X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fipsec%2Fesp_decrypt.c;h=1ee7ce8fd0aae26fade76348c5f448387edfa300;hb=91f17dc7c4e79343b8fba924e7cea6380a0e6653;hp=5a3ccdcacd94f4acd995897d0c4fda1c36bf608c;hpb=8d7c502002636da1cb7c71a87757f328e7c2c4fd;p=vpp.git diff --git a/src/vnet/ipsec/esp_decrypt.c b/src/vnet/ipsec/esp_decrypt.c index 5a3ccdcacd9..1ee7ce8fd0a 100644 --- a/src/vnet/ipsec/esp_decrypt.c +++ b/src/vnet/ipsec/esp_decrypt.c @@ -21,10 +21,11 @@ #include #include +#include #define foreach_esp_decrypt_next \ _(DROP, "error-drop") \ -_(IP4_INPUT, "ip4-input") \ +_(IP4_INPUT, "ip4-input-no-checksum") \ _(IP6_INPUT, "ip6-input") \ _(IPSEC_GRE_INPUT, "ipsec-gre-input") @@ -81,35 +82,28 @@ format_esp_decrypt_trace (u8 * s, va_list * args) } always_inline void -esp_decrypt_cbc (ipsec_crypto_alg_t alg, +esp_decrypt_cbc (vlib_main_t * vm, ipsec_crypto_alg_t alg, u8 * in, u8 * out, size_t in_len, u8 * key, u8 * iv) { - ipsec_proto_main_t *em = &ipsec_proto_main; - u32 thread_index = vlib_get_thread_index (); -#if OPENSSL_VERSION_NUMBER >= 0x10100000L - EVP_CIPHER_CTX *ctx = em->per_thread_data[thread_index].decrypt_ctx; -#else - EVP_CIPHER_CTX *ctx = &(em->per_thread_data[thread_index].decrypt_ctx); -#endif - const EVP_CIPHER *cipher = NULL; - int out_len; + ipsec_main_t *im = &ipsec_main; + ipsec_main_crypto_alg_t *a; + vnet_crypto_op_t _op, *op = &_op; ASSERT (alg < IPSEC_CRYPTO_N_ALG); - if (PREDICT_FALSE (em->ipsec_proto_main_crypto_algs[alg].type == 0)) - return; + a = &im->crypto_algs[alg]; - if (PREDICT_FALSE - (alg != em->per_thread_data[thread_index].last_decrypt_alg)) - { - cipher = em->ipsec_proto_main_crypto_algs[alg].type; - em->per_thread_data[thread_index].last_decrypt_alg = alg; - } + if (PREDICT_FALSE (a->dec_op_type == VNET_CRYPTO_OP_NONE)) + return; - EVP_DecryptInit_ex (ctx, cipher, NULL, key, iv); + op->op = a->dec_op_type; + op->iv = iv; + op->src = in; + op->dst = out; + op->len = in_len; + op->key = key; - EVP_DecryptUpdate (ctx, out, &out_len, in, in_len); - EVP_DecryptFinal_ex (ctx, out + out_len, &out_len); + vnet_crypto_process_ops (vm, op, 1); } always_inline uword @@ -117,294 +111,250 @@ esp_decrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame, int is_ip6) { - u32 n_left_from, *from, next_index, *to_next; ipsec_main_t *im = &ipsec_main; - ipsec_proto_main_t *em = &ipsec_proto_main; - u32 *recycle = 0; - from = vlib_frame_vector_args (from_frame); - n_left_from = from_frame->n_vectors; - u32 thread_index = vlib_get_thread_index (); - - ipsec_alloc_empty_buffers (vm, im); - - u32 *empty_buffers = im->empty_buffers[thread_index]; - - if (PREDICT_FALSE (vec_len (empty_buffers) < n_left_from)) + u32 *from = vlib_frame_vector_args (from_frame); + u32 n_left_from = from_frame->n_vectors; + u32 new_bufs[VLIB_FRAME_SIZE]; + vlib_buffer_t *i_bufs[VLIB_FRAME_SIZE], **ib = i_bufs; + vlib_buffer_t *o_bufs[VLIB_FRAME_SIZE], **ob = o_bufs; + u16 nexts[VLIB_FRAME_SIZE], *next = nexts; + u32 n_alloc, thread_index = vm->thread_index; + + n_alloc = vlib_buffer_alloc (vm, new_bufs, n_left_from); + if (n_alloc != n_left_from) { vlib_node_increment_counter (vm, node->node_index, - ESP_DECRYPT_ERROR_NO_BUFFER, n_left_from); - goto