UseRoaming is not available in Mac OSX Sierra

[Kjir]

When generating a key/configuration using github-keygen on OS X Sierra the SSH connections to github will give the following warning:

$ git pull
/Users/stephanebisinger/.ssh/config: line 41: Bad configuration option: useroaming
/Users/stephanebisinger/.ssh/config: terminating, 1 bad configuration options

[dolmen]

Short time workaround: just comment the option in ~/.ssh/config

github-keygen has builtin detection of the options supported by the local OpenSSH installation: it parses the local ssh_config man page. But UseRoaming is a difficult option to handle automatically as it was undocumented option (so not present in the manpage) but a potential security issue if enabled (if you fear that GitHub may attack you) which is the default in OpenSSH 5.4 to 7.1.
UseRoaming is still recognized (but deprecated, so ignored) in the version I have (7.2p2).

Could you give me the exact version of OpenSSH bundled on Sierra?

[dolmen]

I've published release 1.301 that removes UseRoaming if OpenSSH 7.3+.

[elyscape]

@dolmen macOS Sierra has OpenSSH 7.2p2. That being said, Ubuntu 16.04 LTS has OpenSSH 7.2p2 and does support the UseRoaming option.

One way to check for this might be to shell out to ssh and check the stderr, like so:

removed:~ elyscape$ # macOS Sierra
removed:~ elyscape$ ssh -V
OpenSSH_7.2p2, LibreSSL 2.4.1
removed:~ elyscape$ ssh -o UseRoaming=no
command-line: line 0: Bad configuration option: useroaming

elyscape@removed:~$ # Ubuntu 16.04 LTS
elyscape@removed:~$ ssh -V
OpenSSH_7.2p2 Ubuntu-4ubuntu2.1, OpenSSL 1.0.2g  1 Mar 2016
elyscape@removed:~$ ssh -o UseRoaming=no
usage: ssh [-1246AaCfGgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]
           [-D [bind_address:]port] [-E log_file] [-e escape_char]
           [-F configfile] [-I pkcs11] [-i identity_file] [-L address]
           [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]
           [-Q query_option] [-R address] [-S ctl_path] [-W host:port]
           [-w local_tun[:remote_tun]] [user@]hostname [command]

[keith-rollin]

Thanks, @elyscape. I just ran into this problem, too. I hopped up here to report it and found that you were all over it. So that was great!

[dolmen]

I think I will just add a special case for OpenSSH 7.2 on Sierra.
Could you give me the output of this command on Sierra?

$ perl -E 'say $^O'

[keith-rollin]

$ perl -E 'say $^O'
darwin

[keith-rollin]

And for grins:

$ uname -s
Darwin

[keith-rollin]

And if that's not incompatible enough for you:

$ sw_vers -productName
Mac OS X

[dolmen]

Release v1.302 is available.