1 | /* |
1 | /* |
2 | connection.C -- manage a single connection |
2 | connection.C -- manage a single connection |
|
|
3 | Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com> |
3 | |
4 | |
4 | This program is free software; you can redistribute it and/or modify |
5 | This program is free software; you can redistribute it and/or modify |
5 | it under the terms of the GNU General Public License as published by |
6 | it under the terms of the GNU General Public License as published by |
6 | the Free Software Foundation; either version 2 of the License, or |
7 | the Free Software Foundation; either version 2 of the License, or |
7 | (at your option) any later version. |
8 | (at your option) any later version. |
… | |
… | |
16 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
17 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
17 | */ |
18 | */ |
18 | |
19 | |
19 | #include "config.h" |
20 | #include "config.h" |
20 | |
21 | |
21 | extern "C" { |
22 | #include <cassert> |
22 | # include "lzf/lzf.h" |
|
|
23 | } |
|
|
24 | |
23 | |
25 | #include <list> |
24 | #include <list> |
26 | |
25 | |
27 | #include <openssl/rand.h> |
26 | #include <openssl/rand.h> |
28 | #include <openssl/evp.h> |
27 | #include <openssl/evp.h> |
… | |
… | |
43 | # define RAND_pseudo_bytes RAND_bytes |
42 | # define RAND_pseudo_bytes RAND_bytes |
44 | #endif |
43 | #endif |
45 | |
44 | |
46 | #define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic |
45 | #define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic |
47 | |
46 | |
|
|
47 | #define ULTRA_FAST 1 |
|
|
48 | #define HLOG 15 |
|
|
49 | #include "lzf/lzf.h" |
|
|
50 | #include "lzf/lzf_c.c" |
|
|
51 | #include "lzf/lzf_d.c" |
|
|
52 | |
48 | struct crypto_ctx |
53 | struct crypto_ctx |
49 | { |
54 | { |
50 | EVP_CIPHER_CTX cctx; |
55 | EVP_CIPHER_CTX cctx; |
51 | HMAC_CTX hctx; |
56 | HMAC_CTX hctx; |
52 | |
57 | |
… | |
… | |
55 | }; |
60 | }; |
56 | |
61 | |
57 | crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc) |
62 | crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc) |
58 | { |
63 | { |
59 | EVP_CIPHER_CTX_init (&cctx); |
64 | EVP_CIPHER_CTX_init (&cctx); |
60 | EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc); |
65 | require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc)); |
61 | HMAC_CTX_init (&hctx); |
66 | HMAC_CTX_init (&hctx); |
62 | HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0); |
67 | HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0); |
63 | } |
68 | } |
64 | |
69 | |
65 | crypto_ctx::~crypto_ctx () |
70 | crypto_ctx::~crypto_ctx () |
66 | { |
71 | { |
67 | EVP_CIPHER_CTX_cleanup (&cctx); |
72 | require (EVP_CIPHER_CTX_cleanup (&cctx)); |
68 | HMAC_CTX_cleanup (&hctx); |
73 | HMAC_CTX_cleanup (&hctx); |
69 | } |
74 | } |
70 | |
75 | |
71 | static void |
76 | static void |
72 | rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h) |
77 | rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h) |
73 | { |
78 | { |
74 | EVP_MD_CTX ctx; |
79 | EVP_MD_CTX ctx; |
75 | |
80 | |
76 | EVP_MD_CTX_init (&ctx); |
81 | EVP_MD_CTX_init (&ctx); |
77 | EVP_DigestInit (&ctx, RSA_HASH); |
82 | require (EVP_DigestInit (&ctx, RSA_HASH)); |
78 | EVP_DigestUpdate(&ctx, &chg, sizeof chg); |
83 | require (EVP_DigestUpdate(&ctx, &chg, sizeof chg)); |
79 | EVP_DigestUpdate(&ctx, &id, sizeof id); |
