On Mon, Apr 04, 2016 at 12:04:45AM -0400, Mike Tigas wrote:
[again, cross-posted to tor-dev and guardian-dev.]
A quick status report on this: it works! Hit a big epiphany, figured out how to get `gomobile` to emit the necessary bits, then went wild.
Some example stdout from Onion Browser connecting to Tor via obfs4, meek_lite (google), and scramblesuit: https://gist.github.com/mtigas/f1b9a3a8befa6f60d517eb2340f3cdd4
There are trivial forks of obfs4[1] and goptlib[2] that simply hard-code some options that are normally sent as environment variables because obfs4proxy runs in managed mode[3]. (It's the best I have right now until I can figure out a better way to communicate between obfs4proxy and the iOS bits.) I’ve tacked a few other quick thoughts at the bottom of the iObfs readme[4]. As a quick test I've started building it into Onion Browser (iobfs branch[5]), which is what got the output linked above.
[1]: https://github.com/mtigas/obfs4/compare/1df5c8ffe8f4aa2614323698e8008f1ab1fb... [2]: https://github.com/mtigas/goptlib/compare/f17a5f239f705d7e39a8bccbebdf9927cc...
This is radical. Maybe you don't need the fork of goptlib if you do os.Setenv on the relevant variables before calling pt.ClientSetup in obfs4?