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authorFlorin Coras <fcoras@cisco.com>2018-03-07 08:49:27 -0800
committerDave Barach <openvpp@barachs.net>2018-03-08 21:53:33 +0000
commitd77eee64b17762bf21f8dbe0b9f955513f81f1a5 (patch)
treedf26a38a15be4537fec42082083b755e79418202 /src/vnet/session-apps
parent00f44cc1f7f3cc10c0d6b147c0bceb831a9e97fb (diff)
tls: make tls engines pluggable
- add infra for pluggable tls "engines" - makes mbedtls specific code a plugin Change-Id: I2c5b099e2b69d2be0038e3ef02b208ff907727e7 Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vnet/session-apps')
-rw-r--r--src/vnet/session-apps/tls.c1234
1 files changed, 0 insertions, 1234 deletions
diff --git a/src/vnet/session-apps/tls.c b/src/vnet/session-apps/tls.c
deleted file mode 100644
index d71dfb43d3c..00000000000
--- a/src/vnet/session-apps/tls.c
+++ /dev/null
@@ -1,1234 +0,0 @@
-/*
- * 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
-#define TLS_CA_CERT_PATH "/etc/ssl/certs/ca-certificates.crt"
-
-#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* */
-
-STATIC_ASSERT (sizeof (tls_ctx_id_t) <= 42, "ctx id must be less than 42");
-
-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
-#define tls_ctx_idx c_c_index
- /* 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;
- u8 *srv_hostname;
- 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;
-
- /*
- * Config
- */
- u8 use_test_cert_in_ca;
- char *ca_cert_path;
-} 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);
- if (!(*ctx))
- *ctx = clib_mem_alloc (sizeof (tls_ctx_t));
-
- memset (*ctx, 0, sizeof (tls_ctx_t));
- (*ctx)->c_thread_index = thread_index;
- return ctx - tm->ctx_pool[thread_index];
-}
-
-void
-tls_ctx_free (tls_ctx_t * ctx)
-{
- vec_free (ctx->srv_hostname);
- pool_put_index (tls_main.ctx_pool[vlib_get_thread_index ()],
- ctx->tls_ctx_idx);
-}
-
-tls_ctx_t *
-tls_ctx_get (u32 ctx_index)
-{
- tls_ctx_t **ctx;
- ctx = pool_elt_at_index (tls_main.ctx_pool[vlib_get_thread_index ()],
- ctx_index);
- return (*ctx);
-}
-
-tls_ctx_t *
-tls_ctx_get_w_thread (u32 ctx_index, u8 thread_index)
-{
- tls_ctx_t **ctx;
- ctx = pool_elt_at_index (tls_main.ctx_pool[thread_index], ctx_index);
- return (*ctx);
-}
-
-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_listener_ctx_free (tls_ctx_t * ctx)
-{
- pool_put (tls_main.listener_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,
- (const char *) ctx->srv_hostname)) != 0)
- {
- TLS_DBG (1, "failed\n ! mbedtls_ssl_set_hostname returned %d\n", rv);
- return -1;
- }
-
- ctx_ptr = uword_to_pointer (ctx->tls_ctx_idx, 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,
- ctx->tls_ctx_idx);
- 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,
- ctx->tls_ctx_idx, ctx->ssl.state);
- return 0;
-}
-
-static int
-tls_ctx_init_server (tls_ctx_t * ctx)
-{
- tls_main_t *tm = &tls_main;
- 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,
- vec_len (app->tls_cert));
- 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,
- vec_len (app->tls_key), 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, &tm->cacert, 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 (ctx->tls_ctx_idx, 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,
- ctx->tls_ctx_idx);
- 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,
- ctx->tls_ctx_idx, 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 = ctx->tls_ctx_idx;
- 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->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, u8 is_failed)
-{
- 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;
-
- if (is_failed)
- goto failed;
-
- 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 = ctx->tls_ctx_idx;
- 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;
- 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 (ctx->tls_ctx_idx, 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", ctx->tls_ctx_idx, 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);
-
- /*
- * Presence of hostname enforces strict certificate verification
- */
- if (ctx->srv_hostname)
- {
- tls_disconnect (ctx->tls_ctx_idx, vlib_get_thread_index ());
- tls_notify_app_connected (ctx, /* is failed */ 1);
- return -1;
- }
- }
- tls_notify_app_connected (ctx, /* is failed */ 0);
- }
- else
- {
- tls_notify_app_accept (ctx);
- }
-
- TLS_DBG (1, "Handshake for %u complete. TLS cipher is %x",
- ctx->tls_ctx_idx, 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 ();
- ctx->tls_ctx_idx = ctx_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)
- {
- 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 */ );
- }
-
- ctx_index = tls_ctx_alloc ();
- ctx = tls_ctx_get (ctx_index);
- clib_memcpy (ctx, ho_ctx, sizeof (*ctx));
- tls_ctx_half_open_reader_unlock ();
- tls_ctx_half_open_free (ho_ctx_index);
-
- ctx->c_thread_index = vlib_get_thread_index ();
- ctx->tls_ctx_idx = 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);
-}
-
-/* *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;
- if (sep->hostname)
- {
- ctx->srv_hostname = format (0, "%v", sep->hostname);
- vec_terminate_c_string (ctx->srv_hostname);
- }
- 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);
- }
- if (ctx->ssl.conf->endpoint == MBEDTLS_SSL_IS_SERVER)
- {
- mbedtls_x509_crt_free (&ctx->srvcert);
- mbedtls_pk_free (&ctx->pkey);
- }
- mbedtls_ssl_free (&ctx->ssl);
- mbedtls_ssl_config_free (&ctx->conf);
- 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 lctx_index)
-{
- tls_main_t *tm = &tls_main;
- application_t *tls_app;
- tls_ctx_t *lctx;
- lctx = tls_listener_ctx_get (lctx_index);
- tls_app = application_get (tm->app_index);
- application_stop_listen (tls_app, lctx->tls_session_handle);
- tls_listener_ctx_free (lctx);
- return 0;
-}
-
-transport_connection_t *
-tls_connection_get (u32 ctx_index, u32 thread_index)
-{
- tls_ctx_t *ctx;
- ctx = tls_ctx_get_w_thread (ctx_index, thread_index);
- return &ctx->connection;
-}
-
-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_connection = tls_connection_get,
- .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;
-
- if (!tm->ca_cert_path)
- tm->ca_cert_path = TLS_CA_CERT_PATH;
-
- if (access (tm->ca_cert_path, F_OK | R_OK) == -1)
- {
- clib_warning ("Could not initialize TLS CA certificates");
- return -1;
- }
-
- mbedtls_x509_crt_init (&tm->cacert);
- rv = mbedtls_x509_crt_parse_file (&tm->cacert, tm->ca_cert_path);
- if (rv < 0)
- {
- clib_warning ("Couldn't parse system CA certificates: -0x%x", -rv);
- }
- if (tm->use_test_cert_in_ca)
- {
- rv = mbedtls_x509_crt_parse (&tm->cacert,
- (const unsigned char *) test_srv_crt_rsa,
- test_srv_crt_rsa_len);
- if (rv < 0)
- {
- clib_warning ("Couldn't parse test certificate: -0x%x", -rv);
- return -1;
- }
- }
- return (rv < 0 ? -1 : 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);
-
-static clib_error_t *
-tls_config_fn (vlib_main_t * vm, unformat_input_t * input)
-{
- tls_main_t *tm = &tls_main;
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat (input, "use-test-cert-in-ca"))
- tm->use_test_cert_in_ca = 1;
- else if (unformat (input, "ca-cert-path %s", &tm->ca_cert_path))
- ;
- else
- return clib_error_return (0, "unknown input `%U'",
- format_unformat_error, input);
- }
- return 0;
-}
-
-VLIB_EARLY_CONFIG_FUNCTION (tls_config_fn, "tls");
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */