diff options
Diffstat (limited to 'src/vnet/ipsec/ikev2.c')
| -rw-r--r-- | src/vnet/ipsec/ikev2.c | 1548 |
1 files changed, 1397 insertions, 151 deletions
diff --git a/src/vnet/ipsec/ikev2.c b/src/vnet/ipsec/ikev2.c index 5a6c3674477..092093346fd 100644 --- a/src/vnet/ipsec/ikev2.c +++ b/src/vnet/ipsec/ikev2.c @@ -21,6 +21,7 @@ #include <vnet/ipsec/ipsec.h> #include <vnet/ipsec/ikev2.h> #include <vnet/ipsec/ikev2_priv.h> +#include <openssl/sha.h> static int ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa, @@ -202,13 +203,15 @@ ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p, } ikev2_child_sa_t * -ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id) +ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id, + int by_initiator) { ikev2_child_sa_t *c; vec_foreach (c, sa->childs) { - if (c->i_proposals[0].spi == spi - && c->i_proposals[0].protocol_id == prot_id) + ikev2_sa_proposal_t *proposal = + by_initiator ? &c->i_proposals[0] : &c->r_proposals[0]; + if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id) return c; } @@ -271,6 +274,7 @@ ikev2_sa_free_all_vec (ikev2_sa_t * sa) vec_free (sa->i_nonce); vec_free (sa->i_dh_data); vec_free (sa->dh_shared_key); + vec_free (sa->dh_private_key); ikev2_sa_free_proposal_vector (&sa->r_proposals); ikev2_sa_free_proposal_vector (&sa->i_proposals); @@ -341,15 +345,84 @@ ikev2_generate_sa_init_data (ikev2_sa_t * sa) return; } - /* generate rspi */ - RAND_bytes ((u8 *) & sa->rspi, 8); + if (sa->is_initiator) + { + /* generate rspi */ + RAND_bytes ((u8 *) & sa->ispi, 8); + + /* generate nonce */ + sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE); + RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE); + } + else + { + /* generate rspi */ + RAND_bytes ((u8 *) & sa->rspi, 8); - /* generate nonce */ - sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE); - RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE); + /* generate nonce */ + sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE); + RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE); + } /* generate dh keys */ ikev2_generate_dh (sa, t); + +} + +static void +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); + sa->i_dh_data = _(sai->i_dh_data); + sa->dh_private_key = _(sai->dh_private_key); + sa->iaddr.as_u32 = sai->iaddr.as_u32; + sa->raddr.as_u32 = sai->raddr.as_u32; + sa->is_initiator = sai->is_initiator; + sa->profile = sai->profile; + sa->i_id.type = sai->i_id.type; + sa->i_id.data = _(sai->i_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); +#undef _ + + + if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE) + { + return; + } + + /* check if received DH group is on our list of supported groups */ + vec_foreach (t2, km->supported_transforms) + { + if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type) + { + t = t2; + break; + } + } + + 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; + } + + + /* generate dh keys */ + ikev2_complete_dh (sa, t); + } static void @@ -551,6 +624,86 @@ ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa, ikev2_set_state (sa, IKEV2_STATE_SA_INIT); } +static void +ikev2_process_sa_init_resp (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; + + 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); + + /* 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); + + while (p < len && payload != IKEV2_PAYLOAD_NONE) + { + ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p]; + u32 plen = clib_net_to_host_u16 (ikep->length); + + if (plen < sizeof (ike_payload_header_t)) + return; + + if (payload == IKEV2_PAYLOAD_SA) + { + ikev2_sa_free_proposal_vector (&sa->r_proposals); + sa->r_proposals = ikev2_parse_sa_payload (ikep); + if (sa->r_proposals) + { + ikev2_set_state (sa, IKEV2_STATE_SA_INIT); + ike->msgid = + clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1); + } + } + else if (payload == IKEV2_PAYLOAD_KE) + { + ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep; + sa->dh_group = clib_net_to_host_u16 (ke->dh_group); + vec_free (sa->r_dh_data); + vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke)); + } + else if (payload == IKEV2_PAYLOAD_NONCE) + { + vec_free (sa->r_nonce); + vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep)); + } + else if (payload == IKEV2_PAYLOAD_NOTIFY) + { + ikev2_notify_t *n = ikev2_parse_notify_payload (ikep); + vec_free (n); + } + else if (payload == IKEV2_PAYLOAD_VENDOR) + { + ikev2_parse_vendor_payload (ikep); + } + else + { + clib_warning ("unknown payload %u flags %x length %u", payload, + ikep->flags, plen); + if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) + { + ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE); + sa->unsupported_cp = payload; + return; + } + } + + payload = ikep->nextpayload; + p += plen; + } +} + static u8 * ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload) { @@ -599,8 +752,9 @@ ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload) return 0; } - hmac = ikev2_calc_integr (tr_integ, sa->sk_ai, (u8 *) ike, - len - tr_integ->key_trunc); + hmac = + ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai, + (u8 *) ike, len - tr_integ->key_trunc); plen = plen - sizeof (*ikep) - tr_integ->key_trunc; @@ -683,9 +837,16 @@ ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike) goto cleanup_and_exit; } - /* create 1st child SA */ - ikev2_sa_free_all_child_sa (&sa->childs); - vec_add2 (sa->childs, first_child_sa, 1); + /* select or create 1st child SA */ + if (sa->is_initiator) + { + first_child_sa = &sa->childs[0]; + } + else + { + ikev2_sa_free_all_child_sa (&sa->childs); + vec_add2 (sa->childs, first_child_sa, 1); + } /* process encrypted payload */ @@ -701,27 +862,54 @@ 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)); - ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals); - first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep); + if (sa->is_initiator) + { + ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals); + first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep); + } + else + { + ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals); + first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep); + } } - else if (payload == IKEV2_PAYLOAD_IDI) /* 35 */ + else if (payload == IKEV2_PAYLOAD_IDI || payload == IKEV2_PAYLOAD_IDR) /* 35, 36 */ { ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep; - sa->i_id.type = id->id_type; - vec_free (sa->i_id.data); - vec_add (sa->i_id.data, id->payload, plen - sizeof (*id)); + if (sa->is_initiator) + { + sa->r_id.type = id->id_type; + vec_free (sa->r_id.data); + vec_add (sa->r_id.data, id->payload, plen - sizeof (*id)); + } + else + { + 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", + clib_warning ("received payload %s, len %u id_type %u", + (payload == IKEV2_PAYLOAD_IDI ? "IDi" : "IDr"), plen - sizeof (*id), id->id_type); } else if (payload == IKEV2_PAYLOAD_AUTH) /* 39 */ { ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep; - sa->i_auth.method = a->auth_method; - vec_free (sa->i_auth.data); - vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a)); + if (sa->is_initiator) + { + sa->r_auth.method = a->auth_method; + vec_free (sa->r_auth.data); + vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a)); + } + else + { + sa->i_auth.method = a->auth_method; + 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); @@ -857,7 +1045,7 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, u8 payload = ike->nextpayload; u8 *plaintext = 0; u8 rekeying = 0; - u8 i_nonce[IKEV2_NONCE_SIZE]; + u8 nonce[IKEV2_NONCE_SIZE]; ike_payload_header_t *ikep; u32 plen; @@ -912,7 +1100,7 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, } else if (payload == IKEV2_PAYLOAD_NONCE) { - clib_memcpy (i_nonce, ikep->payload, plen - sizeof (*ikep)); + clib_memcpy (nonce, ikep->payload, plen - sizeof (*ikep)); } else if (payload == IKEV2_PAYLOAD_TSI) { @@ -939,10 +1127,29 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, p += plen; } - if (rekeying) + if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP) + { + ikev2_rekey_t *rekey = &sa->rekey[0]; + rekey->protocol_id = proposal->protocol_id; + rekey->i_proposal = + ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP); + rekey->i_proposal->spi = rekey->spi; + rekey->r_proposal = proposal; + rekey->tsi = tsi; + rekey->tsr = tsr; + /* update Nr */ + vec_free (sa->r_nonce); + vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE); + child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1); + if (child_sa) + { + child_sa->rekey_retries = 0; + } + } + else if (rekeying) { ikev2_rekey_t *rekey; - child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id); + 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); @@ -958,7 +1165,7 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa, rekey->tsr = tsr; /* update Ni */ vec_free (sa->i_nonce); - vec_add (sa->i_nonce, i_nonce, IKEV2_NONCE_SIZE); + vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE); /* generate new Nr */ vec_free (sa->r_nonce); sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE); @@ -1030,20 +1237,34 @@ ikev2_sa_match_ts (ikev2_sa_t * sa) { ikev2_main_t *km = &ikev2_main; ikev2_profile_t *p; - ikev2_ts_t *ts, *tsi = 0, *tsr = 0; + ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0; + ikev2_id_t *id; /* *INDENT-OFF* */ pool_foreach (p, km->profiles, ({ + if (sa->is_initiator) + { + p_tsi = &p->loc_ts; + p_tsr = &p->rem_ts; + id = &sa->r_id; + } + else + { + p_tsi = &p->rem_ts; + p_tsr = &p->loc_ts; + id = &sa->i_id; + } + /* check id */ - if (p->rem_id.type != sa->i_id.type || - vec_len(p->rem_id.data) != vec_len(sa->i_id.data) || - memcmp(p->rem_id.data, sa->i_id.data, vec_len(p->rem_id.data))) + 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))) continue; vec_foreach(ts, sa->childs[0].tsi) { - if (ikev2_ts_cmp(&p->rem_ts, ts)) + if (ikev2_ts_cmp(p_tsi, ts)) { tsi = vec_dup(ts); break; @@ -1052,7 +1273,7 @@ ikev2_sa_match_ts (ikev2_sa_t * sa) vec_foreach(ts, sa->childs[0].tsr) { - if (ikev2_ts_cmp(&p->loc_ts, ts)) + if (ikev2_ts_cmp(p_tsr, ts)) { tsr = vec_dup(ts); break; @@ -1100,18 +1321,32 @@ ikev2_sa_auth (ikev2_sa_t * sa) } key_pad = format (0, "%s", IKEV2_KEY_PAD); - authmsg = ikev2_sa_generate_authmsg (sa, 0); + authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator); + + ikev2_id_t *sa_id; + ikev2_auth_t *sa_auth; + + if (sa->is_initiator) + { + sa_id = &sa->r_id; + sa_auth = &sa->r_auth; + } + else + { + sa_id = &sa->i_id; + sa_auth = &sa->i_auth; + } /* *INDENT-OFF* */ pool_foreach (p, km->profiles, ({ /* check id */ - if (p->rem_id.type != sa->i_id.type || - vec_len(p->rem_id.data) != vec_len(sa->i_id.data) || - memcmp(p->rem_id.data, sa->i_id.data, vec_len(p->rem_id.data))) + 