aboutsummaryrefslogtreecommitdiffstats
path: root/lib/ssh
diff options
context:
space:
mode:
Diffstat (limited to 'lib/ssh')
-rw-r--r--lib/ssh/doc/src/ssh.xml4
-rw-r--r--lib/ssh/src/ssh.erl105
-rw-r--r--lib/ssh/test/ssh_protocol_SUITE.erl11
-rw-r--r--lib/ssh/test/ssh_protocol_SUITE_data/dh_group_test.moduli3
4 files changed, 100 insertions, 23 deletions
diff --git a/lib/ssh/doc/src/ssh.xml b/lib/ssh/doc/src/ssh.xml
index 66f872490c..1e4dd91eb6 100644
--- a/lib/ssh/doc/src/ssh.xml
+++ b/lib/ssh/doc/src/ssh.xml
@@ -462,7 +462,7 @@ kex is implicit but public_key is set explicitly.</p>
</warning>
</item>
- <tag><c><![CDATA[{dh_gex_groups, [{Size=integer(),G=integer(),P=integer()}] | {file,filename()} }]]></c></tag>
+ <tag><c><![CDATA[{dh_gex_groups, [{Size=integer(),G=integer(),P=integer()}] | {file,filename()} {ssh_moduli_file,filename()} }]]></c></tag>
<item>
<p>Sets the groups that the server may choose among when diffie-hellman-group-exchange is negotiated.
See RFC 4419 for details.
@@ -471,6 +471,8 @@ kex is implicit but public_key is set explicitly.</p>
</p>
<p>If the parameter is <c>{file,filename()}</c>, the file must exist and have one or more three-tuples terminated by a dot. The interpretation is as if the tuples had been given directly in the option. The file is read when the daemon starts.
</p>
+ <p>If the parameter is <c>{ssh_moduli_file,filename()}</c>, the file must exist and be in ssh-keygen moduli file format. The file is read when the daemon starts.
+ </p>
</item>
<tag><c><![CDATA[{pwdfun, fun(User::string(), password::string()) -> boolean()}]]></c></tag>
diff --git a/lib/ssh/src/ssh.erl b/lib/ssh/src/ssh.erl
index 8d36c847de..9befceb51b 100644
--- a/lib/ssh/src/ssh.erl
+++ b/lib/ssh/src/ssh.erl
@@ -421,28 +421,59 @@ handle_ssh_option({user_interaction, Value} = Opt) when is_boolean(Value) ->
Opt;
handle_ssh_option({preferred_algorithms,[_|_]} = Opt) ->
handle_pref_algs(Opt);
-handle_ssh_option({dh_gex_groups,L=[{I1,I2,I3}|_]}) when is_integer(I1), I1>0,
- is_integer(I2), I2>0,
- is_integer(I3), I3>0 ->
- {dh_gex_groups, public_key:moduli_collect_per_size(
- lists:map(fun({N,G,P}) when is_integer(N),N>0,
- is_integer(G),G>0,
- is_integer(P),P>0 -> {N,{G,P}} end, L)
- )};
-handle_ssh_option({dh_gex_groups,{file,File=[C|_]}}=Opt) when is_integer(C), C>0 ->
- %% A string, (file name)
- case file:consult(File) of
- {ok, List} ->
- try handle_ssh_option({dh_gex_groups,List}) of
- {dh_gex_groups,_} = NewOpt ->
- NewOpt
- catch
- _:_ ->
- throw({error, {{eoptions, Opt}, "Bad format in file"}})
- end;
- Error ->
- throw({error, {{eoptions, Opt},{"Error reading file",Error}}})
- end;
+
+handle_ssh_option({dh_gex_groups,L0}) when is_list(L0) ->
+ {dh_gex_groups,
+ collect_per_size(
+ lists:foldl(
+ fun({N,G,P}, Acc) when is_integer(N),N>0,
+ is_integer(G),G>0,
+ is_integer(P),P>0 ->
+ [{N,{G,P}} | Acc];
+ ({N,{G,P}}, Acc) when is_integer(N),N>0,
+ is_integer(G),G>0,
+ is_integer(P),P>0 ->
+ [{N,{G,P}} | Acc];
+ ({N,GPs}, Acc) when is_list(GPs) ->
+ lists:foldr(fun({Gi,Pi}, Acci) when is_integer(Gi),Gi>0,
+ is_integer(Pi),Pi>0 ->
+ [{N,{Gi,Pi}} | Acci]
+ end, Acc, GPs)
+ end, [], L0))};
+
+handle_ssh_option({dh_gex_groups,{Tag,File=[C|_]}}=Opt) when is_integer(C), C>0,
+ Tag == file ;
+ Tag == ssh_moduli_file ->
+ {ok,GroupDefs} =
+ case Tag of
+ file ->
+ file:consult(File);
+ ssh_moduli_file ->
+ case file:open(File,[read]) of
+ {ok,D} ->
+ try
+ {ok,Moduli} = read_moduli_file(D, 1, []),
+ file:close(D),
+ {ok, Moduli}
+ catch
+ _:_ ->
+ throw({error, {{eoptions, Opt}, "Bad format in file "++File}})
+ end;
+ {error,enoent} ->
+ throw({error, {{eoptions, Opt}, "File not found:"++File}});
+ {error,Error} ->
+ throw({error, {{eoptions, Opt}, io_lib:format("Error reading file ~s: ~p",[File,Error])}})
+ end
+ end,
+
+ try
+ handle_ssh_option({dh_gex_groups,GroupDefs})
+ catch
+ _:_ ->
+ throw({error, {{eoptions, Opt}, "Bad format in file: "++File}})
+ end;
+
+
handle_ssh_option({dh_gex_limits,{Min,I,Max}} = Opt) when is_integer(Min), Min>0,
is_integer(I), I>=Min,
is_integer(Max), Max>=I ->
@@ -665,3 +696,33 @@ directory_exist_readable(Dir) ->
+collect_per_size(L) ->
+ lists:foldr(
+ fun({Sz,GP}, [{Sz,GPs}|Acc]) -> [{Sz,[GP|GPs]}|Acc];
+ ({Sz,GP}, Acc) -> [{Sz,[GP]}|Acc]
+ end, [], lists:sort(L)).
+
+read_moduli_file(D, I, Acc) ->
+ case io:get_line(D,"") of
+ {error,Error} ->
+ {error,Error};
+ eof ->
+ {ok, Acc};
+ "#" ++ _ -> read_moduli_file(D, I+1, Acc);
+ <<"#",_/binary>> -> read_moduli_file(D, I+1, Acc);
+ Data ->
+ Line = if is_binary(Data) -> binary_to_list(Data);
+ is_list(Data) -> Data
+ end,
+ try
+ [_Time,_Type,_Tests,_Tries,Size,G,P] = string:tokens(Line," \r\n"),
+ M = {list_to_integer(Size),
+ {list_to_integer(G), list_to_integer(P,16)}
+ },
+ read_moduli_file(D, I+1, [M|Acc])
+ catch
+ _:_ ->
+ read_moduli_file(D, I+1, Acc)
+ end
+ end.
+
diff --git a/lib/ssh/test/ssh_protocol_SUITE.erl b/lib/ssh/test/ssh_protocol_SUITE.erl
index 9d54f14ff6..0292c8d149 100644
--- a/lib/ssh/test/ssh_protocol_SUITE.erl
+++ b/lib/ssh/test/ssh_protocol_SUITE.erl
@@ -67,6 +67,7 @@ groups() ->
{kex, [], [no_common_alg_server_disconnects,
no_common_alg_client_disconnects,
gex_client_init_option_groups,
+ gex_client_init_option_groups_moduli_file,
gex_client_init_option_groups_file
]},
{service_requests, [], [bad_service_name,
@@ -90,6 +91,7 @@ init_per_testcase(no_common_alg_server_disconnects, Config) ->
start_std_daemon(Config, [{preferred_algorithms,[{public_key,['ssh-rsa']}]}]);
init_per_testcase(TC, Config) when TC == gex_client_init_option_groups ;
+ TC == gex_client_init_option_groups_moduli_file ;
TC == gex_client_init_option_groups_file ->
Opts = case TC of
gex_client_init_option_groups ->
@@ -98,6 +100,10 @@ init_per_testcase(TC, Config) when TC == gex_client_init_option_groups ;
DataDir = ?config(data_dir, Config),
F = filename:join(DataDir, "dh_group_test"),
[{dh_gex_groups, {file,F}}];
+ gex_client_init_option_groups_moduli_file ->
+ DataDir = ?config(data_dir, Config),
+ F = filename:join(DataDir, "dh_group_test.moduli"),
+ [{dh_gex_groups, {ssh_moduli_file,F}}];
_ ->
[]
end,
@@ -110,6 +116,7 @@ init_per_testcase(_TestCase, Config) ->
end_per_testcase(no_common_alg_server_disconnects, Config) ->
stop_std_daemon(Config);
end_per_testcase(TC, Config) when TC == gex_client_init_option_groups ;
+ TC == gex_client_init_option_groups_moduli_file ;
TC == gex_client_init_option_groups_file ->
stop_std_daemon(Config);
end_per_testcase(_TestCase, Config) ->
@@ -335,6 +342,10 @@ gex_client_init_option_groups_file(Config) ->
do_gex_client_init(Config, {2000, 2048, 4000},
{5,61}).
+gex_client_init_option_groups_moduli_file(Config) ->
+ do_gex_client_init(Config, {2000, 2048, 4000},
+ {5,16#B7}).
+
do_gex_client_init(Config, {Min,N,Max}, {G,P}) ->
{ok,_} =
ssh_trpt_test_lib:exec(
diff --git a/lib/ssh/test/ssh_protocol_SUITE_data/dh_group_test.moduli b/lib/ssh/test/ssh_protocol_SUITE_data/dh_group_test.moduli
new file mode 100644
index 0000000000..f6995ba4c9
--- /dev/null
+++ b/lib/ssh/test/ssh_protocol_SUITE_data/dh_group_test.moduli
@@ -0,0 +1,3 @@
+20151021104105 2 6 100 2222 5 B7
+20151021104106 2 6 100 1111 5 4F
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 14:06:30 +0000