X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fikev2%2Fikev2.c;h=0842125ca70a57bfe54aa31ce2c83dfed70b553c;hb=459d17bb7;hp=b6202aeec6a23a0657861b3d76243f5fe776eb44;hpb=595d6f8b7cadfcd7b0a7c3a28b787c476dbebaba;p=vpp.git diff --git a/src/plugins/ikev2/ikev2.c b/src/plugins/ikev2/ikev2.c index b6202aeec6a..0842125ca70 100644 --- a/src/plugins/ikev2/ikev2.c +++ b/src/plugins/ikev2/ikev2.c @@ -28,6 +28,10 @@ #include #include #include +#include + +#define IKEV2_LIVENESS_RETRIES 3 +#define IKEV2_LIVENESS_PERIOD_CHECK 30 ikev2_main_t ikev2_main; @@ -37,7 +41,7 @@ static int ikev2_delete_tunnel_interface (vnet_main_t * vnm, #define ikev2_set_state(sa, v) do { \ (sa)->state = v; \ - clib_warning("sa state changed to " #v); \ + ikev2_elog_sa_state("ispi %lx SA state changed to " #v, sa->ispi); \ } while(0); typedef struct @@ -89,6 +93,22 @@ typedef enum IKEV2_N_NEXT, } ikev2_next_t; +typedef u32 ikev2_non_esp_marker; + +static_always_inline u16 +ikev2_get_port (ikev2_sa_t * sa) +{ + return sa->natt ? IKEV2_PORT_NATT : IKEV2_PORT; +} + +static_always_inline int +ikev2_insert_non_esp_marker (ike_header_t * ike, int len) +{ + memmove ((u8 *) ike + sizeof (ikev2_non_esp_marker), ike, len); + clib_memset (ike, 0, sizeof (ikev2_non_esp_marker)); + return len + sizeof (ikev2_non_esp_marker); +} + static ikev2_sa_transform_t * ikev2_find_transform_data (ikev2_sa_transform_t * t) { @@ -129,9 +149,8 @@ ikev2_select_proposal (ikev2_sa_proposal_t * proposals, if (prot_id == IKEV2_PROTOCOL_IKE) { mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) | - (1 << IKEV2_TRANSFORM_TYPE_PRF) | - (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH); - optional_bitmap = mandatory_bitmap; + (1 << IKEV2_TRANSFORM_TYPE_PRF) | (1 << IKEV2_TRANSFORM_TYPE_DH); + optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_INTEG); } else if (prot_id == IKEV2_PROTOCOL_ESP) { @@ -171,9 +190,6 @@ ikev2_select_proposal (ikev2_sa_proposal_t * proposals, } } - clib_warning ("bitmap is %x mandatory is %x optional is %x", - bitmap, mandatory_bitmap, optional_bitmap); - if ((bitmap & mandatory_bitmap) == mandatory_bitmap && (bitmap & ~optional_bitmap) == 0) { @@ -346,8 +362,6 @@ ikev2_generate_sa_init_data (ikev2_sa_t * sa) if (!t) { - clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group, - vec_len (sa->i_dh_data)); sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE; return; } @@ -382,7 +396,6 @@ ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai) ikev2_sa_transform_t *t = 0, *t2; ikev2_main_t *km = &ikev2_main; - /*move some data to the new SA */ #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;}) sa->i_nonce = _(sai->i_nonce); @@ -392,15 +405,22 @@ ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai) sa->raddr.as_u32 = sai->raddr.as_u32; sa->is_initiator = sai->is_initiator; sa->i_id.type = sai->i_id.type; + sa->r_id.type = sai->r_id.type; sa->profile_index = sai->profile_index; - sa->is_profile_index_set = sai->is_profile_index_set; + sa->tun_itf = sai->tun_itf; + sa->is_tun_itf_set = sai->is_tun_itf_set; sa->i_id.data = _(sai->i_id.data); + sa->r_id.data = _(sai->r_id.data); sa->i_auth.method = sai->i_auth.method; sa->i_auth.hex = sai->i_auth.hex; sa->i_auth.data = _(sai->i_auth.data); sa->i_auth.key = _(sai->i_auth.key); sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data); sa->childs = _(sai->childs); + sa->udp_encap = sai->udp_encap; + sa->ipsec_over_udp_port = sai->ipsec_over_udp_port; + sa->dst_port = sai->dst_port; + sa->sw_if_index = sai->sw_if_index; #undef _ @@ -421,8 +441,6 @@ ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai) if (!t) { - clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group, - vec_len (sa->i_dh_data)); sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE; return; } @@ -440,7 +458,7 @@ ikev2_calc_keys (ikev2_sa_t * sa) /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */ u8 *skeyseed = 0; u8 *s = 0; - u16 integ_key_len = 0; + u16 integ_key_len = 0, salt_len = 0; ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ; tr_encr = ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR); @@ -451,6 +469,8 @@ ikev2_calc_keys (ikev2_sa_t * sa) if (tr_integ) integ_key_len = tr_integ->key_len; + else + salt_len = sizeof (u32); vec_append (s, sa->i_nonce); vec_append (s, sa->r_nonce); @@ -468,7 +488,8 @@ ikev2_calc_keys (ikev2_sa_t * sa) int len = tr_prf->key_trunc + /* SK_d */ integ_key_len * 2 + /* SK_ai, SK_ar */ tr_encr->key_len * 2 + /* SK_ei, SK_er */ - tr_prf->key_len * 2; /* SK_pi, SK_pr */ + tr_prf->key_len * 2 + /* SK_pi, SK_pr */ + salt_len * 2; keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len); vec_free (skeyseed); @@ -495,14 +516,14 @@ ikev2_calc_keys (ikev2_sa_t * sa) } /* SK_ei */ - sa->sk_ei = vec_new (u8, tr_encr->key_len); - clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len); - pos += tr_encr->key_len; + sa->sk_ei = vec_new (u8, tr_encr->key_len + salt_len); + clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len + salt_len); + pos += tr_encr->key_len + salt_len; /* SK_er */ - sa->sk_er = vec_new (u8, tr_encr->key_len); - clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len); - pos += tr_encr->key_len; + sa->sk_er = vec_new (u8, tr_encr->key_len + salt_len); + clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len + salt_len); + pos += tr_encr->key_len + salt_len; /* SK_pi */ sa->sk_pi = vec_new (u8, tr_prf->key_len); @@ -588,21 +609,33 @@ ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child) vec_free (keymat); } +static_always_inline u8 * +ikev2_compute_nat_sha1 (u64 ispi, u64 rspi, u32 ip, u16 port) +{ + /* ispi, rspi, ip, port */ + u8 buf[8 + 8 + 4 + 2]; + u8 *res = vec_new (u8, 20); + + clib_memcpy_fast (&buf[0], &ispi, sizeof (ispi)); + clib_memcpy_fast (&buf[8], &rspi, sizeof (rspi)); + clib_memcpy_fast (&buf[8 + 8], &ip, sizeof (ip)); + clib_memcpy_fast (&buf[8 + 8 + 4], &port, sizeof (port)); + SHA1 (buf, sizeof (buf), res); + return res; +} + static void ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa, - ike_header_t * ike) + ike_header_t * ike, udp_header_t * udp) { int p = 0; u32 len = clib_net_to_host_u32 (ike->length); u8 payload = ike->nextpayload; - clib_warning ("ispi %lx rspi %lx nextpayload %x version %x " - "exchange %x flags %x msgid %x length %u", - clib_net_to_host_u64 (ike->ispi), - clib_net_to_host_u64 (ike->rspi), - payload, ike->version, - ike->exchange, ike->flags, - clib_net_to_host_u32 (ike->msgid), len); + ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT request received " + "from %d.%d.%d.%d", + clib_net_to_host_u64 (ike->ispi), + clib_net_to_host_u64 (ike->rspi), sa->iaddr.as_u32); sa->ispi = clib_net_to_host_u64 (ike->ispi); @@ -638,6 +671,37 @@ ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa, else if (payload == IKEV2_PAYLOAD_NOTIFY) { ikev2_notify_t *n = ikev2_parse_notify_payload (ikep); + if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP) + { + u8 *src_sha = + ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0, + clib_net_to_host_u32 (sa-> + iaddr.as_u32), + udp->src_port); + if (clib_memcmp (src_sha, n->data, vec_len (src_sha))) + { + sa->natt = 1; + ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator" + " behind NAT", sa->ispi); + } + vec_free (src_sha); + } + else if (n->msg_type == + IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP) + { + u8 *dst_sha = + ikev2_compute_nat_sha1 (clib_net_to_host_u64 (ike->ispi), 0, + clib_net_to_host_u32 (sa-> + raddr.as_u32), + udp->dst_port); + if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha))) + { + sa->natt = 1; + ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder" + " (self) behind NAT", sa->ispi); + } + vec_free (dst_sha); + } vec_free (n); } else if (payload == IKEV2_PAYLOAD_VENDOR) @@ -646,8 +710,8 @@ ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa, } else { - clib_warning ("unknown payload %u flags %x length %u", payload, - ikep->flags, plen); + ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d", + payload); if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) { ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE); @@ -665,23 +729,19 @@ ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa, static void ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa, - ike_header_t * ike) + ike_header_t * ike, udp_header_t * udp) { int p = 0; u32 len = clib_net_to_host_u32 (ike->length); u8 payload = ike->nextpayload; - clib_warning ("ispi %lx rspi %lx nextpayload %x version %x " - "exchange %x flags %x msgid %x length %u", - clib_net_to_host_u64 (ike->ispi), - clib_net_to_host_u64 (ike->rspi), - payload, ike->version, - ike->exchange, ike->flags, - clib_net_to_host_u32 (ike->msgid), len); - sa->ispi = clib_net_to_host_u64 (ike->ispi); sa->rspi = clib_net_to_host_u64 (ike->rspi); + ikev2_elog_exchange ("ispi %lx rspi %lx IKE_INIT response received " + "from %d.%d.%d.%d", sa->ispi, sa->rspi, + sa->raddr.as_u32); + /* store whole IKE payload - needed for PSK auth */ vec_free (sa->last_sa_init_res_packet_data); vec_add (sa->last_sa_init_res_packet_data, ike, len); @@ -720,6 +780,35 @@ ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa, else if (payload == IKEV2_PAYLOAD_NOTIFY) { ikev2_notify_t *n = ikev2_parse_notify_payload (ikep); + if (n->msg_type == IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP) + { + u8 *src_sha = ikev2_compute_nat_sha1 (ike->ispi, + ike->rspi, + clib_net_to_host_u32 + (sa->raddr.as_u32), + udp->src_port); + if (clib_memcmp (src_sha, n->data, vec_len (src_sha))) + { + ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx responder" + " behind NAT, unsupported", sa->ispi); + } + vec_free (src_sha); + } + else if (n->msg_type == + IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP) + { + u8 *dst_sha = ikev2_compute_nat_sha1 (ike->ispi, + ike->rspi, + sa->iaddr.as_u32, + udp->dst_port); + if (clib_memcmp (dst_sha, n->data, vec_len (dst_sha))) + { + sa->natt = 1; + ikev2_elog_uint (IKEV2_LOG_DEBUG, "ispi %lx initiator" + " (self) behind NAT", sa->ispi); + } + vec_free (dst_sha); + } vec_free (n); } else if (payload == IKEV2_PAYLOAD_VENDOR) @@ -728,8 +817,8 @@ ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa, } else { - clib_warning ("unknown payload %u flags %x length %u", payload, - ikep->flags, plen); + ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d", + payload); if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) { ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE); @@ -746,15 +835,23 @@ ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa, static u8 * ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload) { + ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data (); int p = 0; - u8 last_payload = 0; + u8 last_payload = 0, *plaintext = 0; u8 *hmac = 0; u32 len = clib_net_to_host_u32 (ike->length); ike_payload_header_t *ikep = 0; u32 plen = 0; ikev2_sa_transform_t *tr_integ; + ikev2_sa_transform_t *tr_encr; tr_integ = ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG); + tr_encr = + ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR); + int is_aead = tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16; + + if ((!sa->sk_ar || !sa->sk_ai) && !is_aead) + return 0; while (p < len && *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK) @@ -767,13 +864,12 @@ ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload) if (*payload == IKEV2_PAYLOAD_SK) { - clib_warning ("received IKEv2 payload SK, len %u", plen - 4); last_payload = *payload; } else { - clib_warning ("unknown payload %u flags %x length %u", payload, - ikep->flags, plen); + ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d", + *payload); if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) { sa->unsupported_cp = *payload; @@ -787,25 +883,64 @@ ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload) if (last_payload != IKEV2_PAYLOAD_SK) { - clib_warning ("Last payload must be SK"); + ikev2_elog_error ("Last payload must be SK"); return 0; } - hmac = - ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai, - (u8 *) ike, len - tr_integ->key_trunc); + if (is_aead) + { + if (plen < sizeof (*ikep) + IKEV2_GCM_ICV_SIZE) + return 0; - plen = plen - sizeof (*ikep) - tr_integ->key_trunc; + plen -= sizeof (*ikep) + IKEV2_GCM_ICV_SIZE; + u8 *aad = (u8 *) ike; + u32 aad_len = ikep->payload - aad; + u8 *tag = ikep->payload + plen; - if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc)) + plaintext = ikev2_decrypt_aead_data (ptd, sa, tr_encr, ikep->payload, + plen, aad, aad_len, tag); + } + else { - clib_warning ("message integrity check failed"); + if (len < tr_integ->key_trunc) + return 0; + + hmac = + ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai, + (u8 *) ike, len - tr_integ->key_trunc); + + if (plen < sizeof (*ikep) + tr_integ->key_trunc) + return 0; + + plen = plen - sizeof (*ikep) - tr_integ->key_trunc; + + if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc)) + { + ikev2_elog_error ("message integrity check failed"); + vec_free (hmac); + return 0; + } vec_free (hmac); - return 0; + + plaintext = ikev2_decrypt_data (ptd, sa, tr_encr, ikep->payload, plen); } - vec_free (hmac); - return ikev2_decrypt_data (sa, ikep->payload, plen); + return plaintext; +} + +static_always_inline int +ikev2_is_id_equal (ikev2_id_t * i1, ikev2_id_t * i2) +{ + if (i1->type != i2->type) + return 0; + + if (vec_len (i1->data) != vec_len (i2->data)) + return 0; + + if (memcmp (i1->data, i2->data, vec_len (i1->data))) + return 0; + + return 1; } static void @@ -823,9 +958,8 @@ ikev2_initial_contact_cleanup (ikev2_sa_t * sa) /* find old IKE SAs with the same authenticated identity */ /* *INDENT-OFF* */ pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({ - if (tmp->i_id.type != sa->i_id.type || - vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) || - memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data))) + if (!ikev2_is_id_equal (&tmp->i_id, &sa->i_id) + || !ikev2_is_id_equal(&tmp->r_id, &sa->r_id)) continue; if (sa->rspi != tmp->rspi) @@ -852,20 +986,16 @@ ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) { ikev2_child_sa_t *first_child_sa; int p = 0; - u32 len = clib_net_to_host_u32 (ike->length); u8 payload = ike->nextpayload; u8 *plaintext = 0; - ike_payload_header_t *ikep; u32 plen; - clib_warning ("ispi %lx rspi %lx nextpayload %x version %x " - "exchange %x flags %x msgid %x length %u", - clib_net_to_host_u64 (ike->ispi), - clib_net_to_host_u64 (ike->rspi), - payload, ike->version, - ike->exchange, ike->flags, - clib_net_to_host_u32 (ike->msgid), len); + ikev2_elog_exchange ("ispi %lx rspi %lx EXCHANGE_IKE_AUTH received " + "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi), + clib_host_to_net_u64 (ike->rspi), + sa->is_initiator ? sa->raddr.as_u32 : sa-> + iaddr.as_u32); ikev2_calc_keys (sa); @@ -902,7 +1032,6 @@ ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) if (payload == IKEV2_PAYLOAD_SA) /* 33 */ { - clib_warning ("received payload SA, len %u", plen - sizeof (*ikep)); if (sa->is_initiator) { ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals); @@ -921,9 +1050,6 @@ ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) sa->i_id.type = id->id_type; vec_free (sa->i_id.data); vec_add (sa->i_id.data, id->payload, plen - sizeof (*id)); - - clib_warning ("received payload IDi, len %u id_type %u", - plen - sizeof (*id), id->id_type); } else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */ { @@ -932,9 +1058,6 @@ ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) sa->r_id.type = id->id_type; vec_free (sa->r_id.data); vec_add (sa->r_id.data, id->payload, plen - sizeof (*id)); - - clib_warning ("received payload IDr len %u id_type %u", - plen - sizeof (*id), id->id_type); } else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */ { @@ -952,9 +1075,6 @@ ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) vec_free (sa->i_auth.data); vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a)); } - - clib_warning ("received payload AUTH, len %u auth_type %u", - plen - sizeof (*a), a->auth_method); } else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */ { @@ -971,25 +1091,18 @@ ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) } else if (payload == IKEV2_PAYLOAD_TSI) /* 44 */ { - clib_warning ("received payload TSi, len %u", - plen - sizeof (*ikep)); - vec_free (first_child_sa->tsi); first_child_sa->tsi = ikev2_parse_ts_payload (ikep); } else if (payload == IKEV2_PAYLOAD_TSR) /* 45 */ { - clib_warning ("received payload TSr, len %u", - plen - sizeof (*ikep)); - vec_free (first_child_sa->tsr); first_child_sa->tsr = ikev2_parse_ts_payload (ikep); } else { - clib_warning ("unknown payload %u flags %x length %u data %u", - payload, ikep->flags, plen - 4, - format_hex_bytes, ikep->payload, plen - 4); + ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d", + payload); if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) { @@ -1012,20 +1125,15 @@ ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) { int p = 0; - u32 len = clib_net_to_host_u32 (ike->length); u8 payload = ike->nextpayload; u8 *plaintext = 0; - ike_payload_header_t *ikep; u32 plen; - clib_warning ("ispi %lx rspi %lx nextpayload %x version %x " - "exchange %x flags %x msgid %x length %u", - clib_net_to_host_u64 (ike->ispi), - clib_net_to_host_u64 (ike->rspi), - payload, ike->version, - ike->exchange, ike->flags, - clib_net_to_host_u32 (ike->msgid), len); + sa->liveness_retries = 0; + ikev2_elog_exchange ("ispi %lx rspi %lx INFORMATIONAL received " + "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi), + clib_host_to_net_u64 (ike->rspi), sa->iaddr.as_u32); plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload); @@ -1059,10 +1167,8 @@ ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa, } else { - clib_warning ("unknown payload %u flags %x length %u data %u", - payload, ikep->flags, plen - 4, - format_hex_bytes, ikep->payload, plen - 4); - + ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d", + payload); if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) { sa->unsupported_cp = payload; @@ -1083,7 +1189,6 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) { int p = 0; - u32 len = clib_net_to_host_u32 (ike->length); u8 payload = ike->nextpayload; u8 *plaintext = 0; u8 rekeying = 0; @@ -1097,13 +1202,9 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, ikev2_sa_proposal_t *proposal = 0; ikev2_child_sa_t *child_sa; - clib_warning ("ispi %lx rspi %lx nextpayload %x version %x " - "exchange %x flags %x msgid %x length %u", - clib_net_to_host_u64 (ike->ispi), - clib_net_to_host_u64 (ike->rspi), - payload, ike->version, - ike->exchange, ike->flags, - clib_net_to_host_u32 (ike->msgid), len); + ikev2_elog_exchange ("ispi %lx rspi %lx CREATE_CHILD_SA received " + "from %d.%d.%d.%d", clib_host_to_net_u64 (ike->ispi), + clib_host_to_net_u64 (ike->rspi), sa->raddr.as_u32); plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload); @@ -1154,14 +1255,12 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, } else { - clib_warning ("unknown payload %u flags %x length %u data %u", - payload, ikep->flags, plen - 4, - format_hex_bytes, ikep->payload, plen - 4); - + ikev2_elog_uint (IKEV2_LOG_ERROR, "Unknown payload! type=%d", + payload); if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) { sa->unsupported_cp = payload; - return; + goto cleanup_and_exit; } } @@ -1194,7 +1293,8 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1); if (!child_sa) { - clib_warning ("child SA spi %lx not found", n->spi); + ikev2_elog_uint (IKEV2_LOG_ERROR, "child SA spi %lx not found", + n->spi); goto cleanup_and_exit; } vec_add2 (sa->rekey, rekey, 1); @@ -1280,7 +1380,7 @@ ikev2_sa_match_ts (ikev2_sa_t * sa) ikev2_main_t *km = &ikev2_main; ikev2_profile_t *p; ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0; - ikev2_id_t *id; + ikev2_id_t *id_rem, *id_loc; /* *INDENT-OFF* */ pool_foreach (p, km->profiles, ({ @@ -1289,21 +1389,24 @@ ikev2_sa_match_ts (ikev2_sa_t * sa) { p_tsi = &p->loc_ts; p_tsr = &p->rem_ts; - id = &sa->r_id; + id_rem = &sa->r_id; + id_loc = &sa->i_id; } else { p_tsi = &p->rem_ts; p_tsr = &p->loc_ts; - id = &sa->i_id; + id_rem = &sa->i_id; + id_loc = &sa->r_id; } /* check id */ - if (p->rem_id.type != id->type || - vec_len(p->rem_id.data) != vec_len(id->data) || - memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data))) + if (!ikev2_is_id_equal (&p->rem_id, id_rem) + || !ikev2_is_id_equal (&p->loc_id, id_loc)) continue; + sa->profile_index = p - km->profiles; + vec_foreach(ts, sa->childs[0].tsi) { if (ikev2_ts_cmp(p_tsi, ts)) @@ -1356,8 +1459,9 @@ ikev2_sa_auth (ikev2_sa_t * sa) if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC || sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)) { - clib_warning ("unsupported authentication method %u", - sa->i_auth.method); + ikev2_elog_uint (IKEV2_LOG_ERROR, + "unsupported authentication method %u", + sa->i_auth.method); ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED); return; } @@ -1365,17 +1469,19 @@ ikev2_sa_auth (ikev2_sa_t * sa) key_pad = format (0, "%s", IKEV2_KEY_PAD); authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator); - ikev2_id_t *sa_id; + ikev2_id_t *id_rem, *id_loc; ikev2_auth_t *sa_auth; if (sa->is_initiator) { - sa_id = &sa->r_id; + id_rem = &sa->r_id; + id_loc = &sa->i_id; sa_auth = &sa->r_auth; } else { - sa_id = &sa->i_id; + id_rem = &sa->i_id; + id_loc = &sa->r_id; sa_auth = &sa->i_auth; } @@ -1383,9 +1489,8 @@ ikev2_sa_auth (ikev2_sa_t * sa) pool_foreach (p, km->profiles, ({ /* check id */ - if (p->rem_id.type != sa_id->type || - vec_len(p->rem_id.data) != vec_len(sa_id->data) || - memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data))) + 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) @@ -1424,6 +1529,11 @@ ikev2_sa_auth (ikev2_sa_t * sa) })); /* *INDENT-ON* */ + if (sel_p) + { + 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) @@ -1433,6 +1543,8 @@ ikev2_sa_auth (ikev2_sa_t * sa) vec_free (sa->r_id.data); sa->r_id.data = vec_dup (sel_p->loc_id.data); sa->r_id.type = sel_p->loc_id.type; + sa->i_id.data = vec_dup (sel_p->rem_id.data); + sa->i_id.type = sel_p->rem_id.type; /* generate our auth data */ authmsg = ikev2_sa_generate_authmsg (sa, 1); @@ -1453,10 +1565,18 @@ ikev2_sa_auth (ikev2_sa_t * sa) sa->childs[0].r_proposals = ikev2_select_proposal (sa->childs[0].i_proposals, IKEV2_PROTOCOL_ESP); + + if (~0 != sel_p->tun_itf) + { + sa->is_tun_itf_set = 1; + sa->tun_itf = sel_p->tun_itf; + } } } else { + ikev2_elog_uint (IKEV2_LOG_ERROR, "authentication failed, no matching " + "profile found! ispi %lx", sa->ispi); ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED); } vec_free (psk); @@ -1468,7 +1588,7 @@ static void ikev2_sa_auth_init (ikev2_sa_t * sa) { ikev2_main_t *km = &ikev2_main; - u8 *authmsg, *key_pad, *psk = 0, *auth = 0; + u8 *authmsg, *key_pad, *psk = 0; ikev2_sa_transform_t *tr_prf; tr_prf = @@ -1478,8 +1598,9 @@ ikev2_sa_auth_init (ikev2_sa_t * sa) if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC || sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)) { - clib_warning ("unsupported authentication method %u", - sa->i_auth.method); + ikev2_elog_uint (IKEV2_LOG_ERROR, + "unsupported authentication method %u", + sa->i_auth.method); ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED); return; } @@ -1487,8 +1608,6 @@ ikev2_sa_auth_init (ikev2_sa_t * sa) 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); - auth = ikev2_calc_prf (tr_prf, psk, authmsg); - if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) { @@ -1503,7 +1622,6 @@ ikev2_sa_auth_init (ikev2_sa_t * sa) vec_free (psk); vec_free (key_pad); - vec_free (auth); vec_free (authmsg); } @@ -1521,6 +1639,7 @@ ikev2_mk_remote_sa_id (u32 sai, u32 ci, u32 ti) typedef struct { + u32 sw_if_index; u32 salt_local; u32 salt_remote; u32 local_sa_id; @@ -1533,41 +1652,86 @@ typedef struct ip46_address_t local_ip; ip46_address_t remote_ip; ipsec_key_t loc_ckey, rem_ckey, loc_ikey, rem_ikey; + u8 is_rekey; + u32 old_remote_sa_id; + u16 ipsec_over_udp_port; + u16 src_port; + u16 dst_port; } ikev2_add_ipsec_tunnel_args_t; static void ikev2_add_tunnel_from_main (ikev2_add_ipsec_tunnel_args_t * a) { + ikev2_main_t *km = &ikev2_main; u32 sw_if_index; - int rv; + int rv = 0; + + if (~0 == a->sw_if_index) + { + /* no tunnel associated with the SA/profile - create a new one */ + rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0, + &a->local_ip, &a->remote_ip, 0, + TUNNEL_ENCAP_DECAP_FLAG_NONE, IP_DSCP_CS0, + TUNNEL_MODE_P2P, &sw_if_index); + + if (rv == VNET_API_ERROR_IF_ALREADY_EXISTS) + { + if (hash_get (km->sw_if_indices, sw_if_index)) + /* interface is managed by IKE; proceed with updating SAs */ + rv = 0; + } + hash_set1 (km->sw_if_indices, sw_if_index); + } + else + { + sw_if_index = a->sw_if_index; + vnet_sw_interface_admin_up (vnet_get_main (), sw_if_index); + } - rv = ipip_add_tunnel (IPIP_TRANSPORT_IP4, ~0, - &a->local_ip, &a->remote_ip, 0, 0, &sw_if_index); + if (rv) + { + ikev2_elog_peers (IKEV2_LOG_ERROR, "installing ipip tunnel failed! " + "loc:%d.%d.%d.%d rem:%d.%d.%d.