84 | require (EVP_DigestUpdate(&ctx, &id, sizeof id)); |
80 | EVP_DigestFinal (&ctx, (unsigned char *)&h, 0); |
85 | require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0)); |
81 | EVP_MD_CTX_cleanup (&ctx); |
86 | EVP_MD_CTX_cleanup (&ctx); |
82 | } |
87 | } |
83 | |
88 | |
84 | struct rsa_entry { |
89 | struct rsa_entry { |
85 | tstamp expire; |
90 | tstamp expire; |
… | |
… | |
133 | |
138 | |
134 | } rsa_cache; |
139 | } rsa_cache; |
135 | |
140 | |
136 | void rsa_cache::cleaner_cb (time_watcher &w) |
141 | void rsa_cache::cleaner_cb (time_watcher &w) |
137 | { |
142 | { |
138 | if (empty ()) |
143 | if (!empty ()) |
139 | w.at = TSTAMP_CANCEL; |
|
|
140 | else |
|
|
141 | { |
144 | { |
142 | w.at = NOW + RSA_TTL; |
145 | w.start (NOW + RSA_TTL); |
143 | |
146 | |
144 | for (iterator i = begin (); i != end (); ) |
147 | for (iterator i = begin (); i != end (); ) |
145 | if (i->expire <= NOW) |
148 | if (i->expire <= NOW) |
146 | i = erase (i); |
149 | i = erase (i); |
147 | else |
150 | else |
… | |
… | |
309 | } |
312 | } |
310 | |
313 | |
311 | #define MAXVPNDATA (MAX_MTU - 6 - 6) |
314 | #define MAXVPNDATA (MAX_MTU - 6 - 6) |
312 | #define DATAHDR (sizeof (u32) + RAND_SIZE) |
315 | #define DATAHDR (sizeof (u32) + RAND_SIZE) |
313 | |
316 | |
314 | struct vpndata_packet:vpn_packet |
317 | struct vpndata_packet : vpn_packet |
315 | { |
318 | { |
316 | u8 data[MAXVPNDATA + DATAHDR]; // seqno |
319 | u8 data[MAXVPNDATA + DATAHDR]; // seqno |
317 | |
320 | |
318 | void setup (connection *conn, int dst, u8 *d, u32 len, u32 seqno); |
321 | void setup (connection *conn, int dst, u8 *d, u32 len, u32 seqno); |
319 | tap_packet *unpack (connection *conn, u32 &seqno); |
322 | tap_packet *unpack (connection *conn, u32 &seqno); |
… | |
… | |
332 | int outl = 0, outl2; |
335 | int outl = 0, outl2; |
333 | ptype type = PT_DATA_UNCOMPRESSED; |
336 | ptype type = PT_DATA_UNCOMPRESSED; |
334 | |
337 | |
335 | #if ENABLE_COMPRESSION |
338 | #if ENABLE_COMPRESSION |
336 | u8 cdata[MAX_MTU]; |
339 | u8 cdata[MAX_MTU]; |
337 | u32 cl; |
|
|
338 | |
340 | |
|
|
341 | if (conn->features & ENABLE_COMPRESSION) |
|
|
342 | { |
339 | cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7); |
343 | u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7); |
|
|
344 | |
340 | if (cl) |
345 | if (cl) |
341 | { |
346 | { |
342 | type = PT_DATA_COMPRESSED; |
347 | type = PT_DATA_COMPRESSED; |
343 | d = cdata; |
348 | d = cdata; |
344 | l = cl + 2; |
349 | l = cl + 2; |
345 | |
350 | |
346 | d[0] = cl >> 8; |
351 | d[0] = cl >> 8; |
347 | d[1] = cl; |
352 | d[1] = cl; |
|
|
353 | } |
348 | } |
354 | } |
349 | #endif |
355 | #endif |
350 | |
356 | |
351 | EVP_EncryptInit_ex (cctx, 0, 0, 0, 0); |
357 | require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0)); |
352 | |
358 | |
353 | struct { |
359 | struct { |
354 | #if RAND_SIZE |
360 | #if RAND_SIZE |
355 | u8 rnd[RAND_SIZE]; |
361 | u8 rnd[RAND_SIZE]; |
356 | #endif |
362 | #endif |
… | |
… | |
360 | datahdr.seqno = ntohl (seqno); |
366 | datahdr.seqno = ntohl (seqno); |
361 | #if RAND_SIZE |
367 | #if RAND_SIZE |
362 | RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE); |
368 | RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE); |
363 | #endif |
369 | #endif |
364 | |
370 | |
365 | EVP_EncryptUpdate (cctx, |
