# HG changeset patch
# User Maxim Dounin <mdounin@mdounin.ru>
# Date 1551620942 -10800
# Node ID 3f1db95d758ab6b331065e99df47666bb1ed5e06
# Parent  8981dbb12254a667070be1151aaa2a982180d589
SSL: use of the SSL_OP_NO_CLIENT_RENEGOTIATION option.

The SSL_OP_NO_CLIENT_RENEGOTIATION option was introduced in LibreSSL 2.5.1.
Unlike OpenSSL's SSL_OP_NO_RENEGOTIATION, it only disables client-initiated
renegotiation, and hence can be safely used on all SSL contexts.

diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
--- a/src/event/ngx_event_openssl.c
+++ b/src/event/ngx_event_openssl.c
@@ -368,6 +368,10 @@ ngx_ssl_create(ngx_ssl_t *ssl, ngx_uint_
     SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_ANTI_REPLAY);
 #endif
 
+#ifdef SSL_OP_NO_CLIENT_RENEGOTIATION
+    SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_CLIENT_RENEGOTIATION);
+#endif
+
 #ifdef SSL_MODE_RELEASE_BUFFERS
     SSL_CTX_set_mode(ssl->ctx, SSL_MODE_RELEASE_BUFFERS);
 #endif