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-rw-r--r--lib/ssh/src/ssh_auth.erl86
1 files changed, 40 insertions, 46 deletions
diff --git a/lib/ssh/src/ssh_auth.erl b/lib/ssh/src/ssh_auth.erl
index 45fd907383..b4d406ba8d 100644
--- a/lib/ssh/src/ssh_auth.erl
+++ b/lib/ssh/src/ssh_auth.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2008-2013. All Rights Reserved.
+%% Copyright Ericsson AB 2008-2014. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
@@ -119,8 +119,7 @@ init_userauth_request_msg(#ssh{opts = Opts} = Ssh) ->
false ->
FirstAlg = proplists:get_value(public_key_alg, Opts, ?PREFERRED_PK_ALG),
SecondAlg = other_alg(FirstAlg),
- AllowUserInt = proplists:get_value(user_interaction, Opts, true),
- Prefs = method_preference(FirstAlg, SecondAlg, AllowUserInt),
+ Prefs = method_preference(FirstAlg, SecondAlg),
ssh_transport:ssh_packet(Msg, Ssh#ssh{user = User,
userauth_preference = Prefs,
userauth_methods = none,
@@ -130,15 +129,13 @@ init_userauth_request_msg(#ssh{opts = Opts} = Ssh) ->
case length(Algs) =:= 2 of
true ->
SecondAlg = other_alg(FirstAlg),
- AllowUserInt = proplists:get_value(user_interaction, Opts, true),
- Prefs = method_preference(FirstAlg, SecondAlg, AllowUserInt),
+ Prefs = method_preference(FirstAlg, SecondAlg),
ssh_transport:ssh_packet(Msg, Ssh#ssh{user = User,
userauth_preference = Prefs,
userauth_methods = none,
service = "ssh-connection"});
_ ->
- AllowUserInt = proplists:get_value(user_interaction, Opts, true),
- Prefs = method_preference(FirstAlg, AllowUserInt),
+ Prefs = method_preference(FirstAlg),
ssh_transport:ssh_packet(Msg, Ssh#ssh{user = User,
userauth_preference = Prefs,
userauth_methods = none,
@@ -256,15 +253,12 @@ handle_userauth_info_request(
data = Data}, IoCb,
#ssh{opts = Opts} = Ssh) ->
PromptInfos = decode_keyboard_interactive_prompts(NumPrompts,Data),
- Resps = keyboard_interact_get_responses(IoCb, Opts,
+ Responses = keyboard_interact_get_responses(IoCb, Opts,
Name, Instr, PromptInfos),
- RespBin = list_to_binary(
- lists:map(fun(S) -> <<?STRING(list_to_binary(S))>> end,
- Resps)),
{ok,
ssh_transport:ssh_packet(
#ssh_msg_userauth_info_response{num_responses = NumPrompts,
- data = RespBin}, Ssh)}.
+ data = Responses}, Ssh)}.
handle_userauth_info_response(#ssh_msg_userauth_info_response{},
_Auth) ->
@@ -276,25 +270,16 @@ handle_userauth_info_response(#ssh_msg_userauth_info_response{},
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
-method_preference(Alg1, Alg2, true) ->
+method_preference(Alg1, Alg2) ->
[{"publickey", ?MODULE, publickey_msg, [Alg1]},
{"publickey", ?MODULE, publickey_msg,[Alg2]},
{"password", ?MODULE, password_msg, []},
{"keyboard-interactive", ?MODULE, keyboard_interactive_msg, []}
- ];
-method_preference(Alg1, Alg2, false) ->
- [{"publickey", ?MODULE, publickey_msg, [Alg1]},
- {"publickey", ?MODULE, publickey_msg,[Alg2]},
- {"password", ?MODULE, password_msg, []}
].