371 | require (EVP_EncryptUpdate (cctx, |
366 | (unsigned char *) data + outl, &outl2, |
372 | (unsigned char *) data + outl, &outl2, |
367 | (unsigned char *) &datahdr, DATAHDR); |
373 | (unsigned char *) &datahdr, DATAHDR)); |
368 | outl += outl2; |
374 | outl += outl2; |
369 | |
375 | |
370 | EVP_EncryptUpdate (cctx, |
376 | require (EVP_EncryptUpdate (cctx, |
371 | (unsigned char *) data + outl, &outl2, |
377 | (unsigned char *) data + outl, &outl2, |
372 | (unsigned char *) d, l); |
378 | (unsigned char *) d, l)); |
373 | outl += outl2; |
379 | outl += outl2; |
374 | |
380 | |
375 | EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2); |
381 | require (EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2)); |
376 | outl += outl2; |
382 | outl += outl2; |
377 | |
383 | |
378 | len = outl + data_hdr_size (); |
384 | len = outl + data_hdr_size (); |
379 | |
385 | |
380 | set_hdr (type, dst); |
386 | set_hdr (type, dst); |
… | |
… | |
389 | int outl = 0, outl2; |
395 | int outl = 0, outl2; |
390 | tap_packet *p = new tap_packet; |
396 | tap_packet *p = new tap_packet; |
391 | u8 *d; |
397 | u8 *d; |
392 | u32 l = len - data_hdr_size (); |
398 | u32 l = len - data_hdr_size (); |
393 | |
399 | |
394 | EVP_DecryptInit_ex (cctx, 0, 0, 0, 0); |
400 | require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0)); |
395 | |
401 | |
396 | #if ENABLE_COMPRESSION |
402 | #if ENABLE_COMPRESSION |
397 | u8 cdata[MAX_MTU]; |
403 | u8 cdata[MAX_MTU]; |
398 | |
404 | |
399 | if (type == PT_DATA_COMPRESSED) |
405 | if (type == PT_DATA_COMPRESSED) |
… | |
… | |
401 | else |
407 | else |
402 | #endif |
408 | #endif |
403 | d = &(*p)[6 + 6 - DATAHDR]; |
409 | d = &(*p)[6 + 6 - DATAHDR]; |
404 | |
410 | |
405 | /* this overwrites part of the src mac, but we fix that later */ |
411 | /* this overwrites part of the src mac, but we fix that later */ |
406 | EVP_DecryptUpdate (cctx, |
412 | require (EVP_DecryptUpdate (cctx, |
407 | d, &outl2, |
413 | d, &outl2, |
408 | (unsigned char *)&data, len - data_hdr_size ()); |
414 | (unsigned char *)&data, len - data_hdr_size ())); |
409 | outl += outl2; |
415 | outl += outl2; |
410 | |
416 | |
411 | EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2); |
417 | require (EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2)); |
412 | outl += outl2; |
418 | outl += outl2; |
413 | |
419 | |
414 | seqno = ntohl (*(u32 *)(d + RAND_SIZE)); |
420 | seqno = ntohl (*(u32 *)(d + RAND_SIZE)); |
415 | |
421 | |
416 | id2mac (dst () ? dst() : THISNODE->id, p->dst); |
422 | id2mac (dst () ? dst() : THISNODE->id, p->dst); |
… | |
… | |
445 | { |
451 | { |
446 | // actually, hmaclen cannot be checked because the hmac |
452 | // actually, hmaclen cannot be checked because the hmac |
447 | // field comes before this data, so peers with other |
453 | // field comes before this data, so peers with other |
448 | // hmacs simply will not work. |
454 | // hmacs simply will not work. |
449 | u8 prot_major, prot_minor, randsize, hmaclen; |
455 | u8 prot_major, prot_minor, randsize, hmaclen; |
450 | u8 flags, challengelen, pad2, pad3; |
456 | u8 flags, challengelen, features, pad3; |
451 | u32 cipher_nid, digest_nid, hmac_nid; |
457 | u32 cipher_nid, digest_nid, hmac_nid; |
452 | |
|
|
453 | const u8 curflags () const |
|
|
454 | { |
|
|
