| … | |
… | |
| 17 | req hmac0(*) rsa(seqno hmac0 hmac aes auth) hkdf-salt ecdh1 |
17 | req hmac0(*) rsa(seqno hmac0 hmac aes auth) hkdf-salt ecdh1 |
| 18 | res hmac0(rsa-contents ecdh2) |
18 | res hmac0(rsa-contents ecdh2) |
| 19 | hmac_key = hkdf(hkdf-salt, hmac | ecdh) |
19 | hmac_key = hkdf(hkdf-salt, hmac | ecdh) |
| 20 | aes_key = hkdf(hkdf-salt, aes | ecdh) |
20 | aes_key = hkdf(hkdf-salt, aes | ecdh) |
| 21 | |
21 | |
| 22 | TODO: very much larger intiial seed |
22 | TODO: protocol magic fixen(!!!) |
| 23 | TODO: don't use RAND_pseudo_bytes :/ |
23 | TODO: "global" |
|
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24 | TODO: verify |
|
|
25 | TODO: make sense of overhead calculation |
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26 | TODO: if-up &c should not be scripts? |
|
|
27 | TODO: low-power |
|
|
28 | TODO: ipv6 |
| 24 | - INCOMPATIBLE CHANGE: core protocol version 1.0. |
29 | - INCOMPATIBLE CHANGE: core protocol version 1.0. |
|
|
30 | - INCOMPATIBLE CHANGE: node sextions are now introduced |
|
|
31 | with "node nodename", not "node = nodename". |
| 25 | - while individual packets couldn't be replayed, a whole session |
32 | - while individual packets couldn't be replayed, a whole session |
| 26 | could be replayed - this has been fixed by an extra key exchange. |
33 | could be replayed - this has been fixed by an extra key exchange. |
| 27 | - in addition to rsa key exchange and authentication, the handshake now |
34 | - in addition to rsa key exchange and authentication, the handshake now |
| 28 | adds a diffie-hellman key exchange (using curve25119) for perfect |
35 | adds a diffie-hellman key exchange (using curve25119) for perfect |
| 29 | forward secrecy. mac and cipher keys are derived using HKDF. |
36 | forward secrecy. mac and cipher keys are derived using HKDF. |
| 30 | - rsa key sizes are now configurable and larger (default is 3072). |
37 | - rsa key sizes are now configurable and larger (default is 3072). |
| 31 | correspondingly, the minimum mtu is no longer 296 but 576. |
38 | correspondingly, the minimum mtu is no longer 296 but 576. |
| 32 | - fixed a potential (unverified) buffer overrun on rsa decryption. |
39 | - fixed a potential (unverified) buffer overrun on rsa decryption. |
|
|
40 | - new per-node low-power setting that tries to reduce cpu/network usage. |
|
|
41 | - router reconnects could cause excessive rekeying on other connections. |
| 33 | - gvpectrl no longer generates all missing public keys, but |
42 | - gvpectrl no longer generates all missing public keys, but |
| 34 | only missing private keys. private keys are also put |
43 | only missing private keys. private keys are also put |
| 35 | into the configured location. |
44 | into the configured location. |
| 36 | - the pid-file now accepts %s as nodename as elsewhere. |
45 | - the pid-file now accepts %s as nodename as elsewhere. |
| 37 | - no longer use RAND_bytes to generate session keys - you NEED |
46 | - 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 |
47 | a real source of entropy now (e.g. egd or /dev/random - see the |
| 39 | openssl documentation). |
48 | openssl documentation). |
| 40 | |
49 | - multiple node statements for the same node are now supported |
|
|
50 | and will be merged. |
|
|
51 | - a new directive "global" switches back to the global section |
|
|
52 | of the config file. |
|
|
53 | - 12 random prefix bytes are now properly supported, leading to |
|
|
54 | a fully random IV. |
|
|
55 | - use aes with a random key in counter-mode to generate IVs, |
|
|
56 | for speed reasons (generating 12 random bytes with openssl can |
|
|
57 | take longer than encrypting and mac'ing a 1.5kb packet, and IVs |
|
|
58 | do not need to be cryptographically strong random numbers |
|
|
59 | (and in fact, shouldn't be)). |
|
|
60 | - if-up scripts can now be specified with absolute paths. |
|
|
61 | - new global option: serial, to detect configuration mismatches. |
|
|
62 | - use HKDF as authentication proof, not HMAC or a plain hash |
|
|
63 | (hint by Ilmari Karonen). |
|
|
64 | - during rekeying or conenction establishments, hmac authentication |
|
|
65 | errors could occur and reset the connection. Transient hmac |
|
|
66 | authentication errors are now being ignored for 3 seconds. |
|
|
67 | - log the reason for a conneciton loss. |
|
|
68 | - use a (hopefully) constant time memcmp to compare internal secrets. |
|
|
69 | |
| 41 | 2.25 Sat Jul 13 06:42:33 CEST 2013 |
70 | 2.25 Sat Jul 13 06:42:33 CEST 2013 |
| 42 | - INCOMPATIBLE CHANGE: no longer enable udp protocol if no other |
71 | - INCOMPATIBLE CHANGE: no longer enable udp protocol if no other |
| 43 | protocols are enabled - this is necessary when you have nodes with |
72 | protocols are enabled - this is necessary when you have nodes with |
| 44 | completely unknown protocols, to force mediated connection requests. |
73 | completely unknown protocols, to force mediated connection requests. |
| 45 | - INCOMPATIBLE CHANGE: dns transport protocol bumped to version 2. |
74 | - INCOMPATIBLE CHANGE: dns transport protocol bumped to version 2. |
| … | |
… | |
| 54 | the protocol not being configured locally. |
83 | the protocol not being configured locally. |
| 55 | - new global configuration options: chroot, chuser, chuid, chgid, |
84 | - new global configuration options: chroot, chuser, chuid, chgid, |
| 56 | to chroot to a specified or anonymous new root, and change user id. |
85 | to chroot to a specified or anonymous new root, and change user id. |
| 57 | - new global configuration options seed_device and seed_interval, |
86 | - new global configuration options seed_device and seed_interval, |
| 58 | to configure another device than /dev/urandom for random seeds, |
87 | to configure another device than /dev/urandom for random seeds, |
| 59 | and to configure a regular imterval to reseed the rng. |
88 | and to configure a regular interval to reseed the rng. |
| 60 | - prefer inet_aton over gethostbyname, as the latter is not guaranteed |
89 | - prefer inet_aton over gethostbyname, as the latter is not guaranteed |
| 61 | to "resolve" literal ip addresses. |
90 | to "resolve" literal ip addresses. |
| 62 | - configure didn't detect openssl 1.0 because SHA1_version became private |
91 | - configure didn't detect openssl 1.0 because SHA1_version became private |
| 63 | (patch by TANIGUCHI Takaki). |
92 | (patch by TANIGUCHI Takaki). |
| 64 | - fix a bug where nodes would tell the other side that it supports |
93 | - fix a bug where nodes would tell the other side that it supports |
| … | |
… | |
| 69 | - gvpectrl no longer evaluates any "on" directives. |
98 | - gvpectrl no longer evaluates any "on" directives. |
| 70 | - icmp and rawip protocols weren't upgradable to each other. |
99 | - icmp and rawip protocols weren't upgradable to each other. |
| 71 | - major, but incremental, dns transport improvements: |
100 | - major, but incremental, dns transport improvements: |
| 72 | - do not simply abort in some error cases in the dns transport, |
101 | - do not simply abort in some error cases in the dns transport, |
| 73 | but try to recover. |
102 | but try to recover. |
| 74 | - allow lowercase/uppercase alises for base-n encodings that do |
103 | - allow lowercase/uppercase aliases for base-n encodings that do |
| 75 | not rely on case. |
104 | not rely on case. |
| 76 | - use base26 instead of base22 encoding for dns syn's, and |
105 | - use base26 instead of base22 encoding for dns syn's, and |
| 77 | base36 instead of base22 for headers (saves one byte/packet). |
106 | base36 instead of base22 for headers (saves one byte/packet). |
| 78 | - back off far quicker in dns tunnel when idling - increases |
107 | - back off far quicker in dns tunnel when idling - increases |
| 79 | latency on an idle link somewhat, but avoids hundreds of |
108 | latency on an idle link somewhat, but avoids hundreds of |
