--- gvpe/NEWS 2004/03/21 13:15:42 1.19 +++ gvpe/NEWS 2015/01/17 08:42:50 1.123 @@ -1,45 +1,300 @@ - - protocol version 0.1, compatible with older releases. - - do not RESET on sequence number problems. +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. + - 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. + - 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. + - 12 random prefix bytes are now properly supported, leading to + a fully random IV. + - use aes with a random key in counter-mode to generate IVs, + for speed reasons (generating 12 random bytes with openssl can + take longer than encrypting and mac'ing a 1.5kb packet, and IVs + do not need to be cryptographically strong random numbers + (and in fact, shouldn't be)). + - 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. + +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. + - due to a bug, compression was almost always enabled. + - enable-max-mtu was actually enable-mtu, contrary to documentation. + - add nfmark support. + - add node-change script support. + - new DESTSI variable for node-xxx scripts. + - updated codingstyle a bit, declared truly static stuff as static. + - clarify compression docs. + +2.22 Sun Feb 1 17:25:28 CET 2009 + - 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. + - 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. + 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 + (http://software.schmorp.de/pkg/libev). + - tcp connections were leaking in some cases. + - retry more aggressively (once/s) to establish a connection if + new packets arrive for it. + - save a lot of setsockopt calls when the tos doesn't change. + - honor disabled even on initial connect attempt. + - changed callback mechanism to be slightly less portable + but more efficient mechanism (standards-compliant c++ compilers + should work). + - increased receive window positive size, to allow for massive + packet loss due to occasional longer drop-outs. + - send RST when a positive window size violation is detected, but + not in other cases, to reconnect more quickly. + - upgraded liblzf to version 3.4. + - dropped -fno-exceptions due to ev++.h using it. + - node-up/down scripts are now run in sequence. + - new -q switch for gvpectrl, for when you run it often. + - work around the horribly inconsistent, ad-hoc, ever-changing + and broken texinfo syntax. YMMV. avoid texinfo. + - keepalive is more aggressive now, sensding ping's every 3 seconds + and killing the conenction after 15 seconds. + - bugfixes. + +2.01 Thu Mar 29 19:26:04 CEST 2007 + - protocol version 0.1, compatible with older releases. + - bugfix of callback.h, might have cause callback return values to + be corrupted on architectures like sparc before. + - dns transport retries more aggressively. + - updated documentation, improved dns transport reliability + and throughput. + - added experimental support for sha256 and sha512 digests. + +2.0 Mon Dec 5 13:59:26 CET 2005 + - protocol version 0.1, compatible with older releases. + - implement allow-direct, deny-direct node config statements. + - implemented != for sockinfo. This fixes a bug where + gvpe sent packets to the old ip address of another host + even though it had received packets from it's new address. + This only causes problems if you forget to -HUP your gvpe after + your ip address changed, which is *required*. + - sets close-on-exec flag on tcp connections. This fixes a bug + where child processes kept tcp connections open and caused + connections to fail when only one side can connect. + - fixed a bug in receive sequence checking that made gvpe + accept out-of-window packets in most cases. + - tighter limit for the maximum sequence # to avoid overflow + conditions + allow more headroom for packet reordering. + - replace some asserts that trapped config mismatches by + more useful log messages. + - fix spurious extra newline in some log messages. + +1.9 Tue Apr 19 06:21:50 CEST 2005 + - protocol version 0.1, compatible with older releases. + - WARNING: this version checks the return value of if-up etc. + scripts and exits on failure. + - IMPORTANT: run if-up/node-up etc. scripts via /bin/sh. + - IMPORTANT: interface initialization (MAC, MTU) is now done + automatically in most configurations. + - options can now be specified on the gvpe command line, too. + - make some DNS transport values configurable and document them. + - improved OS specific information in gvpe.osdep(5). + - new tap device type "native/darwin", that supports the tap + driver available for darwin (thanks to matthew mead who tested + it out with me in a long session). tincd/darwin is still available. + - new device type "tincd/bsd", which is a newer version of the + *bsd-drivers taken from tinc. + - fixed a bug in relying on the order of global construction + when tcp transport was enabled. The fix makes it use no + cpu time unless it is in use, too. + - information about other nodes is now available to if-up etc. scripts. + - the value of the config variable if-up-data is passed to the if-up + etc. scripts. + - skip unparsable config lines with a warning instead of stopping + parsing and continuing with a certainly unusable config. + +1.8 Fri Mar 18 00:58:55 CET 2005 + - protocol version 0.1, compatible with older releases. + - enable-udp = yes is now default only when no other protocols + are enabled. otherwise it is disabled unless explicitly enabled. + - implemented