X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fipsec%2Fipsec_sa.c;h=8e8546985ecca7c70f7444fbb8a201c70507ca9d;hb=e6be702362299566990678f505512b1b74b49112;hp=f20d941fd6895ec32933834524cd58a2d85f18e3;hpb=8d7c502002636da1cb7c71a87757f328e7c2c4fd;p=vpp.git diff --git a/src/vnet/ipsec/ipsec_sa.c b/src/vnet/ipsec/ipsec_sa.c index f20d941fd68..8e8546985ec 100644 --- a/src/vnet/ipsec/ipsec_sa.c +++ b/src/vnet/ipsec/ipsec_sa.c @@ -14,8 +14,20 @@ */ #include +#include +#include #include +/** + * @brief + * SA packet & bytes counters + */ +vlib_combined_counter_main_t ipsec_sa_counters = { + .name = "SA", + .stat_segment_name = "/net/ipsec/sa", +}; + + static clib_error_t * ipsec_call_add_del_callbacks (ipsec_main_t * im, ipsec_sa_t * sa, u32 sa_index, int is_add) @@ -57,27 +69,56 @@ ipsec_mk_key (ipsec_key_t * key, const u8 * data, u8 len) 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; - vlib_node_t *node; - fct = fib_forw_chain_type_from_fib_proto ((sa->is_tunnel_ip6 ? - FIB_PROTOCOL_IP6 : - FIB_PROTOCOL_IP4)); + fct = + fib_forw_chain_type_from_fib_proto ((ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? + FIB_PROTOCOL_IP6 : + FIB_PROTOCOL_IP4)); fib_entry_contribute_forwarding (sa->fib_entry_index, fct, &tmp); - node = vlib_get_node_by_name (vlib_get_main (), - (sa->is_tunnel_ip6 ? - (u8 *) "ah6-encrypt" : - (u8 *) "ah4-encrypt")); - dpo_stack_from_node (node->index, &sa->dpo[IPSEC_PROTOCOL_AH], &tmp); - - node = vlib_get_node_by_name (vlib_get_main (), - (sa->is_tunnel_ip6 ? - (u8 *) "esp6-encrypt" : - (u8 *) "esp4-encrypt")); - dpo_stack_from_node (node->index, &sa->dpo[IPSEC_PROTOCOL_ESP], &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); + dpo_reset (&tmp); +} + +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->crypto_block_size = im->crypto_algs[crypto_alg].block_size; + 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 +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_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 @@ -90,9 +131,11 @@ ipsec_sa_add (u32 id, 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) { + vlib_main_t *vm = vlib_get_main (); ipsec_main_t *im = &ipsec_main; clib_error_t *err; ipsec_sa_t *sa; @@ -103,31 +146,44 @@ ipsec_sa_add (u32 id, if (p) return VNET_API_ERROR_ENTRY_ALREADY_EXISTS; - pool_get_zero (im->sad, sa); + pool_get_aligned_zero (im->sad, sa, CLIB_CACHE_LINE_BYTES); fib_node_init (&sa->node, FIB_NODE_TYPE_IPSEC_SA); sa_index = sa - im->sad; + vlib_validate_combined_counter (&ipsec_sa_counters, sa_index); + vlib_zero_combined_counter (&ipsec_sa_counters, sa_index); + sa->id = id; sa->spi = spi; + sa->stat_index = sa_index; sa->protocol = proto; - sa->crypto_alg = crypto_alg; - clib_memcpy (&sa->crypto_key, ck, sizeof (sa->crypto_key)); - sa->integ_alg = integ_alg; + sa->flags = flags; + sa->salt = salt; + 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)); 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 (im->sad, sa); + return VNET_API_ERROR_KEY_LENGTH; + } + + 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) @@ -144,13 +200,13 @@ ipsec_sa_add (u32 id, 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_t fproto = (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? 