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