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@@ -1,3 +1,432 @@ +Changes in version 0.2.8.1-alpha - 2016-02-0? + XXXX Blurb goes here XXXX + + o Major features (consensus downloads): + - Schedule multiple in-progress consensus downloads during client + bootstrap. Use the first one that starts downloading, close the + rest. This reduces failures when authorities are slow or down. + Together with the code for feature 15775, it reduces failures due to fallback churn. + Implements ticket 4483 (reduce failures when authorities are down). + Patch by "teor". + Implements IPv4 portions of proposal 210 by "mikeperry" and + "teor". + + o Major features (controller): + - New "GETINFO hs/service/desc/id/" command to retrieve a hidden service + descriptor from a service's local hidden service descriptor cache. + Closes ticket 14846. + + o Major features (directory mirrors): + - Include an opt-in trial list of Default Fallback Directories in + add_default_fallback_dir_servers(). + "Tor has included a feature to fetch the initial consensus from nodes + other than the authorities for a while now. We just haven't shipped a + list of alternate locations for clients to go to yet. + Reasons why we might want to ship tor with a list of additional places + where clients can find the consensus is that it makes authority + reachability and BW less important. + We want them to have been around and using their current key, address, + and port for a while now (120 days), and have been running, a guard, + and a v2 directory mirror for most of that time." + We exclude BadExits and tor versions that aren't recommended. + We include an IPv6 address for each FallbackDir (see ticket 8374). + (Tor might not use IPv6 fallbacks until ticket the code for ticket6027 is merged.) + The unit test ensures that we successfully load all included + default fallback directories. + Closes ticket 15775. Patch by "teor". + OnionOO script by "weasel", "teor", "gsathya", and "karsten". + + o Major features (relay): + - When Tor is started as root on Linux and told to switch user ID, it + can now retain the capabilitity to bind to low ports. By default, + Tor will do this only when it's switching user ID and some low + ports have been configured. You can change this behavior with + the new option KeepBindCapabilities. Closes ticket 8195. + + o Minor feature (crypto): + - Add SHA512 support to crypto.c. Closes ticket 17663; patch from + George Tankersley. + + o Minor feature (directory downloads): + - Wait for busy authorities and fallbacks to become non-busy when + bootstrapping. (A similar change was made in 6c443e987d for + directory servers chosen from the consensus.) + Closes ticket 17864; patch by "teor". + + o Minor feature (fallback directories): + - Add UseDefaultFallbackDirs, which enables any hard-coded fallback + directory mirrors. Default is 1, set it to 0 to disable fallbacks. + Implements ticket 17576. Patch by "teor". + + o Minor feature (IPv6): + - Add a flag ipv6=address:orport to the DirAuthority and FallbackDir torrc + options. Add hard-coded ipv6 addresses for directory authorities with + ipv6 lines in their descriptors. + Closes ticket 17327; patch from Nick Mathewson / "teor". + - Add address policy assume_action support for IPv6 addresses. + - Limit IPv6 mask bits to 128. + - Warn when comparing against an AF_UNSPEC address in a policy, + it's almost always a bug. + Closes ticket 17863; patch by "teor". + + o Minor feature (logging): + - When logging to syslog, allow a tag to be added to the syslog + identity ("Tor"), i.e. the string prepended to every log message. + The tag can be configured by setting SyslogIdentityTag and defaults + to none. Setting it to "foo" will cause logs to be tagged as + "Tor-foo". Closes ticket 17194. + + o Minor feature (refactoring): + - Move logging of redundant policy entries in + policies_parse_exit_policy_internal into its own function. + Closes ticket 17608; patch from "juce". + + o Minor features (accounting): + - Added two modes to AccountingRule in torrc for + limiting just input or just output. + Closes ticket 15989; patch from "unixninja92". + + o Minor features (authorities): + - Update the V3 identity key for dannenberg: it was changed on + 18 November 2015. + Closes task 17906. Patch by "teor". + + o Minor features (build): + - Since our build process now uses 'make distcheck', we no longer force + "make dist" to depend on "make check". Closes ticket 17893; + patch from "cypherpunks." + + o Minor features (compilation): + - Repair some compilation issues with some recent (unreleased, alpha) + vesions of OpenSSL 1.1. Closes ticket 17549. + + o Minor features (controller): + - Adds FallbackDir entries to 'GETINFO config/defaults'. Closes tickets + 16774 and 17817. Patch by George Tankersley. + + o