Add new default bridge to OONI tests

[cohosh]

We have a new default bridge in Tor Browser:

obfs4 185.100.85.3:443 5B403DFE34F4872EB027059CECAE30B0C864B3A2 cert=bWUdFUe8io9U6JkSLoGAvSAUDcB779/shovCYmYAQb/pW/iEAMZtO/lCd94OokOF909TPA iat-mode=2

Can we add this to the OONI Tor tests?

[hellais]

@FedericoCeratto do you know which of these two tor-targets.json files need to be editted and where the deployment needs to happen: https://github.com/ooni/sysadmin/search?q=obfs4?

[bassosimone]

The work done by @hellais in ooni/sysadmin#495 should in principle add this bridge, however I just manually checked the output of https://bridges.torproject.org/moat/circumvention/builtin and I did not see such a bridge. So, I think this is a good moment to summon @meskio and double check our procedure here. To summarize/recap:

1. The PR at Tor targets sysadmin#495 fetches bridges from https://bridges.torproject.org/moat/circumvention/builtin and writes to disk the files that, in turn, are served by the OONI API to OONI probes;

2. Our understanding is that the https://bridges.torproject.org/moat/circumvention/builtin API serves bridges included in Tor Browser;

3. So, I would have expected to see the bridge that @cohosh mentioned above inside https://bridges.torproject.org/moat/circumvention/builtin's output, but that's not the case;

4. Now I am wondering whether (a) the above bridge is not part of Tor Browser anymore or (b) some of our assumptions are wrong.

[meskio]

It looks like this bridge was removed in february:
https://gitweb.torproject.org/builders/tor-browser-build.git/commit/projects/tor-browser/Bundle-Data/PTConfigs/bridge_prefs.js?id=7789cee3b61c84af176dddb460a9e39f603c062f

The full list of obfs4 bridges in torbrowser is in this file (used to be bridge_prefs.js but got moved):
https://gitweb.torproject.org/builders/tor-browser-build.git/tree/projects/common/bridges_list.obfs4.txt

https://bridges.torproject.org/moat/circumvention/builtin does get the list from this file and provides it as a json.

[bassosimone]

Awesome, thanks! So, we can close this issue!