free_buffers_and_exit; + ESP_DECRYPT_ERROR_NO_BUFFER, + n_left_from - n_alloc); + if (n_alloc == 0) + goto done; + n_left_from = n_alloc; } - next_index = node->cached_next_index; + vlib_get_buffers (vm, from, ib, n_left_from); + vlib_get_buffers (vm, new_bufs, ob, n_left_from); while (n_left_from > 0) { - u32 n_left_to_next; + esp_header_t *esp0; + ipsec_sa_t *sa0; + u32 sa_index0 = ~0; + u32 seq; + ip4_header_t *ih4 = 0, *oh4 = 0; + ip6_header_t *ih6 = 0, *oh6 = 0; + u8 tunnel_mode = 1; + + next[0] = ESP_DECRYPT_NEXT_DROP; + + esp0 = vlib_buffer_get_current (ib[0]); + sa_index0 = vnet_buffer (ib[0])->ipsec.sad_index; + sa0 = pool_elt_at_index (im->sad, sa_index0); + seq = clib_host_to_net_u32 (esp0->seq); + + /* anti-replay check */ + if (sa0->use_anti_replay) + { + int rv = 0; - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + if (PREDICT_TRUE (sa0->use_esn)) + rv = esp_replay_check_esn (sa0, seq); + else + rv = esp_replay_check (sa0, seq); - while (n_left_from > 0 && n_left_to_next > 0) + if (PREDICT_FALSE (rv)) + { + u32 tmp, off = n_alloc - n_left_from; + /* send original packet to drop node */ + tmp = from[off]; + from[off] = new_bufs[off]; + new_bufs[off] = tmp; + ib[0]->error = node->errors[ESP_DECRYPT_ERROR_REPLAY]; + next[0] = ESP_DECRYPT_NEXT_DROP; + goto trace; + } + } + + vlib_increment_combined_counter + (&ipsec_sa_counters, thread_index, sa_index0, + 1, ib[0]->current_length); + + if (PREDICT_TRUE (sa0->integ_alg != IPSEC_INTEG_ALG_NONE)) { - u32 i_bi0, o_bi0 = (u32) ~ 0, next0; - vlib_buffer_t *i_b0; - vlib_buffer_t *o_b0 = 0; - esp_header_t *esp0; - ipsec_sa_t *sa0; - u32 sa_index0 = ~0; - u32 seq; - ip4_header_t *ih4 = 0, *oh4 = 0; - ip6_header_t *ih6 = 0, *oh6 = 0; - u8 tunnel_mode = 1; - - i_bi0 = from[0]; - from += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - next0 = ESP_DECRYPT_NEXT_DROP; - - i_b0 = vlib_get_buffer (vm, i_bi0); - esp0 = vlib_buffer_get_current (i_b0); - - sa_index0 = vnet_buffer (i_b0)->ipsec.sad_index; - sa0 = pool_elt_at_index (im->sad, sa_index0); - - seq = clib_host_to_net_u32 (esp0->seq); - - /* anti-replay check */ - if (sa0->use_anti_replay) + u8 sig[64]; + int icv_size = im->integ_algs[sa0->integ_alg].trunc_size; + clib_memset (sig, 0, sizeof (sig)); + u8 *icv = vlib_buffer_get_current (ib[0]) + ib[0]->current_length - + icv_size; + ib[0]->current_length -= icv_size; + + hmac_calc (vm, sa0->integ_alg, sa0->integ_key.data, + sa0->integ_key.len, (u8 *) esp0, + ib[0]->current_length, sig, sa0->use_esn, sa0->seq_hi); + + if (PREDICT_FALSE (memcmp (icv, sig, icv_size))) { - int rv = 0; + u32 tmp, off = n_alloc - n_left_from; + /* send original packet to drop node */ + tmp = from[off]; + from[off] = new_bufs[off]; + new_bufs[off] = tmp; + ib[0]->error = node->errors[ESP_DECRYPT_ERROR_INTEG_ERROR]; + next[0] = ESP_DECRYPT_NEXT_DROP; + goto trace; + } + } - if (PREDICT_TRUE (sa0->use_esn)) - rv = esp_replay_check_esn (sa0, seq); - else - rv = esp_replay_check (sa0, seq); + if (PREDICT_TRUE (sa0->use_anti_replay)) + { + if (PREDICT_TRUE (sa0->use_esn)) + esp_replay_advance_esn (sa0, seq); + else + esp_replay_advance (sa0, seq); + } + + if ((sa0->crypto_alg >= IPSEC_CRYPTO_ALG_AES_CBC_128 && + sa0->crypto_alg <= IPSEC_CRYPTO_ALG_AES_CBC_256) || + (sa0->crypto_alg >= IPSEC_CRYPTO_ALG_DES_CBC && + sa0->crypto_alg <= IPSEC_CRYPTO_ALG_3DES_CBC)) + { + const int BLOCK_SIZE = im->crypto_algs[sa0->crypto_alg].block_size; + const int IV_SIZE = im->crypto_algs[sa0->crypto_alg].iv_size; + esp_footer_t *f0; + u8 ip_hdr_size = 0; + + int blocks = + (ib[0]->current_length - sizeof (esp_header_t) - + IV_SIZE) / BLOCK_SIZE; + + ob[0]->current_data = sizeof (ethernet_header_t); - if (PREDICT_FALSE (rv)) + /* transport mode */ + if (PREDICT_FALSE (!sa0->is_tunnel && !sa0->is_tunnel_ip6)) + { + tunnel_mode = 0; + + if (is_ip6) { - vlib_node_increment_counter (vm, node->node_index, - ESP_DECRYPT_ERROR_REPLAY, 1); - o_bi0 = i_bi0; - to_next[0] = o_bi0; - to_next += 1; - goto trace; + ip_hdr_size = sizeof (ip6_header_t); + ih6 = (ip6_header_t *) ((u8 *) esp0 - ip_hdr_size); + oh6 = vlib_buffer_get_current (ob[0]); + } + else + { + ip_hdr_size = sizeof (ip4_header_t); + if (sa0->udp_encap) + ih4 = (ip4_header_t *) ((u8 *) esp0 - ip_hdr_size - + sizeof (udp_header_t)); + else + ih4 = (ip4_header_t *) ((u8 *) esp0 - ip_hdr_size); + oh4 = vlib_buffer_get_current (ob[0]); } } - sa0->total_data_size += i_b0->current_length; + esp_decrypt_cbc (vm, sa0->crypto_alg, + esp0->data + IV_SIZE, + (u8 *) vlib_buffer_get_current (ob[0]) + + ip_hdr_size, BLOCK_SIZE * blocks, + sa0->crypto_key.data, esp0->data); + + ob[0]->current_length = (blocks * BLOCK_SIZE) - 2 + ip_hdr_size; + ob[0]->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID; + f0 = (esp_footer_t *) ((u8 *) vlib_buffer_get_current (ob[0]) + + ob[0]->current_length); + ob[0]->current_length -= f0->pad_length; - if (PREDICT_TRUE (sa0->integ_alg != IPSEC_INTEG_ALG_NONE)) + /* tunnel mode */ + if (PREDICT_TRUE (tunnel_mode)) { - u8 sig[64]; - int icv_size = - em->ipsec_proto_main_integ_algs[sa0->integ_alg].trunc_size; - clib_memset (sig, 0, sizeof (sig)); - u8 *icv = - vlib_buffer_get_current (i_b0) + i_b0->current_length - - icv_size; - i_b0->current_length -= icv_size; - - hmac_calc (sa0->integ_alg, sa0->integ_key.data, - sa0->integ_key.len, (u8 *) esp0, - i_b0->current_length, sig, sa0->use_esn, - sa0->seq_hi); - - if (PREDICT_FALSE (memcmp (icv, sig, icv_size))) + if (PREDICT_TRUE (f0->next_header == IP_PROTOCOL_IP_IN_IP)) + { + next[0] = ESP_DECRYPT_NEXT_IP4_INPUT; + oh4 = vlib_buffer_get_current (ob[0]); + } + else if (f0->next_header == IP_PROTOCOL_IPV6) + next[0] = ESP_DECRYPT_NEXT_IP6_INPUT; + else { vlib_node_increment_counter (vm, node->node_index, - ESP_DECRYPT_ERROR_INTEG_ERROR, + ESP_DECRYPT_ERROR_DECRYPTION_FAILED, 1); - o_bi0 = i_bi0; - to_next[0] = o_bi0; - to_next += 1; + ob[0] = 0; goto trace; } } - - if (PREDICT_TRUE (sa0->use_anti_replay)) + /* transport mode */ + else { - if (PREDICT_TRUE (sa0->use_esn)) - esp_replay_advance_esn (sa0, seq); - else - esp_replay_advance (sa0, seq); - } - - /* grab free buffer */ - uword last_empty_buffer = vec_len (empty_buffers) - 1; - o_bi0 = empty_buffers[last_empty_buffer]; - to_next[0] = o_bi0; - to_next += 1; - o_b0 = vlib_get_buffer (vm, o_bi0); - vlib_prefetch_buffer_with_index (vm, - empty_buffers[last_empty_buffer - - 1], STORE); - _vec_len (empty_buffers) = last_empty_buffer; - - /* add old buffer to the recycle list */ - vec_add1 (recycle, i_bi0); - - if ((sa0->crypto_alg >= IPSEC_CRYPTO_ALG_AES_CBC_128 && - sa0->crypto_alg <= IPSEC_CRYPTO_ALG_AES_CBC_256) || - (sa0->crypto_alg >= IPSEC_CRYPTO_ALG_DES_CBC && - sa0->crypto_alg <= IPSEC_CRYPTO_ALG_3DES_CBC)) - { - 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; - esp_footer_t *f0; - u8 ip_hdr_size = 0; - - int blocks = - (i_b0->current_length - sizeof (esp_header_t) - - IV_SIZE) / BLOCK_SIZE; - - o_b0->current_data = sizeof (ethernet_header_t); - - /* transport mode */ - if (PREDICT_FALSE (!sa0->is_tunnel && !sa0->is_tunnel_ip6)) + u32 len = vlib_buffer_length_in_chain (vm, ob[0]); + if (is_ip6) { - tunnel_mode = 0; - - if (is_ip6) - { - ih6 = - (ip6_header_t *) ((u8 *) esp0 - - sizeof (ip6_header_t)); - ip_hdr_size = sizeof (ip6_header_t); - oh6 = vlib_buffer_get_current (o_b0); - } - else - { - if (sa0->udp_encap) - { - ih4 = - (ip4_header_t *) ((u8 *) esp0 - - sizeof (udp_header_t) - - sizeof (ip4_header_t)); - } - else - { - ih4 = - (ip4_header_t *) ((u8 *) esp0 - - sizeof (ip4_header_t)); - } - oh4 = vlib_buffer_get_current (o_b0); - ip_hdr_size = sizeof (ip4_header_t); - } + next[0] = ESP_DECRYPT_NEXT_IP6_INPUT; + oh6->ip_version_traffic_class_and_flow_label = + ih6->ip_version_traffic_class_and_flow_label; + oh6->protocol = f0->next_header; + oh6->hop_limit = ih6->hop_limit; + oh6->src_address.as_u64[0] = ih6->src_address.as_u64[0]; + oh6->src_address.as_u64[1] = ih6->src_address.as_u64[1]; + oh6->dst_address.as_u64[0] = ih6->dst_address.as_u64[0]; + oh6->dst_address.as_u64[1] = ih6->dst_address.as_u64[1]; + len -= sizeof (ip6_header_t); + oh6->payload_length = clib_host_to_net_u16 (len); } - - esp_decrypt_cbc (sa0->crypto_alg, - esp0->data + IV_SIZE, - (u8 *) vlib_buffer_get_current (o_b0) + - ip_hdr_size, BLOCK_SIZE * blocks, - sa0->crypto_key.data, esp0->data); - - o_b0->current_length = (blocks * BLOCK_SIZE) - 2 + ip_hdr_size; - o_b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID; - f0 = - (esp_footer_t *) ((u8 *) vlib_buffer_get_current (o_b0) + - o_b0->current_length); - o_b0->current_length -= f0->pad_length; - - /* tunnel mode */ - if (PREDICT_TRUE (tunnel_mode)) - { - if (PREDICT_TRUE (f0->next_header == IP_PROTOCOL_IP_IN_IP)) - { - next0 = ESP_DECRYPT_NEXT_IP4_INPUT; - oh4 = vlib_buffer_get_current (o_b0); - } - else if (f0->next_header == IP_PROTOCOL_IPV6) - next0 = ESP_DECRYPT_NEXT_IP6_INPUT; - else - { - vlib_node_increment_counter (vm, node->node_index, - ESP_DECRYPT_ERROR_DECRYPTION_FAILED, - 1); - o_b0 = 0; - goto trace; - } - } - /* transport mode */ else { - if (is_ip6) - { - next0 = ESP_DECRYPT_NEXT_IP6_INPUT; - oh6->ip_version_traffic_class_and_flow_label = - ih6->ip_version_traffic_class_and_flow_label; - oh6->protocol = f0->next_header; - oh6->hop_limit = ih6->hop_limit; - oh6->src_address.as_u64[0] = ih6->src_address.as_u64[0]; - oh6->src_address.as_u64[1] = ih6->src_address.as_u64[1]; - oh6->dst_address.as_u64[0] = ih6->dst_address.as_u64[0]; - oh6->dst_address.as_u64[1] = ih6->dst_address.as_u64[1]; - oh6->payload_length = - clib_host_to_net_u16 (vlib_buffer_length_in_chain - (vm, - o_b0) - sizeof (ip6_header_t)); - } - else - { - next0 = ESP_DECRYPT_NEXT_IP4_INPUT; - oh4->ip_version_and_header_length = 0x45; - oh4->tos = ih4->tos; - oh4->fragment_id = 0; - oh4->flags_and_fragment_offset = 0; - oh4->ttl = ih4->ttl; - oh4->protocol = f0->next_header; - oh4->src_address.as_u32 = ih4->src_address.as_u32; - oh4->dst_address.as_u32 = ih4->dst_address.as_u32; - oh4->length = - clib_host_to_net_u16 (vlib_buffer_length_in_chain - (vm, o_b0)); - oh4->checksum = ip4_header_checksum (oh4); - } + next[0] = ESP_DECRYPT_NEXT_IP4_INPUT; + oh4->ip_version_and_header_length = 0x45; + oh4->tos = ih4->tos; + oh4->fragment_id = 0; + oh4->flags_and_fragment_offset = 0; + oh4->ttl = ih4->ttl; + oh4->protocol = f0->next_header; + oh4->src_address.as_u32 = ih4->src_address.as_u32; + oh4->dst_address.as_u32 = ih4->dst_address.as_u32; + oh4->length = clib_host_to_net_u16 (len); + oh4->checksum = ip4_header_checksum (oh4); } + } - /* for IPSec-GRE tunnel next node is ipsec-gre-input */ - if (PREDICT_FALSE - ((vnet_buffer (i_b0)->ipsec.flags) & - IPSEC_FLAG_IPSEC_GRE_TUNNEL)) - next0 = ESP_DECRYPT_NEXT_IPSEC_GRE_INPUT; + /* for IPSec-GRE tunnel next node is ipsec-gre-input */ + if (PREDICT_FALSE + ((vnet_buffer (ib[0])->ipsec.flags) & + IPSEC_FLAG_IPSEC_GRE_TUNNEL)) + next[0] = ESP_DECRYPT_NEXT_IPSEC_GRE_INPUT; - vnet_buffer (o_b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - vnet_buffer (o_b0)->sw_if_index[VLIB_RX] = - vnet_buffer (i_b0)->sw_if_index[VLIB_RX]; - } + vnet_buffer (ob[0])->sw_if_index[VLIB_TX] = (u32) ~ 0; + vnet_buffer (ob[0])->sw_if_index[VLIB_RX] = + vnet_buffer (ib[0])->sw_if_index[VLIB_RX]; + } - trace: - if (PREDICT_FALSE (i_b0->flags & VLIB_BUFFER_IS_TRACED)) + trace: + if (PREDICT_FALSE (ib[0]->flags & VLIB_BUFFER_IS_TRACED)) + { + if (ob[0]) { - if (o_b0) - { - o_b0->flags |= VLIB_BUFFER_IS_TRACED; - o_b0->trace_index = i_b0->trace_index; - esp_decrypt_trace_t *tr = - vlib_add_trace (vm, node, o_b0, sizeof (*tr)); - tr->crypto_alg = sa0->crypto_alg; - tr->integ_alg = sa0->integ_alg; - } + ob[0]->flags |= VLIB_BUFFER_IS_TRACED; + ob[0]->trace_index = ib[0]->trace_index; + esp_decrypt_trace_t *tr = + vlib_add_trace (vm, node, ob[0], sizeof (*tr)); + tr->crypto_alg = sa0->crypto_alg; + tr->integ_alg = sa0->integ_alg; } - - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, - n_left_to_next, o_bi0, next0); } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + + /* next */ + n_left_from -= 1; + ib += 1; + ob += 1; + next += 1; } - vlib_node_increment_counter (vm, node->node_index, - ESP_DECRYPT_ERROR_RX_PKTS, - from_frame->n_vectors); + vlib_node_increment_counter (vm, node->node_index, + ESP_DECRYPT_ERROR_RX_PKTS, n_alloc); -free_buffers_and_exit: - if (recycle) - vlib_buffer_free (vm, recycle, vec_len (recycle)); - vec_free (recycle); - return from_frame->n_vectors; + vlib_buffer_enqueue_to_next (vm, node, new_bufs, nexts, n_alloc); +done: + vlib_buffer_free (vm, from, from_frame->n_vectors); + return n_alloc; } VLIB_NODE_FN (esp4_decrypt_node) (vlib_main_t * vm,