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))) continue; - if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) + if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) { if (!p->auth.data || p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC) @@ -1120,7 +1355,7 @@ ikev2_sa_auth (ikev2_sa_t * sa) psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad); auth = ikev2_calc_prf(tr_prf, psk, authmsg); - if (!memcmp(auth, sa->i_auth.data, vec_len(sa->i_auth.data))) + if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data))) { ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED); vec_free(auth); @@ -1129,12 +1364,12 @@ ikev2_sa_auth (ikev2_sa_t * sa) } } - else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG) + 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->i_auth.data, authmsg) == 1) + if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1) { ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED); sel_p = p; @@ -1151,28 +1386,32 @@ ikev2_sa_auth (ikev2_sa_t * sa) if (sa->state == IKEV2_STATE_AUTHENTICATED) { - 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; - - /* generate our auth data */ - authmsg = ikev2_sa_generate_authmsg (sa, 1); - if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) + if (!sa->is_initiator) { - sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg); - sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC; - } - else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG) - { - sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg); - sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG; - } - vec_free (authmsg); + 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; + + /* generate our auth data */ + authmsg = ikev2_sa_generate_authmsg (sa, 1); + if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) + { + sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg); + sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC; + } + else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG) + { + sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg); + sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG; + } + vec_free (authmsg); - /* select transforms for 1st child sa */ - ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals); - sa->childs[0].r_proposals = - ikev2_select_proposal (sa->childs[0].i_proposals, IKEV2_PROTOCOL_ESP); + /* select transforms for 1st child sa */ + ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals); + sa->childs[0].r_proposals = + ikev2_select_proposal (sa->childs[0].i_proposals, + IKEV2_PROTOCOL_ESP); + } } else { @@ -1182,12 +1421,58 @@ ikev2_sa_auth (ikev2_sa_t * sa) vec_free (key_pad); } + +static void +ikev2_sa_auth_init (ikev2_sa_t * sa) +{ + ikev2_main_t *km = &ikev2_main; + 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)) + { + clib_warning ("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, 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) + { + sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg); + sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC; + } + else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG) + { + 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 (auth); + vec_free (authmsg); +} + + static int ikev2_create_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa, ikev2_child_sa_t * child) { ipsec_add_del_tunnel_args_t a; ikev2_sa_transform_t *tr; + ikev2_sa_proposal_t *proposals; u8 encr_type = 0; if (!child->r_proposals) @@ -1198,21 +1483,31 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa, memset (&a, 0, sizeof (a)); a.is_add = 1; - a.local_ip.as_u32 = sa->raddr.as_u32; - a.remote_ip.as_u32 = sa->iaddr.as_u32; - a.local_spi = child->i_proposals[0].spi; - a.remote_spi = child->r_proposals[0].spi; + if (sa->is_initiator) + { + a.local_ip.as_u32 = sa->iaddr.as_u32; + a.remote_ip.as_u32 = sa->raddr.as_u32; + proposals = child->i_proposals; + a.local_spi = child->r_proposals[0].spi; + a.remote_spi = child->i_proposals[0].spi; + } + else + { + a.local_ip.as_u32 = sa->raddr.as_u32; + a.remote_ip.as_u32 = sa->iaddr.as_u32; + proposals = child->r_proposals; + a.local_spi = child->i_proposals[0].spi; + a.remote_spi = child->r_proposals[0].spi; + } a.anti_replay = 1; - tr = - ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ESN); + tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN); if (tr) a.esn = tr->esn_type; else a.esn = 0; - tr = - ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR); + tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR); if (tr) { if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len) @@ -1246,8 +1541,7 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa, return 1; } - tr = - ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG); + tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG); if (tr) { if (tr->integ_type != IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96) @@ -1264,17 +1558,44 @@ ikev2_create_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa, ikev2_calc_child_keys (sa, child); + u8 *loc_ckey, *rem_ckey, *loc_ikey, *rem_ikey; + if (sa->is_initiator) + { + loc_ikey = child->sk_ai; + rem_ikey = child->sk_ar; + loc_ckey = child->sk_ei; + rem_ckey = child->sk_er; + } + else + { + loc_ikey = child->sk_ar; + rem_ikey = child->sk_ai; + loc_ckey = child->sk_er; + rem_ckey = child->sk_ei; + } + a.integ_alg = IPSEC_INTEG_ALG_SHA1_96; - a.local_integ_key_len = vec_len (child->sk_ar); - clib_memcpy (a.local_integ_key, child->sk_ar, a.local_integ_key_len); - a.remote_integ_key_len = vec_len (child->sk_ai); - clib_memcpy (a.remote_integ_key, child->sk_ai, a.remote_integ_key_len); + a.local_integ_key_len = vec_len (loc_ikey); + clib_memcpy (a.local_integ_key, loc_ikey, a.local_integ_key_len); + a.remote_integ_key_len = vec_len (rem_ikey); + clib_memcpy (a.remote_integ_key, rem_ikey, a.remote_integ_key_len); a.crypto_alg = encr_type; - a.local_crypto_key_len = vec_len (child->sk_er); - clib_memcpy (a.local_crypto_key, child->sk_er, a.local_crypto_key_len); - a.remote_crypto_key_len = vec_len (child->sk_ei); - clib_memcpy (a.remote_crypto_key, child->sk_ei, a.remote_crypto_key_len); + a.local_crypto_key_len = vec_len (loc_ckey); + clib_memcpy (a.local_crypto_key, loc_ckey, a.local_crypto_key_len); + a.remote_crypto_key_len = vec_len (rem_ckey); + clib_memcpy (a.remote_crypto_key, rem_ckey, a.remote_crypto_key_len); + + if (sa->profile && sa->profile->lifetime) + { + child->time_to_expiration = vlib_time_now (vnm->vlib_main) + + sa->profile->lifetime; + if (sa->profile->lifetime_jitter) + { + child->time_to_expiration += + 1 + (rand () % sa->profile->lifetime_jitter); + } + } ipsec_add_del_tunnel_if (&a); @@ -1287,21 +1608,35 @@ ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa, { ipsec_add_del_tunnel_args_t a; - if (!vec_len (child->r_proposals)) - return 0; + if (sa->is_initiator) + { + if (!vec_len (child->i_proposals)) + return 0; - a.is_add = 0; - a.local_ip.as_u32 = sa->raddr.as_u32; - a.remote_ip.as_u32 = sa->iaddr.as_u32; - a.local_spi = child->i_proposals[0].spi; - a.remote_spi = child->r_proposals[0].spi; + a.is_add = 0; + a.local_ip.as_u32 = sa->iaddr.as_u32; + a.remote_ip.as_u32 = sa->raddr.as_u32; + a.local_spi = child->r_proposals[0].spi; + a.remote_spi = child->i_proposals[0].spi; + } + else + { + if (!vec_len (child->r_proposals)) + return 0; + + a.is_add = 0; + a.local_ip.as_u32 = sa->raddr.as_u32; + a.remote_ip.as_u32 = sa->iaddr.as_u32; + a.local_spi = child->i_proposals[0].spi; + a.remote_spi = child->r_proposals[0].spi; + } ipsec_add_del_tunnel_if (&a); return 0; } static u32 -ikev2_generate_resp (ikev2_sa_t * sa, ike_header_t * ike) +ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) { v8 *integ = 0; ike_payload_header_t *ph; @@ -1404,6 +1739,14 @@ ikev2_generate_resp (ikev2_sa_t * sa, ike_header_t * ike) data); vec_free (data); } + else if (sa->state == IKEV2_STATE_SA_INIT) + { + ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI); + 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); + } else { ikev2_set_state (sa, IKEV2_STATE_DELETED); @@ -1415,10 +1758,13 @@ ikev2_generate_resp (ikev2_sa_t * sa, ike_header_t * ike) /* if pending delete */ if (sa->del) { - /* The response to a request that deletes the IKE SA is an empty - INFORMATIONAL response. */ if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE) { + if (sa->is_initiator) + ikev2_payload_add_delete (chain, sa->del); + + /* The response to a request that deletes the IKE SA is an empty + INFORMATIONAL response. */ ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE); } /* The response to a request that deletes ESP or AH SAs will contain @@ -1452,37 +1798,71 @@ ikev2_generate_resp (ikev2_sa_t * sa, ike_header_t * ike) } else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA) { - if (sa->rekey) - { - ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal); - ikev2_payload_add_nonce (chain, sa->r_nonce); - ikev2_payload_add_ts (chain, sa->rekey[0].tsi, IKEV2_PAYLOAD_TSI); - ikev2_payload_add_ts (chain, sa->rekey[0].tsr, IKEV2_PAYLOAD_TSR); - vec_del1 (sa->rekey, 0); - } - else if (sa->unsupported_cp) + if (sa->is_initiator) { - u8 *data = vec_new (u8, 1); - data[0] = sa->unsupported_cp; - ikev2_payload_add_notify (chain, - IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD, - data); + ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user; + ikev2_notify_t notify; + u8 *data = vec_new (u8, 4); + memset (¬ify, 0, sizeof (notify)); + notify.protocol_id = IKEV2_PROTOCOL_ESP; + notify.spi = sa->childs[0].i_proposals->spi; + *(u32 *) data = clib_host_to_net_u32 (notify.spi); + + ikev2_payload_add_sa (chain, proposals); + ikev2_payload_add_nonce (chain, sa->i_nonce); + 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_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data, + ¬ify); + vec_free (data); - sa->unsupported_cp = 0; } else { - ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS, - 0); + if (sa->rekey) + { + ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal); + ikev2_payload_add_nonce (chain, sa->r_nonce); + ikev2_payload_add_ts (chain, sa->rekey[0].tsi, + IKEV2_PAYLOAD_TSI); + ikev2_payload_add_ts (chain, sa->rekey[0].tsr, + IKEV2_PAYLOAD_TSR); + vec_del1 (sa->rekey, 0); + } + else if (sa->unsupported_cp) + { + u8 *data = vec_new (u8, 1); + + data[0] = sa->unsupported_cp; + ikev2_payload_add_notify (chain, + IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD, + data); + vec_free (data); + sa->unsupported_cp = 0; + } + else + { + ikev2_payload_add_notify (chain, + IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS, + 0); + } } } /* IKEv2 