… | |
… | |
197 | // only do action once every x seconds per host whole allowing bursts. |
197 | // only do action once every x seconds per host whole allowing bursts. |
198 | // this implementation ("splay list" ;) is inefficient, |
198 | // this implementation ("splay list" ;) is inefficient, |
199 | // but low on resources. |
199 | // but low on resources. |
200 | struct net_rate_limiter : list<net_rateinfo> |
200 | struct net_rate_limiter : list<net_rateinfo> |
201 | { |
201 | { |
202 | static const double ALPHA = 1. - 1. / 180.; // allow bursts |
202 | static const double ALPHA = 1. - 1. / 600.; // allow bursts |
203 | static const double CUTOFF = 10.; // one event every CUTOFF seconds |
203 | static const double CUTOFF = 10.; // one event every CUTOFF seconds |
204 | static const double EXPIRE = CUTOFF * 30.; // expire entries after this time |
204 | static const double EXPIRE = CUTOFF * 30.; // expire entries after this time |
205 | static const double MAXDIF = CUTOFF * (1. / (1. - ALPHA)); // maximum diff /count value |
205 | static const double MAXDIF = CUTOFF * (1. / (1. - ALPHA)); // maximum diff /count value |
206 | |
206 | |
207 | bool can (const sockinfo &si) { return can((u32)si.host); } |
207 | bool can (const sockinfo &si) { return can((u32)si.host); } |
208 | bool can (u32 host); |
208 | bool can (u32 host); |
209 | }; |
209 | }; |
210 | |
210 | |
211 | net_rate_limiter auth_rate_limiter, reset_rate_limiter; |
211 | net_rate_limiter auth_rate_limiter, reset_rate_limiter; |
212 | |
212 | |
… | |
… | |
475 | set_hdr (type, dst); |
475 | set_hdr (type, dst); |
476 | } |
476 | } |
477 | |
477 | |
478 | bool config_packet::chk_config () const |
478 | bool config_packet::chk_config () const |
479 | { |
479 | { |
480 | return prot_major == PROTOCOL_MAJOR |
480 | if (prot_major != PROTOCOL_MAJOR) |
481 | && randsize == RAND_SIZE |
481 | slog (L_WARN, _("major version mismatch (%d <=> %d)"), prot_major, PROTOCOL_MAJOR); |
482 | && hmaclen == HMACLENGTH |
482 | else if (randsize != RAND_SIZE) |
483 | && flags == curflags () |
483 | slog (L_WARN, _("rand size mismatch (%d <=> %d)"), randsize, RAND_SIZE); |
|
|
484 | else if (hmaclen != HMACLENGTH) |
|
|
485 | slog (L_WARN, _("hmac length mismatch (%d <=> %d)"), hmaclen, HMACLENGTH); |
|
|
486 | else if (flags != curflags ()) |
|
|
487 | slog (L_WARN, _("flag mismatch (%x <=> %x)"), flags, curflags ()); |
484 | && challengelen == sizeof (rsachallenge) |
488 | else if (challengelen != sizeof (rsachallenge)) |
|
|
489 | slog (L_WARN, _("challenge length mismatch (%d <=> %d)"), challengelen, sizeof (rsachallenge)); |
485 | && cipher_nid == htonl (EVP_CIPHER_nid (CIPHER)) |
490 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
|
|
491 | slog (L_WARN, _("cipher mismatch (%x <=> %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER)); |
486 | && digest_nid == htonl (EVP_MD_type (RSA_HASH)) |
492 | else if (digest_nid != htonl (EVP_MD_type (RSA_HASH))) |
|
|
493 | slog (L_WARN, _("digest mismatch (%x <=> %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH)); |
487 | && hmac_nid == htonl (EVP_MD_type (DIGEST)); |
494 | else if (hmac_nid != htonl (EVP_MD_type (DIGEST))) |
|
|
495 | slog (L_WARN, _("hmac mismatch (%x <=> %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST)); |
|
|
496 | else |
|
|
497 | return true; |
|
|
498 | |
|
|
499 | return false; |
488 | } |
500 | } |
489 | |
501 | |
490 | struct auth_req_packet : config_packet |
502 | struct auth_req_packet : config_packet |
491 | { |
503 | { |
492 | char magic[8]; |
504 | char magic[8]; |
… | |
… | |
898 | rsachallenge k; |
910 | rsachallenge k; |
899 | |
911 | |
900 | if (0 > RSA_private_decrypt (sizeof (p->encr), |
912 | if (0 > RSA_private_decrypt (sizeof (p->encr), |
901 | (unsigned char *)&p->encr, (unsigned char *)&k, |
913 | (unsigned char *)&p->encr, (unsigned char *)&k, |
902 | ::conf.rsa_key, RSA_PKCS1_OAEP_PADDING)) |
914 | ::conf.rsa_key, RSA_PKCS1_OAEP_PADDING)) |
903 | slog (L_ERR, _("%s(%s): challenge illegal or corrupted"), |
915 | slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"), |
904 | conf->nodename, (const char *)rsi); |
916 | conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0)); |
905 | else |
917 | else |
906 | { |
918 | { |
907 | delete octx; |
919 | delete octx; |
908 | |
920 | |
909 | octx = new crypto_ctx (k, 1); |
921 | octx = new crypto_ctx (k, 1); |
… | |
… | |
916 | connection_established (); |
928 | connection_established (); |
917 | |
929 | |
918 | break; |
930 | break; |
919 | } |
931 | } |
920 | } |
932 | } |
|
|
933 | else |
|
|
934 | slog (L_WARN, _("%s(%s): protocol mismatch"), |
|
|
935 | conf->nodename, (const char *)rsi); |
921 | |
936 | |
922 | send_reset (rsi); |
937 | send_reset (rsi); |
923 | } |
938 | } |
924 | |
939 | |
925 | break; |
940 | break; |