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