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_len = (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? 128 : 32), .fp_proto = fproto, }; sa->tx_fib_index = fib_table_find (fproto, tx_table_id); @@ -167,7 +223,46 @@ ipsec_sa_add (u32 id, 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)) + { + sa->ip6_hdr.ip_version_traffic_class_and_flow_label = 0x60; + sa->ip6_hdr.hop_limit = 254; + sa->ip6_hdr.src_address.as_u64[0] = + sa->tunnel_src_addr.ip6.as_u64[0]; + sa->ip6_hdr.src_address.as_u64[1] = + sa->tunnel_src_addr.ip6.as_u64[1]; + sa->ip6_hdr.dst_address.as_u64[0] = + sa->tunnel_dst_addr.ip6.as_u64[0]; + sa->ip6_hdr.dst_address.as_u64[1] = + sa->tunnel_dst_addr.ip6.as_u64[1]; + if (ipsec_sa_is_set_UDP_ENCAP (sa)) + sa->ip6_hdr.protocol = IP_PROTOCOL_UDP; + else + sa->ip6_hdr.protocol = IP_PROTOCOL_IPSEC_ESP; + } + else + { + sa->ip4_hdr.ip_version_and_header_length = 0x45; + sa->ip4_hdr.ttl = 254; + sa->ip4_hdr.src_address.as_u32 = sa->tunnel_src_addr.ip4.as_u32; + sa->ip4_hdr.dst_address.as_u32 = sa->tunnel_dst_addr.ip4.as_u32; + + if (ipsec_sa_is_set_UDP_ENCAP (sa)) + sa->ip4_hdr.protocol = IP_PROTOCOL_UDP; + else + sa->ip4_hdr.protocol = IP_PROTOCOL_IPSEC_ESP; + sa->ip4_hdr.checksum = ip4_header_checksum (&sa->ip4_hdr); + } } + + 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); + } + hash_set (im->sa_index_by_sa_id, sa->id, sa_index); if (sa_out_index) @@ -179,6 +274,7 @@ ipsec_sa_add (u32 id, u32 ipsec_sa_del (u32 id) { + vlib_main_t *vm = vlib_get_main (); ipsec_main_t *im = &ipsec_main; ipsec_sa_t *sa = 0; uword *p; @@ -201,8 +297,9 @@ ipsec_sa_del (u32 id) 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) + return VNET_API_ERROR_SYSCALL_ERROR_2; + + 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 @@ -211,6 +308,8 @@ ipsec_sa_del (u32 id) dpo_reset (&sa->dpo[IPSEC_PROTOCOL_AH]); dpo_reset (&sa->dpo[IPSEC_PROTOCOL_ESP]); } + vnet_crypto_key_del (vm, sa->crypto_key_index); + vnet_crypto_key_del (vm, sa->integ_key_index); pool_put (im->sad, sa); return 0; } @@ -245,6 +344,7 @@ ipsec_is_sa_used (u32 sa_index) int ipsec_set_sa_key (u32 id, const ipsec_key_t * ck, const ipsec_key_t * ik) { + vlib_main_t *vm = vlib_get_main (); ipsec_main_t *im = &ipsec_main; uword *p; u32 sa_index; @@ -262,19 +362,26 @@ ipsec_set_sa_key (u32 id, const ipsec_key_t * ck, const ipsec_key_t * ik) if (ck) { clib_memcpy (&sa->crypto_key, ck, sizeof (sa->crypto_key)); + vnet_crypto_key_modify (vm, sa->crypto_key_index, sa->crypto_calg, + (u8 *) ck->data, ck->len); } /* new integ key */ if (ik) { - clib_memcpy (&sa->integ_key, 0, sizeof (sa->integ_key)); + clib_memcpy (&sa->integ_key, ik, sizeof (sa->integ_key)); + vnet_crypto_key_modify (vm, sa->integ_key_index, sa->integ_calg, + (u8 *) ik->data, ik->len); } if (ck || ik) { err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0); if (err) - return VNET_API_ERROR_SYSCALL_ERROR_1; + { + clib_error_free (err); + return VNET_API_ERROR_SYSCALL_ERROR_1; + } } return 0; @@ -291,6 +398,21 @@ ipsec_get_sa_index_by_sa_id (u32 sa_id) return p[0]; } +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; + })); + /* *INDENT-ON* */ +} + /** * Function definition to get a FIB node from its index */