1 | GVPE NEWS |
1 | GVPE NEWS |
2 | |
2 | |
3 | TODO: bridge mode, finally? |
3 | TODO: updqate donna? |
4 | TODO: gcm mode? |
4 | TODO: clear one-time key/auth material from memory? |
5 | TODO: replace ripemd160 as the only authentication hash. |
5 | - update embedded liblzf. |
6 | TODO: increase rsa size. |
6 | - use liblzf with static hash table: lowers stack usage. |
7 | TODO: replace transport bits by transport endpoint structs? |
7 | - do not initialise liblzf hash table for faster operation. |
8 | TODO: ecdh to avoid session replay attacks |
8 | - use C++ variadic templates for callback.h, get rid of callback.pl. |
9 | TODO: http://incog-izick.blogspot.de/2011/08/using-openssl-aes-gcm.html |
9 | - update autoconf. |
10 | TODO: http://stackoverflow.com/questions/12153009/openssl-c-example-of-aes-gcm-using-evp-interfaces |
10 | - slightly modernise code. |
|
|
11 | - make use of ICMPFILTER again, this stopped working because it |
|
|
12 | is not defined in the glibc header files. |
11 | |
13 | |
12 | proposed: 3 types, req, resreq, res |
14 | 3.1 Sat Oct 27 07:50:43 CEST 2018 |
|
|
15 | - port to openssl 1.1 BUT SEE WARNING IN configure.ac. Do not use! |
|
|
16 | - tinc cruft removal: remove getopt.[ch], it's less portable to |
|
|
17 | have it then to not have it. |
|
|
18 | - tinc cruft removal: use pkg-config to detect libressl/openssl. |
|
|
19 | - minor cleanups. |
13 | |
20 | |
14 | req (hmac1) rsa(seqno1 hmac1 aes1 seqno2 hmac2 aes2 auth) ecdh1 |
21 | 3.0 Thu Nov 10 15:39:58 CET 2016 |
15 | res (hmac1) hash(rsa-contents) ecdh2 |
|
|
16 | |
|
|
17 | req hmac0(*) rsa(seqno hmac0 hmac aes auth) hkdf-salt ecdh1 |
|
|
18 | res hmac0(rsa-contents ecdh2) |
|
|
19 | hmac_key = hkdf(hkdf-salt, hmac | ecdh) |
|
|
20 | aes_key = hkdf(hkdf-salt, aes | ecdh) |
|
|
21 | |
|
|
22 | - INCOMPATIBLE CHANGE: core protocol version 1.0. |
22 | - INCOMPATIBLE CHANGE: core protocol version 1.0. |
|
|
23 | - INCOMPATIBLE CHANGE: node sections are now introduced |
|
|
24 | with "node nodename", not "node = nodename". |
|
|
25 | - INCOMPATIBLE CHANGE: gvpectrl -g will now generate a single |
|
|
26 | keypair, while -G will try to generate all keypairs as before. |
|
|
27 | - openssl 1.0.2 is the latest supported openssl release, |
|
|
28 | openssl 1.1.0 is not supported at the moment as the work to |
|
|
29 | make it compatible to both versions is just too much. a switch |
|
|
30 | to openssl 1.1 or another library will be done in a future release. |
|
|
31 | - update examples to not generate keys centrally, but locally on each |
|
|
32 | node. |
|
|
33 | - add workaround for temporary/rare ENOBUFS condition. |
23 | - while individual packets couldn't be replayed, a whole session |
34 | - while individual packets couldn't be replayed, a whole session |
24 | could be replayed - this has been fixed by an extra key exchange. |
35 | could be replayed - this has been fixed by an extra key exchange. |
|
|
36 | - fix a delete vs. delete [] mismatch in the central logging function. |
25 | - in addition to rsa key exchange and authentication, the handshake now |
37 | - in addition to rsa key exchange and authentication, the handshake now |
26 | adds a diffie-hellman key exchange (using curve25119) for perfect |
38 | adds a diffie-hellman key exchange (using curve25119) for perfect |
27 | forward secrecy. mac and cipher keys are derived using HKDF. |
39 | forward secrecy. mac and cipher keys are derived using HKDF. |
28 | - rsa key sizes are now configurable and larger (default is 3072). |
40 | - rsa key sizes are now configurable and larger (default is 3072). |
29 | correspondingly, the minimum mtu is no longer 296 but 576. |
41 | correspondingly, the minimum mtu is no longer 296 but 576. |
30 | - fixed a potential (unverified) buffer overrun on rsa decryption. |
42 | - fixed a potential (unverified) buffer overrun on rsa decryption. |
31 | - RAND_bytes was used when generating session keys, potentially |
43 | - new per-node low-power setting that tries to reduce cpu/network usage. |
32 | leading to temporary freezes when entropy was low. |
44 | - router reconnects could cause excessive rekeying on other connections. |
33 | - gvpectrl no longer generates all missing public keys, but |
45 | - gvpectrl no longer generates all missing public keys, but |
34 | only missing private keys. private keys are also put |
46 | only missing private keys. private keys are also put |
35 | into the configured location. |
47 | into the configured location. |
36 | - the pid-file now accepts %s as nodename as elsewhere. |
48 | - the pid-file now accepts %s as nodename as elsewhere. |
37 | |
49 | - switch to counter mode (only aes supported at the moment in |
|
|
50 | openssl). this gets rid of the need to generate a random iv, |
|
|
51 | is likely more secure (and, as a side effect, gets rid of |
|
|
52 | slow randomness generation. counter mode is often faster |
|
|
53 | then cbc mode as well, and packets are smaller). |
