_msg([Alg, #ssh{user = User,
session_id = SessionId,
service = Service,
opts = Opts} = Ssh]) ->
-
Hash = sha, %% Maybe option?!
KeyCb = proplists:get_value(key_cb, Opts, ssh_file),
-
case KeyCb:user_key(Alg, Opts) of
{ok, Key} ->
StrAlgo = algorithm_string(Alg),
- PubKeyBlob = encode_public_key(Key),
- SigData = build_sig_data(SessionId,
- User, Service, PubKeyBlob, StrAlgo),
- Sig = ssh_transport:sign(SigData, Hash, Key),
- SigBlob = list_to_binary([?string(StrAlgo), ?binary(Sig)]),
- ssh_transport:ssh_packet(
- #ssh_msg_userauth_request{user = User,
- service = Service,
- method = "publickey",
- data = [?TRUE,
- ?string(StrAlgo),
- ?binary(PubKeyBlob),
- ?binary(SigBlob)]},
- Ssh);
+ case encode_public_key(StrAlgo, Key) of
+ not_ok ->
+ not_ok;
+ PubKeyBlob ->
+ SigData = build_sig_data(SessionId,
+ User, Service, PubKeyBlob, StrAlgo),
+ Sig = ssh_transport:sign(SigData, Hash, Key),
+ SigBlob = list_to_binary([?string(StrAlgo), ?binary(Sig)]),
+ ssh_transport:ssh_packet(
+ #ssh_msg_userauth_request{user = User,
+ service = Service,
+ method = "publickey",
+ data = [?TRUE,
+ ?string(StrAlgo),
+ ?binary(PubKeyBlob),
+ ?binary(SigBlob)]},
+ Ssh)
+ end;
_Error ->
not_ok
end.
@@ -121,7 +122,7 @@ init_userauth_request_msg(#ssh{opts = Opts} = Ssh) ->
Algs = proplists:get_value(public_key,
proplists:get_value(preferred_algorithms, Opts, []),
- default_public_key_algorithms()),
+ ssh_transport:default_algorithms(public_key)),
Prefs = method_preference(Algs),
ssh_transport:ssh_packet(Msg, Ssh#ssh{user = User,
userauth_preference = Prefs,
@@ -153,7 +154,7 @@ userauth_request_msg(#ssh{userauth_methods = Methods,
not_ok ->
userauth_request_msg(Ssh);
Result ->
- Result
+ {Pref,Result}
end;
false ->
userauth_request_msg(Ssh)
@@ -299,8 +300,7 @@ handle_userauth_request(#ssh_msg_userauth_request{user = User,
>>
},
{not_authorized, {User, undefined},
- ssh_transport:ssh_packet(Msg, Ssh#ssh{user = User,
- kb_data = Msg
+ ssh_transport:ssh_packet(Msg, Ssh#ssh{user = User
})}
end;
@@ -313,6 +313,8 @@ handle_userauth_request(#ssh_msg_userauth_request{user = User,
#ssh_msg_userauth_failure{authentications = Methods,
partial_success = false}, Ssh)}.
+
+
handle_userauth_info_request(
#ssh_msg_userauth_info_request{name = Name,
instruction = Instr,
@@ -330,36 +332,19 @@ handle_userauth_info_request(
handle_userauth_info_response(#ssh_msg_userauth_info_response{num_responses = 1,
data = <<?UINT32(Sz), Password:Sz/binary>>},
#ssh{opts = Opts,
- kb_tries_left = KbTriesLeft0,
- kb_data = InfoMsg,
+ kb_tries_left = KbTriesLeft,
user = User,
userauth_supported_methods = Methods} = Ssh) ->
- KbTriesLeft = KbTriesLeft0 - 1,
case check_password(User, unicode:characters_to_list(Password), Opts) of
true ->
{authorized, User,
ssh_transport:ssh_packet(#ssh_msg_userauth_success{}, Ssh)};
- false when KbTriesLeft > 0 ->
- UserAuthInfoMsg =
- InfoMsg#ssh_msg_userauth_info_request{
- name = "",
- instruction =
- lists:concat(
- ["Bad user or password, try again. ",
- integer_to_list(KbTriesLeft),
- " tries left."])
