X-Git-Url: https://gerrit.fd.io/r/gitweb?p=vpp.git;a=blobdiff_plain;f=src%2Fvnet%2Fipsec%2Fipsec_sa.c;h=0e1e63d0db4ab16b976ba5c0f5bf88c027e22c74;hp=3d62395bd7c78040c308a2813789f4ba6e062e24;hb=e5d34919b;hpb=d709cbcb1ef80633af657c5427608831e5bbd919 diff --git a/src/vnet/ipsec/ipsec_sa.c b/src/vnet/ipsec/ipsec_sa.c index 3d62395bd7c..0e1e63d0db4 100644 --- a/src/vnet/ipsec/ipsec_sa.c +++ b/src/vnet/ipsec/ipsec_sa.c @@ -17,6 +17,8 @@ #include #include #include +#include +#include /** * @brief @@ -66,7 +68,7 @@ ipsec_mk_key (ipsec_key_t * key, const u8 * data, u8 len) /** * '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; @@ -80,14 +82,14 @@ ipsec_sa_stack (ipsec_sa_t * sa) fib_entry_contribute_forwarding (sa->fib_entry_index, fct, &tmp); - dpo_stack_from_node ((ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? - im->ah6_encrypt_node_index : - im->ah4_encrypt_node_index), - &sa->dpo[IPSEC_PROTOCOL_AH], &tmp); - dpo_stack_from_node ((ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? - 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); } @@ -98,9 +100,16 @@ ipsec_sa_set_crypto_alg (ipsec_sa_t * sa, ipsec_crypto_alg_t crypto_alg) 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->crypto_enc_op_id = im->crypto_algs[crypto_alg].enc_op_id; + sa->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->crypto_block_size <= 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_AEAD (sa); + } } void @@ -108,24 +117,28 @@ ipsec_sa_set_integ_alg (ipsec_sa_t * sa, ipsec_integ_alg_t integ_alg) { 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; - ASSERT (sa->integ_trunc_size <= ESP_MAX_ICV_SIZE); + sa->integ_icv_size = im->integ_algs[integ_alg].icv_size; + sa->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); } 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 tx_table_id, + u32 salt, + const ip46_address_t * tun_src, + const ip46_address_t * tun_dst, u32 * sa_out_index, + u16 dst_port) { + vlib_main_t *vm = vlib_get_main (); ipsec_main_t *im = &ipsec_main; clib_error_t *err; ipsec_sa_t *sa; @@ -139,6 +152,7 @@ ipsec_sa_add (u32 id, pool_get_aligned_zero (im->sad, sa, CLIB_CACHE_LINE_BYTES); fib_node_init (&sa->node, FIB_NODE_TYPE_IPSEC_SA); + fib_node_lock (&sa->node); sa_index = sa - im->sad; vlib_validate_combined_counter (&ipsec_sa_counters, sa_index); @@ -148,23 +162,41 @@ ipsec_sa_add (u32 id, sa->spi = spi; sa->stat_index = sa_index; sa->protocol = proto; + sa->flags = flags; + sa->salt = salt; + sa->encrypt_thread_index = (vlib_num_workers ())? ~0 : 0; + sa->decrypt_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); 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) - ipsec_sa_set_USE_EXTENDED_SEQ_NUM (sa); - if (flags & IPSEC_SA_FLAG_USE_ANTI_REPLAY) - ipsec_sa_set_USE_ANTI_REPLAY (sa); - if (flags & IPSEC_SA_FLAG_IS_TUNNEL) - ipsec_sa_set_IS_TUNNEL (sa); - if (flags & IPSEC_SA_FLAG_IS_TUNNEL_V6) - ipsec_sa_set_IS_TUNNEL_V6 (sa); - if (flags & IPSEC_SA_FLAG_UDP_ENCAP) - ipsec_sa_set_UDP_ENCAP (sa); + 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 (im->sad, 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 (im->sad, sa); + return VNET_API_ERROR_KEY_LENGTH; + } + } err = ipsec_check_support_cb (im, sa); if (err) @@ -181,7 +213,7 @@ ipsec_sa_add (u32 id, return VNET_API_ERROR_SYSCALL_ERROR_1; } - if (ipsec_sa_is_set_IS_TUNNEL (sa)) + if (ipsec_sa_is_set_IS_TUNNEL (sa) && !ipsec_sa_is_set_IS_INBOUND (sa)) { fib_protocol_t fproto = (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4); @@ -197,12 +229,10 @@ ipsec_sa_add (u32 id, return VNET_API_ERROR_NO_SUCH_FIB; } - 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); + sa->fib_entry_index = fib_entry_track (sa->tx_fib_index, + &pfx, + FIB_NODE_TYPE_IPSEC_SA, + sa_index, &sa->sibling); ipsec_sa_stack (sa); /* generate header templates */ @@ -240,8 +270,16 @@ ipsec_sa_add (u32 id, if (ipsec_sa_is_set_UDP_ENCAP (sa)) { - sa->udp_hdr.src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec); - sa->udp_hdr.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec); + if (dst_port == IPSEC_UDP_PORT_NONE) + { + sa->udp_hdr.src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec); + sa->udp_hdr.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec); + } + else + { + sa->udp_hdr.src_port = clib_host_to_net_u16 (dst_port); + sa->udp_hdr.dst_port = clib_host_to_net_u16 (dst_port); + } } hash_set (im->sa_index_by_sa_id, sa->id, sa_index); @@ -252,123 +290,97 @@ ipsec_sa_add (u32 id, 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); - - if (!p) - return VNET_API_ERROR_NO_SUCH_ENTRY; - - 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; - } + sa_index = sa - im->sad; 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 (ipsec_sa_is_set_IS_TUNNEL (sa)) + /* no recovery possible when deleting an SA */ + (void) ipsec_call_add_del_callbacks (im, sa, sa_index, 0); + + if (ipsec_sa_is_set_IS_TUNNEL (sa) && !ipsec_sa_is_set_IS_INBOUND (sa)) { - 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]); + fib_entry_untrack (sa->fib_entry_index, sa->sibling); + 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 (im->sad, sa); - return 0; } -u8 -ipsec_is_sa_used (u32 sa_index) +void +ipsec_sa_unlock (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; - } - })); + if (INDEX_INVALID == sai) + return; - 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* */ + sa = pool_elt_at_index (im->sad, sai); - return 0; + fib_node_unlock (&sa->node); } -int -ipsec_set_sa_key (u32 id, const ipsec_key_t * ck, const ipsec_key_t * ik) +void +ipsec_sa_lock (index_t sai) +{ + ipsec_main_t *im = &ipsec_main; + ipsec_sa_t *sa; + + if (INDEX_INVALID == sai) + return; + + sa = pool_elt_at_index (im->sad, 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; - 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); + if (!p) + return INDEX_INVALID; - /* new crypto key */ - if (ck) - { - clib_memcpy (&sa->crypto_key, ck, sizeof (sa->crypto_key)); - } + sa = pool_elt_at_index (im->sad, p[0]); - /* new integ key */ - if (ik) - { - clib_memcpy (&sa->integ_key, 0, sizeof (sa->integ_key)); - } + fib_node_lock (&sa->node); - 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; - } - } - - 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; - return p[0]; + ipsec_sa_unlock (p[0]); + + return (0); +} + +void +ipsec_sa_clear (index_t sai) +{ + vlib_zero_combined_counter (&ipsec_sa_counters, sai); } void @@ -401,6 +413,15 @@ ipsec_sa_fib_node_get (fib_node_index_t 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. */ @@ -411,16 +432,7 @@ 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. */ - 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)); } /** @@ -435,7 +447,7 @@ ipsec_sa_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx) } /* - * 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 = {