# HG changeset patch
# User Sergey Kandaurov <pluknet@nginx.com>
# Date 1600951889 -3600
# Node ID eb940fe579cf4fb74abbb651e05c347d98a9babc
# Parent  526dddf637bb3ea8dc59354c25cb927bb28a510f
SSL: abort handshake on SSL_set_SSL_CTX() errors.

In rare cases, such as memory allocation failure, SSL_set_SSL_CTX() returns
NULL, which could mean that a different SSL configuration has not been set.
Note that this new behaviour seemingly originated in OpenSSL-1.1.0 release.

diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -932,7 +932,10 @@ ngx_http_ssl_servername(ngx_ssl_conn_t *
     c->ssl->buffer_size = sscf->buffer_size;
 
     if (sscf->ssl.ctx) {
-        SSL_set_SSL_CTX(ssl_conn, sscf->ssl.ctx);
+        if (SSL_set_SSL_CTX(ssl_conn, sscf->ssl.ctx) == NULL) {
+            *ad = SSL_AD_INTERNAL_ERROR;
+            return SSL_TLSEXT_ERR_ALERT_FATAL;
+        }
 
         /*
          * SSL_set_SSL_CTX() only changes certs as of 1.0.0d