# HG changeset patch
# User Maxim Dounin <mdounin@mdounin.ru>
# Date 1445278958 -10800
# Node ID 97f102a13f3373ed27d1d0d8f78ac9af8d88a0ff
# Parent  0e37389c0bd5ef2341fbfc297b5d59215306b9dd
SSL: preserve default server context in connection (ticket #235).

This context is needed for shared sessions cache to work in configurations
with multiple virtual servers sharing the same port.  Unfortunately, OpenSSL
does not provide an API to access the session context, thus storing it
separately.

In collaboration with Vladimir Homutov.

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
@@ -1038,6 +1038,8 @@ ngx_ssl_create_connection(ngx_ssl_t *ssl
     sc->buffer = ((flags & NGX_SSL_BUFFER) != 0);
     sc->buffer_size = ssl->buffer_size;
 
+    sc->session_ctx = ssl->ctx;
+
     sc->connection = SSL_new(ssl->ctx);
 
     if (sc->connection == NULL) {
@@ -2305,7 +2307,7 @@ ngx_ssl_new_session(ngx_ssl_conn_t *ssl_
 
     c = ngx_ssl_get_connection(ssl_conn);
 
-    ssl_ctx = SSL_get_SSL_CTX(ssl_conn);
+    ssl_ctx = c->ssl->session_ctx;
     shm_zone = SSL_CTX_get_ex_data(ssl_ctx, ngx_ssl_session_cache_index);
 
     cache = shm_zone->data;
@@ -2443,21 +2445,17 @@ ngx_ssl_get_cached_session(ngx_ssl_conn_
     ngx_ssl_sess_id_t        *sess_id;
     ngx_ssl_session_cache_t  *cache;
     u_char                    buf[NGX_SSL_MAX_SESSION_SIZE];
-#if (NGX_DEBUG)
     ngx_connection_t         *c;
-#endif
 
     hash = ngx_crc32_short(id, (size_t) len);
     *copy = 0;
 
-#if (NGX_DEBUG)
     c = ngx_ssl_get_connection(ssl_conn);
 
     ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
                    "ssl get session: %08XD:%d", hash, len);
-#endif
-
-    shm_zone = SSL_CTX_get_ex_data(SSL_get_SSL_CTX(ssl_conn),
+
+    shm_zone = SSL_CTX_get_ex_data(c->ssl->session_ctx,
                                    ngx_ssl_session_cache_index);
 
     cache = shm_zone->data;
@@ -2836,13 +2834,14 @@ ngx_ssl_session_ticket_key_callback(ngx_
     SSL_CTX                       *ssl_ctx;
     ngx_uint_t                     i;
     ngx_array_t                   *keys;
+    ngx_connection_t              *c;
     ngx_ssl_session_ticket_key_t  *key;
 #if (NGX_DEBUG)
     u_char                         buf[32];
-    ngx_connection_t              *c;
 #endif
 
-    ssl_ctx = SSL_get_SSL_CTX(ssl_conn);
+    c = ngx_ssl_get_connection(ssl_conn);
+    ssl_ctx = c->ssl->session_ctx;
 
     keys = SSL_CTX_get_ex_data(ssl_ctx, ngx_ssl_session_ticket_keys_index);
     if (keys == NULL) {
@@ -2851,10 +2850,6 @@ ngx_ssl_session_ticket_key_callback(ngx_
 
     key = keys->elts;
 
-#if (NGX_DEBUG)
-    c = ngx_ssl_get_connection(ssl_conn);
-#endif
-
     if (enc == 1) {
         /* encrypt session ticket */
 
diff --git a/src/event/ngx_event_openssl.h b/src/event/ngx_event_openssl.h
--- a/src/event/ngx_event_openssl.h
+++ b/src/event/ngx_event_openssl.h
@@ -46,6 +46,7 @@ typedef struct {
 
 typedef struct {
     ngx_ssl_conn_t             *connection;
+    SSL_CTX                    *session_ctx;
 
     ngx_int_t                   last;
     ngx_buf_t                  *buf;