[nginx] Proxy: added the "proxy_ssl_protocols" directive.

[Andrei Belov]

details:   http://hg.nginx.org/nginx/rev/7c1f4977d8a0
branches:  
changeset: 5385:7c1f4977d8a0
user:      Andrei Belov <defan at nginx.com>
date:      Thu Sep 19 18:30:33 2013 +0400
description:
Proxy: added the "proxy_ssl_protocols" directive.

diffstat:

 src/http/modules/ngx_http_proxy_module.c |  50 +++++++++++++++++++++++++------
 1 files changed, 40 insertions(+), 10 deletions(-)

diffs (109 lines):

diff -r cfbf1d1cc233 -r 7c1f4977d8a0 src/http/modules/ngx_http_proxy_module.c
--- a/src/http/modules/ngx_http_proxy_module.c	Wed Sep 18 16:51:30 2013 -0700
+++ b/src/http/modules/ngx_http_proxy_module.c	Thu Sep 19 18:30:33 2013 +0400
@@ -76,6 +76,11 @@ typedef struct {
 
     ngx_uint_t                     headers_hash_max_size;
     ngx_uint_t                     headers_hash_bucket_size;
+
+#if (NGX_HTTP_SSL)
+    ngx_uint_t                     ssl;
+    ngx_uint_t                     ssl_protocols;
+#endif
 } ngx_http_proxy_loc_conf_t;
 
 
@@ -186,6 +191,20 @@ static ngx_conf_bitmask_t  ngx_http_prox
 };
 
 
+#if (NGX_HTTP_SSL)
+
+static ngx_conf_bitmask_t  ngx_http_proxy_ssl_protocols[] = {
+    { ngx_string("SSLv2"), NGX_SSL_SSLv2 },
+    { ngx_string("SSLv3"), NGX_SSL_SSLv3 },
+    { ngx_string("TLSv1"), NGX_SSL_TLSv1 },
+    { ngx_string("TLSv1.1"), NGX_SSL_TLSv1_1 },
+    { ngx_string("TLSv1.2"), NGX_SSL_TLSv1_2 },
+    { ngx_null_string, 0 }
+};
+
+#endif
+
+
 static ngx_conf_enum_t  ngx_http_proxy_http_version[] = {
     { ngx_string("1.0"), NGX_HTTP_VERSION_10 },
     { ngx_string("1.1"), NGX_HTTP_VERSION_11 },
@@ -512,6 +531,13 @@ static ngx_command_t  ngx_http_proxy_com
       offsetof(ngx_http_proxy_loc_conf_t, upstream.ssl_session_reuse),
       NULL },
 
+    { ngx_string("proxy_ssl_protocols"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
+      ngx_conf_set_bitmask_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_proxy_loc_conf_t, ssl_protocols),
+      &ngx_http_proxy_ssl_protocols },
+
 #endif
 
       ngx_null_command
@@ -2386,6 +2412,8 @@ ngx_http_proxy_create_loc_conf(ngx_conf_
      *     conf->body_set = NULL;
      *     conf->body_source = { 0, NULL };
      *     conf->redirects = NULL;
+     *     conf->ssl = 0;
+     *     conf->ssl_protocols = 0;
      */
 
     conf->upstream.store = NGX_CONF_UNSET;
@@ -2701,6 +2729,15 @@ ngx_http_proxy_merge_loc_conf(ngx_conf_t
 #if (NGX_HTTP_SSL)
     ngx_conf_merge_value(conf->upstream.ssl_session_reuse,
                               prev->upstream.ssl_session_reuse, 1);
+
+    ngx_conf_merge_bitmask_value(conf->ssl_protocols, prev->ssl_protocols,
+                                 (NGX_CONF_BITMASK_SET|NGX_SSL_SSLv3
+                                  |NGX_SSL_TLSv1|NGX_SSL_TLSv1_1
+                                  |NGX_SSL_TLSv1_2));
+
+    if (conf->ssl && ngx_http_proxy_set_ssl(cf, conf) != NGX_OK) {
+        return NGX_CONF_ERROR;
+    }
 #endif
 
     ngx_conf_merge_value(conf->redirect, prev->redirect, 1);
@@ -3146,9 +3183,7 @@ ngx_http_proxy_pass(ngx_conf_t *cf, ngx_
         }
 
 #if (NGX_HTTP_SSL)
-        if (ngx_http_proxy_set_ssl(cf, plcf) != NGX_OK) {
-            return NGX_CONF_ERROR;
-        }
+        plcf->ssl = 1;
 #endif
 
         return NGX_CONF_OK;
@@ -3161,9 +3196,7 @@ ngx_http_proxy_pass(ngx_conf_t *cf, ngx_
     } else if (ngx_strncasecmp(url->data, (u_char *) "https://", 8) == 0) {
 
 #if (NGX_HTTP_SSL)
-        if (ngx_http_proxy_set_ssl(cf, plcf) != NGX_OK) {
-            return NGX_CONF_ERROR;
-        }
+        plcf->ssl = 1;
 
         add = 8;
         port = 443;
@@ -3745,10 +3778,7 @@ ngx_http_proxy_set_ssl(ngx_conf_t *cf, n
 
     plcf->upstream.ssl->log = cf->log;
 
-    if (ngx_ssl_create(plcf->upstream.ssl,
-                       NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1
-                                    |NGX_SSL_TLSv1_1|NGX_SSL_TLSv1_2,
-                       NULL)
+    if (ngx_ssl_create(plcf->upstream.ssl, plcf->ssl_protocols, NULL)
         != NGX_OK)
     {
         return NGX_ERROR;