*/
#include <vnet/ipsec/ipsec.h>
+#include <vnet/ipsec/esp.h>
+#include <vnet/udp/udp_local.h>
#include <vnet/fib/fib_table.h>
+#include <vnet/fib/fib_entry_track.h>
+#include <vnet/ipsec/ipsec_tun.h>
/**
* @brief
.stat_segment_name = "/net/ipsec/sa",
};
+ipsec_sa_t *ipsec_sa_pool;
static clib_error_t *
ipsec_call_add_del_callbacks (ipsec_main_t * im, ipsec_sa_t * sa,
/**
* 'stack' (resolve the recursion for) the SA tunnel destination
*/
-void
+static void
ipsec_sa_stack (ipsec_sa_t * sa)
{
ipsec_main_t *im = &ipsec_main;
- fib_forward_chain_type_t fct;
dpo_id_t tmp = DPO_INVALID;
- fct = fib_forw_chain_type_from_fib_proto ((sa->is_tunnel_ip6 ?
- FIB_PROTOCOL_IP6 :
- FIB_PROTOCOL_IP4));
-
- fib_entry_contribute_forwarding (sa->fib_entry_index, fct, &tmp);
+ tunnel_contribute_forwarding (&sa->tunnel, &tmp);
- dpo_stack_from_node ((sa->is_tunnel_ip6 ?
- im->ah6_encrypt_node_index :
- im->ah4_encrypt_node_index),
- &sa->dpo[IPSEC_PROTOCOL_AH], &tmp);
- dpo_stack_from_node ((sa->is_tunnel_ip6 ?
- im->esp6_encrypt_node_index :
- im->esp4_encrypt_node_index),
- &sa->dpo[IPSEC_PROTOCOL_ESP], &tmp);
+ if (IPSEC_PROTOCOL_AH == sa->protocol)
+ dpo_stack_from_node ((ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ?
+ im->ah6_encrypt_node_index :
+ im->ah4_encrypt_node_index), &sa->dpo, &tmp);
+ else
+ dpo_stack_from_node ((ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ?
+ im->esp6_encrypt_node_index :
+ im->esp4_encrypt_node_index), &sa->dpo, &tmp);
dpo_reset (&tmp);
}
ipsec_main_t *im = &ipsec_main;
sa->crypto_alg = crypto_alg;
sa->crypto_iv_size = im->crypto_algs[crypto_alg].iv_size;
- sa->crypto_block_size = im->crypto_algs[crypto_alg].block_size;
- sa->crypto_enc_op_type = im->crypto_algs[crypto_alg].enc_op_type;
- sa->crypto_dec_op_type = im->crypto_algs[crypto_alg].dec_op_type;
+ sa->esp_block_align = clib_max (4, im->crypto_algs[crypto_alg].block_align);
+ sa->sync_op_data.crypto_enc_op_id = im->crypto_algs[crypto_alg].enc_op_id;
+ sa->sync_op_data.crypto_dec_op_id = im->crypto_algs[crypto_alg].dec_op_id;
+ sa->crypto_calg = im->crypto_algs[crypto_alg].alg;
+ ASSERT (sa->crypto_iv_size <= ESP_MAX_IV_SIZE);
+ ASSERT (sa->esp_block_align <= ESP_MAX_BLOCK_SIZE);
+ if (IPSEC_CRYPTO_ALG_IS_GCM (crypto_alg))
+ {
+ sa->integ_icv_size = im->crypto_algs[crypto_alg].icv_size;
+ ipsec_sa_set_IS_CTR (sa);
+ ipsec_sa_set_IS_AEAD (sa);
+ }
+ else if (IPSEC_CRYPTO_ALG_IS_CTR (crypto_alg))
+ {
+ ipsec_sa_set_IS_CTR (sa);
+ }
}
void
{
ipsec_main_t *im = &ipsec_main;
sa->integ_alg = integ_alg;
- sa->integ_trunc_size = im->integ_algs[integ_alg].trunc_size;
- sa->integ_op_type = im->integ_algs[integ_alg].op_type;
+ sa->integ_icv_size = im->integ_algs[integ_alg].icv_size;
+ sa->sync_op_data.integ_op_id = im->integ_algs[integ_alg].op_id;
+ sa->integ_calg = im->integ_algs[integ_alg].alg;
+ ASSERT (sa->integ_icv_size <= ESP_MAX_ICV_SIZE);
+}
+
+void
+ipsec_sa_set_async_op_ids (ipsec_sa_t * sa)
+{
+ /* *INDENT-OFF* */
+ if (ipsec_sa_is_set_USE_ESN (sa))
+ {
+#define _(n, s, k) \
+ if( sa->sync_op_data.crypto_enc_op_id == VNET_CRYPTO_OP_##n##_ENC ) \
+ sa->async_op_data.crypto_async_enc_op_id = \
+ VNET_CRYPTO_OP_##n##_TAG16_AAD12_ENC; \
+ if( sa->sync_op_data.crypto_dec_op_id == VNET_CRYPTO_OP_##n##_DEC ) \
+ sa->async_op_data.crypto_async_dec_op_id = \
+ VNET_CRYPTO_OP_##n##_TAG16_AAD12_DEC;
+ foreach_crypto_aead_alg
+#undef _
+ }
+ else
+ {
+#define _(n, s, k) \
+ if( sa->sync_op_data.crypto_enc_op_id == VNET_CRYPTO_OP_##n##_ENC ) \
+ sa->async_op_data.crypto_async_enc_op_id = \
+ VNET_CRYPTO_OP_##n##_TAG16_AAD8_ENC; \
+ if( sa->sync_op_data.crypto_dec_op_id == VNET_CRYPTO_OP_##n##_DEC ) \
+ sa->async_op_data.crypto_async_dec_op_id = \
+ VNET_CRYPTO_OP_##n##_TAG16_AAD8_DEC;
+ foreach_crypto_aead_alg
+#undef _
+ }
+
+#define _(c, h, s, k ,d) \
+ if( sa->sync_op_data.crypto_enc_op_id == VNET_CRYPTO_OP_##c##_ENC && \
+ sa->sync_op_data.integ_op_id == VNET_CRYPTO_OP_##h##_HMAC) \
+ sa->async_op_data.crypto_async_enc_op_id = \
+ VNET_CRYPTO_OP_##c##_##h##_TAG##d##_ENC; \
+ if( sa->sync_op_data.crypto_dec_op_id == VNET_CRYPTO_OP_##c##_DEC && \
+ sa->sync_op_data.integ_op_id == VNET_CRYPTO_OP_##h##_HMAC) \
+ sa->async_op_data.crypto_async_dec_op_id = \
+ VNET_CRYPTO_OP_##c##_##h##_TAG##d##_DEC;
+ foreach_crypto_link_async_alg
+#undef _
+ /* *INDENT-ON* */
}
int
-ipsec_sa_add (u32 id,
- u32 spi,
- ipsec_protocol_t proto,
- ipsec_crypto_alg_t crypto_alg,
- const ipsec_key_t * ck,
- ipsec_integ_alg_t integ_alg,
- const ipsec_key_t * ik,
- ipsec_sa_flags_t flags,
- u32 tx_table_id,
- const ip46_address_t * tun_src,
- const ip46_address_t * tun_dst, u32 * sa_out_index)
+ipsec_sa_add_and_lock (u32 id, u32 spi, ipsec_protocol_t proto,
+ ipsec_crypto_alg_t crypto_alg, const ipsec_key_t *ck,
+ ipsec_integ_alg_t integ_alg, const ipsec_key_t *ik,
+ ipsec_sa_flags_t flags, u32 salt, u16 src_port,
+ u16 dst_port, const tunnel_t *tun, u32 *sa_out_index)
{
+ vlib_main_t *vm = vlib_get_main ();
ipsec_main_t *im = &ipsec_main;
clib_error_t *err;
ipsec_sa_t *sa;
u32 sa_index;
uword *p;
+ int rv;
p = hash_get (im->sa_index_by_sa_id, id);
if (p)
return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
- pool_get_zero (im->sad, sa);
+ pool_get_aligned_zero (ipsec_sa_pool, sa, CLIB_CACHE_LINE_BYTES);
fib_node_init (&sa->node, FIB_NODE_TYPE_IPSEC_SA);
- sa_index = sa - im->sad;
+ fib_node_lock (&sa->node);
+ sa_index = sa - ipsec_sa_pool;
vlib_validate_combined_counter (&ipsec_sa_counters, sa_index);
vlib_zero_combined_counter (&ipsec_sa_counters, sa_index);
+ tunnel_copy (tun, &sa->tunnel);
sa->id = id;
sa->spi = spi;
sa->stat_index = sa_index;
sa->protocol = proto;
+ sa->flags = flags;
+ sa->salt = salt;
+ sa->thread_index = (vlib_num_workers ()) ? ~0 : 0;
+ if (integ_alg != IPSEC_INTEG_ALG_NONE)
+ {
+ ipsec_sa_set_integ_alg (sa, integ_alg);
+ clib_memcpy (&sa->integ_key, ik, sizeof (sa->integ_key));
+ }
ipsec_sa_set_crypto_alg (sa, crypto_alg);
+ ipsec_sa_set_async_op_ids (sa);
+
clib_memcpy (&sa->crypto_key, ck, sizeof (sa->crypto_key));
- ipsec_sa_set_integ_alg (sa, integ_alg);
- clib_memcpy (&sa->integ_key, ik, sizeof (sa->integ_key));
- ip46_address_copy (&sa->tunnel_src_addr, tun_src);
- ip46_address_copy (&sa->tunnel_dst_addr, tun_dst);
-
- if (flags & IPSEC_SA_FLAG_USE_EXTENDED_SEQ_NUM)
- sa->use_esn = 1;
- if (flags & IPSEC_SA_FLAG_USE_ANTI_REPLAY)
- sa->use_anti_replay = 1;
- if (flags & IPSEC_SA_FLAG_IS_TUNNEL)
- sa->is_tunnel = 1;
- if (flags & IPSEC_SA_FLAG_IS_TUNNEL_V6)
- sa->is_tunnel_ip6 = 1;
- if (flags & IPSEC_SA_FLAG_UDP_ENCAP)
- sa->udp_encap = 1;
+
+ sa->crypto_key_index = vnet_crypto_key_add (vm,
+ im->crypto_algs[crypto_alg].alg,
+ (u8 *) ck->data, ck->len);
+ if (~0 == sa->crypto_key_index)
+ {
+ pool_put (ipsec_sa_pool, sa);
+ return VNET_API_ERROR_KEY_LENGTH;
+ }
+
+ if (integ_alg != IPSEC_INTEG_ALG_NONE)
+ {
+ sa->integ_key_index = vnet_crypto_key_add (vm,
+ im->
+ integ_algs[integ_alg].alg,
+ (u8 *) ik->data, ik->len);
+ if (~0 == sa->integ_key_index)
+ {
+ pool_put (ipsec_sa_pool, sa);
+ return VNET_API_ERROR_KEY_LENGTH;
+ }
+ }
+
+ if (sa->async_op_data.crypto_async_enc_op_id &&
+ !ipsec_sa_is_set_IS_AEAD (sa))
+ { //AES-CBC & HMAC
+ sa->async_op_data.linked_key_index =
+ vnet_crypto_key_add_linked (vm, sa->crypto_key_index,
+ sa->integ_key_index);
+ }
+
+ if (im->async_mode)
+ sa->crypto_op_data = sa->async_op_data.data;
+ else
+ {
+ if (ipsec_sa_is_set_IS_ASYNC (sa))
+ {
+ vnet_crypto_request_async_mode (1);
+ sa->crypto_op_data = sa->async_op_data.data;
+ }
+ else
+ sa->crypto_op_data = sa->sync_op_data.data;
+ }
err = ipsec_check_support_cb (im, sa);
if (err)
{
clib_warning ("%s", err->what);
- pool_put (im->sad, sa);
+ pool_put (ipsec_sa_pool, sa);
return VNET_API_ERROR_UNIMPLEMENTED;
}
err = ipsec_call_add_del_callbacks (im, sa, sa_index, 1);
if (err)
{
- pool_put (im->sad, sa);
+ pool_put (ipsec_sa_pool, sa);
return VNET_API_ERROR_SYSCALL_ERROR_1;
}
- if (sa->is_tunnel)
+ if (ipsec_sa_is_set_IS_TUNNEL (sa) && !ipsec_sa_is_set_IS_INBOUND (sa))
{
- fib_protocol_t fproto = (sa->is_tunnel_ip6 ?
- FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4);
- fib_prefix_t pfx = {
- .fp_addr = sa->tunnel_dst_addr,
- .fp_len = (sa->is_tunnel_ip6 ? 128 : 32),
- .fp_proto = fproto,
- };
- sa->tx_fib_index = fib_table_find (fproto, tx_table_id);
- if (sa->tx_fib_index == ~((u32) 0))
+ sa->tunnel_flags = sa->tunnel.t_encap_decap_flags;
+
+ rv = tunnel_resolve (&sa->tunnel, FIB_NODE_TYPE_IPSEC_SA, sa_index);
+
+ if (rv)
{
- pool_put (im->sad, sa);
- return VNET_API_ERROR_NO_SUCH_FIB;
+ pool_put (ipsec_sa_pool, sa);
+ return rv;
}
-
- sa->fib_entry_index = fib_table_entry_special_add (sa->tx_fib_index,
- &pfx,
- FIB_SOURCE_RR,
- FIB_ENTRY_FLAG_NONE);
- sa->sibling = fib_entry_child_add (sa->fib_entry_index,
- FIB_NODE_TYPE_IPSEC_SA, sa_index);
ipsec_sa_stack (sa);
+
+ /* generate header templates */
+ if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa))
+ {
+ tunnel_build_v6_hdr (&sa->tunnel,
+ (ipsec_sa_is_set_UDP_ENCAP (sa) ?
+ IP_PROTOCOL_UDP :
+ IP_PROTOCOL_IPSEC_ESP),
+ &sa->ip6_hdr);
+ }
+ else
+ {
+ tunnel_build_v4_hdr (&sa->tunnel,
+ (ipsec_sa_is_set_UDP_ENCAP (sa) ?