Minor features (crypto): + - When allocating a digest state object, allocate no more space than we + actually need. Previously, we were allocating as much space as the + state for the largest algorithm would need. This change saves up to + 672 bytes per circuit. Closes ticket 17796. + + o Minor features (directory system): + Previously only relays who explicitly opened a directory port (DirPort) + accepted directory requests from clients. Now all relays, with and without + a DirPort, who do not disable the DirCache option accept and serve + directory requests sent (tunnelled) through their ORPort. + Closes ticket 12538. + + o Minor features (exit policies, controllers): + - Add controller getinfo exit-policy/reject-private/[default,relay] + for the reject rules added by ExitPolicyRejectPrivate. This makes + it easier for stem to display exit policies. + - Add unit tests for getinfo exit-policy/*. + Finishes implementation for ticket 17183. Patch by "teor". + + o Minor features (fallback directories): + - Add a set of default fallback directories for the 0.2.8 alpha releases. + Closes ticket 17158. + Patch by "teor". + + o Minor features (geoip): + - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2 + Country database. + + o Minor features (IPv6 support): + - Allow users to configure directory authorities and fallback + directory servers with IPv6 addresses and ORPorts. Resolves + ticket 6027. + + o Minor features (portability): + - Use timingsafe_memcmp() where available. Closes ticket 17944; + patch from <logan@hackers.mu>. + + o Minor features (relay, address discovery): + - Add a family argument to get_interface_addresses_raw() and + subfunctions to make network interface address interogation more + efficient. Now Tor can specifically ask for IPv4, IPv6 or both + types of interfaces from the operating system. Resolves ticket 17950. + - When get_interface_address6_list(.,AF_UNSPEC,.) is called and fails + to enumerate interface addresses using the platform-specific API, + have it rely on the UDP socket fallback technique to try and find + out what IP addresses (both IPv4 and IPv6) our machine has. Resolves + ticket 17951. + + o Minor features (replaycache): + - The replay cache now uses SHA256 instead of SHA1. + Implements feature 8961. + Patch by "teor", issue reported by "rransom". + + o Minor features (security): + - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely, + positively are not allowed to fail. Previously we depended on + internals about OpenSSL behavior. Closes ticket 17686. + - Never use the system entropy output directly for anything besides + seeding the PRNG. When we want to generate important keys, instead + of using system entropy directly, hash it with the PRNG stream. + This may help resist certain attacks based on broken OS entropy + implementations. Closes part of ticket 17694. + - Set unused entires in a smartlist to NULL. This helped catch a + (harmless) bug, and shouldn't affect performance too much. + Implements ticket 17026. + - Use SecureMemoryWipe() function to securely clean memory on + Windows. Implements feature 17986. + - Use explicit_bzero or memset_s when present. Previously, we'd use + OpenSSL's OPENSSL_cleanse() function. + Closes ticket 7419; patches from <logan@hackers.mu> and <selven@hackers.mu>. + + o Minor features (security, clock): + - Warn when the system clock is set back in time (when the + state file was last written in the future). Tor doesn't know + that consensuses have expired if the clock is in the past. + Patch by "teor". Implements ticket 17188. + + o Minor features (security, cryptography): + - Use modern system calls to generate strong entropy on platforms that + provide them. Closes ticket 13696. + + o Minor features (testing): + - Log more information when the backtrace tests fail. + Closes ticket 17892. Patch from "cypherpunks." + + o Minor features (unit tests, random number generation): + - Add unit tests that check for common RNG failure modes, such as + returning all zeroes, identical values, or incrementing values + (OpenSSL's rand_predictable feature). + Patch by "teor". + + o Minor features (unix permissions): + - Defer creation of Unix sockets until after setuid. This avoids needing + CAP_CHOWN and CAP_FOWNER when using systemd's CapabilityBoundingSet, or + chown and fowner when using SELinux. + Implements part of ticket 17562. Patch from Jamie Nguyen. + - If any directory created by Tor is marked as group readable, the + filesystem group is allowed to be either the default GID or the root + user. Allowing root to read the DataDirectory prevents the need for + CAP_READ_SEARCH when using systemd's CapabilityBoundingSet, or + dac_read_search when using SELinux. + Implements part of ticket 17562. Patch from Jamie Nguyen. + - Introduce