X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fipsec%2Fesp_encrypt.c;h=e319a9628f47924576c5d0ec55c6dbbfab1275ee;hb=47feb1146ec3b0e1cf2ebd83cd5211e1df261194;hp=4f2d7707395eec8b36d9273a598610eecf0dc862;hpb=2e02ba0ddaa8fecbd4b6397787658bd29fcca749;p=vpp.git diff --git a/src/vnet/ipsec/esp_encrypt.c b/src/vnet/ipsec/esp_encrypt.c index 4f2d7707395..e319a9628f4 100644 --- a/src/vnet/ipsec/esp_encrypt.c +++ b/src/vnet/ipsec/esp_encrypt.c @@ -20,11 +20,11 @@ #include #include +#include + #include #include -ipsec_proto_main_t ipsec_proto_main; - #define foreach_esp_encrypt_next \ _(DROP, "error-drop") \ _(IP4_LOOKUP, "ip4-lookup") \ @@ -39,12 +39,12 @@ typedef enum ESP_ENCRYPT_N_NEXT, } esp_encrypt_next_t; -#define foreach_esp_encrypt_error \ - _(RX_PKTS, "ESP pkts received") \ - _(NO_BUFFER, "No buffer (packet dropped)") \ - _(DECRYPTION_FAILED, "ESP encryption failed") \ - _(SEQ_CYCLED, "sequence number cycled") - +#define foreach_esp_encrypt_error \ + _(RX_PKTS, "ESP pkts received") \ + _(SEQ_CYCLED, "sequence number cycled (packet dropped)") \ + _(CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)") \ + _(CHAINED_BUFFER, "chained buffers (packet dropped)") \ + _(NO_TRAILER_SPACE, "no trailer space (packet dropped)") typedef enum { @@ -62,6 +62,7 @@ static char *esp_encrypt_error_strings[] = { typedef struct { + u32 sa_index; u32 spi; u32 seq; u8 udp_encap; @@ -77,363 +78,442 @@ format_esp_encrypt_trace (u8 * s, va_list * args) CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); esp_encrypt_trace_t *t = va_arg (*args, esp_encrypt_trace_t *); - s = format (s, "esp: spi %u seq %u crypto %U integrity %U%s", - t->spi, t->seq, + s = format (s, "esp: sa-index %d spi %u seq %u crypto %U integrity %U%s", + t->sa_index, t->spi, t->seq, format_ipsec_crypto_alg, t->crypto_alg, format_ipsec_integ_alg, t->integ_alg, t->udp_encap ? " udp-encap-enabled" : ""); return s; } -always_inline void -esp_encrypt_cbc (vlib_main_t * vm, ipsec_crypto_alg_t alg, - u8 * in, u8 * out, size_t in_len, u8 * key, u8 * iv) +/* pad packet in input buffer */ +static_always_inline u8 * +esp_add_footer_and_icv (vlib_buffer_t * b, u8 block_size, u8 icv_sz) { - ipsec_proto_main_t *em = &ipsec_proto_main; - u32 thread_index = vm->thread_index; -#if OPENSSL_VERSION_NUMBER >= 0x10100000L - EVP_CIPHER_CTX *ctx = em->per_thread_data[thread_index].encrypt_ctx; + static const u8 pad_data[ESP_MAX_BLOCK_SIZE] = { + 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, + 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x00, 0x00, + }; + + u16 min_length = b->current_length + sizeof (esp_footer_t); + u16 new_length = round_pow2 (min_length, block_size); + u8 pad_bytes = new_length - min_length; + esp_footer_t *f = (esp_footer_t *) (vlib_buffer_get_current (b) + + new_length - sizeof (esp_footer_t)); + + if (pad_bytes) + clib_memcpy_fast ((u8 *) f - pad_bytes, pad_data, ESP_MAX_BLOCK_SIZE); + + f->pad_length = pad_bytes; + b->current_length = new_length + icv_sz; + return &f->next_header; +} + +static_always_inline void +esp_update_ip4_hdr (ip4_header_t * ip4, u16 len, int is_transport, int is_udp) +{ + ip_csum_t