--- gvpe/NEWS 2011/02/12 04:15:28 1.96 +++ gvpe/NEWS 2015/07/30 19:03:44 1.127 @@ -1,5 +1,113 @@ GVPE NEWS +TODO: bridge mode, finally? +TODO: gcm mode? +TODO: replace ripemd160 as the only authentication hash. +TODO: increase rsa size. +TODO: replace transport bits by transport endpoint structs? +TODO: http://incog-izick.blogspot.de/2011/08/using-openssl-aes-gcm.html +TODO: http://stackoverflow.com/questions/12153009/openssl-c-example-of-aes-gcm-using-evp-interfaces + +TODO: verify +TODO: make sense of overhead calculation +TODO: if-up &c should not be scripts? +TODO: ipv6 +TODO: gvpectrl should not use default privatekey,. or maybe document it better + - INCOMPATIBLE CHANGE: core protocol version 1.0. + - INCOMPATIBLE CHANGE: node sections are now introduced + with "node nodename", not "node = nodename". + - while individual packets couldn't be replayed, a whole session + could be replayed - this has been fixed by an extra key exchange. + - fix a delete vs. delete [] mismatch in the central logging function. + - in addition to rsa key exchange and authentication, the handshake now + adds a diffie-hellman key exchange (using curve25119) for perfect + forward secrecy. mac and cipher keys are derived using HKDF. + - rsa key sizes are now configurable and larger (default is 3072). + correspondingly, the minimum mtu is no longer 296 but 576. + - fixed a potential (unverified) buffer overrun on rsa decryption. + - new per-node low-power setting that tries to reduce cpu/network usage. + - router reconnects could cause excessive rekeying on other connections. + - gvpectrl no longer generates all missing public keys, but + only missing private keys. private keys are also put + into the configured location. + - the pid-file now accepts %s as nodename as elsewhere. + - switch to counter mode (only aes supported at the moment in + openssl). this gets rid of the need to generate a random iv, + is likely more secure (and, as a side effect, gets rid of + slow randomness generation. counter mode is often faster + then cbc mode as well, and packets are smaller). + - no longer use RAND_bytes to generate session keys - you NEED + a real source of entropy now (e.g. egd or /dev/random - see the + openssl documentation). + - multiple node statements for the same node are now supported + and will be merged. + - a new directive "global" switches back to the global section + of the config file. + - if-up scripts can now be specified with absolute paths. + - new global option: serial, to detect configuration mismatches. + - use HKDF as authentication proof, not HMAC or a plain hash + (hint by Ilmari Karonen). + - during rekeying or conenction establishments, hmac authentication + errors could occur and reset the connection. Transient hmac + authentication errors are now being ignored for 3 seconds. + - log the reason for a conneciton loss. + - use a (hopefully) constant time memcmp to compare internal secrets. + - fix a (harmless) errornous out of bounds stack read that would trigger + gcc's -fsanitize=address. + +2.25 Sat Jul 13 06:42:33 CEST 2013 + - INCOMPATIBLE CHANGE: no longer enable udp protocol if no other + protocols are enabled - this is necessary when you have nodes with + completely unknown protocols, to force mediated connection requests. + - INCOMPATIBLE CHANGE: dns transport protocol bumped to version 2. + - core protocol version 0.1, compatible with older releases. + - switch to using RSA_generate_key_ex, which is the badly documented + and needlessly more complicated replacement for the RSA_generate_key + function which is now deprecated. + - support additional hmac hashes: sha256 and sha512, usually truncated. + - change public exponent for rsa keys from 65535 to 65537, for + efficiency reasons - only affects new keys. + - nodes would sometimes declare transport endpoints valid despite + the protocol not being configured locally. + - new global configuration options: chroot, chuser, chuid, chgid, + to chroot to a specified or anonymous new root, and change user id. + - new global configuration options seed_device and seed_interval, + to configure another device than /dev/urandom for random seeds, + and to configure a regular interval to reseed the rng. + - prefer inet_aton over gethostbyname, as the latter is not guaranteed + to "resolve" literal ip addresses. + - configure didn't detect openssl 1.0 because SHA1_version became private + (patch by TANIGUCHI Takaki). + - fix a bug where nodes would tell the other side that it supports + the same protocols as that other side, instead of its own. + - add zlib when found, as openssl depends on it in newer versions. + - work around append-bugs in uclibc by using an extra seek. + - new "include" directive for the config file. + - gvpectrl no longer evaluates any "on" directives. + - icmp and rawip protocols weren't upgradable to each other. + - major, but incremental, dns transport improvements: + - do not simply abort in some error cases in the dns transport, + but try to recover. + - allow lowercase/uppercase aliases for base-n encodings that do + not rely on case. + - use base26 instead of base22 encoding for dns syn's, and + base36 instead of base22 for headers (saves one byte/packet). + - back off far quicker in dns tunnel when idling - increases + latency on an idle link somewhat, but avoids hundreds of + needless packets. + - poll more aggressively when idling in dns (poll once per + second as opposed to once per 5 seconds). + - reduce dns send payload size to allow greater rate of ack + messages (should help sack and ipv6). + - allow for ip options in rawip/icmp transports, even though gvpe + doesn't generate them. + - upgrade to autoconf 2.69, automake 1.11. + - upgrade to libev 4 API. + - replace COPYING file by actual GPLv3 - files were relicensed to GPLv3 + earlier but COPYING was forgotten. + +2.24 Sat Feb 12 05:15:48 CET 2011 + - protocol version 0.1, compatible with older releases. - due to a bug, when packets were lost, a connection could go into a state where a ping/connection request from another node would be ignored, leading to connections not being re-established. @@ -12,20 +120,20 @@ - clarify compression docs. 2.22 Sun Feb 1 17:25:28 CET 2009 - - protocol version 0.1, compatible with older releases, + - protocol version 0.1, compatible with older releases. - enabled icmp/tcp/http-proxy protocols by default. - updated copyright in program greetings. - fix some configure messages. - updated to libev 3.52. 2.21 Wed Sep 3 06:56:27 CEST 2008 - - protocol version 0.1, compatible with older releases, + - protocol version 0.1, compatible with older releases. - add missing ev++.h include header to tarball, which everybody who tested it apparently had in their include path :(. Caught by Karl Kleinpaste and Marcus Kong. 2.2 Mon Sep 1 06:28:09 CEST 2008 - - protocol version 0.1, compatible with older releases, + - protocol version 0.1, compatible with older releases. but upgrade is recommended to due changed ondemand behaviour. - new per-node options max-ttl and max-queue. - convert from iom.C to libev, a high-performance event loop