|
|
54 | - no longer use RAND_bytes to generate session keys - you NEED |
|
|
55 | a real source of entropy now (e.g. egd or /dev/random - see the |
|
|
56 | openssl documentation). |
|
|
57 | - multiple node statements for the same node are now supported |
|
|
58 | and will be merged. |
|
|
59 | - a new directive "global" switches back to the global section |
|
|
60 | of the config file. |
|
|
61 | - if-up scripts can now be specified with absolute paths. |
|
|
62 | - new global option: serial, to detect configuration mismatches. |
|
|
63 | - use HKDF as authentication proof, not HMAC or a plain hash |
|
|
64 | (hint by Ilmari Karonen). |
|
|
65 | - during rekeying or connection establishments, hmac authentication |
|
|
66 | errors could occur and reset the connection. Transient hmac |
|
|
67 | authentication errors are now being ignored for 3 seconds. |
|
|
68 | - log the reason for a conneciton loss. |
|
|
69 | - use a (hopefully) constant time memcmp to compare internal secrets. |
|
|
70 | - fix a (harmless) errornous out of bounds stack read that would trigger |
|
|
71 | gcc's -fsanitize=address. |
|
|
72 | - bump old packet window size from 512 to 65536. |
|
|
73 | - update for big changes in openssl 1.1 API, wrap primitives |
|
|
74 | to make further changes easier. |
|
|
75 | - correctly check return values for openssl 1.0.0 and later. |
|
|
76 | - check for both public and private key file when deciding whether |
|
|
77 | to skip generating a key to avoid accidental overwrites. |
|
|
78 | |
38 | 2.25 Sat Jul 13 06:42:33 CEST 2013 |
79 | 2.25 Sat Jul 13 06:42:33 CEST 2013 |
39 | - INCOMPATIBLE CHANGE: no longer enable udp protocol if no other |
80 | - INCOMPATIBLE CHANGE: no longer enable udp protocol if no other |
40 | protocols are enabled - this is necessary when you have nodes with |
81 | protocols are enabled - this is necessary when you have nodes with |
41 | completely unknown protocols, to force mediated connection requests. |
82 | completely unknown protocols, to force mediated connection requests. |
42 | - INCOMPATIBLE CHANGE: dns transport protocol bumped to version 2. |
83 | - INCOMPATIBLE CHANGE: dns transport protocol bumped to version 2. |
… | |
… | |
51 | the protocol not being configured locally. |
92 | the protocol not being configured locally. |
52 | - new global configuration options: chroot, chuser, chuid, chgid, |
93 | - new global configuration options: chroot, chuser, chuid, chgid, |
53 | to chroot to a specified or anonymous new root, and change user id. |
94 | to chroot to a specified or anonymous new root, and change user id. |
54 | - new global configuration options seed_device and seed_interval, |
95 | - new global configuration options seed_device and seed_interval, |
55 | to configure another device than /dev/urandom for random seeds, |
96 | to configure another device than /dev/urandom for random seeds, |
56 | and to configure a regular imterval to reseed the rng. |
97 | and to configure a regular interval to reseed the rng. |
57 | - prefer inet_aton over gethostbyname, as the latter is not guaranteed |
98 | - prefer inet_aton over gethostbyname, as the latter is not guaranteed |
58 | to "resolve" literal ip addresses. |
99 | to "resolve" literal ip addresses. |
59 | - configure didn't detect openssl 1.0 because SHA1_version became private |
100 | - configure didn't detect openssl 1.0 because SHA1_version became private |
60 | (patch by TANIGUCHI Takaki). |
101 | (patch by TANIGUCHI Takaki). |
61 | - fix a bug where nodes would tell the other side that it supports |
102 | - fix a bug where nodes would tell the other side that it supports |
… | |
… | |
66 | - gvpectrl no longer evaluates any "on" directives. |
107 | - gvpectrl no longer evaluates any "on" directives. |
67 | - icmp and rawip protocols weren't upgradable to each other. |
108 | - icmp and rawip protocols weren't upgradable to each other. |
68 | - major, but incremental, dns transport improvements: |
109 | - major, but incremental, dns transport improvements: |
69 | - do not simply abort in some error cases in the dns transport, |
110 | - do not simply abort in some error cases in the dns transport, |
70 | but try to recover. |
111 | but try to recover. |
71 | - allow lowercase/uppercase alises for base-n encodings that do |
112 | - allow lowercase/uppercase aliases for base-n encodings that do |
72 | not rely on case. |
113 | not rely on case. |
73 | - use base26 instead of base22 encoding for dns syn's, and |
114 | - use base26 instead of base22 encoding for dns syn's, and |
74 | base36 instead of base22 for headers (saves one byte/packet). |
115 | base36 instead of base22 for headers (saves one byte/packet). |
75 | - back off far quicker in dns tunnel when idling - increases |
116 | - back off far quicker in dns tunnel when idling - increases |
76 | latency on an idle link somewhat, but avoids hundreds of |
117 | latency on an idle link somewhat, but avoids hundreds of |