FD.io VPP  v19.04.4-rc0-5-ge88582fac
Vector Packet Processing
tls_openssl.c
Go to the documentation of this file.
1 /*
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:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
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.
14  */
15 
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>
21 #endif
22 #include <dlfcn.h>
23 #include <vnet/plugin/plugin.h>
24 #include <vpp/app/version.h>
25 #include <vnet/tls/tls.h>
26 #include <ctype.h>
27 #include <tlsopenssl/tls_openssl.h>
28 
29 #define MAX_CRYPTO_LEN 16
30 
32 static u32
34 {
35  u8 thread_index = vlib_get_thread_index ();
38 
39  pool_get (tm->ctx_pool[thread_index], ctx);
40  if (!(*ctx))
41  *ctx = clib_mem_alloc (sizeof (openssl_ctx_t));
42 
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);
49 }
50 
51 static void
53 {
54  openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
55 
56  if (SSL_is_init_finished (oc->ssl) && !ctx->is_passive_close)
57  SSL_shutdown (oc->ssl);
58 
59  SSL_free (oc->ssl);
60 
61  pool_put_index (openssl_main.ctx_pool[ctx->c_thread_index],
62  oc->openssl_ctx_index);
63 }
64 
65 tls_ctx_t *
66 openssl_ctx_get (u32 ctx_index)
67 {
69  ctx = pool_elt_at_index (openssl_main.ctx_pool[vlib_get_thread_index ()],
70  ctx_index);
71  return &(*ctx)->ctx;
72 }
73 
74 tls_ctx_t *
75 openssl_ctx_get_w_thread (u32 ctx_index, u8 thread_index)
76 {
78  ctx = pool_elt_at_index (openssl_main.ctx_pool[thread_index], ctx_index);
79  return &(*ctx)->ctx;
80 }
81 
82 static u32
84 {
87 
88  pool_get (om->lctx_pool, lctx);
89 
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;
93 }
94 
95 static void
97 {
98  pool_put_index (openssl_main.lctx_pool, lctx->openssl_lctx_index);
99 }
100 
102 openssl_lctx_get (u32 lctx_index)
103 {
104  return pool_elt_at_index (openssl_main.lctx_pool, lctx_index);
105 }
106 
107 static int
109 {
110  u32 deq_max, deq_now;
111  svm_fifo_t *f;
112  int wrote, rv;
113 
114  f = tls_session->rx_fifo;
115  deq_max = svm_fifo_max_dequeue (f);
116  if (!deq_max)
117  return 0;
118 
119  deq_now = clib_min (svm_fifo_max_read_chunk (f), deq_max);
120  wrote = BIO_write (oc->wbio, svm_fifo_head (f), deq_now);
121  if (wrote <= 0)
122  return 0;
123 
124  svm_fifo_dequeue_drop (f, wrote);
125  if (wrote < deq_max)
126  {
127  deq_now = clib_min (svm_fifo_max_read_chunk (f), deq_max - wrote);
128  rv = BIO_write (oc->wbio, svm_fifo_head (f), deq_now);
129  if (rv > 0)
130  {
131  svm_fifo_dequeue_drop (f, rv);
132  wrote += rv;
133  }
134  }
135  return wrote;
136 }
137 
138 static int
140 {
141  u32 enq_max, deq_now;
142  svm_fifo_t *f;
143  int read, rv;
144 
145  if (BIO_ctrl_pending (oc->rbio) <= 0)
146  return 0;
147 
148  f = tls_session->tx_fifo;
149  enq_max = svm_fifo_max_enqueue (f);
150  if (!enq_max)
151  return 0;
152 
153  deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max);
154  read = BIO_read (oc->rbio, svm_fifo_tail (f), deq_now);
155  if (read <= 0)
156  return 0;
157 
158  svm_fifo_enqueue_nocopy (f, read);
159  tls_add_vpp_q_tx_evt (tls_session);
160 
161  if (read < enq_max)
162  {
163  deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max - read);
164  rv = BIO_read (oc->rbio, svm_fifo_tail (f), deq_now);
165  if (rv > 0)
166  {
167  svm_fifo_enqueue_nocopy (f, rv);
168  read += rv;
169  }
170  }
171 
172  return read;
173 }
174 
175 #ifdef HAVE_OPENSSL_ASYNC
176 static int
177 vpp_ssl_async_process_event (tls_ctx_t * ctx,
178  openssl_resume_handler * handler)
179 {
180  openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
181  openssl_tls_callback_t *engine_cb;
182 
183  engine_cb = vpp_add_async_pending_event (ctx, handler);
184  if (engine_cb)
185  {
186  SSL_set_async_callback_arg (oc->ssl, (void *) engine_cb->arg);
187  TLS_DBG (2, "set callback to engine %p\n", engine_cb->callback);
188  }
189  return 0;
190 
191 }
192 
193 /* Due to engine busy stat, VPP need to retry later */
194 static int
195 vpp_ssl_async_retry_func (tls_ctx_t * ctx, openssl_resume_handler * handler)
196 {
197 
198  if (vpp_add_async_run_event (ctx, handler))
199  return 1;
200 
201  return 0;
202 
203 }
204 
205 #endif
206 
207 int
209 {
210  openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
211  int rv = 0, err;
212 #ifdef HAVE_OPENSSL_ASYNC
213  int estatus;
214  openssl_resume_handler *myself;
215 #endif
216 
217  while (SSL_in_init (oc->ssl))
218  {
219  if (ctx->resume)
220  {
221  ctx->resume = 0;
222  }
223  else if (!openssl_try_handshake_read (oc, tls_session))
224  {
225  break;
226  }
227 
228 #ifdef HAVE_OPENSSL_ASYNC
229  myself = openssl_ctx_handshake_rx;
230  vpp_ssl_async_process_event (ctx, myself);
231 #endif
232 
233  rv = SSL_do_handshake (oc->ssl);
234  err = SSL_get_error (oc->ssl, rv);
235  openssl_try_handshake_write (oc, tls_session);
236 #ifdef HAVE_OPENSSL_ASYNC
237  if (err == SSL_ERROR_WANT_ASYNC)
238  {
239  SSL_get_async_status (oc->ssl, &estatus);
240 
241  if (estatus == ASYNC_STATUS_EAGAIN)
242  {
243  vpp_ssl_async_retry_func (ctx, myself);
244  }
245  }
246 #endif
247 
248  if (err != SSL_ERROR_WANT_WRITE)
249  {
250  if (err == SSL_ERROR_SSL)
251  {
252  char buf[512];
253  ERR_error_string (ERR_get_error (), buf);
254  clib_warning ("Err: %s", buf);
255  }
256  break;
257  }
258  }
259  TLS_DBG (2, "tls state for %u is %s", oc->openssl_ctx_index,
260  SSL_state_string_long (oc->ssl));
261 
262  if (SSL_in_init (oc->ssl))
263  return 0;
264 
265  /*
266  * Handshake complete
267  */
268  if (!SSL_is_server (oc->ssl))
269  {
270  /*
271  * Verify server certificate
272  */
273  if ((rv = SSL_get_verify_result (oc->ssl)) != X509_V_OK)
274  {
275  TLS_DBG (1, " failed verify: %s\n",
276  X509_verify_cert_error_string (rv));
277 
278  /*
279  * Presence of hostname enforces strict certificate verification
280  */
281  if (ctx->srv_hostname)
282  {
283  tls_notify_app_connected (ctx, /* is failed */ 0);
284  return -1;
285  }
286  }
287  tls_notify_app_connected (ctx, /* is failed */ 0);
288  }
289  else
290  {
291  tls_notify_app_accept (ctx);
292  }
293 
294  TLS_DBG (1, "Handshake for %u complete. TLS cipher is %s",
295  oc->openssl_ctx_index, SSL_get_cipher (oc->ssl));
296  return rv;
297 }
298 
299 static inline int
300 openssl_ctx_write (tls_ctx_t * ctx, session_t * app_session)
301 {
302  openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
303  int wrote = 0, rv, read, max_buf = 100 * TLS_CHUNK_SIZE, max_space;
304  u32 enq_max, deq_max, deq_now, to_write;
305  session_t *tls_session;
306  svm_fifo_t *f;
307 
308  f = app_session->tx_fifo;
309  deq_max = svm_fifo_max_dequeue (f);
310  if (!deq_max)
311  goto check_tls_fifo;
312 
313  max_space = max_buf - BIO_ctrl_pending (oc->rbio);
314  max_space = (max_space < 0) ? 0 : max_space;
315  deq_now = clib_min (deq_max, (u32) max_space);
316  to_write = clib_min (svm_fifo_max_read_chunk (f), deq_now);
317  wrote = SSL_write (oc->ssl, svm_fifo_head (f), to_write);
318  if (wrote <= 0)
319  {
320  tls_add_vpp_q_builtin_tx_evt (app_session);
321  goto check_tls_fifo;
322  }
323  svm_fifo_dequeue_drop (app_session->tx_fifo, wrote);
324  if (wrote < deq_now)
325  {
326  to_write = clib_min (svm_fifo_max_read_chunk (f), deq_now - wrote);
327  rv = SSL_write (oc->ssl, svm_fifo_head (f), to_write);
328  if (rv > 0)
329  {
330  svm_fifo_dequeue_drop (app_session->tx_fifo, rv);
331  wrote += rv;
332  }
333  }
334 
335  if (wrote < deq_max)
336  tls_add_vpp_q_builtin_tx_evt (app_session);
337 
338 check_tls_fifo:
339 
340  if (BIO_ctrl_pending (oc->rbio) <= 0)
341  return wrote;
342 
343  tls_session = session_get_from_handle (ctx->tls_session_handle);
344  f = tls_session->tx_fifo;
345  enq_max = svm_fifo_max_enqueue (f);
346  if (!enq_max)
347  {
348  tls_add_vpp_q_builtin_tx_evt (app_session);
349  return wrote;
350  }
351 
352  deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max);
353  read = BIO_read (oc->rbio, svm_fifo_tail (f), deq_now);
354  if (read <= 0)
355  {
356  tls_add_vpp_q_builtin_tx_evt (app_session);
357  return wrote;
358  }
359 
360  svm_fifo_enqueue_nocopy (f, read);
361  tls_add_vpp_q_tx_evt (tls_session);
362 
363  if (read < enq_max && BIO_ctrl_pending (oc->rbio) > 0)
364  {
365  deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max - read);
366  read = BIO_read (oc->rbio, svm_fifo_tail (f), deq_now);
367  if (read > 0)
368  svm_fifo_enqueue_nocopy (f, read);
369  }
370 
371  if (BIO_ctrl_pending (oc->rbio) > 0)
372  tls_add_vpp_q_builtin_tx_evt (app_session);
373 
374  return wrote;
375 }
376 
377 static inline int
378 openssl_ctx_read (tls_ctx_t * ctx, session_t * tls_session)
379 {
380  int read, wrote = 0, max_space, max_buf = 100 * TLS_CHUNK_SIZE, rv;
381  openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
382  u32 deq_max, enq_max, deq_now, to_read;
383  session_t *app_session;
384  svm_fifo_t *f;
385 
386  if (PREDICT_FALSE (SSL_in_init (oc->ssl)))
387  {
388  openssl_ctx_handshake_rx (ctx, tls_session);
389  return 0;
390  }
391 
392  f = tls_session->rx_fifo;
393  deq_max = svm_fifo_max_dequeue (f);
394  max_space = max_buf - BIO_ctrl_pending (oc->wbio);
395  max_space = max_space < 0 ? 0 : max_space;
396  deq_now = clib_min (deq_max, max_space);
397  if (!deq_now)
398  goto check_app_fifo;
399 
400  to_read = clib_min (svm_fifo_max_read_chunk (f), deq_now);
401  wrote = BIO_write (oc->wbio, svm_fifo_head (f), to_read);
402  if (wrote <= 0)
403  {
404  tls_add_vpp_q_builtin_rx_evt (tls_session);
405  goto check_app_fifo;
406  }
407  svm_fifo_dequeue_drop (f, wrote);
408  if (wrote < deq_now)
409  {
410  to_read = clib_min (svm_fifo_max_read_chunk (f), deq_now - wrote);
411  rv = BIO_write (oc->wbio, svm_fifo_head (f), to_read);
412  if (rv > 0)
413  {
414  svm_fifo_dequeue_drop (f, rv);
415  wrote += rv;
416  }
417  }
418  if (svm_fifo_max_dequeue (f))
419  tls_add_vpp_q_builtin_rx_evt (tls_session);
420 
421 check_app_fifo:
422 
423  if (BIO_ctrl_pending (oc->wbio) <= 0)
424  return wrote;
425 
426  app_session = session_get_from_handle (ctx->app_session_handle);
427  f = app_session->rx_fifo;
428  enq_max = svm_fifo_max_enqueue (f);
429  if (!enq_max)
430  {
431  tls_add_vpp_q_builtin_rx_evt (tls_session);
432  return wrote;
433  }
434 
435  deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max);
436  read = SSL_read (oc->ssl, svm_fifo_tail (f), deq_now);
437  if (read <= 0)
438  {
439  tls_add_vpp_q_builtin_rx_evt (tls_session);
440  return wrote;
441  }
442  svm_fifo_enqueue_nocopy (f, read);
443  if (read < enq_max && BIO_ctrl_pending (oc->wbio) > 0)
444  {
445  deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max - read);
446  read = SSL_read (oc->ssl, svm_fifo_tail (f), deq_now);
447  if (read > 0)
448  svm_fifo_enqueue_nocopy (f, read);
449  }
450 
451  tls_notify_app_enqueue (ctx, app_session);
452  if (BIO_ctrl_pending (oc->wbio) > 0)
453  tls_add_vpp_q_builtin_rx_evt (tls_session);
454 
455  return wrote;
456 }
457 
458 static int
460 {
461  long flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_COMPRESSION;
462  openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
464  session_t *tls_session;
465  const SSL_METHOD *method;
466  int rv, err;
467 #ifdef HAVE_OPENSSL_ASYNC
468  openssl_resume_handler *handler;
469 #endif
470 
471  method = SSLv23_client_method ();
472  if (method == NULL)
473  {
474  TLS_DBG (1, "SSLv23_method returned null");
475  return -1;
476  }
477 
478  oc->ssl_ctx = SSL_CTX_new (method);
479  if (oc->ssl_ctx == NULL)
480  {
481  TLS_DBG (1, "SSL_CTX_new returned null");
482  return -1;
483  }
484 
485  SSL_CTX_set_ecdh_auto (oc->ssl_ctx, 1);
486  SSL_CTX_set_mode (oc->ssl_ctx, SSL_MODE_ENABLE_PARTIAL_WRITE);
487 #ifdef HAVE_OPENSSL_ASYNC
488  if (om->async)
489  SSL_CTX_set_mode (oc->ssl_ctx, SSL_MODE_ASYNC);
490 #endif
491  rv = SSL_CTX_set_cipher_list (oc->ssl_ctx, (const char *) om->ciphers);
492  if (rv != 1)
493  {
494  TLS_DBG (1, "Couldn't set cipher");
495  return -1;
496  }
497 
498  SSL_CTX_set_options (oc->ssl_ctx, flags);
499  SSL_CTX_set_cert_store (oc->ssl_ctx, om->cert_store);
500 
501  oc->ssl = SSL_new (oc->ssl_ctx);
502  if (oc->ssl == NULL)
503  {
504  TLS_DBG (1, "Couldn't initialize ssl struct");
505  return -1;
506  }
507 
508  oc->rbio = BIO_new (BIO_s_mem ());
509  oc->wbio = BIO_new (BIO_s_mem ());
510 
511  BIO_set_mem_eof_return (oc->rbio, -1);
512  BIO_set_mem_eof_return (oc->wbio, -1);
513 
514  SSL_set_bio (oc->ssl, oc->wbio, oc->rbio);
515  SSL_set_connect_state (oc->ssl);
516 
517  rv = SSL_set_tlsext_host_name (oc->ssl, ctx->srv_hostname);
518  if (rv != 1)
519  {
520  TLS_DBG (1, "Couldn't set hostname");
521  return -1;
522  }
523 
524  /*
525  * 2. Do the first steps in the handshake.
526  */
527  TLS_DBG (1, "Initiating handshake for [%u]%u", ctx->c_thread_index,
528  oc->openssl_ctx_index);
529 
530  tls_session = session_get_from_handle (ctx->tls_session_handle);
531  while (1)
532  {
533  rv = SSL_do_handshake (oc->ssl);
534  err = SSL_get_error (oc->ssl, rv);
535  openssl_try_handshake_write (oc, tls_session);
536 #ifdef HAVE_OPENSSL_ASYNC
537  if (err == SSL_ERROR_WANT_ASYNC)
538  {
540  vpp_ssl_async_process_event (ctx, handler);
541  break;
542  }
543 #endif
544  if (err != SSL_ERROR_WANT_WRITE)
545  break;
546  }
547 
548  TLS_DBG (2, "tls state for [%u]%u is su", ctx->c_thread_index,
549  oc->openssl_ctx_index, SSL_state_string_long (oc->ssl));
550  return 0;
551 }
552 
553 static int
555 {
556  application_t *app;
557  const SSL_METHOD *method;
558  SSL_CTX *ssl_ctx;
559  int rv;
560  BIO *cert_bio;
561  X509 *srvcert;
562  EVP_PKEY *pkey;
563  u32 olc_index;
565  app_worker_t *app_wrk;
566 
567  long flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_COMPRESSION;
569 
570  app_wrk = app_worker_get (lctx->parent_app_wrk_index);
571  if (!app_wrk)
572  return -1;
573 
574  app = application_get (app_wrk->app_index);
575  if (!app->tls_cert || !app->tls_key)
576  {
577  TLS_DBG (1, "tls cert and/or key not configured %d",
578  lctx->parent_app_wrk_index);
579  return -1;
580  }
581 
582  method = SSLv23_method ();
583  ssl_ctx = SSL_CTX_new (method);
584  if (!ssl_ctx)
585  {
586  clib_warning ("Unable to create SSL context");
587  return -1;
588  }
589 
590  SSL_CTX_set_mode (ssl_ctx, SSL_MODE_ENABLE_PARTIAL_WRITE);
591 #ifdef HAVE_OPENSSL_ASYNC
592  if (om->async)
593  SSL_CTX_set_mode (ssl_ctx, SSL_MODE_ASYNC);
594  SSL_CTX_set_async_callback (ssl_ctx, tls_async_openssl_callback);
595 #endif
596  SSL_CTX_set_options (ssl_ctx, flags);
597  SSL_CTX_set_ecdh_auto (ssl_ctx, 1);
598 
599  rv = SSL_CTX_set_cipher_list (ssl_ctx, (const char *) om->ciphers);
600  if (rv != 1)
601  {
602  TLS_DBG (1, "Couldn't set cipher");
603  return -1;
604  }
605 
606  /*
607  * Set the key and cert
608  */
609  cert_bio = BIO_new (BIO_s_mem ());
610  BIO_write (cert_bio, app->tls_cert, vec_len (app->tls_cert));
611  srvcert = PEM_read_bio_X509 (cert_bio, NULL, NULL, NULL);
612  if (!srvcert)
613  {
614  clib_warning ("unable to parse certificate");
615  return -1;
616  }
617  SSL_CTX_use_certificate (ssl_ctx, srvcert);
618  BIO_free (cert_bio);
619 
620  cert_bio = BIO_new (BIO_s_mem ());
621  BIO_write (cert_bio, app->tls_key, vec_len (app->tls_key));
622  pkey = PEM_read_bio_PrivateKey (cert_bio, NULL, NULL, NULL);
623  if (!pkey)
624  {
625  clib_warning ("unable to parse pkey");
626  return -1;
627  }
628  SSL_CTX_use_PrivateKey (ssl_ctx, pkey);
629  BIO_free (cert_bio);
630 
631  olc_index = openssl_listen_ctx_alloc ();
632  olc = openssl_lctx_get (olc_index);
633  olc->ssl_ctx = ssl_ctx;
634  olc->srvcert = srvcert;
635  olc->pkey = pkey;
636 
637  /* store SSL_CTX into TLS level structure */
638  lctx->tls_ssl_ctx = olc_index;
639 
640  return 0;
641 
642 }
643 
644 static int
646 {
647  u32 olc_index;
649 
650  olc_index = lctx->tls_ssl_ctx;
651  olc = openssl_lctx_get (olc_index);
652 
653  X509_free (olc->srvcert);
654  EVP_PKEY_free (olc->pkey);
655 
656  SSL_CTX_free (olc->ssl_ctx);
658 
659  return 0;
660 }
661 
662 static int
664 {
665  openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
666  u32 olc_index = ctx->tls_ssl_ctx;
668  session_t *tls_session;
669  int rv, err;
670 #ifdef HAVE_OPENSSL_ASYNC
671  openssl_resume_handler *handler;
672 #endif
673 
674  /* Start a new connection */
675 
676  olc = openssl_lctx_get (olc_index);
677  oc->ssl = SSL_new (olc->ssl_ctx);
678  if (oc->ssl == NULL)
679  {
680  TLS_DBG (1, "Couldn't initialize ssl struct");
681  return -1;
682  }
683 
684  oc->rbio = BIO_new (BIO_s_mem ());
685  oc->wbio = BIO_new (BIO_s_mem ());
686 
687  BIO_set_mem_eof_return (oc->rbio, -1);
688  BIO_set_mem_eof_return (oc->wbio, -1);
689 
690  SSL_set_bio (oc->ssl, oc->wbio, oc->rbio);
691  SSL_set_accept_state (oc->ssl);
692 
693  TLS_DBG (1, "Initiating handshake for [%u]%u", ctx->c_thread_index,
694  oc->openssl_ctx_index);
695 
696  tls_session = session_get_from_handle (ctx->tls_session_handle);
697  while (1)
698  {
699  rv = SSL_do_handshake (oc->ssl);
700  err = SSL_get_error (oc->ssl, rv);
701  openssl_try_handshake_write (oc, tls_session);
702 #ifdef HAVE_OPENSSL_ASYNC
703  if (err == SSL_ERROR_WANT_ASYNC)
704  {
706  vpp_ssl_async_process_event (ctx, handler);
707  break;
708  }
709 #endif
710  if (err != SSL_ERROR_WANT_WRITE)
711  break;
712  }
713 
714  TLS_DBG (2, "tls state for [%u]%u is su", ctx->c_thread_index,
715  oc->openssl_ctx_index, SSL_state_string_long (oc->ssl));
716  return 0;
717 }
718 
719 static u8
721 {
722  openssl_ctx_t *mc = (openssl_ctx_t *) ctx;
723  if (!mc->ssl)
724  return 0;
725  return SSL_is_init_finished (mc->ssl);
726 }
727 
728 const static tls_engine_vft_t openssl_engine = {
730  .ctx_free = openssl_ctx_free,
731  .ctx_get = openssl_ctx_get,
732  .ctx_get_w_thread = openssl_ctx_get_w_thread,
733  .ctx_init_server = openssl_ctx_init_server,
734  .ctx_init_client = openssl_ctx_init_client,
735  .ctx_write = openssl_ctx_write,
736  .ctx_read = openssl_ctx_read,
737  .ctx_handshake_is_over = openssl_handshake_is_over,
738  .ctx_start_listen = openssl_start_listen,
739  .ctx_stop_listen = openssl_stop_listen,
740 };
741 
742 int
744 {
746  tls_main_t *tm = vnet_tls_get_main ();
747  BIO *cert_bio;
748  X509 *testcert;
749  int rv;
750 
751  if (access (tm->ca_cert_path, F_OK | R_OK) == -1)
752  {
753  clib_warning ("Could not initialize TLS CA certificates");
754  return -1;
755  }
756 
757  if (!(om->cert_store = X509_STORE_new ()))
758  {
759  clib_warning ("failed to create cert store");
760  return -1;
761  }
762 
763  rv = X509_STORE_load_locations (om->cert_store, tm->ca_cert_path, 0);
764  if (rv < 0)
765  {
766  clib_warning ("failed to load ca certificate");
767  }
768 
769  if (tm->use_test_cert_in_ca)
770  {
771  cert_bio = BIO_new (BIO_s_mem ());
772  BIO_write (cert_bio, test_srv_crt_rsa, test_srv_crt_rsa_len);
773  testcert = PEM_read_bio_X509 (cert_bio, NULL, NULL, NULL);
774  if (!testcert)
775  {
776  clib_warning ("unable to parse certificate");
777  return -1;
778  }
779  X509_STORE_add_cert (om->cert_store, testcert);
780  rv = 0;
781  }
782  return (rv < 0 ? -1 : 0);
783 }
784 
785 static int
786 tls_openssl_set_ciphers (char *ciphers)
787 {
789  int i;
790 
791  if (!ciphers)
792  {
793  return -1;
794  }
795 
796  vec_validate (om->ciphers, strlen (ciphers) - 1);
797  for (i = 0; i < vec_len (om->ciphers); i++)
798  {
799  om->ciphers[i] = toupper (ciphers[i]);
800  }
801 
802  return 0;
803 
804 }
805 
806 static clib_error_t *
808 {
811  clib_error_t *error;
812  u32 num_threads;
813 
814  num_threads = 1 /* main thread */ + vtm->n_threads;
815 
816  if ((error = vlib_call_init_function (vm, tls_init)))
817  return error;
818 
819  SSL_library_init ();
820  SSL_load_error_strings ();
821 
822  if (tls_init_ca_chain ())
823  {
824  clib_warning ("failed to initialize TLS CA chain");
825  return 0;
826  }
827 
828  vec_validate (om->ctx_pool, num_threads - 1);
829 
830  tls_register_engine (&openssl_engine, TLS_ENGINE_OPENSSL);
831 
832  om->engine_init = 0;
833 
834  /* default ciphers */
836  ("ALL:!ADH:!LOW:!EXP:!MD5:!RC4-SHA:!DES-CBC3-SHA:@STRENGTH");
837 
838  return 0;
839 }
840 
841 #ifdef HAVE_OPENSSL_ASYNC
842 static clib_error_t *
843 tls_openssl_set_command_fn (vlib_main_t * vm, unformat_input_t * input,
844  vlib_cli_command_t * cmd)
845 {
847  char *engine_name = NULL;
848  char *engine_alg = NULL;
849  char *ciphers = NULL;
850  u8 engine_name_set = 0;
851  int i;
852 
853  /* By present, it is not allowed to configure engine again after running */
854  if (om->engine_init)
855  {
856  clib_warning ("engine has started!\n");
857  return clib_error_return
858  (0, "engine has started, and no config is accepted");
859  }
860 
862  {
863  if (unformat (input, "engine %s", &engine_name))
864  {
865  engine_name_set = 1;
866  }
867  else if (unformat (input, "async"))
868  {
869  om->async = 1;
871  }
872  else if (unformat (input, "alg %s", &engine_alg))
873  {
874  for (i = 0; i < strnlen (engine_alg, MAX_CRYPTO_LEN); i++)
875  engine_alg[i] = toupper (engine_alg[i]);
876  }
877  else if (unformat (input, "ciphers %s", &ciphers))
878  {
879  tls_openssl_set_ciphers (ciphers);
880  }
881  else
882  return clib_error_return (0, "failed: unknown input `%U'",
883  format_unformat_error, input);
884  }
885 
886  /* reset parameters if engine is not configured */
887  if (!engine_name_set)
888  {
889  clib_warning ("No engine provided! \n");
890  om->async = 0;
891  }
892  else
893  {
894  if (!openssl_engine_register (engine_name, engine_alg))
895  {
896  return clib_error_return (0, "failed to register %s polling",
897  engine_name);
898  }
899  }
900 
901  return 0;
902 }
903 
904 /* *INDENT-OFF* */
905 VLIB_CLI_COMMAND (tls_openssl_set_command, static) =
906 {
907  .path = "tls openssl set",
908  .short_help = "tls openssl set [engine <engine name>] [alg [algorithm] [async]",
909  .function = tls_openssl_set_command_fn,
910 };
911 /* *INDENT-ON* */
912 #endif
913 
914 
916 
917 /* *INDENT-OFF* */
919  .version = VPP_BUILD_VER,
920  .description = "Transport Layer Security (TLS) Engine, OpenSSL Based",
921 };
922 /* *INDENT-ON* */
923 
924 /*
925  * fd.io coding-style-patch-verification: ON
926  *
927  * Local Variables:
928  * eval: (c-set-style "gnu")
929  * End:
930  */
tls_main_t * vnet_tls_get_main(void)
Definition: tls.c:833
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:439
openssl_listen_ctx_t * lctx_pool
Definition: tls_openssl.h:46
int(* callback)(SSL *ssl, void *arg)
Definition: tls_openssl.h:56
static int tls_openssl_set_ciphers(char *ciphers)
Definition: tls_openssl.c:786
u32 flags
Definition: vhost_user.h:115
#define clib_min(x, y)
Definition: clib.h:295
static u8 openssl_handshake_is_over(tls_ctx_t *ctx)
Definition: tls_openssl.c:720
X509_STORE * cert_store
Definition: tls_openssl.h:48
svm_fifo_t * tx_fifo
char * ca_cert_path
Definition: tls.h:94
#define NULL
Definition: clib.h:58
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
svm_fifo_t * rx_fifo
Pointers to rx/tx buffers.
void openssl_async_node_enable_disable(u8 is_en)
Definition: tls_async.c:428
int tls_add_vpp_q_builtin_rx_evt(session_t *s)
Definition: tls.c:62
static u32 openssl_ctx_alloc(void)
Definition: tls_openssl.c:33
static void openssl_listen_ctx_free(openssl_listen_ctx_t *lctx)
Definition: tls_openssl.c:96
int tls_async_openssl_callback(SSL *s, void *evt)
Definition: tls_async.c:250
int i
static void openssl_ctx_free(tls_ctx_t *ctx)
Definition: tls_openssl.c:52
u8 use_test_cert_in_ca
Definition: tls.h:93
static u32 svm_fifo_max_enqueue(svm_fifo_t *f)
Definition: svm_fifo.h:147
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:236
static u8 * svm_fifo_tail(svm_fifo_t *f)
Definition: svm_fifo.h:248
unsigned char u8
Definition: types.h:56
struct _svm_fifo svm_fifo_t
static void svm_fifo_enqueue_nocopy(svm_fifo_t *f, u32 bytes)
Advance tail pointer.
Definition: svm_fifo.h:234
SSL_CTX * ssl_ctx
Definition: tls_openssl.h:28
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:163
static u32 svm_fifo_max_dequeue(svm_fifo_t *f)
Definition: svm_fifo.h:129
u8 is_passive_close
Definition: tls.h:76
int openssl_engine_register(char *engine_name, char *algorithm)
Definition: tls_async.c:126
#define MAX_CRYPTO_LEN
Definition: tls_openssl.c:29
#define clib_error_return(e, args...)
Definition: error.h:99
static int openssl_stop_listen(tls_ctx_t *lctx)
Definition: tls_openssl.c:645
static u32 svm_fifo_max_write_chunk(svm_fifo_t *f)
Max contiguous chunk of data that can be written.
Definition: svm_fifo.h:223
unsigned int u32
Definition: types.h:88
#define vlib_call_init_function(vm, x)
Definition: init.h:260
static u8 * svm_fifo_head(svm_fifo_t *f)
Definition: svm_fifo.h:242
int tls_add_vpp_q_builtin_tx_evt(session_t *s)
Definition: tls.c:78
static u32 svm_fifo_max_read_chunk(svm_fifo_t *f)
Max contiguous chunk of data that can be read.
Definition: svm_fifo.h:214
int tls_init_ca_chain(void)
Definition: tls_openssl.c:743
#define TLS_CHUNK_SIZE
Definition: tls.h:28
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:514
int vpp_add_async_run_event(tls_ctx_t *ctx, openssl_resume_handler *handler)
Definition: tls_async.c:316
static session_t * session_get_from_handle(session_handle_t handle)
Definition: session.h:227
long ctx[MAX_CONNS]
Definition: main.c:144
struct _unformat_input_t unformat_input_t
Definition: tls.h:81
int tls_notify_app_connected(tls_ctx_t *ctx, u8 is_failed)
Definition: tls.c:222
#define PREDICT_FALSE(x)
Definition: clib.h:111
tls_ctx_t * openssl_ctx_get(u32 ctx_index)
Definition: tls_openssl.c:66
static const char test_srv_crt_rsa[]
Definition: tls_test.h:23
Definition: tls.h:57
u32(* ctx_alloc)(void)
Definition: tls.h:101
static int openssl_ctx_init_client(tls_ctx_t *ctx)
Definition: tls_openssl.c:459
#define UNFORMAT_END_OF_INPUT
Definition: format.h:144
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:212
openssl_ctx_t *** ctx_pool
Definition: tls_openssl.h:45
#define clib_warning(format, args...)
Definition: error.h:59
#define SESSION_INVALID_HANDLE
Definition: session_table.h:59
static int openssl_ctx_write(tls_ctx_t *ctx, session_t *app_session)
Definition: tls_openssl.c:300
static int openssl_try_handshake_write(openssl_ctx_t *oc, session_t *tls_session)
Definition: tls_openssl.c:139
static int openssl_ctx_read(tls_ctx_t *ctx, session_t *tls_session)
Definition: tls_openssl.c:378
static openssl_main_t openssl_main
Definition: tls_openssl.c:31
int tls_add_vpp_q_tx_evt(session_t *s)
Definition: tls.c:70
void tls_register_engine(const tls_engine_vft_t *vft, tls_engine_type_t type)
Definition: tls.c:747
application_t * application_get(u32 app_index)
Definition: application.c:447
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:155
#define pool_put_index(p, i)
Free pool element with given index.
Definition: pool.h:311
int openssl_resume_handler(tls_ctx_t *ctx, session_t *tls_session)
Definition: tls_openssl.h:60
static clib_error_t * tls_openssl_init(vlib_main_t *vm)
Definition: tls_openssl.c:807
u8 * tls_key
PEM encoded key.
Definition: application.h:119
static void * clib_mem_alloc(uword size)
Definition: mem.h:132
tls_ctx_t * openssl_ctx_get_w_thread(u32 ctx_index, u8 thread_index)
Definition: tls_openssl.c:75
static int openssl_ctx_init_server(tls_ctx_t *ctx)
Definition: tls_openssl.c:663
int svm_fifo_dequeue_drop(svm_fifo_t *f, u32 max_bytes)
Definition: svm_fifo.c:734
app_worker_t * app_worker_get(u32 wrk_index)
openssl_tls_callback_t * vpp_add_async_pending_event(tls_ctx_t *ctx, openssl_resume_handler *handler)
Definition: tls_async.c:286
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
static int openssl_start_listen(tls_ctx_t *lctx)
Definition: tls_openssl.c:554
int openssl_ctx_handshake_rx(tls_ctx_t *ctx, session_t *tls_session)
Definition: tls_openssl.c:208
u8 * srv_hostname
Definition: tls.h:78
VLIB_PLUGIN_REGISTER()
int tls_notify_app_accept(tls_ctx_t *ctx)
Definition: tls.c:190
u32 app_index
Index of owning app.
Definition: application.h:43
u8 resume
Definition: tls.h:77
void tls_notify_app_enqueue(tls_ctx_t *ctx, session_t *app_session)
Definition: tls.c:181
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
static int openssl_try_handshake_read(openssl_ctx_t *oc, session_t *tls_session)
Definition: tls_openssl.c:108
static vlib_thread_main_t * vlib_get_thread_main()
Definition: global_funcs.h:32
u8 * tls_cert
Certificate to be used for listen sessions.
Definition: application.h:116
openssl_listen_ctx_t * openssl_lctx_get(u32 lctx_index)
Definition: tls_openssl.c:102
static u32 openssl_listen_ctx_alloc(void)
Definition: tls_openssl.c:83
static clib_error_t * tls_init(vlib_main_t *vm)
Definition: tls.c:754
#define TLS_DBG(_lvl, _fmt, _args...)
Definition: tls.h:36
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972
static const u32 test_srv_crt_rsa_len
Definition: tls_test.h:47
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:170