455 | return 0x80 |
|
|
456 | | (ENABLE_COMPRESSION ? 0x01 : 0x00); |
|
|
457 | } |
|
|
458 | |
458 | |
459 | void setup (ptype type, int dst); |
459 | void setup (ptype type, int dst); |
460 | bool chk_config () const; |
460 | bool chk_config () const; |
461 | }; |
461 | }; |
|
|
462 | |
|
|
463 | #define FEATURES ((ENABLE_COMPRESSION ? FEATURE_COMPRESSION : 0) \ |
|
|
464 | | (ENABLE_ROHC ? FEATURE_ROHC : 0)) |
462 | |
465 | |
463 | void config_packet::setup (ptype type, int dst) |
466 | void config_packet::setup (ptype type, int dst) |
464 | { |
467 | { |
465 | prot_major = PROTOCOL_MAJOR; |
468 | prot_major = PROTOCOL_MAJOR; |
466 | prot_minor = PROTOCOL_MINOR; |
469 | prot_minor = PROTOCOL_MINOR; |
467 | randsize = RAND_SIZE; |
470 | randsize = RAND_SIZE; |
468 | hmaclen = HMACLENGTH; |
471 | hmaclen = HMACLENGTH; |
469 | flags = curflags (); |
472 | flags = ENABLE_COMPRESSION ? 0x81 : 0x80; |
470 | challengelen = sizeof (rsachallenge); |
473 | challengelen = sizeof (rsachallenge); |
|
|
474 | features = FEATURES; |
471 | |
475 | |
472 | cipher_nid = htonl (EVP_CIPHER_nid (CIPHER)); |
476 | cipher_nid = htonl (EVP_CIPHER_nid (CIPHER)); |
473 | digest_nid = htonl (EVP_MD_type (RSA_HASH)); |
477 | digest_nid = htonl (EVP_MD_type (RSA_HASH)); |
474 | hmac_nid = htonl (EVP_MD_type (DIGEST)); |
478 | hmac_nid = htonl (EVP_MD_type (DIGEST)); |
475 | |
479 | |
… | |
… | |
478 | } |
482 | } |
479 | |
483 | |
480 | bool config_packet::chk_config () const |
484 | bool config_packet::chk_config () const |
481 | { |
485 | { |
482 | if (prot_major != PROTOCOL_MAJOR) |
486 | if (prot_major != PROTOCOL_MAJOR) |
483 | slog (L_WARN, _("major version mismatch (%d <=> %d)"), prot_major, PROTOCOL_MAJOR); |
487 | slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR); |
484 | else if (randsize != RAND_SIZE) |
488 | else if (randsize != RAND_SIZE) |
485 | slog (L_WARN, _("rand size mismatch (%d <=> %d)"), randsize, RAND_SIZE); |
489 | slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE); |
486 | else if (hmaclen != HMACLENGTH) |
490 | else if (hmaclen != HMACLENGTH) |
487 | slog (L_WARN, _("hmac length mismatch (%d <=> %d)"), hmaclen, HMACLENGTH); |
491 | slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH); |
|
|
492 | #if 0 // this implementation should handle all flag settings |
488 | else if (flags != curflags ()) |
493 | else if (flags != curflags ()) |
489 | slog (L_WARN, _("flag mismatch (%x <=> %x)"), flags, curflags ()); |
494 | slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ()); |
|
|
495 | #endif |
490 | else if (challengelen != sizeof (rsachallenge)) |
496 | else if (challengelen != sizeof (rsachallenge)) |
491 | slog (L_WARN, _("challenge length mismatch (%d <=> %d)"), challengelen, sizeof (rsachallenge)); |
497 | slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge)); |
492 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
498 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
493 | slog (L_WARN, _("cipher mismatch (%x <=> %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER)); |
499 | slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER)); |
494 | else if (digest_nid != htonl (EVP_MD_type (RSA_HASH))) |
500 | else if (digest_nid != htonl (EVP_MD_type (RSA_HASH))) |
495 | slog (L_WARN, _("digest mismatch (%x <=> %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH)); |