%d", + a->local_ip.ip4.as_u32, a->remote_ip.ip4.as_u32); + return; + } + + u32 *sas_in = NULL; + vec_add1 (sas_in, a->remote_sa_id); + if (a->is_rekey) + { + ipsec_tun_protect_del (sw_if_index, NULL); + + /* replace local SA immediately */ + ipsec_sa_unlock_id (a->local_sa_id); + + /* keep the old sa */ + vec_add1 (sas_in, a->old_remote_sa_id); + } rv |= ipsec_sa_add_and_lock (a->local_sa_id, a->local_spi, IPSEC_PROTOCOL_ESP, a->encr_type, &a->loc_ckey, a->integ_type, &a->loc_ikey, a->flags, 0, a->salt_local, &a->local_ip, - &a->remote_ip, NULL); + &a->remote_ip, NULL, a->src_port, a->dst_port); rv |= ipsec_sa_add_and_lock (a->remote_sa_id, a->remote_spi, IPSEC_PROTOCOL_ESP, a->encr_type, &a->rem_ckey, a->integ_type, &a->rem_ikey, (a->flags | IPSEC_SA_FLAG_IS_INBOUND), 0, a->salt_remote, &a->remote_ip, - &a->local_ip, NULL); + &a->local_ip, NULL, a->ipsec_over_udp_port, + a->ipsec_over_udp_port); - u32 *sas_in = NULL; - vec_add1 (sas_in, a->remote_sa_id); - rv |= ipsec_tun_protect_update (sw_if_index, a->local_sa_id, sas_in); + rv |= ipsec_tun_protect_update (sw_if_index, NULL, a->local_sa_id, sas_in); } static int -ikev2_create_tunnel_interface (vnet_main_t * vnm, +ikev2_create_tunnel_interface (vlib_main_t * vm, u32 thread_index, ikev2_sa_t * sa, ikev2_child_sa_t * child, u32 sa_index, - u32 child_index) + u32 child_index, u8 is_rekey) { ikev2_main_t *km = &ikev2_main; ipsec_crypto_alg_t encr_type; @@ -1590,7 +1754,7 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, { ip46_address_set_ip4 (&a.local_ip, &sa->iaddr); ip46_address_set_ip4 (&a.remote_ip, &sa->raddr); - proposals = child->i_proposals; + proposals = child->r_proposals; a.local_spi = child->r_proposals[0].spi; a.remote_spi = child->i_proposals[0].spi; } @@ -1598,12 +1762,20 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, { ip46_address_set_ip4 (&a.local_ip, &sa->raddr); ip46_address_set_ip4 (&a.remote_ip, &sa->iaddr); - proposals = child->r_proposals; + proposals = child->i_proposals; a.local_spi = child->i_proposals[0].spi; a.remote_spi = child->r_proposals[0].spi; } a.flags = IPSEC_SA_FLAG_USE_ANTI_REPLAY; + if (sa->udp_encap) + { + a.flags |= IPSEC_SA_FLAG_IS_TUNNEL; + a.flags |= IPSEC_SA_FLAG_UDP_ENCAP; + } + if (sa->natt) + a.flags |= IPSEC_SA_FLAG_UDP_ENCAP; + a.is_rekey = is_rekey; tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN); if (tr && tr->esn_type) @@ -1714,6 +1886,7 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, a.salt_remote = child->salt_er; a.salt_local = child->salt_ei; } + a.dst_port = a.src_port = sa->ipsec_over_udp_port; } else { @@ -1726,15 +1899,16 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, a.salt_remote = child->salt_ei; a.salt_local = child->salt_er; } + a.dst_port = sa->natt ? sa->dst_port : sa->ipsec_over_udp_port; + a.src_port = sa->ipsec_over_udp_port; } - if (sa->is_profile_index_set) + if (sa->is_initiator && sa->profile_index != ~0) p = pool_elt_at_index (km->profiles, sa->profile_index); if (p && p->lifetime) { - child->time_to_expiration = - vlib_time_now (vnm->vlib_main) + p->lifetime; + child->time_to_expiration = vlib_time_now (vm) + p->lifetime; if (p->lifetime_jitter) { // This is not much better than rand(3), which Coverity warns @@ -1742,7 +1916,7 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, // however fast. If this perturbance to the expiration time // needs to use a better RNG then we may need to use something // like /dev/urandom which has significant overhead. - u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6); + u32 rnd = (u32) (vlib_time_now (vm) * 1e6); rnd = random_u32 (&rnd); child->time_to_expiration += 1 + (rnd % p->lifetime_jitter); @@ -1750,17 +1924,44 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, } if (thread_index & 0xffffffc0) - clib_warning ("error: thread index exceeds max range 0x3f!"); + ikev2_elog_error ("error: thread index exceeds max range 0x3f!"); if (child_index & 0xfffff000 || sa_index & 0xfffff000) - clib_warning ("error: sa/child index exceeds max range 0xfff!"); + ikev2_elog_error ("error: sa/child index exceeds max range 0xfff!"); child->local_sa_id = a.local_sa_id = ikev2_mk_local_sa_id (sa_index, child_index, thread_index); - child->remote_sa_id = - a.remote_sa_id = - ikev2_mk_remote_sa_id (sa_index, child_index, thread_index); + + u32 remote_sa_id = ikev2_mk_remote_sa_id (sa_index, child_index, + thread_index); + + if (is_rekey) + { + /* create a new remote SA ID to keep the old SA for a bit longer + * so the peer has some time to swap their SAs */ + + /* use most significat bit of child index part in id */ + u32 mask = 0x800; + if (sa->current_remote_id_mask) + { + sa->old_remote_id = a.old_remote_sa_id = remote_sa_id | mask; + sa->current_remote_id_mask = 0; + } + else + { + sa->old_remote_id = a.old_remote_sa_id = remote_sa_id; + sa->current_remote_id_mask = mask; + remote_sa_id |= mask; + } + sa->old_id_expiration = 3.0; + sa->old_remote_id_present = 1; + } + + child->remote_sa_id = a.remote_sa_id = remote_sa_id; + + a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0); + a.ipsec_over_udp_port = sa->ipsec_over_udp_port; vl_api_rpc_call_main_thread (ikev2_add_tunnel_from_main, (u8 *) & a, sizeof (a)); @@ -1773,30 +1974,61 @@ typedef struct ip46_address_t remote_ip; u32 remote_sa_id; u32 local_sa_id; + u32 sw_if_index; } ikev2_del_ipsec_tunnel_args_t; +static_always_inline u32 +ikev2_flip_alternate_sa_bit (u32 id) +{ + u32 mask = 0x800; + if (mask & id) + return id & ~mask; + return id | mask; +} + static void ikev2_del_tunnel_from_main (ikev2_del_ipsec_tunnel_args_t * a) { - /* *INDENT-OFF* */ - ipip_tunnel_key_t key = { - .src = a->local_ip, - .dst = a->remote_ip, - .transport = IPIP_TRANSPORT_IP4, - .fib_index = 0, - }; - ipip_tunnel_t *ipip; - /* *INDENT-ON* */ + ikev2_main_t *km = &ikev2_main; + ipip_tunnel_t *ipip = NULL; + u32 sw_if_index; + + if (~0 == a->sw_if_index) + { + /* *INDENT-OFF* */ + ipip_tunnel_key_t key = { + .src = a->local_ip, + .dst = a->remote_ip, + .transport = IPIP_TRANSPORT_IP4, + .fib_index = 0, + }; + /* *INDENT-ON* */ - ipip = ipip_tunnel_db_find (&key); + ipip = ipip_tunnel_db_find (&key); - if (ipip) + if (ipip) + { + sw_if_index = ipip->sw_if_index; + hash_unset (km->sw_if_indices, ipip->sw_if_index); + } + else + sw_if_index = ~0; + } + else { - ipsec_tun_protect_del (ipip->sw_if_index); - ipsec_sa_unlock_id (a->remote_sa_id); - ipsec_sa_unlock_id (a->local_sa_id); - ipip_del_tunnel (ipip->sw_if_index); + sw_if_index = a->sw_if_index; + vnet_sw_interface_admin_down (vnet_get_main (), sw_if_index); } + + if (~0 != sw_if_index) + ipsec_tun_protect_del (sw_if_index, NULL); + + ipsec_sa_unlock_id (a->remote_sa_id); + ipsec_sa_unlock_id (a->local_sa_id); + ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (a->remote_sa_id)); + + if (ipip) + ipip_del_tunnel (ipip->sw_if_index); } static int @@ -1820,6 +2052,7 @@ ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa, a.remote_sa_id = child->remote_sa_id; a.local_sa_id = child->local_sa_id; + a.sw_if_index = (sa->is_tun_itf_set ? sa->tun_itf : ~0); vl_api_rpc_call_main_thread (ikev2_del_tunnel_from_main, (u8 *) & a, sizeof (a)); @@ -1827,7 +2060,8 @@ ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa, } static u32 -ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) +ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user, + udp_header_t * udp) { v8 *integ = 0; ike_payload_header_t *ph; @@ -1881,10 +2115,30 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) } else { + ASSERT (udp); + ike->rspi = clib_host_to_net_u64 (sa->rspi); ikev2_payload_add_sa (chain, sa->r_proposals); ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data); ikev2_payload_add_nonce (chain, sa->r_nonce); + + u8 *nat_detection_sha1 = + ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi), + clib_host_to_net_u64 (sa->rspi), + clib_host_to_net_u32 (sa->raddr.as_u32), + udp->dst_port); + ikev2_payload_add_notify (chain, + IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP, + nat_detection_sha1); + vec_free (nat_detection_sha1); + nat_detection_sha1 = + ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa->ispi), + clib_host_to_net_u64 (sa->rspi), + sa->iaddr.as_u32, udp->src_port); + ikev2_payload_add_notify (chain, + IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP, + nat_detection_sha1); + vec_free (nat_detection_sha1); } } else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH) @@ -1892,6 +2146,7 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) if (sa->state == IKEV2_STATE_AUTHENTICATED) { ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR); + ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI); ikev2_payload_add_auth (chain, &sa->r_auth); ikev2_payload_add_sa (chain, sa->childs[0].r_proposals); ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI); @@ -1933,10 +2188,13 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) else if (sa->state == IKEV2_STATE_SA_INIT) { ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI); + ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR); ikev2_payload_add_auth (chain, &sa->i_auth); ikev2_payload_add_sa (chain, sa->childs[0].i_proposals); ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI); ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR); + ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_INITIAL_CONTACT, + 0); } else { @@ -2011,7 +2269,7 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) } else { - if (sa->rekey) + if (vec_len (sa->rekey) > 0) { ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal); ikev2_payload_add_nonce (chain, sa->r_nonce); @@ -2069,7 +2327,7 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) } else { - + ikev2_main_per_thread_data_t *ptd = ikev2_get_per_thread_data (); ikev2_payload_chain_add_padding (chain, tr_encr->block_size); /* SK payload */ @@ -2077,24 +2335,40 @@ ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) ph = (ike_payload_header_t *) & ike->payload[0]; ph->nextpayload = chain->first_payload_type; ph->flags = 0; - int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload); - plen += enc_len; - - /* add space for hmac */ - plen += tr_integ->key_trunc; + int is_aead = + tr_encr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_GCM_16; + int iv_len = is_aead ? IKEV2_GCM_IV_SIZE : tr_encr->block_size; + plen += vec_len (chain->data) + iv_len; + + /* add space for hmac/tag */ + if (tr_integ) + plen += tr_integ->key_trunc; + else + plen += IKEV2_GCM_ICV_SIZE; tlen += plen; /* payload and total length */ ph->length = clib_host_to_net_u16 (plen); ike->length = clib_host_to_net_u32 (tlen); - /* calc integrity data for whole packet except hash itself */ - integ = - ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar, - (u8 *) ike, tlen - tr_integ->key_trunc); - - clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc - - sizeof (*ike), integ, tr_integ->key_trunc); + if (is_aead) + { + ikev2_encrypt_aead_data (ptd, sa, tr_encr, chain->data, + ph->payload, (u8 *) ike, + sizeof (*ike) + sizeof (*ph), + ph->payload + plen - sizeof (*ph) - + IKEV2_GCM_ICV_SIZE); + } + else + { + ikev2_encrypt_data (ptd, sa, tr_encr, chain->data, ph->payload); + integ = + ikev2_calc_integr (tr_integ, + sa->is_initiator ? sa->sk_ai : sa->sk_ar, + (u8 *) ike, tlen - tr_integ->key_trunc); + clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc - + sizeof (*ike), integ, tr_integ->key_trunc); + } /* store whole IKE payload - needed for retransmit */ vec_free (sa->last_res_packet_data); @@ -2151,17 +2425,21 @@ ikev2_retransmit_sa_init (ike_header_t * ike, ike->length = tmp->length; clib_memcpy_fast(ike->payload, tmp->payload, clib_net_to_host_u32(tmp->length) - sizeof(*ike)); - clib_warning("IKE_SA_INIT retransmit from %U to %U", - format_ip4_address, &raddr, - format_ip4_address, &iaddr); + ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, + "ispi %lx IKE_SA_INIT retransmit " + "from %d.%d.%d.%d to %d.%d.%d.%d", + ike->ispi, + raddr.as_u32, iaddr.as_u32); return 1; } /* else ignore req */ else { - clib_warning("IKE_SA_INIT ignore from %U to %U", - format_ip4_address, &raddr, - format_ip4_address, &iaddr); + ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, + "ispi %lx IKE_SA_INIT ignore " + "from %d.%d.%d.%d to %d.%d.%d.%d", + ike->ispi, + raddr.as_u32, iaddr.as_u32); return -1; } } @@ -2203,23 +2481,47 @@ ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike) ike->length = tmp->length; clib_memcpy_fast (ike->payload, tmp->payload, clib_net_to_host_u32 (tmp->length) - sizeof (*ike)); - clib_warning ("IKE msgid %u retransmit from %U to %U", - msg_id, - format_ip4_address, &sa->raddr, - format_ip4_address, &sa->iaddr); + ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE retransmit msgid %d", + msg_id, sa->raddr.as_u32, sa->iaddr.as_u32); return 1; } /* old req ignore */ else { - clib_warning ("IKE msgid %u req ignore from %U to %U", - msg_id, - format_ip4_address, &sa->raddr, - format_ip4_address, &sa->iaddr); - return -1; + ikev2_elog_uint_peers (IKEV2_LOG_DEBUG, "IKE req ignore msgid %d", + msg_id, sa->raddr.as_u32, sa->iaddr.as_u32); + } + return -1; +} + +static void +ikev2_init_sa (vlib_main_t * vm, ikev2_sa_t * sa) +{ + ikev2_main_t *km = &ikev2_main; + sa->liveness_period_check = vlib_time_now (vm) + km->liveness_period; + sa->profile_index = ~0; +} + +static void +ikev2_del_sa_init_from_main (u64 * ispi) +{ + ikev2_main_t *km = &ikev2_main; + uword *p = hash_get (km->sa_by_ispi, *ispi); + if (p) + { + ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]); + hash_unset (km->sa_by_ispi, sai->ispi); + ikev2_sa_free_all_vec (sai); + pool_put (km->sais, sai); } } +static void +ikev2_del_sa_init (u64 ispi) +{ + vl_api_rpc_call_main_thread (ikev2_del_sa_init_from_main, (u8 *) & ispi, + sizeof (ispi)); +} static uword ikev2_node_fn (vlib_main_t * vm, @@ -2252,7 +2554,7 @@ ikev2_node_fn (vlib_main_t * vm, ikev2_sa_t *sa0 = 0; ikev2_sa_t sa; /* temporary store for SA */ int len = 0; - int r; + int r, is_req = 0, has_non_esp_marker = 0; /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; @@ -2263,11 +2565,31 @@ ikev2_node_fn (vlib_main_t * vm, n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); - ike0 = vlib_buffer_get_current (b0); - vlib_buffer_advance (b0, -sizeof (*udp0)); - udp0 = vlib_buffer_get_current (b0); - vlib_buffer_advance (b0, -sizeof (*ip40)); - ip40 = vlib_buffer_get_current (b0); + + if (b0->punt_reason == ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0]) + { + u8 *ptr = vlib_buffer_get_current (b0); + ip40 = (ip4_header_t *) ptr; + ptr += sizeof (*ip40); + udp0 = (udp_header_t *) ptr; + ptr += sizeof (*udp0); + ike0 = (ike_header_t *) ptr; + } + else + { + ike0 = vlib_buffer_get_current (b0); + vlib_buffer_advance (b0, -sizeof (*udp0)); + udp0 = vlib_buffer_get_current (b0); + vlib_buffer_advance (b0, -sizeof (*ip40)); + ip40 = vlib_buffer_get_current (b0); + } + + /* check for non-esp marker */ + if (*((u32 *) ike0) == 0) + { + ike0 = (ike_header_t *) ((u8 *) ike0 + sizeof (u32)); + has_non_esp_marker = 1; + } if (ike0->version != IKE_VERSION_2) { @@ -2287,6 +2609,7 @@ ikev2_node_fn (vlib_main_t * vm, { sa0->raddr.as_u32 = ip40->dst_address.as_u32; sa0->iaddr.as_u32 = ip40->src_address.as_u32; + sa0->dst_port = clib_net_to_host_u16 (udp0->src_port); r = ikev2_retransmit_sa_init (ike0, sa0->iaddr, sa0->raddr); @@ -2306,7 +2629,7 @@ ikev2_node_fn (vlib_main_t * vm, goto dispatch0; } - ikev2_process_sa_init_req (vm, sa0, ike0); + ikev2_process_sa_init_req (vm, sa0, ike0, udp0); if (sa0->state == IKEV2_STATE_SA_INIT) { @@ -2320,7 +2643,7 @@ ikev2_node_fn (vlib_main_t * vm, if (sa0->state == IKEV2_STATE_SA_INIT || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE) { - len = ikev2_generate_message (sa0, ike0, 0); + len = ikev2_generate_message (sa0, ike0, 0, udp0); } if (sa0->state == IKEV2_STATE_SA_INIT) @@ -2329,6 +2652,7 @@ ikev2_node_fn (vlib_main_t * vm, pool_get (km->per_thread_data[thread_index].sas, sa0); clib_memcpy_fast (sa0, &sa, sizeof (*sa0)); + ikev2_init_sa (vm, sa0); hash_set (km-> per_thread_data[thread_index].sa_by_rspi, sa0->rspi, @@ -2343,10 +2667,13 @@ ikev2_node_fn (vlib_main_t * vm, } else //received sa_init without initiator flag { - ikev2_process_sa_init_resp (vm, sa0, ike0); + sa0->raddr.as_u32 = ip40->src_address.as_u32; + sa0->iaddr.as_u32 = ip40->dst_address.as_u32; + ikev2_process_sa_init_resp (vm, sa0, ike0, udp0); if (sa0->state == IKEV2_STATE_SA_INIT) { + is_req = 1; ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH; uword *p = hash_get (km->sa_by_ispi, ike0->ispi); if (p) @@ -2354,10 +2681,20 @@ ikev2_node_fn (vlib_main_t * vm, ikev2_sa_t *sai = pool_elt_at_index (km->sais, p[0]); - ikev2_complete_sa_data (sa0, sai); - ikev2_calc_keys (sa0); - ikev2_sa_auth_init (sa0); - len = ikev2_generate_message (sa0, ike0, 0); + if (clib_atomic_bool_cmp_and_swap + (&sai->init_response_received, 0, 1)) + { + ikev2_complete_sa_data (sa0, sai); + ikev2_calc_keys (sa0); + ikev2_sa_auth_init (sa0); + len = + ikev2_generate_message (sa0, ike0, 0, udp0); + } + else + { + /* we've already processed sa-init response */ + sa0->state = IKEV2_STATE_UNKNOWN; + } } } @@ -2404,6 +2741,7 @@ ikev2_node_fn (vlib_main_t * vm, goto dispatch0; } + sa0->dst_port = clib_net_to_host_u16 (udp0->src_port); ikev2_process_auth_req (vm, sa0, ike0); ikev2_sa_auth (sa0); if (sa0->state == IKEV2_STATE_AUTHENTICATED) @@ -2411,27 +2749,18 @@ ikev2_node_fn (vlib_main_t * vm, ikev2_initial_contact_cleanup (sa0); ikev2_sa_match_ts (sa0); if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE) - ikev2_create_tunnel_interface (km->vnet_main, - thread_index, sa0, + ikev2_create_tunnel_interface (vm, thread_index, sa0, &sa0->childs[0], - p[0], 0); + p[0], 0, 0); } if (sa0->is_initiator) { - uword *p = hash_get (km->sa_by_ispi, ike0->ispi); - if (p) - { - ikev2_sa_t *sai = - pool_elt_at_index (km->sais, p[0]); - hash_unset (km->sa_by_ispi, sai->ispi); - ikev2_sa_free_all_vec (sai); - pool_put (km->sais, sai); - } + ikev2_del_sa_init (ike0->ispi); } else { - len = ikev2_generate_message (sa0, ike0, 0); + len = ikev2_generate_message (sa0, ike0, 0, udp0); } } } @@ -2495,9 +2824,10 @@ ikev2_node_fn (vlib_main_t * vm, } } } - if (!sa0->is_initiator) + if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE)) { - len = ikev2_generate_message (sa0, ike0, 0); + ike0->flags |= IKEV2_HDR_FLAG_RESPONSE; + len = ikev2_generate_message (sa0, ike0, 0, udp0); } } } @@ -2534,34 +2864,38 @@ ikev2_node_fn (vlib_main_t * vm, { if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE) { + if (sa0->childs) + ikev2_sa_free_all_child_sa (&sa0->childs); ikev2_child_sa_t *child; vec_add2 (sa0->childs, child, 1); + clib_memset (child, 0, sizeof (*child)); child->r_proposals = sa0->rekey[0].r_proposal; child->i_proposals = sa0->rekey[0].i_proposal; child->tsi = sa0->rekey[0].tsi; child->tsr = sa0->rekey[0].tsr; - ikev2_create_tunnel_interface (km->vnet_main, - thread_index, sa0, - child, p[0], - child - sa0->childs); + ikev2_create_tunnel_interface (vm, thread_index, + sa0, child, p[0], + child - sa0->childs, + 1); } if (sa0->is_initiator) { - vec_del1 (sa0->rekey, 0); + vec_free (sa0->rekey); } else { - len = ikev2_generate_message (sa0, ike0, 0); + len = ikev2_generate_message (sa0, ike0, 0, udp0); } } } } else { - clib_warning ("IKEv2 exchange %u packet received from %U to %U", - ike0->exchange, - format_ip4_address, ip40->src_address.as_u8, - format_ip4_address, ip40->dst_address.as_u8); + ikev2_elog_uint_peers (IKEV2_LOG_WARNING, "IKEv2 exchange %d " + "received from %d.%d.%d.%d to %d.%d.%d.%d", + ike0->exchange, + ip40->src_address.as_u32, + ip40->dst_address.as_u32); } dispatch0: @@ -2579,6 +2913,29 @@ ikev2_node_fn (vlib_main_t * vm, ip40->dst_address.as_u32 = sa0->iaddr.as_u32; ip40->src_address.as_u32 = sa0->raddr.as_u32; } + + if (is_req) + { + udp0->dst_port = udp0->src_port = + clib_net_to_host_u16 (ikev2_get_port (sa0)); + + if (udp0->dst_port == clib_net_to_host_u16 (IKEV2_PORT_NATT) + && sa0->natt) + { + if (!has_non_esp_marker) + len = ikev2_insert_non_esp_marker (ike0, len); + } + } + else + { + if (has_non_esp_marker) + len += sizeof (ikev2_non_esp_marker); + + u16 tp = udp0->dst_port; + udp0->dst_port = udp0->src_port; + udp0->src_port = tp; + } + udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t)); udp0->checksum = 0; @@ -2678,24 +3035,27 @@ ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa, return r; } - /* Integrity */ - error = 1; - vec_foreach (td, km->supported_transforms) - { - if (td->type == IKEV2_TRANSFORM_TYPE_INTEG - && td->integ_type == ts->integ_alg) + if (IKEV2_TRANSFORM_INTEG_TYPE_NONE != ts->integ_alg) + { + /* Integrity */ + error = 1; + vec_foreach (td, km->supported_transforms) { - vec_add1 (proposal->transforms, *td); - error = 0; - break; + if (td->type == IKEV2_TRANSFORM_TYPE_INTEG + && td->integ_type == ts->integ_alg) + { + vec_add1 (proposal->transforms, *td); + error = 0; + break; + } } - } - if (error) - { - clib_warning - ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG"); - r = clib_error_return (0, "Unsupported algorithm"); - return r; + if (error) + { + ikev2_elog_error + ("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG"); + r = clib_error_return (0, "Unsupported algorithm"); + return r; + } } /* PRF */ @@ -2720,7 +3080,7 @@ ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa, } /* DH */ - if (is_ike || ts->dh_type != IKEV2_TRANSFORM_DH_TYPE_NONE) + if (is_ike) { error = 1; vec_foreach (td, km->supported_transforms) @@ -2752,7 +3112,6 @@ ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa, { vec_add1 (proposal->transforms, *td); error = 0; - break; } } if (error) @@ -2782,7 +3141,7 @@ ikev2_profile_index_by_name (u8 * name) static void ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst, - u32 bi0, u32 len) + u32 bi0, u32 len, u16 src_port, u16 dst_port, u32 sw_if_index) { ip4_header_t *ip40; udp_header_t *udp0; @@ -2805,14 +3164,16 @@ ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst, ip40->protocol = IP_PROTOCOL_UDP; ip40->dst_address.as_u32 = dst->as_u32; ip40->src_address.as_u32 = src->as_u32; - udp0->dst_port = clib_host_to_net_u16 (500); - udp0->src_port = clib_host_to_net_u16 (500); + udp0->dst_port = clib_host_to_net_u16 (dst_port); + udp0->src_port = clib_host_to_net_u16 (src_port); udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t)); udp0->checksum = 0; b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t); ip40->length = clib_host_to_net_u16 (b0->current_length); ip40->checksum = ip4_header_checksum (ip40); + vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0; /* send the request */ f = vlib_get_frame_to_node (vm, ip4_lookup_node.index); @@ -2849,30 +3210,176 @@ ikev2_set_local_key (vlib_main_t * vm, u8 * file) return 0; } -clib_error_t * -ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add) +static_always_inline vnet_api_error_t +ikev2_register_udp_port (ikev2_profile_t * p, u16 port) { ikev2_main_t *km = &ikev2_main; - ikev2_profile_t *p; + udp_dst_port_info_t *pi; - if (is_add) - { - if (ikev2_profile_index_by_name (name)) - return clib_error_return (0, "policy %v already exists", name); + uword *v = hash_get (km->udp_ports, port); + pi = udp_get_dst_port_info (&udp_main, port, UDP_IP4); - pool_get (km->profiles, p); - clib_memset (p, 0, sizeof (*p)); - p->name = vec_dup (name); - p->responder.sw_if_index = ~0; - uword index = p - km->profiles; - mhash_set_mem (&km->profile_index_by_name, name, &index, 0); + if (v) + { + /* IKE already uses this port, only increment reference counter */ + ASSERT (pi); + v[0]++; } else { - p = ikev2_profile_index_by_name (name); - if (!p) + 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); + } + p->ipsec_over_udp_port = port; + return 0; +} + +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); + } + + p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE; +} + +static void +ikev2_initiate_delete_ike_sa_internal (vlib_main_t * vm, + ikev2_main_per_thread_data_t * tkm, + ikev2_sa_t * sa) +{ + ikev2_main_t *km = &ikev2_main; + ip4_address_t *src, *dst; + + /* Create the Initiator notification for IKE SA removal */ + ike_header_t *ike0; + u32 bi0 = 0; + int len; + + bi0 = ikev2_get_new_ike_header_buff (vm, &ike0); + if (!bi0) + { + ikev2_log_error ("buffer alloc failure"); + return; + } + + ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL; + ike0->ispi = clib_host_to_net_u64 (sa->ispi); + ike0->rspi = clib_host_to_net_u64 (sa->rspi); + vec_resize (sa->del, 1); + sa->del->protocol_id = IKEV2_PROTOCOL_IKE; + sa->del->spi = sa->ispi; + ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1); + sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid); + len = ikev2_generate_message (sa, ike0, 0, 0); + + if (sa->is_initiator) + { + src = &sa->iaddr; + dst = &sa->raddr; + } + else + { + dst = &sa->iaddr; + src = &sa->raddr; + } + + ikev2_send_ike (vm, src, dst, bi0, len, + ikev2_get_port (sa), sa->dst_port, 0); + + /* delete local SA */ + ikev2_child_sa_t *c; + vec_foreach (c, sa->childs) + ikev2_delete_tunnel_interface (km->vnet_main, sa, c); + + u64 rspi = sa->rspi; + ikev2_sa_free_all_vec (sa); + uword *p = hash_get (tkm->sa_by_rspi, rspi); + if (p) + { + hash_unset (tkm->sa_by_rspi, rspi); + pool_put (tkm->sas, sa); + } +} + +static void +ikev2_cleanup_profile_sessions (ikev2_main_t * km, ikev2_profile_t * p) +{ + ikev2_main_per_thread_data_t *tkm; + ikev2_sa_t *sa; + u32 pi = p - km->profiles; + u32 *sai; + u32 *del_sai = 0; + + vec_foreach (tkm, km->per_thread_data) + { + /* *INDENT-OFF* */ + pool_foreach (sa, tkm->sas, ({ + if (sa->profile_index != ~0 && pi == sa->profile_index) + vec_add1 (del_sai, sa - tkm->sas); + })); + /* *INDENT-ON* */ + + vec_foreach (sai, del_sai) + { + sa = pool_elt_at_index (tkm->sas, sai[0]); + ikev2_initiate_delete_ike_sa_internal (km->vlib_main, tkm, sa); + } + + vec_reset_length (del_sai); + } + + vec_free (del_sai); +} + +clib_error_t * +ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add) +{ + ikev2_main_t *km = &ikev2_main; + ikev2_profile_t *p; + + if (is_add) + { + if (ikev2_profile_index_by_name (name)) + return clib_error_return (0, "policy %v already exists", name); + + pool_get (km->profiles, p); + clib_memset (p, 0, sizeof (*p)); + p->name = vec_dup (name); + p->ipsec_over_udp_port = IPSEC_UDP_PORT_NONE; + p->responder.sw_if_index = ~0; + p->tun_itf = ~0; + uword index = p - km->profiles; + mhash_set_mem (&km->profile_index_by_name, name, &index, 0); + } + else + { + p = ikev2_profile_index_by_name (name); + if (!p) return clib_error_return (0, "policy %v does not exists", name); + ikev2_unregister_udp_port (p); + ikev2_cleanup_profile_sessions (km, p); + vec_free (p->name); pool_put (km->profiles, p); mhash_unset (&km->profile_index_by_name, name, 0); @@ -2904,9 +3411,9 @@ ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method, vec_add1 (p->auth.data, 0); if (p->auth.key) EVP_PKEY_free (p->auth.key); - p->auth.key = ikev2_load_cert_file (auth_data); + p->auth.key = ikev2_load_cert_file (p->auth.data); if (p->auth.key == NULL) - return clib_error_return (0, "load cert '%s' failed", auth_data); + return clib_error_return (0, "load cert '%s' failed", p->auth.data); } return 0; @@ -3040,7 +3547,6 @@ clib_error_t * ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name, ikev2_transform_encr_type_t crypto_alg, ikev2_transform_integ_type_t integ_alg, - ikev2_transform_dh_type_t dh_type, u32 crypto_key_size) { ikev2_profile_t *p; @@ -3056,11 +3562,79 @@ ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name, p->esp_ts.crypto_alg = crypto_alg; p->esp_ts.integ_alg = integ_alg; - p->esp_ts.dh_type = dh_type; p->esp_ts.crypto_key_size = crypto_key_size; return 0; } +clib_error_t * +ikev2_set_profile_tunnel_interface (vlib_main_t * vm, + u8 * name, 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->tun_itf = sw_if_index; + + return 0; +} + +vnet_api_error_t +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; + + if (is_set) + { + if (p->ipsec_over_udp_port != IPSEC_UDP_PORT_NONE) + return VNET_API_ERROR_VALUE_EXIST; + + rv = ikev2_register_udp_port (p, 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; + + ikev2_unregister_udp_port (p); + } + return rv; +} + +clib_error_t * +ikev2_set_profile_udp_encap (vlib_main_t * vm, u8 * name) +{ + ikev2_profile_t *p = ikev2_profile_index_by_name (name); + clib_error_t *r; + + if (!p) + { + r = clib_error_return (0, "unknown profile %v", name); + return r; + } + + p->udp_encap = 1; + return 0; +} + clib_error_t * ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name, u64 lifetime, u32 jitter, u32 handover, @@ -3123,6 +3697,12 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add); bi0 = ikev2_get_new_ike_header_buff (vm, &ike0); + if (!bi0) + { + char *errmsg = "buffer alloc failure"; + ikev2_log_error (errmsg); + return clib_error_return (0, errmsg); + } /* Prepare the SA and the IKE payload */ ikev2_sa_t sa; @@ -3141,9 +3721,14 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) ikev2_sa_free_proposal_vector (&proposals); sa.is_initiator = 1; - sa.profile_index = km->profiles - p; - sa.is_profile_index_set = 1; + sa.profile_index = p - km->profiles; sa.state = IKEV2_STATE_SA_INIT; + sa.tun_itf = p->tun_itf; + sa.udp_encap = p->udp_encap; + sa.ipsec_over_udp_port = p->ipsec_over_udp_port; + sa.is_tun_itf_set = 1; + sa.initial_contact = 1; + sa.dst_port = IKEV2_PORT; ikev2_generate_sa_init_data (&sa); ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data); ikev2_payload_add_nonce (chain, sa.i_nonce); @@ -3157,29 +3742,21 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi, sizeof (sa.childs[0].i_proposals[0].spi)); - - /* Add NAT detection notification messages (mandatory) */ - u8 nat_detection_source[8 + 8 + 4 + 2]; - u8 *nat_detection_sha1 = vec_new (u8, 20); - - u64 tmpspi = clib_host_to_net_u64 (sa.ispi); - clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi)); - tmpspi = clib_host_to_net_u64 (sa.rspi); - clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi)); - u16 tmpport = clib_host_to_net_u16 (500); - clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport, - sizeof (tmpport)); - u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32); - clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip)); - SHA1 (nat_detection_source, sizeof (nat_detection_source), - nat_detection_sha1); + u8 *nat_detection_sha1 = + ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi), + clib_host_to_net_u64 (sa.rspi), + clib_host_to_net_u32 (if_ip->as_u32), + clib_host_to_net_u16 (IKEV2_PORT)); + ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP, nat_detection_sha1); - tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32); - clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip)); - SHA1 (nat_detection_source, sizeof (nat_detection_source), - nat_detection_sha1); + vec_free (nat_detection_sha1); + nat_detection_sha1 = + ikev2_compute_nat_sha1 (clib_host_to_net_u64 (sa.ispi), + clib_host_to_net_u64 (sa.rspi), + clib_host_to_net_u32 (p->responder.ip4.as_u32), + clib_host_to_net_u16 (sa.dst_port)); ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP, nat_detection_sha1); @@ -3217,20 +3794,29 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) sa.raddr.as_u32 = p->responder.ip4.as_u32; sa.i_id.type = p->loc_id.type; sa.i_id.data = vec_dup (p->loc_id.data); + sa.r_id.type = p->rem_id.type; + sa.r_id.data = vec_dup (p->rem_id.data); sa.i_auth.method = p->auth.method; sa.i_auth.hex = p->auth.hex; sa.i_auth.data = vec_dup (p->auth.data); + sa.sw_if_index = p->responder.sw_if_index; vec_add (sa.childs[0].tsi, &p->loc_ts, 1); vec_add (sa.childs[0].tsr, &p->rem_ts, 1); + ikev2_initial_contact_cleanup (&sa); + /* add SA to the pool */ ikev2_sa_t *sa0 = 0; pool_get (km->sais, sa0); clib_memcpy_fast (sa0, &sa, sizeof (*sa0)); hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais); - ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len); + ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len, + IKEV2_PORT, sa.dst_port, sa.sw_if_index); + ikev2_elog_exchange ("ispi %lx rspi %lx IKEV2_EXCHANGE_SA_INIT sent to " + "%d.%d.%d.%d", clib_host_to_net_u64 (sa0->ispi), 0, + p->responder.ip4.as_u32); } return 0; @@ -3247,7 +3833,11 @@ ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa, int len; bi0 = ikev2_get_new_ike_header_buff (vm, &ike0); - + if (!bi0) + { + ikev2_log_error ("buffer alloc failure"); + return; + } ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL; ike0->ispi = clib_host_to_net_u64 (sa->ispi); @@ -3257,9 +3847,11 @@ ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa, sa->del->spi = csa->i_proposals->spi; ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1); sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid); - len = ikev2_generate_message (sa, ike0, 0); - - ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len); + len = ikev2_generate_message (sa, ike0, 0, 0); + if (sa->natt) + len = ikev2_insert_non_esp_marker (ike0, len); + ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len, + ikev2_get_port (sa), sa->dst_port, sa->sw_if_index); /* delete local child SA */ ikev2_delete_tunnel_interface (km->vnet_main, sa, csa); @@ -3339,46 +3931,7 @@ ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi) return r; } - - /* Create the Initiator notification for IKE SA removal */ - { - ike_header_t *ike0; - u32 bi0 = 0; - int len; - - bi0 = ikev2_get_new_ike_header_buff (vm, &ike0); - - - ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL; - ike0->ispi = clib_host_to_net_u64 (fsa->ispi); - ike0->rspi = clib_host_to_net_u64 (fsa->rspi); - vec_resize (fsa->del, 1); - fsa->del->protocol_id = IKEV2_PROTOCOL_IKE; - fsa->del->spi = ispi; - ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1); - fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid); - len = ikev2_generate_message (fsa, ike0, 0); - - ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len); - } - - - /* delete local SA */ - ikev2_child_sa_t *c; - vec_foreach (c, fsa->childs) - { - ikev2_delete_tunnel_interface (km->vnet_main, fsa, c); - ikev2_sa_del_child_sa (fsa, c); - } - ikev2_sa_free_all_vec (fsa); - uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi); - if (p) - { - hash_unset (ftkm->sa_by_rspi, fsa->rspi); - pool_put (ftkm->sas, fsa); - } - - + ikev2_initiate_delete_ike_sa_internal (vm, ftkm, fsa); return 0; } @@ -3391,9 +3944,12 @@ ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa, u32 bi0 = 0; int len; - bi0 = ikev2_get_new_ike_header_buff (vm, &ike0); - + if (!bi0) + { + ikev2_log_error ("buffer alloc failure"); + return; + } ike0->version = IKE_VERSION_2; ike0->flags = IKEV2_HDR_FLAG_INITIATOR; @@ -3411,8 +3967,11 @@ ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa, RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi)); rekey->spi = proposals[0].spi; rekey->ispi = csa->i_proposals->spi; - len = ikev2_generate_message (sa, ike0, proposals); - ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len); + len = ikev2_generate_message (sa, ike0, proposals, 0); + if (sa->natt) + len = ikev2_insert_non_esp_marker (ike0, len); + ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len, + ikev2_get_port (sa), ikev2_get_port (sa), sa->sw_if_index); vec_free (proposals); } @@ -3467,36 +4026,59 @@ ikev2_init (vlib_main_t * vm) km->vnet_main = vnet_get_main (); km->vlib_main = vm; + km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK; + km->liveness_max_retries = IKEV2_LIVENESS_RETRIES; ikev2_crypto_init (km); mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword)); - vec_validate (km->per_thread_data, tm->n_vlib_mains - 1); - for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++) + vec_validate_aligned (km->per_thread_data, tm->n_vlib_mains - 1, + CLIB_CACHE_LINE_BYTES); + for (thread_id = 0; thread_id < tm->n_vlib_mains; thread_id++) { - km->per_thread_data[thread_id].sa_by_rspi = - hash_create (0, sizeof (uword)); + ikev2_main_per_thread_data_t *ptd = + vec_elt_at_index (km->per_thread_data, thread_id); + + ptd->sa_by_rspi = hash_create (0, sizeof (uword)); + +#if OPENSSL_VERSION_NUMBER >= 0x10100000L + ptd->evp_ctx = EVP_CIPHER_CTX_new (); + ptd->hmac_ctx = HMAC_CTX_new (); +#else + EVP_CIPHER_CTX_init (&ptd->_evp_ctx); + ptd->evp_ctx = &ptd->_evp_ctx; + HMAC_CTX_init (&(ptd->_hmac_ctx)); + ptd->hmac_ctx = &ptd->_hmac_ctx; +#endif } 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, 500, ikev2_node.index, 1); + udp_register_dst_port (vm, IKEV2_PORT, ikev2_node.index, 1); + udp_register_dst_port (vm, IKEV2_PORT_NATT, ikev2_node.index, 1); + vlib_punt_hdl_t punt_hdl = vlib_punt_client_register ("ikev2"); + vlib_punt_register (punt_hdl, ipsec_punt_reason[IPSEC_PUNT_IP4_SPI_UDP_0], + "ikev2"); ikev2_cli_reference (); + 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"), + .runs_after = VLIB_INITS("ipsec_init", "ipsec_punt_init"), }; /* *INDENT-ON* */ - static u8 -ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa) +ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa, + u8 del_old_ids) { ikev2_main_t *km = &ikev2_main; ikev2_profile_t *p = 0; @@ -3504,7 +4086,7 @@ ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa) f64 now = vlib_time_now (vm); u8 res = 0; - if (sa->is_profile_index_set) + if (sa->profile_index != ~0) p = pool_elt_at_index (km->profiles, sa->profile_index); if (sa->is_initiator && p && csa->time_to_expiration @@ -3522,8 +4104,8 @@ ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa) else if (csa->rekey_retries > 0) { csa->rekey_retries--; - clib_warning ("Rekeying Child SA 0x%x, retries left %d", - csa->i_proposals->spi, csa->rekey_retries); + ikev2_log_debug ("Rekeying Child SA 0x%x, retries left %d", + csa->i_proposals->spi, csa->rekey_retries); if (csa->rekey_retries == 0) { csa->rekey_retries = -1; @@ -3536,12 +4118,85 @@ ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa) csa->time_to_expiration = 0; ikev2_delete_child_sa_internal (vm, sa, csa); res |= 1; + return res; + } + } + + if (del_old_ids) + { + ipip_tunnel_t *ipip = NULL; + u32 sw_if_index = sa->is_tun_itf_set ? sa->tun_itf : ~0; + if (~0 == sw_if_index) + { + ip46_address_t local_ip; + ip46_address_t remote_ip; + if (sa->is_initiator) + { + ip46_address_set_ip4 (&local_ip, &sa->iaddr); + ip46_address_set_ip4 (&remote_ip, &sa->raddr); + } + else + { + ip46_address_set_ip4 (&local_ip, &sa->raddr); + ip46_address_set_ip4 (&remote_ip, &sa->iaddr); + } + + /* *INDENT-OFF* */ + ipip_tunnel_key_t key = { + .src = local_ip, + .dst = remote_ip, + .transport = IPIP_TRANSPORT_IP4, + .fib_index = 0, + }; + /* *INDENT-ON* */ + + ipip = ipip_tunnel_db_find (&key); + + if (ipip) + sw_if_index = ipip->sw_if_index; + else + return res; } + + u32 *sas_in = NULL; + vec_add1 (sas_in, csa->remote_sa_id); + vlib_worker_thread_barrier_sync (vm); + ipsec_tun_protect_update (sw_if_index, NULL, csa->local_sa_id, sas_in); + ipsec_sa_unlock_id (ikev2_flip_alternate_sa_bit (csa->remote_sa_id)); + vlib_worker_thread_barrier_release (vm); } return res; } +int +ikev2_set_log_level (ikev2_log_level_t log_level) +{ + ikev2_main_t *km = &ikev2_main; + + if (log_level >= IKEV2_LOG_MAX) + { + ikev2_log_error ("unknown logging level %d", log_level); + return -1; + } + + km->log_level = log_level; + return 0; +} + +clib_error_t * +ikev2_set_liveness_params (u32 period, u32 max_retries) +{ + ikev2_main_t *km = &ikev2_main; + + if (period == 0 || max_retries == 0) + return clib_error_return (0, "invalid args"); + + km->liveness_period = period; + km->liveness_max_retries = max_retries; + return 0; +} + static void ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa) { @@ -3574,7 +4229,7 @@ ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa) vlib_get_combined_counter (&ipsec_sa_counters, ipsec_sa->stat_index, &counts); - if (fsa && fsa->is_profile_index_set) + if (fsa && fsa->profile_index != ~0 && fsa->is_initiator) p = pool_elt_at_index (km->profiles, fsa->profile_index); if (fchild && p && p->lifetime_maxdata) @@ -3586,14 +4241,111 @@ ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa) } } +static void +ikev2_process_pending_sa_init (ikev2_main_t * km) +{ + u32 sai; + u64 ispi; + ikev2_sa_t *sa; + + /* *INDENT-OFF* */ + hash_foreach (ispi, sai, km->sa_by_ispi, + ({ + sa = pool_elt_at_index (km->sais, sai); + if (sa->init_response_received) + continue; + + u32 bi0; + if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1) + return; + + vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0); + clib_memcpy_fast (vlib_buffer_get_current (b), + sa->last_sa_init_req_packet_data, + vec_len (sa->last_sa_init_req_packet_data)); + ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0, + vec_len (sa->last_sa_init_req_packet_data), + ikev2_get_port (sa), IKEV2_PORT, sa->sw_if_index); + })); + /* *INDENT-ON* */ +} + static vlib_node_registration_t ikev2_mngr_process_node; +static void +ikev2_send_informational_request (ikev2_sa_t * sa) +{ + ikev2_main_t *km = &ikev2_main; + ip4_address_t *src, *dst; + ike_header_t *ike0; + u32 bi0 = 0; + u16 dp; + int len; + + bi0 = ikev2_get_new_ike_header_buff (km->vlib_main, &ike0); + if (!bi0) + { + ikev2_log_error ("buffer alloc failure"); + return; + } + + ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL; + ike0->ispi = clib_host_to_net_u64 (sa->ispi); + ike0->rspi = clib_host_to_net_u64 (sa->rspi); + ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1); + sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid); + len = ikev2_generate_message (sa, ike0, 0, 0); + if (sa->natt) + len = ikev2_insert_non_esp_marker (ike0, len); + + if (sa->is_initiator) + { + src = &sa->iaddr; + dst = &sa->raddr; + } + else + { + dst = &sa->iaddr; + src = &sa->raddr; + } + + dp = sa->dst_port ? sa->dst_port : ikev2_get_port (sa); + ikev2_send_ike (km->vlib_main, src, dst, bi0, len, ikev2_get_port (sa), dp, + sa->sw_if_index); +} + +static_always_inline int +ikev2_mngr_process_responder_sas (ikev2_sa_t * sa) +{ + ikev2_main_t *km = &ikev2_main; + vlib_main_t *vm = km->vlib_main; + + if (!sa->sk_ai || !sa->sk_ar) + return 0; + + if (sa->liveness_retries >= km->liveness_max_retries) + return 1; + + f64 now = vlib_time_now (vm); + + if (sa->liveness_period_check < now) + { + sa->liveness_retries++; + sa->liveness_period_check = now + km->liveness_period; + ikev2_send_informational_request (sa); + } + return 0; +} + static uword 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; while (1) { @@ -3606,15 +4358,53 @@ ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt, vec_foreach (tkm, km->per_thread_data) { ikev2_sa_t *sa; + u32 *to_be_deleted = 0; + /* *INDENT-OFF* */ pool_foreach (sa, tkm->sas, ({ ikev2_child_sa_t *c; + u8 del_old_ids = 0; + if (sa->old_remote_id_present && 0 > sa->old_id_expiration) + { + sa->old_remote_id_present = 0; + del_old_ids = 1; + } + else + sa->old_id_expiration -= 1; + vec_foreach (c, sa->childs) { - req_sent |= ikev2_mngr_process_child_sa(sa, c); + req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids); } + + if (ikev2_mngr_process_responder_sas (sa)) + vec_add1 (to_be_deleted, sa - tkm->sas); })); /* *INDENT-ON* */ + + vec_foreach (sai, to_be_deleted) + { + sa = pool_elt_at_index (tkm->sas, sai[0]); + u8 reinitiate = (sa->is_initiator && sa->profile_index != ~0); + vec_foreach (c, sa->childs) + { + ikev2_delete_tunnel_interface (km->vnet_main, sa, c); + ikev2_sa_del_child_sa (sa, c); + } + ikev2_sa_free_all_vec (sa); + hash_unset (tkm->sa_by_rspi, sa->rspi); + pool_put (tkm->sas, sa); + + if (reinitiate) + { + p = pool_elt_at_index (km->profiles, sa->profile_index); + if (p) + { + ikev2_initiate_sa_init (vm, p->name); + } + } + } + vec_free (to_be_deleted); } /* process ipsec sas */ @@ -3625,6 +4415,8 @@ ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt, })); /* *INDENT-ON* */ + ikev2_process_pending_sa_init (km); + if (req_sent) { vlib_process_wait_for_event_or_clock (vm, 5);