In a nutshell, since a circuit can not exit at its entry point, it's very
easy for an attacker to find the hidden service guard if only one EntryNodes
is specified since for that guard, the HS will refuse to build a rendezvous
circuit to it.
For now, the best solution is to stop tor to allow a single EntryNodes for
an hidden service.
Fixes#14917
Signed-off-by: David Goulet <dgoulet@ev0ke.net>
In validate_recommended_package_line, at this point in the function,
n_entries is always >= 1. Coverity doesn't like us checking it for
0.
CID 1268063.
We used to use this when we had some controllers that would accept
long names and some that wouldn't. But it's been obsolete for a
while, and it's time to strip it out of the code.
Previously we'd put these strings right on the controllers'
outbufs. But this could cause some trouble, for these reasons:
1) Calling the network stack directly here would make a huge portion
of our networking code (from which so much of the rest of Tor is
reachable) reachable from everything that potentially generated
controller events.
2) Since _some_ events (EVENT_ERR for instance) would cause us to
call connection_flush(), every control_event_* function would
appear to be able to reach even _more_ of the network stack in
our cllgraph.
3) Every time we generated an event, we'd have to walk the whole
connection list, which isn't exactly fast.
This is an attempt to break down the "blob" described in
http://archives.seul.org/tor/dev/Mar-2015/msg00197.html -- the set of
functions from which nearly all the other functions in Tor are
reachable.
Closes ticket 16695.
Make it easier to unit test TestingDirAuthVote{Exit,Guard,HSDir}
by refactoring the code which sets flags based on them into a
new function dirserv_set_routerstatus_testing.
"option to prevent guard,exit,hsdir flag assignment"
"A node will never receive the corresponding flag unless
that node is specified in the
TestingDirAuthVote{Exit,Guard,HSDir} list, regardless of
its uptime, bandwidth, exit policy, or DirPort".
Patch modified by "teor": VoteOnHidServDirectoriesV2
is now obsolete, so TestingDirAuthVoteHSDir always
votes on HSDirs.
Closes ticket 14882. Patch by "robgjansen".
Commit message and changes file by "teor"
with quotes from "robgjansen".
Fix an error in the manual page and comments for
TestingDirAuthVoteHSDir, which suggested that a
HSDir required "ORPort connectivity". While this is true,
it is in no way unique to the HSDir flag. Of all the flags,
only HSDirs need a DirPort configured in order for the
authorities to assign that particular flag.
Fixed as part of 14882. Patch by "teor".
Bugfix on 0.2.6.3 (f9d57473e1 on 10 January 2015).