501 | slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH)); |
496 | else if (hmac_nid != htonl (EVP_MD_type (DIGEST))) |
502 | else if (hmac_nid != htonl (EVP_MD_type (DIGEST))) |
497 | slog (L_WARN, _("hmac mismatch (%x <=> %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST)); |
503 | slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST)); |
498 | else |
504 | else |
499 | return true; |
505 | return true; |
500 | |
506 | |
501 | return false; |
507 | return false; |
502 | } |
508 | } |
503 | |
509 | |
504 | struct auth_req_packet : config_packet |
510 | struct auth_req_packet : config_packet |
505 | { |
511 | { |
506 | char magic[8]; |
512 | char magic[8]; |
507 | u8 initiate; // false if this is just an automatic reply |
513 | u8 initiate; // false if this is just an automatic reply |
508 | u8 protocols; // supported protocols (will get patches on forward) |
514 | u8 protocols; // supported protocols (will be patched on forward) |
509 | u8 pad2, pad3; |
515 | u8 pad2, pad3; |
510 | rsaid id; |
516 | rsaid id; |
511 | rsaencrdata encr; |
517 | rsaencrdata encr; |
512 | |
518 | |
513 | auth_req_packet (int dst, bool initiate_, u8 protocols_) |
519 | auth_req_packet (int dst, bool initiate_, u8 protocols_) |
… | |
… | |
597 | } |
603 | } |
598 | else |
604 | else |
599 | { |
605 | { |
600 | retry_cnt = 0; |
606 | retry_cnt = 0; |
601 | establish_connection.start (NOW + 5); |
607 | establish_connection.start (NOW + 5); |
602 | keepalive.reset (); |
608 | keepalive.stop (); |
603 | rekey.reset (); |
609 | rekey.stop (); |
604 | } |
610 | } |
605 | } |
611 | } |
606 | |
612 | |
607 | void |
613 | void |
608 | connection::reset_si () |
614 | connection::reset_si () |
… | |
… | |
674 | connection::send_auth_request (const sockinfo &si, bool initiate) |
680 | connection::send_auth_request (const sockinfo &si, bool initiate) |
675 | { |
681 | { |
676 | auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols); |
682 | auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols); |
677 | |
683 | |
678 | rsachallenge chg; |
684 | rsachallenge chg; |
679 | |
|
|
680 | rsa_cache.gen (pkt->id, chg); |
685 | rsa_cache.gen (pkt->id, chg); |
681 | |
686 | rsa_encrypt (conf->rsa_key, chg, pkt->encr); |
682 | if (0 > RSA_public_encrypt (sizeof chg, |
|
|
683 | (unsigned char *)&chg, (unsigned char *)&pkt->encr, |
|
|
684 | conf->rsa_key, RSA_PKCS1_OAEP_PADDING)) |
|
|
685 | fatal ("RSA_public_encrypt error"); |
|
|
686 | |
687 | |
687 | slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si); |
688 | slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si); |
688 | |
689 | |
689 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly |
690 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly |
690 | |
691 | |
… | |
… | |
724 | } |
725 | } |
725 | |
726 | |
726 | void |
727 | void |
727 | connection::establish_connection_cb (time_watcher &w) |
728 | connection::establish_connection_cb (time_watcher &w) |
728 | { |
729 | { |
729 | if (ictx || conf == THISNODE |
730 | if (!ictx |
|
|
731 | && conf != THISNODE |
730 | || connectmode == conf_node::C_NEVER |
732 | && connectmode != conf_node::C_NEVER |
731 | || connectmode == conf_node::C_DISABLED) |
733 | && connectmode != conf_node::C_DISABLED |
732 | w.at = TSTAMP_CANCEL; |
