| 1 | /* |
1 | /* |
| 2 | connection.C -- manage a single connection |
2 | connection.C -- manage a single connection |
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3 | Copyright (C) 2003 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. |
| … | |
… | |
| 478 | } |
479 | } |
| 479 | |
480 | |
| 480 | bool config_packet::chk_config () const |
481 | bool config_packet::chk_config () const |
| 481 | { |
482 | { |
| 482 | if (prot_major != PROTOCOL_MAJOR) |
483 | if (prot_major != PROTOCOL_MAJOR) |
| 483 | slog (L_WARN, _("major version mismatch (%d <=> %d)"), prot_major, PROTOCOL_MAJOR); |
484 | slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR); |
| 484 | else if (randsize != RAND_SIZE) |
485 | else if (randsize != RAND_SIZE) |
| 485 | slog (L_WARN, _("rand size mismatch (%d <=> %d)"), randsize, RAND_SIZE); |
486 | slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE); |
| 486 | else if (hmaclen != HMACLENGTH) |
487 | else if (hmaclen != HMACLENGTH) |
| 487 | slog (L_WARN, _("hmac length mismatch (%d <=> %d)"), hmaclen, HMACLENGTH); |
488 | slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH); |
| 488 | else if (flags != curflags ()) |
489 | else if (flags != curflags ()) |
| 489 | slog (L_WARN, _("flag mismatch (%x <=> %x)"), flags, curflags ()); |
490 | slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ()); |
| 490 | else if (challengelen != sizeof (rsachallenge)) |
491 | else if (challengelen != sizeof (rsachallenge)) |
| 491 | slog (L_WARN, _("challenge length mismatch (%d <=> %d)"), challengelen, sizeof (rsachallenge)); |
492 | slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge)); |
| 492 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
493 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
| 493 | slog (L_WARN, _("cipher mismatch (%x <=> %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER)); |
494 | 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))) |
495 | 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)); |
496 | 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))) |
497 | else if (hmac_nid != htonl (EVP_MD_type (DIGEST))) |
| 497 | slog (L_WARN, _("hmac mismatch (%x <=> %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST)); |
498 | slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST)); |
| 498 | else |
499 | else |
| 499 | return true; |
500 | return true; |
| 500 | |
501 | |
| 501 | return false; |
502 | return false; |
| 502 | } |
503 | } |
| … | |
… | |
| 674 | connection::send_auth_request (const sockinfo &si, bool initiate) |
675 | connection::send_auth_request (const sockinfo &si, bool initiate) |
| 675 | { |
676 | { |
| 676 | auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols); |
677 | auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols); |
| 677 | |
678 | |
| 678 | rsachallenge chg; |
679 | rsachallenge chg; |
| 679 | |
|
|
| 680 | rsa_cache.gen (pkt->id, chg); |
680 | rsa_cache.gen (pkt->id, chg); |
| 681 | |
681 | 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 | |
682 | |
| 687 | slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si); |
683 | slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si); |
| 688 | |
684 | |
| 689 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly |
685 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly |
| 690 | |
686 | |
| … | |
… | |
| 907 | if (p->initiate) |
903 | if (p->initiate) |
| 908 | send_auth_request (rsi, false); |
904 | send_auth_request (rsi, false); |
| 909 | |
905 | |
| 910 | rsachallenge k; |
906 | rsachallenge k; |
| 911 | |
907 | |
| 912 | if (0 > RSA_private_decrypt (sizeof (p->encr), |
908 | if (!rsa_decrypt (::conf.rsa_key, p->encr, k)) |
| 913 | (unsigned char *)&p->encr, (unsigned char *)&k, |
909 | { |
| 914 | ::conf.rsa_key, RSA_PKCS1_OAEP_PADDING)) |
|
|
| 915 | slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"), |
910 | 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)); |
911 | conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0)); |
|
|
912 | break; |
|
|
913 | } |
| 917 | else |
914 | else |
| 918 | { |
915 | { |
| 919 | delete octx; |
916 | delete octx; |
| 920 | |
917 | |
| 921 | octx = new crypto_ctx (k, 1); |
918 | octx = new crypto_ctx (k, 1); |