-method_preference(Alg1, true) ->
+method_preference(Alg1) ->
[{"publickey", ?MODULE, publickey_msg, [Alg1]},
{"password", ?MODULE, password_msg, []},
{"keyboard-interactive", ?MODULE, keyboard_interactive_msg, []}
- ];
-method_preference(Alg1, false) ->
- [{"publickey", ?MODULE, publickey_msg, [Alg1]},
- {"password", ?MODULE, password_msg, []}
].
user_name(Opts) ->
@@ -362,35 +347,29 @@ build_sig_data(SessionId, User, Service, KeyBlob, Alg) ->
algorithm_string('ssh-rsa') ->
"ssh-rsa";
algorithm_string('ssh-dss') ->
- "ssh-dss".
+ "ssh-dss".
decode_keyboard_interactive_prompts(_NumPrompts, Data) ->
ssh_message:decode_keyboard_interactive_prompts(Data, []).
keyboard_interact_get_responses(IoCb, Opts, Name, Instr, PromptInfos) ->
NumPrompts = length(PromptInfos),
- case proplists:get_value(keyboard_interact_fun, Opts) of
- undefined when NumPrompts == 1 ->
- %% Special case/fallback for just one prompt
- %% (assumed to be the password prompt)
- case proplists:get_value(password, Opts) of
- undefined -> keyboard_interact(IoCb, Name, Instr, PromptInfos, Opts);
- PW -> [PW]
- end;
- undefined ->
- keyboard_interact(IoCb, Name, Instr, PromptInfos, Opts);
- KbdInteractFun ->
- Prompts = lists:map(fun({Prompt, _Echo}) -> Prompt end,
- PromptInfos),
- case KbdInteractFun(Name, Instr, Prompts) of
- Rs when length(Rs) == NumPrompts ->
- Rs;
- Rs ->
- erlang:error({mismatching_number_of_responses,
- {got,Rs},
- {expected,NumPrompts}})
- end
- end.
+ keyboard_interact_get_responses(proplists:get_value(user_interaction, Opts, true),
+ proplists:get_value(keyboard_interact_fun, Opts),
+ proplists:get_value(password, Opts, undefined), IoCb, Name,
+ Instr, PromptInfos, Opts, NumPrompts).
+
+keyboard_interact_get_responses(_, undefined, Password, _, _, _, _, _,
+ 1) when Password =/= undefined ->
+ [Password]; %% Password auth implemented with keyboard-interaction and passwd is known
+keyboard_interact_get_responses(_, _, _, _, _, _, _, _, 0) ->
+ [""];
+keyboard_interact_get_responses(false, undefined, undefined, _, _, _, [Prompt|_], Opts, _) ->
+ ssh_no_io:read_line(Prompt, Opts); %% Throws error as keyboard interaction is not allowed
+keyboard_interact_get_responses(true, undefined, _,IoCb, Name, Instr, PromptInfos, Opts, _) ->
+ keyboard_interact(IoCb, Name, Instr, PromptInfos, Opts);
+keyboard_interact_get_responses(true, Fun, _, Name, Instr, PromptInfos, _, _, NumPrompts) ->
+ keyboard_interact_fun(Fun, Name, Instr, PromptInfos, NumPrompts).
keyboard_interact(IoCb, Name, Instr, Prompts, Opts) ->
if Name /= "" -> IoCb:format("~s", [Name]);
@@ -404,6 +383,21 @@ keyboard_interact(IoCb, Name, Instr, Prompts, Opts) ->
end,
Prompts).
+keyboard_interact_fun(KbdInteractFun, Name, Instr, PromptInfos, NumPrompts) ->
+ Prompts = lists:map(fun({Prompt, _Echo}) -> Prompt end,
+ PromptInfos),
+ case KbdInteractFun(Name, Instr, Prompts) of
+ Rs when length(Rs) == NumPrompts ->
+ Rs;
+ Rs ->
+ throw({mismatching_number_of_responses,
+ {got,Rs},
+ {expected, NumPrompts},
+ #ssh_msg_disconnect{code = ?SSH_DISCONNECT_SERVICE_NOT_AVAILABLE,
+ description = "User interaction failed",
+ language = "en"}})
+ end.
+
other_alg('ssh-rsa') ->
'ssh-dss';
other_alg('ssh-dss') ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 05:02:07 +0000