X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fikev2%2Fikev2.c;h=fa653760b1d4ec538326187e15d16b8a1aefcc5e;hb=af2cc6425;hp=59a01f32fc0a9bdf861f3b4c09a44cc094f10d8d;hpb=42bbb3f68552b297ce6c6ac52da1b7e7ad77c997;p=vpp.git diff --git a/src/plugins/ikev2/ikev2.c b/src/plugins/ikev2/ikev2.c index 59a01f32fc0..fa653760b1d 100644 --- a/src/plugins/ikev2/ikev2.c +++ b/src/plugins/ikev2/ikev2.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -1621,33 +1622,16 @@ ikev2_sa_match_ts (ikev2_sa_t * sa) } } -static void -ikev2_sa_auth (ikev2_sa_t * sa) +static ikev2_profile_t * +ikev2_select_profile (ikev2_main_t *km, ikev2_sa_t *sa, + ikev2_sa_transform_t *tr_prf, u8 *key_pad) { - ikev2_main_t *km = &ikev2_main; - ikev2_profile_t *p, *sel_p = 0; - u8 *authmsg, *key_pad, *psk = 0, *auth = 0; - ikev2_sa_transform_t *tr_prf; - - tr_prf = - ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF); - - /* only shared key and rsa signature */ - if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC || - sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)) - { - ikev2_elog_uint (IKEV2_LOG_ERROR, - "unsupported authentication method %u", - sa->i_auth.method); - ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED); - return; - } - - key_pad = format (0, "%s", IKEV2_KEY_PAD); - authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator); - + ikev2_profile_t *ret = 0, *p; ikev2_id_t *id_rem, *id_loc; ikev2_auth_t *sa_auth; + u8 *authmsg, *psk = 0, *auth = 0; + + authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator); if (sa->is_initiator) { @@ -1662,68 +1646,87 @@ ikev2_sa_auth (ikev2_sa_t * sa) sa_auth = &sa->i_auth; } - /* *INDENT-OFF* */ - pool_foreach (p, km->profiles) { + pool_foreach (p, km->profiles) + { + /* check id */ + if (!ikev2_is_id_equal (&p->rem_id, id_rem) || + !ikev2_is_id_equal (&p->loc_id, id_loc)) + continue; - /* check id */ - if (!ikev2_is_id_equal (&p->rem_id, id_rem) - || !ikev2_is_id_equal (&p->loc_id, id_loc)) - continue; + if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) + { + if (!p->auth.data || + p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC) + continue; - if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) - { - if (!p->auth.data || - p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC) - continue; + psk = ikev2_calc_prf (tr_prf, p->auth.data, key_pad); + auth = ikev2_calc_prf (tr_prf, psk, authmsg); - psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad); - auth = ikev2_calc_prf(tr_prf, psk, authmsg); + if (!clib_memcmp (auth, sa_auth->data, vec_len (sa_auth->data))) + { + ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED); + vec_free (auth); + ret = p; + break; + } + else + { + ikev2_elog_uint (IKEV2_LOG_ERROR, + "shared key mismatch! ispi %lx", sa->ispi); + } + } + else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG) + { + if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG) + continue; - if (!clib_memcmp(auth, sa_auth->data, vec_len(sa_auth->data))) - { - ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED); - vec_free(auth); - sel_p = p; - break; - } - else - { - ikev2_elog_uint (IKEV2_LOG_ERROR, "shared key mismatch! ispi %lx", - sa->ispi); - } - } - else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG) - { - if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG) - continue; + if (ikev2_verify_sign (p->auth.key, sa_auth->data, authmsg) == 1) + { + ikev2_set_state (sa, IKEV2_STATE_AUTHENTICATED); + ret = p; + break; + } + else + { + ikev2_elog_uint (IKEV2_LOG_ERROR, + "cert verification failed! ispi %lx", sa->ispi); + } + } + } + vec_free (authmsg); + return ret; +} - if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1) - { - ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED); - sel_p = p; - break; - } - else - { - ikev2_elog_uint (IKEV2_LOG_ERROR, - "cert verification failed! ispi %lx", sa->ispi); - } - } +static void +ikev2_sa_auth (ikev2_sa_t *sa) +{ + ikev2_main_t *km = &ikev2_main; + ikev2_profile_t *sel_p = 0; + ikev2_sa_transform_t *tr_prf; + u8 *psk, *authmsg, *key_pad; - vec_free(auth); - vec_free(psk); - } - /* *INDENT-ON* */ + tr_prf = + ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF); + + /* only shared key and rsa signature */ + if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC || + sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)) + { + ikev2_elog_uint (IKEV2_LOG_ERROR, "unsupported authentication method %u", + sa->i_auth.method); + ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED); + return; + } + + key_pad = format (0, "%s", IKEV2_KEY_PAD); + sel_p = ikev2_select_profile (km, sa, tr_prf, key_pad); if (sel_p) { + ASSERT (sa->state == IKEV2_STATE_AUTHENTICATED); sa->udp_encap = sel_p->udp_encap; sa->ipsec_over_udp_port = sel_p->ipsec_over_udp_port; - } - vec_free (authmsg); - if (sa->state == IKEV2_STATE_AUTHENTICATED) - { if (!sa->is_initiator) { vec_free (sa->r_id.data); @@ -1737,8 +1740,10 @@ ikev2_sa_auth (ikev2_sa_t * sa) if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) { vec_free (sa->r_auth.data); + psk = ikev2_calc_prf (tr_prf, sel_p->auth.data, key_pad); sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg); sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC; + vec_free (psk); } else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG) { @@ -1767,11 +1772,9 @@ ikev2_sa_auth (ikev2_sa_t * sa) "profile found! ispi %lx", sa->ispi); ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED); } - vec_free (psk); vec_free (key_pad); } - static void ikev2_sa_auth_init (ikev2_sa_t * sa) { @@ -1793,15 +1796,17 @@ ikev2_sa_auth_init (ikev2_sa_t * sa) return; } - key_pad = format (0, "%s", IKEV2_KEY_PAD); authmsg = ikev2_sa_generate_authmsg (sa, 0); - psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad); if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) { + key_pad = format (0, "%s", IKEV2_KEY_PAD); + psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad); vec_free (sa->i_auth.data); sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg); sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC; + vec_free (psk); + vec_free (key_pad); } else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG) { @@ -1809,9 +1814,6 @@ ikev2_sa_auth_init (ikev2_sa_t * sa) sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg); sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG; } - - vec_free (psk); - vec_free (key_pad); vec_free (authmsg); } @@ -2731,7 +2733,7 @@ ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike) u32 msg_id = clib_net_to_host_u32 (ike->msgid); /* new req */ - if (msg_id > sa->last_msg_id) + if (msg_id > sa->last_msg_id || sa->last_msg_id == ~0) { sa->last_msg_id = msg_id; return 0; @@ -2891,6 +2893,9 @@ ikev2_node_internal (vlib_main_t *vm, vlib_node_runtime_t *node, ikev2_stats_t _stats, *stats = &_stats; int res; + /* no NAT traversal for ip6 */ + ASSERT (!natt || is_ip4); + clib_memset_u16 (stats, 0, sizeof (stats[0]) / sizeof (u16)); from = vlib_frame_vector_args (frame); vlib_get_buffers (vm, from, bufs, n_left); @@ -3142,6 +3147,7 @@ ikev2_node_internal (vlib_main_t *vm, vlib_node_runtime_t *node, if (sa0->is_initiator) { + sa0->last_msg_id = ~0; ikev2_del_sa_init (sa0->ispi); } else @@ -3149,7 +3155,6 @@ ikev2_node_internal (vlib_main_t *vm, vlib_node_runtime_t *node, sa0->stats.n_sa_auth_req++; stats->n_sa_auth_req++; ike0->flags = IKEV2_HDR_FLAG_RESPONSE; - sa0->last_init_msg_id = 1; slen = ikev2_generate_message (b0, sa0, ike0, 0, udp0, stats); if (~0 == slen) @@ -3719,27 +3724,7 @@ ikev2_set_local_key (vlib_main_t * vm, u8 * file) static_always_inline vnet_api_error_t ikev2_register_udp_port (ikev2_profile_t * p, u16 port) { - ikev2_main_t *km = &ikev2_main; - udp_dst_port_info_t *pi; - - uword *v = hash_get (km->udp_ports, port); - pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4); - - if (v) - { - /* IKE already uses this port, only increment reference counter */ - ASSERT (pi); - v[0]++; - } - else - { - if (pi) - return VNET_API_ERROR_UDP_PORT_TAKEN; - - udp_register_dst_port (km->vlib_main, port, - ipsec4_tun_input_node.index, 1); - hash_set (km->udp_ports, port, 1); - } + ipsec_register_udp_port (port); p->ipsec_over_udp_port = port; return 0; } @@ -3747,24 +3732,10 @@ ikev2_register_udp_port (ikev2_profile_t * p, u16 port) static_always_inline void ikev2_unregister_udp_port (ikev2_profile_t * p) { - ikev2_main_t *km = &ikev2_main; - uword *v; - if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE) return; - v = hash_get (km->udp_ports, p->ipsec_over_udp_port); - if (!v) - return; - - v[0]--; - - if (v[0] == 0) - { - udp_unregister_dst_port (km->vlib_main, p->ipsec_over_udp_port, 1); - hash_unset (km->udp_ports, p->ipsec_over_udp_port); - } - + ipsec_unregister_udp_port (p->ipsec_over_udp_port); p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE; } @@ -3886,6 +3857,12 @@ ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p) vec_free (del_sai); } +static void +ikev2_profile_responder_free (ikev2_responder_t *r) +{ + vec_free (r->hostname); +} + static void ikev2_profile_free (ikev2_profile_t * p) { @@ -3895,6 +3872,8 @@ ikev2_profile_free (ikev2_profile_t * p) if (p->auth.key) EVP_PKEY_free (p->auth.key); + ikev2_profile_responder_free (&p->responder); + vec_free (p->loc_id.data); vec_free (p->rem_id.data); } @@ -4072,6 +4051,27 @@ ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id, return 0; } +clib_error_t * +ikev2_set_profile_responder_hostname (vlib_main_t *vm, u8 *name, u8 *hostname, + u32 sw_if_index) +{ + ikev2_profile_t *p; + clib_error_t *r; + + p = ikev2_profile_index_by_name (name); + + if (!p) + { + r = clib_error_return (0, "unknown profile %v", name); + return r; + } + + p->responder.is_resolved = 0; + p->responder.sw_if_index = sw_if_index; + p->responder.hostname = vec_dup (hostname); + + return 0; +} clib_error_t * ikev2_set_profile_responder (vlib_main_t * vm, u8 * name, @@ -4088,6 +4088,7 @@ ikev2_set_profile_responder (vlib_main_t * vm, u8 * name, return r; } + p->responder.is_resolved = 1; p->responder.sw_if_index = sw_if_index; ip_address_copy (&p->responder.addr, &addr); @@ -4167,9 +4168,7 @@ ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port, u8 is_set) { ikev2_profile_t *p = ikev2_profile_index_by_name (name); - ikev2_main_t *km = &ikev2_main; vnet_api_error_t rv = 0; - uword *v; if (!p) return VNET_API_ERROR_INVALID_VALUE; @@ -4183,10 +4182,6 @@ ikev2_set_profile_ipsec_udp_port (vlib_main_t * vm, u8 * name, u16 port, } else { - v = hash_get (km->udp_ports, port); - if (!v) - return VNET_API_ERROR_IKE_NO_PORT; - if (p->ipsec_over_udp_port == IPSEC_UDP_PORT_NONE) return VNET_API_ERROR_INVALID_VALUE; @@ -4262,6 +4257,31 @@ ikev2_get_if_address (u32 sw_if_index, ip_address_family_t af, return 0; } +static clib_error_t * +ikev2_resolve_responder_hostname (vlib_main_t *vm, ikev2_responder_t *r) +{ + ikev2_main_t *km = &ikev2_main; + dns_cache_entry_t *ep = 0; + dns_pending_request_t _t0, *t0 = &_t0; + dns_resolve_name_t _rn, *rn = &_rn; + int rv; + + if (!km->dns_resolve_name) + return clib_error_return (0, "cannot load symbols from dns plugin"); + + t0->request_type = DNS_API_PENDING_NAME_TO_IP; + rv = km->dns_resolve_name (r->hostname, &ep, t0, rn); + if (rv < 0) + return clib_error_return (0, "dns lookup failure"); + + if (ep == 0) + return 0; + + ip_address_copy (&r->addr, &rn->address); + r->is_resolved = 1; + return 0; +} + clib_error_t * ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) { @@ -4272,7 +4292,7 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) ike_header_t *ike0; u32 bi0 = 0; int len = sizeof (ike_header_t), valid_ip = 0; - ip_address_t if_ip = ip_address_initializer; + ip_address_t src_if_ip = ip_address_initializer; p = ikev2_profile_index_by_name (name); @@ -4282,15 +4302,26 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) return r; } - if (p->responder.sw_if_index == ~0 - || ip_address_is_zero (&p->responder.addr)) + if (p->responder.sw_if_index == ~0 || + (ip_address_is_zero (&p->responder.addr) && + vec_len (p->responder.hostname) == 0)) { r = clib_error_return (0, "responder not set for profile %v", name); return r; } - if (ikev2_get_if_address (p->responder.sw_if_index, - ip_addr_version (&p->responder.addr), &if_ip)) + if (!p->responder.is_resolved) + { + /* try to resolve using dns plugin + * success does not mean we have resolved the name */ + r = ikev2_resolve_responder_hostname (vm, &p->responder); + if (r) + return r; + } + + if (p->responder.is_resolved && + ikev2_get_if_address (p->responder.sw_if_index, + ip_addr_version (&p->responder.addr), &src_if_ip)) { valid_ip = 1; } @@ -4344,10 +4375,9 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) sizeof (sa.childs[0].i_proposals[0].spi)); /* Add NAT detection notification messages (mandatory) */ - u8 *nat_detection_sha1 = - ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi), - clib_host_to_net_u64 (sa.rspi), - &if_ip, clib_host_to_net_u16 (IKEV2_PORT)); + u8 *nat_detection_sha1 = ikev2_compute_nat_sha1 ( + clib_host_to_net_u64 (sa.ispi), clib_host_to_net_u64 (sa.rspi), &src_if_ip, + clib_host_to_net_u16 (IKEV2_PORT)); ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP, nat_detection_sha1); @@ -4401,7 +4431,7 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) vec_add (sa.last_sa_init_req_packet_data, ike0, len); /* add data to the SA then add it to the pool */ - ip_address_copy (&sa.iaddr, &if_ip); + ip_address_copy (&sa.iaddr, &src_if_ip); ip_address_copy (&sa.raddr, &p->responder.addr); sa.i_id.type = p->loc_id.type; sa.i_id.data = vec_dup (p->loc_id.data); @@ -4424,8 +4454,8 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) if (valid_ip) { - ikev2_send_ike (vm, &if_ip, &p->responder.addr, bi0, len, - IKEV2_PORT, sa.dst_port, sa.sw_if_index); + ikev2_send_ike (vm, &src_if_ip, &p->responder.addr, bi0, len, IKEV2_PORT, + sa.dst_port, sa.sw_if_index); ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to ", @@ -4433,14 +4463,6 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) ip_addr_v4 (&p->responder.addr).as_u32, ip_addr_version (&p->responder.addr) == AF_IP4); } - else - { - r = - clib_error_return (0, "interface %U does not have any IP address!", - format_vnet_sw_if_index_name, vnet_get_main (), - p->responder.sw_if_index); - return r; - } return 0; } @@ -4757,7 +4779,6 @@ ikev2_init (vlib_main_t * vm) km->sa_by_ispi = hash_create (0, sizeof (uword)); km->sw_if_indices = hash_create (0, 0); - km->udp_ports = hash_create (0, sizeof (uword)); udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip4.index, 1); udp_register_dst_port (vm, IKEV2_PORT, ikev2_node_ip6.index, 0); @@ -4769,15 +4790,19 @@ ikev2_init (vlib_main_t * vm) "ikev2-ip4-natt"); ikev2_cli_reference (); + km->dns_resolve_name = + vlib_get_plugin_symbol ("dns_plugin.so", "dns_resolve_name"); + if (!km->dns_resolve_name) + ikev2_log_error ("cannot load symbols from dns plugin"); + km->log_level = IKEV2_LOG_ERROR; km->log_class = vlib_log_register_class ("ikev2", 0); return 0; } /* *INDENT-OFF* */ -VLIB_INIT_FUNCTION (ikev2_init) = -{ - .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"), +VLIB_INIT_FUNCTION (ikev2_init) = { + .runs_after = VLIB_INITS ("ipsec_init", "ipsec_punt_init", "dns_init"), }; /* *INDENT-ON* */ @@ -4965,15 +4990,44 @@ ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa) } static void -ikev2_process_pending_sa_init_one (ikev2_main_t * km, ikev2_sa_t * sa) +ikev2_process_pending_sa_init_one (vlib_main_t *vm, ikev2_main_t *km, + ikev2_sa_t *sa) { ikev2_profile_t *p; u32 bi0; u8 *nat_sha, *np; + p = pool_elt_at_index (km->profiles, sa->profile_index); + + if (!p->responder.is_resolved) + { + clib_error_t *r = ikev2_resolve_responder_hostname (vm, &p->responder); + if (r) + { + clib_error_free (r); + return; + } + + if (!p->responder.is_resolved) + return; + + ip_address_copy (&sa->raddr, &p->responder.addr); + + /* update nat detection destination hash */ + np = ikev2_find_ike_notify_payload ( + (ike_header_t *) sa->last_sa_init_req_packet_data, + IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP); + if (np) + { + nat_sha = ikev2_compute_nat_sha1 ( + clib_host_to_net_u64 (sa->ispi), clib_host_to_net_u64 (sa->rspi), + &sa->raddr, clib_host_to_net_u16 (sa->dst_port)); + clib_memcpy_fast (np, nat_sha, vec_len (nat_sha)); + vec_free (nat_sha); + } + } if (ip_address_is_zero (&sa->iaddr)) { - p = pool_elt_at_index (km->profiles, sa->profile_index); if (!ikev2_get_if_address (p->responder.sw_if_index, ip_addr_version (&p->responder.addr), &sa->iaddr)) @@ -5010,7 +5064,7 @@ ikev2_process_pending_sa_init_one (ikev2_main_t * km, ikev2_sa_t * sa) } static void -ikev2_process_pending_sa_init (ikev2_main_t * km) +ikev2_process_pending_sa_init (vlib_main_t *vm, ikev2_main_t *km) { u32 sai; u64 ispi; @@ -5023,7 +5077,7 @@ ikev2_process_pending_sa_init (ikev2_main_t * km) if (sa->init_response_received) continue; - ikev2_process_pending_sa_init_one (km, sa); + ikev2_process_pending_sa_init_one (vm, km, sa); })); /* *INDENT-ON* */ } @@ -5111,7 +5165,6 @@ ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { ikev2_main_t *km = &ikev2_main; - ipsec_main_t *im = &ipsec_main; ikev2_profile_t *p; ikev2_child_sa_t *c; u32 *sai; @@ -5185,12 +5238,13 @@ ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt, /* process ipsec sas */ ipsec_sa_t *sa; /* *INDENT-OFF* */ - pool_foreach (sa, im->sad) { - ikev2_mngr_process_ipsec_sa(sa); - } + pool_foreach (sa, ipsec_sa_pool) + { + ikev2_mngr_process_ipsec_sa (sa); + } /* *INDENT-ON* */ - ikev2_process_pending_sa_init (km); + ikev2_process_pending_sa_init (vm, km); } return 0; }