diff options
Diffstat (limited to 'src/vnet/session-apps/tls.c')
| -rw-r--r-- | src/vnet/session-apps/tls.c | 1161 |
1 files changed, 1161 insertions, 0 deletions
diff --git a/src/vnet/session-apps/tls.c b/src/vnet/session-apps/tls.c new file mode 100644 index 00000000000..a747990d200 --- /dev/null +++ b/src/vnet/session-apps/tls.c @@ -0,0 +1,1161 @@ +/* + * Copyright (c) 2018 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <vnet/session/application_interface.h> +#include <vppinfra/lock.h> +#include <mbedtls/ssl.h> +#include <mbedtls/certs.h> +#include <mbedtls/entropy.h> +#include <mbedtls/ctr_drbg.h> +#include <mbedtls/timing.h> +#include <mbedtls/debug.h> + +#define TLS_DEBUG (0) +#define TLS_DEBUG_LEVEL_CLIENT (0) +#define TLS_DEBUG_LEVEL_SERVER (0) +#define TLS_CHUNK_SIZE (1 << 14) +#define TLS_USE_OUR_MEM_FUNCS (0) + +#if TLS_DEBUG +#define TLS_DBG(_lvl, _fmt, _args...) \ + if (_lvl <= TLS_DEBUG) \ + clib_warning (_fmt, ##_args) +#else +#define TLS_DBG(_fmt, _args...) +#endif + +#if TLS_USE_OUR_MEM_FUNCS +#include <mbedtls/platform.h> + +void * +mbedtls_calloc_fn (size_t n, size_t size) +{ + void *ptr; + ptr = clib_mem_alloc (n * size); + memset (ptr, 0, sizeof (*ptr)); + return ptr; +} + +void +mbedtls_free_fn (void *ptr) +{ + if (ptr) + clib_mem_free (ptr); +} +#endif + +/* *INDENT-OFF* */ +typedef CLIB_PACKED (struct tls_cxt_id_ +{ + u32 parent_app_index; + session_handle_t app_session_handle; + session_handle_t tls_session_handle; + u32 listener_ctx_index; + u8 tcp_is_ip4; +}) tls_ctx_id_t; +/* *INDENT-ON* */ + +typedef struct tls_ctx_ +{ + union + { + transport_connection_t connection; + tls_ctx_id_t c_tls_ctx_id; + }; +#define parent_app_index c_tls_ctx_id.parent_app_index +#define app_session_handle c_tls_ctx_id.app_session_handle +#define tls_session_handle c_tls_ctx_id.tls_session_handle +#define listener_ctx_index c_tls_ctx_id.listener_ctx_index +#define tcp_is_ip4 c_tls_ctx_id.tcp_is_ip4 + + /* Temporary storage for session open opaque. Overwritten once + * underlying tcp connection is established */ +#define parent_app_api_context c_s_index + + u8 is_passive_close; + mbedtls_ssl_context ssl; + mbedtls_ssl_config conf; + mbedtls_x509_crt srvcert; + mbedtls_pk_context pkey; +} tls_ctx_t; + +typedef struct tls_main_ +{ + u32 app_index; + tls_ctx_t **ctx_pool; + mbedtls_ctr_drbg_context *ctr_drbgs; + mbedtls_entropy_context *entropy_pools; + tls_ctx_t *listener_ctx_pool; + tls_ctx_t *half_open_ctx_pool; + clib_rwlock_t half_open_rwlock; + mbedtls_x509_crt cacert; +} tls_main_t; + +static tls_main_t tls_main; + +void tls_disconnect (u32 ctx_index, u32 thread_index); + +static inline int +tls_add_vpp_q_evt (svm_fifo_t * f, u8 evt_type) +{ + session_fifo_event_t evt; + svm_queue_t *q; + + if (svm_fifo_set_event (f)) + { + evt.fifo = f; + evt.event_type = evt_type; + + q = session_manager_get_vpp_event_queue (f->master_thread_index); + if (PREDICT_TRUE (q->cursize < q->maxsize)) + { + svm_queue_add (q, (u8 *) & evt, 0 /* do wait for mutex */ ); + } + else + { + clib_warning ("vpp's evt q full"); + return -1; + } + } + return 0; +} + +static inline int +tls_add_app_q_evt (application_t * app, stream_session_t * app_session) +{ + session_fifo_event_t evt; + svm_queue_t *q; + + if (PREDICT_FALSE (app_session->session_state == SESSION_STATE_CLOSED)) + { + /* Session is closed so app will never clean up. Flush rx fifo */ + u32 to_dequeue = svm_fifo_max_dequeue (app_session->server_rx_fifo); + if (to_dequeue) + svm_fifo_dequeue_drop (app_session->server_rx_fifo, to_dequeue); + return 0; + } + + if (app->cb_fns.builtin_app_rx_callback) + return app->cb_fns.builtin_app_rx_callback (app_session); + + if (svm_fifo_set_event (app_session->server_rx_fifo)) + { + evt.fifo = app_session->server_rx_fifo; + evt.event_type = FIFO_EVENT_APP_RX; + q = app->event_queue; + + if (PREDICT_TRUE (q->cursize < q->maxsize)) + { + svm_queue_add (q, (u8 *) & evt, 0 /* do wait for mutex */ ); + } + else + { + clib_warning ("app evt q full"); + return -1; + } + } + return 0; +} + +u32 +tls_ctx_alloc (void) +{ + u8 thread_index = vlib_get_thread_index (); + tls_main_t *tm = &tls_main; + tls_ctx_t *ctx; + + pool_get (tm->ctx_pool[thread_index], ctx); + memset (ctx, 0, sizeof (*ctx)); + ctx->c_thread_index = thread_index; + return ctx - tm->ctx_pool[thread_index]; +} + +void +tls_ctx_free (tls_ctx_t * ctx) +{ + pool_put (tls_main.ctx_pool[vlib_get_thread_index ()], ctx); +} + +tls_ctx_t * +tls_ctx_get (u32 ctx_index) +{ + return pool_elt_at_index (tls_main.ctx_pool[vlib_get_thread_index ()], + ctx_index); +} + +tls_ctx_t * +tls_ctx_get_w_thread (u32 ctx_index, u8 thread_index) +{ + return pool_elt_at_index (tls_main.ctx_pool[thread_index], ctx_index); +} + +u32 +tls_ctx_index (tls_ctx_t * ctx) +{ + return (ctx - tls_main.ctx_pool[vlib_get_thread_index ()]); +} + +u32 +tls_listener_ctx_alloc (void) +{ + tls_main_t *tm = &tls_main; + tls_ctx_t *ctx; + + pool_get (tm->listener_ctx_pool, ctx); + memset (ctx, 0, sizeof (*ctx)); + return ctx - tm->listener_ctx_pool; +} + +void +tls_ctx_listener_free (tls_ctx_t * ctx) +{ + pool_put (tls_main.half_open_ctx_pool, ctx); +} + +tls_ctx_t * +tls_listener_ctx_get (u32 ctx_index) +{ + return pool_elt_at_index (tls_main.listener_ctx_pool, ctx_index); +} + +u32 +tls_listener_ctx_index (tls_ctx_t * ctx) +{ + return (ctx - tls_main.listener_ctx_pool); +} + +u32 +tls_ctx_half_open_alloc (void) +{ + tls_main_t *tm = &tls_main; + u8 will_expand = 0; + tls_ctx_t *ctx; + u32 ctx_index; + + pool_get_aligned_will_expand (tm->half_open_ctx_pool, will_expand, 0); + if (PREDICT_FALSE (will_expand && vlib_num_workers ())) + { + clib_rwlock_writer_lock (&tm->half_open_rwlock); + pool_get (tm->half_open_ctx_pool, ctx); + memset (ctx, 0, sizeof (*ctx)); + ctx_index = ctx - tm->half_open_ctx_pool; + clib_rwlock_writer_unlock (&tm->half_open_rwlock); + } + else + { + pool_get (tm->half_open_ctx_pool, ctx); + memset (ctx, 0, sizeof (*ctx)); + ctx_index = ctx - tm->half_open_ctx_pool; + } + return ctx_index; +} + +void +tls_ctx_half_open_free (u32 ho_index) +{ + tls_main_t *tm = &tls_main; + clib_rwlock_writer_lock (&tm->half_open_rwlock); + pool_put_index (tls_main.half_open_ctx_pool, ho_index); + clib_rwlock_writer_unlock (&tm->half_open_rwlock); +} + +tls_ctx_t * +tls_ctx_half_open_get (u32 ctx_index) +{ + tls_main_t *tm = &tls_main; + clib_rwlock_reader_lock (&tm->half_open_rwlock); + return pool_elt_at_index (tm->half_open_ctx_pool, ctx_index); +} + +void +tls_ctx_half_open_reader_unlock () +{ + clib_rwlock_reader_unlock (&tls_main.half_open_rwlock); +} + +u32 +tls_ctx_half_open_index (tls_ctx_t * ctx) +{ + return (ctx - tls_main.half_open_ctx_pool); +} + +static int +tls_init_ctr_drbgs_and_entropy (u32 num_threads) +{ + tls_main_t *tm = &tls_main; + int i; + + vec_validate (tm->ctr_drbgs, num_threads - 1); + vec_validate (tm->entropy_pools, num_threads - 1); + for (i = 0; i < num_threads; i++) + tls_main.ctr_drbgs[i].f_entropy = 0; + + return 0; +} + +static int +tls_init_ctr_seed_drbgs (void) +{ + u32 thread_index = vlib_get_thread_index (); + tls_main_t *tm = &tls_main; + u8 *pers; + int rv; + pers = format (0, "vpp thread %u", thread_index); + + mbedtls_entropy_init (&tm->entropy_pools[thread_index]); + mbedtls_ctr_drbg_init (&tls_main.ctr_drbgs[thread_index]); + if ((rv = mbedtls_ctr_drbg_seed (&tm->ctr_drbgs[thread_index], + mbedtls_entropy_func, + &tm->entropy_pools[thread_index], + (const unsigned char *) pers, + vec_len (pers))) != 0) + { + vec_free (pers); + TLS_DBG (1, " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", rv); + return -1; + } + vec_free (pers); + return 0; +} + +mbedtls_ctr_drbg_context * +tls_get_ctr_drbg () +{ + u8 thread_index = vlib_get_thread_index (); + if (PREDICT_FALSE (!tls_main.ctr_drbgs[thread_index].f_entropy)) + tls_init_ctr_seed_drbgs (); + return &tls_main.ctr_drbgs[thread_index]; +} + +static int +tls_net_send (void *ctx_indexp, const unsigned char *buf, size_t len) +{ + stream_session_t *tls_session; + uword ctx_index; + tls_ctx_t *ctx; + int rv; + + ctx_index = pointer_to_uword (ctx_indexp); + ctx = tls_ctx_get (ctx_index); + tls_session = session_get_from_handle (ctx->tls_session_handle); + rv = svm_fifo_enqueue_nowait (tls_session->server_tx_fifo, len, buf); + if (rv < 0) + return MBEDTLS_ERR_SSL_WANT_WRITE; + tls_add_vpp_q_evt (tls_session->server_tx_fifo, FIFO_EVENT_APP_TX); + return rv; +} + +static int +tls_net_recv (void *ctx_indexp, unsigned char *buf, size_t len) +{ + stream_session_t *tls_session; + uword ctx_index; + tls_ctx_t *ctx; + int rv; + + ctx_index = pointer_to_uword (ctx_indexp); + ctx = tls_ctx_get (ctx_index); + tls_session = session_get_from_handle (ctx->tls_session_handle); + rv = svm_fifo_dequeue_nowait (tls_session->server_rx_fifo, len, buf); + return (rv < 0) ? 0 : rv; +} + +static void +mbedtls_debug (void *ctx, int level, const char *file, int line, + const char *str) +{ + ((void) level); + fprintf ((FILE *) ctx, "%s:%04d: %s", file, line, str); + fflush ((FILE *) ctx); +} + +static int +tls_ctx_init_client (tls_ctx_t * ctx) +{ + tls_main_t *tm = &tls_main; + void *ctx_ptr; + int rv; + + /* + * 1. Setup SSL + */ + mbedtls_ssl_init (&ctx->ssl); + mbedtls_ssl_config_init (&ctx->conf); + if ((rv = mbedtls_ssl_config_defaults (&ctx->conf, MBEDTLS_SSL_IS_CLIENT, + MBEDTLS_SSL_TRANSPORT_STREAM, + MBEDTLS_SSL_PRESET_DEFAULT)) != 0) + { + TLS_DBG (1, "failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", + rv); + return -1; + } + + mbedtls_ssl_conf_authmode (&ctx->conf, MBEDTLS_SSL_VERIFY_OPTIONAL); + mbedtls_ssl_conf_ca_chain (&ctx->conf, &tm->cacert, NULL); + mbedtls_ssl_conf_rng (&ctx->conf, mbedtls_ctr_drbg_random, + tls_get_ctr_drbg ()); + mbedtls_ssl_conf_dbg (&ctx->conf, mbedtls_debug, stdout); + + if ((rv = mbedtls_ssl_setup (&ctx->ssl, &ctx->conf)) != 0) + { + TLS_DBG (1, "failed\n ! mbedtls_ssl_setup returned %d\n", rv); + return -1; + } + + if ((rv = mbedtls_ssl_set_hostname (&ctx->ssl, "SERVER NAME")) != 0) + { + TLS_DBG (1, "failed\n ! mbedtls_ssl_set_hostname returned %d\n", rv); + return -1; + } + + ctx_ptr = uword_to_pointer (tls_ctx_index (ctx), void *); + mbedtls_ssl_set_bio (&ctx->ssl, ctx_ptr, tls_net_send, tls_net_recv, NULL); + + mbedtls_debug_set_threshold (TLS_DEBUG_LEVEL_CLIENT); + + /* + * 2. Do the first 2 steps in the handshake. + */ + TLS_DBG (1, "Initiating handshake for [%u]%u", ctx->c_thread_index, + tls_ctx_index (ctx)); + while (ctx->ssl.state != MBEDTLS_SSL_HANDSHAKE_OVER) + { + rv = mbedtls_ssl_handshake_step (&ctx->ssl); + if (rv != 0) + break; + } + TLS_DBG (2, "tls state for [%u]%u is %u", ctx->c_thread_index, + tls_ctx_index (ctx), ctx->ssl.state); + return 0; +} + +static int +tls_ctx_init_server (tls_ctx_t * ctx) +{ + application_t *app; + void *ctx_ptr; + int rv; + + mbedtls_ssl_init (&ctx->ssl); + mbedtls_ssl_config_init (&ctx->conf); + mbedtls_x509_crt_init (&ctx->srvcert); + mbedtls_pk_init (&ctx->pkey); + + /* + * 1. Cert + */ + app = application_get (ctx->parent_app_index); + if (!app->tls_cert || !app->tls_key) + { + TLS_DBG (1, " failed\n ! tls cert and/or key not configured %d", + ctx->parent_app_index); + return -1; + } + + rv = mbedtls_x509_crt_parse (&ctx->srvcert, + (const unsigned char *) app->tls_cert, + mbedtls_test_srv_crt_len); + if (rv != 0) + { + TLS_DBG (1, " failed\n ! mbedtls_x509_crt_parse returned %d", rv); + goto exit; + } + + /* TODO clone CA */ + rv = mbedtls_x509_crt_parse (&ctx->srvcert, + (const unsigned char *) mbedtls_test_cas_pem, + mbedtls_test_cas_pem_len); + if (rv != 0) + { + TLS_DBG (1, " failed\n ! mbedtls_x509_crt_parse returned %d", rv); + goto exit; + } + + rv = mbedtls_pk_parse_key (&ctx->pkey, + (const unsigned char *) app->tls_key, + mbedtls_test_srv_key_len, NULL, 0); + if (rv != 0) + { + TLS_DBG (1, " failed\n ! mbedtls_pk_parse_key returned %d", rv); + goto exit; + } + + /* + * 2. SSL context config + */ + if ((rv = mbedtls_ssl_config_defaults (&ctx->conf, MBEDTLS_SSL_IS_SERVER, + MBEDTLS_SSL_TRANSPORT_STREAM, + MBEDTLS_SSL_PRESET_DEFAULT)) != 0) + { + TLS_DBG (1, " failed\n ! mbedtls_ssl_config_defaults returned %d", rv); + goto exit; + } + + mbedtls_ssl_conf_rng (&ctx->conf, mbedtls_ctr_drbg_random, + tls_get_ctr_drbg ()); + mbedtls_ssl_conf_dbg (&ctx->conf, mbedtls_debug, stdout); + + /* TODO CACHE + mbedtls_ssl_conf_session_cache( &ctx->conf, &cache, + mbedtls_ssl_cache_get, + mbedtls_ssl_cache_set ); + */ + + mbedtls_ssl_conf_ca_chain (&ctx->conf, ctx->srvcert.next, NULL); + if ((rv = mbedtls_ssl_conf_own_cert (&ctx->conf, &ctx->srvcert, &ctx->pkey)) + != 0) + { + TLS_DBG (1, " failed\n ! mbedtls_ssl_conf_own_cert returned %d", rv); + goto exit; + } + + if ((rv = mbedtls_ssl_setup (&ctx->ssl, &ctx->conf)) != 0) + { + TLS_DBG (1, " failed\n ! mbedtls_ssl_setup returned %d", rv); + goto exit; + } + + mbedtls_ssl_session_reset (&ctx->ssl); + ctx_ptr = uword_to_pointer (tls_ctx_index (ctx), void *); + mbedtls_ssl_set_bio (&ctx->ssl, ctx_ptr, tls_net_send, tls_net_recv, NULL); + + mbedtls_debug_set_threshold (TLS_DEBUG_LEVEL_SERVER); + + /* + * 3. Start handshake state machine + */ + TLS_DBG (1, "Initiating handshake for [%u]%u", ctx->c_thread_index, + tls_ctx_index (ctx)); + while (ctx->ssl.state != MBEDTLS_SSL_HANDSHAKE_OVER) + { + rv = mbedtls_ssl_handshake_step (&ctx->ssl); + if (rv != 0) + break; + } + + TLS_DBG (2, "tls state for [%u]%u is %u", ctx->c_thread_index, + tls_ctx_index (ctx), ctx->ssl.state); + return 0; + +exit: + return -1; +} + +static int +tls_notify_app_accept (tls_ctx_t * ctx) +{ + stream_session_t *app_listener, *app_session; + segment_manager_t *sm; + application_t *app; + tls_ctx_t *lctx; + int rv; + + app = application_get (ctx->parent_app_index); + lctx = tls_listener_ctx_get (ctx->listener_ctx_index); + app_listener = listen_session_get_from_handle (lctx->app_session_handle); + sm = application_get_listen_segment_manager (app, app_listener); + + app_session = session_alloc (vlib_get_thread_index ()); + app_session->app_index = ctx->parent_app_index; + app_session->connection_index = tls_ctx_index (ctx); + app_session->session_type = app_listener->session_type; + app_session->listener_index = app_listener->session_index; + if ((rv = session_alloc_fifos (sm, app_session))) + { + TLS_DBG (1, "failed to allocate fifos"); + return rv; + } + ctx->c_s_index = app_session->session_index; + ctx->c_c_index = tls_ctx_index (ctx); + ctx->app_session_handle = session_handle (app_session); + return app->cb_fns.session_accept_callback (app_session); +} + +static int +tls_notify_app_connected (tls_ctx_t * ctx) +{ + int (*cb_fn) (u32, u32, stream_session_t *, u8); + stream_session_t *app_session; + segment_manager_t *sm; + application_t *app; + + app = application_get (ctx->parent_app_index); + cb_fn = app->cb_fns.session_connected_callback; + + sm = application_get_connect_segment_manager (app); + app_session = session_alloc (vlib_get_thread_index ()); + app_session->app_index = ctx->parent_app_index; + app_session->connection_index = tls_ctx_index (ctx); + app_session->session_type = + session_type_from_proto_and_ip (TRANSPORT_PROTO_TLS, ctx->tcp_is_ip4); + if (session_alloc_fifos (sm, app_session)) + goto failed; + + ctx->app_session_handle = session_handle (app_session); + ctx->c_s_index = app_session->session_index; + ctx->c_c_index = tls_ctx_index (ctx); + app_session->session_state = SESSION_STATE_READY; + if (cb_fn (ctx->parent_app_index, ctx->parent_app_api_context, + app_session, 0 /* not failed */ )) + { + TLS_DBG (1, "failed to notify app"); + tls_disconnect (tls_ctx_index (ctx), vlib_get_thread_index ()); + } + + return 0; + +failed: + return cb_fn (ctx->parent_app_index, ctx->parent_app_api_context, 0, + 1 /* failed */ ); +} + +static int +tls_handshake_rx (tls_ctx_t * ctx) +{ + u32 flags; + int rv; + while (ctx->ssl.state != MBEDTLS_SSL_HANDSHAKE_OVER) + { + rv = mbedtls_ssl_handshake_step (&ctx->ssl); + if (rv != 0) + break; + } + TLS_DBG (2, "tls state for %u is %u", tls_ctx_index (ctx), ctx->ssl.state); + + if (ctx->ssl.state != MBEDTLS_SSL_HANDSHAKE_OVER) + return 0; + + /* + * Handshake complete + */ + if (ctx->ssl.conf->endpoint == MBEDTLS_SSL_IS_CLIENT) + { + /* + * Verify server certificate + */ + if ((flags = mbedtls_ssl_get_verify_result (&ctx->ssl)) != 0) + { + char buf[512]; + TLS_DBG (1, " failed\n"); + mbedtls_x509_crt_verify_info (buf, sizeof (buf), " ! ", flags); + TLS_DBG (1, "%s\n", buf); + + /* For testing purposes not enforcing this */ + /* tls_disconnect (tls_ctx_index (ctx), vlib_get_thread_index ()); + return -1; + */ + } + tls_notify_app_connected (ctx); + } + else + { + tls_notify_app_accept (ctx); + } + + TLS_DBG (1, "Handshake for %u complete. TLS cipher is %x", + tls_ctx_index (ctx), ctx->ssl.session->ciphersuite); + return 0; +} + +void +tls_session_reset_callback (stream_session_t * s) +{ + clib_warning ("called..."); +} + +int +tls_add_segment_callback (u32 client_index, const ssvm_private_t * fs) +{ + /* No-op for builtin */ + return 0; +} + +int +tls_del_segment_callback (u32 client_index, const ssvm_private_t * fs) +{ + return 0; +} + +void +tls_session_disconnect_callback (stream_session_t * tls_session) +{ + stream_session_t *app_session; + tls_ctx_t *ctx; + application_t *app; + + ctx = tls_ctx_get (tls_session->opaque); + if (ctx->ssl.state != MBEDTLS_SSL_HANDSHAKE_OVER) + { + stream_session_disconnect (tls_session); + return; + } + ctx->is_passive_close = 1; + app = application_get (ctx->parent_app_index); + app_session = session_get_from_handle (ctx->app_session_handle); + app->cb_fns.session_disconnect_callback (app_session); +} + +int +tls_session_accept_callback (stream_session_t * tls_session) +{ + stream_session_t *tls_listener; + tls_ctx_t *lctx, *ctx; + u32 ctx_index; + + tls_listener = listen_session_get (tls_session->session_type, + tls_session->listener_index); + lctx = tls_listener_ctx_get (tls_listener->opaque); + ctx_index = tls_ctx_alloc (); + ctx = tls_ctx_get (ctx_index); + memcpy (ctx, lctx, sizeof (*lctx)); + ctx->c_thread_index = vlib_get_thread_index (); + tls_session->session_state = SESSION_STATE_READY; + tls_session->opaque = ctx_index; + ctx->tls_session_handle = session_handle (tls_session); + ctx->listener_ctx_index = tls_listener->opaque; + + TLS_DBG (1, "Accept on listener %u new connection [%u]%u", + tls_listener->opaque, vlib_get_thread_index (), ctx_index); + + return tls_ctx_init_server (ctx); +} + +int +tls_app_tx_callback (stream_session_t * app_session) +{ + stream_session_t *tls_session; + tls_ctx_t *ctx; + static u8 *tmp_buf; + u32 enq_max, deq_max, deq_now; + int wrote; + + ctx = tls_ctx_get (app_session->connection_index); + if (ctx->ssl.state != MBEDTLS_SSL_HANDSHAKE_OVER) + tls_add_vpp_q_evt (app_session->server_tx_fifo, FIFO_EVENT_APP_TX); + + deq_max = svm_fifo_max_dequeue (app_session->server_tx_fifo); + if (!deq_max) + return 0; + + tls_session = session_get_from_handle (ctx->tls_session_handle); + enq_max = svm_fifo_max_enqueue (tls_session->server_tx_fifo); + deq_now = clib_min (deq_max, TLS_CHUNK_SIZE); + + if (PREDICT_FALSE (enq_max == 0)) + { + tls_add_vpp_q_evt (app_session->server_tx_fifo, FIFO_EVENT_APP_TX); + return 0; + } + + vec_validate (tmp_buf, deq_now); + svm_fifo_peek (app_session->server_tx_fifo, 0, deq_now, tmp_buf); + wrote = mbedtls_ssl_write (&ctx->ssl, tmp_buf, deq_now); + if (wrote <= 0) + { + tls_add_vpp_q_evt (app_session->server_tx_fifo, FIFO_EVENT_APP_TX); + return 0; + } + + svm_fifo_dequeue_drop (app_session->server_tx_fifo, wrote); + vec_reset_length (tmp_buf); + + tls_add_vpp_q_evt (tls_session->server_tx_fifo, FIFO_EVENT_APP_TX); + + if (deq_now < deq_max) + tls_add_vpp_q_evt (app_session->server_tx_fifo, FIFO_EVENT_APP_TX); + + return 0; +} + +int +tls_app_rx_callback (stream_session_t * tls_session) +{ + stream_session_t *app_session; + u32 deq_max, enq_max, enq_now; + application_t *app; + static u8 *tmp_buf; + tls_ctx_t *ctx; + int read, enq; + + ctx = tls_ctx_get (tls_session->opaque); + if (ctx->ssl.state != MBEDTLS_SSL_HANDSHAKE_OVER) + return tls_handshake_rx (ctx); + + deq_max = svm_fifo_max_dequeue (tls_session->server_rx_fifo); + if (!deq_max) + return 0; + + app_session = session_get_from_handle (ctx->app_session_handle); + enq_max = svm_fifo_max_enqueue (app_session->server_rx_fifo); + enq_now = clib_min (enq_max, TLS_CHUNK_SIZE); + + if (PREDICT_FALSE (enq_now == 0)) + { + tls_add_vpp_q_evt (tls_session->server_rx_fifo, FIFO_EVENT_BUILTIN_RX); + return 0; + } + + vec_validate (tmp_buf, enq_now); + read = mbedtls_ssl_read (&ctx->ssl, tmp_buf, enq_now); + if (read <= 0) + { + tls_add_vpp_q_evt (tls_session->server_rx_fifo, FIFO_EVENT_BUILTIN_RX); + return 0; + } + + enq = svm_fifo_enqueue_nowait (app_session->server_rx_fifo, read, tmp_buf); + ASSERT (enq == read); + vec_reset_length (tmp_buf); + + if (svm_fifo_max_dequeue (tls_session->server_rx_fifo)) + tls_add_vpp_q_evt (tls_session->server_rx_fifo, FIFO_EVENT_BUILTIN_RX); + + app = application_get_if_valid (app_session->app_index); + return tls_add_app_q_evt (app, app_session); +} + +int +tls_session_connected_callback (u32 tls_app_index, u32 ho_ctx_index, + stream_session_t * tls_session, u8 is_fail) +{ + int (*cb_fn) (u32, u32, stream_session_t *, u8); + application_t *app; + tls_ctx_t *ho_ctx, *ctx; + u32 ctx_index; + + ho_ctx = tls_ctx_half_open_get (ho_ctx_index); + app = application_get (ho_ctx->parent_app_index); + cb_fn = app->cb_fns.session_connected_callback; + + if (is_fail) + goto failed; + + ctx_index = tls_ctx_alloc (); + ctx = tls_ctx_get (ctx_index); + clib_memcpy (ctx, ho_ctx, sizeof (*ctx)); + ctx->c_thread_index = vlib_get_thread_index (); + tls_ctx_half_open_reader_unlock (); + tls_ctx_half_open_free (ho_ctx_index); + + TLS_DBG (1, "TCP connect for %u returned %u. New connection [%u]%u", + ho_ctx_index, is_fail, vlib_get_thread_index (), + (ctx) ? ctx_index : ~0); + + ctx->tls_session_handle = session_handle (tls_session); + tls_session->opaque = ctx_index; + tls_session->session_state = SESSION_STATE_READY; + + return tls_ctx_init_client (ctx); + +failed: + tls_ctx_half_open_reader_unlock (); + tls_ctx_half_open_free (ho_ctx_index); + return cb_fn (ho_ctx->parent_app_index, ho_ctx->c_s_index, 0, + 1 /* failed */ ); +} + +/* *INDENT-OFF* */ +static session_cb_vft_t tls_app_cb_vft = { + .session_accept_callback = tls_session_accept_callback, + .session_disconnect_callback = tls_session_disconnect_callback, + .session_connected_callback = tls_session_connected_callback, + .session_reset_callback = tls_session_reset_callback, + .add_segment_callback = tls_add_segment_callback, + .del_segment_callback = tls_del_segment_callback, + .builtin_app_rx_callback = tls_app_rx_callback, + .builtin_app_tx_callback = tls_app_tx_callback, +}; +/* *INDENT-ON* */ + +int +tls_connect (transport_endpoint_t * tep) +{ + session_endpoint_extended_t *sep; + session_endpoint_t tls_sep; + tls_main_t *tm = &tls_main; + application_t *app; + tls_ctx_t *ctx; + u32 ctx_index; + int rv; + + sep = (session_endpoint_extended_t *) tep; + + ctx_index = tls_ctx_half_open_alloc (); + ctx = tls_ctx_half_open_get (ctx_index); + ctx->parent_app_index = sep->app_index; + ctx->parent_app_api_context = sep->opaque; + ctx->tcp_is_ip4 = sep->is_ip4; + tls_ctx_half_open_reader_unlock (); + + app = application_get (sep->app_index); + application_alloc_connects_segment_manager (app); + + clib_memcpy (&tls_sep, sep, sizeof (tls_sep)); + tls_sep.transport_proto = TRANSPORT_PROTO_TCP; + if ((rv = application_connect (tm->app_index, ctx_index, &tls_sep))) + return rv; + + TLS_DBG (1, "New connect request %u", ctx_index); + return 0; +} + +void +tls_disconnect (u32 ctx_index, u32 thread_index) +{ + stream_session_t *tls_session, *app_session; + tls_ctx_t *ctx; + + TLS_DBG (1, "Disconnecting %u", ctx_index); + + ctx = tls_ctx_get (ctx_index); + if (ctx->ssl.state == MBEDTLS_SSL_HANDSHAKE_OVER && !ctx->is_passive_close) + mbedtls_ssl_close_notify (&ctx->ssl); + + tls_session = session_get_from_handle (ctx->tls_session_handle); + stream_session_disconnect (tls_session); + + app_session = session_get_from_handle_if_valid (ctx->app_session_handle); + if (app_session) + { + segment_manager_dealloc_fifos (app_session->svm_segment_index, + app_session->server_rx_fifo, + app_session->server_tx_fifo); + session_free (app_session); + } + tls_ctx_free (ctx); +} + +u32 +tls_start_listen (u32 app_listener_index, transport_endpoint_t * tep) +{ + tls_main_t *tm = &tls_main; + application_t *tls_app; + session_handle_t tls_handle; + session_endpoint_extended_t *sep; + stream_session_t *tls_listener; + tls_ctx_t *lctx; + u32 lctx_index; + session_type_t st; + stream_session_t *app_listener; + + sep = (session_endpoint_extended_t *) tep; + lctx_index = tls_listener_ctx_alloc (); + lctx = tls_listener_ctx_get (lctx_index); + st = session_type_from_proto_and_ip (sep->transport_proto, sep->is_ip4); + app_listener = listen_session_get (st, app_listener_index); + + tls_app = application_get (tm->app_index); + sep->transport_proto = TRANSPORT_PROTO_TCP; + if (application_start_listen (tls_app, (session_endpoint_t *) sep, + &tls_handle)) + return ~0; + + tls_listener = listen_session_get_from_handle (tls_handle); + tls_listener->opaque = lctx_index; + lctx->parent_app_index = sep->app_index; + lctx->tls_session_handle = tls_handle; + lctx->app_session_handle = listen_session_get_handle (app_listener); + lctx->tcp_is_ip4 = sep->is_ip4; + return lctx_index; +} + +u32 +tls_stop_listen (u32 listener_index) +{ + clib_warning ("TBD"); + return 0; +} + +transport_connection_t * +tls_listener_get (u32 listener_index) +{ + tls_ctx_t *ctx; + ctx = tls_listener_ctx_get (listener_index); + return &ctx->connection; +} + +u8 * +format_tls_ctx (u8 * s, va_list * args) +{ + tls_ctx_t *ctx = va_arg (*args, tls_ctx_t *); + u32 thread_index = va_arg (*args, u32); + u32 child_si, child_ti; + + session_parse_handle (ctx->tls_session_handle, &child_si, &child_ti); + if (thread_index != child_ti) + clib_warning ("app and tls sessions are on different threads!"); + + s = + format (s, "[#%d][TLS] app %u child %u", child_ti, ctx->parent_app_index, + child_si); + return s; +} + +u8 * +format_tls_connection (u8 * s, va_list * args) +{ + u32 ctx_index = va_arg (*args, u32); + u32 thread_index = va_arg (*args, u32); + u32 verbose = va_arg (*args, u32); + tls_ctx_t *ctx; + + ctx = tls_ctx_get_w_thread (ctx_index, thread_index); + if (!ctx) + return s; + + s = format (s, "%-50U", format_tls_ctx, ctx, thread_index); + if (verbose) + { + s = format (s, "%-15s", "state"); + if (verbose > 1) + s = format (s, "\n"); + } + return s; +} + +u8 * +format_tls_listener (u8 * s, va_list * args) +{ + u32 tc_index = va_arg (*args, u32); + tls_ctx_t *ctx = tls_listener_ctx_get (tc_index); + u32 listener_index, type; + + listen_session_parse_handle (ctx->tls_session_handle, &type, + &listener_index); + return format (s, "[TLS] listener app %u child %u", ctx->parent_app_index, + listener_index); +} + +u8 * +format_tls_half_open (u8 * s, va_list * args) +{ + u32 tc_index = va_arg (*args, u32); + tls_ctx_t *ctx = tls_ctx_half_open_get (tc_index); + s = format (s, "[TLS] half-open app %u", ctx->parent_app_index); + tls_ctx_half_open_reader_unlock (); + return s; +} + +/* *INDENT-OFF* */ +const static transport_proto_vft_t tls_proto = { + .open = tls_connect, + .close = tls_disconnect, + .bind = tls_start_listen, + .get_listener = tls_listener_get, + .unbind = tls_stop_listen, + .tx_type = TRANSPORT_TX_INTERNAL, + .service_type = TRANSPORT_SERVICE_APP, + .format_connection = format_tls_connection, + .format_half_open = format_tls_half_open, + .format_listener = format_tls_listener, +}; +/* *INDENT-ON* */ + +int +tls_init_mem (void) +{ +#if TLS_USE_OUR_MEM_FUNCS + mbedtls_platform_set_calloc_free (mbedtls_calloc_fn, mbedtls_free_fn); +#endif + return 0; +} + +int +tls_init_ca_chain (void) +{ + tls_main_t *tm = &tls_main; + int rv; + + /* TODO config */ + mbedtls_x509_crt_init (&tm->cacert); + rv = mbedtls_x509_crt_parse (&tm->cacert, + (const unsigned char *) mbedtls_test_cas_pem, + mbedtls_test_cas_pem_len); + if (rv < 0) + { + clib_warning ("mbedtls_x509_crt_parse returned -0x%x", -rv); + return -1; + } + return 0; +} + +clib_error_t * +tls_init (vlib_main_t * vm) +{ + vlib_thread_main_t *vtm = vlib_get_thread_main (); + u32 fifo_size = 64 << 10, num_threads; + vnet_app_attach_args_t _a, *a = &_a; + u64 options[APP_OPTIONS_N_OPTIONS]; + u32 segment_size = 512 << 20; + tls_main_t *tm = &tls_main; + + num_threads = 1 /* main thread */ + vtm->n_threads; + + if (tls_init_mem ()) + { + clib_warning ("failed to initialize mem"); + return clib_error_return (0, "failed to initalize mem"); + } + if (tls_init_ca_chain ()) + { + clib_warning ("failed to initialize TLS CA chain"); + return clib_error_return (0, "failed to initalize TLS CA chain"); + } + if (tls_init_ctr_drbgs_and_entropy (num_threads)) + { + clib_warning ("failed to initialize entropy and random generators"); + return clib_error_return (0, "failed to initialize entropy and random " + "generators"); + } + + memset (a, 0, sizeof (*a)); + memset (options, 0, sizeof (options)); + + a->session_cb_vft = &tls_app_cb_vft; + a->api_client_index = (1 << 24) + 1; + a->options = options; + a->options[APP_OPTIONS_SEGMENT_SIZE] = segment_size; + a->options[APP_OPTIONS_RX_FIFO_SIZE] = fifo_size; + a->options[APP_OPTIONS_TX_FIFO_SIZE] = fifo_size; + a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN; + a->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE; + + if (vnet_application_attach (a)) + { + clib_warning ("failed to attach tls app"); + return clib_error_return (0, "failed to attach tls app"); + } + + tm->app_index = a->app_index; + vec_validate (tm->ctx_pool, num_threads - 1); + clib_rwlock_init (&tm->half_open_rwlock); + + transport_register_protocol (TRANSPORT_PROTO_TLS, &tls_proto, + FIB_PROTOCOL_IP4, ~0); + transport_register_protocol (TRANSPORT_PROTO_TLS, &tls_proto, + FIB_PROTOCOL_IP6, ~0); + + return 0; +} + +VLIB_INIT_FUNCTION (tls_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |