From b0d8ff55a1560f4f373319075cd452992de8c74b Mon Sep 17 00:00:00 2001 From: Maxim Dounin Date: Mon, 23 Mar 2015 02:42:32 +0300 Subject: [PATCH] SSL: clear protocol options. LibreSSL 2.1.1+ started to set SSL_OP_NO_SSLv3 option by default on new contexts. This makes sure to clear it to make it possible to use SSLv3 with LibreSSL if enabled in nginx config. Prodded by Kuramoto Eiji. --- src/event/ngx_event_openssl.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c index f8e4fab4b..83186f582 100644 --- a/src/event/ngx_event_openssl.c +++ b/src/event/ngx_event_openssl.c @@ -249,6 +249,12 @@ ngx_ssl_create(ngx_ssl_t *ssl, ngx_uint_t protocols, void *data) SSL_CTX_set_options(ssl->ctx, SSL_OP_SINGLE_DH_USE); +#ifdef SSL_CTRL_CLEAR_OPTIONS + /* only in 0.9.8m+ */ + SSL_CTX_clear_options(ssl->ctx, + SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TLSv1); +#endif + if (!(protocols & NGX_SSL_SSLv2)) { SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_SSLv2); } @@ -259,11 +265,13 @@ ngx_ssl_create(ngx_ssl_t *ssl, ngx_uint_t protocols, void *data) SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_TLSv1); } #ifdef SSL_OP_NO_TLSv1_1 + SSL_CTX_clear_options(ssl->ctx, SSL_OP_NO_TLSv1_1); if (!(protocols & NGX_SSL_TLSv1_1)) { SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_TLSv1_1); } #endif #ifdef SSL_OP_NO_TLSv1_2 + SSL_CTX_clear_options(ssl->ctx, SSL_OP_NO_TLSv1_2); if (!(protocols & NGX_SSL_TLSv1_2)) { SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_TLSv1_2); }