/* $OpenBSD: ike.c,v 1.64 2008/07/01 15:00:53 bluhm Exp $ */ /* * Copyright (c) 2005 Hans-Joerg Hoexer * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ipsecctl.h" static void ike_section_general(struct ipsec_rule *, FILE *); static void ike_section_peer(struct ipsec_rule *, FILE *); static void ike_section_ids(struct ipsec_rule *, FILE *); static void ike_section_ipsec(struct ipsec_rule *, FILE *); static int ike_section_p1(struct ipsec_rule *, FILE *); static int ike_section_p2(struct ipsec_rule *, FILE *); static void ike_section_p2ids(struct ipsec_rule *, FILE *); static int ike_connect(struct ipsec_rule *, FILE *); static int ike_gen_config(struct ipsec_rule *, FILE *); static int ike_delete_config(struct ipsec_rule *, FILE *); static void ike_setup_ids(struct ipsec_rule *); int ike_print_config(struct ipsec_rule *, int); int ike_ipsec_establish(int, struct ipsec_rule *); #define SET "C set " #define ADD "C add " #define DELETE "C rms " #define RMV "C rmv " #define ISAKMPD_FIFO "/var/run/isakmpd.fifo" #define CONF_DFLT_DYNAMIC_DPD_CHECK_INTERVAL 5 #define CONF_DFLT_DYNAMIC_CHECK_INTERVAL 30 char *ike_id_types[] = { "", "", "FQDN", "USER_FQDN" }; static void ike_section_general(struct ipsec_rule *r, FILE *fd) { if (r->ikemode == IKE_DYNAMIC) { fprintf(fd, SET "[General]:Check-interval=%d force\n", CONF_DFLT_DYNAMIC_CHECK_INTERVAL); fprintf(fd, SET "[General]:DPD-check-interval=%d force\n", CONF_DFLT_DYNAMIC_DPD_CHECK_INTERVAL); } if (r->p1life && r->p1life->lifetime != -1) fprintf(fd, SET "[General]:Default-phase-1-lifetime=%d force\n", r->p1life->lifetime); if (r->p2life && r->p2life->lifetime != -1) fprintf(fd, SET "[General]:Default-phase-2-lifetime=%d force\n", r->p2life->lifetime); } static void ike_section_peer(struct ipsec_rule *r, FILE *fd) { if (r->peer) fprintf(fd, SET "[Phase 1]:%s=%s force\n", r->peer->name, r->p1name); else fprintf(fd, SET "[Phase 1]:Default=%s force\n", r->p1name); fprintf(fd, SET "[%s]:Phase=1 force\n", r->p1name); if (r->peer) fprintf(fd, SET "[%s]:Address=%s force\n", r->p1name, r->peer->name); if (r->local) fprintf(fd, SET "[%s]:Local-address=%s force\n", r->p1name, r->local->name); if (r->ikeauth->type == IKE_AUTH_PSK) fprintf(fd, SET "[%s]:Authentication=%s force\n", r->p1name, r->ikeauth->string); } static void ike_section_ids(struct ipsec_rule *r, FILE *fd) { char myname[MAXHOSTNAMELEN]; if (r->auth == NULL) return; if (r->ikemode == IKE_DYNAMIC && r->auth->srcid == NULL) { if (gethostname(myname, sizeof(myname)) == -1) err(1, "ike_section_ids: gethostname"); if ((r->auth->srcid = strdup(myname)) == NULL) err(1, "ike_section_ids: strdup"); } if (r->auth->srcid) { fprintf(fd, SET "[%s]:ID=id-%s force\n", r->p1name, r->auth->srcid); fprintf(fd, SET "[id-%s]:ID-type=%s force\n", r->auth->srcid, ike_id_types[r->auth->srcid_type]); fprintf(fd, SET "[id-%s]:Name=%s force\n", r->auth->srcid, r->auth->srcid); } if (r->auth->dstid) { fprintf(fd, SET "[%s]:Remote-ID=id-%s force\n", r->p1name, r->auth->dstid); fprintf(fd, SET "[id-%s]:ID-type=%s force\n", r->auth->dstid, ike_id_types[r->auth->dstid_type]); fprintf(fd, SET "[id-%s]:Name=%s force\n", r->auth->dstid, r->auth->dstid); } } static void ike_section_ipsec(struct ipsec_rule *r, FILE *fd) { fprintf(fd, SET "[%s]:Phase=2 force\n", r->p2name); fprintf(fd, SET "[%s]:ISAKMP-peer=%s force\n", r->p2name, r->p1name); fprintf(fd, SET "[%s]:Configuration=phase2-%s force\n", r->p2name, r->p2name); fprintf(fd, SET "[%s]:Local-ID=%s force\n", r->p2name, r->p2lid); fprintf(fd, SET "[%s]:Remote-ID=%s force\n", r->p2name, r->p2rid); if (r->tag) fprintf(fd, SET "[%s]:PF-Tag=%s force\n", r->p2name, r->tag); } static int ike_section_p2(struct ipsec_rule *r, FILE *fd) { char *exchange_type, *sprefix; switch (r->p2ie) { case IKE_QM: exchange_type = "QUICK_MODE"; sprefix = "QM"; break; default: warnx("illegal phase 2 ike mode %d", r->p2ie); return (-1); } fprintf(fd, SET "[phase2-%s]:EXCHANGE_TYPE=%s force\n", r->p2name, exchange_type); fprintf(fd, SET "[phase2-%s]:Suites=%s-", r->p2name, sprefix); switch (r->satype) { case IPSEC_ESP: fprintf(fd, "ESP"); break; case IPSEC_AH: fprintf(fd, "AH"); break; default: warnx("illegal satype %d", r->satype); return (-1); } fprintf(fd, "-"); switch (r->tmode) { case IPSEC_TUNNEL: break; case IPSEC_TRANSPORT: fprintf(fd, "TRP-"); break; default: warnx("illegal encapsulation mode %d", r->tmode); return (-1); } if (r->p2xfs && r->p2xfs->encxf) { if (r->satype == IPSEC_ESP) { switch (r->p2xfs->encxf->id) { case ENCXF_3DES_CBC: fprintf(fd, "3DES"); break; case ENCXF_DES_CBC: fprintf(fd, "DES"); break; case ENCXF_AES: fprintf(fd, "AES"); break; case ENCXF_AES_128: fprintf(fd, "AES-128"); break; case ENCXF_AES_192: fprintf(fd, "AES-192"); break; case ENCXF_AES_256: fprintf(fd, "AES-256"); break; case ENCXF_AESCTR: fprintf(fd, "AESCTR"); break; case ENCXF_BLOWFISH: fprintf(fd, "BLF"); break; case ENCXF_CAST128: fprintf(fd, "CAST"); break; case ENCXF_NULL: fprintf(fd, "NULL"); break; default: warnx("illegal transform %s", r->p2xfs->encxf->name); return (-1); } fprintf(fd, "-"); } else { warnx("illegal transform %s", r->p2xfs->encxf->name); return (-1); } } else if (r->satype == IPSEC_ESP) fprintf(fd, "AES-"); if (r->p2xfs && r->p2xfs->authxf) { switch (r->p2xfs->authxf->id) { case AUTHXF_HMAC_MD5: fprintf(fd, "MD5"); break; case AUTHXF_HMAC_SHA1: fprintf(fd, "SHA"); break; case AUTHXF_HMAC_RIPEMD160: fprintf(fd, "RIPEMD"); break; case AUTHXF_HMAC_SHA2_256: fprintf(fd, "SHA2-256"); break; case AUTHXF_HMAC_SHA2_384: fprintf(fd, "SHA2-384"); break; case AUTHXF_HMAC_SHA2_512: fprintf(fd, "SHA2-512"); break; default: warnx("illegal transform %s", r->p2xfs->authxf->name); return (-1); } } else fprintf(fd, "SHA2-256"); if (r->p2xfs && r->p2xfs->groupxf) { switch (r->p2xfs->groupxf->id) { case GROUPXF_NONE: break; case GROUPXF_768: fprintf(fd, "-PFS-GRP1"); break; case GROUPXF_1024: fprintf(fd, "-PFS-GRP2"); break; case GROUPXF_1536: fprintf(fd, "-PFS-GRP5"); break; case GROUPXF_2048: fprintf(fd, "-PFS-GRP14"); break; case GROUPXF_3072: fprintf(fd, "-PFS-GRP15"); break; case GROUPXF_4096: fprintf(fd, "-PFS-GRP16"); break; case GROUPXF_6144: fprintf(fd, "-PFS-GRP17"); break; case GROUPXF_8192: fprintf(fd, "-PFS-GRP18"); break; default: warnx("illegal group %s", r->p2xfs->groupxf->name); return (-1); }; } else fprintf(fd, "-PFS"); fprintf(fd, "-SUITE force\n"); return (0); } static int ike_section_p1(struct ipsec_rule *r, FILE *fd) { char *exchange_type; switch (r->p1ie) { case IKE_MM: exchange_type = "ID_PROT"; break; case IKE_AM: exchange_type = "AGGRESSIVE"; break; default: warnx("illegal phase 2 ike mode %d", r->p1ie); return (-1); } fprintf(fd, SET "[%s]:Configuration=phase1-%s force\n", r->p1name, r->p1name); fprintf(fd, SET "[phase1-%s]:EXCHANGE_TYPE=%s force\n", r->p1name, exchange_type); fprintf(fd, ADD "[phase1-%s]:Transforms=", r->p1name); if (r->p1xfs && r->p1xfs->encxf) { switch (r->p1xfs->encxf->id) { case ENCXF_3DES_CBC: fprintf(fd, "3DES"); break; case ENCXF_DES_CBC: fprintf(fd, "DES"); break; case ENCXF_AES: fprintf(fd, "AES"); break; case ENCXF_AES_128: fprintf(fd, "AES-128"); break; case ENCXF_AES_192: fprintf(fd, "AES-192"); break; case ENCXF_AES_256: fprintf(fd, "AES-256"); break; case ENCXF_BLOWFISH: fprintf(fd, "BLF"); break; case ENCXF_CAST128: fprintf(fd, "CAST"); break; default: warnx("illegal transform %s", r->p1xfs->encxf->name); return (-1); } } else fprintf(fd, "AES"); fprintf(fd, "-"); if (r->p1xfs && r->p1xfs->authxf) { switch (r->p1xfs->authxf->id) { case AUTHXF_HMAC_MD5: fprintf(fd, "MD5"); break; case AUTHXF_HMAC_SHA1: fprintf(fd, "SHA"); break; case AUTHXF_HMAC_SHA2_256: fprintf(fd, "SHA2-256"); break; case AUTHXF_HMAC_SHA2_384: fprintf(fd, "SHA2-384"); break; case AUTHXF_HMAC_SHA2_512: fprintf(fd, "SHA2-512"); break; default: warnx("illegal transform %s", r->p1xfs->authxf->name); return (-1); } } else fprintf(fd, "SHA"); if (r->p1xfs && r->p1xfs->groupxf) { switch (r->p1xfs->groupxf->id) { case GROUPXF_768: fprintf(fd, "-GRP1"); break; case GROUPXF_1024: fprintf(fd, "-GRP2"); break; case GROUPXF_1536: fprintf(fd, "-GRP5"); break; case GROUPXF_2048: fprintf(fd, "-GRP14"); break; case GROUPXF_3072: fprintf(fd, "-GRP15"); break; case GROUPXF_4096: fprintf(fd, "-GRP16"); break; case GROUPXF_6144: fprintf(fd, "-GRP17"); break; case GROUPXF_8192: fprintf(fd, "-GRP18"); break; default: warnx("illegal group %s", r->p1xfs->groupxf->name); return (-1); }; } if (r->ikeauth->type == IKE_AUTH_RSA) fprintf(fd, "-RSA_SIG"); fprintf(fd, " force\n"); return (0); } static void ike_section_p2ids(struct ipsec_rule *r, FILE *fd) { char mask[NI_MAXHOST], *network, *p; struct sockaddr_storage sas; struct sockaddr *sa = (struct sockaddr *)&sas; struct ipsec_addr_wrap *src = r->src; struct ipsec_addr_wrap *dst = r->dst; if (src->netaddress) { bzero(&sas, sizeof(struct sockaddr_storage)); bzero(mask, sizeof(mask)); sa->sa_family = src->af; switch (src->af) { case AF_INET: sa->sa_len = sizeof(struct sockaddr_in); bcopy(&src->mask.ipa, &((struct sockaddr_in *)(sa))->sin_addr, sizeof(struct in6_addr)); break; case AF_INET6: sa->sa_len = sizeof(struct sockaddr_in6); bcopy(&src->mask.ipa, &((struct sockaddr_in6 *)sa)->sin6_addr, sizeof(struct in6_addr)); break; } if (getnameinfo(sa, sa->sa_len, mask, sizeof(mask), NULL, 0, NI_NUMERICHOST)) errx(1, "could not get a numeric mask"); if ((network = strdup(src->name)) == NULL) err(1, "ike_section_p2ids: strdup"); if ((p = strrchr(network, '/')) != NULL) *p = '\0'; fprintf(fd, SET "[%s]:ID-type=IPV%d_ADDR_SUBNET force\n", r->p2lid, ((src->af == AF_INET) ? 