Commit Graph

75 Commits

Author SHA1 Message Date
Amber Brown
49af402019 run isort 2018-07-09 16:09:20 +10:00
Richard van der Hoff
e82db24a0e Try to log more helpful info when a sig verification fails
Firstly, don't swallow the reason for the failure

Secondly, don't assume all exceptions are verification failures

Thirdly, log a bit of info about the key being used if debug is enabled
2018-06-08 12:13:08 +01:00
Richard van der Hoff
fc149b4eeb Merge remote-tracking branch 'origin/develop' into rav/use_run_in_background 2018-04-27 14:31:23 +01:00
Richard van der Hoff
2a13af23bc Use run_in_background in preference to preserve_fn
While I was going through uses of preserve_fn for other PRs, I converted places
which only use the wrapped function once to use run_in_background, to avoid
creating the function object.
2018-04-27 12:55:51 +01:00
Richard van der Hoff
9255a6cb17 Improve exception handling for background processes
There were a bunch of places where we fire off a process to happen in the
background, but don't have any exception handling on it - instead relying on
the unhandled error being logged when the relevent deferred gets
garbage-collected.

This is unsatisfactory for a number of reasons:
 - logging on garbage collection is best-effort and may happen some time after
   the error, if at all
 - it can be hard to figure out where the error actually happened.
 - it is logged as a scary CRITICAL error which (a) I always forget to grep for
   and (b) it's not really CRITICAL if a background process we don't care about
   fails.

So this is an attempt to add exception handling to everything we fire off into
the background.
2018-04-27 11:07:40 +01:00
Adrian Tschira
1515560f5c Use str(e) instead of e.message
Doing this I learned e.message was pretty shortlived, added in 2.6,
they realized it was a bad idea and deprecated it in 2.7

Signed-off-by: Adrian Tschira <nota@notafile.com>
2018-04-15 20:32:42 +02:00
Richard van der Hoff
eaaabc6c4f replace 'except:' with 'except Exception:'
what could possibly go wrong
2017-10-23 15:52:32 +01:00
Richard van der Hoff
94133d7ce8 Merge branch 'develop' into develop 2017-09-25 11:50:11 +01:00
Richard van der Hoff
c5c24c239b Fix logcontext handling in verify_json_objects_for_server
preserve_context_over_fn is essentially broken, because (a) it pointlessly
drops the current logcontext before calling its wrapped function, which means
we don't get any useful logcontexts for _handle_key_deferred; (b) it wraps the
resulting deferred in a _PreservingContextDeferred, which is very dangerous
because you then can't yield on it without leaking context back into the
reactor.

Instead, let's specify that the resultant deferreds call their callbacks with
no logcontext.
2017-09-20 01:32:42 +01:00
Richard van der Hoff
c5b0e9f485 Turn _start_key_lookups into an inlineCallbacks function
... which means that logcontexts can be correctly preserved for the stuff it
does.

get_server_verify_keys is now called with the logcontext, so needs to
preserve_fn when it fires off its nested inlineCallbacks function.

Also renames get_server_verify_keys to reflect the fact it's meant to be
private.
2017-09-20 01:32:42 +01:00
Richard van der Hoff
abdefb8a01 Fix potential race in _start_key_lookups
If the verify_request.deferred has already completed, then `remove_deferreds`
will be called immediately. It therefore might resolve the server_to_deferred
deferred while there are still other requests for that server in flight.

To avoid that, we should build the complete list of requests, and *then* add the
callbacks.
2017-09-20 01:32:42 +01:00
Richard van der Hoff
afbd773dc6 Add some comments to _start_key_lookups 2017-09-20 01:32:42 +01:00
Richard van der Hoff
2a4b9ea233 Consistency for how verify_request.deferred is called
Define that it is run with no log context, and make sure that happens.

If we aren't careful to reset the logcontext, we can't bung the deferreds into
defer.gatherResults etc. We don't actually do that directly, but we *do*
resolve other deferreds from affected callbacks (notably the server_to_deferred
map in _start_key_lookups), and those *do* get passed into
defer.gatherResults. It turns out that this way ends up being least confusing.
2017-09-20 01:32:42 +01:00
Richard van der Hoff
3b98439eca Factor out _start_key_lookups
... to make it easier to see what's going on.
2017-09-20 01:32:42 +01:00
Richard van der Hoff
fde63b880d Replace server_and_json with verify_requests
This is a precursor to factoring some of this code out.
2017-09-20 01:32:42 +01:00
Richard van der Hoff
2d511defd9 pull out handle_key_deferred to top level
There's no need for this to be a nested definition; pulling it out not only
makes it more efficient, but makes it easier to check that it's not accessing
any local variables it shouldn't be.
2017-09-20 01:32:42 +01:00
Richard van der Hoff
dd1ea9763a Fix incorrect key_ids in error message 2017-09-20 01:32:42 +01:00
Richard van der Hoff
9864efa532 Fix concurrent server_key requests ()
Fix a bug where we could end up firing off multiple requests for server_keys
for the same server at the same time.
2017-09-19 23:25:44 +01:00
Richard van der Hoff
290777b3d9 Clean up and document handling of logcontexts in Keyring ()
I'm still unclear on what the intended behaviour for
`verify_json_objects_for_server` is, but at least I now understand the
behaviour of most of the things it calls...
2017-09-18 18:31:01 +01:00
Kenny Keslar
f18373dc5d Fix iteration of requests_missing_keys; list doesn't have .values()
Signed-off-by: Kenny Keslar <r3dey3@r3dey3.com>
2017-07-26 22:44:19 -05:00
Richard van der Hoff
9397edb28b Merge pull request from matrix-org/rav/federation_backoff
push federation retry limiter down to matrixfederationclient
2017-03-23 22:27:01 +00:00
Richard van der Hoff
4bd597d9fc push federation retry limiter down to matrixfederationclient
rather than having to instrument everywhere we make a federation call,
make the MatrixFederationHttpClient manage the retry limiter.
2017-03-23 09:28:46 +00:00
Richard van der Hoff
64778693be fix up some key verif docstrings 2017-03-21 13:27:50 +00:00
Richard van der Hoff
c36d15d2de Add some debug to help diagnose weird federation issue 2017-03-20 15:36:14 +00:00
Erik Johnston
9219139351 Preserve some logcontexts 2016-08-24 11:58:40 +01:00
Erik Johnston
04fc8bbcb0 Update keyring Measure 2016-08-19 18:23:44 +01:00
Erik Johnston
2426c2f21a Measure keyrings 2016-08-19 18:23:44 +01:00
Erik Johnston
fa1ce4d8ad Don't print stack traces when failing to get remote keys 2016-08-10 10:44:37 +01:00
Mark Haines
29b25d59c6 Merge branch 'develop' into markjh/verify
Conflicts:
	synapse/crypto/keyring.py
2016-07-27 15:11:02 +01:00
Mark Haines
884b800899 Merge pull request from matrix-org/markjh/only_from2
Add a couple more checks to the keyring
2016-07-27 15:08:22 +01:00
Mark Haines
fe1b369946 Clean up verify_json_objects_for_server 2016-07-27 14:10:43 +01:00
Mark Haines
a4b06b619c Add a couple more checks to the keyring 2016-07-26 19:50:11 +01:00
Mark Haines
87ffd21b29 Fix a couple of bugs in the transaction and keyring code 2016-07-26 19:19:08 +01:00
Erik Johnston
2c1fbea531 Fix up logcontexts 2016-02-08 14:26:45 +00:00
Matthew Hodgson
6c28ac260c copyrights 2016-01-07 04:26:29 +00:00
Paul "LeoNerd" Evans
a6ba41e078 Actually look up required remote server key IDs
set.union() is a side-effect-free function that returns the union of two
sets. This clearly wanted .update(), which is the side-effecting mutator
version.
2015-12-18 21:36:42 +00:00
Erik Johnston
0eabfa55f6 Fix typo 2015-11-20 17:17:58 +00:00
Erik Johnston
6408541075 Don't limit connections to perspective servers 2015-11-20 17:15:44 +00:00
Erik Johnston
ffe8cf7e59 Fix bug where we sometimes didn't fetch all the keys requested for a
server.
2015-09-17 10:21:32 +01:00
Daniel Wagner-Hall
2c8f16257a Merge pull request from matrix-org/daniel/insecureclient
Allow configuration to ignore invalid SSL certs
2015-09-15 16:52:38 +01:00
Erik Johnston
dd0867f5ba Various bug fixes to crypto.keyring 2015-09-09 17:02:39 +01:00
Daniel Wagner-Hall
81a93ddcc8 Allow configuration to ignore invalid SSL certs
This will be useful for sytest, and sytest only, hence the aggressive
config key name.
2015-09-09 12:02:07 +01:00
Mark Haines
78323ccdb3 Remove syutil dependency in favour of smaller single-purpose libraries 2015-08-24 16:17:38 +01:00
Erik Johnston
f0dd568e16 Wait for previous attempts at fetching keys for a given server before trying to fetch more 2015-06-26 11:25:00 +01:00
Erik Johnston
b5f55a1d85 Implement bulk verify_signed_json API 2015-06-26 10:39:34 +01:00
Erik Johnston
291cba284b Handle the case when things return empty but non none things 2015-05-19 14:42:46 +01:00
Erik Johnston
253f76a0a5 Don't always hit get_server_verify_key_v1_direct 2015-05-19 14:42:38 +01:00
Erik Johnston
d3e09f12d0 SYN-383: Actually, we expect this value to be a dict 2015-05-19 13:12:41 +01:00
Erik Johnston
2b7120e233 SYN-383: Handle the fact the server might not have signed things 2015-05-19 12:49:38 +01:00
Erik Johnston
8b256a7296 Don't reuse var names 2015-05-19 11:58:22 +01:00