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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 |
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25 | TODO: make sense of overhead calculation |
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26 | TODO: if-up &c should not be scripts? |
24 | - INCOMPATIBLE CHANGE: core protocol version 1.0. |
27 | - INCOMPATIBLE CHANGE: core protocol version 1.0. |
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28 | - INCOMPATIBLE CHANGE: node sextions are now introduced |
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29 | with "node nodename", not "node = nodename". |
25 | - while individual packets couldn't be replayed, a whole session |
30 | - while individual packets couldn't be replayed, a whole session |
26 | could be replayed - this has been fixed by an extra key exchange. |
31 | could be replayed - this has been fixed by an extra key exchange. |
27 | - in addition to rsa key exchange and authentication, the handshake now |
32 | - in addition to rsa key exchange and authentication, the handshake now |
28 | adds a diffie-hellman key exchange (using curve25119) for perfect |
33 | adds a diffie-hellman key exchange (using curve25119) for perfect |
29 | forward secrecy. mac and cipher keys are derived using HKDF. |
34 | forward secrecy. mac and cipher keys are derived using HKDF. |
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35 | into the configured location. |
40 | into the configured location. |
36 | - the pid-file now accepts %s as nodename as elsewhere. |
41 | - the pid-file now accepts %s as nodename as elsewhere. |
37 | - no longer use RAND_bytes to generate session keys - you NEED |
42 | - 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 |
43 | a real source of entropy now (e.g. egd or /dev/random - see the |
39 | openssl documentation). |
44 | openssl documentation). |
40 | |
45 | - multiple node statements for the same node are now supported |
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46 | and will be merged. |
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47 | - a new directive "global" switches back to the global section |
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48 | of the config file. |
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49 | - 12 random prefix bytes are now properly supported, leading to |
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50 | a fully random IV. |
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51 | - use aes with a random key in counter-mode to generate IVs, |
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52 | for speed reasons (generating 12 random bytes with openssl can |
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53 | take longer than encrypting and mac'ing a 1.5kb packet, and IVs |
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54 | do not need to be cryptographically strong random numbers |
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55 | (and in fact, shouldn't be)). |
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56 | - if-up scripts can now be specified with absolute paths. |
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57 | - new global option: serial, to detect configuration mismatches. |
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58 | - use HKDF as authentication proof, not HMAC or a plain hash |
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59 | (hint by Ilmari Karonen). |
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60 | |
41 | 2.25 Sat Jul 13 06:42:33 CEST 2013 |
61 | 2.25 Sat Jul 13 06:42:33 CEST 2013 |
42 | - INCOMPATIBLE CHANGE: no longer enable udp protocol if no other |
62 | - INCOMPATIBLE CHANGE: no longer enable udp protocol if no other |
43 | protocols are enabled - this is necessary when you have nodes with |
63 | protocols are enabled - this is necessary when you have nodes with |
44 | completely unknown protocols, to force mediated connection requests. |
64 | completely unknown protocols, to force mediated connection requests. |
45 | - INCOMPATIBLE CHANGE: dns transport protocol bumped to version 2. |
65 | - INCOMPATIBLE CHANGE: dns transport protocol bumped to version 2. |
… | |
… | |
54 | the protocol not being configured locally. |
74 | the protocol not being configured locally. |
55 | - new global configuration options: chroot, chuser, chuid, chgid, |
75 | - new global configuration options: chroot, chuser, chuid, chgid, |
56 | to chroot to a specified or anonymous new root, and change user id. |
76 | to chroot to a specified or anonymous new root, and change user id. |
57 | - new global configuration options seed_device and seed_interval, |
77 | - new global configuration options seed_device and seed_interval, |
58 | to configure another device than /dev/urandom for random seeds, |
78 | to configure another device than /dev/urandom for random seeds, |
59 | and to configure a regular imterval to reseed the rng. |
79 | and to configure a regular interval to reseed the rng. |
60 | - prefer inet_aton over gethostbyname, as the latter is not guaranteed |
80 | - prefer inet_aton over gethostbyname, as the latter is not guaranteed |
61 | to "resolve" literal ip addresses. |
81 | to "resolve" literal ip addresses. |
62 | - configure didn't detect openssl 1.0 because SHA1_version became private |
82 | - configure didn't detect openssl 1.0 because SHA1_version became private |
63 | (patch by TANIGUCHI Takaki). |
83 | (patch by TANIGUCHI Takaki). |
64 | - fix a bug where nodes would tell the other side that it supports |
84 | - fix a bug where nodes would tell the other side that it supports |
… | |
… | |
69 | - gvpectrl no longer evaluates any "on" directives. |
89 | - gvpectrl no longer evaluates any "on" directives. |
70 | - icmp and rawip protocols weren't upgradable to each other. |
90 | - icmp and rawip protocols weren't upgradable to each other. |
71 | - major, but incremental, dns transport improvements: |
91 | - major, but incremental, dns transport improvements: |
72 | - do not simply abort in some error cases in the dns transport, |
92 | - do not simply abort in some error cases in the dns transport, |
73 | but try to recover. |
93 | but try to recover. |
74 | - allow lowercase/uppercase alises for base-n encodings that do |
94 | - allow lowercase/uppercase aliases for base-n encodings that do |
75 | not rely on case. |
95 | not rely on case. |
76 | - use base26 instead of base22 encoding for dns syn's, and |
96 | - use base26 instead of base22 encoding for dns syn's, and |
77 | base36 instead of base22 for headers (saves one byte/packet). |
97 | base36 instead of base22 for headers (saves one byte/packet). |
78 | - back off far quicker in dns tunnel when idling - increases |
98 | - back off far quicker in dns tunnel when idling - increases |
79 | latency on an idle link somewhat, but avoids hundreds of |
99 | latency on an idle link somewhat, but avoids hundreds of |