Commit Graph

25795 Commits

Author SHA1 Message Date
George Kadianakis
559658ff1c ed25519: Add func that checks for torsion component in pubkeys.
See https://lists.torproject.org/pipermail/tor-dev/2017-April/012213.html .
2017-06-27 17:17:58 -04:00
Nick Mathewson
f367453cb5 Mark descriptors as undownloadable when dirserv_add_() rejects them
As of ac2f6b608a in 0.2.1.19-alpha,
Sebastian fixed bug 888 by marking descriptors as "impossible" by
digest if they got rejected during the
router_load_routers_from_string() phase. This fix stopped clients
and relays from downloading the same thing over and over.

But we never made the same change for descriptors rejected during
dirserv_add_{descriptor,extrainfo}.  Instead, we tried to notice in
advance that we'd reject them with dirserv_would_reject().

This notice-in-advance check stopped working once we added
key-pinning and didn't make a corresponding key-pinning change to
dirserv_would_reject() [since a routerstatus_t doesn't include an
ed25519 key].

So as a fix, let's make the dirserv_add_*() functions mark digests
as undownloadable when they are rejected.

Fixes bug 22349; I am calling this a fix on 0.2.1.19-alpha, though
you could also argue for it being a fix on 0.2.7.2-alpha.
2017-06-27 12:01:46 -04:00
Nick Mathewson
3483f7c003 Merge branch 'maint-0.2.7-redux' into maint-0.2.8 2017-06-27 11:04:44 -04:00
Nick Mathewson
9a0fd2dbb1 Merge branch 'maint-0.2.6' into maint-0.2.7-redux 2017-06-27 11:04:44 -04:00
Nick Mathewson
3de27618e6 Merge branch 'maint-0.2.5' into maint-0.2.6 2017-06-27 11:04:44 -04:00
Nick Mathewson
ccae991662 Merge branch 'maint-0.2.4' into maint-0.2.5 2017-06-27 11:04:44 -04:00
Nick Mathewson
a242d194c7 Merge branch 'maint-0.2.9' into maint-0.3.0 2017-06-27 11:04:44 -04:00
Nick Mathewson
711160a46f Merge branch 'maint-0.2.8' into maint-0.2.9 2017-06-27 11:04:44 -04:00
Nick Mathewson
32eba3d6aa Merge branch 'maint-0.3.0' into maint-0.3.1 2017-06-27 11:04:44 -04:00
Nick Mathewson
0576f9f433 Merge branch 'maint-0.3.1' 2017-06-27 11:04:44 -04:00
Nick Mathewson
d56f699399 Merge branch 'bug22737_024' into maint-0.2.4 2017-06-27 11:04:41 -04:00
Nick Mathewson
8d2978b13c Fix an errant memset() into the middle of a struct in cell_pack().
This mistake causes two possible bugs. I believe they are both
harmless IRL.

BUG 1: memory stomping

When we call the memset, we are overwriting two 0 bytes past the end
of packed_cell_t.body. But I think that's harmless in practice,
because the definition of packed_cell_t is:

// ...
typedef struct packed_cell_t {
  TOR_SIMPLEQ_ENTRY(packed_cell_t) next;
  char body[CELL_MAX_NETWORK_SIZE];
  uint32_t inserted_time;
} packed_cell_t;

So we will overwrite either two bytes of inserted_time, or two bytes
of padding, depending on how the platform handles alignment.

If we're overwriting padding, that's safe.

If we are overwriting the inserted_time field, that's also safe: In
every case where we call cell_pack() from connection_or.c, we ignore
the inserted_time field. When we call cell_pack() from relay.c, we
don't set or use inserted_time until right after we have called
cell_pack(). SO I believe we're safe in that case too.

BUG 2: memory exposure

The original reason for this memset was to avoid the possibility of
accidentally leaking uninitialized ram to the network. Now
remember, if wide_circ_ids is false on a connection, we shouldn't
actually be sending more than 512 bytes of packed_cell_t.body, so
these two bytes can only leak to the network if there is another bug
somewhere else in the code that sends more data than is correct.

Fortunately, in relay.c, where we allocate packed_cell_t in
packed_cell_new() , we allocate it with tor_malloc_zero(), which
clears the RAM, right before we call cell_pack. So those
packed_cell_t.body bytes can't leak any information.

That leaves the two calls to cell_pack() in connection_or.c, which
use stack-alocated packed_cell_t instances.

In or_handshake_state_record_cell(), we pass the cell's contents to
crypto_digest_add_bytes(). When we do so, we get the number of
bytes to pass using the same setting of wide_circ_ids as we passed
to cell_pack(). So I believe that's safe.

In connection_or_write_cell_to_buf(), we also use the same setting
of wide_circ_ids in both calls. So I believe that's safe too.

I introduced this bug with 1c0e87f6d8
back in 0.2.4.11-alpha; it is bug 22737 and CID 1401591
2017-06-27 10:47:20 -04:00
Nick Mathewson
22f441d4ee Merge branch 'maint-0.3.1' 2017-06-27 10:32:50 -04:00
Nick Mathewson
fd16dd2608 Merge branch 'bug22719_031' into maint-0.3.1 2017-06-27 10:31:33 -04:00
Nick Mathewson
50be4600ae changes file for bug 22719 2017-06-27 10:31:03 -04:00
David Goulet
c17a04376d nodelist: Add functions to check for HS v3 support
This introduces node_supports_v3_hsdir() and node_supports_ed25519_hs_intro()
that checks the routerstatus_t of a node and if not present, checks the
routerinfo_t.

This is groundwork for proposal 224 service implementation in #20657.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-06-27 10:24:15 -04:00
David Goulet
82dee76740 hs: Ignore unparseable v3 introduction point
It is possible that at some point in time a client will encounter unknown or
new fields for an introduction point in a descriptor so let them ignore it for
forward compatibility.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-06-27 10:19:57 -04:00
Nick Mathewson
f6df433b91 Merge branch 'maint-0.3.1' 2017-06-26 14:30:21 -04:00
Nick Mathewson
32596016a2 Merge branch 'bug22105_031' into maint-0.3.1 2017-06-26 14:30:17 -04:00
Nick Mathewson
c29a559e7b Merge branch 'maint-0.3.1' 2017-06-26 14:15:21 -04:00
Nick Mathewson
d72cfb259d Patch for 22720 from huyvq: exit(1) more often
See changes file for full details.
2017-06-26 14:14:56 -04:00
Nick Mathewson
06414b9922 Merge branch 'maint-0.3.1' 2017-06-26 11:39:43 -04:00
Nick Mathewson
8f59661dba Merge branch 'bug22212_squashed' into maint-0.3.1 2017-06-26 11:27:09 -04:00
Mike Perry
0c4751b591 Changes file for Bug 22212. 2017-06-26 11:26:59 -04:00
Mike Perry
0592ee45fc Demote a log message due to libevent delays.
This is a side-effect of being single-threaded. The worst cases of this are
actually Bug #16585.
2017-06-26 11:26:59 -04:00
Nick Mathewson
82a68be69a Merge branch 'maint-0.3.1' 2017-06-26 10:32:57 -04:00
Nick Mathewson
0c7c49483f Fix a coverity warning about a no-op assert with-64 bit size_t
This is CID 1403400
2017-06-26 10:31:13 -04:00
Nick Mathewson
b546d8bc2b Try a little harder to make sure we never call tor_compress_process wrong. 2017-06-26 09:39:59 -04:00
Nick Mathewson
acbe16a9a2 Log even more to try to debug 22719 2017-06-24 13:40:02 -04:00
Nick Mathewson
6caf924605 Add an additional log message to try to diagnose #22719 2017-06-24 11:27:46 -04:00
Nick Mathewson
89d0261eb5 Merge remote-tracking branch 'isis/bug4019' 2017-06-23 14:38:20 -04:00
Isis Lovecruft
424c4586df
Add changes file for bug4019. 2017-06-23 18:31:16 +00:00
Nick Mathewson
80360ed9fa Merge branch 'bug3056_squashed' 2017-06-23 09:28:27 -04:00
Nick Mathewson
96fab4aaa6 Improve clarity, safety, and rate of dns spoofing log msg
Closes ticket 3056.
2017-06-23 09:28:17 -04:00
Nick Mathewson
90046a09dd Merge branch 'maint-0.3.1' 2017-06-22 10:56:08 -04:00
Nick Mathewson
2c49a9852d Merge branch 'maint-0.3.0' into maint-0.3.1 2017-06-22 10:56:08 -04:00
Nick Mathewson
bdd267e74d Combine our "don't do this if no consensus" entryguards checks
Suggested by asn on 22400 review.
2017-06-22 09:28:30 -04:00
Nick Mathewson
ee7101a875 expand changes file for bug 22461 2017-06-22 08:16:56 -04:00
Nick Mathewson
34ecfeb479 whitespace fix 2017-06-22 08:16:48 -04:00
Nick Mathewson
b9d8c8b126 Merge remote-tracking branch 'rl1987/bug22461' 2017-06-22 08:11:36 -04:00
Nick Mathewson
dc9ec519b5 Merge remote-tracking branch 'public/bug7890' 2017-06-22 08:04:12 -04:00
Isis Lovecruft
28344b74ba
config: Fix duplicate error message for nonlocal SocksPorts.
If `validate_only` is true, then just validate the configuration without warning
about it.  This way, we only emit warnings when the listener is actually opened.
(Otherwise, every time we parse the config we will might re-warn and we would
need to keep state; whereas the listeners are only opened once.)

 * FIXES #4019.
2017-06-22 00:28:31 +00:00
Roger Dingledine
005500e14d make assign_onionskin_to_cpuworker failure case more clear
now it looks like the other time we call it
2017-06-21 17:42:10 -04:00
Nick Mathewson
3a8a92fddd Merge branch 'callgraph_reduction_v2' 2017-06-21 16:47:55 -04:00
Nick Mathewson
5dcc6bef1e Add GETINFO targets to determine whether md/desc fetching is enabled
Closes ticket 22684.
2017-06-21 16:45:31 -04:00
Nick Mathewson
1c0a2335cd Extract channel_do_open_actions() from non-open _change_state cases
This reduces the size of the largest SCC in the callgraph by 30
functions, from 58 to 28.
2017-06-21 14:03:00 -04:00
Nick Mathewson
5d3f484f4a Merge branch 'maint-0.3.1' 2017-06-21 13:54:07 -04:00
Nick Mathewson
784b29a2bf Merge branch 'bug22356_029' into maint-0.3.1 2017-06-21 13:54:02 -04:00
Nick Mathewson
72b132e2a4 changes file for ticket22311 2017-06-21 13:49:17 -04:00
Nick Mathewson
35d6313500 Call it a BUG to use -1 in authdir_mode_handles_descs 2017-06-21 13:49:17 -04:00