- },
- {not_authorized, {User, undefined},
- ssh_transport:ssh_packet(UserAuthInfoMsg,
- Ssh#ssh{kb_tries_left = KbTriesLeft})};
-
false ->
{not_authorized, {User, {error,"Bad user or password"}},
ssh_transport:ssh_packet(#ssh_msg_userauth_failure{
authentications = Methods,
partial_success = false},
- Ssh#ssh{kb_data = undefined,
- kb_tries_left = 0}
+ Ssh#ssh{kb_tries_left = max(KbTriesLeft-1, 0)}
)}
end;
@@ -371,8 +356,6 @@ handle_userauth_info_response(#ssh_msg_userauth_info_response{},
language = "en"}).
-default_public_key_algorithms() -> ?PREFERRED_PK_ALGS.
-
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
@@ -447,10 +430,13 @@ build_sig_data(SessionId, User, Service, KeyBlob, Alg) ->
?binary(KeyBlob)],
list_to_binary(Sig).
-algorithm_string('ssh-rsa') ->
- "ssh-rsa";
-algorithm_string('ssh-dss') ->
- "ssh-dss".
+algorithm_string('ssh-rsa') -> "ssh-rsa";
+algorithm_string('ssh-dss') -> "ssh-dss";
+algorithm_string('ecdsa-sha2-nistp256') -> "ecdsa-sha2-nistp256";
+algorithm_string('ecdsa-sha2-nistp384') -> "ecdsa-sha2-nistp384";
+algorithm_string('ecdsa-sha2-nistp521') -> "ecdsa-sha2-nistp521".
+
+
decode_keyboard_interactive_prompts(_NumPrompts, Data) ->
ssh_message:decode_keyboard_interactive_prompts(Data, []).
@@ -513,11 +499,35 @@ decode_public_key_v2(<<?UINT32(Len0), _:Len0/binary,
?UINT32(Len4), Y:Len4/big-signed-integer-unit:8>>
, "ssh-dss") ->
{ok, {Y, #'Dss-Parms'{p = P, q = Q, g = G}}};
-
+decode_public_key_v2(<<?UINT32(Len0), _:Len0/binary,
+ ?UINT32(Len1), Id:Len1/binary, %% Id = <<"nistp256">> for example
+ ?UINT32(Len2), Blob:Len2/binary>>,
+ Curve) ->
+ Id =
+ case Curve of
+ "ecdsa-sha2-nistp256" -> <<"nistp256">>;
+ "ecdsa-sha2-nistp384" -> <<"nistp384">>;
+ "ecdsa-sha2-nistp521" -> <<"nistp521">>
+ end,
+ {ok, {#'ECPoint'{point=Blob}, Id}};
decode_public_key_v2(_, _) ->
{error, bad_format}.
-encode_public_key(#'RSAPrivateKey'{publicExponent = E, modulus = N}) ->
+encode_public_key("ssh-rsa", #'RSAPrivateKey'{publicExponent = E, modulus = N}) ->
ssh_bits:encode(["ssh-rsa",E,N], [string,mpint,mpint]);
-encode_public_key(#'DSAPrivateKey'{p = P, q = Q, g = G, y = Y}) ->
- ssh_bits:encode(["ssh-dss",P,Q,G,Y], [string,mpint,mpint,mpint,mpint]).
+encode_public_key("ssh-dss", #'DSAPrivateKey'{p = P, q = Q, g = G, y = Y}) ->
+ ssh_bits:encode(["ssh-dss",P,Q,G,Y], [string,mpint,mpint,mpint,mpint]);
+encode_public_key("ecdsa-sha2-"++Curve, #'ECPrivateKey'{parameters = Params,
+ publicKey = Pub}) ->
+ Id = ecdsa_id(Params),
+ if
+ Id =/= Curve ->
+ not_ok;
+ true ->
+ ssh_bits:encode(["ecdsa-sha2-"++Id, Id, Pub],
+ [string, string, binary])
+ end.
+
+ecdsa_id({namedCurve,?'secp256r1'}) -> "nistp256";
+ecdsa_id({namedCurve,?'secp384r1'}) -> "nistp384";
+ecdsa_id({namedCurve,?'secp521r1'}) -> "nistp521".
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-26 09:57:22 +0000