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Comparing gvpe/NEWS (file contents):
Revision 1.116 by root, Thu Jul 18 13:35:19 2013 UTC vs.
Revision 1.124 by root, Thu Jan 29 00:21:38 2015 UTC

… …
3TODO: bridge mode, finally? 3TODO: bridge mode, finally?
4TODO: gcm mode? 4TODO: gcm mode?
5TODO: replace ripemd160 as the only authentication hash. 5TODO: replace ripemd160 as the only authentication hash.
6TODO: increase rsa size. 6TODO: increase rsa size.
7TODO: replace transport bits by transport endpoint structs? 7TODO: replace transport bits by transport endpoint structs?
8TODO: ecdh to avoid session replay attacks
9TODO: http://incog-izick.blogspot.de/2011/08/using-openssl-aes-gcm.html 8TODO: http://incog-izick.blogspot.de/2011/08/using-openssl-aes-gcm.html
10TODO: http://stackoverflow.com/questions/12153009/openssl-c-example-of-aes-gcm-using-evp-interfaces 9TODO: http://stackoverflow.com/questions/12153009/openssl-c-example-of-aes-gcm-using-evp-interfaces
11 10
12proposed: 3 types, req, resreq, res
13
14req (hmac1) rsa(seqno1 hmac1 aes1 seqno2 hmac2 aes2 auth) ecdh1
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: protocol magic fixen(!!!)
23TODO: "global"
24TODO: verify 11TODO: verify
25TODO: make sense of overhead calculation 12TODO: make sense of overhead calculation
26TODO: use aes in ctr mode for IV values 13TODO: if-up &c should not be scripts?
14TODO: ipv6
15TODO: gvpectrl should not use default privatekey,. or maybe document it better
27 - INCOMPATIBLE CHANGE: core protocol version 1.0. 16 - INCOMPATIBLE CHANGE: core protocol version 1.0.
28 - INCOMPATIBLE CHANGE: node sextions are now introduced 17 - INCOMPATIBLE CHANGE: node sections are now introduced
29 with "node nodename", not "node = nodename". 18 with "node nodename", not "node = nodename".
30 - while individual packets couldn't be replayed, a whole session 19 - while individual packets couldn't be replayed, a whole session
31 could be replayed - this has been fixed by an extra key exchange. 20 could be replayed - this has been fixed by an extra key exchange.
32 - in addition to rsa key exchange and authentication, the handshake now 21 - in addition to rsa key exchange and authentication, the handshake now
33 adds a diffie-hellman key exchange (using curve25119) for perfect 22 adds a diffie-hellman key exchange (using curve25119) for perfect
34 forward secrecy. mac and cipher keys are derived using HKDF. 23 forward secrecy. mac and cipher keys are derived using HKDF.
35 - rsa key sizes are now configurable and larger (default is 3072). 24 - rsa key sizes are now configurable and larger (default is 3072).
36 correspondingly, the minimum mtu is no longer 296 but 576. 25 correspondingly, the minimum mtu is no longer 296 but 576.
37 - fixed a potential (unverified) buffer overrun on rsa decryption. 26 - fixed a potential (unverified) buffer overrun on rsa decryption.
27 - new per-node low-power setting that tries to reduce cpu/network usage.
28 - router reconnects could cause excessive rekeying on other connections.
38 - gvpectrl no longer generates all missing public keys, but 29 - gvpectrl no longer generates all missing public keys, but
39 only missing private keys. private keys are also put 30 only missing private keys. private keys are also put
40 into the configured location. 31 into the configured location.
41 - the pid-file now accepts %s as nodename as elsewhere. 32 - the pid-file now accepts %s as nodename as elsewhere.
33 - switch to counter mode (only aes supported at the moment in
34 openssl). this gets rid of the need to generate a random iv,
35 is likely more secure (and, as a side effect, gets rid of
36 slow randomness generation. counter mode is often faster
37 then cbc mode as well).
42 - no longer use RAND_bytes to generate session keys - you NEED 38 - no longer use RAND_bytes to generate session keys - you NEED
43 a real source of entropy now (e.g. egd or /dev/random - see the 39 a real source of entropy now (e.g. egd or /dev/random - see the
44 openssl documentation). 40 openssl documentation).
45 - multiple node statements for the same node are now supported 41 - multiple node statements for the same node are now supported
46 and will be merged. 42 and will be merged.
47 - a new directive "global" switches back to the global section 43 - a new directive "global" switches back to the global section
48 of the config file. 44 of the config file.
49 - 12 random prefix bytes are now properly supported, leading to
50 a fully random IV.
51 - use aes with a random key in counter-mode to generate IVs,
52 for speed reasons (generating 12 random bytes with openssl can
53 take longer than encrypting and mac'ing a 1.5kb packet, and IVs
54 do not need to be cryptographically strong random numbers
55 (and in fact, shouldn't be)).
56 - if-up scripts can now be specified with absolute paths. 45 - if-up scripts can now be specified with absolute paths.
46 - new global option: serial, to detect configuration mismatches.
47 - use HKDF as authentication proof, not HMAC or a plain hash
48 (hint by Ilmari Karonen).
49 - during rekeying or conenction establishments, hmac authentication
50 errors could occur and reset the connection. Transient hmac
51 authentication errors are now being ignored for 3 seconds.
52 - log the reason for a conneciton loss.
53 - use a (hopefully) constant time memcmp to compare internal secrets.
57 54
582.25 Sat Jul 13 06:42:33 CEST 2013 552.25 Sat Jul 13 06:42:33 CEST 2013
59 - INCOMPATIBLE CHANGE: no longer enable udp protocol if no other 56 - INCOMPATIBLE CHANGE: no longer enable udp protocol if no other
60 protocols are enabled - this is necessary when you have nodes with 57 protocols are enabled - this is necessary when you have nodes with
61 completely unknown protocols, to force mediated connection requests. 58 completely unknown protocols, to force mediated connection requests.

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