header */ ike->version = IKE_VERSION_2; - ike->flags = IKEV2_HDR_FLAG_RESPONSE; ike->nextpayload = IKEV2_PAYLOAD_SK; tlen = sizeof (*ike); + if (sa->is_initiator) + { + ike->flags = IKEV2_HDR_FLAG_INITIATOR; + sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid); + } + else + { + ike->flags = IKEV2_HDR_FLAG_RESPONSE; + } if (ike->exchange == IKEV2_EXCHANGE_SA_INIT) @@ -1518,8 +1898,9 @@ ikev2_generate_resp (ikev2_sa_t * sa, ike_header_t * ike) ike->length = clib_host_to_net_u32 (tlen); /* calc integrity data for whole packet except hash itself */ - integ = ikev2_calc_integr (tr_integ, sa->sk_ar, (u8 *) ike, - tlen - tr_integ->key_trunc); + integ = + ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar, + (u8 *) ike, tlen - tr_integ->key_trunc); clib_memcpy (ike->payload + tlen - tr_integ->key_trunc - sizeof (*ike), integ, tr_integ->key_trunc); @@ -1708,43 +2089,81 @@ ikev2_node_fn (vlib_main_t * vm, sa0 = &sa; memset (sa0, 0, sizeof (*sa0)); - if (ike0->rspi == 0) + if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR) { - sa0->raddr.as_u32 = ip40->dst_address.as_u32; - sa0->iaddr.as_u32 = ip40->src_address.as_u32; - - r = ikev2_retransmit_sa_init (ike0, sa0->iaddr, sa0->raddr); - if (r == 1) + if (ike0->rspi == 0) { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT, - 1); - len = clib_net_to_host_u32 (ike0->length); - goto dispatch0; - } - else if (r == -1) - { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_IKE_SA_INIT_IGNORE, - 1); - goto dispatch0; - } + sa0->raddr.as_u32 = ip40->dst_address.as_u32; + sa0->iaddr.as_u32 = ip40->src_address.as_u32; + + r = ikev2_retransmit_sa_init (ike0, sa0->iaddr, + sa0->raddr); + if (r == 1) + { + vlib_node_increment_counter (vm, ikev2_node.index, + IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT, + 1); + len = clib_net_to_host_u32 (ike0->length); + goto dispatch0; + } + else if (r == -1) + { + vlib_node_increment_counter (vm, ikev2_node.index, + IKEV2_ERROR_IKE_SA_INIT_IGNORE, + 1); + goto dispatch0; + } - ikev2_process_sa_init_req (vm, sa0, ike0); + ikev2_process_sa_init_req (vm, sa0, ike0); - if (sa0->state == IKEV2_STATE_SA_INIT) - { - ikev2_sa_free_proposal_vector (&sa0->r_proposals); - sa0->r_proposals = - ikev2_select_proposal (sa0->i_proposals, - IKEV2_PROTOCOL_IKE); - ikev2_generate_sa_init_data (sa0); + if (sa0->state == IKEV2_STATE_SA_INIT) + { + ikev2_sa_free_proposal_vector (&sa0->r_proposals); + sa0->r_proposals = + ikev2_select_proposal (sa0->i_proposals, + IKEV2_PROTOCOL_IKE); + ikev2_generate_sa_init_data (sa0); + } + + if (sa0->state == IKEV2_STATE_SA_INIT + || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE) + { + len = ikev2_generate_message (sa0, ike0, 0); + } + + if (sa0->state == IKEV2_STATE_SA_INIT) + { + /* add SA to the pool */ + pool_get (km->per_thread_data[cpu_index].sas, sa0); + clib_memcpy (sa0, &sa, sizeof (*sa0)); + hash_set (km->per_thread_data[cpu_index].sa_by_rspi, + sa0->rspi, + sa0 - km->per_thread_data[cpu_index].sas); + } + else + { + ikev2_sa_free_all_vec (sa0); + } } + } + else + { + ikev2_process_sa_init_resp (vm, sa0, ike0); - if (sa0->state == IKEV2_STATE_SA_INIT || - sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE) + if (sa0->state == IKEV2_STATE_SA_INIT) { - len = ikev2_generate_resp (sa0, ike0); + ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH; + uword *p = hash_get (km->sa_by_ispi, ike0->ispi); + if (p) + { + 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 (sa0->state == IKEV2_STATE_SA_INIT) @@ -1799,7 +2218,23 @@ ikev2_node_fn (vlib_main_t * vm, ikev2_create_tunnel_interface (km->vnet_main, sa0, &sa0->childs[0]); } - len = ikev2_generate_resp (sa0, ike0); + + 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); + } + } + else + { + len = ikev2_generate_message (sa0, ike0, 0); + } } } else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL) @@ -1839,22 +2274,32 @@ ikev2_node_fn (vlib_main_t * vm, { ikev2_child_sa_t *ch_sa; ch_sa = ikev2_sa_get_child (sa0, d->spi, - d->protocol_id); + d->protocol_id, + !sa0->is_initiator); if (ch_sa) { ikev2_delete_tunnel_interface (km->vnet_main, sa0, ch_sa); - vec_add2 (resp, tmp, 1); - tmp->protocol_id = d->protocol_id; - tmp->spi = ch_sa->r_proposals[0].spi; + if (!sa0->is_initiator) + { + vec_add2 (resp, tmp, 1); + tmp->protocol_id = d->protocol_id; + tmp->spi = ch_sa->r_proposals[0].spi; + } ikev2_sa_del_child_sa (sa0, ch_sa); } } - vec_free (sa0->del); - sa0->del = resp; + if (!sa0->is_initiator) + { + vec_free (sa0->del); + sa0->del = resp; + } } } - len = ikev2_generate_resp (sa0, ike0); + if (!sa0->is_initiator) + { + len = ikev2_generate_message (sa0, ike0, 0); + } } } else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA) @@ -1898,7 +2343,14 @@ ikev2_node_fn (vlib_main_t * vm, ikev2_create_tunnel_interface (km->vnet_main, sa0, child); } - len = ikev2_generate_resp (sa0, ike0); + if (sa0->is_initiator) + { + vec_del1 (sa0->rekey, 0); + } + else + { + len = ikev2_generate_message (sa0, ike0, 0); + } } } } @@ -1915,8 +2367,16 @@ ikev2_node_fn (vlib_main_t * vm, if (len) { next0 = IKEV2_NEXT_IP4_LOOKUP; - ip40->dst_address.as_u32 = sa0->iaddr.as_u32; - ip40->src_address.as_u32 = sa0->raddr.as_u32; + if (sa0->is_initiator) + { + ip40->dst_address.as_u32 = sa0->raddr.as_u32; + ip40->src_address.as_u32 = sa0->iaddr.as_u32; + } + else + { + ip40->dst_address.as_u32 = sa0->iaddr.as_u32; + ip40->src_address.as_u32 = sa0->raddr.as_u32; + } udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t)); udp0->checksum = 0; @@ -1979,6 +2439,126 @@ VLIB_REGISTER_NODE (ikev2_node,static) = { /* *INDENT-ON* */ +static clib_error_t * +ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa, + ikev2_transforms_set * ts, + ikev2_sa_proposal_t ** proposals, int is_ike) +{ + clib_error_t *r; + ikev2_main_t *km = &ikev2_main; + ikev2_sa_proposal_t *proposal; + vec_add2 (*proposals, proposal, 1); + ikev2_sa_transform_t *td; + int error; + + /* Encryption */ + error = 1; + vec_foreach (td, km->supported_transforms) + { + if (td->type == IKEV2_TRANSFORM_TYPE_ENCR + && td->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC + && td->key_len == ts->crypto_key_size / 8) + { + u16 attr[2]; + attr[0] = clib_host_to_net_u16 (14 | (1 << 15)); + attr[1] = clib_host_to_net_u16 (td->key_len << 3); + vec_add (td->attrs, (u8 *) attr, 4); + vec_add1 (proposal->transforms, *td); + td->attrs = 0; + + error = 0; + break; + } + } + if (error) + { + r = clib_error_return (0, "Unsupported algorithm"); + return r; + } + + /* Integrity */ + error = 1; + vec_foreach (td, km->supported_transforms) + { + if (td->type == IKEV2_TRANSFORM_TYPE_INTEG + && td->integ_type == IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96) + { + vec_add1 (proposal->transforms, *td); + error = 0; + break; + } + } + if (error) + { + r = clib_error_return (0, "Unsupported algorithm"); + return r; + } + + /* PRF */ + if (is_ike) + { + error = 1; + vec_foreach (td, km->supported_transforms) + { + if (td->type == IKEV2_TRANSFORM_TYPE_PRF + && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA1) + { + vec_add1 (proposal->transforms, *td); + error = 0; + break; + } + } + if (error) + { + r = clib_error_return (0, "Unsupported algorithm"); + return r; + } + } + + /* DH */ + error = 1; + vec_foreach (td, km->supported_transforms) + { + if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type) + { + vec_add1 (proposal->transforms, *td); + if (is_ike) + { + sa->dh_group = td->dh_type; + } + error = 0; + break; + } + } + if (error) + { + r = clib_error_return (0, "Unsupported algorithm"); + return r; + } + + if (!is_ike) + { + error = 1; + vec_foreach (td, km->supported_transforms) + { + if (td->type == IKEV2_TRANSFORM_TYPE_ESN) + { + vec_add1 (proposal->transforms, *td); + error = 0; + break; + } + } + if (error) + { + r = clib_error_return (0, "Unsupported algorithm"); + return r; + } + } + + + return 0; +} + static ikev2_profile_t * ikev2_profile_index_by_name (u8 * name) { @@ -1992,6 +2572,64 @@ ikev2_profile_index_by_name (u8 * name) return pool_elt_at_index (km->profiles, p[0]); } + +static void +ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst, + u32 bi0, u32 len) +{ + ip4_header_t *ip40; + udp_header_t *udp0; + vlib_buffer_t *b0; + vlib_frame_t *f; + u32 *to_next; + + b0 = vlib_get_buffer (vm, bi0); + vlib_buffer_advance (b0, -sizeof (udp_header_t)); + udp0 = vlib_buffer_get_current (b0); + vlib_buffer_advance (b0, -sizeof (ip4_header_t)); + ip40 = vlib_buffer_get_current (b0); + + + ip40->ip_version_and_header_length = 0x45; + ip40->tos = 0; + ip40->fragment_id = 0; + ip40->flags_and_fragment_offset = 0; + ip40->ttl = 0xff; + 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->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); + + + /* send the request */ + f = vlib_get_frame_to_node (vm, ip4_lookup_node.index); + to_next = vlib_frame_vector_args (f); + to_next[0] = bi0; + f->n_vectors = 1; + vlib_put_frame_to_node (vm, ip4_lookup_node.index, f); + +} + +static u32 +ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike) +{ + u32 bi0; + if (vlib_buffer_alloc (vm, &bi0, 1) != 1) + { + *ike = 0; + return 0; + } + vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0); + *ike = vlib_buffer_get_current (b0); + return bi0; +} + clib_error_t * ikev2_set_local_key (vlib_main_t * vm, u8 * file) { @@ -2018,6 +2656,7 @@ ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add) pool_get (km->profiles, p); 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); } @@ -2145,6 +2784,470 @@ ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id, clib_error_t * +ikev2_set_profile_responder (vlib_main_t * vm, u8 * name, + u32 sw_if_index, ip4_address_t ip4) +{ + 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.sw_if_index = sw_if_index; + p->responder.ip4 = ip4; + + return 0; +} + +clib_error_t * +ikev2_set_profile_ike_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; + 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->ike_ts.crypto_alg = crypto_alg; + p->ike_ts.integ_alg = integ_alg; + p->ike_ts.dh_type = dh_type; + p->ike_ts.crypto_key_size = crypto_key_size; + return 0; +} + +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; + 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->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_sa_lifetime (vlib_main_t * vm, u8 * name, + u64 lifetime, u32 jitter, u32 handover, + u64 maxdata) +{ + 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->lifetime = lifetime; + p->lifetime_jitter = jitter; + p->handover = handover; + p->lifetime_maxdata = maxdata; + return 0; +} + +clib_error_t * +ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name) +{ + ikev2_profile_t *p; + clib_error_t *r; + ip4_main_t *im = &ip4_main; + ikev2_main_t *km = &ikev2_main; + + p = ikev2_profile_index_by_name (name); + + if (!p) + { + r = clib_error_return (0, "unknown profile %v", name); + return r; + } + + if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0) + { + r = clib_error_return (0, "responder not set for profile %v", name); + return r; + } + + + /* Create the Initiator Request */ + { + ike_header_t *ike0; + u32 bi0 = 0; + ip_lookup_main_t *lm = &im->lookup_main; + u32 if_add_index0; + int len = sizeof (ike_header_t); + + /* Get own iface IP */ + if_add_index0 = + lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index]; + ip_interface_address_t *if_add = + pool_elt_at_index (lm->if_address_pool, if_add_index0); + ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add); + + bi0 = ikev2_get_new_ike_header_buff (vm, &ike0); + + /* Prepare the SA and the IKE payload */ + ikev2_sa_t sa; + memset (&sa, 0, sizeof (ikev2_sa_t)); + ikev2_payload_chain_t *chain = 0; + ikev2_payload_new_chain (chain); + + /* Build the IKE proposal payload */ + ikev2_sa_proposal_t *proposals = 0; + ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1); + proposals[0].proposal_num = 1; + proposals[0].protocol_id = IKEV2_PROTOCOL_IKE; + + /* Add and then cleanup proposal data */ + ikev2_payload_add_sa (chain, proposals); + ikev2_sa_free_proposal_vector (&proposals); + + sa.is_initiator = 1; + sa.profile = p; + sa.state = IKEV2_STATE_SA_INIT; + 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); + + /* Build the child SA proposal */ + vec_resize (sa.childs, 1); + ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts, + &sa.childs[0].i_proposals, 0); + sa.childs[0].i_proposals[0].proposal_num = 1; + sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP; + 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 (&nat_detection_source[0], &tmpspi, sizeof (tmpspi)); + tmpspi = clib_host_to_net_u64 (sa.rspi); + clib_memcpy (&nat_detection_source[8], &tmpspi, sizeof (tmpspi)); + u16 tmpport = clib_host_to_net_u16 (500); + clib_memcpy (&nat_detection_source[8 + 8 + 4], &tmpport, + sizeof (tmpport)); + u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32); + clib_memcpy (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip)); + SHA1 (nat_detection_source, sizeof (nat_detection_source), + nat_detection_sha1); + 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 (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip)); + SHA1 (nat_detection_source, sizeof (nat_detection_source), + nat_detection_sha1); + ikev2_payload_add_notify (chain, + IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP, + nat_detection_sha1); + vec_free (nat_detection_sha1); + + u8 *sig_hash_algo = vec_new (u8, 8); + u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004); + clib_memcpy (sig_hash_algo, &tmpsig, sizeof (tmpsig)); + ikev2_payload_add_notify (chain, + IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS, + sig_hash_algo); + vec_free (sig_hash_algo); + + + /* Buffer update and bolierplate */ + len += vec_len (chain->data); + ike0->nextpayload = chain->first_payload_type; + ike0->length = clib_host_to_net_u32 (len); + clib_memcpy (ike0->payload, chain->data, vec_len (chain->data)); + ikev2_payload_destroy_chain (chain); + + ike0->version = IKE_VERSION_2; + ike0->flags = IKEV2_HDR_FLAG_INITIATOR; + ike0->exchange = IKEV2_EXCHANGE_SA_INIT; + ike0->ispi = sa.ispi; + + /* store whole IKE payload - needed for PSK auth */ + vec_free (sa.last_sa_init_req_packet_data); + vec_add (sa.last_sa_init_req_packet_data, ike0, len); + + /* add data to the SA then add it to the pool */ + sa.iaddr.as_u32 = if_ip->as_u32; + 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.i_auth.method = p->auth.method; + sa.i_auth.hex = p->auth.hex; + sa.i_auth.data = vec_dup (p->auth.data); + sa.i_auth.key = vec_dup (p->auth.key); + vec_add (sa.childs[0].tsi, &p->loc_ts, 1); + vec_add (sa.childs[0].tsr, &p->rem_ts, 1); + + /* add SA to the pool */ + ikev2_sa_t *sa0 = 0; + pool_get (km->sais, sa0); + clib_memcpy (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); + + } + + return 0; +} + +static void +ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa, + ikev2_child_sa_t * csa) +{ + /* Create the Initiator notification for child SA removal */ + ikev2_main_t *km = &ikev2_main; + 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 (sa->ispi); + ike0->rspi = clib_host_to_net_u64 (sa->rspi); + vec_resize (sa->del, 1); + sa->del->protocol_id = IKEV2_PROTOCOL_ESP; + 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); + + /* delete local child SA */ + ikev2_delete_tunnel_interface (km->vnet_main, sa, csa); + ikev2_sa_del_child_sa (sa, csa); +} + +clib_error_t * +ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi) +{ + clib_error_t *r; + ikev2_main_t *km = &ikev2_main; + ikev2_main_per_thread_data_t *tkm; + ikev2_sa_t *fsa = 0; + ikev2_child_sa_t *fchild = 0; + + /* Search for the child SA */ + vec_foreach (tkm, km->per_thread_data) + { + ikev2_sa_t *sa; + if (fchild) + break; + /* *INDENT-OFF* */ + pool_foreach (sa, tkm->sas, ({ + fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1); + if (fchild) + { + fsa = sa; + break; + } + })); + /* *INDENT-ON* */ + } + + if (!fchild || !fsa) + { + r = clib_error_return (0, "Child SA not found"); + return r; + } + else + { + ikev2_delete_child_sa_internal (vm, fsa, fchild); + } + + return 0; +} + +clib_error_t * +ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi) +{ + clib_error_t *r; + ikev2_main_t *km = &ikev2_main; + ikev2_main_per_thread_data_t *tkm; + ikev2_sa_t *fsa = 0; + ikev2_main_per_thread_data_t *ftkm = 0; + + /* Search for the IKE SA */ + vec_foreach (tkm, km->per_thread_data) + { + ikev2_sa_t *sa; + if (fsa) + break; + /* *INDENT-OFF* */ + pool_foreach (sa, tkm->sas, ({ + if (sa->ispi == ispi) + { + fsa = sa; + ftkm = tkm; + break; + } + })); + /* *INDENT-ON* */ + } + + if (!fsa) + { + r = clib_error_return (0, "IKE SA not found"); + 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); + } + + + return 0; +} + +static void +ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa, + ikev2_child_sa_t * csa) +{ + /* Create the Initiator request for create child SA */ + ike_header_t *ike0; + u32 bi0 = 0; + int len; + + + bi0 = ikev2_get_new_ike_header_buff (vm, &ike0); + + + ike0->version = IKE_VERSION_2; + ike0->flags = IKEV2_HDR_FLAG_INITIATOR; + ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA; + 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); + + ikev2_rekey_t *rekey; + vec_add2 (sa->rekey, rekey, 1); + ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals); + + /*need new ispi */ + 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); + vec_free (proposals); +} + +clib_error_t * +ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi) +{ + clib_error_t *r; + ikev2_main_t *km = &ikev2_main; + ikev2_main_per_thread_data_t *tkm; + ikev2_sa_t *fsa = 0; + ikev2_child_sa_t *fchild = 0; + + /* Search for the child SA */ + vec_foreach (tkm, km->per_thread_data) + { + ikev2_sa_t *sa; + if (fchild) + break; + /* *INDENT-OFF* */ + pool_foreach (sa, tkm->sas, ({ + fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1); + if (fchild) + { + fsa = sa; + break; + } + })); + /* *INDENT-ON* */ + } + + if (!fchild || !fsa) + { + r = clib_error_return (0, "Child SA not found"); + return r; + } + else + { + ikev2_rekey_child_sa_internal (vm, fsa, fchild); + } + + return 0; +} + +clib_error_t * ikev2_init (vlib_main_t * vm) { ikev2_main_t *km = &ikev2_main; @@ -2167,6 +3270,9 @@ ikev2_init (vlib_main_t * vm) hash_create (0, sizeof (uword)); } + km->sa_by_ispi = hash_create (0, sizeof (uword)); + + if ((error = vlib_call_init_function (vm, ikev2_cli_init))) return error; @@ -2176,6 +3282,146 @@ ikev2_init (vlib_main_t * vm) } +static u8 +ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa) +{ + ikev2_main_t *km = &ikev2_main; + vlib_main_t *vm = km->vlib_main; + f64 now = vlib_time_now (vm); + u8 res = 0; + + if (sa->is_initiator && sa->profile && csa->time_to_expiration + && now > csa->time_to_expiration) + { + if (!csa->is_expired || csa->rekey_retries > 0) + { + ikev2_rekey_child_sa_internal (vm, sa, csa); + csa->time_to_expiration = now + sa->profile->handover; + csa->is_expired = 1; + if (csa->rekey_retries == 0) + { + csa->rekey_retries = 5; + } + else if (csa->rekey_retries > 0) + { + csa->rekey_retries--; + clib_warning ("Rekeing Child SA 0x%x, retries left %d", + csa->i_proposals->spi, csa->rekey_retries); + if (csa->rekey_retries == 0) + { + csa->rekey_retries = -1; + } + } + res |= 1; + } + else + { + csa->time_to_expiration = 0; + ikev2_delete_child_sa_internal (vm, sa, csa); + res |= 1; + } + } + + return res; +} + +static void +ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa) +{ + ikev2_main_t *km = &ikev2_main; + vlib_main_t *vm = km->vlib_main; + ikev2_main_per_thread_data_t *tkm; + ikev2_sa_t *fsa = 0; + ikev2_child_sa_t *fchild = 0; + f64 now = vlib_time_now (vm); + + /* Search for the SA and child SA */ + vec_foreach (tkm, km->per_thread_data) + { + ikev2_sa_t *sa; + if (fchild) + break; + /* *INDENT-OFF* */ + pool_foreach (sa, tkm->sas, ({ + fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1); + if (fchild) + { + fsa = sa; + break; + } + })); + /* *INDENT-ON* */ + } + + if (fchild && fsa && fsa->profile && fsa->profile->lifetime_maxdata) + { + if (!fchild->is_expired + && ipsec_sa->total_data_size > fsa->profile->lifetime_maxdata) + { + fchild->time_to_expiration = now; + } + } +} + +static vlib_node_registration_t ikev2_mngr_process_node; + +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; + + while (1) + { + u8 req_sent = 0; + vlib_process_wait_for_event_or_clock (vm, 1); + vlib_process_get_events (vm, NULL); + + /* process ike child sas */ + ikev2_main_per_thread_data_t *tkm; + vec_foreach (tkm, km->per_thread_data) + { + ikev2_sa_t *sa; + /* *INDENT-OFF* */ + pool_foreach (sa, tkm->sas, ({ + ikev2_child_sa_t *c; + vec_foreach (c, sa->childs) + { + req_sent |= ikev2_mngr_process_child_sa(sa, c); + } + })); + /* *INDENT-ON* */ + } + + /* process ipsec sas */ + ipsec_sa_t *sa; + /* *INDENT-OFF* */ + pool_foreach (sa, im->sad, ({ + ikev2_mngr_process_ipsec_sa(sa); + })); + /* *INDENT-ON* */ + + if (req_sent) + { + vlib_process_wait_for_event_or_clock (vm, 5); + vlib_process_get_events (vm, NULL); + req_sent = 0; + } + + } + return 0; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = { + .function = ikev2_mngr_process_fn, + .type = VLIB_NODE_TYPE_PROCESS, + .name = + "ikev2-manager-process", +}; + +/* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON |