ssh: fix decode uid, gid

- adds missing list_to_integer conversion upon decoding
- fix version typo
- enhanced tests

lib/ssh/src/ssh_xfer.erl

@@ -660,7 +660,7 @@ encode_As(Vsn, [{AName, X}|As], Flags, Acc) ->
 	     encode_As(Vsn, As,Flags bor ?SSH_FILEXFER_ATTR_UIDGID,
 		       [?uint32(X) | Acc]);
 	ownergroup when Vsn>=5 ->
-	    X1 = list_to_binary(integer_to_list(X)), % TODO: check owner and group
+	    X1 = integer_to_binary(X), % TODO: check owner and group
 	    encode_As(Vsn, As,Flags bor ?SSH_FILEXFER_ATTR_OWNERGROUP,
 		      [?binary(X1) | Acc]);
 	permissions ->
@@ -736,13 +736,11 @@ decode_As(Vsn, [{AName, AField}|As], R, Flags, Tail) ->
 	    decode_As(Vsn, As, setelement(AField, R, X), Flags, Tail2);
 	ownergroup when ?is_set(?SSH_FILEXFER_ATTR_OWNERGROUP, Flags),Vsn>=5 ->
 	    <<?UINT32(Len), Bin:Len/binary, Tail2/binary>> = Tail,
-	    X = binary_to_list(Bin),
+	    X = binary_to_integer(Bin),
 	    decode_As(Vsn, As, setelement(AField, R, X), Flags, Tail2);
-
 	permissions when ?is_set(?SSH_FILEXFER_ATTR_PERMISSIONS,Flags),Vsn>=5->
 	    <<?UINT32(X), Tail2/binary>> = Tail,
 	    decode_As(Vsn, As, setelement(AField, R, X), Flags, Tail2);
-
 	permissions when ?is_set(?SSH_FILEXFER_ATTR_PERMISSIONS,Flags),Vsn=<3->
 	    <<?UINT32(X), Tail2/binary>> = Tail,
 	    R1 = setelement(AField, R, X),
@@ -757,7 +755,6 @@ decode_As(Vsn, [{AName, AField}|As], R, Flags, Tail) ->
 		       _ -> unknown
 		   end,
 	    decode_As(Vsn, As, R1#ssh_xfer_attr { type=Type}, Flags, Tail2);
-
 	acmodtime when ?is_set(?SSH_FILEXFER_ATTR_ACMODTIME,Flags),Vsn=<3 ->
 	    <<?UINT32(X), Tail2/binary>> = Tail,
 	    decode_As(Vsn, As, setelement(AField, R, X), Flags, Tail2);

lib/ssh/test/ssh_sftp_SUITE.erl

@@ -81,7 +81,8 @@
 -include_lib("common_test/include/ct.hrl").
 -include_lib("kernel/include/file.hrl").
 -include("ssh_test_lib.hrl").
-						% Default timetrap timeout
+-include_lib("stdlib/include/assert.hrl").
+%% Default timetrap timeout
 -define(default_timeout, test_server:minutes(1)).
 
 %%--------------------------------------------------------------------
@@ -563,26 +564,62 @@ links(Config) when is_list(Config) ->
 retrieve_attributes(Config) when is_list(Config) ->
     FileName = proplists:get_value(filename, Config),
     SftpFileName = w2l(Config, FileName),
-
     {Sftp, _} = proplists:get_value(sftp, Config),
     {ok, FileInfo} = ssh_sftp:read_file_info(Sftp, SftpFileName),
     {ok, NewFileInfo} = file:read_file_info(FileName),
-
-    %% TODO comparison. There are some differences now is that ok?
-    ct:log("SFTP: ~p   FILE: ~p~n", [FileInfo, NewFileInfo]).
+    ct:log("ssh_sftp:read_file_info(~p): ~p~n"
+           "file:read_file_info(~p): ~p",
+           [SftpFileName, FileInfo, FileName, NewFileInfo]),
+    {ExpectedUid, ExpectedGid} =
+        case {os:type(), proplists:get_value(group,Config)} of
+            {{win32, _}, openssh_server} ->
+                %% Windows compiled Erlang is expected will return 0;
+                %% but when Erlang(Windows) client interacts with
+                %% OpenSSH server - value 1000 is received by client
+                %% over SFTP (because OpenSSH is compiled for Linux
+                %% and runs on WSL)
+                {1000, 1000};
+            _ ->
+                {FileInfo#file_info.uid, FileInfo#file_info.gid}
+        end,
+    ?assertEqual(ExpectedUid, NewFileInfo#file_info.uid),
+    ?assertEqual(ExpectedGid, NewFileInfo#file_info.gid),
+    ok.
 
 %%--------------------------------------------------------------------
 set_attributes(Config) when is_list(Config) ->
     FileName = proplists:get_value(testfile, Config),
     SftpFileName = w2l(Config, FileName),
-
     {Sftp, _} = proplists:get_value(sftp, Config),
     {ok,Fd} = file:open(FileName, write),
     io:put_chars(Fd,"foo"),
-    ok = ssh_sftp:write_file_info(Sftp, SftpFileName, #file_info{mode=8#400}),
-    {error, eacces} = file:write_file(FileName, "hello again"),
-    ok = ssh_sftp:write_file_info(Sftp, SftpFileName, #file_info{mode=8#600}),
-    ok = file:write_file(FileName, "hello again").
+    TestWriting =
+        fun(FInfo) ->
+                ok = ssh_sftp:write_file_info(Sftp, SftpFileName,
+                                              FInfo#file_info{mode=8#400}),
+                {error, eacces} = file:write_file(FileName, "hello again"),
+                ok = ssh_sftp:write_file_info(Sftp, SftpFileName,
+                                              FInfo#file_info{mode=8#600}),
+                ok = file:write_file(FileName, "hello again")
+        end,
+    TestWriting(#file_info{}),
+    IsErlangServer =
+        fun() ->
+                TcGroupPath = proplists:get_value(tc_group_path, Config),
+                {_, Path} = lists:unzip(lists:flatten(TcGroupPath)),
+                lists:member(erlang_server, Path)
+        end,
+    case IsErlangServer() of
+        true ->
+            ct:log("Testing with writing a complete #file_info record"),
+            {ok, FileInfo} = file:read_file_info(SftpFileName),
+            TestWriting(FileInfo);
+        _ ->
+            %% with OpenSSH daemon started by other user above instruction end
+            %% up with permission denied
+            ok
+    end,
+    ok.
 
 %%--------------------------------------------------------------------
 file_owner_access(Config) when is_list(Config) ->