| /* |
| * Copyright (c) 2018 Cisco and/or its affiliates. |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <openssl/ssl.h> |
| #include <openssl/conf.h> |
| #include <openssl/err.h> |
| #ifdef HAVE_OPENSSL_ASYNC |
| #include <openssl/async.h> |
| #endif |
| #include <dlfcn.h> |
| #include <vnet/plugin/plugin.h> |
| #include <vpp/app/version.h> |
| #include <vnet/tls/tls.h> |
| #include <ctype.h> |
| #include <tlsopenssl/tls_openssl.h> |
| |
| #define MAX_CRYPTO_LEN 16 |
| |
| static openssl_main_t openssl_main; |
| static u32 |
| openssl_ctx_alloc (void) |
| { |
| u8 thread_index = vlib_get_thread_index (); |
| openssl_main_t *tm = &openssl_main; |
| openssl_ctx_t **ctx; |
| |
| pool_get (tm->ctx_pool[thread_index], ctx); |
| if (!(*ctx)) |
| *ctx = clib_mem_alloc (sizeof (openssl_ctx_t)); |
| |
| clib_memset (*ctx, 0, sizeof (openssl_ctx_t)); |
| (*ctx)->ctx.c_thread_index = thread_index; |
| (*ctx)->ctx.tls_ctx_engine = TLS_ENGINE_OPENSSL; |
| (*ctx)->ctx.app_session_handle = SESSION_INVALID_HANDLE; |
| (*ctx)->openssl_ctx_index = ctx - tm->ctx_pool[thread_index]; |
| return ((*ctx)->openssl_ctx_index); |
| } |
| |
| static void |
| openssl_ctx_free (tls_ctx_t * ctx) |
| { |
| openssl_ctx_t *oc = (openssl_ctx_t *) ctx; |
| |
| if (SSL_is_init_finished (oc->ssl) && !ctx->is_passive_close) |
| SSL_shutdown (oc->ssl); |
| |
| SSL_free (oc->ssl); |
| |
| vec_free (ctx->srv_hostname); |
| pool_put_index (openssl_main.ctx_pool[ctx->c_thread_index], |
| oc->openssl_ctx_index); |
| } |
| |
| tls_ctx_t * |
| openssl_ctx_get (u32 ctx_index) |
| { |
| openssl_ctx_t **ctx; |
| ctx = pool_elt_at_index (openssl_main.ctx_pool[vlib_get_thread_index ()], |
| ctx_index); |
| return &(*ctx)->ctx; |
| } |
| |
| tls_ctx_t * |
| openssl_ctx_get_w_thread (u32 ctx_index, u8 thread_index) |
| { |
| openssl_ctx_t **ctx; |
| ctx = pool_elt_at_index (openssl_main.ctx_pool[thread_index], ctx_index); |
| return &(*ctx)->ctx; |
| } |
| |
| static u32 |
| openssl_listen_ctx_alloc (void) |
| { |
| openssl_main_t *om = &openssl_main; |
| openssl_listen_ctx_t *lctx; |
| |
| pool_get (om->lctx_pool, lctx); |
| |
| clib_memset (lctx, 0, sizeof (openssl_listen_ctx_t)); |
| lctx->openssl_lctx_index = lctx - om->lctx_pool; |
| return lctx->openssl_lctx_index; |
| } |
| |
| static void |
| openssl_listen_ctx_free (openssl_listen_ctx_t * lctx) |
| { |
| pool_put_index (openssl_main.lctx_pool, lctx->openssl_lctx_index); |
| } |
| |
| openssl_listen_ctx_t * |
| openssl_lctx_get (u32 lctx_index) |
| { |
| return pool_elt_at_index (openssl_main.lctx_pool, lctx_index); |
| } |
| |
| static int |
| openssl_try_handshake_read (openssl_ctx_t * oc, session_t * tls_session) |
| { |
| u32 deq_max, deq_now; |
| svm_fifo_t *f; |
| int wrote, rv; |
| |
| f = tls_session->rx_fifo; |
| deq_max = svm_fifo_max_dequeue_cons (f); |
| if (!deq_max) |
| return 0; |
| |
| deq_now = clib_min (svm_fifo_max_read_chunk (f), deq_max); |
| wrote = BIO_write (oc->wbio, svm_fifo_head (f), deq_now); |
| if (wrote <= 0) |
| return 0; |
| |
| svm_fifo_dequeue_drop (f, wrote); |
| if (wrote < deq_max) |
| { |
| deq_now = clib_min (svm_fifo_max_read_chunk (f), deq_max - wrote); |
| rv = BIO_write (oc->wbio, svm_fifo_head (f), deq_now); |
| if (rv > 0) |
| { |
| svm_fifo_dequeue_drop (f, rv); |
| wrote += rv; |
| } |
| } |
| return wrote; |
| } |
| |
| static int |
| openssl_try_handshake_write (openssl_ctx_t * oc, session_t * tls_session) |
| { |
| u32 enq_max, deq_now; |
| svm_fifo_t *f; |
| int read, rv; |
| |
| if (BIO_ctrl_pending (oc->rbio) <= 0) |
| return 0; |
| |
| f = tls_session->tx_fifo; |
| enq_max = svm_fifo_max_enqueue_prod (f); |
| if (!enq_max) |
| return 0; |
| |
| deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max); |
| read = BIO_read (oc->rbio, svm_fifo_tail (f), deq_now); |
| if (read <= 0) |
| return 0; |
| |
| svm_fifo_enqueue_nocopy (f, read); |
| tls_add_vpp_q_tx_evt (tls_session); |
| |
| if (read < enq_max) |
| { |
| deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max - read); |
| rv = BIO_read (oc->rbio, svm_fifo_tail (f), deq_now); |
| if (rv > 0) |
| { |
| svm_fifo_enqueue_nocopy (f, rv); |
| read += rv; |
| } |
| } |
| |
| return read; |
| } |
| |
| #ifdef HAVE_OPENSSL_ASYNC |
| static int |
| vpp_ssl_async_process_event (tls_ctx_t * ctx, |
| openssl_resume_handler * handler) |
| { |
| openssl_ctx_t *oc = (openssl_ctx_t *) ctx; |
| openssl_tls_callback_t *engine_cb; |
| |
| engine_cb = vpp_add_async_pending_event (ctx, handler); |
| if (engine_cb) |
| { |
| SSL_set_async_callback_arg (oc->ssl, (void *) engine_cb->arg); |
| TLS_DBG (2, "set callback to engine %p\n", engine_cb->callback); |
| } |
| return 0; |
| |
| } |
| |
| /* Due to engine busy stat, VPP need to retry later */ |
| static int |
| vpp_ssl_async_retry_func (tls_ctx_t * ctx, openssl_resume_handler * handler) |
| { |
| |
| if (vpp_add_async_run_event (ctx, handler)) |
| return 1; |
| |
| return 0; |
| |
| } |
| |
| #endif |
| |
| int |
| openssl_ctx_handshake_rx (tls_ctx_t * ctx, session_t * tls_session) |
| { |
| openssl_ctx_t *oc = (openssl_ctx_t *) ctx; |
| int rv = 0, err; |
| #ifdef HAVE_OPENSSL_ASYNC |
| int estatus; |
| openssl_resume_handler *myself; |
| #endif |
| |
| while (SSL_in_init (oc->ssl)) |
| { |
| if (ctx->resume) |
| { |
| ctx->resume = 0; |
| } |
| else if (!openssl_try_handshake_read (oc, tls_session)) |
| { |
| break; |
| } |
| |
| #ifdef HAVE_OPENSSL_ASYNC |
| myself = openssl_ctx_handshake_rx; |
| vpp_ssl_async_process_event (ctx, myself); |
| #endif |
| |
| rv = SSL_do_handshake (oc->ssl); |
| err = SSL_get_error (oc->ssl, rv); |
| openssl_try_handshake_write (oc, tls_session); |
| #ifdef HAVE_OPENSSL_ASYNC |
| if (err == SSL_ERROR_WANT_ASYNC) |
| { |
| SSL_get_async_status (oc->ssl, &estatus); |
| |
| if (estatus == ASYNC_STATUS_EAGAIN) |
| { |
| vpp_ssl_async_retry_func (ctx, myself); |
| } |
| } |
| #endif |
| |
| if (err != SSL_ERROR_WANT_WRITE) |
| { |
| if (err == SSL_ERROR_SSL) |
| { |
| char buf[512]; |
| ERR_error_string (ERR_get_error (), buf); |
| clib_warning ("Err: %s", buf); |
| } |
| break; |
| } |
| } |
| TLS_DBG (2, "tls state for %u is %s", oc->openssl_ctx_index, |
| SSL_state_string_long (oc->ssl)); |
| |
| if (SSL_in_init (oc->ssl)) |
| return 0; |
| |
| /* |
| * Handshake complete |
| */ |
| if (!SSL_is_server (oc->ssl)) |
| { |
| /* |
| * Verify server certificate |
| */ |
| if ((rv = SSL_get_verify_result (oc->ssl)) != X509_V_OK) |
| { |
| TLS_DBG (1, " failed verify: %s\n", |
| X509_verify_cert_error_string (rv)); |
| |
| /* |
| * Presence of hostname enforces strict certificate verification |
| */ |
| if (ctx->srv_hostname) |
| { |
| tls_notify_app_connected (ctx, /* is failed */ 0); |
| return -1; |
| } |
| } |
| tls_notify_app_connected (ctx, /* is failed */ 0); |
| } |
| else |
| { |
| tls_notify_app_accept (ctx); |
| } |
| |
| TLS_DBG (1, "Handshake for %u complete. TLS cipher is %s", |
| oc->openssl_ctx_index, SSL_get_cipher (oc->ssl)); |
| return rv; |
| } |
| |
| static inline int |
| openssl_ctx_write (tls_ctx_t * ctx, session_t * app_session) |
| { |
| openssl_ctx_t *oc = (openssl_ctx_t *) ctx; |
| int wrote = 0, rv, read, max_buf = 100 * TLS_CHUNK_SIZE, max_space; |
| u32 enq_max, deq_max, deq_now, to_write; |
| session_t *tls_session; |
| svm_fifo_t *f; |
| |
| f = app_session->tx_fifo; |
| deq_max = svm_fifo_max_dequeue_cons (f); |
| if (!deq_max) |
| goto check_tls_fifo; |
| |
| max_space = max_buf - BIO_ctrl_pending (oc->rbio); |
| max_space = (max_space < 0) ? 0 : max_space; |
| deq_now = clib_min (deq_max, (u32) max_space); |
| to_write = clib_min (svm_fifo_max_read_chunk (f), deq_now); |
| wrote = SSL_write (oc->ssl, svm_fifo_head (f), to_write); |
| if (wrote <= 0) |
| { |
| tls_add_vpp_q_builtin_tx_evt (app_session); |
| goto check_tls_fifo; |
| } |
| svm_fifo_dequeue_drop (app_session->tx_fifo, wrote); |
| if (wrote < deq_now) |
| { |
| to_write = clib_min (svm_fifo_max_read_chunk (f), deq_now - wrote); |
| rv = SSL_write (oc->ssl, svm_fifo_head (f), to_write); |
| if (rv > 0) |
| { |
| svm_fifo_dequeue_drop (app_session->tx_fifo, rv); |
| wrote += rv; |
| } |
| } |
| |
| if (wrote < deq_max) |
| tls_add_vpp_q_builtin_tx_evt (app_session); |
| |
| check_tls_fifo: |
| |
| if (BIO_ctrl_pending (oc->rbio) <= 0) |
| return wrote; |
| |
| tls_session = session_get_from_handle (ctx->tls_session_handle); |
| f = tls_session->tx_fifo; |
| enq_max = svm_fifo_max_enqueue_prod (f); |
| if (!enq_max) |
| { |
| tls_add_vpp_q_builtin_tx_evt (app_session); |
| return wrote; |
| } |
| |
| deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max); |
| read = BIO_read (oc->rbio, svm_fifo_tail (f), deq_now); |
| if (read <= 0) |
| { |
| tls_add_vpp_q_builtin_tx_evt (app_session); |
| return wrote; |
| } |
| |
| svm_fifo_enqueue_nocopy (f, read); |
| tls_add_vpp_q_tx_evt (tls_session); |
| |
| if (read < enq_max && BIO_ctrl_pending (oc->rbio) > 0) |
| { |
| deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max - read); |
| read = BIO_read (oc->rbio, svm_fifo_tail (f), deq_now); |
| if (read > 0) |
| svm_fifo_enqueue_nocopy (f, read); |
| } |
| |
| if (BIO_ctrl_pending (oc->rbio) > 0) |
| tls_add_vpp_q_builtin_tx_evt (app_session); |
| |
| return wrote; |
| } |
| |
| static inline int |
| openssl_ctx_read (tls_ctx_t * ctx, session_t * tls_session) |
| { |
| int read, wrote = 0, max_space, max_buf = 100 * TLS_CHUNK_SIZE, rv; |
| openssl_ctx_t *oc = (openssl_ctx_t *) ctx; |
| u32 deq_max, enq_max, deq_now, to_read; |
| session_t *app_session; |
| svm_fifo_t *f; |
| |
| if (PREDICT_FALSE (SSL_in_init (oc->ssl))) |
| { |
| openssl_ctx_handshake_rx (ctx, tls_session); |
| return 0; |
| } |
| |
| f = tls_session->rx_fifo; |
| deq_max = svm_fifo_max_dequeue_cons (f); |
| max_space = max_buf - BIO_ctrl_pending (oc->wbio); |
| max_space = max_space < 0 ? 0 : max_space; |
| deq_now = clib_min (deq_max, max_space); |
| if (!deq_now) |
| goto check_app_fifo; |
| |
| to_read = clib_min (svm_fifo_max_read_chunk (f), deq_now); |
| wrote = BIO_write (oc->wbio, svm_fifo_head (f), to_read); |
| if (wrote <= 0) |
| { |
| tls_add_vpp_q_builtin_rx_evt (tls_session); |
| goto check_app_fifo; |
| } |
| svm_fifo_dequeue_drop (f, wrote); |
| if (wrote < deq_now) |
| { |
| to_read = clib_min (svm_fifo_max_read_chunk (f), deq_now - wrote); |
| rv = BIO_write (oc->wbio, svm_fifo_head (f), to_read); |
| if (rv > 0) |
| { |
| svm_fifo_dequeue_drop (f, rv); |
| wrote += rv; |
| } |
| } |
| if (svm_fifo_max_dequeue_cons (f)) |
| tls_add_vpp_q_builtin_rx_evt (tls_session); |
| |
| check_app_fifo: |
| |
| if (BIO_ctrl_pending (oc->wbio) <= 0) |
| return wrote; |
| |
| app_session = session_get_from_handle (ctx->app_session_handle); |
| f = app_session->rx_fifo; |
| enq_max = svm_fifo_max_enqueue_prod (f); |
| if (!enq_max) |
| { |
| tls_add_vpp_q_builtin_rx_evt (tls_session); |
| return wrote; |
| } |
| |
| deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max); |
| read = SSL_read (oc->ssl, svm_fifo_tail (f), deq_now); |
| if (read <= 0) |
| { |
| tls_add_vpp_q_builtin_rx_evt (tls_session); |
| return wrote; |
| } |
| svm_fifo_enqueue_nocopy (f, read); |
| if (read < enq_max && BIO_ctrl_pending (oc->wbio) > 0) |
| { |
| deq_now = clib_min (svm_fifo_max_write_chunk (f), enq_max - read); |
| read = SSL_read (oc->ssl, svm_fifo_tail (f), deq_now); |
| if (read > 0) |
| svm_fifo_enqueue_nocopy (f, read); |
| } |
| |
| tls_notify_app_enqueue (ctx, app_session); |
| if (BIO_ctrl_pending (oc->wbio) > 0) |
| tls_add_vpp_q_builtin_rx_evt (tls_session); |
| |
| return wrote; |
| } |
| |
| static int |
| openssl_ctx_init_client (tls_ctx_t * ctx) |
| { |
| long flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_COMPRESSION; |
| openssl_ctx_t *oc = (openssl_ctx_t *) ctx; |
| openssl_main_t *om = &openssl_main; |
| session_t *tls_session; |
| const SSL_METHOD *method; |
| int rv, err; |
| #ifdef HAVE_OPENSSL_ASYNC |
| openssl_resume_handler *handler; |
| #endif |
| |
| method = SSLv23_client_method (); |
| if (method == NULL) |
| { |
| TLS_DBG (1, "SSLv23_method returned null"); |
| return -1; |
| } |
| |
| oc->ssl_ctx = SSL_CTX_new (method); |
| if (oc->ssl_ctx == NULL) |
| { |
| TLS_DBG (1, "SSL_CTX_new returned null"); |
| return -1; |
| } |
| |
| SSL_CTX_set_ecdh_auto (oc->ssl_ctx, 1); |
| SSL_CTX_set_mode (oc->ssl_ctx, SSL_MODE_ENABLE_PARTIAL_WRITE); |
| #ifdef HAVE_OPENSSL_ASYNC |
| if (om->async) |
| SSL_CTX_set_mode (oc->ssl_ctx, SSL_MODE_ASYNC); |
| #endif |
| rv = SSL_CTX_set_cipher_list (oc->ssl_ctx, (const char *) om->ciphers); |
| if (rv != 1) |
| { |
| TLS_DBG (1, "Couldn't set cipher"); |
| return -1; |
| } |
| |
| SSL_CTX_set_options (oc->ssl_ctx, flags); |
| SSL_CTX_set_cert_store (oc->ssl_ctx, om->cert_store); |
| |
| oc->ssl = SSL_new (oc->ssl_ctx); |
| if (oc->ssl == NULL) |
| { |
| TLS_DBG (1, "Couldn't initialize ssl struct"); |
| return -1; |
| } |
| |
| oc->rbio = BIO_new (BIO_s_mem ()); |
| oc->wbio = BIO_new (BIO_s_mem ()); |
| |
| BIO_set_mem_eof_return (oc->rbio, -1); |
| BIO_set_mem_eof_return (oc->wbio, -1); |
| |
| SSL_set_bio (oc->ssl, oc->wbio, oc->rbio); |
| SSL_set_connect_state (oc->ssl); |
| |
| rv = SSL_set_tlsext_host_name (oc->ssl, ctx->srv_hostname); |
| if (rv != 1) |
| { |
| TLS_DBG (1, "Couldn't set hostname"); |
| return -1; |
| } |
| |
| /* |
| * 2. Do the first steps in the handshake. |
| */ |
| TLS_DBG (1, "Initiating handshake for [%u]%u", ctx->c_thread_index, |
| oc->openssl_ctx_index); |
| |
| tls_session = session_get_from_handle (ctx->tls_session_handle); |
| while (1) |
| { |
| rv = SSL_do_handshake (oc->ssl); |
| err = SSL_get_error (oc->ssl, rv); |
| openssl_try_handshake_write (oc, tls_session); |
| #ifdef HAVE_OPENSSL_ASYNC |
| if (err == SSL_ERROR_WANT_ASYNC) |
| { |
| handler = (openssl_resume_handler *) openssl_ctx_handshake_rx; |
| vpp_ssl_async_process_event (ctx, handler); |
| break; |
| } |
| #endif |
| if (err != SSL_ERROR_WANT_WRITE) |
| break; |
| } |
| |
| TLS_DBG (2, "tls state for [%u]%u is su", ctx->c_thread_index, |
| oc->openssl_ctx_index, SSL_state_string_long (oc->ssl)); |
| return 0; |
| } |
| |
| static int |
| openssl_start_listen (tls_ctx_t * lctx) |
| { |
| application_t *app; |
| const SSL_METHOD *method; |
| SSL_CTX *ssl_ctx; |
| int rv; |
| BIO *cert_bio; |
| X509 *srvcert; |
| EVP_PKEY *pkey; |
| u32 olc_index; |
| openssl_listen_ctx_t *olc; |
| app_worker_t *app_wrk; |
| |
| long flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_COMPRESSION; |
| openssl_main_t *om = &openssl_main; |
| |
| app_wrk = app_worker_get (lctx->parent_app_wrk_index); |
| if (!app_wrk) |
| return -1; |
| |
| app = application_get (app_wrk->app_index); |
| if (!app->tls_cert || !app->tls_key) |
| { |
| TLS_DBG (1, "tls cert and/or key not configured %d", |
| lctx->parent_app_wrk_index); |
| return -1; |
| } |
| |
| method = SSLv23_method (); |
| ssl_ctx = SSL_CTX_new (method); |
| if (!ssl_ctx) |
| { |
| clib_warning ("Unable to create SSL context"); |
| return -1; |
| } |
| |
| SSL_CTX_set_mode (ssl_ctx, SSL_MODE_ENABLE_PARTIAL_WRITE); |
| #ifdef HAVE_OPENSSL_ASYNC |
| if (om->async) |
| SSL_CTX_set_mode (ssl_ctx, SSL_MODE_ASYNC); |
| SSL_CTX_set_async_callback (ssl_ctx, tls_async_openssl_callback); |
| #endif |
| SSL_CTX_set_options (ssl_ctx, flags); |
| SSL_CTX_set_ecdh_auto (ssl_ctx, 1); |
| |
| rv = SSL_CTX_set_cipher_list (ssl_ctx, (const char *) om->ciphers); |
| if (rv != 1) |
| { |
| TLS_DBG (1, "Couldn't set cipher"); |
| return -1; |
| } |
| |
| /* |
| * Set the key and cert |
| */ |
| cert_bio = BIO_new (BIO_s_mem ()); |
| BIO_write (cert_bio, app->tls_cert, vec_len (app->tls_cert)); |
| srvcert = PEM_read_bio_X509 (cert_bio, NULL, NULL, NULL); |
| if (!srvcert) |
| { |
| clib_warning ("unable to parse certificate"); |
| return -1; |
| } |
| SSL_CTX_use_certificate (ssl_ctx, srvcert); |
| BIO_free (cert_bio); |
| |
| cert_bio = BIO_new (BIO_s_mem ()); |
| BIO_write (cert_bio, app->tls_key, vec_len (app->tls_key)); |
| pkey = PEM_read_bio_PrivateKey (cert_bio, NULL, NULL, NULL); |
| if (!pkey) |
| { |
| clib_warning ("unable to parse pkey"); |
| return -1; |
| } |
| SSL_CTX_use_PrivateKey (ssl_ctx, pkey); |
| BIO_free (cert_bio); |
| |
| olc_index = openssl_listen_ctx_alloc (); |
| olc = openssl_lctx_get (olc_index); |
| olc->ssl_ctx = ssl_ctx; |
| olc->srvcert = srvcert; |
| olc->pkey = pkey; |
| |
| /* store SSL_CTX into TLS level structure */ |
| lctx->tls_ssl_ctx = olc_index; |
| |
| return 0; |
| |
| } |
| |
| static int |
| openssl_stop_listen (tls_ctx_t * lctx) |
| { |
| u32 olc_index; |
| openssl_listen_ctx_t *olc; |
| |
| olc_index = lctx->tls_ssl_ctx; |
| olc = openssl_lctx_get (olc_index); |
| |
| X509_free (olc->srvcert); |
| EVP_PKEY_free (olc->pkey); |
| |
| SSL_CTX_free (olc->ssl_ctx); |
| openssl_listen_ctx_free (olc); |
| |
| return 0; |
| } |
| |
| static int |
| openssl_ctx_init_server (tls_ctx_t * ctx) |
| { |
| openssl_ctx_t *oc = (openssl_ctx_t *) ctx; |
| u32 olc_index = ctx->tls_ssl_ctx; |
| openssl_listen_ctx_t *olc; |
| session_t *tls_session; |
| int rv, err; |
| #ifdef HAVE_OPENSSL_ASYNC |
| openssl_resume_handler *handler; |
| #endif |
| |
| /* Start a new connection */ |
| |
| olc = openssl_lctx_get (olc_index); |
| oc->ssl = SSL_new (olc->ssl_ctx); |
| if (oc->ssl == NULL) |
| { |
| TLS_DBG (1, "Couldn't initialize ssl struct"); |
| return -1; |
| } |
| |
| oc->rbio = BIO_new (BIO_s_mem ()); |
| oc->wbio = BIO_new (BIO_s_mem ()); |
| |
| BIO_set_mem_eof_return (oc->rbio, -1); |
| BIO_set_mem_eof_return (oc->wbio, -1); |
| |
| SSL_set_bio (oc->ssl, oc->wbio, oc->rbio); |
| SSL_set_accept_state (oc->ssl); |
| |
| TLS_DBG (1, "Initiating handshake for [%u]%u", ctx->c_thread_index, |
| oc->openssl_ctx_index); |
| |
| tls_session = session_get_from_handle (ctx->tls_session_handle); |
| while (1) |
| { |
| rv = SSL_do_handshake (oc->ssl); |
| err = SSL_get_error (oc->ssl, rv); |
| openssl_try_handshake_write (oc, tls_session); |
| #ifdef HAVE_OPENSSL_ASYNC |
| if (err == SSL_ERROR_WANT_ASYNC) |
| { |
| handler = (openssl_resume_handler *) openssl_ctx_handshake_rx; |
| vpp_ssl_async_process_event (ctx, handler); |
| break; |
| } |
| #endif |
| if (err != SSL_ERROR_WANT_WRITE) |
| break; |
| } |
| |
| TLS_DBG (2, "tls state for [%u]%u is su", ctx->c_thread_index, |
| oc->openssl_ctx_index, SSL_state_string_long (oc->ssl)); |
| return 0; |
| } |
| |
| static u8 |
| openssl_handshake_is_over (tls_ctx_t * ctx) |
| { |
| openssl_ctx_t *mc = (openssl_ctx_t *) ctx; |
| if (!mc->ssl) |
| return 0; |
| return SSL_is_init_finished (mc->ssl); |
| } |
| |
| static int |
| openssl_transport_close (tls_ctx_t * ctx) |
| { |
| if (!openssl_handshake_is_over (ctx)) |
| { |
| session_close (session_get_from_handle (ctx->tls_session_handle)); |
| return 0; |
| } |
| session_transport_closing_notify (&ctx->connection); |
| return 0; |
| } |
| |
| static int |
| openssl_app_close (tls_ctx_t * ctx) |
| { |
| tls_disconnect_transport (ctx); |
| session_transport_delete_notify (&ctx->connection); |
| openssl_ctx_free (ctx); |
| return 0; |
| } |
| |
| const static tls_engine_vft_t openssl_engine = { |
| .ctx_alloc = openssl_ctx_alloc, |
| .ctx_free = openssl_ctx_free, |
| .ctx_get = openssl_ctx_get, |
| .ctx_get_w_thread = openssl_ctx_get_w_thread, |
| .ctx_init_server = openssl_ctx_init_server, |
| .ctx_init_client = openssl_ctx_init_client, |
| .ctx_write = openssl_ctx_write, |
| .ctx_read = openssl_ctx_read, |
| .ctx_handshake_is_over = openssl_handshake_is_over, |
| .ctx_start_listen = openssl_start_listen, |
| .ctx_stop_listen = openssl_stop_listen, |
| .ctx_transport_close = openssl_transport_close, |
| .ctx_app_close = openssl_app_close, |
| }; |
| |
| int |
| tls_init_ca_chain (void) |
| { |
| openssl_main_t *om = &openssl_main; |
| tls_main_t *tm = vnet_tls_get_main (); |
| BIO *cert_bio; |
| X509 *testcert; |
| int rv; |
| |
| if (access (tm->ca_cert_path, F_OK | R_OK) == -1) |
| { |
| clib_warning ("Could not initialize TLS CA certificates"); |
| return -1; |
| } |
| |
| if (!(om->cert_store = X509_STORE_new ())) |
| { |
| clib_warning ("failed to create cert store"); |
| return -1; |
| } |
| |
| rv = X509_STORE_load_locations (om->cert_store, tm->ca_cert_path, 0); |
| if (rv < 0) |
| { |
| clib_warning ("failed to load ca certificate"); |
| } |
| |
| if (tm->use_test_cert_in_ca) |
| { |
| cert_bio = BIO_new (BIO_s_mem ()); |
| BIO_write (cert_bio, test_srv_crt_rsa, test_srv_crt_rsa_len); |
| testcert = PEM_read_bio_X509 (cert_bio, NULL, NULL, NULL); |
| if (!testcert) |
| { |
| clib_warning ("unable to parse certificate"); |
| return -1; |
| } |
| X509_STORE_add_cert (om->cert_store, testcert); |
| rv = 0; |
| } |
| return (rv < 0 ? -1 : 0); |
| } |
| |
| static int |
| tls_openssl_set_ciphers (char *ciphers) |
| { |
| openssl_main_t *om = &openssl_main; |
| int i; |
| |
| if (!ciphers) |
| { |
| return -1; |
| } |
| |
| vec_validate (om->ciphers, strlen (ciphers) - 1); |
| for (i = 0; i < vec_len (om->ciphers); i++) |
| { |
| om->ciphers[i] = toupper (ciphers[i]); |
| } |
| |
| return 0; |
| |
| } |
| |
| static clib_error_t * |
| tls_openssl_init (vlib_main_t * vm) |
| { |
| vlib_thread_main_t *vtm = vlib_get_thread_main (); |
| openssl_main_t *om = &openssl_main; |
| clib_error_t *error; |
| u32 num_threads; |
| |
| num_threads = 1 /* main thread */ + vtm->n_threads; |
| |
| if ((error = vlib_call_init_function (vm, tls_init))) |
| return error; |
| |
| SSL_library_init (); |
| SSL_load_error_strings (); |
| |
| if (tls_init_ca_chain ()) |
| { |
| clib_warning ("failed to initialize TLS CA chain"); |
| return 0; |
| } |
| |
| vec_validate (om->ctx_pool, num_threads - 1); |
| |
| tls_register_engine (&openssl_engine, TLS_ENGINE_OPENSSL); |
| |
| om->engine_init = 0; |
| |
| /* default ciphers */ |
| tls_openssl_set_ciphers |
| ("ALL:!ADH:!LOW:!EXP:!MD5:!RC4-SHA:!DES-CBC3-SHA:@STRENGTH"); |
| |
| return 0; |
| } |
| |
| #ifdef HAVE_OPENSSL_ASYNC |
| static clib_error_t * |
| tls_openssl_set_command_fn (vlib_main_t * vm, unformat_input_t * input, |
| vlib_cli_command_t * cmd) |
| { |
| openssl_main_t *om = &openssl_main; |
| char *engine_name = NULL; |
| char *engine_alg = NULL; |
| char *ciphers = NULL; |
| u8 engine_name_set = 0; |
| int i; |
| |
| /* By present, it is not allowed to configure engine again after running */ |
| if (om->engine_init) |
| { |
| clib_warning ("engine has started!\n"); |
| return clib_error_return |
| (0, "engine has started, and no config is accepted"); |
| } |
| |
| while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
| { |
| if (unformat (input, "engine %s", &engine_name)) |
| { |
| engine_name_set = 1; |
| } |
| else if (unformat (input, "async")) |
| { |
| om->async = 1; |
| openssl_async_node_enable_disable (1); |
| } |
| else if (unformat (input, "alg %s", &engine_alg)) |
| { |
| for (i = 0; i < strnlen (engine_alg, MAX_CRYPTO_LEN); i++) |
| engine_alg[i] = toupper (engine_alg[i]); |
| } |
| else if (unformat (input, "ciphers %s", &ciphers)) |
| { |
| tls_openssl_set_ciphers (ciphers); |
| } |
| else |
| return clib_error_return (0, "failed: unknown input `%U'", |
| format_unformat_error, input); |
| } |
| |
| /* reset parameters if engine is not configured */ |
| if (!engine_name_set) |
| { |
| clib_warning ("No engine provided! \n"); |
| om->async = 0; |
| } |
| else |
| { |
| if (!openssl_engine_register (engine_name, engine_alg)) |
| { |
| return clib_error_return (0, "failed to register %s polling", |
| engine_name); |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (tls_openssl_set_command, static) = |
| { |
| .path = "tls openssl set", |
| .short_help = "tls openssl set [engine <engine name>] [alg [algorithm] [async]", |
| .function = tls_openssl_set_command_fn, |
| }; |
| /* *INDENT-ON* */ |
| #endif |
| |
| |
| VLIB_INIT_FUNCTION (tls_openssl_init); |
| |
| /* *INDENT-OFF* */ |
| VLIB_PLUGIN_REGISTER () = { |
| .version = VPP_BUILD_VER, |
| .description = "openssl based TLS Engine", |
| }; |
| /* *INDENT-ON* */ |
| |
| /* |
| * fd.io coding-style-patch-verification: ON |
| * |
| * Local Variables: |
| * eval: (c-set-style "gnu") |
| * End: |
| */ |