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2017-09-22Merge branch 'bug22805_v2_squashed'Nick Mathewson
2017-09-22Stop using CREATE_FAST as a signifier of clienthood.Nick Mathewson
Relays send it, and we may as well let them. Part of our fix for 22805.
2017-09-22Stop clearing the is_client flag on channel directlyNick Mathewson
2017-09-15Run our #else/#endif annotator on our source code.Nick Mathewson
2017-07-07Explicit length checks in circuit_init_cpath_crypto().George Kadianakis
2017-05-08Merge branch 'netflow_padding-v6-rebased2-squashed'Nick Mathewson
2017-05-08Fix issues from dgoulet's code review.Mike Perry
https://gitlab.com/dgoulet/tor/merge_requests/24
2017-05-08Netflow record collapsing defense.Mike Perry
This defense will cause Cisco, Juniper, Fortinet, and other routers operating in the default configuration to collapse netflow records that would normally be split due to the 15 second flow idle timeout. Collapsing these records should greatly reduce the utility of default netflow data for correlation attacks, since all client-side records should become 30 minute chunks of total bytes sent/received, rather than creating multiple separate records for every webpage load/ssh command interaction/XMPP chat/whatever else happens to be inactive for more than 15 seconds. The defense adds consensus parameters to govern the range of timeout values for sending padding packets, as well as for keeping connections open. The defense only sends padding when connections are otherwise inactive, and it does not pad connections used solely for directory traffic at all. By default it also doesn't pad inter-relay connections. Statistics on the total padding in the last 24 hours are exported to the extra-info descriptors.
2017-05-02Merge branch 'teor_connection-with-client-v2_squashed'Nick Mathewson
2017-05-02Accurately identify client connections by their lack of peer authenticationteor
This means that we bail out earlier if asked to extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix on 0.2.4.23.
2017-03-15Run the copyright update script.Nick Mathewson
2016-10-17Write a bunch of module documentation.Nick Mathewson
This commit adds or improves the module-level documenation for: buffers.c circuitstats.c command.c connection_edge.c control.c cpuworker.c crypto_curve25519.c crypto_curve25519.h crypto_ed25519.c crypto_format.c dircollate.c dirserv.c dns.c dns_structs.h fp_pair.c geoip.c hibernate.c keypin.c ntmain.c onion.c onion_fast.c onion_ntor.c onion_tap.c periodic.c protover.c protover.h reasons.c rephist.c replaycache.c routerlist.c routerparse.c routerset.c statefile.c status.c tor_main.c workqueue.c In particular, I've tried to explain (for each documented module) what each module does, what's in it, what the big idea is, why it belongs in Tor, and who calls it. In a few cases, I've added TODO notes about refactoring opportunities. I've also renamed an argument, and fixed a few DOCDOC comments.
2016-02-27Update the copyright year.Nick Mathewson
2015-08-17Remove redundant tor_free() in command_process_create_cell().Isis Lovecruft
* FIXES #16823: https://bugs.torproject.org/16823 If an OP were to send a CREATE_FAST cell to an OR, and that CREATE_FAST cell had unparseable key material, then tor_free() would be called on the create cell twice. This fix removes the second (conditional on the key material being bad) call to tor_free(), so that now the create cell is always freed once, regardless of the status of the key material. (This isn't actually a double-free bug, since tor_free() sets its input to NULL, and has no effect when called with input NULL.)
2015-02-02Merge remote-tracking branch 'public/bug9635_warnings_025'Nick Mathewson
Conflicts: src/test/test.c
2015-01-14Refactor cpuworker to use workqueue/threadpool code.Nick Mathewson
2015-01-02Bump copyright dates to 2015, in case someday this matters.Nick Mathewson
2014-12-19Add two hidden-service related statistics.George Kadianakis
The two statistics are: 1. number of RELAY cells observed on successfully established rendezvous circuits; and 2. number of .onion addresses observed as hidden-service directory. Both statistics are accumulated over 24 hours, obfuscated by rounding up to the next multiple of a given number and adding random noise, and written to local file stats/hidserv-stats. Notably, no statistics will be gathered on clients or services, but only on relays.
2014-10-28Add another year to our copyright dates.Nick Mathewson
Because in 95 years, we or our successors will surely care about enforcing the BSD license terms on this code. Right?
2014-10-16Downgrade 'invalid result from curve25519 handshake: 4' warningNick Mathewson
Also, refactor the way we handle failed handshakes so that this warning doesn't propagate itself to "onion_skin_client_handshake failed" and "circuit_finish_handshake failed" and "connection_edge_process_relay_cell (at origin) failed." Resolves warning from 9635.