DataDirectoryGroupReadable boolean. If set to 1, the + DataDirectory will be made readable by the default GID. + Implements part of ticket 17562. Patch from Jamie Nguyen. + + o Minor bugfix (crypto): + - Check the return value of HMAC and assert on failure. + Fixes bug 17658; bugfix on 0.2.3.6-alpha. + Patch by "teor". + + o Minor bugfix (fallback directories): + - Mark fallbacks as "too busy" when they return a 503 response, + rather than just marking authorities. + Fixes bug 17572; bugfix on 5c51b3f1f0d4 released in 0.2.4.7-alpha. + Patch by "teor". + + o Minor bugfix (IPv6 compatibility, unit tests): + - Make tor_ersatz_socketpair work on IPv6-only systems. + Fixes bug 17638; bugfix on 0.0.2pre8. + Patch by "teor". + + o Minor bugfix (relays, hidden services): + - Refuse connection requests to private OR addresses unless + ExtendAllowPrivateAddresses is set. Previously, tor would + connect, then refuse to send any cells to a private address. + Fixes bugs 17674 and 8976; bugfix on 0.2.3.21-rc. + Patch by "teor". + + o Minor bugfix (SipHash-2-4 performance): + - Improve performance when hashing non-multiple of 8 sized buffers, + based on Andrew Moon's Public Domain SipHash-2-4 implementation. + Fixes bug 17544; bugfix on 0.2.5.3-alpha. + + o Minor bugfix (testing): + - The test for log_heartbeat was incorrectly failing in timezones + with non-integer offsets. Instead of comparing the end of the + time string against a constant, compare it to the output of + format_local_iso_time when given the correct input. + Fixes bug 18039; bugfix on 0.2.5.4-alpha. + + o Minor bugfix (unit tests): + - Make unit tests pass on IPv6-only systems, and systems without + localhost addresses (like some FreeBSD jails). + Fixes bug 17632; bugfix on 0.2.7.3-rc. + Patch by "teor". + + o Minor bugfixes (accounting): + - The max bandwidth when using AccountRule sum + is now correctly logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. + Patch from "unixninja92". + + o Minor bugfixes (build): + - Mark all object files that include micro-revision.i as depending on + it, so as to make our build more reliable with parallel builds. + Fixes bug 17826; bugfix on 0.2.5.1-alpha. + + o Minor bugfixes (client, correctness): + - When closing an entry connection, generate a warning if we should + have sent an end cell for it but we haven't. Fixes bug 17876; + bugfix on 0.2.3.2-alpha. + + o Minor bugfixes (code correctness): + - Assert that allocated memory held by the reputation code is freed + according to its internal counters. Fixes bug 17753; bugfix on + tor-0.1.1.1-alpha. + + o Minor bugfixes (compilation): + - Don't try to use the pthrad_condattr_setclock() function unless + it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug + 17819; bugfix on 0.2.6.3-alpha. + - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix on + tor-0.2.5.2-alpha. + - Fix compilation of sandbox.c with musl-libc. + Fixes bug 17347; bugfix on 0.2.5.1-alpha. + Patch from 'jamestk'. + - Fix search for libevent libraries on OpenBSD (and similar systems + which install libevent 1 and libevent 2 in parallel). Fixes bug + 16651; bugfix on 0.1.0.7-rc. + Patch from "rubiate". + - Isolate environment variables meant for tests from the rest of the + build system. Fixes bug 17818; bugfix on tor-0.2.7.3-rc. + - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix + on tor-0.0.2pre8. + + o Minor bugfixes (IPv6): + - Update the limits in max_dl_per_request for IPv6 address + length. Fixes bug 17573; bugfix on 0.2.1.5-alpha. + + o Minor bugfixes (linux seccomp2 sandbox): + - Fix a crash when using offline master ed25519 keys with the + Linux seccomp2 sandbox enabled. Fixes bug 17675; bugfix on + 0.2.7.3-alpha. + + o Minor bugfixes (logging): + - In log messages that include a function name, use __FUNCTION__ instead + of __PRETTY_FUNCTION__. In GCC, these are synonymous, but with clang + __PRETTY_FUNCTION__ has extra information we don't need. + Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van der Woerdt. + - Remove needless quotes from a log message about unparseable addresses. + Fixes bug 17843; bugfix on 0.2.3.3-alpha. + + o Minor bugfixes (makefile): + - Remove config.log only from make distclean, not from + make clean. Fixes bug 17924; bugfix on 0.2.4.1-alpha. + + o Minor bugfixes (portability): + - Remove an #endif from configure.ac so that we correctly detect + the presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix on + 0.2.0.13-alpha. + + o Minor bugfixes (relays): + - Check that both the ORPort and DirPort (if present) are reachable + before publishing a relay descriptor. Otherwise, relays publish a + descriptor with DirPort 0 when the DirPort reachability test takes + longer than the ORPort reachability test. + Fixes bug 18050; bugfix on 0.1.0.1-rc. + Reported by "starlight", patch by "teor". + + o Minor bugfixes (routersets, IPv6): + - routerset_parse now accepts IPv6 literal addresses. + Fixes bug 17060; bugfix on 0.2.1.3-alpha. Patch by "teor". + + o Minor bugfixes (safe logging): + - When logging a malformed hostname received through socks4, scrub it + if SafeLogging says we should. Fixes bug 17419; bugfix on 0.1.1.16-rc. + + o Minor bugfixes (security): + - Make memwipe() do nothing when passed a NULL pointer + or zero size. Check size argument to memwipe() for underflow. + Fixes bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. + Reported by "gk", patch by "teor". + + o Minor bugfixes (security, exit policies): + - ExitPolicyRejectPrivate rejects more private addresses by default. + Specifically, it rejects + the relay's outbound bind addresses (if configured), and + the relay's configured port addresses (such as ORPort and DirPort). + Fixes bug 17027; bugfix on 0.2.0.11-alpha. Patch by "teor". + + o Minor bugfixes (statistics code): + - Consistently check for overflow in round_*_to_next_multiple_of + functions, and add unit tests with additional and maximal values. + Fixes part of bug 13192; bugfix on 0.2.2.1-alpha. + - Handle edge cases in the laplace functions: avoid division by zero, + avoid taking the log of zero, and silence clang type conversion + warnings using round and trunc. Add unit tests for edge cases with + maximal values. Fixes part of bug 13192; bugfix on 0.2.6.2-alpha. + + o Minor bugfixes (tests): + - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix on + 0.2.4.8-alpha. + + o Minor bugfixes (TLS context): + - Assert when the TLS contexts fail to initialize. Fixes bug 17683; + bugfix on 0.0.6. + + o Minor bugfixes (unit tests): + - Check the full results of SHA256 and SHA512 digests in the + unit tests. Bugfix on 0.2.2.4-alpha. Patch by "teor". + + o Code simplification and refactoring: + - Extract the more complicated parts of circuit_mark_for_close into + a new function run periodically before connections are freed. + This change removes more than half of the functions currently + in the "blob". + Closes ticket 17218. + - Clean up a little duplicated code in crypto_expand_key_material_TAP. + Closes ticket 17587; patch from "pfrankw". + - Decouple the list of streams needing to be attached to circuits + from the overall connection list. This change makes it possible to + attach streams quickly while both simplifying Tor's callgraph and + avoiding O(N) scans of the entire connection list. Closes ticket + 17590. + - When a direct directory request fails immediately on launch, + instead of relaunching that request from inside the code that + launches it, instead mark the connection for teardown. This + change simplifies Tor's callback and prevents the directory- + request launching code from invoking itself recursively. + Closes ticket 17589. + + o Documentation: + - Add a description of the correct use of the '--keygen' command-line + option. Closes ticket 17583; based on text by 's7r'. + - Document the minimum HeartbeatPeriod value. Closes ticket 15638. + - Explain actual minima for BandwidthRate. Closes ticket 16382. + - Fix a minor formatting typo in the manpage. Closes ticket + 17791. + - Mention torspec URL in the manpage and point the reader to it + whenever we mention a document that belongs in torspce. + Fixes issue 17392. + + o Removed features: + - Remove client-side support for connecting to Tor servers running + versions of Tor before 0.2.3.6-alpha. These servers didn't + support the v3 TLS handshake protocol, and are no longer allowed + on the Tor network. Implements the client side of ticket + 11150. Based on patches by Tom van der Woerdt. + - Remove code for OpenSSL dynamic locks; OpenSSL doesn't use them. + Closes ticket 17926. + + o Testing: + - Always test both ed25519 backends, so that we can be sure that + our batch-open replacement code works. Part of ticket 16794. + - Cover dns_resolve_impl() in dns.c with unit tests. Implements a + portion of ticket 16831. + - More unit tests for compat_libevent.c. Closes ticket 17075. + Patch from Ola Bini. + - More unit tests for procmon.c. Closes ticket 17078. + Patch from Ola Bini. + - More unit tests for tortls.c. Closes ticket 17082. + Patch from Ola Bini. + - More unit tests for util_format.c. Closes ticket 17084. + Patch from Ola Bini. + - New tests for directory.c functions. Closes ticket 17003. Patch + from Ola Bini. + - New tests for options_validate. Closes ticket 17076. Patch from + Ola Bini. + - Unit tests for directory_handle_command_get. Closes ticket 17004. + Patch from Reinaldo de Souza Jr. + + Changes in version 0.2.7.6 - 2015-12-10 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as well as a minor bug in hidden service reliability. |