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|
/*
* 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:
*/
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