2017-10-18 09:41:44 +08:00
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/*
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* libwebsockets - mbedTLS-specific lws apis
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*
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2019-01-13 06:58:21 +08:00
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* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
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2017-10-18 09:41:44 +08:00
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation:
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* version 2.1 of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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2018-05-03 10:49:36 +08:00
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#include "core/private.h"
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2018-12-31 20:35:54 +08:00
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#include "tls/mbedtls/private.h"
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2017-10-18 09:41:44 +08:00
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LWS_VISIBLE void
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lws_ssl_destroy(struct lws_vhost *vhost)
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{
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if (!lws_check_opt(vhost->context->options,
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LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT))
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return;
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2018-05-01 12:41:42 +08:00
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if (vhost->tls.ssl_ctx)
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SSL_CTX_free(vhost->tls.ssl_ctx);
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if (!vhost->tls.user_supplied_ssl_ctx && vhost->tls.ssl_client_ctx)
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SSL_CTX_free(vhost->tls.ssl_client_ctx);
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2017-10-18 09:41:44 +08:00
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2018-05-01 12:41:42 +08:00
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if (vhost->tls.x509_client_CA)
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X509_free(vhost->tls.x509_client_CA);
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2017-10-18 09:41:44 +08:00
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}
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LWS_VISIBLE int
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lws_ssl_capable_read(struct lws *wsi, unsigned char *buf, int len)
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{
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struct lws_context *context = wsi->context;
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struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
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int n = 0, m;
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2018-05-01 12:41:42 +08:00
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if (!wsi->tls.ssl)
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2017-10-18 09:41:44 +08:00
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return lws_ssl_capable_read_no_ssl(wsi, buf, len);
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2019-08-10 07:32:32 +01:00
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lws_stats_bump(pt, LWSSTATS_C_API_READ, 1);
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2017-10-18 09:41:44 +08:00
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errno = 0;
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2018-05-01 12:41:42 +08:00
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n = SSL_read(wsi->tls.ssl, buf, len);
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2017-10-18 09:41:44 +08:00
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#if defined(LWS_WITH_ESP32)
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2018-09-05 14:45:10 +08:00
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if (!n && errno == LWS_ENOTCONN) {
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2017-10-18 09:41:44 +08:00
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lwsl_debug("%p: SSL_read ENOTCONN\n", wsi);
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return LWS_SSL_CAPABLE_ERROR;
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}
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#endif
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#if defined(LWS_WITH_STATS)
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2018-08-25 06:38:28 +08:00
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if (!wsi->seen_rx && wsi->accept_start_us) {
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2019-08-10 07:32:32 +01:00
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lws_stats_bump(pt, LWSSTATS_US_SSL_RX_DELAY_AVG,
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lws_now_usecs() - wsi->accept_start_us);
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lws_stats_bump(pt, LWSSTATS_C_SSL_CONNS_HAD_RX, 1);
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2017-10-18 09:41:44 +08:00
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wsi->seen_rx = 1;
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}
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#endif
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lwsl_debug("%p: SSL_read says %d\n", wsi, n);
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/* manpage: returning 0 means connection shut down */
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if (!n) {
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wsi->socket_is_permanently_unusable = 1;
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return LWS_SSL_CAPABLE_ERROR;
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}
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if (n < 0) {
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2018-05-01 12:41:42 +08:00
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m = SSL_get_error(wsi->tls.ssl, n);
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2017-10-18 09:41:44 +08:00
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lwsl_debug("%p: ssl err %d errno %d\n", wsi, m, errno);
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2019-03-14 12:05:35 +01:00
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if (errno == LWS_ENOTCONN) {
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/* If the socket isn't connected anymore, bail out. */
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wsi->socket_is_permanently_unusable = 1;
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return LWS_SSL_CAPABLE_ERROR;
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}
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2017-10-18 09:41:44 +08:00
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if (m == SSL_ERROR_ZERO_RETURN ||
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m == SSL_ERROR_SYSCALL)
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return LWS_SSL_CAPABLE_ERROR;
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2018-05-01 12:41:42 +08:00
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if (m == SSL_ERROR_WANT_READ || SSL_want_read(wsi->tls.ssl)) {
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2017-10-18 09:41:44 +08:00
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lwsl_debug("%s: WANT_READ\n", __func__);
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lwsl_debug("%p: LWS_SSL_CAPABLE_MORE_SERVICE\n", wsi);
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return LWS_SSL_CAPABLE_MORE_SERVICE;
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}
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2018-05-01 12:41:42 +08:00
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if (m == SSL_ERROR_WANT_WRITE || SSL_want_write(wsi->tls.ssl)) {
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2017-10-18 09:41:44 +08:00
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lwsl_debug("%s: WANT_WRITE\n", __func__);
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lwsl_debug("%p: LWS_SSL_CAPABLE_MORE_SERVICE\n", wsi);
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return LWS_SSL_CAPABLE_MORE_SERVICE;
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}
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wsi->socket_is_permanently_unusable = 1;
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return LWS_SSL_CAPABLE_ERROR;
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}
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2019-08-10 07:32:32 +01:00
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lws_stats_bump(pt, LWSSTATS_B_READ, n);
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2017-10-18 09:41:44 +08:00
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if (wsi->vhost)
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wsi->vhost->conn_stats.rx += n;
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/*
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* if it was our buffer that limited what we read,
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* check if SSL has additional data pending inside SSL buffers.
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*
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* Because these won't signal at the network layer with POLLIN
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* and if we don't realize, this data will sit there forever
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*/
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if (n != len)
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goto bail;
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2018-05-01 12:41:42 +08:00
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if (!wsi->tls.ssl)
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2017-10-18 09:41:44 +08:00
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goto bail;
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2018-11-05 14:43:50 +08:00
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if (SSL_pending(wsi->tls.ssl) &&
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2019-08-08 16:58:55 +01:00
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lws_dll2_is_detached(&wsi->tls.dll_pending_tls))
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lws_dll2_add_head(&wsi->tls.dll_pending_tls,
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&pt->tls.dll_pending_tls_owner);
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2017-10-18 09:41:44 +08:00
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return n;
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bail:
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lws_ssl_remove_wsi_from_buffered_list(wsi);
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return n;
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}
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LWS_VISIBLE int
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lws_ssl_pending(struct lws *wsi)
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{
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2018-05-01 12:41:42 +08:00
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if (!wsi->tls.ssl)
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2017-10-18 09:41:44 +08:00
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return 0;
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2018-05-01 12:41:42 +08:00
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return SSL_pending(wsi->tls.ssl);
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2017-10-18 09:41:44 +08:00
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}
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LWS_VISIBLE int
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lws_ssl_capable_write(struct lws *wsi, unsigned char *buf, int len)
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{
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int n, m;
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2018-05-01 12:41:42 +08:00
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if (!wsi->tls.ssl)
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2017-10-18 09:41:44 +08:00
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return lws_ssl_capable_write_no_ssl(wsi, buf, len);
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2018-05-01 12:41:42 +08:00
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n = SSL_write(wsi->tls.ssl, buf, len);
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2017-10-18 09:41:44 +08:00
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if (n > 0)
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return n;
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2018-05-01 12:41:42 +08:00
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m = SSL_get_error(wsi->tls.ssl, n);
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2017-10-18 09:41:44 +08:00
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if (m != SSL_ERROR_SYSCALL) {
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2018-05-01 12:41:42 +08:00
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if (m == SSL_ERROR_WANT_READ || SSL_want_read(wsi->tls.ssl)) {
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2017-10-18 09:41:44 +08:00
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lwsl_notice("%s: want read\n", __func__);
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return LWS_SSL_CAPABLE_MORE_SERVICE;
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}
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2018-05-01 12:41:42 +08:00
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if (m == SSL_ERROR_WANT_WRITE || SSL_want_write(wsi->tls.ssl)) {
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2017-10-18 09:41:44 +08:00
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lws_set_blocking_send(wsi);
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http: compression methods
Add generic http compression layer eanbled at cmake with LWS_WITH_HTTP_STREAM_COMPRESSION.
This is wholly a feature of the HTTP role (used by h1 and h2 roles) and doesn't exist
outside that context.
Currently provides 'deflate' and 'br' compression methods for server side only.
'br' requires also -DLWS_WITH_HTTP_BROTLI=1 at cmake and the brotli libraries (available in
your distro already) and dev package.
Other compression methods can be added nicely using an ops struct.
The built-in file serving stuff will use this is the client says he can handle it, and the
mimetype of the file either starts with "text/" (html and css etc) or is the mimetype of
Javascript.
zlib allocates quite a bit while in use, it seems to be around 256KiB per stream. So this
is only useful on relatively strong servers with lots of memory. However for some usecases
where you are serving a lot of css and js assets, it's a nice help.
The patch performs special treatment for http/1.1 pipelining, since the compression is
performed on the fly the compressed content-length is not known until the end. So for h1
only, chunked transfer-encoding is automatically added so pipelining can continue of the
connection.
For h2 the chunking is neither supported nor required, so it "just works".
User code can also request to add a compression transform before the reply headers were
sent using the new api
LWS_VISIBLE int
lws_http_compression_apply(struct lws *wsi, const char *name,
unsigned char **p, unsigned char *end, char decomp);
... this allows transparent compression of dynamically generated HTTP. The requested
compression (eg, "deflate") is only applied if the client headers indicated it was
supported, otherwise it's a NOP.
Name may be NULL in which case the first compression method in the internal table at
stream.c that is mentioned as acceptable by the client will be used.
NOTE: the compression translation, same as h2 support, relies on the user code using
LWS_WRITE_HTTP and then LWS_WRITE_HTTP_FINAL on the last part written. The internal
lws fileserving code already does this.
2018-09-02 14:43:05 +08:00
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lwsl_debug("%s: want write\n", __func__);
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2017-10-18 09:41:44 +08:00
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return LWS_SSL_CAPABLE_MORE_SERVICE;
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}
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}
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lwsl_debug("%s failed: %d\n",__func__, m);
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wsi->socket_is_permanently_unusable = 1;
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return LWS_SSL_CAPABLE_ERROR;
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}
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int openssl_SSL_CTX_private_data_index;
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void
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lws_ssl_info_callback(const SSL *ssl, int where, int ret)
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{
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struct lws *wsi;
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struct lws_context *context;
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struct lws_ssl_info si;
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context = (struct lws_context *)SSL_CTX_get_ex_data(
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SSL_get_SSL_CTX(ssl),
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openssl_SSL_CTX_private_data_index);
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if (!context)
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return;
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wsi = wsi_from_fd(context, SSL_get_fd(ssl));
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if (!wsi)
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return;
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2018-05-01 12:41:42 +08:00
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if (!(where & wsi->vhost->tls.ssl_info_event_mask))
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2017-10-18 09:41:44 +08:00
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return;
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si.where = where;
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si.ret = ret;
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if (user_callback_handle_rxflow(wsi->protocol->callback,
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wsi, LWS_CALLBACK_SSL_INFO,
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wsi->user_space, &si, 0))
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lws_set_timeout(wsi, PENDING_TIMEOUT_KILLED_BY_SSL_INFO, -1);
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}
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LWS_VISIBLE int
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lws_ssl_close(struct lws *wsi)
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{
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lws_sockfd_type n;
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2018-05-01 12:41:42 +08:00
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if (!wsi->tls.ssl)
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2017-10-18 09:41:44 +08:00
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return 0; /* not handled */
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#if defined (LWS_HAVE_SSL_SET_INFO_CALLBACK)
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/* kill ssl callbacks, becausse we will remove the fd from the
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* table linking it to the wsi
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*/
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2018-05-01 12:41:42 +08:00
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if (wsi->vhost->tls.ssl_info_event_mask)
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SSL_set_info_callback(wsi->tls.ssl, NULL);
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2017-10-18 09:41:44 +08:00
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#endif
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2018-05-01 12:41:42 +08:00
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n = SSL_get_fd(wsi->tls.ssl);
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2017-10-18 09:41:44 +08:00
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if (!wsi->socket_is_permanently_unusable)
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2018-05-01 12:41:42 +08:00
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SSL_shutdown(wsi->tls.ssl);
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2017-10-18 09:41:44 +08:00
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compatible_close(n);
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2018-05-01 12:41:42 +08:00
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SSL_free(wsi->tls.ssl);
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wsi->tls.ssl = NULL;
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2017-10-18 09:41:44 +08:00
