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>
19 #ifdef HAVE_OPENSSL_ASYNC
20 #include <openssl/async.h>
23 #include <vnet/plugin/plugin.h>
24 #include <vpp/app/version.h>
25 #include <vnet/tls/tls.h>
27 #include <tlsopenssl/tls_openssl.h>
29 #define MAX_CRYPTO_LEN 16
31 static openssl_main_t openssl_main;
33 openssl_ctx_alloc (void)
35 u8 thread_index = vlib_get_thread_index ();
36 openssl_main_t *tm = &openssl_main;
39 pool_get (tm->ctx_pool[thread_index], ctx);
41 *ctx = clib_mem_alloc (sizeof (openssl_ctx_t));
43 clib_memset (*ctx, 0, sizeof (openssl_ctx_t));
44 (*ctx)->ctx.c_thread_index = thread_index;
45 (*ctx)->ctx.tls_ctx_engine = TLS_ENGINE_OPENSSL;
46 (*ctx)->ctx.app_session_handle = SESSION_INVALID_HANDLE;
47 (*ctx)->openssl_ctx_index = ctx - tm->ctx_pool[thread_index];
48 return ((*ctx)->openssl_ctx_index);
52 openssl_ctx_free (tls_ctx_t * ctx)
54 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
56 if (SSL_is_init_finished (oc->ssl) && !ctx->is_passive_close)
57 SSL_shutdown (oc->ssl);
61 pool_put_index (openssl_main.ctx_pool[ctx->c_thread_index],
62 oc->openssl_ctx_index);
66 openssl_ctx_get (u32 ctx_index)
69 ctx = pool_elt_at_index (openssl_main.ctx_pool[vlib_get_thread_index ()],
75 openssl_ctx_get_w_thread (u32 ctx_index, u8 thread_index)
78 ctx = pool_elt_at_index (openssl_main.ctx_pool[thread_index], ctx_index);
83 openssl_listen_ctx_alloc (void)
85 openssl_main_t *om = &openssl_main;
86 openssl_listen_ctx_t *lctx;
88 pool_get (om->lctx_pool, lctx);
90 clib_memset (lctx, 0, sizeof (openssl_listen_ctx_t));
91 lctx->openssl_lctx_index = lctx - om->lctx_pool;
92 return lctx->openssl_lctx_index;
96 openssl_listen_ctx_free (openssl_listen_ctx_t * lctx)
98 pool_put_index (openssl_main.lctx_pool, lctx->openssl_lctx_index);
101 openssl_listen_ctx_t *
102 openssl_lctx_get (u32 lctx_index)
104 return pool_elt_at_index (openssl_main.lctx_pool, lctx_index);
108 openssl_try_handshake_read (openssl_ctx_t * oc,
109 stream_session_t * tls_session)
111 u32 deq_max, deq_now;
115 f = tls_session->server_rx_fifo;
116 deq_max = svm_fifo_max_dequeue (f);
120 deq_now = clib_min (svm_fifo_max_read_chunk (f), deq_max);
121 wrote = BIO_write (oc->wbio, svm_fifo_head (f), deq_now);
125 svm_fifo_dequeue_drop (f, wrote);
128 deq_now = clib_min (svm_fifo_max_read_chunk (f), deq_max - wrote);
129 rv = BIO_write (oc->wbio, svm_fifo_head (f), deq_now);
132 svm_fifo_dequeue_drop (f, rv);
140 openssl_try_handshake_write (openssl_ctx_t * oc,
141 stream_session_t * tls_session)
143 u32 enq_max, deq_now;
147 if (BIO_ctrl_pending (oc->rbio) <= 0)
150 f = tls_session->server_tx_fifo;
151 enq_max = svm_fifo_max_enqueue (f);
155 deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max);
156 read = BIO_read (oc->rbio, svm_fifo_tail (f), deq_now);
160 svm_fifo_enqueue_nocopy (f, read);
161 tls_add_vpp_q_tx_evt (tls_session);
165 deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max - read);
166 rv = BIO_read (oc->rbio, svm_fifo_tail (f), deq_now);
169 svm_fifo_enqueue_nocopy (f, rv);
177 #ifdef HAVE_OPENSSL_ASYNC
179 vpp_ssl_async_process_event (tls_ctx_t * ctx,
180 openssl_resume_handler * handler)
182 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
183 openssl_tls_callback_t *engine_cb;
185 engine_cb = vpp_add_async_pending_event (ctx, handler);
188 SSL_set_async_callback_arg (oc->ssl, (void *) engine_cb->arg);
189 TLS_DBG (2, "set callback to engine %p\n", engine_cb->callback);
195 /* Due to engine busy stat, VPP need to retry later */
197 vpp_ssl_async_retry_func (tls_ctx_t * ctx, openssl_resume_handler * handler)
199 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
201 if (vpp_add_async_run_event (ctx, handler))
203 SSL_clear_async_status (oc->ssl);
212 openssl_ctx_handshake_rx (tls_ctx_t * ctx, stream_session_t * tls_session)
214 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
216 #ifdef HAVE_OPENSSL_ASYNC
218 openssl_resume_handler *myself;
221 while (SSL_in_init (oc->ssl))
227 else if (!openssl_try_handshake_read (oc, tls_session))
232 #ifdef HAVE_OPENSSL_ASYNC
233 myself = openssl_ctx_handshake_rx;
234 vpp_ssl_async_process_event (ctx, myself);
237 rv = SSL_do_handshake (oc->ssl);
238 err = SSL_get_error (oc->ssl, rv);
239 openssl_try_handshake_write (oc, tls_session);
240 #ifdef HAVE_OPENSSL_ASYNC
241 if (err == SSL_ERROR_WANT_ASYNC)
243 SSL_get_async_status (oc->ssl, &estatus);
245 if (estatus == ASYNC_STATUS_EAGAIN)
247 vpp_ssl_async_retry_func (ctx, myself);
252 if (err != SSL_ERROR_WANT_WRITE)
254 if (err == SSL_ERROR_SSL)
257 ERR_error_string (ERR_get_error (), buf);
258 clib_warning ("Err: %s", buf);
263 TLS_DBG (2, "tls state for %u is %s", oc->openssl_ctx_index,
264 SSL_state_string_long (oc->ssl));
266 if (SSL_in_init (oc->ssl))
272 if (!SSL_is_server (oc->ssl))
275 * Verify server certificate
277 if ((rv = SSL_get_verify_result (oc->ssl)) != X509_V_OK)
279 TLS_DBG (1, " failed verify: %s\n",
280 X509_verify_cert_error_string (rv));
283 * Presence of hostname enforces strict certificate verification
285 if (ctx->srv_hostname)
287 tls_notify_app_connected (ctx, /* is failed */ 0);
291 tls_notify_app_connected (ctx, /* is failed */ 0);
295 tls_notify_app_accept (ctx);
298 TLS_DBG (1, "Handshake for %u complete. TLS cipher is %s",
299 oc->openssl_ctx_index, SSL_get_cipher (oc->ssl));
304 openssl_ctx_write (tls_ctx_t * ctx, stream_session_t * app_session)
306 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
307 int wrote = 0, rv, read, max_buf = 100 * TLS_CHUNK_SIZE, max_space;
308 u32 enq_max, deq_max, deq_now, to_write;
309 stream_session_t *tls_session;
312 f = app_session->server_tx_fifo;
313 deq_max = svm_fifo_max_dequeue (f);
317 max_space = max_buf - BIO_ctrl_pending (oc->rbio);
318 max_space = (max_space < 0) ? 0 : max_space;
319 deq_now = clib_min (deq_max, (u32) max_space);
320 to_write = clib_min (svm_fifo_max_read_chunk (f), deq_now);
321 wrote = SSL_write (oc->ssl, svm_fifo_head (f), to_write);
324 tls_add_vpp_q_builtin_tx_evt (app_session);
327 svm_fifo_dequeue_drop (app_session->server_tx_fifo, wrote);
330 to_write = clib_min (svm_fifo_max_read_chunk (f), deq_now - wrote);
331 rv = SSL_write (oc->ssl, svm_fifo_head (f), to_write);
334 svm_fifo_dequeue_drop (app_session->server_tx_fifo, rv);
340 tls_add_vpp_q_builtin_tx_evt (app_session);
344 if (BIO_ctrl_pending (oc->rbio) <= 0)
347 tls_session = session_get_from_handle (ctx->tls_session_handle);
348 f = tls_session->server_tx_fifo;
349 enq_max = svm_fifo_max_enqueue (f);
352 tls_add_vpp_q_builtin_tx_evt (app_session);
356 deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max);
357 read = BIO_read (oc->rbio, svm_fifo_tail (f), deq_now);
360 tls_add_vpp_q_builtin_tx_evt (app_session);
364 svm_fifo_enqueue_nocopy (f, read);
365 tls_add_vpp_q_tx_evt (tls_session);
367 if (read < enq_max && BIO_ctrl_pending (oc->rbio) > 0)
369 deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max - read);
370 read = BIO_read (oc->rbio, svm_fifo_tail (f), deq_now);
372 svm_fifo_enqueue_nocopy (f, read);
375 if (BIO_ctrl_pending (oc->rbio) > 0)
376 tls_add_vpp_q_builtin_tx_evt (app_session);
382 openssl_ctx_read (tls_ctx_t * ctx, stream_session_t * tls_session)
384 int read, wrote = 0, max_space, max_buf = 100 * TLS_CHUNK_SIZE, rv;
385 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
386 u32 deq_max, enq_max, deq_now, to_read;
387 stream_session_t *app_session;
390 if (PREDICT_FALSE (SSL_in_init (oc->ssl)))
392 openssl_ctx_handshake_rx (ctx, tls_session);
396 f = tls_session->server_rx_fifo;
397 deq_max = svm_fifo_max_dequeue (f);
398 max_space = max_buf - BIO_ctrl_pending (oc->wbio);
399 max_space = max_space < 0 ? 0 : max_space;
400 deq_now = clib_min (deq_max, max_space);
404 to_read = clib_min (svm_fifo_max_read_chunk (f), deq_now);
405 wrote = BIO_write (oc->wbio, svm_fifo_head (f), to_read);
408 tls_add_vpp_q_builtin_rx_evt (tls_session);
411 svm_fifo_dequeue_drop (f, wrote);
414 to_read = clib_min (svm_fifo_max_read_chunk (f), deq_now - wrote);
415 rv = BIO_write (oc->wbio, svm_fifo_head (f), to_read);
418 svm_fifo_dequeue_drop (f, rv);
422 if (svm_fifo_max_dequeue (f))
423 tls_add_vpp_q_builtin_rx_evt (tls_session);
427 if (BIO_ctrl_pending (oc->wbio) <= 0)
430 app_session = session_get_from_handle (ctx->app_session_handle);
431 f = app_session->server_rx_fifo;
432 enq_max = svm_fifo_max_enqueue (f);
435 tls_add_vpp_q_builtin_rx_evt (tls_session);
439 deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max);
440 read = SSL_read (oc->ssl, svm_fifo_tail (f), deq_now);
443 tls_add_vpp_q_builtin_rx_evt (tls_session);
446 svm_fifo_enqueue_nocopy (f, read);
447 if (read < enq_max && BIO_ctrl_pending (oc->wbio) > 0)
449 deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max - read);
450 read = SSL_read (oc->ssl, svm_fifo_tail (f), deq_now);
452 svm_fifo_enqueue_nocopy (f, read);
455 tls_notify_app_enqueue (ctx, app_session);
456 if (BIO_ctrl_pending (oc->wbio) > 0)
457 tls_add_vpp_q_builtin_rx_evt (tls_session);
463 openssl_ctx_init_client (tls_ctx_t * ctx)
465 long flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_COMPRESSION;
466 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
467 openssl_main_t *om = &openssl_main;
468 stream_session_t *tls_session;
469 const SSL_METHOD *method;
471 #ifdef HAVE_OPENSSL_ASYNC
472 openssl_resume_handler *handler;
475 method = SSLv23_client_method ();
478 TLS_DBG (1, "SSLv23_method returned null");
482 oc->ssl_ctx = SSL_CTX_new (method);
483 if (oc->ssl_ctx == NULL)
485 TLS_DBG (1, "SSL_CTX_new returned null");
489 SSL_CTX_set_ecdh_auto (oc->ssl_ctx, 1);
490 SSL_CTX_set_mode (oc->ssl_ctx, SSL_MODE_ENABLE_PARTIAL_WRITE);
491 #ifdef HAVE_OPENSSL_ASYNC
493 SSL_CTX_set_mode (oc->ssl_ctx, SSL_MODE_ASYNC);
495 rv = SSL_CTX_set_cipher_list (oc->ssl_ctx, (const char *) om->ciphers);
498 TLS_DBG (1, "Couldn't set cipher");
502 SSL_CTX_set_options (oc->ssl_ctx, flags);
503 SSL_CTX_set_cert_store (oc->ssl_ctx, om->cert_store);
505 oc->ssl = SSL_new (oc->ssl_ctx);
508 TLS_DBG (1, "Couldn't initialize ssl struct");
512 oc->rbio = BIO_new (BIO_s_mem ());
513 oc->wbio = BIO_new (BIO_s_mem ());
515 BIO_set_mem_eof_return (oc->rbio, -1);
516 BIO_set_mem_eof_return (oc->wbio, -1);
518 SSL_set_bio (oc->ssl, oc->wbio, oc->rbio);
519 SSL_set_connect_state (oc->ssl);
521 rv = SSL_set_tlsext_host_name (oc->ssl, ctx->srv_hostname);
524 TLS_DBG (1, "Couldn't set hostname");
529 * 2. Do the first steps in the handshake.
531 TLS_DBG (1, "Initiating handshake for [%u]%u", ctx->c_thread_index,
532 oc->openssl_ctx_index);
534 tls_session = session_get_from_handle (ctx->tls_session_handle);
537 rv = SSL_do_handshake (oc->ssl);
538 err = SSL_get_error (oc->ssl, rv);
539 openssl_try_handshake_write (oc, tls_session);
540 #ifdef HAVE_OPENSSL_ASYNC
541 if (err == SSL_ERROR_WANT_ASYNC)
543 handler = (openssl_resume_handler *) openssl_ctx_handshake_rx;
544 vpp_ssl_async_process_event (ctx, handler);
548 if (err != SSL_ERROR_WANT_WRITE)
552 TLS_DBG (2, "tls state for [%u]%u is su", ctx->c_thread_index,
553 oc->openssl_ctx_index, SSL_state_string_long (oc->ssl));
558 openssl_start_listen (tls_ctx_t * lctx)
561 const SSL_METHOD *method;
568 openssl_listen_ctx_t *olc;
570 long flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_COMPRESSION;
571 openssl_main_t *om = &openssl_main;
573 app = application_get (lctx->parent_app_index);
574 if (!app->tls_cert || !app->tls_key)
576 TLS_DBG (1, "tls cert and/or key not configured %d",
577 lctx->parent_app_index);
581 method = SSLv23_method ();
582 ssl_ctx = SSL_CTX_new (method);
585 clib_warning ("Unable to create SSL context");
589 SSL_CTX_set_mode (ssl_ctx, SSL_MODE_ENABLE_PARTIAL_WRITE);
590 #ifdef HAVE_OPENSSL_ASYNC
592 SSL_CTX_set_mode (ssl_ctx, SSL_MODE_ASYNC);
593 SSL_CTX_set_async_callback (ssl_ctx, tls_async_openssl_callback);
595 SSL_CTX_set_options (ssl_ctx, flags);
596 SSL_CTX_set_ecdh_auto (ssl_ctx, 1);
598 rv = SSL_CTX_set_cipher_list (ssl_ctx, (const char *) om->ciphers);
601 TLS_DBG (1, "Couldn't set cipher");
606 * Set the key and cert
608 cert_bio = BIO_new (BIO_s_mem ());
609 BIO_write (cert_bio, app->tls_cert, vec_len (app->tls_cert));
610 srvcert = PEM_read_bio_X509 (cert_bio, NULL, NULL, NULL);
613 clib_warning ("unable to parse certificate");
616 SSL_CTX_use_certificate (ssl_ctx, srvcert);
619 cert_bio = BIO_new (BIO_s_mem ());
620 BIO_write (cert_bio, app->tls_key, vec_len (app->tls_key));
621 pkey = PEM_read_bio_PrivateKey (cert_bio, NULL, NULL, NULL);
624 clib_warning ("unable to parse pkey");
627 SSL_CTX_use_PrivateKey (ssl_ctx, pkey);
630 olc_index = openssl_listen_ctx_alloc ();
631 olc = openssl_lctx_get (olc_index);
632 olc->ssl_ctx = ssl_ctx;
633 olc->srvcert = srvcert;
636 /* store SSL_CTX into TLS level structure */
637 lctx->tls_ssl_ctx = olc_index;
644 openssl_stop_listen (tls_ctx_t * lctx)
647 openssl_listen_ctx_t *olc;
649 olc_index = lctx->tls_ssl_ctx;
650 olc = openssl_lctx_get (olc_index);
652 X509_free (olc->srvcert);
653 EVP_PKEY_free (olc->pkey);
655 SSL_CTX_free (olc->ssl_ctx);
656 openssl_listen_ctx_free (olc);
662 openssl_ctx_init_server (tls_ctx_t * ctx)
664 openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
665 u32 olc_index = ctx->tls_ssl_ctx;
666 openssl_listen_ctx_t *olc;
667 stream_session_t *tls_session;
669 #ifdef HAVE_OPENSSL_ASYNC
670 openssl_resume_handler *handler;
673 /* Start a new connection */
675 olc = openssl_lctx_get (olc_index);
676 oc->ssl = SSL_new (olc->ssl_ctx);
679 TLS_DBG (1, "Couldn't initialize ssl struct");
683 oc->rbio = BIO_new (BIO_s_mem ());
684 oc->wbio = BIO_new (BIO_s_mem ());
686 BIO_set_mem_eof_return (oc->rbio, -1);
687 BIO_set_mem_eof_return (oc->wbio, -1);
689 SSL_set_bio (oc->ssl, oc->wbio, oc->rbio);
690 SSL_set_accept_state (oc->ssl);
692 TLS_DBG (1, "Initiating handshake for [%u]%u", ctx->c_thread_index,
693 oc->openssl_ctx_index);
695 tls_session = session_get_from_handle (ctx->tls_session_handle);
698 rv = SSL_do_handshake (oc->ssl);
699 err = SSL_get_error (oc->ssl, rv);
700 openssl_try_handshake_write (oc, tls_session);
701 #ifdef HAVE_OPENSSL_ASYNC
702 if (err == SSL_ERROR_WANT_ASYNC)
704 handler = (openssl_resume_handler *) openssl_ctx_handshake_rx;
705 vpp_ssl_async_process_event (ctx, handler);
709 if (err != SSL_ERROR_WANT_WRITE)
713 TLS_DBG (2, "tls state for [%u]%u is su", ctx->c_thread_index,
714 oc->openssl_ctx_index, SSL_state_string_long (oc->ssl));
719 openssl_handshake_is_over (tls_ctx_t * ctx)
721 openssl_ctx_t *mc = (openssl_ctx_t *) ctx;
724 return SSL_is_init_finished (mc->ssl);
727 const static tls_engine_vft_t openssl_engine = {
728 .ctx_alloc = openssl_ctx_alloc,
729 .ctx_free = openssl_ctx_free,
730 .ctx_get = openssl_ctx_get,
731 .ctx_get_w_thread = openssl_ctx_get_w_thread,
732 .ctx_init_server = openssl_ctx_init_server,
733 .ctx_init_client = openssl_ctx_init_client,
734 .ctx_write = openssl_ctx_write,
735 .ctx_read = openssl_ctx_read,
736 .ctx_handshake_is_over = openssl_handshake_is_over,
737 .ctx_start_listen = openssl_start_listen,
738 .ctx_stop_listen = openssl_stop_listen,
742 tls_init_ca_chain (void)
744 openssl_main_t *om = &openssl_main;
745 tls_main_t *tm = vnet_tls_get_main ();
750 if (access (tm->ca_cert_path, F_OK | R_OK) == -1)
752 clib_warning ("Could not initialize TLS CA certificates");
756 if (!(om->cert_store = X509_STORE_new ()))
758 clib_warning ("failed to create cert store");
762 rv = X509_STORE_load_locations (om->cert_store, tm->ca_cert_path, 0);
765 clib_warning ("failed to load ca certificate");
768 if (tm->use_test_cert_in_ca)
770 cert_bio = BIO_new (BIO_s_mem ());
771 BIO_write (cert_bio, test_srv_crt_rsa, test_srv_crt_rsa_len);
772 testcert = PEM_read_bio_X509 (cert_bio, NULL, NULL, NULL);
775 clib_warning ("unable to parse certificate");
778 X509_STORE_add_cert (om->cert_store, testcert);
781 return (rv < 0 ? -1 : 0);
785 tls_openssl_set_ciphers (char *ciphers)
787 openssl_main_t *om = &openssl_main;
795 vec_validate (om->ciphers, strlen (ciphers) - 1);
796 for (i = 0; i < vec_len (om->ciphers); i++)
798 om->ciphers[i] = toupper (ciphers[i]);
805 static clib_error_t *
806 tls_openssl_init (vlib_main_t * vm)
808 vlib_thread_main_t *vtm = vlib_get_thread_main ();
809 openssl_main_t *om = &openssl_main;
813 num_threads = 1 /* main thread */ + vtm->n_threads;
815 if ((error = vlib_call_init_function (vm, tls_init)))
819 SSL_load_error_strings ();
821 if (tls_init_ca_chain ())
823 clib_warning ("failed to initialize TLS CA chain");
827 vec_validate (om->ctx_pool, num_threads - 1);
829 tls_register_engine (&openssl_engine, TLS_ENGINE_OPENSSL);
833 /* default ciphers */
834 tls_openssl_set_ciphers
835 ("ALL:!ADH:!LOW:!EXP:!MD5:!RC4-SHA:!DES-CBC3-SHA:@STRENGTH");
840 #ifdef HAVE_OPENSSL_ASYNC
841 static clib_error_t *
842 tls_openssl_set_command_fn (vlib_main_t * vm, unformat_input_t * input,
843 vlib_cli_command_t * cmd)
845 openssl_main_t *om = &openssl_main;
846 char *engine_name = NULL;
847 char *engine_alg = NULL;
848 char *ciphers = NULL;
849 u8 engine_name_set = 0;
852 /* By present, it is not allowed to configure engine again after running */
855 clib_warning ("engine has started!\n");
856 return clib_error_return
857 (0, "engine has started, and no config is accepted");
860 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
862 if (unformat (input, "engine %s", &engine_name))
866 else if (unformat (input, "async"))
869 openssl_async_node_enable_disable (1);
871 else if (unformat (input, "alg %s", &engine_alg))
873 for (i = 0; i < strnlen (engine_alg, MAX_CRYPTO_LEN); i++)
874 engine_alg[i] = toupper (engine_alg[i]);
876 else if (unformat (input, "ciphers %s", &ciphers))
878 tls_openssl_set_ciphers (ciphers);
881 return clib_error_return (0, "failed: unknown input `%U'",
882 format_unformat_error, input);
885 /* reset parameters if engine is not configured */
886 if (!engine_name_set)
888 clib_warning ("No engine provided! \n");
893 if (!openssl_engine_register (engine_name, engine_alg))
895 return clib_error_return (0, "failed to register %s polling",
904 VLIB_CLI_COMMAND (tls_openssl_set_command, static) =
906 .path = "tls openssl set",
907 .short_help = "tls openssl set [engine <engine name>] [alg [algorithm] [async]",
908 .function = tls_openssl_set_command_fn,
914 VLIB_INIT_FUNCTION (tls_openssl_init);
917 VLIB_PLUGIN_REGISTER () = {
918 .version = VPP_BUILD_VER,
919 .description = "openssl based TLS Engine",
924 * fd.io coding-style-patch-verification: ON
927 * eval: (c-set-style "gnu")