2 * Copyright (c) 2018 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <openssl/ssl.h>
17 #include <openssl/conf.h>
18 #include <openssl/err.h>
20 #ifdef HAVE_OPENSSL_ASYNC
21 #include <openssl/async.h>
24 #include <vnet/plugin/plugin.h>
25 #include <vpp/app/version.h>
26 #include <vnet/tls/tls.h>
28 #include <tlsopenssl/tls_openssl.h>
29 #include <tlsopenssl/tls_bios.h>
31 #define MAX_CRYPTO_LEN 64
33 openssl_main_t openssl_main;
36 openssl_ctx_alloc_w_thread (u32 thread_index)
38 openssl_main_t *om = &openssl_main;
41 pool_get (om->ctx_pool[thread_index], ctx);
43 *ctx = clib_mem_alloc (sizeof (openssl_ctx_t));
45 clib_memset (*ctx, 0, sizeof (openssl_ctx_t));
46 (*ctx)->ctx.c_thread_index = thread_index;
47 (*ctx)->ctx.tls_ctx_engine = CRYPTO_ENGINE_OPENSSL;
48 (*ctx)->ctx.app_session_handle = SESSION_INVALID_HANDLE;
49 (*ctx)->openssl_ctx_index = ctx - om->ctx_pool[thread_index];
50 return ((*ctx)->openssl_ctx_index);
54 openssl_ctx_alloc (void)
56 return openssl_ctx_alloc_w_thread (vlib_get_thread_index ());
60 openssl_ctx_free (tls_ctx_t * ctx)
62 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
64 /* Cleanup ssl ctx unless migrated */
65 if (!ctx->is_migrated)
67 if (SSL_is_init_finished (oc->ssl) && !ctx->is_passive_close)
68 SSL_shutdown (oc->ssl);
71 vec_free (ctx->srv_hostname);
73 #ifdef HAVE_OPENSSL_ASYNC
74 openssl_evt_free (ctx->evt_index, ctx->c_thread_index);
78 pool_put_index (openssl_main.ctx_pool[ctx->c_thread_index],
79 oc->openssl_ctx_index);
83 openssl_ctx_detach (tls_ctx_t *ctx)
85 openssl_ctx_t *oc = (openssl_ctx_t *) ctx, *oc_copy;
87 oc_copy = clib_mem_alloc (sizeof (*oc_copy));
88 clib_memcpy (oc_copy, oc, sizeof (*oc));
94 openssl_ctx_attach (u32 thread_index, void *ctx_ptr)
96 openssl_main_t *om = &openssl_main;
100 pool_get (om->ctx_pool[thread_index], oc);
101 /* Free the old instance instead of looking for an empty spot */
106 (*oc)->openssl_ctx_index = oc - om->ctx_pool[thread_index];
107 (*oc)->ctx.c_thread_index = thread_index;
109 sh = (*oc)->ctx.tls_session_handle;
110 BIO_set_data ((*oc)->rbio, uword_to_pointer (sh, void *));
111 BIO_set_data ((*oc)->wbio, uword_to_pointer (sh, void *));
113 return ((*oc)->openssl_ctx_index);
117 openssl_ctx_get (u32 ctx_index)
120 ctx = pool_elt_at_index (openssl_main.ctx_pool[vlib_get_thread_index ()],
126 openssl_ctx_get_w_thread (u32 ctx_index, u8 thread_index)
129 ctx = pool_elt_at_index (openssl_main.ctx_pool[thread_index], ctx_index);
134 openssl_listen_ctx_alloc (void)
136 openssl_main_t *om = &openssl_main;
137 openssl_listen_ctx_t *lctx;
139 pool_get (om->lctx_pool, lctx);
141 clib_memset (lctx, 0, sizeof (openssl_listen_ctx_t));
142 lctx->openssl_lctx_index = lctx - om->lctx_pool;
143 return lctx->openssl_lctx_index;
147 openssl_listen_ctx_free (openssl_listen_ctx_t * lctx)
149 pool_put_index (openssl_main.lctx_pool, lctx->openssl_lctx_index);
152 openssl_listen_ctx_t *
153 openssl_lctx_get (u32 lctx_index)
155 return pool_elt_at_index (openssl_main.lctx_pool, lctx_index);
158 #define ossl_check_err_is_fatal(_ssl, _rv) \
159 if (PREDICT_FALSE (_rv < 0 && SSL_get_error (_ssl, _rv) == SSL_ERROR_SSL)) \
163 openssl_read_from_ssl_into_fifo (svm_fifo_t * f, SSL * ssl)
165 int read, rv, n_fs, i;
166 const int n_segs = 2;
167 svm_fifo_seg_t fs[n_segs];
170 max_enq = svm_fifo_max_enqueue_prod (f);
174 n_fs = svm_fifo_provision_chunks (f, fs, n_segs, max_enq);
178 /* Return early if we can't read anything */
179 read = SSL_read (ssl, fs[0].data, fs[0].len);
182 ossl_check_err_is_fatal (ssl, read);
186 for (i = 1; i < n_fs; i++)
188 rv = SSL_read (ssl, fs[i].data, fs[i].len);
189 read += rv > 0 ? rv : 0;
191 if (rv < (int) fs[i].len)
193 ossl_check_err_is_fatal (ssl, rv);
198 svm_fifo_enqueue_nocopy (f, read);
204 openssl_write_from_fifo_into_ssl (svm_fifo_t *f, SSL *ssl, u32 max_len)
206 int wrote = 0, rv, i = 0, len;
208 svm_fifo_seg_t fs[n_segs];
210 len = svm_fifo_segments (f, 0, fs, &n_segs, max_len);
214 while (wrote < len && i < n_segs)
216 rv = SSL_write (ssl, fs[i].data, fs[i].len);
217 wrote += (rv > 0) ? rv : 0;
218 if (rv < (int) fs[i].len)
220 ossl_check_err_is_fatal (ssl, rv);
227 svm_fifo_dequeue_drop (f, wrote);
232 #ifdef HAVE_OPENSSL_ASYNC
234 openssl_check_async_status (tls_ctx_t * ctx, openssl_resume_handler * handler,
237 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
240 SSL_get_async_status (oc->ssl, &estatus);
241 if (estatus == ASYNC_STATUS_EAGAIN)
243 vpp_tls_async_update_event (ctx, 1);
247 vpp_tls_async_update_event (ctx, 0);
257 openssl_handle_handshake_failure (tls_ctx_t * ctx)
259 session_t *app_session;
261 if (SSL_is_server (((openssl_ctx_t *) ctx)->ssl))
264 * Cleanup pre-allocated app session and close transport
267 session_get_if_valid (ctx->c_s_index, ctx->c_thread_index);
270 session_free (app_session);
271 ctx->no_app_session = 1;
272 ctx->c_s_index = SESSION_INVALID_INDEX;
273 tls_disconnect_transport (ctx);
279 * Also handles cleanup of the pre-allocated session
281 tls_notify_app_connected (ctx, SESSION_E_TLS_HANDSHAKE);
282 tls_disconnect_transport (ctx);
287 openssl_ctx_handshake_rx (tls_ctx_t * ctx, session_t * tls_session)
289 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
292 while (SSL_in_init (oc->ssl))
298 else if (!svm_fifo_max_dequeue_cons (tls_session->rx_fifo))
301 rv = SSL_do_handshake (oc->ssl);
302 err = SSL_get_error (oc->ssl, rv);
304 #ifdef HAVE_OPENSSL_ASYNC
305 if (err == SSL_ERROR_WANT_ASYNC)
307 openssl_check_async_status (ctx, openssl_ctx_handshake_rx,
311 if (err == SSL_ERROR_SSL)
314 ERR_error_string (ERR_get_error (), buf);
315 clib_warning ("Err: %s", buf);
317 openssl_handle_handshake_failure (ctx);
321 if (err != SSL_ERROR_WANT_WRITE && err != SSL_ERROR_WANT_READ)
324 TLS_DBG (2, "tls state for %u is %s", oc->openssl_ctx_index,
325 SSL_state_string_long (oc->ssl));
327 if (SSL_in_init (oc->ssl))
333 if (!SSL_is_server (oc->ssl))
336 * Verify server certificate
338 if ((rv = SSL_get_verify_result (oc->ssl)) != X509_V_OK)
340 TLS_DBG (1, " failed verify: %s\n",
341 X509_verify_cert_error_string (rv));
344 * Presence of hostname enforces strict certificate verification
346 if (ctx->srv_hostname)
348 openssl_handle_handshake_failure (ctx);
352 tls_notify_app_connected (ctx, SESSION_E_NONE);
356 /* Need to check transport status */
357 if (ctx->is_passive_close)
359 openssl_handle_handshake_failure (ctx);
363 /* Accept failed, cleanup */
364 if (tls_notify_app_accept (ctx))
366 ctx->c_s_index = SESSION_INVALID_INDEX;
367 tls_disconnect_transport (ctx);
372 TLS_DBG (1, "Handshake for %u complete. TLS cipher is %s",
373 oc->openssl_ctx_index, SSL_get_cipher (oc->ssl));
378 openssl_confirm_app_close (tls_ctx_t * ctx)
380 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
381 SSL_shutdown (oc->ssl);
382 tls_disconnect_transport (ctx);
383 session_transport_closed_notify (&ctx->connection);
387 openssl_ctx_write_tls (tls_ctx_t *ctx, session_t *app_session,
388 transport_send_params_t *sp)
390 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
391 u32 deq_max, space, enq_buf;
396 ts = session_get_from_handle (ctx->tls_session_handle);
397 space = svm_fifo_max_enqueue_prod (ts->tx_fifo);
398 /* Leave a bit of extra space for tls ctrl data, if any needed */
399 space = clib_max ((int) space - TLSO_CTRL_BYTES, 0);
401 f = app_session->tx_fifo;
403 deq_max = svm_fifo_max_dequeue_cons (f);
404 deq_max = clib_min (deq_max, space);
408 deq_max = clib_min (deq_max, sp->max_burst_size);
410 /* Make sure tcp's tx fifo can actually buffer all bytes to be dequeued.
411 * If under memory pressure, tls's fifo segment might not be able to
412 * allocate the chunks needed. This also avoids errors from the underlying
413 * custom bio to the ssl infra which at times can get stuck. */
414 if (svm_fifo_provision_chunks (ts->tx_fifo, 0, 0, deq_max + TLSO_CTRL_BYTES))
417 wrote = openssl_write_from_fifo_into_ssl (f, oc->ssl, deq_max);
419 /* Unrecoverable protocol error. Reset connection */
420 if (PREDICT_FALSE (wrote < 0))
422 tls_notify_app_io_error (ctx);
429 if (svm_fifo_needs_deq_ntf (f, wrote))
430 session_dequeue_notify (app_session);
434 if (PREDICT_FALSE (ctx->app_closed && BIO_ctrl_pending (oc->rbio) <= 0))
435 openssl_confirm_app_close (ctx);
437 /* Deschedule and wait for deq notification if fifo is almost full */
438 enq_buf = clib_min (svm_fifo_size (ts->tx_fifo) / 2, TLSO_MIN_ENQ_SPACE);
439 if (space < wrote + enq_buf)
441 svm_fifo_add_want_deq_ntf (ts->tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
442 transport_connection_deschedule (&ctx->connection);
443 sp->flags |= TRANSPORT_SND_F_DESCHED;
446 /* Request tx reschedule of the app session */
447 app_session->flags |= SESSION_F_CUSTOM_TX;
453 openssl_ctx_write_dtls (tls_ctx_t *ctx, session_t *app_session,
454 transport_send_params_t *sp)
456 openssl_main_t *om = &openssl_main;
457 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
458 u32 read = 0, to_deq, dgram_sz, enq_max;
459 session_dgram_pre_hdr_t hdr;
464 us = session_get_from_handle (ctx->tls_session_handle);
465 to_deq = svm_fifo_max_dequeue_cons (app_session->tx_fifo);
466 buf = om->tx_bufs[ctx->c_thread_index];
470 /* Peeking only pre-header dgram because the session is connected */
471 rv = svm_fifo_peek (app_session->tx_fifo, 0, sizeof (hdr), (u8 *) &hdr);
472 ASSERT (rv == sizeof (hdr) && hdr.data_length < vec_len (buf));
473 ASSERT (to_deq >= hdr.data_length + SESSION_CONN_HDR_LEN);
475 dgram_sz = hdr.data_length + SESSION_CONN_HDR_LEN;
476 enq_max = dgram_sz + TLSO_CTRL_BYTES;
477 if (svm_fifo_max_enqueue_prod (us->tx_fifo) < enq_max ||
478 svm_fifo_provision_chunks (us->tx_fifo, 0, 0, enq_max))
480 svm_fifo_add_want_deq_ntf (us->tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
481 transport_connection_deschedule (&ctx->connection);
482 sp->flags |= TRANSPORT_SND_F_DESCHED;
486 rv = svm_fifo_peek (app_session->tx_fifo, SESSION_CONN_HDR_LEN,
487 hdr.data_length, buf);
488 ASSERT (rv == hdr.data_length);
489 svm_fifo_dequeue_drop (app_session->tx_fifo, dgram_sz);
491 wrote = SSL_write (oc->ssl, buf, rv);
500 if (svm_fifo_needs_deq_ntf (app_session->tx_fifo, read))
501 session_dequeue_notify (app_session);
504 tls_add_vpp_q_tx_evt (us);
506 if (PREDICT_FALSE (ctx->app_closed &&
507 !svm_fifo_max_enqueue_prod (us->rx_fifo)))
508 openssl_confirm_app_close (ctx);
514 openssl_ctx_write (tls_ctx_t *ctx, session_t *app_session,
515 transport_send_params_t *sp)
517 if (ctx->tls_type == TRANSPORT_PROTO_TLS)
518 return openssl_ctx_write_tls (ctx, app_session, sp);
520 return openssl_ctx_write_dtls (ctx, app_session, sp);
524 openssl_ctx_read_tls (tls_ctx_t *ctx, session_t *tls_session)
526 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
527 session_t *app_session;
531 if (PREDICT_FALSE (SSL_in_init (oc->ssl)))
533 if (openssl_ctx_handshake_rx (ctx, tls_session) < 0)
537 app_session = session_get_from_handle (ctx->app_session_handle);
538 f = app_session->rx_fifo;
540 read = openssl_read_from_ssl_into_fifo (f, oc->ssl);
542 /* Unrecoverable protocol error. Reset connection */
543 if (PREDICT_FALSE (read < 0))
545 tls_notify_app_io_error (ctx);
549 /* If handshake just completed, session may still be in accepting state */
550 if (read && app_session->session_state >= SESSION_STATE_READY)
551 tls_notify_app_enqueue (ctx, app_session);
553 if ((SSL_pending (oc->ssl) > 0) ||
554 svm_fifo_max_dequeue_cons (tls_session->rx_fifo))
555 tls_add_vpp_q_builtin_rx_evt (tls_session);
561 openssl_ctx_read_dtls (tls_ctx_t *ctx, session_t *us)
563 openssl_main_t *om = &openssl_main;
564 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
565 session_dgram_hdr_t hdr;
566 session_t *app_session;
571 if (PREDICT_FALSE (SSL_in_init (oc->ssl)))
573 u32 us_index = us->session_index;
574 if (openssl_ctx_handshake_rx (ctx, us) < 0)
576 /* Session pool might grow when allocating the app's session */
577 us = session_get (us_index, ctx->c_thread_index);
580 buf = om->rx_bufs[ctx->c_thread_index];
581 app_session = session_get_from_handle (ctx->app_session_handle);
582 svm_fifo_fill_chunk_list (app_session->rx_fifo);
584 while (svm_fifo_max_dequeue_cons (us->rx_fifo) > 0)
586 if (svm_fifo_max_enqueue_prod (app_session->rx_fifo) < DTLSO_MAX_DGRAM)
588 tls_add_vpp_q_builtin_rx_evt (us);
592 read = SSL_read (oc->ssl, buf, vec_len (buf));
593 if (PREDICT_FALSE (read <= 0))
596 tls_add_vpp_q_builtin_rx_evt (us);
601 hdr.data_length = read;
604 svm_fifo_seg_t segs[2] = { { (u8 *) &hdr, sizeof (hdr) },
607 rv = svm_fifo_enqueue_segments (app_session->rx_fifo, segs, 2,
608 0 /* allow partial */);
614 /* If handshake just completed, session may still be in accepting state */
615 if (app_session->session_state >= SESSION_STATE_READY)
616 tls_notify_app_enqueue (ctx, app_session);
622 openssl_ctx_read (tls_ctx_t *ctx, session_t *ts)
624 if (ctx->tls_type == TRANSPORT_PROTO_TLS)
625 return openssl_ctx_read_tls (ctx, ts);
627 return openssl_ctx_read_dtls (ctx, ts);
631 openssl_ctx_init_client (tls_ctx_t * ctx)
633 long flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_COMPRESSION;
634 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
635 openssl_main_t *om = &openssl_main;
636 const SSL_METHOD *method;
639 method = ctx->tls_type == TRANSPORT_PROTO_TLS ? SSLv23_client_method () :
640 DTLS_client_method ();
643 TLS_DBG (1, "(D)TLS_method returned null");
647 oc->ssl_ctx = SSL_CTX_new (method);
648 if (oc->ssl_ctx == NULL)
650 TLS_DBG (1, "SSL_CTX_new returned null");
654 SSL_CTX_set_ecdh_auto (oc->ssl_ctx, 1);
655 SSL_CTX_set_mode (oc->ssl_ctx, SSL_MODE_ENABLE_PARTIAL_WRITE);
656 #ifdef HAVE_OPENSSL_ASYNC
658 SSL_CTX_set_mode (oc->ssl_ctx, SSL_MODE_ASYNC);
660 rv = SSL_CTX_set_cipher_list (oc->ssl_ctx, (const char *) om->ciphers);
663 TLS_DBG (1, "Couldn't set cipher");
667 SSL_CTX_set_options (oc->ssl_ctx, flags);
668 SSL_CTX_set_cert_store (oc->ssl_ctx, om->cert_store);
670 oc->ssl = SSL_new (oc->ssl_ctx);
673 TLS_DBG (1, "Couldn't initialize ssl struct");
677 if (ctx->tls_type == TRANSPORT_PROTO_TLS)
679 oc->rbio = BIO_new_tls (ctx->tls_session_handle);
680 oc->wbio = BIO_new_tls (ctx->tls_session_handle);
684 oc->rbio = BIO_new_dtls (ctx->tls_session_handle);
685 oc->wbio = BIO_new_dtls (ctx->tls_session_handle);
688 SSL_set_bio (oc->ssl, oc->wbio, oc->rbio);
689 SSL_set_connect_state (oc->ssl);
691 rv = SSL_set_tlsext_host_name (oc->ssl, ctx->srv_hostname);
694 TLS_DBG (1, "Couldn't set hostname");
699 * 2. Do the first steps in the handshake.
701 TLS_DBG (1, "Initiating handshake for [%u]%u", ctx->c_thread_index,
702 oc->openssl_ctx_index);
704 #ifdef HAVE_OPENSSL_ASYNC
705 session_t *tls_session = session_get_from_handle (ctx->tls_session_handle);
706 vpp_tls_async_init_event (ctx, openssl_ctx_handshake_rx, tls_session);
710 rv = SSL_do_handshake (oc->ssl);
711 err = SSL_get_error (oc->ssl, rv);
712 #ifdef HAVE_OPENSSL_ASYNC
713 if (err == SSL_ERROR_WANT_ASYNC)
715 openssl_check_async_status (ctx, openssl_ctx_handshake_rx,
720 if (err != SSL_ERROR_WANT_WRITE)
724 TLS_DBG (2, "tls state for [%u]%u is su", ctx->c_thread_index,
725 oc->openssl_ctx_index, SSL_state_string_long (oc->ssl));
730 openssl_start_listen (tls_ctx_t * lctx)
732 const SSL_METHOD *method;
739 openssl_listen_ctx_t *olc;
740 app_cert_key_pair_t *ckpair;
742 long flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_COMPRESSION;
743 openssl_main_t *om = &openssl_main;
745 ckpair = app_cert_key_pair_get_if_valid (lctx->ckpair_index);
749 if (!ckpair->cert || !ckpair->key)
751 TLS_DBG (1, "tls cert and/or key not configured %d",
752 lctx->parent_app_wrk_index);
756 method = lctx->tls_type == TRANSPORT_PROTO_TLS ? SSLv23_server_method () :
757 DTLS_server_method ();
758 ssl_ctx = SSL_CTX_new (method);
761 clib_warning ("Unable to create SSL context");
765 SSL_CTX_set_mode (ssl_ctx, SSL_MODE_ENABLE_PARTIAL_WRITE);
766 #ifdef HAVE_OPENSSL_ASYNC
769 SSL_CTX_set_mode (ssl_ctx, SSL_MODE_ASYNC);
770 SSL_CTX_set_async_callback (ssl_ctx, tls_async_openssl_callback);
773 SSL_CTX_set_options (ssl_ctx, flags);
774 SSL_CTX_set_ecdh_auto (ssl_ctx, 1);
776 rv = SSL_CTX_set_cipher_list (ssl_ctx, (const char *) om->ciphers);
779 TLS_DBG (1, "Couldn't set cipher");
783 /* use the default OpenSSL built-in DH parameters */
784 rv = SSL_CTX_set_dh_auto (ssl_ctx, 1);
787 TLS_DBG (1, "Couldn't set temp DH parameters");
792 * Set the key and cert
794 cert_bio = BIO_new (BIO_s_mem ());
797 clib_warning ("unable to allocate memory");
800 BIO_write (cert_bio, ckpair->cert, vec_len (ckpair->cert));
801 srvcert = PEM_read_bio_X509 (cert_bio, NULL, NULL, NULL);
804 clib_warning ("unable to parse certificate");
807 rv = SSL_CTX_use_certificate (ssl_ctx, srvcert);
810 clib_warning ("unable to use SSL certificate");
816 cert_bio = BIO_new (BIO_s_mem ());
819 clib_warning ("unable to allocate memory");
822 BIO_write (cert_bio, ckpair->key, vec_len (ckpair->key));
823 pkey = PEM_read_bio_PrivateKey (cert_bio, NULL, NULL, NULL);
826 clib_warning ("unable to parse pkey");
829 rv = SSL_CTX_use_PrivateKey (ssl_ctx, pkey);
832 clib_warning ("unable to use SSL PrivateKey");
838 olc_index = openssl_listen_ctx_alloc ();
839 olc = openssl_lctx_get (olc_index);
840 olc->ssl_ctx = ssl_ctx;
841 olc->srvcert = srvcert;
844 /* store SSL_CTX into TLS level structure */
845 lctx->tls_ssl_ctx = olc_index;
856 openssl_stop_listen (tls_ctx_t * lctx)
859 openssl_listen_ctx_t *olc;
861 olc_index = lctx->tls_ssl_ctx;
862 olc = openssl_lctx_get (olc_index);
864 X509_free (olc->srvcert);
865 EVP_PKEY_free (olc->pkey);
867 SSL_CTX_free (olc->ssl_ctx);
868 openssl_listen_ctx_free (olc);
874 openssl_ctx_init_server (tls_ctx_t * ctx)
876 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
877 u32 olc_index = ctx->tls_ssl_ctx;
878 openssl_listen_ctx_t *olc;
881 /* Start a new connection */
883 olc = openssl_lctx_get (olc_index);
884 oc->ssl = SSL_new (olc->ssl_ctx);
887 TLS_DBG (1, "Couldn't initialize ssl struct");
891 if (ctx->tls_type == TRANSPORT_PROTO_TLS)
893 oc->rbio = BIO_new_tls (ctx->tls_session_handle);
894 oc->wbio = BIO_new_tls (ctx->tls_session_handle);
898 oc->rbio = BIO_new_dtls (ctx->tls_session_handle);
899 oc->wbio = BIO_new_dtls (ctx->tls_session_handle);
902 SSL_set_bio (oc->ssl, oc->wbio, oc->rbio);
903 SSL_set_accept_state (oc->ssl);
905 TLS_DBG (1, "Initiating handshake for [%u]%u", ctx->c_thread_index,
906 oc->openssl_ctx_index);
908 #ifdef HAVE_OPENSSL_ASYNC
909 session_t *tls_session = session_get_from_handle (ctx->tls_session_handle);
910 vpp_tls_async_init_event (ctx, openssl_ctx_handshake_rx, tls_session);
914 rv = SSL_do_handshake (oc->ssl);
915 err = SSL_get_error (oc->ssl, rv);
916 #ifdef HAVE_OPENSSL_ASYNC
917 if (err == SSL_ERROR_WANT_ASYNC)
919 openssl_check_async_status (ctx, openssl_ctx_handshake_rx,
924 if (err != SSL_ERROR_WANT_WRITE)
928 TLS_DBG (2, "tls state for [%u]%u is su", ctx->c_thread_index,
929 oc->openssl_ctx_index, SSL_state_string_long (oc->ssl));
934 openssl_handshake_is_over (tls_ctx_t * ctx)
936 openssl_ctx_t *mc = (openssl_ctx_t *) ctx;
939 return SSL_is_init_finished (mc->ssl);
943 openssl_transport_close (tls_ctx_t * ctx)
945 #ifdef HAVE_OPENSSL_ASYNC
946 if (vpp_openssl_is_inflight (ctx))
950 if (!openssl_handshake_is_over (ctx))
952 openssl_handle_handshake_failure (ctx);
955 session_transport_closing_notify (&ctx->connection);
960 openssl_app_close (tls_ctx_t * ctx)
962 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
963 session_t *app_session;
965 /* Wait for all data to be written to tcp */
966 app_session = session_get_from_handle (ctx->app_session_handle);
967 if (BIO_ctrl_pending (oc->rbio) <= 0
968 && !svm_fifo_max_dequeue_cons (app_session->tx_fifo))
969 openssl_confirm_app_close (ctx);
975 const static tls_engine_vft_t openssl_engine = {
976 .ctx_alloc = openssl_ctx_alloc,
977 .ctx_alloc_w_thread = openssl_ctx_alloc_w_thread,
978 .ctx_free = openssl_ctx_free,
979 .ctx_attach = openssl_ctx_attach,
980 .ctx_detach = openssl_ctx_detach,
981 .ctx_get = openssl_ctx_get,
982 .ctx_get_w_thread = openssl_ctx_get_w_thread,
983 .ctx_init_server = openssl_ctx_init_server,
984 .ctx_init_client = openssl_ctx_init_client,
985 .ctx_write = openssl_ctx_write,
986 .ctx_read = openssl_ctx_read,
987 .ctx_handshake_is_over = openssl_handshake_is_over,
988 .ctx_start_listen = openssl_start_listen,
989 .ctx_stop_listen = openssl_stop_listen,
990 .ctx_transport_close = openssl_transport_close,
991 .ctx_app_close = openssl_app_close,
995 tls_init_ca_chain (void)
997 openssl_main_t *om = &openssl_main;
998 tls_main_t *tm = vnet_tls_get_main ();
1003 if (access (tm->ca_cert_path, F_OK | R_OK) == -1)
1005 clib_warning ("Could not initialize TLS CA certificates");
1009 if (!(om->cert_store = X509_STORE_new ()))
1011 clib_warning ("failed to create cert store");
1015 #if OPENSSL_VERSION_NUMBER >= 0x30000000L
1016 rv = X509_STORE_load_file (om->cert_store, tm->ca_cert_path);
1018 rv = X509_STORE_load_locations (om->cert_store, tm->ca_cert_path, 0);
1023 clib_warning ("failed to load ca certificate");
1026 if (tm->use_test_cert_in_ca)
1028 cert_bio = BIO_new (BIO_s_mem ());
1029 BIO_write (cert_bio, test_srv_crt_rsa, test_srv_crt_rsa_len);
1030 testcert = PEM_read_bio_X509 (cert_bio, NULL, NULL, NULL);
1033 clib_warning ("unable to parse certificate");
1036 X509_STORE_add_cert (om->cert_store, testcert);
1039 return (rv < 0 ? -1 : 0);
1043 tls_openssl_set_ciphers (char *ciphers)
1045 openssl_main_t *om = &openssl_main;
1053 vec_validate (om->ciphers, strlen (ciphers) - 1);
1054 for (i = 0; i < vec_len (om->ciphers); i++)
1056 om->ciphers[i] = toupper (ciphers[i]);
1063 static clib_error_t *
1064 tls_openssl_init (vlib_main_t * vm)
1066 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1067 openssl_main_t *om = &openssl_main;
1068 clib_error_t *error = 0;
1071 error = tls_openssl_api_init (vm);
1072 num_threads = 1 /* main thread */ + vtm->n_threads;
1074 SSL_library_init ();
1075 SSL_load_error_strings ();
1077 if (tls_init_ca_chain ())
1079 clib_warning ("failed to initialize TLS CA chain");
1083 vec_validate (om->ctx_pool, num_threads - 1);
1084 vec_validate (om->rx_bufs, num_threads - 1);
1085 vec_validate (om->tx_bufs, num_threads - 1);
1086 for (i = 0; i < num_threads; i++)
1088 vec_validate (om->rx_bufs[i], DTLSO_MAX_DGRAM);
1089 vec_validate (om->tx_bufs[i], DTLSO_MAX_DGRAM);
1091 tls_register_engine (&openssl_engine, CRYPTO_ENGINE_OPENSSL);
1093 om->engine_init = 0;
1095 /* default ciphers */
1096 tls_openssl_set_ciphers
1097 ("ALL:!ADH:!LOW:!EXP:!MD5:!RC4-SHA:!DES-CBC3-SHA:@STRENGTH");
1102 VLIB_INIT_FUNCTION (tls_openssl_init) =
1104 .runs_after = VLIB_INITS("tls_init"),
1108 #ifdef HAVE_OPENSSL_ASYNC
1109 static clib_error_t *
1110 tls_openssl_set_command_fn (vlib_main_t * vm, unformat_input_t * input,
1111 vlib_cli_command_t * cmd)
1113 openssl_main_t *om = &openssl_main;
1114 char *engine_name = NULL;
1115 char *engine_alg = NULL;
1116 char *ciphers = NULL;
1117 u8 engine_name_set = 0;
1120 /* By present, it is not allowed to configure engine again after running */
1121 if (om->engine_init)
1123 clib_warning ("engine has started!\n");
1124 return clib_error_return
1125 (0, "engine has started, and no config is accepted");
1128 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1130 if (unformat (input, "engine %s", &engine_name))
1132 engine_name_set = 1;
1134 else if (unformat (input, "async"))
1138 else if (unformat (input, "alg %s", &engine_alg))
1140 for (i = 0; i < strnlen (engine_alg, MAX_CRYPTO_LEN); i++)
1141 engine_alg[i] = toupper (engine_alg[i]);
1143 else if (unformat (input, "ciphers %s", &ciphers))
1145 tls_openssl_set_ciphers (ciphers);
1148 return clib_error_return (0, "failed: unknown input `%U'",
1149 format_unformat_error, input);
1152 /* reset parameters if engine is not configured */
1153 if (!engine_name_set)
1155 clib_warning ("No engine provided! \n");
1160 vnet_session_enable_disable (vm, 1);
1161 if (openssl_engine_register (engine_name, engine_alg, async) < 0)
1163 return clib_error_return (0, "Failed to register %s polling",
1168 vlib_cli_output (vm, "Successfully register engine %s\n",
1178 VLIB_CLI_COMMAND (tls_openssl_set_command, static) =
1180 .path = "tls openssl set",
1181 .short_help = "tls openssl set [engine <engine name>] [alg [algorithm] [async]",
1182 .function = tls_openssl_set_command_fn,
1188 VLIB_PLUGIN_REGISTER () = {
1189 .version = VPP_BUILD_VER,
1190 .description = "Transport Layer Security (TLS) Engine, OpenSSL Based",
1195 * fd.io coding-style-patch-verification: ON
1198 * eval: (c-set-style "gnu")