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2018-04-02 11:55:17 +08:00
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if (!lwsi_role_client(wsi) &&
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2017-11-26 09:22:42 +08:00
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wsi->context->simultaneous_ssl_restriction &&
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2017-10-18 09:41:44 +08:00
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wsi->context->simultaneous_ssl-- ==
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wsi->context->simultaneous_ssl_restriction)
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/* we made space and can do an accept */
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lws_gate_accepts(wsi->context, 1);
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2017-11-26 09:22:42 +08:00
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2017-10-18 09:41:44 +08:00
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#if defined(LWS_WITH_STATS)
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wsi->context->updated = 1;
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#endif
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return 1; /* handled */
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}
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void
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lws_ssl_SSL_CTX_destroy(struct lws_vhost *vhost)
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{
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2018-05-01 12:41:42 +08:00
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if (vhost->tls.ssl_ctx)
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SSL_CTX_free(vhost->tls.ssl_ctx);
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2017-10-18 09:41:44 +08:00
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2018-05-01 12:41:42 +08:00
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if (!vhost->tls.user_supplied_ssl_ctx && vhost->tls.ssl_client_ctx)
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SSL_CTX_free(vhost->tls.ssl_client_ctx);
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2017-11-14 11:25:54 +08:00
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#if defined(LWS_WITH_ACME)
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2017-10-28 11:33:34 +08:00
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lws_tls_acme_sni_cert_destroy(vhost);
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2017-11-14 11:25:54 +08:00
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#endif
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2017-10-18 09:41:44 +08:00
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}
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void
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lws_ssl_context_destroy(struct lws_context *context)
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{
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}
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lws_tls_ctx *
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lws_tls_ctx_from_wsi(struct lws *wsi)
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|
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{
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2018-05-01 12:41:42 +08:00
|
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if (!wsi->tls.ssl)
|
2018-02-27 07:48:25 +08:00
|
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return NULL;
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2018-05-01 12:41:42 +08:00
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return SSL_get_SSL_CTX(wsi->tls.ssl);
|
2017-10-18 09:41:44 +08:00
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}
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enum lws_ssl_capable_status
|
2018-03-11 11:26:06 +08:00
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__lws_tls_shutdown(struct lws *wsi)
|
2017-10-18 09:41:44 +08:00
|
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|
{
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2018-05-01 12:41:42 +08:00
|
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int n = SSL_shutdown(wsi->tls.ssl);
|
2017-10-18 09:41:44 +08:00
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lwsl_debug("SSL_shutdown=%d for fd %d\n", n, wsi->desc.sockfd);
|
|
|
|
|
|
|
|
switch (n) {
|
|
|
|
case 1: /* successful completion */
|
|
|
|
n = shutdown(wsi->desc.sockfd, SHUT_WR);
|
|
|
|
return LWS_SSL_CAPABLE_DONE;
|
|
|
|
|
|
|
|
case 0: /* needs a retry */
|
2018-03-11 11:26:06 +08:00
|
|
|
__lws_change_pollfd(wsi, 0, LWS_POLLIN);
|
2017-10-18 09:41:44 +08:00
|
|
|
return LWS_SSL_CAPABLE_MORE_SERVICE;
|
|
|
|
|
|
|
|
default: /* fatal error, or WANT */
|
2018-05-01 12:41:42 +08:00
|
|
|
n = SSL_get_error(wsi->tls.ssl, n);
|
2017-10-18 09:41:44 +08:00
|
|
|
if (n != SSL_ERROR_SYSCALL && n != SSL_ERROR_SSL) {
|
2018-05-01 12:41:42 +08:00
|
|
|
if (SSL_want_read(wsi->tls.ssl)) {
|
2017-10-18 09:41:44 +08:00
|
|
|
lwsl_debug("(wants read)\n");
|
2018-03-11 11:26:06 +08:00
|
|
|
__lws_change_pollfd(wsi, 0, LWS_POLLIN);
|
2017-10-18 09:41:44 +08:00
|
|
|
return LWS_SSL_CAPABLE_MORE_SERVICE_READ;
|
|
|
|
}
|
2018-05-01 12:41:42 +08:00
|
|
|
if (SSL_want_write(wsi->tls.ssl)) {
|
2017-10-18 09:41:44 +08:00
|
|
|
lwsl_debug("(wants write)\n");
|
2018-03-11 11:26:06 +08:00
|
|
|
__lws_change_pollfd(wsi, 0, LWS_POLLOUT);
|
2017-10-18 09:41:44 +08:00
|
|
|
return LWS_SSL_CAPABLE_MORE_SERVICE_WRITE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return LWS_SSL_CAPABLE_ERROR;
|
|
|
|
}
|
|
|
|
}
|
2017-10-26 09:54:25 +08:00
|
|
|
|
2018-05-01 12:41:42 +08:00
|
|
|
|
|
|
|
static int
|
|
|
|
tops_fake_POLLIN_for_buffered_mbedtls(struct lws_context_per_thread *pt)
|
|
|
|
{
|
|
|
|
return lws_tls_fake_POLLIN_for_buffered(pt);
|
|
|
|
}
|
|
|
|
|
|
|
|
const struct lws_tls_ops tls_ops_mbedtls = {
|
|
|
|
/* fake_POLLIN_for_buffered */ tops_fake_POLLIN_for_buffered_mbedtls,
|
|
|
|
};
|