*/
#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
+ * SA packet & bytes counters
+ */
+vlib_combined_counter_main_t ipsec_sa_counters = {
+ .name = "SA",
+ .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,
return 0;
}
-int
-ipsec_add_del_sa (vlib_main_t * vm, ipsec_sa_t * new_sa, int is_add)
+void
+ipsec_mk_key (ipsec_key_t * key, const u8 * data, u8 len)
+{
+ memset (key, 0, sizeof (*key));
+
+ if (len > sizeof (key->data))
+ key->len = sizeof (key->data);
+ else
+ key->len = len;
+
+ memcpy (key->data, data, key->len);
+}
+
+/**
+ * 'stack' (resolve the recursion for) the SA tunnel destination
+ */
+static void
+ipsec_sa_stack (ipsec_sa_t * sa)
{
ipsec_main_t *im = &ipsec_main;
- ipsec_sa_t *sa = 0;
- uword *p;
- u32 sa_index;
- clib_error_t *err;
+ dpo_id_t tmp = DPO_INVALID;
- clib_warning ("id %u spi %u", new_sa->id, new_sa->spi);
+ tunnel_contribute_forwarding (&sa->tunnel, &tmp);
- p = hash_get (im->sa_index_by_sa_id, new_sa->id);
- if (p && is_add)
- return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
- if (!p && !is_add)
- return VNET_API_ERROR_NO_SUCH_ENTRY;
+ 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);
+}
- if (!is_add) /* delete */
+void
+ipsec_sa_set_crypto_alg (ipsec_sa_t * sa, ipsec_crypto_alg_t crypto_alg)
+{
+ ipsec_main_t *im = &ipsec_main;
+ sa->crypto_alg = crypto_alg;
+ sa->crypto_iv_size = im->crypto_algs[crypto_alg].iv_size;
+ 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_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);
- return VNET_API_ERROR_SYSCALL_ERROR_1; /* sa used in policy */
- }
- 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;
- pool_put (im->sad, sa);
+ sa->integ_icv_size = im->crypto_algs[crypto_alg].icv_size;
+ ipsec_sa_set_IS_CTR (sa);
+ ipsec_sa_set_IS_AEAD (sa);
}
- else /* create new SA */
+ else if (IPSEC_CRYPTO_ALG_IS_CTR (crypto_alg))
{
- pool_get (im->sad, sa);
- clib_memcpy (sa, new_sa, sizeof (*sa));
- sa_index = sa - im->sad;
- hash_set (im->sa_index_by_sa_id, sa->id, sa_index);
- err = ipsec_call_add_del_callbacks (im, sa, sa_index, 1);
- if (err)
- return VNET_API_ERROR_SYSCALL_ERROR_1;
+ ipsec_sa_set_IS_CTR (sa);
}
- return 0;
}
-u8
-ipsec_is_sa_used (u32 sa_index)
+void
+ipsec_sa_set_integ_alg (ipsec_sa_t * sa, ipsec_integ_alg_t integ_alg)
{
ipsec_main_t *im = &ipsec_main;
- ipsec_tunnel_if_t *t;
- ipsec_policy_t *p;
+ sa->integ_alg = integ_alg;
+ 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* */
- 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 (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 _
+ }
- return 0;
+#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_set_sa_key (vlib_main_t * vm, ipsec_sa_t * sa_update)
+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;
- uword *p;
- u32 sa_index;
- ipsec_sa_t *sa = 0;
clib_error_t *err;
+ ipsec_sa_t *sa;
+ u32 sa_index;
+ uword *p;
+ int rv;
- p = hash_get (im->sa_index_by_sa_id, sa_update->id);
- if (!p)
- return VNET_API_ERROR_SYSCALL_ERROR_1; /* no such sa-id */
+ p = hash_get (im->sa_index_by_sa_id, id);
+ if (p)
+ return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
+
+ pool_get_aligned_zero (ipsec_sa_pool, sa, CLIB_CACHE_LINE_BYTES);
+
+ fib_node_init (&sa->node, FIB_NODE_TYPE_IPSEC_SA);
+ fib_node_lock (&sa->node);
+ sa_index = sa - ipsec_sa_pool;
- sa_index = p[0];
- sa = pool_elt_at_index (im->sad, sa_index);
+ vlib_validate_combined_counter (&ipsec_sa_counters, sa_index);
+ vlib_zero_combined_counter (&ipsec_sa_counters, sa_index);
- /* new crypto key */
- if (0 < sa_update->crypto_key_len)
+ 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)
{
- clib_memcpy (sa->crypto_key, sa_update->crypto_key,
- sa_update->crypto_key_len);
- sa->crypto_key_len = sa_update->crypto_key_len;
+ 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);
- /* new integ key */
- if (0 < sa_update->integ_key_len)
+ clib_memcpy (&sa->crypto_key, ck, sizeof (sa->crypto_key));
+
+ 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)
{
- clib_memcpy (sa->integ_key, sa_update->integ_key,
- sa_update->integ_key_len);
- sa->integ_key_len = sa_update->integ_key_len;
+ pool_put (ipsec_sa_pool, sa);
+ return VNET_API_ERROR_KEY_LENGTH;
}
- if (0 < sa_update->crypto_key_len || 0 < sa_update->integ_key_len)
+ if (integ_alg != IPSEC_INTEG_ALG_NONE)
{
- err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0);
- if (err)
- return VNET_API_ERROR_SYSCALL_ERROR_1;
+ 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;
+ }
}
- return 0;
+ 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 (ipsec_sa_pool, sa);
+ return VNET_API_ERROR_UNIMPLEMENTED;
+ }
+
+ err = ipsec_call_add_del_callbacks (im, sa, sa_index, 1);
+ if (err)
+ {
+ pool_put (ipsec_sa_pool, sa);
+ return VNET_API_ERROR_SYSCALL_ERROR_1;
+ }
+
+ if (ipsec_sa_is_set_IS_TUNNEL (sa) && !ipsec_sa_is_set_IS_INBOUND (sa))
+ {
+ 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 (ipsec_sa_pool, sa);
+ return rv;
+ }
+ 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)
+ *sa_out_index = sa_index;
+
+ return (0);
}
-u32
-ipsec_get_sa_index_by_sa_id (u32 sa_id)
+static void
+ipsec_sa_del (ipsec_sa_t * sa)
{
+ vlib_main_t *vm = vlib_get_main ();
ipsec_main_t *im = &ipsec_main;
- uword *p = hash_get (im->sa_index_by_sa_id, sa_id);
+ u32 sa_index;
+
+ 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);
+}
+
+void
+ipsec_sa_unlock (index_t sai)
+{
+ ipsec_sa_t *sa;
+
+ if (INDEX_INVALID == sai)
+ return;
+
+ sa = ipsec_sa_get (sai);
+
+ fib_node_unlock (&sa->node);
+}
+
+void
+ipsec_sa_lock (index_t sai)
+{
+ ipsec_sa_t *sa;
+
+ if (INDEX_INVALID == sai)
+ return;
+
+ sa = ipsec_sa_get (sai);
+
+ fib_node_lock (&sa->node);
+}
+
+index_t
+ipsec_sa_find_and_lock (u32 id)
+{
+ ipsec_main_t *im = &ipsec_main;
+ ipsec_sa_t *sa;
+ uword *p;
+
+ p = hash_get (im->sa_index_by_sa_id, id);
+
if (!p)
- return ~0;
+ return INDEX_INVALID;
+
+ sa = ipsec_sa_get (p[0]);
+
+ fib_node_lock (&sa->node);
- return p[0];
+ return (p[0]);
}
+int
+ipsec_sa_unlock_id (u32 id)
+{
+ ipsec_main_t *im = &ipsec_main;
+ uword *p;
+
+ p = hash_get (im->sa_index_by_sa_id, id);
+
+ if (!p)
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+ ipsec_sa_unlock (p[0]);
+
+ return (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_sa_t *sa;
+
+ /* *INDENT-OFF* */
+ pool_foreach (sa, ipsec_sa_pool)
+ {
+ if (WALK_CONTINUE != cb (sa, ctx))
+ break;
+ }
+ /* *INDENT-ON* */
+}
+
+/**
+ * Function definition to get a FIB node from its index
+ */
+static fib_node_t *
+ipsec_sa_fib_node_get (fib_node_index_t index)
+{
+ ipsec_sa_t *sa;
+
+ 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.
+ */
+static void
+ipsec_sa_last_lock_gone (fib_node_t * node)
+{
+ /*
+ * The ipsec SA is a root of the graph. As such
+ * it never has children and thus is never locked.
+ */
+ ipsec_sa_del (ipsec_sa_from_fib_node (node));
+}
+
+/**
+ * Function definition to backwalk a FIB node
+ */
+static fib_node_back_walk_rc_t
+ipsec_sa_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx)
+{
+ ipsec_sa_stack (ipsec_sa_from_fib_node (node));
+
+ return (FIB_NODE_BACK_WALK_CONTINUE);
+}
+
+/*
+ * Virtual function table registered by SAs
+ * for participation in the FIB object graph.
+ */
+const static fib_node_vft_t ipsec_sa_vft = {
+ .fnv_get = ipsec_sa_fib_node_get,
+ .fnv_last_lock = ipsec_sa_last_lock_gone,
+ .fnv_back_walk = ipsec_sa_back_walk,
+};
+
+/* force inclusion from application's main.c */
+clib_error_t *
+ipsec_sa_interface_init (vlib_main_t * vm)
+{
+ fib_node_register_type (FIB_NODE_TYPE_IPSEC_SA, &ipsec_sa_vft);
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (ipsec_sa_interface_init);
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff