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-rw-r--r--src/vnet/ipsec/ikev2.c3477
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 (&notify, 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,
- &notify);
-
- 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:
- */