# HG changeset patch
# User Maxim Dounin <mdounin@mdounin.ru>
# Date 1445278958 -10800
# Node ID 60ae7596958804ddb6cb6411017254252ccc2aeb
# Parent  50169ef2f3feb96ed3a29c1af4fc42cdc8a6691f
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) {
@@ -2303,7 +2305,7 @@ 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;
@@ -2441,21 +2443,17 @@ 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;
@@ -2834,13 +2832,14 @@ 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) {
@@ -2849,10 +2848,6 @@ 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;