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3 | TODO: bridge mode, finally? |
3 | TODO: bridge mode, finally? |
4 | TODO: gcm mode? |
4 | TODO: gcm mode? |
5 | TODO: replace ripemd160 as the only authentication hash. |
5 | TODO: replace ripemd160 as the only authentication hash. |
6 | TODO: increase rsa size. |
6 | TODO: increase rsa size. |
7 | TODO: replace transport bits by transport endpoint structs? |
7 | TODO: replace transport bits by transport endpoint structs? |
8 | TODO: ecdh to avoid session replay attacks |
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9 | TODO: http://incog-izick.blogspot.de/2011/08/using-openssl-aes-gcm.html |
8 | TODO: http://incog-izick.blogspot.de/2011/08/using-openssl-aes-gcm.html |
10 | TODO: http://stackoverflow.com/questions/12153009/openssl-c-example-of-aes-gcm-using-evp-interfaces |
9 | TODO: http://stackoverflow.com/questions/12153009/openssl-c-example-of-aes-gcm-using-evp-interfaces |
11 | |
10 | |
12 | proposed: 3 types, req, resreq, res |
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13 | |
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14 | req (hmac1) rsa(seqno1 hmac1 aes1 seqno2 hmac2 aes2 auth) ecdh1 |
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15 | res (hmac1) hash(rsa-contents) ecdh2 |
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16 | |
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17 | req hmac0(*) rsa(seqno hmac0 hmac aes auth) hkdf-salt ecdh1 |
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18 | res hmac0(rsa-contents ecdh2) |
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19 | hmac_key = hkdf(hkdf-salt, hmac | ecdh) |
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20 | aes_key = hkdf(hkdf-salt, aes | ecdh) |
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21 | |
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22 | TODO: protocol magic fixen(!!!) |
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23 | TODO: "global" |
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24 | TODO: verify |
11 | TODO: verify |
25 | TODO: make sense of overhead calculation |
12 | TODO: make sense of overhead calculation |
26 | TODO: if-up &c should not be scripts? |
13 | TODO: if-up &c should not be scripts? |
27 | TODO: low-power |
14 | TODO: ipv6 |
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15 | TODO: gvpectrl should not use default privatekey,. or maybe document it better |
28 | - INCOMPATIBLE CHANGE: core protocol version 1.0. |
16 | - INCOMPATIBLE CHANGE: core protocol version 1.0. |
29 | - INCOMPATIBLE CHANGE: node sextions are now introduced |
17 | - INCOMPATIBLE CHANGE: node sections are now introduced |
30 | with "node nodename", not "node = nodename". |
18 | with "node nodename", not "node = nodename". |
31 | - while individual packets couldn't be replayed, a whole session |
19 | - while individual packets couldn't be replayed, a whole session |
32 | 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. |
33 | - in addition to rsa key exchange and authentication, the handshake now |
21 | - in addition to rsa key exchange and authentication, the handshake now |
34 | adds a diffie-hellman key exchange (using curve25119) for perfect |
22 | adds a diffie-hellman key exchange (using curve25119) for perfect |
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40 | - router reconnects could cause excessive rekeying on other connections. |
28 | - router reconnects could cause excessive rekeying on other connections. |
41 | - gvpectrl no longer generates all missing public keys, but |
29 | - gvpectrl no longer generates all missing public keys, but |
42 | only missing private keys. private keys are also put |
30 | only missing private keys. private keys are also put |
43 | into the configured location. |
31 | into the configured location. |
44 | - the pid-file now accepts %s as nodename as elsewhere. |
32 | - the pid-file now accepts %s as nodename as elsewhere. |
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33 | - switch to counter mode (only aes supported at the moment in |
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34 | openssl). this gets rid of the need to generate a random iv, |
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35 | is likely more secure (and, as a side effect, gets rid of |
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36 | slow randomness generation. counter mode is often faster |
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37 | then cbc mode as well, and packets are smaller). |
45 | - no longer use RAND_bytes to generate session keys - you NEED |
38 | - no longer use RAND_bytes to generate session keys - you NEED |
46 | 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 |
47 | openssl documentation). |
40 | openssl documentation). |
48 | - multiple node statements for the same node are now supported |
41 | - multiple node statements for the same node are now supported |
49 | and will be merged. |
42 | and will be merged. |
50 | - a new directive "global" switches back to the global section |
43 | - a new directive "global" switches back to the global section |
51 | of the config file. |
44 | of the config file. |
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. |
45 | - if-up scripts can now be specified with absolute paths. |
60 | - new global option: serial, to detect configuration mismatches. |
46 | - new global option: serial, to detect configuration mismatches. |
61 | - use HKDF as authentication proof, not HMAC or a plain hash |
47 | - use HKDF as authentication proof, not HMAC or a plain hash |
62 | (hint by Ilmari Karonen). |
48 | (hint by Ilmari Karonen). |
63 | - during rekeying or conenction establishments, hmac authentication |
49 | - during rekeying or conenction establishments, hmac authentication |
64 | errors could occur and reset the connection. Transient hmac |
50 | errors could occur and reset the connection. Transient hmac |
65 | authentication errors are now being ignored for 3 seconds. |
51 | authentication errors are now being ignored for 3 seconds. |
66 | - log the reason for a conneciton loss. |
52 | - log the reason for a conneciton loss. |
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53 | - use a (hopefully) constant time memcmp to compare internal secrets. |
67 | |
54 | |
68 | 2.25 Sat Jul 13 06:42:33 CEST 2013 |
55 | 2.25 Sat Jul 13 06:42:33 CEST 2013 |
69 | - INCOMPATIBLE CHANGE: no longer enable udp protocol if no other |
56 | - INCOMPATIBLE CHANGE: no longer enable udp protocol if no other |
70 | protocols are enabled - this is necessary when you have nodes with |
57 | protocols are enabled - this is necessary when you have nodes with |
71 | completely unknown protocols, to force mediated connection requests. |
58 | completely unknown protocols, to force mediated connection requests. |