4 : 6)); fprintf(fd, SET "[%s]:Network=%s force\n", r->p2lid, network); fprintf(fd, SET "[%s]:Netmask=%s force\n", r->p2lid, mask); free(network); } else { fprintf(fd, SET "[%s]:ID-type=IPV%d_ADDR force\n", r->p2lid, ((src->af == AF_INET) ? 4 : 6)); if ((p = strrchr(src->name, '/')) != NULL) *p = '\0'; fprintf(fd, SET "[%s]:Address=%s force\n", r->p2lid, src->name); } if (dst->netaddress) { bzero(&sas, sizeof(struct sockaddr_storage)); bzero(mask, sizeof(mask)); sa->sa_family = dst->af; switch (dst->af) { case AF_INET: sa->sa_len = sizeof(struct sockaddr_in); bcopy(&dst->mask.ipa, &((struct sockaddr_in *)(sa))->sin_addr, sizeof(struct in6_addr)); break; case AF_INET6: sa->sa_len = sizeof(struct sockaddr_in6); bcopy(&dst->mask.ipa, &((struct sockaddr_in6 *)(sa))->sin6_addr, sizeof(struct in6_addr)); break; } if (getnameinfo(sa, sa->sa_len, mask, sizeof(mask), NULL, 0, NI_NUMERICHOST)) errx(1, "could not get a numeric mask"); if ((network = strdup(dst->name)) == NULL) err(1, "ike_section_p2ids: strdup"); if ((p = strrchr(network, '/')) != NULL) *p = '\0'; fprintf(fd, SET "[%s]:ID-type=IPV%d_ADDR_SUBNET force\n", r->p2rid, ((dst->af == AF_INET) ? 4 : 6)); fprintf(fd, SET "[%s]:Network=%s force\n", r->p2rid, network); fprintf(fd, SET "[%s]:Netmask=%s force\n", r->p2rid, mask); free(network); } else { fprintf(fd, SET "[%s]:ID-type=IPV%d_ADDR force\n", r->p2rid, ((dst->af == AF_INET) ? 4 : 6)); if ((p = strrchr(dst->name, '/')) != NULL) *p = '\0'; fprintf(fd, SET "[%s]:Address=%s force\n", r->p2rid, dst->name); } if (r->proto) { fprintf(fd, SET "[%s]:Protocol=%d force\n", r->p2lid, r->proto); fprintf(fd, SET "[%s]:Protocol=%d force\n", r->p2rid, r->proto); } if (r->sport) fprintf(fd, SET "[%s]:Port=%d force\n", r->p2lid, ntohs(r->sport)); if (r->dport) fprintf(fd, SET "[%s]:Port=%d force\n", r->p2rid, ntohs(r->dport)); } static int ike_connect(struct ipsec_rule *r, FILE *fd) { switch (r->ikemode) { case IKE_ACTIVE: case IKE_DYNAMIC: fprintf(fd, ADD "[Phase 2]:Connections=%s\n", r->p2name); break; case IKE_PASSIVE: fprintf(fd, ADD "[Phase 2]:Passive-Connections=%s\n", r->p2name); break; default: return (-1); } return (0); } static int ike_gen_config(struct ipsec_rule *r, FILE *fd) { ike_setup_ids(r); ike_section_general(r, fd); ike_section_peer(r, fd); if (ike_section_p1(r, fd) == -1) { return (-1); } ike_section_ids(r, fd); ike_section_ipsec(r, fd); if (ike_section_p2(r, fd) == -1) { return (-1); } ike_section_p2ids(r, fd); if (ike_connect(r, fd) == -1) return (-1); return (0); } static int ike_delete_config(struct ipsec_rule *r, FILE *fd) { ike_setup_ids(r); #if 0 switch (r->ikemode) { case IKE_ACTIVE: case IKE_DYNAMIC: fprintf(fd, "t %s\n", r->p2name); break; case IKE_PASSIVE: fprintf(fd, DELETE "[Phase 2]\n"); fprintf(fd, "t %s\n", r->p2name); break; default: return (-1); } if (r->peer) { fprintf(fd, DELETE "[%s]\n", r->p1name); fprintf(fd, DELETE "[phase1-%s]\n", r->p1name); } if (r->auth) { if (r->auth->srcid) fprintf(fd, DELETE "[%s-ID]\n", r->auth->srcid); if (r->auth->dstid) fprintf(fd, DELETE "[%s-ID]\n", r->auth->dstid); } fprintf(fd, DELETE "[%s]\n", r->p2name); fprintf(fd, DELETE "[phase2-%s]\n", r->p2name); fprintf(fd, DELETE "[%s]\n", r->p2lid); fprintf(fd, DELETE "[%s]\n", r->p2rid); #else fprintf(fd, "t %s\n", r->p2name); switch (r->ikemode) { case IKE_ACTIVE: case IKE_DYNAMIC: fprintf(fd, RMV "[Phase 2]:Connections=%s\n", r->p2name); break; case IKE_PASSIVE: fprintf(fd, RMV "[Phase 2]:Passive-Connections=%s\n", r->p2name); break; default: return (-1); } fprintf(fd, DELETE "[%s]\n", r->p2name); fprintf(fd, DELETE "[phase2-%s]\n", r->p2name); #endif return (0); } static void ike_setup_ids(struct ipsec_rule *r) { char sproto[10], ssport[10], sdport[10]; /* phase 1 name is peer and local address */ if (r->peer) { if (r->local) { /* peer-dstaddr-local-srcaddr */ if (asprintf(&r->p1name, "peer-%s-local-%s", r->peer->name, r->local->name) == -1) err(1, "ike_setup_ids"); } else /* peer-dstaddr */ if (asprintf(&r->p1name, "peer-%s", r->peer->name) == -1) err(1, "ike_setup_ids"); } else if ((r->p1name = strdup("peer-default")) == NULL) err(1, "ike_setup_ids"); /* Phase 2 name is from and to network, protocol, port*/ sproto[0] = ssport[0] = sdport[0] = 0; if (r->proto) snprintf(sproto, sizeof sproto, "=%u", r->proto); if (r->sport) snprintf(ssport, sizeof ssport, ":%u", ntohs(r->sport)); if (r->dport) snprintf(sdport, sizeof sdport, ":%u", ntohs(r->dport)); /* from-network/masklen=proto:port */ if (asprintf(&r->p2lid, "from-%s%s%s", r->src->name, sproto, ssport) == -1) err(1, "ike_setup_ids"); /* to-network/masklen=proto:port */ if (asprintf(&r->p2rid, "to-%s%s%s", r->dst->name, sproto, sdport) == -1) err(1, "ike_setup_ids"); /* from-network/masklen=proto:port-to-network/masklen=proto:port */ if (asprintf(&r->p2name, "%s-%s", r->p2lid , r->p2rid) == -1) err(1, "ike_setup_ids"); } int ike_print_config(struct ipsec_rule *r, int opts) { if (opts & IPSECCTL_OPT_DELETE) return (ike_delete_config(r, stdout)); else return (ike_gen_config(r, stdout)); } int ike_ipsec_establish(int action, struct ipsec_rule *r) { struct stat sb; FILE *fdp; int fd, ret = 0; if ((fd = open(ISAKMPD_FIFO, O_WRONLY)) == -1) err(1, "ike_ipsec_establish: open(%s)", ISAKMPD_FIFO); if (fstat(fd, &sb) == -1) err(1, "ike_ipsec_establish: fstat(%s)", ISAKMPD_FIFO); if (!S_ISFIFO(sb.st_mode)) errx(1, "ike_ipsec_establish: %s not a fifo", ISAKMPD_FIFO); if ((fdp = fdopen(fd, "w")) == NULL) err(1, "ike_ipsec_establish: fdopen(%s)", ISAKMPD_FIFO); switch (action) { case ACTION_ADD: ret = ike_gen_config(r, fdp); break; case ACTION_DELETE: ret = ike_delete_config(r, fdp); break; default: ret = -1; } fclose(fdp); return (ret); }