2014-07-28Merge branch 'maint-0.2.4' into maint-0.2.5Roger Dingledine
2014-07-28Warn and drop the circuit if we receive an inbound 'relay early' cellRoger Dingledine
Those used to be normal to receive on hidden service circuits due to bug 1038, but the buggy Tor versions are long gone from the network so we can afford to resume watching for them. Resolves the rest of bug 1038; bugfix on 0.2.1.19.
2014-07-25circuit_build_failed: distinguish "first hop chan failed", "CREATE failed"Nick Mathewson
Roger spotted this on tor-dev in his comments on proposal 221. (Actually, detect DESTROY vs everything else, since arma likes network timeout indicating failure but not overload indicating failure.)
2014-06-13Also raise the check for 0 circuit ID in created cell.Nick Mathewson
And add a comment about why conditions that would cause us to drop a cell should get checked before actions that would cause us to send a destroy cell. Spotted by 'cypherpunks'. And note that these issues have been present since 0.0.8pre1 (commit 0da256ef), where we added a "shutting down" state, and started responding to all create cells with DESTROY when shutting down.
2014-06-10Move circuit-id-in-use check for CREATE cells to before all other checksNick Mathewson
This means that we never send a DESTROY cell in response to an attempt to CREATE an existing circuit. Fixes bug 12191.
2014-06-04Merge remote-tracking branch 'public/bug12195'Nick Mathewson
2014-06-03Fix ancient code that only checked circ_id, not circ_id and chanNick Mathewson
This code mis-handled the case where a circuit got the same circuit ID in both directions. I found three instances of it in the codebase, by grepping for [pn]_circ_id. Because of the issue in command_process_relay_cell(), this would have made roughly one circuit in a million completely nonfunctional. Fixes bug 12195.
2013-11-01Merge branch 'prop221_squashed_024'Nick Mathewson
Conflicts: src/or/or.h
2013-11-01circuit_build_failed: distinguish "got DESTROY" caseNick Mathewson
Roger spotted this on tor-dev in his comments on proposal 221. We etect DESTROY vs everything else, since arma likes network timeout indicating failure but not overload indicating failure.
2013-10-28Merge branch 'morestats4' into morestats5Karsten Loesing
Conflicts: doc/tor.1.txt src/or/config.c src/or/connection.h src/or/control.c src/or/control.h src/or/or.h src/or/relay.c src/or/relay.h src/test/test.c
2013-09-05collect and log statistics about onionskins received/processedRoger Dingledine
we skip onionskins that came from non-relays, so we're less likely to run into privacy troubles. starts to implement ticket 9658.
2013-05-25Tweak CELL_STATS event based on comments by nickm.Karsten Loesing
- Move cell_command_to_string from control.c to command.c. - Use accessor for global_circuitlist instead of extern. - Add a struct for cell statistics by command instead of six arrays. - Split up control_event_circuit_cell_stats by using two helper functions. - Add TestingEnableCellStatsEvent option. - Prepare functions for testing. - Rename a few variables and document a few things better.
2013-03-10Fix 8447: use %u to format circid_t.Nick Mathewson
Now that circid_t is 4 bytes long, the default integer promotions will leave it alone when sizeof(int) == 4, which will leave us formatting an unsigned as an int. That's technically undefined behavior. Fixes bug 8447 on bfffc1f0fc7616a25c32da2eb759dade4651659e. Bug not in any released Tor.
2013-02-15Merge remote-tracking branch 'public/wide_circ_ids'Nick Mathewson
Conflicts: src/or/channel.h src/or/connection_or.c src/or/cpuworker.c
2013-01-16Update the copyright date to 201.Nick Mathewson
2013-01-15Forward-port fix for 7889Nick Mathewson
2013-01-15Merge remote-tracking branch 'origin/maint-0.2.3'Nick Mathewson
2013-01-14Reject create/begin/etc cells with {circ,stream}ID 0.Nick Mathewson
Otherwise, it's possible to create streams or circuits with these bogus IDs, leading to orphaned circuits or streams, or to ones that can cause bandwidth DOS problems. Fixes bug 7889; bugfix on all released Tors.
2013-01-03Enable handling of create2/extend2/created2/extended2Nick Mathewson
2013-01-03Use created_cell_format where appropriateNick Mathewson
2013-01-03Teach cpuworker and others about create_cell_t and friendsNick Mathewson
The unit of work sent to a cpuworker is now a create_cell_t; its response is now a created_cell_t. Several of the things that call or get called by this chain of logic now take create_cell_t or created_cell_t too. Since all cpuworkers are forked or spawned by Tor, they don't need a stable wire protocol, so we can just send structs. This saves us some insanity, and helps p
2013-01-03Massive refactoring of the various handshake typesNick Mathewson
The three handshake types are now accessed from a unified interface; their state is abstracted from the rest of the cpath state, and so on.