734 | && NOW > w.at) |
733 | else if (w.at <= NOW) |
|
|
734 | { |
735 | { |
735 | double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6; |
736 | double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6; |
736 | |
737 | |
737 | if (retry_int < 3600 * 8) |
738 | if (retry_int < 3600 * 8) |
738 | retry_cnt++; |
739 | retry_cnt++; |
739 | |
740 | |
740 | w.at = NOW + retry_int; |
741 | w.start (NOW + retry_int); |
741 | |
742 | |
742 | reset_si (); |
743 | reset_si (); |
743 | |
744 | |
744 | if (si.prot && !si.host) |
745 | if (si.prot && !si.host) |
745 | vpn->send_connect_request (conf->id); |
746 | vpn->send_connect_request (conf->id); |
… | |
… | |
776 | si.host= 0; |
777 | si.host= 0; |
777 | |
778 | |
778 | last_activity = 0; |
779 | last_activity = 0; |
779 | retry_cnt = 0; |
780 | retry_cnt = 0; |
780 | |
781 | |
781 | rekey.reset (); |
782 | rekey.stop (); |
782 | keepalive.reset (); |
783 | keepalive.stop (); |
783 | establish_connection.reset (); |
784 | establish_connection.stop (); |
784 | } |
785 | } |
785 | |
786 | |
786 | void |
787 | void |
787 | connection::shutdown () |
788 | connection::shutdown () |
788 | { |
789 | { |
… | |
… | |
793 | } |
794 | } |
794 | |
795 | |
795 | void |
796 | void |
796 | connection::rekey_cb (time_watcher &w) |
797 | connection::rekey_cb (time_watcher &w) |
797 | { |
798 | { |
798 | w.at = TSTAMP_CANCEL; |
|
|
799 | |
|
|
800 | reset_connection (); |
799 | reset_connection (); |
801 | establish_connection (); |
800 | establish_connection (); |
802 | } |
801 | } |
803 | |
802 | |
804 | void |
803 | void |
… | |
… | |
838 | { |
837 | { |
839 | if (ictx && octx) |
838 | if (ictx && octx) |
840 | send_vpn_packet (pkt, si, tos); |
839 | send_vpn_packet (pkt, si, tos); |
841 | else |
840 | else |
842 | { |
841 | { |
843 | vpn_queue.put (new vpn_packet (*pkt)); |
842 | vpn_queue.put ((vpn_packet *)new data_packet (*(data_packet *)pkt)); |
844 | |
843 | |
845 | establish_connection (); |
844 | establish_connection (); |
846 | } |
845 | } |
847 | } |
846 | } |
848 | |
847 | |
… | |
… | |
907 | if (p->initiate) |
906 | if (p->initiate) |
908 | send_auth_request (rsi, false); |
907 | send_auth_request (rsi, false); |
909 | |
908 | |
910 | rsachallenge k; |
909 | rsachallenge k; |
911 | |
910 | |
912 | if (0 > RSA_private_decrypt (sizeof (p->encr), |
911 | if (!rsa_decrypt (::conf.rsa_key, p->encr, k)) |
913 | (unsigned char *)&p->encr, (unsigned char *)&k, |
912 | { |
914 | ::conf.rsa_key, RSA_PKCS1_OAEP_PADDING)) |
|
|
915 | slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"), |
913 | slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"), |
916 | conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0)); |
914 | conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0)); |
|
|
915 | break; |
|
|
916 | } |
917 | else |
917 | else |
918 | { |
918 | { |
919 | delete octx; |
919 | delete octx; |
920 | |
920 | |
921 | octx = new crypto_ctx (k, 1); |
921 | octx = new crypto_ctx (k, 1); |
922 | oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
922 | oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
923 | |
923 | |
|
|
924 | // compatibility code, remove when no longer required |
|
|
925 | if (p->flags & 1) p->features |= FEATURE_COMPRESSION; |
|
|
926 | |
924 | conf->protocols = p->protocols; |
927 | conf->protocols = p->protocols; |
|
|
928 | features = p->features & FEATURES; |
925 | |
929 | |
926 | send_auth_response (rsi, p->id, k); |
930 | send_auth_response (rsi, p->id, k); |
927 | |
931 | |
928 | connection_established (); |
932 | connection_established (); |
929 | |
933 | |
… | |
… | |
965 | crypto_ctx *cctx = new crypto_ctx (chg, 0); |
969 | crypto_ctx *cctx = new crypto_ctx (chg, 0); |
966 | |
970 | |
967 | if (!p->hmac_chk (cctx)) |
971 | if (!p->hmac_chk (cctx)) |
968 | { |
972 | { |
969 | slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n" |
973 | slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n" |
970 | "could be an attack, or just corruption or an synchronization error"), |
974 | "could be an attack, or just corruption or a synchronization error"), |
971 | conf->nodename, (const char *)rsi); |
975 | conf->nodename, (const char *)rsi); |
972 | break; |
976 | break; |
973 | } |
977 | } |
974 | else |
978 | else |
975 | { |
979 | { |
… | |
… | |
1024 | { |
1028 | { |
1025 | vpndata_packet *p = (vpndata_packet *)pkt; |
1029 | vpndata_packet *p = (vpndata_packet *)pkt; |
1026 | |
1030 | |
1027 | if (!p->hmac_chk (ictx)) |
1031 | if (!p->hmac_chk (ictx)) |
1028 | slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n" |
1032 | slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n" |
1029 | "could be an attack, or just corruption or an synchronization error"), |
1033 | "could be an attack, or just corruption or a synchronization error"), |
1030 | conf->nodename, (const char *)rsi); |
1034 | conf->nodename, (const char *)rsi); |
1031 | else |
1035 | else |
1032 | { |
1036 | { |
1033 | u32 seqno; |
1037 | u32 seqno; |
1034 | tap_packet *d = p->unpack (this, seqno); |
1038 | tap_packet *d = p->unpack (this, seqno); |
… | |
… | |
1117 | { |
1121 | { |
1118 | reset_connection (); |
1122 | reset_connection (); |
1119 | establish_connection (); |
1123 | establish_connection (); |
1120 | } |
1124 | } |
1121 | else if (NOW < last_activity + ::conf.keepalive) |
1125 | else if (NOW < last_activity + ::conf.keepalive) |
1122 | w.at = last_activity + ::conf.keepalive; |
1126 | w.start (last_activity + ::conf.keepalive); |
1123 | else if (conf->connectmode != conf_node::C_ONDEMAND |
1127 | else if (conf->connectmode != conf_node::C_ONDEMAND |
1124 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
1128 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
1125 | { |
1129 | { |
1126 | send_ping (si); |
1130 | send_ping (si); |
1127 | w.at = NOW + 5; |
1131 | w.start (NOW + 5); |
1128 | } |
1132 | } |
1129 | else if (NOW < last_activity + ::conf.keepalive + 10) |
1133 | else if (NOW < last_activity + ::conf.keepalive + 10) |
1130 | // hold ondemand connections implicitly a few seconds longer |
1134 | // hold ondemand connections implicitly a few seconds longer |
1131 | // should delete octx, though, or something like that ;) |
1135 | // should delete octx, though, or something like that ;) |
1132 | w.at = last_activity + ::conf.keepalive + 10; |
1136 | w.start (last_activity + ::conf.keepalive + 10); |
1133 | else |
1137 | else |
1134 | reset_connection (); |
1138 | reset_connection (); |
1135 | } |
1139 | } |
1136 | |
1140 | |
1137 | void connection::send_connect_request (int id) |
1141 | void connection::send_connect_request (int id) |