sum = ip4->checksum; + u16 old_len = 0; + + if (is_transport) + { + u8 prot = is_udp ? IP_PROTOCOL_UDP : IP_PROTOCOL_IPSEC_ESP; + old_len = ip4->length; + sum = ip_csum_update (sum, ip4->protocol, prot, ip4_header_t, protocol); + ip4->protocol = prot; + } + + ip4->length = len = clib_net_to_host_u16 (len); + sum = ip_csum_update (ip4->checksum, old_len, len, ip4_header_t, length); + ip4->checksum = ip_csum_fold (sum); +} + +static_always_inline void +esp_fill_udp_hdr (ipsec_sa_t * sa, udp_header_t * udp, u16 len) +{ + clib_memcpy_fast (udp, &sa->udp_hdr, sizeof (udp_header_t)); + udp->length = clib_net_to_host_u16 (len); +} + +static_always_inline u8 +ext_hdr_is_pre_esp (u8 nexthdr) +{ +#ifdef CLIB_HAVE_VEC128 + static const u8x16 ext_hdr_types = { + IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS, + IP_PROTOCOL_IPV6_ROUTE, + IP_PROTOCOL_IPV6_FRAGMENTATION, + }; + + return !u8x16_is_all_zero (ext_hdr_types == u8x16_splat (nexthdr)); #else - EVP_CIPHER_CTX *ctx = &(em->per_thread_data[thread_index].encrypt_ctx); + return ((nexthdr ^ IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) | + (nexthdr ^ IP_PROTOCOL_IPV6_ROUTE) | + (nexthdr ^ IP_PROTOCOL_IPV6_FRAGMENTATION) != 0); #endif - const EVP_CIPHER *cipher = NULL; - int out_len; +} - ASSERT (alg < IPSEC_CRYPTO_N_ALG); +static_always_inline u8 +esp_get_ip6_hdr_len (ip6_header_t * ip6) +{ + /* this code assumes that HbH, route and frag headers will be before + others, if that is not the case, they will end up encrypted */ - if (PREDICT_FALSE - (em->ipsec_proto_main_crypto_algs[alg].type == IPSEC_CRYPTO_ALG_NONE)) - return; + u8 len = sizeof (ip6_header_t); + ip6_ext_header_t *p; + + /* if next packet doesn't have ext header */ + if (ext_hdr_is_pre_esp (ip6->protocol) == 0) + return len; + + p = (void *) (ip6 + 1); + len += ip6_ext_header_len (p); - if (PREDICT_FALSE - (alg != em->per_thread_data[thread_index].last_encrypt_alg)) + while (ext_hdr_is_pre_esp (p->next_hdr)) { - cipher = em->ipsec_proto_main_crypto_algs[alg].type; - em->per_thread_data[thread_index].last_encrypt_alg = alg; + len += ip6_ext_header_len (p); + p = ip6_ext_next_header (p); } - EVP_EncryptInit_ex (ctx, cipher, NULL, key, iv); + return len; +} + +static_always_inline int +esp_trailer_icv_overflow (vlib_node_runtime_t * node, vlib_buffer_t * b, + u16 * next, u16 buffer_data_size) +{ + if (b->current_data + b->current_length <= buffer_data_size) + return 0; - EVP_EncryptUpdate (ctx, out, &out_len, in, in_len); - EVP_EncryptFinal_ex (ctx, out + out_len, &out_len); + b->current_length -= buffer_data_size - b->current_data; + b->error = node->errors[ESP_ENCRYPT_ERROR_NO_TRAILER_SPACE]; + next[0] = ESP_ENCRYPT_NEXT_DROP; + return 1; } -always_inline uword -esp_encrypt_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * from_frame, - int is_ip6) +static_always_inline void +esp_process_ops (vlib_main_t * vm, vlib_node_runtime_t * node, + vnet_crypto_op_t * ops, vlib_buffer_t * b[], u16 * nexts) { - u32 n_left_from, *from, *to_next = 0, next_index; - from = vlib_frame_vector_args (from_frame); - n_left_from = from_frame->n_vectors; - ipsec_main_t *im = &ipsec_main; - ipsec_proto_main_t *em = &ipsec_proto_main; - u32 *recycle = 0; - u32 thread_index = vm->thread_index; + u32 n_fail, n_ops = vec_len (ops); + vnet_crypto_op_t *op = ops; - ipsec_alloc_empty_buffers (vm, im); + if (n_ops == 0) + return; - u32 *empty_buffers = im->empty_buffers[thread_index]; + n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops); - if (PREDICT_FALSE (vec_len (empty_buffers) < n_left_from)) + while (n_fail) { - vlib_node_increment_counter (vm, node->node_index, - ESP_ENCRYPT_ERROR_NO_BUFFER, n_left_from); - clib_warning ("not enough empty buffers. discarding frame"); - goto free_buffers_and_exit; + ASSERT (op - ops < n_ops); + + if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED) + { + u32 bi = op->user_data; + b[bi]->error = node->errors[ESP_ENCRYPT_ERROR_CRYPTO_ENGINE_ERROR]; + nexts[bi] = ESP_ENCRYPT_NEXT_DROP; + n_fail--; + } + op++; } +} + +always_inline uword +esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame, int is_ip6, int is_tun) +{ + ipsec_main_t *im = &ipsec_main; + ipsec_per_thread_data_t *ptd = vec_elt_at_index (im->ptd, vm->thread_index); + u32 *from = vlib_frame_vector_args (frame); + u32 n_left = frame->n_vectors; + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; + u16 nexts[VLIB_FRAME_SIZE], *next = nexts; + u32 thread_index = vm->thread_index; + u16 buffer_data_size = vlib_buffer_get_default_data_size (vm); + u32 current_sa_index = ~0, current_sa_packets = 0; + u32 current_sa_bytes = 0, spi = 0; + u8 block_sz = 0, iv_sz = 0, icv_sz = 0; + ipsec_sa_t *sa0 = 0; - next_index = node->cached_next_index; + vlib_get_buffers (vm, from, b, n_left); + vec_reset_length (ptd->crypto_ops); + vec_reset_length (ptd->integ_ops); - while (n_left_from > 0) + while (n_left > 0) { - u32 n_left_to_next; + u32 sa_index0 = vnet_buffer (b[0])->ipsec.sad_index; + dpo_id_t *dpo; + esp_header_t *esp; + u8 *payload, *next_hdr_ptr; + u16 payload_len; + u32 hdr_len; + + if (n_left > 2) + { + u8 *p; + vlib_prefetch_buffer_header (b[2], LOAD); + p = vlib_buffer_get_current (b[1]); + CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD); + p -= CLIB_CACHE_LINE_BYTES; + CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD); + } - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + if (is_tun) + { + /* we are on a ipsec tunnel's feature arc */ + u32 next0; + sa_index0 = *(u32 *) vnet_feature_next_with_data (&next0, b[0], + sizeof + (sa_index0)); + next[0] = next0; + } + else + sa_index0 = vnet_buffer (b[0])->ipsec.sad_index; - while (n_left_from > 0 && n_left_to_next > 0) + if (sa_index0 != current_sa_index) { - u32 i_bi0, o_bi0, next0; - vlib_buffer_t *i_b0, *o_b0 = 0; - u32 sa_index0; - ipsec_sa_t *sa0; - ip4_and_esp_header_t *oh0 = 0; - ip6_and_esp_header_t *ih6_0, *oh6_0 = 0; - ip4_and_udp_and_esp_header_t *iuh0, *ouh0 = 0; - uword last_empty_buffer; - esp_header_t *o_esp0; - esp_footer_t *f0; - u8 ip_udp_hdr_size; - u8 next_hdr_type; - u32 ip_proto = 0; - u8 transport_mode = 0; - - i_bi0 = from[0]; - from += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - next0 = ESP_ENCRYPT_NEXT_DROP; - - i_b0 = vlib_get_buffer (vm, i_bi0); - sa_index0 = vnet_buffer (i_b0)->ipsec.sad_index; sa0 = pool_elt_at_index (im->sad, sa_index0); + current_sa_index = sa_index0; + vlib_increment_combined_counter (&ipsec_sa_counters, thread_index, + sa_index0, current_sa_packets, + current_sa_bytes); + current_sa_packets = current_sa_bytes = 0; + spi = clib_net_to_host_u32 (sa0->spi); + block_sz = sa0->crypto_block_size; + icv_sz = sa0->integ_icv_size; + iv_sz = sa0->crypto_iv_size; + } - if (PREDICT_FALSE (esp_seq_advance (sa0))) - { - clib_warning ("sequence number counter has cycled SPI %u", - sa0->spi); - vlib_node_increment_counter (vm, node->node_index, - ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1); - //TODO: rekey SA - o_bi0 = i_bi0; - to_next[0] = o_bi0; - to_next += 1; - goto trace; - } + if (vlib_buffer_chain_linearize (vm, b[0]) != 1) + { + b[0]->error = node->errors[ESP_ENCRYPT_ERROR_CHAINED_BUFFER]; + next[0] = ESP_ENCRYPT_NEXT_DROP; + goto trace; + } - sa0->total_data_size += i_b0->current_length; - - /* grab free buffer */ - last_empty_buffer = vec_len (empty_buffers) - 1; - o_bi0 = empty_buffers[last_empty_buffer]; - o_b0 = vlib_get_buffer (vm, o_bi0); - o_b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID; - o_b0->current_data = sizeof (ethernet_header_t); - iuh0 = vlib_buffer_get_current (i_b0); - vlib_prefetch_buffer_with_index (vm, - empty_buffers[last_empty_buffer - - 1], STORE); - _vec_len (empty_buffers) = last_empty_buffer; - to_next[0] = o_bi0; - to_next += 1; - - /* add old buffer to the recycle list */ - vec_add1 (recycle, i_bi0); + if (PREDICT_FALSE (esp_seq_advance (sa0))) + { + b[0]->error = node->errors[ESP_ENCRYPT_ERROR_SEQ_CYCLED]; + next[0] = ESP_ENCRYPT_NEXT_DROP; + goto trace; + } - if (is_ip6) - { - ih6_0 = vlib_buffer_get_current (i_b0); - next_hdr_type = IP_PROTOCOL_IPV6; - oh6_0 = vlib_buffer_get_current (o_b0); - - oh6_0->ip6.ip_version_traffic_class_and_flow_label = - ih6_0->ip6.ip_version_traffic_class_and_flow_label; - oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP; - ip_udp_hdr_size = sizeof (ip6_header_t); - o_esp0 = vlib_buffer_get_current (o_b0) + ip_udp_hdr_size; - oh6_0->ip6.hop_limit = 254; - oh6_0->ip6.src_address.as_u64[0] = - ih6_0->ip6.src_address.as_u64[0]; - oh6_0->ip6.src_address.as_u64[1] = - ih6_0->ip6.src_address.as_u64[1]; - oh6_0->ip6.dst_address.as_u64[0] = - ih6_0->ip6.dst_address.as_u64[0]; - oh6_0->ip6.dst_address.as_u64[1] = - ih6_0->ip6.dst_address.as_u64[1]; - o_esp0->spi = clib_net_to_host_u32 (sa0->spi); - o_esp0->seq = clib_net_to_host_u32 (sa0->seq); - ip_proto = ih6_0->ip6.protocol; - - next0 = ESP_ENCRYPT_NEXT_IP6_LOOKUP; - } - else + /* space for IV */ + hdr_len = iv_sz; + + if (ipsec_sa_is_set_IS_TUNNEL (sa0)) + { + payload = vlib_buffer_get_current (b[0]); + next_hdr_ptr = esp_add_footer_and_icv (b[0], block_sz, icv_sz); + payload_len = b[0]->current_length; + + if (esp_trailer_icv_overflow (node, b[0], next, buffer_data_size)) + goto trace; + + /* ESP header */ + hdr_len += sizeof (*esp); + esp = (esp_header_t *) (payload - hdr_len); + + /* optional UDP header */ + if (ipsec_sa_is_set_UDP_ENCAP (sa0)) { - next_hdr_type = IP_PROTOCOL_IP_IN_IP; - oh0 = vlib_buffer_get_current (o_b0); - ouh0 = vlib_buffer_get_current (o_b0); - - oh0->ip4.ip_version_and_header_length = 0x45; - oh0->ip4.tos = iuh0->ip4.tos; - oh0->ip4.fragment_id = 0; - oh0->ip4.flags_and_fragment_offset = 0; - oh0->ip4.ttl = 254; - if (sa0->udp_encap) - { - ouh0->udp.src_port = - clib_host_to_net_u16 (UDP_DST_PORT_ipsec); - ouh0->udp.dst_port = - clib_host_to_net_u16 (UDP_DST_PORT_ipsec); - ouh0->udp.checksum = 0; - ouh0->ip4.protocol = IP_PROTOCOL_UDP; - ip_udp_hdr_size = - sizeof (udp_header_t) + sizeof (ip4_header_t); - } - else - { - oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP; - ip_udp_hdr_size = sizeof (ip4_header_t); - } - o_esp0 = vlib_buffer_get_current (o_b0) + ip_udp_hdr_size; - oh0->ip4.src_address.as_u32 = iuh0->ip4.src_address.as_u32; - oh0->ip4.dst_address.as_u32 = iuh0->ip4.dst_address.as_u32; - o_esp0->spi = clib_net_to_host_u32 (sa0->spi); - o_esp0->seq = clib_net_to_host_u32 (sa0->seq); - ip_proto = iuh0->ip4.protocol; - - next0 = ESP_ENCRYPT_NEXT_IP4_LOOKUP; + hdr_len += sizeof (udp_header_t); + esp_fill_udp_hdr (sa0, (udp_header_t *) (payload - hdr_len), + payload_len + hdr_len); } - if (PREDICT_TRUE (!is_ip6 && sa0->is_tunnel && !sa0->is_tunnel_ip6)) + /* IP header */ + if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa0)) { - oh0->ip4.src_address.as_u32 = sa0->tunnel_src_addr.ip4.as_u32; - oh0->ip4.dst_address.as_u32 = sa0->tunnel_dst_addr.ip4.as_u32; - - vnet_buffer (o_b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + ip6_header_t *ip6; + u16 len = sizeof (ip6_header_t); + hdr_len += len; + ip6 = (ip6_header_t *) (payload - hdr_len); + clib_memcpy_fast (ip6, &sa0->ip6_hdr, len); + *next_hdr_ptr = (is_ip6 ? + IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP); + len = payload_len + hdr_len - len; + ip6->payload_length = clib_net_to_host_u16 (len); } - else if (is_ip6 && sa0->is_tunnel && sa0->is_tunnel_ip6) + else { - oh6_0->ip6.src_address.as_u64[0] = - sa0->tunnel_src_addr.ip6.as_u64[0]; - oh6_0->ip6.src_address.as_u64[1] = - sa0->tunnel_src_addr.ip6.as_u64[1]; - oh6_0->ip6.dst_address.as_u64[0] = - sa0->tunnel_dst_addr.ip6.as_u64[0]; - oh6_0->ip6.dst_address.as_u64[1] = - sa0->tunnel_dst_addr.ip6.as_u64[1]; - - vnet_buffer (o_b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + ip4_header_t *ip4; + u16 len = sizeof (ip4_header_t); + hdr_len += len; + ip4 = (ip4_header_t *) (payload - hdr_len); + clib_memcpy_fast (ip4, &sa0->ip4_hdr, len); + *next_hdr_ptr = (is_ip6 ? + IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP); + len = payload_len + hdr_len; + esp_update_ip4_hdr (ip4, len, /* is_transport */ 0, 0); } - else + + dpo = sa0->dpo + IPSEC_PROTOCOL_ESP; + if (!is_tun) { - next_hdr_type = ip_proto; - if (vnet_buffer (i_b0)->sw_if_index[VLIB_TX] != ~0) - { - transport_mode = 1; - ethernet_header_t *ieh0, *oeh0; - ieh0 = - (ethernet_header_t *) ((u8 *) - vlib_buffer_get_current (i_b0) - - sizeof (ethernet_header_t)); - oeh0 = (ethernet_header_t *) o_b0->data; - clib_memcpy_fast (oeh0, ieh0, sizeof (ethernet_header_t)); - next0 = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT; - vnet_buffer (o_b0)->sw_if_index[VLIB_TX] = - vnet_buffer (i_b0)->sw_if_index[VLIB_TX]; - } - vlib_buffer_advance (i_b0, ip_udp_hdr_size); + next[0] = dpo->dpoi_next_node; + vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo->dpoi_index; } + } + else /* transport mode */ + { + u8 *l2_hdr, l2_len, *ip_hdr, ip_len; + udp_header_t *udp = 0; + u8 *old_ip_hdr = vlib_buffer_get_current (b[0]); - ASSERT (sa0->crypto_alg < IPSEC_CRYPTO_N_ALG); + ip_len = is_ip6 ? + esp_get_ip6_hdr_len ((ip6_header_t *) old_ip_hdr) : + ip4_header_bytes ((ip4_header_t *) old_ip_hdr); - if (PREDICT_TRUE (sa0->crypto_alg != IPSEC_CRYPTO_ALG_NONE)) - { + vlib_buffer_advance (b[0], ip_len); + payload = vlib_buffer_get_current (b[0]); + next_hdr_ptr = esp_add_footer_and_icv (b[0], block_sz, icv_sz); + payload_len = b[0]->current_length; - const int BLOCK_SIZE = - em->ipsec_proto_main_crypto_algs[sa0->crypto_alg].block_size; - const int IV_SIZE = - em->ipsec_proto_main_crypto_algs[sa0->crypto_alg].iv_size; - int blocks = 1 + (i_b0->current_length + 1) / BLOCK_SIZE; - - /* pad packet in input buffer */ - u8 pad_bytes = BLOCK_SIZE * blocks - 2 - i_b0->current_length; - u8 i; - u8 *padding = - vlib_buffer_get_current (i_b0) + i_b0->current_length; - i_b0->current_length = BLOCK_SIZE * blocks; - for (i = 0; i < pad_bytes; ++i) - { - padding[i] = i + 1; - } - f0 = vlib_buffer_get_current (i_b0) + i_b0->current_length - 2; - f0->pad_length = pad_bytes; - f0->next_header = next_hdr_type; - - o_b0->current_length = ip_udp_hdr_size + sizeof (esp_header_t) + - BLOCK_SIZE * blocks + IV_SIZE; - - vnet_buffer (o_b0)->sw_if_index[VLIB_RX] = - vnet_buffer (i_b0)->sw_if_index[VLIB_RX]; - - u8 iv[em-> - ipsec_proto_main_crypto_algs[sa0->crypto_alg].iv_size]; - RAND_bytes (iv, sizeof (iv)); - - clib_memcpy_fast ((u8 *) vlib_buffer_get_current (o_b0) + - ip_udp_hdr_size + sizeof (esp_header_t), iv, - em->ipsec_proto_main_crypto_algs[sa0-> - crypto_alg].iv_size); - - esp_encrypt_cbc (vm, sa0->crypto_alg, - (u8 *) vlib_buffer_get_current (i_b0), - (u8 *) vlib_buffer_get_current (o_b0) + - ip_udp_hdr_size + sizeof (esp_header_t) + - IV_SIZE, BLOCK_SIZE * blocks, - sa0->crypto_key, iv); + if (esp_trailer_icv_overflow (node, b[0], next, buffer_data_size)) + goto trace; + + /* ESP header */ + hdr_len += sizeof (*esp); + esp = (esp_header_t *) (payload - hdr_len); + + /* optional UDP header */ + if (ipsec_sa_is_set_UDP_ENCAP (sa0)) + { + hdr_len += sizeof (udp_header_t); + udp = (udp_header_t *) (payload - hdr_len); } - o_b0->current_length += hmac_calc (sa0->integ_alg, sa0->integ_key, - sa0->integ_key_len, - (u8 *) o_esp0, - o_b0->current_length - - ip_udp_hdr_size, - vlib_buffer_get_current (o_b0) + - o_b0->current_length, - sa0->use_esn, sa0->seq_hi); + /* IP header */ + hdr_len += ip_len; + ip_hdr = payload - hdr_len; + /* L2 header */ + l2_len = vnet_buffer (b[0])->ip.save_rewrite_length; + hdr_len += l2_len; + l2_hdr = payload - hdr_len; + + /* copy l2 and ip header */ + clib_memcpy_le32 (l2_hdr, old_ip_hdr - l2_len, l2_len); + clib_memcpy_le64 (ip_hdr, old_ip_hdr, ip_len); if (is_ip6) { - oh6_0->ip6.payload_length = - clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, o_b0) - - sizeof (ip6_header_t)); + ip6_header_t *ip6 = (ip6_header_t *) (ip_hdr); + *next_hdr_ptr = ip6->protocol; + ip6->protocol = IP_PROTOCOL_IPSEC_ESP; + ip6->payload_length = payload_len + hdr_len - l2_len - ip_len; } else { - oh0->ip4.length = - clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, o_b0)); - oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4); - if (sa0->udp_encap) + u16 len; + ip4_header_t *ip4 = (ip4_header_t *) (ip_hdr); + *next_hdr_ptr = ip4->protocol; + len = payload_len + hdr_len + l2_len; + if (udp) { - ouh0->udp.length = - clib_host_to_net_u16 (clib_net_to_host_u16 - (oh0->ip4.length) - - ip4_header_bytes (&oh0->ip4)); + esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 1); + esp_fill_udp_hdr (sa0, udp, len - ip_len); } + else + esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 0); } - if (transport_mode) - vlib_buffer_reset (o_b0); + next[0] = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT; + } + + esp->spi = spi; + esp->seq = clib_net_to_host_u32 (sa0->seq); - trace: - if (PREDICT_FALSE (i_b0->flags & VLIB_BUFFER_IS_TRACED)) + if (sa0->crypto_enc_op_id) + { + vnet_crypto_op_t *op; + vec_add2_aligned (ptd->crypto_ops, op, 1, CLIB_CACHE_LINE_BYTES); + vnet_crypto_op_init (op, sa0->crypto_enc_op_id); + op->iv = payload - iv_sz; + op->src = op->dst = payload; + op->key = sa0->crypto_key.data; + op->len = payload_len - icv_sz; + op->flags = VNET_CRYPTO_OP_FLAG_INIT_IV; + op->user_data = b - bufs; + op->salt = sa0->salt; + + if (ipsec_sa_is_set_IS_AEAD (sa0)) { - if (o_b0) - { - o_b0->flags |= VLIB_BUFFER_IS_TRACED; - o_b0->trace_index = i_b0->trace_index; - esp_encrypt_trace_t *tr = - vlib_add_trace (vm, node, o_b0, sizeof (*tr)); - tr->spi = sa0->spi; - tr->seq = sa0->seq - 1; - tr->udp_encap = sa0->udp_encap; - tr->crypto_alg = sa0->crypto_alg; - tr->integ_alg = sa0->integ_alg; - } + /* + * construct the AAD in a scratch space in front + * of the IP header. + */ + op->aad = payload - hdr_len - sizeof (esp_aead_t); + + esp_aad_fill (op, esp, sa0); + + op->tag = payload + op->len; + op->tag_len = 16; } + } - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, o_bi0, - next0); + if (sa0->integ_op_id) + { + vnet_crypto_op_t *op; + vec_add2_aligned (ptd->integ_ops, op, 1, CLIB_CACHE_LINE_BYTES); + vnet_crypto_op_init (op, sa0->integ_op_id); + op->src = payload - iv_sz - sizeof (esp_header_t); + op->digest = payload + payload_len - icv_sz; + op->key = sa0->integ_key.data; + op->key_len = sa0->integ_key.len; + op->digest_len = icv_sz; + op->len = payload_len - icv_sz + iv_sz + sizeof (esp_header_t); + op->user_data = b - bufs; + if (ipsec_sa_is_set_USE_ESN (sa0)) + { + u32 seq_hi = clib_net_to_host_u32 (sa0->seq_hi); + clib_memcpy_fast (op->digest, &seq_hi, sizeof (seq_hi)); + op->len += sizeof (seq_hi); + } } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + + vlib_buffer_advance (b[0], 0LL - hdr_len); + + current_sa_packets += 1; + current_sa_bytes += payload_len; + + trace: + if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED)) + { + esp_encrypt_trace_t *tr = vlib_add_trace (vm, node, b[0], + sizeof (*tr)); + tr->sa_index = sa_index0; + tr->spi = sa0->spi; + tr->seq = sa0->seq - 1; + tr->udp_encap = ipsec_sa_is_set_UDP_ENCAP (sa0); + tr->crypto_alg = sa0->crypto_alg; + tr->integ_alg = sa0->integ_alg; + } + /* next */ + n_left -= 1; + next += 1; + b += 1; } + + vlib_increment_combined_counter (&ipsec_sa_counters, thread_index, + current_sa_index, current_sa_packets, + current_sa_bytes); + esp_process_ops (vm, node, ptd->crypto_ops, bufs, nexts); + esp_process_ops (vm, node, ptd->integ_ops, bufs, nexts); + vlib_node_increment_counter (vm, node->node_index, - ESP_ENCRYPT_ERROR_RX_PKTS, - from_frame->n_vectors); - -free_buffers_and_exit: - if (recycle) - vlib_buffer_free (vm, recycle, vec_len (recycle)); - vec_free (recycle); - return from_frame->n_vectors; + ESP_ENCRYPT_ERROR_RX_PKTS, frame->n_vectors); + + vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); + return frame->n_vectors; } VLIB_NODE_FN (esp4_encrypt_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { - return esp_encrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ ); + return esp_encrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ , 0); } /* *INDENT-OFF* */ @@ -459,7 +539,7 @@ VLIB_NODE_FN (esp6_encrypt_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { - return esp_encrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ ); + return esp_encrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ , 0); } /* *INDENT-OFF* */ @@ -481,6 +561,68 @@ VLIB_REGISTER_NODE (esp6_encrypt_node) = { }; /* *INDENT-ON* */ +VLIB_NODE_FN (esp4_encrypt_tun_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return esp_encrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ , 1); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (esp4_encrypt_tun_node) = { + .name = "esp4-encrypt-tun", + .vector_size = sizeof (u32), + .format_trace = format_esp_encrypt_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(esp_encrypt_error_strings), + .error_strings = esp_encrypt_error_strings, + + .n_next_nodes = 1, + .next_nodes = { + [ESP_ENCRYPT_NEXT_DROP] = "ip4-drop", + }, +}; + +VNET_FEATURE_INIT (esp4_encrypt_tun_feat_node, static) = +{ + .arc_name = "ip4-output", + .node_name = "esp4-encrypt-tun", + .runs_before = VNET_FEATURES ("adj-midchain-tx"), +}; +/* *INDENT-ON* */ + +VLIB_NODE_FN (esp6_encrypt_tun_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return esp_encrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ , 1); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (esp6_encrypt_tun_node) = { + .name = "esp6-encrypt-tun", + .vector_size = sizeof (u32), + .format_trace = format_esp_encrypt_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(esp_encrypt_error_strings), + .error_strings = esp_encrypt_error_strings, + + .n_next_nodes = 1, + .next_nodes = { + [ESP_ENCRYPT_NEXT_DROP] = "ip6-drop", + }, +}; + +VNET_FEATURE_INIT (esp6_encrypt_tun_feat_node, static) = +{ + .arc_name = "ip6-output", + .node_name = "esp6-encrypt-tun", + .runs_before = VNET_FEATURES ("adj-midchain-tx"), +}; +/* *INDENT-ON* */ + /* * fd.io coding-style-patch-verification: ON *