2013-01-02Split onion.[ch] into onion{,_fast,_tap}.[ch]Nick Mathewson
I'm going to want a generic "onionskin" type and set of wrappers, and for that, it will be helpful to isolate the different circuit creation handshakes. Now the original handshake is in onion_tap.[ch], the CREATE_FAST handshake is in onion_fast.[ch], and onion.[ch] now handles the onion queue. This commit does nothing but move code and adjust header files.
2012-11-06Allow a v4 link protocol for 4-byte circuit IDs.Nick Mathewson
Implements proposal 214. Needs testing.
2012-10-23Fix a remotely triggerable assertion failure (CVE-2012-2250)Nick Mathewson
If we completed the handshake for the v2 link protocol but wound up negotiating the wong protocol version, we'd become so confused about what part of the handshake we were in that we'd promptly die with an assertion. This is a fix for CVE-2012-2250; it's a bugfix on 0.2.3.6-alpha. All servers running that version or later should really upgrade. Bug and fix from "some guy from France." I tweaked his code slightly to make it log the IP of the offending node.
2012-10-17Discard extraneous renegotiation attempts in the v3 link protocolNick Mathewson
Failure to do so left us open to a remotely triggerable assertion failure. Fixes CVE-2012-2249; bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
2012-10-15Merge remote-tracking branch 'public/bug1031'Nick Mathewson
2012-10-13fix trivial typoRoger Dingledine
2012-10-12Rename all reserved C identifiers we definedNick Mathewson
For everything we declare that starts with _, make it end with _ instead. This is a machine-generated patch. To make it, start by getting the list of reserved identifiers using: git ls-tree -r --name-only HEAD | grep '\.[ch]$' | \ xargs ctags --c-kinds=defglmpstuvx -o - | grep '^_' | \ cut -f 1 | sort| uniq You might need gnu ctags. Then pipe the output through this script: ============================== use strict; BEGIN { print "#!/usr/bin/perl -w -i -p\n\n"; } chomp; next if ( /^__attribute__/ or /^__func__/ or /^_FILE_OFFSET_BITS/ or /^_FORTIFY_SOURCE/ or /^_GNU_SOURCE/ or /^_WIN32/ or /^_DARWIN_UNLIMITED/ or /^_FILE_OFFSET_BITS/ or /^_LARGEFILE64_SOURCE/ or /^_LFS64_LARGEFILE/ or /^__cdecl/ or /^__attribute__/ or /^__func__/ or /^_WIN32_WINNT/); my $ident = $_; my $better = $ident; $better =~ s/^_//; $better = "${better}_"; print "s/(?<![A-Za-z0-9_])$ident(?![A-Za-z0-9_])/$better/g;\n"; ============================== Then run the resulting script on all the files you want to change. (That is, all the C except that in src/ext.) The resulting script was: ============================== s/(?<![A-Za-z0-9_])_address(?![A-Za-z0-9_])/address_/g; s/(?<![A-Za-z0-9_])_aes_fill_buf(?![A-Za-z0-9_])/aes_fill_buf_/g; s/(?<![A-Za-z0-9_])_AllowInvalid(?![A-Za-z0-9_])/AllowInvalid_/g; s/(?<![A-Za-z0-9_])_AP_CONN_STATE_MAX(?![A-Za-z0-9_])/AP_CONN_STATE_MAX_/g; s/(?<![A-Za-z0-9_])_AP_CONN_STATE_MIN(?![A-Za-z0-9_])/AP_CONN_STATE_MIN_/g; s/(?<![A-Za-z0-9_])_assert_cache_ok(?![A-Za-z0-9_])/assert_cache_ok_/g; s/(?<![A-Za-z0-9_])_A_UNKNOWN(?![A-Za-z0-9_])/A_UNKNOWN_/g; s/(?<![A-Za-z0-9_])_base(?![A-Za-z0-9_])/base_/g; s/(?<![A-Za-z0-9_])_BridgePassword_AuthDigest(?![A-Za-z0-9_])/BridgePassword_AuthDigest_/g; s/(?<![A-Za-z0-9_])_buffer_stats_compare_entries(?![A-Za-z0-9_])/buffer_stats_compare_entries_/g; s/(?<![A-Za-z0-9_])_chan_circid_entries_eq(?![A-Za-z0-9_])/chan_circid_entries_eq_/g; s/(?<![A-Za-z0-9_])_chan_circid_entry_hash(?![A-Za-z0-9_])/chan_circid_entry_hash_/g; s/(?<![A-Za-z0-9_])_check_no_tls_errors(?![A-Za-z0-9_])/check_no_tls_errors_/g; 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2012-10-10Merge branch 'bug6816_squashed_nowarn' of git://git.torproject.org/nickm/torAndrea Shepard
7apu2bq3rhoylwmucxizk54afw5jyda7pho4j5zdcqpwkufke7zdzwad.onion