+ IP_PROTOCOL_UDP :
+ IP_PROTOCOL_IPSEC_ESP),
+ &sa->ip4_hdr);
+ }
+ }
+
+ if (ipsec_sa_is_set_UDP_ENCAP (sa))
+ {
+ if (dst_port == IPSEC_UDP_PORT_NONE)
+ sa->udp_hdr.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
+ else
+ sa->udp_hdr.dst_port = clib_host_to_net_u16 (dst_port);
+
+ if (src_port == IPSEC_UDP_PORT_NONE)
+ sa->udp_hdr.src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
+ else
+ sa->udp_hdr.src_port = clib_host_to_net_u16 (src_port);
+
+ if (ipsec_sa_is_set_IS_INBOUND (sa))
+ ipsec_register_udp_port (clib_host_to_net_u16 (sa->udp_hdr.dst_port));
}
+
hash_set (im->sa_index_by_sa_id, sa->id, sa_index);
if (sa_out_index)
return (0);
}
-u32
-ipsec_sa_del (u32 id)
+static void
+ipsec_sa_del (ipsec_sa_t * sa)
{
+ vlib_main_t *vm = vlib_get_main ();
ipsec_main_t *im = &ipsec_main;
- ipsec_sa_t *sa = 0;
- uword *p;
u32 sa_index;
- clib_error_t *err;
- p = hash_get (im->sa_index_by_sa_id, id);
+ sa_index = sa - ipsec_sa_pool;
+ hash_unset (im->sa_index_by_sa_id, sa->id);
+ tunnel_unresolve (&sa->tunnel);
+
+ /* no recovery possible when deleting an SA */
+ (void) ipsec_call_add_del_callbacks (im, sa, sa_index, 0);
+
+ if (ipsec_sa_is_set_IS_ASYNC (sa))
+ vnet_crypto_request_async_mode (0);
+ if (ipsec_sa_is_set_UDP_ENCAP (sa) && ipsec_sa_is_set_IS_INBOUND (sa))
+ ipsec_unregister_udp_port (clib_net_to_host_u16 (sa->udp_hdr.dst_port));
+
+ if (ipsec_sa_is_set_IS_TUNNEL (sa) && !ipsec_sa_is_set_IS_INBOUND (sa))
+ dpo_reset (&sa->dpo);
+ vnet_crypto_key_del (vm, sa->crypto_key_index);
+ if (sa->integ_alg != IPSEC_INTEG_ALG_NONE)
+ vnet_crypto_key_del (vm, sa->integ_key_index);
+ pool_put (ipsec_sa_pool, sa);
+}
- if (!p)
- return VNET_API_ERROR_NO_SUCH_ENTRY;
+void
+ipsec_sa_unlock (index_t sai)
+{
+ ipsec_sa_t *sa;
- sa_index = p[0];
- sa = pool_elt_at_index (im->sad, sa_index);
- if (ipsec_is_sa_used (sa_index))
- {
- clib_warning ("sa_id %u used in policy", sa->id);
- /* sa used in policy */
- return VNET_API_ERROR_SYSCALL_ERROR_1;
- }
- hash_unset (im->sa_index_by_sa_id, sa->id);
- err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0);
- if (err)
- return VNET_API_ERROR_SYSCALL_ERROR_1;
- if (sa->is_tunnel)
- {
- fib_entry_child_remove (sa->fib_entry_index, sa->sibling);
- fib_table_entry_special_remove
- (sa->tx_fib_index,
- fib_entry_get_prefix (sa->fib_entry_index), FIB_SOURCE_RR);
- dpo_reset (&sa->dpo[IPSEC_PROTOCOL_AH]);
- dpo_reset (&sa->dpo[IPSEC_PROTOCOL_ESP]);
- }
- pool_put (im->sad, sa);
- return 0;
+ if (INDEX_INVALID == sai)
+ return;
+
+ sa = ipsec_sa_get (sai);
+
+ fib_node_unlock (&sa->node);
}
-u8
-ipsec_is_sa_used (u32 sa_index)
+void
+ipsec_sa_lock (index_t sai)
{
- ipsec_main_t *im = &ipsec_main;
- ipsec_tunnel_if_t *t;
- ipsec_policy_t *p;
+ ipsec_sa_t *sa;
- /* *INDENT-OFF* */
- pool_foreach(p, im->policies, ({
- if (p->policy == IPSEC_POLICY_ACTION_PROTECT)
- {
- if (p->sa_index == sa_index)
- return 1;
- }
- }));
-
- pool_foreach(t, im->tunnel_interfaces, ({
- if (t->input_sa_index == sa_index)
- return 1;
- if (t->output_sa_index == sa_index)
- return 1;
- }));
- /* *INDENT-ON* */
+ if (INDEX_INVALID == sai)
+ return;
- return 0;
+ sa = ipsec_sa_get (sai);
+
+ fib_node_lock (&sa->node);
}
-int
-ipsec_set_sa_key (u32 id, const ipsec_key_t * ck, const ipsec_key_t * ik)
+index_t
+ipsec_sa_find_and_lock (u32 id)
{
ipsec_main_t *im = &ipsec_main;
+ ipsec_sa_t *sa;
uword *p;
- u32 sa_index;
- ipsec_sa_t *sa = 0;
- clib_error_t *err;
p = hash_get (im->sa_index_by_sa_id, id);
- if (!p)
- return VNET_API_ERROR_SYSCALL_ERROR_1; /* no such sa-id */
-
- sa_index = p[0];
- sa = pool_elt_at_index (im->sad, sa_index);
- /* new crypto key */
- if (ck)
- {
- clib_memcpy (&sa->crypto_key, ck, sizeof (sa->crypto_key));
- }
+ if (!p)
+ return INDEX_INVALID;
- /* new integ key */
- if (ik)
- {
- clib_memcpy (&sa->integ_key, 0, sizeof (sa->integ_key));
- }
+ sa = ipsec_sa_get (p[0]);
- if (ck || ik)
- {
- err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0);
- if (err)
- {
- clib_error_free (err);
- return VNET_API_ERROR_SYSCALL_ERROR_1;
- }
- }
+ fib_node_lock (&sa->node);
- return 0;
+ return (p[0]);
}
-u32
-ipsec_get_sa_index_by_sa_id (u32 sa_id)
+int
+ipsec_sa_unlock_id (u32 id)
{
ipsec_main_t *im = &ipsec_main;
- uword *p = hash_get (im->sa_index_by_sa_id, sa_id);
+ uword *p;
+
+ p = hash_get (im->sa_index_by_sa_id, id);
+
if (!p)
- return ~0;
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+ ipsec_sa_unlock (p[0]);
+
+ return (0);
+}
- return p[0];
+void
+ipsec_sa_clear (index_t sai)
+{
+ vlib_zero_combined_counter (&ipsec_sa_counters, sai);
}
void
ipsec_sa_walk (ipsec_sa_walk_cb_t cb, void *ctx)
{
- ipsec_main_t *im = &ipsec_main;
ipsec_sa_t *sa;
/* *INDENT-OFF* */
- pool_foreach (sa, im->sad,
- ({
- if (WALK_CONTINUE != cb(sa, ctx))
- break;
- }));
+ pool_foreach (sa, ipsec_sa_pool)
+ {
+ if (WALK_CONTINUE != cb (sa, ctx))
+ break;
+ }
/* *INDENT-ON* */
}
static fib_node_t *
ipsec_sa_fib_node_get (fib_node_index_t index)
{
- ipsec_main_t *im;
ipsec_sa_t *sa;
- im = &ipsec_main;
- sa = pool_elt_at_index (im->sad, index);
+ sa = ipsec_sa_get (index);
return (&sa->node);
}
+static ipsec_sa_t *
+ipsec_sa_from_fib_node (fib_node_t * node)
+{
+ ASSERT (FIB_NODE_TYPE_IPSEC_SA == node->fn_type);
+ return ((ipsec_sa_t *) (((char *) node) -
+ STRUCT_OFFSET_OF (ipsec_sa_t, node)));
+
+}
+
/**
* Function definition to inform the FIB node that its last lock has gone.
*/
* The ipsec SA is a root of the graph. As such
* it never has children and thus is never locked.
*/
- ASSERT (0);
-}
-
-static ipsec_sa_t *
-ipsec_sa_from_fib_node (fib_node_t * node)
-{
- ASSERT (FIB_NODE_TYPE_IPSEC_SA == node->fn_type);
- return ((ipsec_sa_t *) (((char *) node) -
- STRUCT_OFFSET_OF (ipsec_sa_t, node)));
-
+ ipsec_sa_del (ipsec_sa_from_fib_node (node));
}
/**
}
/*
- * Virtual function table registered by MPLS GRE tunnels
+ * Virtual function table registered by SAs
* for participation in the FIB object graph.
*/
const static fib_node_vft_t ipsec_sa_vft = {
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