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);
159 openssl_read_from_ssl_into_fifo (svm_fifo_t * f, SSL * ssl)
161 int read, rv, n_fs, i;
162 const int n_segs = 2;
163 svm_fifo_seg_t fs[n_segs];
166 max_enq = svm_fifo_max_enqueue_prod (f);
170 n_fs = svm_fifo_provision_chunks (f, fs, n_segs, max_enq);
174 /* Return early if we can't read anything */
175 read = SSL_read (ssl, fs[0].data, fs[0].len);
179 for (i = 1; i < n_fs; i++)
181 rv = SSL_read (ssl, fs[i].data, fs[i].len);
182 read += rv > 0 ? rv : 0;
184 if (rv < (int) fs[i].len)
188 svm_fifo_enqueue_nocopy (f, read);
194 openssl_write_from_fifo_into_ssl (svm_fifo_t *f, SSL *ssl, u32 max_len)
196 int wrote = 0, rv, i = 0, len;
198 svm_fifo_seg_t fs[n_segs];
200 len = svm_fifo_segments (f, 0, fs, &n_segs, max_len);
204 while (wrote < len && i < n_segs)
206 rv = SSL_write (ssl, fs[i].data, fs[i].len);
207 wrote += (rv > 0) ? rv : 0;
208 if (rv < (int) fs[i].len)
214 svm_fifo_dequeue_drop (f, wrote);
219 #ifdef HAVE_OPENSSL_ASYNC
221 openssl_check_async_status (tls_ctx_t * ctx, openssl_resume_handler * handler,
224 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
227 SSL_get_async_status (oc->ssl, &estatus);
228 if (estatus == ASYNC_STATUS_EAGAIN)
230 vpp_tls_async_update_event (ctx, 1);
234 vpp_tls_async_update_event (ctx, 0);
244 openssl_handle_handshake_failure (tls_ctx_t * ctx)
246 session_t *app_session;
248 if (SSL_is_server (((openssl_ctx_t *) ctx)->ssl))
251 * Cleanup pre-allocated app session and close transport
254 session_get_if_valid (ctx->c_s_index, ctx->c_thread_index);
257 session_free (app_session);
258 ctx->no_app_session = 1;
259 ctx->c_s_index = SESSION_INVALID_INDEX;
260 tls_disconnect_transport (ctx);
266 * Also handles cleanup of the pre-allocated session
268 tls_notify_app_connected (ctx, SESSION_E_TLS_HANDSHAKE);
269 tls_disconnect_transport (ctx);
274 openssl_ctx_handshake_rx (tls_ctx_t * ctx, session_t * tls_session)
276 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
279 while (SSL_in_init (oc->ssl))
285 else if (!svm_fifo_max_dequeue_cons (tls_session->rx_fifo))
288 rv = SSL_do_handshake (oc->ssl);
289 err = SSL_get_error (oc->ssl, rv);
291 #ifdef HAVE_OPENSSL_ASYNC
292 if (err == SSL_ERROR_WANT_ASYNC)
294 openssl_check_async_status (ctx, openssl_ctx_handshake_rx,
298 if (err == SSL_ERROR_SSL)
301 ERR_error_string (ERR_get_error (), buf);
302 clib_warning ("Err: %s", buf);
304 openssl_handle_handshake_failure (ctx);
308 if (err != SSL_ERROR_WANT_WRITE && err != SSL_ERROR_WANT_READ)
311 TLS_DBG (2, "tls state for %u is %s", oc->openssl_ctx_index,
312 SSL_state_string_long (oc->ssl));
314 if (SSL_in_init (oc->ssl))
320 if (!SSL_is_server (oc->ssl))
323 * Verify server certificate
325 if ((rv = SSL_get_verify_result (oc->ssl)) != X509_V_OK)
327 TLS_DBG (1, " failed verify: %s\n",
328 X509_verify_cert_error_string (rv));
331 * Presence of hostname enforces strict certificate verification
333 if (ctx->srv_hostname)
335 openssl_handle_handshake_failure (ctx);
339 tls_notify_app_connected (ctx, SESSION_E_NONE);
343 /* Need to check transport status */
344 if (ctx->is_passive_close)
346 openssl_handle_handshake_failure (ctx);
350 /* Accept failed, cleanup */
351 if (tls_notify_app_accept (ctx))
353 ctx->c_s_index = SESSION_INVALID_INDEX;
354 tls_disconnect_transport (ctx);
359 TLS_DBG (1, "Handshake for %u complete. TLS cipher is %s",
360 oc->openssl_ctx_index, SSL_get_cipher (oc->ssl));
365 openssl_confirm_app_close (tls_ctx_t * ctx)
367 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
368 SSL_shutdown (oc->ssl);
369 tls_disconnect_transport (ctx);
370 session_transport_closed_notify (&ctx->connection);
374 openssl_ctx_write_tls (tls_ctx_t *ctx, session_t *app_session,
375 transport_send_params_t *sp)
377 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
378 u32 deq_max, space, enq_buf;
383 ts = session_get_from_handle (ctx->tls_session_handle);
384 space = svm_fifo_max_enqueue_prod (ts->tx_fifo);
385 /* Leave a bit of extra space for tls ctrl data, if any needed */
386 space = clib_max ((int) space - TLSO_CTRL_BYTES, 0);
388 f = app_session->tx_fifo;
390 deq_max = svm_fifo_max_dequeue_cons (f);
391 deq_max = clib_min (deq_max, space);
395 deq_max = clib_min (deq_max, sp->max_burst_size);
397 /* Make sure tcp's tx fifo can actually buffer all bytes to be dequeued.
398 * If under memory pressure, tls's fifo segment might not be able to
399 * allocate the chunks needed. This also avoids errors from the underlying
400 * custom bio to the ssl infra which at times can get stuck. */
401 if (svm_fifo_provision_chunks (ts->tx_fifo, 0, 0, deq_max + TLSO_CTRL_BYTES))
404 wrote = openssl_write_from_fifo_into_ssl (f, oc->ssl, deq_max);
408 if (svm_fifo_needs_deq_ntf (f, wrote))
409 session_dequeue_notify (app_session);
413 if (PREDICT_FALSE (ctx->app_closed && BIO_ctrl_pending (oc->rbio) <= 0))
414 openssl_confirm_app_close (ctx);
416 /* Deschedule and wait for deq notification if fifo is almost full */
417 enq_buf = clib_min (svm_fifo_size (ts->tx_fifo) / 2, TLSO_MIN_ENQ_SPACE);
418 if (space < wrote + enq_buf)
420 svm_fifo_add_want_deq_ntf (ts->tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
421 transport_connection_deschedule (&ctx->connection);
422 sp->flags |= TRANSPORT_SND_F_DESCHED;
425 /* Request tx reschedule of the app session */
426 app_session->flags |= SESSION_F_CUSTOM_TX;
432 openssl_ctx_write_dtls (tls_ctx_t *ctx, session_t *app_session,
433 transport_send_params_t *sp)
435 openssl_main_t *om = &openssl_main;
436 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
437 u32 read = 0, to_deq, dgram_sz, enq_max;
438 session_dgram_pre_hdr_t hdr;
443 us = session_get_from_handle (ctx->tls_session_handle);
444 to_deq = svm_fifo_max_dequeue_cons (app_session->tx_fifo);
445 buf = om->tx_bufs[ctx->c_thread_index];
449 /* Peeking only pre-header dgram because the session is connected */
450 rv = svm_fifo_peek (app_session->tx_fifo, 0, sizeof (hdr), (u8 *) &hdr);
451 ASSERT (rv == sizeof (hdr) && hdr.data_length < vec_len (buf));
452 ASSERT (to_deq >= hdr.data_length + SESSION_CONN_HDR_LEN);
454 dgram_sz = hdr.data_length + SESSION_CONN_HDR_LEN;
455 enq_max = dgram_sz + TLSO_CTRL_BYTES;
456 if (svm_fifo_max_enqueue_prod (us->tx_fifo) < enq_max ||
457 svm_fifo_provision_chunks (us->tx_fifo, 0, 0, enq_max))
459 svm_fifo_add_want_deq_ntf (us->tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
460 transport_connection_deschedule (&ctx->connection);
461 sp->flags |= TRANSPORT_SND_F_DESCHED;
465 rv = svm_fifo_peek (app_session->tx_fifo, SESSION_CONN_HDR_LEN,
466 hdr.data_length, buf);
467 ASSERT (rv == hdr.data_length);
468 svm_fifo_dequeue_drop (app_session->tx_fifo, dgram_sz);
470 wrote = SSL_write (oc->ssl, buf, rv);
479 if (svm_fifo_needs_deq_ntf (app_session->tx_fifo, read))
480 session_dequeue_notify (app_session);
483 tls_add_vpp_q_tx_evt (us);
485 if (PREDICT_FALSE (ctx->app_closed &&
486 !svm_fifo_max_enqueue_prod (us->rx_fifo)))
487 openssl_confirm_app_close (ctx);
493 openssl_ctx_write (tls_ctx_t *ctx, session_t *app_session,
494 transport_send_params_t *sp)
496 if (ctx->tls_type == TRANSPORT_PROTO_TLS)
497 return openssl_ctx_write_tls (ctx, app_session, sp);
499 return openssl_ctx_write_dtls (ctx, app_session, sp);
503 openssl_ctx_read_tls (tls_ctx_t *ctx, session_t *tls_session)
505 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
506 session_t *app_session;
510 if (PREDICT_FALSE (SSL_in_init (oc->ssl)))
512 if (openssl_ctx_handshake_rx (ctx, tls_session) < 0)
516 app_session = session_get_from_handle (ctx->app_session_handle);
517 f = app_session->rx_fifo;
519 read = openssl_read_from_ssl_into_fifo (f, oc->ssl);
521 /* If handshake just completed, session may still be in accepting state */
522 if (read && app_session->session_state >= SESSION_STATE_READY)
523 tls_notify_app_enqueue (ctx, app_session);
525 if ((SSL_pending (oc->ssl) > 0) ||
526 svm_fifo_max_dequeue_cons (tls_session->rx_fifo))
527 tls_add_vpp_q_builtin_rx_evt (tls_session);
533 openssl_ctx_read_dtls (tls_ctx_t *ctx, session_t *us)
535 openssl_main_t *om = &openssl_main;
536 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
537 session_dgram_hdr_t hdr;
538 session_t *app_session;
543 if (PREDICT_FALSE (SSL_in_init (oc->ssl)))
545 u32 us_index = us->session_index;
546 if (openssl_ctx_handshake_rx (ctx, us) < 0)
548 /* Session pool might grow when allocating the app's session */
549 us = session_get (us_index, ctx->c_thread_index);
552 buf = om->rx_bufs[ctx->c_thread_index];
553 app_session = session_get_from_handle (ctx->app_session_handle);
554 svm_fifo_fill_chunk_list (app_session->rx_fifo);
556 while (svm_fifo_max_dequeue_cons (us->rx_fifo) > 0)
558 if (svm_fifo_max_enqueue_prod (app_session->rx_fifo) < DTLSO_MAX_DGRAM)
560 tls_add_vpp_q_builtin_rx_evt (us);
564 read = SSL_read (oc->ssl, buf, vec_len (buf));
565 if (PREDICT_FALSE (read <= 0))
568 tls_add_vpp_q_builtin_rx_evt (us);
573 hdr.data_length = read;
576 svm_fifo_seg_t segs[2] = { { (u8 *) &hdr, sizeof (hdr) },
579 rv = svm_fifo_enqueue_segments (app_session->rx_fifo, segs, 2,
580 0 /* allow partial */);
586 /* If handshake just completed, session may still be in accepting state */
587 if (app_session->session_state >= SESSION_STATE_READY)
588 tls_notify_app_enqueue (ctx, app_session);
594 openssl_ctx_read (tls_ctx_t *ctx, session_t *ts)
596 if (ctx->tls_type == TRANSPORT_PROTO_TLS)
597 return openssl_ctx_read_tls (ctx, ts);
599 return openssl_ctx_read_dtls (ctx, ts);
603 openssl_ctx_init_client (tls_ctx_t * ctx)
605 long flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_COMPRESSION;
606 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
607 openssl_main_t *om = &openssl_main;
608 const SSL_METHOD *method;
611 method = ctx->tls_type == TRANSPORT_PROTO_TLS ? SSLv23_client_method () :
612 DTLS_client_method ();
615 TLS_DBG (1, "(D)TLS_method returned null");
619 oc->ssl_ctx = SSL_CTX_new (method);
620 if (oc->ssl_ctx == NULL)
622 TLS_DBG (1, "SSL_CTX_new returned null");
626 SSL_CTX_set_ecdh_auto (oc->ssl_ctx, 1);
627 SSL_CTX_set_mode (oc->ssl_ctx, SSL_MODE_ENABLE_PARTIAL_WRITE);
628 #ifdef HAVE_OPENSSL_ASYNC
630 SSL_CTX_set_mode (oc->ssl_ctx, SSL_MODE_ASYNC);
632 rv = SSL_CTX_set_cipher_list (oc->ssl_ctx, (const char *) om->ciphers);
635 TLS_DBG (1, "Couldn't set cipher");
639 SSL_CTX_set_options (oc->ssl_ctx, flags);
640 SSL_CTX_set_cert_store (oc->ssl_ctx, om->cert_store);
642 oc->ssl = SSL_new (oc->ssl_ctx);
645 TLS_DBG (1, "Couldn't initialize ssl struct");
649 if (ctx->tls_type == TRANSPORT_PROTO_TLS)
651 oc->rbio = BIO_new_tls (ctx->tls_session_handle);
652 oc->wbio = BIO_new_tls (ctx->tls_session_handle);
656 oc->rbio = BIO_new_dtls (ctx->tls_session_handle);
657 oc->wbio = BIO_new_dtls (ctx->tls_session_handle);
660 SSL_set_bio (oc->ssl, oc->wbio, oc->rbio);
661 SSL_set_connect_state (oc->ssl);
663 rv = SSL_set_tlsext_host_name (oc->ssl, ctx->srv_hostname);
666 TLS_DBG (1, "Couldn't set hostname");
671 * 2. Do the first steps in the handshake.
673 TLS_DBG (1, "Initiating handshake for [%u]%u", ctx->c_thread_index,
674 oc->openssl_ctx_index);
676 #ifdef HAVE_OPENSSL_ASYNC
677 session_t *tls_session = session_get_from_handle (ctx->tls_session_handle);
678 vpp_tls_async_init_event (ctx, openssl_ctx_handshake_rx, tls_session);
682 rv = SSL_do_handshake (oc->ssl);
683 err = SSL_get_error (oc->ssl, rv);
684 #ifdef HAVE_OPENSSL_ASYNC
685 if (err == SSL_ERROR_WANT_ASYNC)
687 openssl_check_async_status (ctx, openssl_ctx_handshake_rx,
692 if (err != SSL_ERROR_WANT_WRITE)
696 TLS_DBG (2, "tls state for [%u]%u is su", ctx->c_thread_index,
697 oc->openssl_ctx_index, SSL_state_string_long (oc->ssl));
702 openssl_start_listen (tls_ctx_t * lctx)
704 const SSL_METHOD *method;
711 openssl_listen_ctx_t *olc;
712 app_cert_key_pair_t *ckpair;
714 long flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_COMPRESSION;
715 openssl_main_t *om = &openssl_main;
717 ckpair = app_cert_key_pair_get_if_valid (lctx->ckpair_index);
721 if (!ckpair->cert || !ckpair->key)
723 TLS_DBG (1, "tls cert and/or key not configured %d",
724 lctx->parent_app_wrk_index);
728 method = lctx->tls_type == TRANSPORT_PROTO_TLS ? SSLv23_server_method () :
729 DTLS_server_method ();
730 ssl_ctx = SSL_CTX_new (method);
733 clib_warning ("Unable to create SSL context");
737 SSL_CTX_set_mode (ssl_ctx, SSL_MODE_ENABLE_PARTIAL_WRITE);
738 #ifdef HAVE_OPENSSL_ASYNC
741 SSL_CTX_set_mode (ssl_ctx, SSL_MODE_ASYNC);
742 SSL_CTX_set_async_callback (ssl_ctx, tls_async_openssl_callback);
745 SSL_CTX_set_options (ssl_ctx, flags);
746 SSL_CTX_set_ecdh_auto (ssl_ctx, 1);
748 rv = SSL_CTX_set_cipher_list (ssl_ctx, (const char *) om->ciphers);
751 TLS_DBG (1, "Couldn't set cipher");
755 /* use the default OpenSSL built-in DH parameters */
756 rv = SSL_CTX_set_dh_auto (ssl_ctx, 1);
759 TLS_DBG (1, "Couldn't set temp DH parameters");
764 * Set the key and cert
766 cert_bio = BIO_new (BIO_s_mem ());
769 clib_warning ("unable to allocate memory");
772 BIO_write (cert_bio, ckpair->cert, vec_len (ckpair->cert));
773 srvcert = PEM_read_bio_X509 (cert_bio, NULL, NULL, NULL);
776 clib_warning ("unable to parse certificate");
779 rv = SSL_CTX_use_certificate (ssl_ctx, srvcert);
782 clib_warning ("unable to use SSL certificate");
788 cert_bio = BIO_new (BIO_s_mem ());
791 clib_warning ("unable to allocate memory");
794 BIO_write (cert_bio, ckpair->key, vec_len (ckpair->key));
795 pkey = PEM_read_bio_PrivateKey (cert_bio, NULL, NULL, NULL);
798 clib_warning ("unable to parse pkey");
801 rv = SSL_CTX_use_PrivateKey (ssl_ctx, pkey);
804 clib_warning ("unable to use SSL PrivateKey");
810 olc_index = openssl_listen_ctx_alloc ();
811 olc = openssl_lctx_get (olc_index);
812 olc->ssl_ctx = ssl_ctx;
813 olc->srvcert = srvcert;
816 /* store SSL_CTX into TLS level structure */
817 lctx->tls_ssl_ctx = olc_index;
828 openssl_stop_listen (tls_ctx_t * lctx)
831 openssl_listen_ctx_t *olc;
833 olc_index = lctx->tls_ssl_ctx;
834 olc = openssl_lctx_get (olc_index);
836 X509_free (olc->srvcert);
837 EVP_PKEY_free (olc->pkey);
839 SSL_CTX_free (olc->ssl_ctx);
840 openssl_listen_ctx_free (olc);
846 openssl_ctx_init_server (tls_ctx_t * ctx)
848 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
849 u32 olc_index = ctx->tls_ssl_ctx;
850 openssl_listen_ctx_t *olc;
853 /* Start a new connection */
855 olc = openssl_lctx_get (olc_index);
856 oc->ssl = SSL_new (olc->ssl_ctx);
859 TLS_DBG (1, "Couldn't initialize ssl struct");
863 if (ctx->tls_type == TRANSPORT_PROTO_TLS)
865 oc->rbio = BIO_new_tls (ctx->tls_session_handle);
866 oc->wbio = BIO_new_tls (ctx->tls_session_handle);
870 oc->rbio = BIO_new_dtls (ctx->tls_session_handle);
871 oc->wbio = BIO_new_dtls (ctx->tls_session_handle);
874 SSL_set_bio (oc->ssl, oc->wbio, oc->rbio);
875 SSL_set_accept_state (oc->ssl);
877 TLS_DBG (1, "Initiating handshake for [%u]%u", ctx->c_thread_index,
878 oc->openssl_ctx_index);
880 #ifdef HAVE_OPENSSL_ASYNC
881 session_t *tls_session = session_get_from_handle (ctx->tls_session_handle);
882 vpp_tls_async_init_event (ctx, openssl_ctx_handshake_rx, tls_session);
886 rv = SSL_do_handshake (oc->ssl);
887 err = SSL_get_error (oc->ssl, rv);
888 #ifdef HAVE_OPENSSL_ASYNC
889 if (err == SSL_ERROR_WANT_ASYNC)
891 openssl_check_async_status (ctx, openssl_ctx_handshake_rx,
896 if (err != SSL_ERROR_WANT_WRITE)
900 TLS_DBG (2, "tls state for [%u]%u is su", ctx->c_thread_index,
901 oc->openssl_ctx_index, SSL_state_string_long (oc->ssl));
906 openssl_handshake_is_over (tls_ctx_t * ctx)
908 openssl_ctx_t *mc = (openssl_ctx_t *) ctx;
911 return SSL_is_init_finished (mc->ssl);
915 openssl_transport_close (tls_ctx_t * ctx)
917 #ifdef HAVE_OPENSSL_ASYNC
918 if (vpp_openssl_is_inflight (ctx))
922 if (!openssl_handshake_is_over (ctx))
924 openssl_handle_handshake_failure (ctx);
927 session_transport_closing_notify (&ctx->connection);
932 openssl_app_close (tls_ctx_t * ctx)
934 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
935 session_t *app_session;
937 /* Wait for all data to be written to tcp */
938 app_session = session_get_from_handle (ctx->app_session_handle);
939 if (BIO_ctrl_pending (oc->rbio) <= 0
940 && !svm_fifo_max_dequeue_cons (app_session->tx_fifo))
941 openssl_confirm_app_close (ctx);
947 const static tls_engine_vft_t openssl_engine = {
948 .ctx_alloc = openssl_ctx_alloc,
949 .ctx_alloc_w_thread = openssl_ctx_alloc_w_thread,
950 .ctx_free = openssl_ctx_free,
951 .ctx_attach = openssl_ctx_attach,
952 .ctx_detach = openssl_ctx_detach,
953 .ctx_get = openssl_ctx_get,
954 .ctx_get_w_thread = openssl_ctx_get_w_thread,
955 .ctx_init_server = openssl_ctx_init_server,
956 .ctx_init_client = openssl_ctx_init_client,
957 .ctx_write = openssl_ctx_write,
958 .ctx_read = openssl_ctx_read,
959 .ctx_handshake_is_over = openssl_handshake_is_over,
960 .ctx_start_listen = openssl_start_listen,
961 .ctx_stop_listen = openssl_stop_listen,
962 .ctx_transport_close = openssl_transport_close,
963 .ctx_app_close = openssl_app_close,
967 tls_init_ca_chain (void)
969 openssl_main_t *om = &openssl_main;
970 tls_main_t *tm = vnet_tls_get_main ();
975 if (access (tm->ca_cert_path, F_OK | R_OK) == -1)
977 clib_warning ("Could not initialize TLS CA certificates");
981 if (!(om->cert_store = X509_STORE_new ()))
983 clib_warning ("failed to create cert store");
987 #if OPENSSL_VERSION_NUMBER >= 0x30000000L
988 rv = X509_STORE_load_file (om->cert_store, tm->ca_cert_path);
990 rv = X509_STORE_load_locations (om->cert_store, tm->ca_cert_path, 0);
995 clib_warning ("failed to load ca certificate");
998 if (tm->use_test_cert_in_ca)
1000 cert_bio = BIO_new (BIO_s_mem ());
1001 BIO_write (cert_bio, test_srv_crt_rsa, test_srv_crt_rsa_len);
1002 testcert = PEM_read_bio_X509 (cert_bio, NULL, NULL, NULL);
1005 clib_warning ("unable to parse certificate");
1008 X509_STORE_add_cert (om->cert_store, testcert);
1011 return (rv < 0 ? -1 : 0);
1015 tls_openssl_set_ciphers (char *ciphers)
1017 openssl_main_t *om = &openssl_main;
1025 vec_validate (om->ciphers, strlen (ciphers) - 1);
1026 for (i = 0; i < vec_len (om->ciphers); i++)
1028 om->ciphers[i] = toupper (ciphers[i]);
1035 static clib_error_t *
1036 tls_openssl_init (vlib_main_t * vm)
1038 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1039 openssl_main_t *om = &openssl_main;
1040 clib_error_t *error = 0;
1043 error = tls_openssl_api_init (vm);
1044 num_threads = 1 /* main thread */ + vtm->n_threads;
1046 SSL_library_init ();
1047 SSL_load_error_strings ();
1049 if (tls_init_ca_chain ())
1051 clib_warning ("failed to initialize TLS CA chain");
1055 vec_validate (om->ctx_pool, num_threads - 1);
1056 vec_validate (om->rx_bufs, num_threads - 1);
1057 vec_validate (om->tx_bufs, num_threads - 1);
1058 for (i = 0; i < num_threads; i++)
1060 vec_validate (om->rx_bufs[i], DTLSO_MAX_DGRAM);
1061 vec_validate (om->tx_bufs[i], DTLSO_MAX_DGRAM);
1063 tls_register_engine (&openssl_engine, CRYPTO_ENGINE_OPENSSL);
1065 om->engine_init = 0;
1067 /* default ciphers */
1068 tls_openssl_set_ciphers
1069 ("ALL:!ADH:!LOW:!EXP:!MD5:!RC4-SHA:!DES-CBC3-SHA:@STRENGTH");
1074 VLIB_INIT_FUNCTION (tls_openssl_init) =
1076 .runs_after = VLIB_INITS("tls_init"),
1080 #ifdef HAVE_OPENSSL_ASYNC
1081 static clib_error_t *
1082 tls_openssl_set_command_fn (vlib_main_t * vm, unformat_input_t * input,
1083 vlib_cli_command_t * cmd)
1085 openssl_main_t *om = &openssl_main;
1086 char *engine_name = NULL;
1087 char *engine_alg = NULL;
1088 char *ciphers = NULL;
1089 u8 engine_name_set = 0;
1092 /* By present, it is not allowed to configure engine again after running */
1093 if (om->engine_init)
1095 clib_warning ("engine has started!\n");
1096 return clib_error_return
1097 (0, "engine has started, and no config is accepted");
1100 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1102 if (unformat (input, "engine %s", &engine_name))
1104 engine_name_set = 1;
1106 else if (unformat (input, "async"))
1110 else if (unformat (input, "alg %s", &engine_alg))
1112 for (i = 0; i < strnlen (engine_alg, MAX_CRYPTO_LEN); i++)
1113 engine_alg[i] = toupper (engine_alg[i]);
1115 else if (unformat (input, "ciphers %s", &ciphers))
1117 tls_openssl_set_ciphers (ciphers);
1120 return clib_error_return (0, "failed: unknown input `%U'",
1121 format_unformat_error, input);
1124 /* reset parameters if engine is not configured */
1125 if (!engine_name_set)
1127 clib_warning ("No engine provided! \n");
1132 vnet_session_enable_disable (vm, 1);
1133 if (openssl_engine_register (engine_name, engine_alg, async) < 0)
1135 return clib_error_return (0, "Failed to register %s polling",
1140 vlib_cli_output (vm, "Successfully register engine %s\n",
1150 VLIB_CLI_COMMAND (tls_openssl_set_command, static) =
1152 .path = "tls openssl set",
1153 .short_help = "tls openssl set [engine <engine name>] [alg [algorithm] [async]",
1154 .function = tls_openssl_set_command_fn,
1160 VLIB_PLUGIN_REGISTER () = {
1161 .version = VPP_BUILD_VER,
1162 .description = "Transport Layer Security (TLS) Engine, OpenSSL Based",
1167 * fd.io coding-style-patch-verification: ON
1170 * eval: (c-set-style "gnu")