diff options
Diffstat (limited to 'src/vnet/ipsec/ikev2.c')
| -rw-r--r-- | src/vnet/ipsec/ikev2.c | 3477 |
1 files changed, 0 insertions, 3477 deletions
diff --git a/src/vnet/ipsec/ikev2.c b/src/vnet/ipsec/ikev2.c deleted file mode 100644 index d85feee4274..00000000000 --- a/src/vnet/ipsec/ikev2.c +++ /dev/null @@ -1,3477 +0,0 @@ -/* - * Copyright (c) 2015 Cisco and/or its affiliates. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include <vlib/vlib.h> -#include <vnet/vnet.h> -#include <vnet/pg/pg.h> -#include <vppinfra/error.h> -#include <vppinfra/random.h> -#include <vnet/udp/udp.h> -#include <vnet/ipsec/ipsec.h> -#include <vnet/ipsec/ikev2.h> -#include <vnet/ipsec/ikev2_priv.h> -#include <openssl/sha.h> - -ikev2_main_t ikev2_main; - -static int ikev2_delete_tunnel_interface (vnet_main_t * vnm, - ikev2_sa_t * sa, - ikev2_child_sa_t * child); - -#define ikev2_set_state(sa, v) do { \ - (sa)->state = v; \ - clib_warning("sa state changed to " #v); \ - } while(0); - -typedef struct -{ - u32 next_index; - u32 sw_if_index; -} ikev2_trace_t; - -static u8 * -format_ikev2_trace (u8 * s, va_list * args) -{ - CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); - CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); - ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *); - - s = format (s, "ikev2: sw_if_index %d, next index %d", - t->sw_if_index, t->next_index); - return s; -} - -static vlib_node_registration_t ikev2_node; - -#define foreach_ikev2_error \ -_(PROCESSED, "IKEv2 packets processed") \ -_(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \ -_(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \ -_(IKE_REQ_RETRANSMIT, "IKE request retransmit") \ -_(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \ -_(NOT_IKEV2, "Non IKEv2 packets received") - -typedef enum -{ -#define _(sym,str) IKEV2_ERROR_##sym, - foreach_ikev2_error -#undef _ - IKEV2_N_ERROR, -} ikev2_error_t; - -static char *ikev2_error_strings[] = { -#define _(sym,string) string, - foreach_ikev2_error -#undef _ -}; - -typedef enum -{ - IKEV2_NEXT_IP4_LOOKUP, - IKEV2_NEXT_ERROR_DROP, - IKEV2_N_NEXT, -} ikev2_next_t; - -static ikev2_sa_transform_t * -ikev2_find_transform_data (ikev2_sa_transform_t * t) -{ - ikev2_main_t *km = &ikev2_main; - ikev2_sa_transform_t *td; - - vec_foreach (td, km->supported_transforms) - { - if (td->type != t->type) - continue; - - if (td->transform_id != t->transform_id) - continue; - - if (td->type == IKEV2_TRANSFORM_TYPE_ENCR) - { - if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80 - || t->attrs[1] != 14) - continue; - - if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len) - continue; - } - return td; - } - return 0; -} - -static ikev2_sa_proposal_t * -ikev2_select_proposal (ikev2_sa_proposal_t * proposals, - ikev2_protocol_id_t prot_id) -{ - ikev2_sa_proposal_t *rv = 0; - ikev2_sa_proposal_t *proposal; - ikev2_sa_transform_t *transform, *new_t; - u8 mandatory_bitmap, optional_bitmap; - - 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; - } - else if (prot_id == IKEV2_PROTOCOL_ESP) - { - mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) | - (1 << IKEV2_TRANSFORM_TYPE_ESN); - optional_bitmap = mandatory_bitmap | - (1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH); - } - else if (prot_id == IKEV2_PROTOCOL_AH) - { - mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) | - (1 << IKEV2_TRANSFORM_TYPE_ESN); - optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH); - } - else - return 0; - - vec_add2 (rv, proposal, 1); - - vec_foreach (proposal, proposals) - { - u8 bitmap = 0; - if (proposal->protocol_id != prot_id) - continue; - - vec_foreach (transform, proposal->transforms) - { - if ((1 << transform->type) & bitmap) - continue; - - if (ikev2_find_transform_data (transform)) - { - bitmap |= 1 << transform->type; - vec_add2 (rv->transforms, new_t, 1); - clib_memcpy_fast (new_t, transform, sizeof (*new_t)); - new_t->attrs = vec_dup (transform->attrs); - } - } - - 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) - { - rv->proposal_num = proposal->proposal_num; - rv->protocol_id = proposal->protocol_id; - RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi)); - goto done; - } - else - { - vec_free (rv->transforms); - } - } - - vec_free (rv); -done: - return rv; -} - -ikev2_sa_transform_t * -ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p, - ikev2_transform_type_t type) -{ - ikev2_sa_transform_t *t; - - if (!p) - return 0; - - vec_foreach (t, p->transforms) - { - if (t->type == type) - return ikev2_find_transform_data (t); - } - return 0; -} - -ikev2_child_sa_t * -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) - { - 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; - } - - return 0; -} - -void -ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v) -{ - ikev2_sa_proposal_t *p; - ikev2_sa_transform_t *t; - - if (!*v) - return; - - vec_foreach (p, *v) - { - vec_foreach (t, p->transforms) - { - vec_free (t->attrs); - } - vec_free (p->transforms); - } - vec_free (*v); -}; - -static void -ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs) -{ - ikev2_child_sa_t *c; - vec_foreach (c, *childs) - { - ikev2_sa_free_proposal_vector (&c->r_proposals); - ikev2_sa_free_proposal_vector (&c->i_proposals); - vec_free (c->sk_ai); - vec_free (c->sk_ar); - vec_free (c->sk_ei); - vec_free (c->sk_er); - } - - vec_free (*childs); -} - -static void -ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child) -{ - ikev2_sa_free_proposal_vector (&child->r_proposals); - ikev2_sa_free_proposal_vector (&child->i_proposals); - vec_free (child->sk_ai); - vec_free (child->sk_ar); - vec_free (child->sk_ei); - vec_free (child->sk_er); - - vec_del1 (sa->childs, child - sa->childs); -} - -static void -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); - - vec_free (sa->sk_d); - vec_free (sa->sk_ai); - vec_free (sa->sk_ar); - vec_free (sa->sk_ei); - vec_free (sa->sk_er); - vec_free (sa->sk_pi); - vec_free (sa->sk_pr); - - vec_free (sa->i_id.data); - vec_free (sa->i_auth.data); - vec_free (sa->r_id.data); - vec_free (sa->r_auth.data); - if (sa->r_auth.key) - EVP_PKEY_free (sa->r_auth.key); - - vec_free (sa->del); - - ikev2_sa_free_all_child_sa (&sa->childs); -} - -static void -ikev2_delete_sa (ikev2_sa_t * sa) -{ - ikev2_main_t *km = &ikev2_main; - u32 thread_index = vlib_get_thread_index (); - uword *p; - - ikev2_sa_free_all_vec (sa); - - p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi); - if (p) - { - hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi); - pool_put (km->per_thread_data[thread_index].sas, sa); - } -} - -static void -ikev2_generate_sa_init_data (ikev2_sa_t * sa) -{ - ikev2_sa_transform_t *t = 0, *t2; - ikev2_main_t *km = &ikev2_main; - - 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; - } - - 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 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 -ikev2_calc_keys (ikev2_sa_t * sa) -{ - u8 *tmp; - /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */ - u8 *skeyseed = 0; - u8 *s = 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); - tr_prf = - ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF); - tr_integ = - ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG); - - vec_append (s, sa->i_nonce); - vec_append (s, sa->r_nonce); - skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key); - - /* Calculate S = Ni | Nr | SPIi | SPIr */ - u64 *spi; - vec_add2 (s, tmp, 2 * sizeof (*spi)); - spi = (u64 *) tmp; - spi[0] = clib_host_to_net_u64 (sa->ispi); - spi[1] = clib_host_to_net_u64 (sa->rspi); - - /* calculate PRFplus */ - u8 *keymat; - int len = tr_prf->key_trunc + /* SK_d */ - tr_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 */ - - keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len); - vec_free (skeyseed); - vec_free (s); - - int pos = 0; - - /* SK_d */ - sa->sk_d = vec_new (u8, tr_prf->key_trunc); - clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc); - pos += tr_prf->key_trunc; - - /* SK_ai */ - sa->sk_ai = vec_new (u8, tr_integ->key_len); - clib_memcpy_fast (sa->sk_ai, keymat + pos, tr_integ->key_len); - pos += tr_integ->key_len; - - /* SK_ar */ - sa->sk_ar = vec_new (u8, tr_integ->key_len); - clib_memcpy_fast (sa->sk_ar, keymat + pos, tr_integ->key_len); - pos += tr_integ->key_len; - - /* 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; - - /* 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; - - /* SK_pi */ - sa->sk_pi = vec_new (u8, tr_prf->key_len); - clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len); - pos += tr_prf->key_len; - - /* SK_pr */ - sa->sk_pr = vec_new (u8, tr_prf->key_len); - clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len); - pos += tr_prf->key_len; - - vec_free (keymat); -} - -static void -ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child) -{ - u8 *s = 0; - ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ; - tr_prf = - ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF); - ctr_encr = - ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR); - ctr_integ = - ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG); - - vec_append (s, sa->i_nonce); - vec_append (s, sa->r_nonce); - /* calculate PRFplus */ - u8 *keymat; - int len = ctr_encr->key_len * 2 + ctr_integ->key_len * 2; - - keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len); - - int pos = 0; - - /* SK_ei */ - child->sk_ei = vec_new (u8, ctr_encr->key_len); - clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len); - pos += ctr_encr->key_len; - - /* SK_ai */ - child->sk_ai = vec_new (u8, ctr_integ->key_len); - clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len); - pos += ctr_integ->key_len; - - /* SK_er */ - child->sk_er = vec_new (u8, ctr_encr->key_len); - clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len); - pos += ctr_encr->key_len; - - /* SK_ar */ - child->sk_ar = vec_new (u8, ctr_integ->key_len); - clib_memcpy_fast (child->sk_ar, keymat + pos, ctr_integ->key_len); - pos += ctr_integ->key_len; - - ASSERT (pos == len); - - vec_free (keymat); -} - -static void -ikev2_process_sa_init_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; - - 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); - - /* 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, 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->i_proposals); - sa->i_proposals = ikev2_parse_sa_payload (ikep); - } - 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->i_dh_data); - vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke)); - } - else if (payload == IKEV2_PAYLOAD_NONCE) - { - vec_free (sa->i_nonce); - vec_add (sa->i_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; - } - - 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) -{ - int p = 0; - u8 last_payload = 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; - tr_integ = - ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG); - - while (p < len && - *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK) - { - ikep = (ike_payload_header_t *) & ike->payload[p]; - plen = clib_net_to_host_u16 (ikep->length); - - if (plen < sizeof (*ikep)) - return 0; - - 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); - if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) - { - sa->unsupported_cp = *payload; - return 0; - } - } - - *payload = ikep->nextpayload; - p += plen; - } - - if (last_payload != IKEV2_PAYLOAD_SK) - { - clib_warning ("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); - - plen = plen - sizeof (*ikep) - tr_integ->key_trunc; - - if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc)) - { - clib_warning ("message integrity check failed"); - vec_free (hmac); - return 0; - } - vec_free (hmac); - - return ikev2_decrypt_data (sa, ikep->payload, plen); -} - -static void -ikev2_initial_contact_cleanup (ikev2_sa_t * sa) -{ - ikev2_main_t *km = &ikev2_main; - ikev2_sa_t *tmp; - u32 i, *delete = 0; - ikev2_child_sa_t *c; - u32 thread_index = vlib_get_thread_index (); - - if (!sa->initial_contact) - return; - - /* 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))) - continue; - - if (sa->rspi != tmp->rspi) - vec_add1(delete, tmp - km->per_thread_data[thread_index].sas); - })); - /* *INDENT-ON* */ - - for (i = 0; i < vec_len (delete); i++) - { - tmp = - pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]); - vec_foreach (c, - tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main, - tmp, c); - ikev2_delete_sa (tmp); - } - - vec_free (delete); - sa->initial_contact = 0; -} - -static void -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_calc_keys (sa); - - plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload); - - if (!plaintext) - { - if (sa->unsupported_cp) - ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE); - goto cleanup_and_exit; - } - - /* 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 */ - p = 0; - while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE) - { - ikep = (ike_payload_header_t *) & plaintext[p]; - plen = clib_net_to_host_u16 (ikep->length); - - if (plen < sizeof (ike_payload_header_t)) - goto cleanup_and_exit; - - 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); - 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 */ - { - 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)); - - clib_warning ("received payload IDi, len %u id_type %u", - plen - sizeof (*id), id->id_type); - } - else if (payload == IKEV2_PAYLOAD_IDR) /* 36 */ - { - ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep; - - 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 */ - { - ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep; - - 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); - } - else if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */ - { - ikev2_notify_t *n = ikev2_parse_notify_payload (ikep); - if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT) - { - sa->initial_contact = 1; - } - vec_free (n); - } - else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */ - { - ikev2_parse_vendor_payload (ikep); - } - 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); - - 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; - } - -cleanup_and_exit: - vec_free (plaintext); -} - -static void -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); - - plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload); - - if (!plaintext) - goto cleanup_and_exit; - - /* process encrypted payload */ - p = 0; - while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE) - { - ikep = (ike_payload_header_t *) & plaintext[p]; - plen = clib_net_to_host_u16 (ikep->length); - - if (plen < sizeof (ike_payload_header_t)) - goto cleanup_and_exit; - - if (payload == IKEV2_PAYLOAD_NOTIFY) /* 41 */ - { - ikev2_notify_t *n = ikev2_parse_notify_payload (ikep); - if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED) - ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED); - vec_free (n); - } - else if (payload == IKEV2_PAYLOAD_DELETE) /* 42 */ - { - sa->del = ikev2_parse_delete_payload (ikep); - } - else if (payload == IKEV2_PAYLOAD_VENDOR) /* 43 */ - { - ikev2_parse_vendor_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); - - if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) - { - sa->unsupported_cp = payload; - return; - } - } - - payload = ikep->nextpayload; - p += plen; - } - -cleanup_and_exit: - vec_free (plaintext); -} - -static void -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; - u8 nonce[IKEV2_NONCE_SIZE]; - - ike_payload_header_t *ikep; - u32 plen; - ikev2_notify_t *n = 0; - ikev2_ts_t *tsi = 0; - ikev2_ts_t *tsr = 0; - 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); - - plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload); - - if (!plaintext) - goto cleanup_and_exit; - - /* process encrypted payload */ - p = 0; - while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE) - { - ikep = (ike_payload_header_t *) & plaintext[p]; - plen = clib_net_to_host_u16 (ikep->length); - - if (plen < sizeof (ike_payload_header_t)) - goto cleanup_and_exit; - - else if (payload == IKEV2_PAYLOAD_SA) - { - proposal = ikev2_parse_sa_payload (ikep); - } - else if (payload == IKEV2_PAYLOAD_NOTIFY) - { - n = ikev2_parse_notify_payload (ikep); - if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA) - { - rekeying = 1; - } - } - else if (payload == IKEV2_PAYLOAD_DELETE) - { - sa->del = ikev2_parse_delete_payload (ikep); - } - else if (payload == IKEV2_PAYLOAD_VENDOR) - { - ikev2_parse_vendor_payload (ikep); - } - else if (payload == IKEV2_PAYLOAD_NONCE) - { - clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep)); - } - else if (payload == IKEV2_PAYLOAD_TSI) - { - tsi = ikev2_parse_ts_payload (ikep); - } - else if (payload == IKEV2_PAYLOAD_TSR) - { - 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); - - if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL) - { - sa->unsupported_cp = payload; - return; - } - } - - payload = ikep->nextpayload; - p += plen; - } - - 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, 1); - if (!child_sa) - { - clib_warning ("child SA spi %lx not found", n->spi); - goto cleanup_and_exit; - } - vec_add2 (sa->rekey, rekey, 1); - rekey->protocol_id = n->protocol_id; - rekey->spi = n->spi; - rekey->i_proposal = proposal; - rekey->r_proposal = - ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP); - rekey->tsi = tsi; - rekey->tsr = tsr; - /* update Ni */ - vec_free (sa->i_nonce); - 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); - RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE); - } - -cleanup_and_exit: - vec_free (plaintext); - vec_free (n); -} - -static u8 * -ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder) -{ - u8 *authmsg = 0; - u8 *data; - u8 *nonce; - ikev2_id_t *id; - u8 *key; - u8 *packet_data; - ikev2_sa_transform_t *tr_prf; - - tr_prf = - ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF); - - if (is_responder) - { - id = &sa->r_id; - key = sa->sk_pr; - nonce = sa->i_nonce; - packet_data = sa->last_sa_init_res_packet_data; - } - else - { - id = &sa->i_id; - key = sa->sk_pi; - nonce = sa->r_nonce; - packet_data = sa->last_sa_init_req_packet_data; - } - - data = vec_new (u8, 4); - data[0] = id->type; - vec_append (data, id->data); - - u8 *id_hash = ikev2_calc_prf (tr_prf, key, data); - vec_append (authmsg, packet_data); - vec_append (authmsg, nonce); - vec_append (authmsg, id_hash); - vec_free (id_hash); - vec_free (data); - - return authmsg; -} - -static int -ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2) -{ - if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id && - ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port && - ts1->start_addr.as_u32 == ts2->start_addr.as_u32 && - ts1->end_addr.as_u32 == ts2->end_addr.as_u32) - return 1; - - return 0; -} - -static void -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; - - /* *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 != 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_tsi, ts)) - { - tsi = vec_dup(ts); - break; - } - } - - vec_foreach(ts, sa->childs[0].tsr) - { - if (ikev2_ts_cmp(p_tsr, ts)) - { - tsr = vec_dup(ts); - break; - } - } - - break; - })); - /* *INDENT-ON* */ - - if (tsi && tsr) - { - vec_free (sa->childs[0].tsi); - vec_free (sa->childs[0].tsr); - sa->childs[0].tsi = tsi; - sa->childs[0].tsr = tsr; - } - else - { - vec_free (tsi); - vec_free (tsr); - ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE); - } -} - -static void -ikev2_sa_auth (ikev2_sa_t * sa) -{ - ikev2_main_t *km = &ikev2_main; - ikev2_profile_t *p, *sel_p = 0; - u8 *authmsg, *key_pad, *psk = 0, *auth = 0; - ikev2_sa_transform_t *tr_prf; - - tr_prf = - ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF); - - /* only shared key and rsa signature */ - if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC || - sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)) - { - 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, 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_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_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC) - { - if (!p->auth.data || - p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC) - continue; - - psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad); - auth = ikev2_calc_prf(tr_prf, psk, authmsg); - - if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data))) - { - ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED); - vec_free(auth); - sel_p = p; - break; - } - - } - else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG) - { - if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG) - continue; - - if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1) - { - ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED); - sel_p = p; - break; - } - } - - vec_free(auth); - vec_free(psk); - })); - /* *INDENT-ON* */ - - vec_free (authmsg); - - if (sa->state == IKEV2_STATE_AUTHENTICATED) - { - if (!sa->is_initiator) - { - 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); - } - } - else - { - ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED); - } - vec_free (psk); - vec_free (key_pad); -} - - -static void -ikev2_sa_auth_init (ikev2_sa_t * sa) -{ - 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; - u8 integ_type = 0; - - if (!child->r_proposals) - { - ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN); - return 1; - } - - clib_memset (&a, 0, sizeof (a)); - a.is_add = 1; - if (sa->is_initiator) - { - a.local_ip.ip4.as_u32 = sa->iaddr.as_u32; - a.remote_ip.ip4.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.ip4.as_u32 = sa->raddr.as_u32; - a.remote_ip.ip4.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 (proposals, IKEV2_TRANSFORM_TYPE_ESN); - if (tr) - a.esn = tr->esn_type; - else - a.esn = 0; - - 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) - { - switch (tr->key_len) - { - case 16: - encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128; - break; - case 24: - encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192; - break; - case 32: - encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256; - break; - default: - ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN); - return 1; - break; - } - } - else - { - ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN); - return 1; - } - } - else - { - ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN); - return 1; - } - - tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG); - if (tr) - { - switch (tr->integ_type) - { - case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128: - integ_type = IPSEC_INTEG_ALG_SHA_256_128; - break; - case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192: - integ_type = IPSEC_INTEG_ALG_SHA_384_192; - break; - case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256: - integ_type = IPSEC_INTEG_ALG_SHA_512_256; - break; - case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96: - integ_type = IPSEC_INTEG_ALG_SHA1_96; - break; - default: - ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN); - return 1; - } - } - else - { - ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN); - return 1; - } - - 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 = integ_type; - a.local_integ_key_len = vec_len (loc_ikey); - clib_memcpy_fast (a.local_integ_key, loc_ikey, a.local_integ_key_len); - a.remote_integ_key_len = vec_len (rem_ikey); - clib_memcpy_fast (a.remote_integ_key, rem_ikey, a.remote_integ_key_len); - - a.crypto_alg = encr_type; - a.local_crypto_key_len = vec_len (loc_ckey); - clib_memcpy_fast (a.local_crypto_key, loc_ckey, a.local_crypto_key_len); - a.remote_crypto_key_len = vec_len (rem_ckey); - clib_memcpy_fast (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) - { - // This is not much better than rand(3), which Coverity warns - // is unsuitable for security applications; random_u32 is - // 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); - rnd = random_u32 (&rnd); - - child->time_to_expiration += - 1 + (rnd % sa->profile->lifetime_jitter); - } - } - - ipsec_add_del_tunnel_if (&a); - - return 0; -} - -static int -ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa, - ikev2_child_sa_t * child) -{ - ipsec_add_del_tunnel_args_t a; - - if (sa->is_initiator) - { - if (!vec_len (child->i_proposals)) - return 0; - - a.is_add = 0; - a.local_ip.ip4.as_u32 = sa->iaddr.as_u32; - a.remote_ip.ip4.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.ip4.as_u32 = sa->raddr.as_u32; - a.remote_ip.ip4.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_message (ikev2_sa_t * sa, ike_header_t * ike, void *user) -{ - v8 *integ = 0; - ike_payload_header_t *ph; - u16 plen; - u32 tlen = 0; - - ikev2_sa_transform_t *tr_encr, *tr_integ; - tr_encr = - ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR); - tr_integ = - ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG); - - ikev2_payload_chain_t *chain = 0; - ikev2_payload_new_chain (chain); - - if (ike->exchange == IKEV2_EXCHANGE_SA_INIT) - { - if (sa->r_proposals == 0) - { - ikev2_payload_add_notify (chain, - IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0); - ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE); - } - else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE) - { - u8 *data = vec_new (u8, 2); - ikev2_sa_transform_t *tr_dh; - tr_dh = - ikev2_sa_get_td_for_type (sa->r_proposals, - IKEV2_TRANSFORM_TYPE_DH); - ASSERT (tr_dh && tr_dh->dh_type); - - data[0] = (tr_dh->dh_type >> 8) & 0xff; - data[1] = (tr_dh->dh_type) & 0xff; - - ikev2_payload_add_notify (chain, - IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD, - data); - vec_free (data); - ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE); - } - else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE) - { - 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); - } - else - { - 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); - } - } - else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH) - { - if (sa->state == IKEV2_STATE_AUTHENTICATED) - { - ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR); - 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); - ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR); - } - else if (sa->state == IKEV2_STATE_AUTH_FAILED) - { - ikev2_payload_add_notify (chain, - IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED, - 0); - ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE); - } - else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE) - { - ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE, - 0); - ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR); - ikev2_payload_add_auth (chain, &sa->r_auth); - } - else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN) - { - ikev2_payload_add_notify (chain, - IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0); - ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR); - ikev2_payload_add_auth (chain, &sa->r_auth); - 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 if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE) - { - 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); - } - 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); - goto done; - } - } - else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL) - { - /* if pending delete */ - if (sa->del) - { - 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 - delete payloads for the paired SAs going in the other direction. */ - else - { - ikev2_payload_add_delete (chain, sa->del); - } - vec_free (sa->del); - sa->del = 0; - } - /* received N(AUTHENTICATION_FAILED) */ - else if (sa->state == IKEV2_STATE_AUTH_FAILED) - { - ikev2_set_state (sa, IKEV2_STATE_DELETED); - goto done; - } - /* received unsupported critical payload */ - 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 send empty response */ - } - else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA) - { - if (sa->is_initiator) - { - - ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user; - ikev2_notify_t notify; - u8 *data = vec_new (u8, 4); - clib_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); - } - else - { - 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->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) - { - tlen += vec_len (chain->data); - ike->nextpayload = chain->first_payload_type; - ike->length = clib_host_to_net_u32 (tlen); - clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data)); - - /* 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, tlen); - } - else - { - - ikev2_payload_chain_add_padding (chain, tr_encr->block_size); - - /* SK payload */ - plen = sizeof (*ph); - 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; - 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); - - /* store whole IKE payload - needed for retransmit */ - vec_free (sa->last_res_packet_data); - vec_add (sa->last_res_packet_data, ike, tlen); - } - -done: - ikev2_payload_destroy_chain (chain); - vec_free (integ); - return tlen; -} - -static int -ikev2_retransmit_sa_init (ike_header_t * ike, - ip4_address_t iaddr, ip4_address_t raddr) -{ - ikev2_main_t *km = &ikev2_main; - ikev2_sa_t *sa; - u32 thread_index = vlib_get_thread_index (); - - /* *INDENT-OFF* */ - pool_foreach (sa, km->per_thread_data[thread_index].sas, ({ - if (sa->ispi == clib_net_to_host_u64(ike->ispi) && - sa->iaddr.as_u32 == iaddr.as_u32 && - sa->raddr.as_u32 == raddr.as_u32) - { - int p = 0; - u32 len = clib_net_to_host_u32(ike->length); - u8 payload = ike->nextpayload; - - 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 -1; - - if (payload == IKEV2_PAYLOAD_NONCE) - { - if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep))) - { - /* req is retransmit */ - if (sa->state == IKEV2_STATE_SA_INIT) - { - ike_header_t * tmp; - tmp = (ike_header_t*)sa->last_sa_init_res_packet_data; - ike->ispi = tmp->ispi; - ike->rspi = tmp->rspi; - ike->nextpayload = tmp->nextpayload; - ike->version = tmp->version; - ike->exchange = tmp->exchange; - ike->flags = tmp->flags; - ike->msgid = tmp->msgid; - 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); - return 1; - } - /* else ignore req */ - else - { - clib_warning("IKE_SA_INIT ignore from %U to %U", - format_ip4_address, &raddr, - format_ip4_address, &iaddr); - return -1; - } - } - } - payload = ikep->nextpayload; - p+=plen; - } - } - })); - /* *INDENT-ON* */ - - /* req is not retransmit */ - return 0; -} - -static int -ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike) -{ - u32 msg_id = clib_net_to_host_u32 (ike->msgid); - - /* new req */ - if (msg_id > sa->last_msg_id) - { - sa->last_msg_id = msg_id; - return 0; - } - /* retransmitted req */ - else if (msg_id == sa->last_msg_id) - { - ike_header_t *tmp; - tmp = (ike_header_t *) sa->last_res_packet_data; - ike->ispi = tmp->ispi; - ike->rspi = tmp->rspi; - ike->nextpayload = tmp->nextpayload; - ike->version = tmp->version; - ike->exchange = tmp->exchange; - ike->flags = tmp->flags; - ike->msgid = tmp->msgid; - 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); - 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; - } -} - - -static uword -ikev2_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - u32 n_left_from, *from, *to_next; - ikev2_next_t next_index; - ikev2_main_t *km = &ikev2_main; - u32 thread_index = vlib_get_thread_index (); - - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; - next_index = node->cached_next_index; - - while (n_left_from > 0) - { - u32 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - u32 next0 = IKEV2_NEXT_ERROR_DROP; - u32 sw_if_index0; - ip4_header_t *ip40; - udp_header_t *udp0; - ike_header_t *ike0; - ikev2_sa_t *sa0 = 0; - ikev2_sa_t sa; /* temporary store for SA */ - int len = 0; - int r; - - /* speculatively enqueue b0 to the current next frame */ - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - 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 (ike0->version != IKE_VERSION_2) - { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_NOT_IKEV2, 1); - goto dispatch0; - } - - if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT) - { - sa0 = &sa; - clib_memset (sa0, 0, sizeof (*sa0)); - - if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR) - { - if (ike0->rspi == 0) - { - 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); - - 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[thread_index].sas, - sa0); - clib_memcpy_fast (sa0, &sa, sizeof (*sa0)); - hash_set (km-> - per_thread_data[thread_index].sa_by_rspi, - sa0->rspi, - sa0 - - km->per_thread_data[thread_index].sas); - } - else - { - ikev2_sa_free_all_vec (sa0); - } - } - } - else //received sa_init without initiator flag - { - ikev2_process_sa_init_resp (vm, sa0, ike0); - - if (sa0->state == IKEV2_STATE_SA_INIT) - { - 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) - { - /* add SA to the pool */ - pool_get (km->per_thread_data[thread_index].sas, sa0); - clib_memcpy_fast (sa0, &sa, sizeof (*sa0)); - hash_set (km->per_thread_data[thread_index].sa_by_rspi, - sa0->rspi, - sa0 - km->per_thread_data[thread_index].sas); - } - else - { - ikev2_sa_free_all_vec (sa0); - } - } - } - else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH) - { - uword *p; - p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, - clib_net_to_host_u64 (ike0->rspi)); - if (p) - { - sa0 = - pool_elt_at_index (km->per_thread_data[thread_index].sas, - p[0]); - - r = ikev2_retransmit_resp (sa0, ike0); - if (r == 1) - { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_IKE_REQ_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_REQ_IGNORE, - 1); - goto dispatch0; - } - - ikev2_process_auth_req (vm, sa0, ike0); - ikev2_sa_auth (sa0); - if (sa0->state == IKEV2_STATE_AUTHENTICATED) - { - ikev2_initial_contact_cleanup (sa0); - ikev2_sa_match_ts (sa0); - if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE) - ikev2_create_tunnel_interface (km->vnet_main, sa0, - &sa0->childs[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); - } - } - else - { - len = ikev2_generate_message (sa0, ike0, 0); - } - } - } - else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL) - { - uword *p; - p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, - clib_net_to_host_u64 (ike0->rspi)); - if (p) - { - sa0 = - pool_elt_at_index (km->per_thread_data[thread_index].sas, - p[0]); - - r = ikev2_retransmit_resp (sa0, ike0); - if (r == 1) - { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_IKE_REQ_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_REQ_IGNORE, - 1); - goto dispatch0; - } - - ikev2_process_informational_req (vm, sa0, ike0); - if (sa0->del) - { - if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE) - { - ikev2_delete_t *d, *tmp, *resp = 0; - vec_foreach (d, sa0->del) - { - ikev2_child_sa_t *ch_sa; - ch_sa = ikev2_sa_get_child (sa0, d->spi, - d->protocol_id, - !sa0->is_initiator); - if (ch_sa) - { - ikev2_delete_tunnel_interface (km->vnet_main, - sa0, ch_sa); - 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); - } - } - if (!sa0->is_initiator) - { - vec_free (sa0->del); - sa0->del = resp; - } - } - } - if (!sa0->is_initiator) - { - len = ikev2_generate_message (sa0, ike0, 0); - } - } - } - else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA) - { - uword *p; - p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, - clib_net_to_host_u64 (ike0->rspi)); - if (p) - { - sa0 = - pool_elt_at_index (km->per_thread_data[thread_index].sas, - p[0]); - - r = ikev2_retransmit_resp (sa0, ike0); - if (r == 1) - { - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_IKE_REQ_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_REQ_IGNORE, - 1); - goto dispatch0; - } - - ikev2_process_create_child_sa_req (vm, sa0, ike0); - if (sa0->rekey) - { - if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE) - { - ikev2_child_sa_t *child; - vec_add2 (sa0->childs, child, 1); - 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, sa0, - child); - } - if (sa0->is_initiator) - { - vec_del1 (sa0->rekey, 0); - } - else - { - len = ikev2_generate_message (sa0, ike0, 0); - } - } - } - } - 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); - } - - dispatch0: - /* if we are sending packet back, rewrite headers */ - if (len) - { - next0 = IKEV2_NEXT_IP4_LOOKUP; - 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; - 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); - } - /* delete sa */ - if (sa0 && (sa0->state == IKEV2_STATE_DELETED || - sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)) - { - ikev2_child_sa_t *c; - - vec_foreach (c, sa0->childs) - ikev2_delete_tunnel_interface (km->vnet_main, sa0, c); - - ikev2_delete_sa (sa0); - } - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - } - - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, - n_left_to_next, bi0, next0); - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - vlib_node_increment_counter (vm, ikev2_node.index, - IKEV2_ERROR_PROCESSED, frame->n_vectors); - return frame->n_vectors; -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ikev2_node,static) = { - .function = ikev2_node_fn, - .name = "ikev2", - .vector_size = sizeof (u32), - .format_trace = format_ikev2_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(ikev2_error_strings), - .error_strings = ikev2_error_strings, - - .n_next_nodes = IKEV2_N_NEXT, - - .next_nodes = { - [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup", - [IKEV2_NEXT_ERROR_DROP] = "error-drop", - }, -}; -/* *INDENT-ON* */ - -// set ikev2 proposals when vpp is used as initiator -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 == ts->crypto_alg - && 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 == 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; - } - - /* 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_SHA2_256) - { - 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) -{ - ikev2_main_t *km = &ikev2_main; - uword *p; - - p = mhash_get (&km->profile_index_by_name, name); - if (!p) - return 0; - - 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) -{ - ikev2_main_t *km = &ikev2_main; - - km->pkey = ikev2_load_key_file (file); - if (km->pkey == NULL) - return clib_error_return (0, "load key '%s' failed", file); - - return 0; -} - -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->responder.sw_if_index = ~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); - - vec_free (p->name); - pool_put (km->profiles, p); - mhash_unset (&km->profile_index_by_name, name, 0); - } - return 0; -} - -clib_error_t * -ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method, - u8 * auth_data, u8 data_hex_format) -{ - 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; - } - vec_free (p->auth.data); - p->auth.method = auth_method; - p->auth.data = vec_dup (auth_data); - p->auth.hex = data_hex_format; - - if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG) - { - 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); - if (p->auth.key == NULL) - return clib_error_return (0, "load cert '%s' failed", auth_data); - } - - return 0; -} - -clib_error_t * -ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data, - int is_local) -{ - ikev2_profile_t *p; - clib_error_t *r; - - if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR - && id_type < IKEV2_ID_TYPE_ID_KEY_ID) - { - r = clib_error_return (0, "unsupported identity type %U", - format_ikev2_id_type, id_type); - return r; - } - - p = ikev2_profile_index_by_name (name); - - if (!p) - { - r = clib_error_return (0, "unknown profile %v", name); - return r; - } - - if (is_local) - { - vec_free (p->loc_id.data); - p->loc_id.type = id_type; - p->loc_id.data = vec_dup (data); - } - else - { - vec_free (p->rem_id.data); - p->rem_id.type = id_type; - p->rem_id.data = vec_dup (data); - } - - return 0; -} - -clib_error_t * -ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id, - u16 start_port, u16 end_port, ip4_address_t start_addr, - ip4_address_t end_addr, int is_local) -{ - 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; - } - - if (is_local) - { - p->loc_ts.start_addr.as_u32 = start_addr.as_u32; - p->loc_ts.end_addr.as_u32 = end_addr.as_u32; - p->loc_ts.start_port = start_port; - p->loc_ts.end_port = end_port; - p->loc_ts.protocol_id = protocol_id; - p->loc_ts.ts_type = 7; - } - else - { - p->rem_ts.start_addr.as_u32 = start_addr.as_u32; - p->rem_ts.end_addr.as_u32 = end_addr.as_u32; - p->rem_ts.start_port = start_port; - p->rem_ts.end_port = end_port; - p->rem_ts.protocol_id = protocol_id; - p->rem_ts.ts_type = 7; - } - - return 0; -} - - -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; - clib_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_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); - 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); - 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_fast (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 boilerplate */ - len += vec_len (chain->data); - ike0->nextpayload = chain->first_payload_type; - ike0->length = clib_host_to_net_u32 (len); - clib_memcpy_fast (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); -#if OPENSSL_VERSION_NUMBER >= 0x10100000L - clib_memcpy_fast (sa.i_auth.key, p->auth.key, - EVP_PKEY_size (p->auth.key)); -#else - sa.i_auth.key = vec_dup (p->auth.key); -#endif - 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_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); - - } - - 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; - clib_error_t *error; - vlib_thread_main_t *tm = vlib_get_thread_main (); - int thread_id; - - clib_memset (km, 0, sizeof (ikev2_main_t)); - km->vnet_main = vnet_get_main (); - km->vlib_main = vm; - - 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++) - { - km->per_thread_data[thread_id].sa_by_rspi = - 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; - - udp_register_dst_port (vm, 500, ikev2_node.index, 1); - - return 0; -} - - -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 ("Rekeying 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); - vlib_counter_t counts; - - /* 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* */ - } - vlib_get_combined_counter (&ipsec_sa_counters, - ipsec_sa->stat_index, &counts); - - if (fchild && fsa && fsa->profile && fsa->profile->lifetime_maxdata) - { - if (!fchild->is_expired - && counts.bytes > 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 - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |