vpp - Vector Packet Processing

Age	Commit message (Expand)	Author	Files	Lines
2016-06-07	Rebase DPDK patches	Damjan Marion	1	-0/+32

/* * 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)); 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); if (SSL_is_server (oc->ssl)) { X509_free (oc->srvcert); EVP_PKEY_free (oc->pkey); } SSL_free (oc->ssl); 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 int openssl_try_handshake_read (openssl_ctx_t * oc, stream_session_t * tls_session) { u32 deq_max, deq_now; svm_fifo_t *f; int wrote, rv; f = tls_session->server_rx_fifo; deq_max = svm_fifo_max_dequeue (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, stream_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->server_tx_fifo; enq_max = svm_fifo_max_enqueue (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_evt (f, FIFO_EVENT_APP_TX); 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 (oc->ssl, (void *) engine_cb->callback, (void *) engine_cb->arg); TLS_DBG ("set callback to engine %p\n", engine_cb->callback); } /* associated fd with context for return */ TLS_DBG ("completed assoicated fd with tls session\n"); return 0; } #endif int openssl_ctx_handshake_rx (tls_ctx_t * ctx, stream_session_t * tls_session) { openssl_ctx_t *oc = (openssl_ctx_t *) ctx; int rv = 0, err; #ifdef HAVE_OPENSSL_ASYNC 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; } 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) { myself = openssl_ctx_handshake_rx; vpp_ssl_async_process_event (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, stream_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; stream_session_t *tls_session; svm_fifo_t *f; f = app_session->server_tx_fifo; deq_max = svm_fifo_max_dequeue (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_evt (app_session->server_tx_fifo, FIFO_EVENT_APP_TX); goto check_tls_fifo; } svm_fifo_dequeue_drop (app_session->server_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->server_tx_fifo, rv); wrote += rv; } } if (deq_now < deq_max) tls_add_vpp_q_evt (app_session->server_tx_fifo, FIFO_EVENT_APP_TX); 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->server_tx_fifo; enq_max = svm_fifo_max_enqueue (f); if (!enq_max) { tls_add_vpp_q_evt (app_session->server_tx_fifo, FIFO_EVENT_APP_TX); 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_evt (app_session->server_tx_fifo, FIFO_EVENT_APP_TX); return wrote; } svm_fifo_enqueue_nocopy (f, read); tls_add_vpp_q_evt (f, FIFO_EVENT_APP_TX); 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_evt (app_session->server_tx_fifo, FIFO_EVENT_APP_TX); return wrote; } static inline int openssl_ctx_read (tls_ctx_t * ctx, stream_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; stream_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->server_rx_fifo; deq_max = svm_fifo_max_dequeue (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_evt (tls_session->server_rx_fifo, FIFO_EVENT_BUILTIN_RX); 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 (f)) tls_add_vpp_q_evt (tls_session->server_rx_fifo, FIFO_EVENT_BUILTIN_RX); 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->server_rx_fifo; enq_max = svm_fifo_max_enqueue (f); if (!enq_max) { tls_add_vpp_q_evt (tls_session->server_rx_fifo, FIFO_EVENT_BUILTIN_RX); 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_evt (tls_session->server_rx_fifo, FIFO_EVENT_BUILTIN_RX); 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_evt (tls_session->server_rx_fifo, FIFO_EVENT_BUILTIN_RX); return wrote; } static int openssl_ctx_init_client (tls_ctx_t * ctx) { char *ciphers = "ALL:!ADH:!LOW:!EXP:!MD5:!RC4-SHA:!DES-CBC3-SHA:@STRENGTH"; 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; stream_session_t *tls_session; const SSL_METHOD *method; int rv, err; 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); rv = SSL_CTX_set_cipher_list (oc->ssl_ctx, (const char *) 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); 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_ctx_init_server (tls_ctx_t * ctx) { char *ciphers = "ALL:!ADH:!LOW:!EXP:!MD5:!RC4-SHA:!DES-CBC3-SHA:@STRENGTH"; long flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_COMPRESSION; openssl_ctx_t *oc = (openssl_ctx_t *) ctx; stream_session_t *tls_session; const SSL_METHOD *method; application_t *app; int rv, err; BIO *cert_bio; #ifdef HAVE_OPENSSL_ASYNC openssl_main_t *om = &openssl_main; openssl_resume_handler *handler; #endif app = application_get (ctx->parent_app_index); if (!app->tls_cert || !app->tls_key) { TLS_DBG (1, "tls cert and/or key not configured %d", ctx->parent_app_index); return -1; } method = SSLv23_method (); oc->ssl_ctx = SSL_CTX_new (method); if (!oc->ssl_ctx) { clib_warning ("Unable to create SSL context"); return -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 SSL_CTX_set_options (oc->ssl_ctx, flags); SSL_CTX_set_ecdh_auto (oc->ssl_ctx, 1); rv = SSL_CTX_set_cipher_list (oc->ssl_ctx, (const char *) 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)); oc->srvcert = PEM_read_bio_X509 (cert_bio, NULL, NULL, NULL); if (!oc->srvcert) { clib_warning ("unable to parse certificate"); return -1; } SSL_CTX_use_certificate (oc->ssl_ctx, oc->srvcert); BIO_free (cert_bio); cert_bio = BIO_new (BIO_s_mem ()); BIO_write (cert_bio, app->tls_key, vec_len (app->tls_key)); oc->pkey = PEM_read_bio_PrivateKey (cert_bio, NULL, NULL, NULL); if (!oc->pkey) { clib_warning ("unable to parse pkey"); return -1; } SSL_CTX_use_PrivateKey (oc->ssl_ctx, oc->pkey); SSL_CTX_use_PrivateKey (oc->ssl_ctx, oc->pkey); BIO_free (cert_bio); /* Start a new connection */ 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_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); } 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, }; 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 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; 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; 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 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: */