dns tunneling (experimental now and in the future). + - remove support for pre-release version protocol. + - updated tincd drivers (rev 1433), added uml_socket driver, documented + tincd drivers a bit better. + - document icmp configuration values. + - document transport protocols in gvpe.protocol(7). + - remove unused ChangeLog file. + - created a mailinglist at gvpe@lists.schmorp.de. + - added an exemption to allow distribution of binaries linked against + OpenSSL, as suggested by Guus Sliepen (author of tinc). No + GNUTLS conversion in sight. + - some portability fixes with respect to --disable-nls. + +1.7 Tue Feb 22 23:58:59 CET 2005 + - protocol version 0.1, compatible with older releases. + - first gnu release. + - documented the special value 1 for router-priority. + - renamed vped => gvpe and vpectrl => gvpectrl, as well as + vped.conf => gvpe.conf. + - new per-node option "max-retry". + - asymmetric rekeying behaviour, so hosts don't rekey simultaneously. + - new configure option --enable-static-daemon. + - fix configure --help output. + - many documentation layout fixes. + - synced iom.[Ch] from rxvt-unicode. + - try to cope with some non-monotonic time changes. + - revert to locale.h - a usual, clocale is nonfunctioning on macosx. + - considerably improved pod2texi and the resulting texi doc. + +1.6.1 Wed May 12 14:48:20 CEST 2004 + - protocol version 0.1, compatible with older releases. + - fix -c switch that has been broken due to a last-minute fix + to option and config file parsing. + +1.6 Mon May 10 20:55:10 CEST 2004 + - protocol version 0.1, compatible with older releases. + - do not RESET on out-of-sequence packets (good for wireless). + - various non-security-related bugfixes. + - c++ify (at least make it compile with g++-3.4, which should make + it a little bit more standard c++). 1.5 Fri Jan 30 00:50:04 CET 2004 - - protocol version 0.1, compatible with older releases. - - vped will refuse to start when hostkey and public key do not match. - - updated lzf code to version 1.2. - - better error reporting for "unusual" conditions, like failing - to allocate memory, that should not normally happen and - will otherwise result in spurious other error messages. Also - adds paranoid checks in case openssl's API changes in a bad way. - - fix a bug where queued vpn packets were cleared to zero. while - this doesn't affect security, it did cause warning messages and - unnecessary connectivity delays. + - protocol version 0.1, compatible with older releases. + - vped will refuse to start when hostkey and public key do not match. + - updated lzf code to version 1.2. + - better error reporting for "unusual" conditions, like failing + to allocate memory, that should not normally happen and + will otherwise result in spurious other error messages. Also + adds paranoid checks in case openssl's API changes in a bad way. + - fix a bug where queued vpn packets were cleared to zero. while + this doesn't affect security, it did cause warning messages and + unnecessary connectivity delays. 1.4 Sat Jan 17 15:49:21 CET 2004 - - protocol version 0.1, compatible with older releases. - - better retry behaviour on key mismatch. - - use select-based io_manager instead of poll-based one. - - share io manager between rxvt-unicode and vpe. - - sooo many *BSD workarounds because no BSD I could find is even - remotely POSIX-compatible. + - protocol version 0.1, compatible with older releases. + - better retry behaviour on key mismatch. + - use select-based io_manager instead of poll-based one. + - share io manager between rxvt-unicode and vpe. + - sooo many *BSD workarounds because no BSD I could find is even + remotely POSIX-compatible. 1.2 Fri Oct 17 03:44:44 CEST 2003 - - protocol version 0.1. - - tincd kernel interface code imported, more supported platforms - (native/linux (2.4), tincd/linux (2.2 and 2.4), tincd/freebsd, - native/cygwin). - - added primitive ethernet emulation (ipv4 only), which allows - the following platforms that only have tun drivers to work: - /* none yet tested */ - - portability workarounds, especially for unfriendly freebsd - - very minor bugfixes - - warnings when choosing insecure ciphers/hashes - - reduced default hmac length to 8. - - cvs now contains configure, Makefile.in and other generated files. - - added doc/complex-example to the distribution. - -1.0 - - protocol version 0.1. - - tweaked various timeouts to help very slow (486) class - machines or nets with many hosts. - - tweaked rate-limiting to be more forgiving for hosts - connecting through routers (not a fix). + - protocol version 0.1. + - tincd kernel interface code imported, more supported platforms + (native/linux (2.4), tincd/linux (2.2 and 2.4), tincd/freebsd, + native/cygwin). + - added primitive ethernet emulation (ipv4 only), which allows + the following platforms that only have tun drivers to work: + /* none yet tested */ + - portability workarounds, especially for unfriendly freebsd + - very minor bugfixes + - warnings when choosing insecure ciphers/hashes + - reduced default hmac length to 8. + - cvs now contains configure, Makefile.in and other generated files. + - added doc/complex-example to the distribution. + +1.0 distant past + - protocol version 0.1. + - tweaked various timeouts to help very slow (486) class + machines or nets with many hosts. + - tweaked rate-limiting to be more forgiving for hosts + connecting through routers (not a fix).