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Comparing gvpe/NEWS (file contents):
Revision 1.115 by root, Wed Jul 17 04:36:09 2013 UTC vs.
Revision 1.141 by root, Thu Oct 6 03:25:53 2022 UTC

1GVPE NEWS 1GVPE NEWS
2 2
3TODO: bridge mode, finally? 3TODO: updqate donna?
4TODO: gcm mode? 4TODO: clear one-time key/auth material from memory?
5TODO: replace ripemd160 as the only authentication hash. 5 - update embedded liblzf.
6TODO: increase rsa size. 6 - use liblzf with static hash table: lowers stack usage.
7TODO: replace transport bits by transport endpoint structs? 7 - do not initialise liblzf hash table for faster operation.
8TODO: ecdh to avoid session replay attacks 8 - use C++ variadic templates for callback.h, get rid of callback.pl.
9TODO: http://incog-izick.blogspot.de/2011/08/using-openssl-aes-gcm.html 9 - update autoconf.
10TODO: http://stackoverflow.com/questions/12153009/openssl-c-example-of-aes-gcm-using-evp-interfaces 10 - slightly modernise code.
11 - make use of ICMPFILTER again, this stopped working because it
12 is not defined in the glibc header files.
11 13
12proposed: 3 types, req, resreq, res 143.1 Sat Oct 27 07:50:43 CEST 2018
15 - port to openssl 1.1 BUT SEE WARNING IN configure.ac. Do not use!
16 - tinc cruft removal: remove getopt.[ch], it's less portable to
17 have it then to not have it.
18 - tinc cruft removal: use pkg-config to detect libressl/openssl.
19 - minor cleanups.
13 20
14req (hmac1) rsa(seqno1 hmac1 aes1 seqno2 hmac2 aes2 auth) ecdh1 213.0 Thu Nov 10 15:39:58 CET 2016
15res (hmac1) hash(rsa-contents) ecdh2
16
17req hmac0(*) rsa(seqno hmac0 hmac aes auth) hkdf-salt ecdh1
18res hmac0(rsa-contents ecdh2)
19 hmac_key = hkdf(hkdf-salt, hmac | ecdh)
20 aes_key = hkdf(hkdf-salt, aes | ecdh)
21
22TODO: very much larger intiial seed
23TODO: don't use RAND_pseudo_bytes :/
24 - INCOMPATIBLE CHANGE: core protocol version 1.0. 22 - INCOMPATIBLE CHANGE: core protocol version 1.0.
23 - INCOMPATIBLE CHANGE: node sections are now introduced
24 with "node nodename", not "node = nodename".
25 - INCOMPATIBLE CHANGE: gvpectrl -g will now generate a single
26 keypair, while -G will try to generate all keypairs as before.
27 - openssl 1.0.2 is the latest supported openssl release,
28 openssl 1.1.0 is not supported at the moment as the work to
29 make it compatible to both versions is just too much. a switch
30 to openssl 1.1 or another library will be done in a future release.
31 - update examples to not generate keys centrally, but locally on each
32 node.
33 - add workaround for temporary/rare ENOBUFS condition.
25 - while individual packets couldn't be replayed, a whole session 34 - while individual packets couldn't be replayed, a whole session
26 could be replayed - this has been fixed by an extra key exchange. 35 could be replayed - this has been fixed by an extra key exchange.
36 - fix a delete vs. delete [] mismatch in the central logging function.
27 - in addition to rsa key exchange and authentication, the handshake now 37 - in addition to rsa key exchange and authentication, the handshake now
28 adds a diffie-hellman key exchange (using curve25119) for perfect 38 adds a diffie-hellman key exchange (using curve25119) for perfect
29 forward secrecy. mac and cipher keys are derived using HKDF. 39 forward secrecy. mac and cipher keys are derived using HKDF.
30 - rsa key sizes are now configurable and larger (default is 3072). 40 - rsa key sizes are now configurable and larger (default is 3072).
31 correspondingly, the minimum mtu is no longer 296 but 576. 41 correspondingly, the minimum mtu is no longer 296 but 576.
32 - fixed a potential (unverified) buffer overrun on rsa decryption. 42 - fixed a potential (unverified) buffer overrun on rsa decryption.
43 - new per-node low-power setting that tries to reduce cpu/network usage.
44 - router reconnects could cause excessive rekeying on other connections.
33 - gvpectrl no longer generates all missing public keys, but 45 - gvpectrl no longer generates all missing public keys, but
34 only missing private keys. private keys are also put 46 only missing private keys. private keys are also put
35 into the configured location. 47 into the configured location.
36 - the pid-file now accepts %s as nodename as elsewhere. 48 - the pid-file now accepts %s as nodename as elsewhere.
49 - switch to counter mode (only aes supported at the moment in
50 openssl). this gets rid of the need to generate a random iv,
51 is likely more secure (and, as a side effect, gets rid of
52 slow randomness generation. counter mode is often faster
53 then cbc mode as well, and packets are smaller).
37 - no longer use RAND_bytes to generate session keys - you NEED 54 - no longer use RAND_bytes to generate session keys - you NEED
38 a real source of entropy now (e.g. egd or /dev/random - see the 55 a real source of entropy now (e.g. egd or /dev/random - see the
39 openssl documentation). 56 openssl documentation).
40 57 - multiple node statements for the same node are now supported
58 and will be merged.
59 - a new directive "global" switches back to the global section
60 of the config file.
61 - if-up scripts can now be specified with absolute paths.
62 - new global option: serial, to detect configuration mismatches.
63 - use HKDF as authentication proof, not HMAC or a plain hash
64 (hint by Ilmari Karonen).
65 - during rekeying or connection establishments, hmac authentication
66 errors could occur and reset the connection. Transient hmac
67 authentication errors are now being ignored for 3 seconds.
68 - log the reason for a conneciton loss.
69 - use a (hopefully) constant time memcmp to compare internal secrets.
70 - fix a (harmless) errornous out of bounds stack read that would trigger
71 gcc's -fsanitize=address.
72 - bump old packet window size from 512 to 65536.
73 - update for big changes in openssl 1.1 API, wrap primitives
74 to make further changes easier.
75 - correctly check return values for openssl 1.0.0 and later.
76 - check for both public and private key file when deciding whether
77 to skip generating a key to avoid accidental overwrites.
78
412.25 Sat Jul 13 06:42:33 CEST 2013 792.25 Sat Jul 13 06:42:33 CEST 2013
42 - INCOMPATIBLE CHANGE: no longer enable udp protocol if no other 80 - INCOMPATIBLE CHANGE: no longer enable udp protocol if no other
43 protocols are enabled - this is necessary when you have nodes with 81 protocols are enabled - this is necessary when you have nodes with
44 completely unknown protocols, to force mediated connection requests. 82 completely unknown protocols, to force mediated connection requests.
45 - INCOMPATIBLE CHANGE: dns transport protocol bumped to version 2. 83 - INCOMPATIBLE CHANGE: dns transport protocol bumped to version 2.
… …
54 the protocol not being configured locally. 92 the protocol not being configured locally.
55 - new global configuration options: chroot, chuser, chuid, chgid, 93 - new global configuration options: chroot, chuser, chuid, chgid,
56 to chroot to a specified or anonymous new root, and change user id. 94 to chroot to a specified or anonymous new root, and change user id.
57 - new global configuration options seed_device and seed_interval, 95 - new global configuration options seed_device and seed_interval,
58 to configure another device than /dev/urandom for random seeds, 96 to configure another device than /dev/urandom for random seeds,
59 and to configure a regular imterval to reseed the rng. 97 and to configure a regular interval to reseed the rng.
60 - prefer inet_aton over gethostbyname, as the latter is not guaranteed 98 - prefer inet_aton over gethostbyname, as the latter is not guaranteed
61 to "resolve" literal ip addresses. 99 to "resolve" literal ip addresses.
62 - configure didn't detect openssl 1.0 because SHA1_version became private 100 - configure didn't detect openssl 1.0 because SHA1_version became private
63 (patch by TANIGUCHI Takaki). 101 (patch by TANIGUCHI Takaki).
64 - fix a bug where nodes would tell the other side that it supports 102 - fix a bug where nodes would tell the other side that it supports
… …
69 - gvpectrl no longer evaluates any "on" directives. 107 - gvpectrl no longer evaluates any "on" directives.
70 - icmp and rawip protocols weren't upgradable to each other. 108 - icmp and rawip protocols weren't upgradable to each other.
71 - major, but incremental, dns transport improvements: 109 - major, but incremental, dns transport improvements:
72 - do not simply abort in some error cases in the dns transport, 110 - do not simply abort in some error cases in the dns transport,
73 but try to recover. 111 but try to recover.
74 - allow lowercase/uppercase alises for base-n encodings that do 112 - allow lowercase/uppercase aliases for base-n encodings that do
75 not rely on case. 113 not rely on case.
76 - use base26 instead of base22 encoding for dns syn's, and 114 - use base26 instead of base22 encoding for dns syn's, and
77 base36 instead of base22 for headers (saves one byte/packet). 115 base36 instead of base22 for headers (saves one byte/packet).
78 - back off far quicker in dns tunnel when idling - increases 116 - back off far quicker in dns tunnel when idling - increases
79 latency on an idle link somewhat, but avoids hundreds of 117 latency on an idle link somewhat, but avoids hundreds of

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