Author: mdounin
Date: 2012-10-01 12:39:36 +0000 (Mon, 01 Oct 2012)
New Revision: 4873
URL: http://trac.nginx.org/nginx/changeset/4873/nginx

Log:
OCSP stapling: ssl_trusted_certificate directive.

The directive allows to specify additional trusted Certificate Authority
certificates to be used during certificate verification. In contrast to
ssl_client_certificate DNs of these cerificates aren't sent to a client
during handshake.

Trusted certificates are loaded regardless of the fact whether client
certificates verification is enabled as the same certificates will be
used for OCSP stapling, during construction of an OCSP request and for
verification of an OCSP response.

The same applies to a CRL (which is now always loaded).


Modified:
trunk/src/event/ngx_event_openssl.c
trunk/src/event/ngx_event_openssl.h
trunk/src/http/modules/ngx_http_ssl_module.c
trunk/src/http/modules/ngx_http_ssl_module.h

Modified: trunk/src/event/ngx_event_openssl.c
===================================================================
--- trunk/src/event/ngx_event_openssl.c 2012-09-28 18:28:38 UTC (rev 4872)
+++ trunk/src/event/ngx_event_openssl.c 2012-10-01 12:39:36 UTC (rev 4873)
@@ -297,6 +297,33 @@


ngx_int_t
+ngx_ssl_trusted_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert,
+ ngx_int_t depth)
+{
+ SSL_CTX_set_verify_depth(ssl->ctx, depth);
+
+ if (cert->len == 0) {
+ return NGX_OK;
+ }
+
+ if (ngx_conf_full_name(cf->cycle, cert, 1) != NGX_OK) {
+ return NGX_ERROR;
+ }
+
+ if (SSL_CTX_load_verify_locations(ssl->ctx, (char *) cert->data, NULL)
+ == 0)
+ {
+ ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
+ "SSL_CTX_load_verify_locations(\"%s\") failed",
+ cert->data);
+ return NGX_ERROR;
+ }
+
+ return NGX_OK;
+}
+
+
+ngx_int_t
ngx_ssl_crl(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *crl)
{
X509_STORE *store;

Modified: trunk/src/event/ngx_event_openssl.h
===================================================================
--- trunk/src/event/ngx_event_openssl.h 2012-09-28 18:28:38 UTC (rev 4872)
+++ trunk/src/event/ngx_event_openssl.h 2012-10-01 12:39:36 UTC (rev 4873)
@@ -101,6 +101,8 @@
ngx_str_t *cert, ngx_str_t *key);
ngx_int_t ngx_ssl_client_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl,
ngx_str_t *cert, ngx_int_t depth);
+ngx_int_t ngx_ssl_trusted_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl,
+ ngx_str_t *cert, ngx_int_t depth);
ngx_int_t ngx_ssl_crl(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *crl);
RSA *ngx_ssl_rsa512_key_callback(SSL *ssl, int is_export, int key_length);
ngx_int_t ngx_ssl_dhparam(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *file);

Modified: trunk/src/http/modules/ngx_http_ssl_module.c
===================================================================
--- trunk/src/http/modules/ngx_http_ssl_module.c 2012-09-28 18:28:38 UTC (rev 4872)
+++ trunk/src/http/modules/ngx_http_ssl_module.c 2012-10-01 12:39:36 UTC (rev 4873)
@@ -124,6 +124,13 @@
offsetof(ngx_http_ssl_srv_conf_t, client_certificate),
NULL },

+ { ngx_string("ssl_trusted_certificate"),
+ NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_str_slot,
+ NGX_HTTP_SRV_CONF_OFFSET,
+ offsetof(ngx_http_ssl_srv_conf_t, trusted_certificate),
+ NULL },
+
{ ngx_string("ssl_prefer_server_ciphers"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
@@ -325,6 +332,7 @@
* sscf->dhparam = { 0, NULL };
* sscf->ecdh_curve = { 0, NULL };
* sscf->client_certificate = { 0, NULL };
+ * sscf->trusted_certificate = { 0, NULL };
* sscf->crl = { 0, NULL };
* sscf->ciphers = { 0, NULL };
* sscf->shm_zone = NULL;
@@ -380,6 +388,8 @@

ngx_conf_merge_str_value(conf->client_certificate, prev->client_certificate,
"");
+ ngx_conf_merge_str_value(conf->trusted_certificate,
+ prev->trusted_certificate, "");
ngx_conf_merge_str_value(conf->crl, prev->crl, "");

ngx_conf_merge_str_value(conf->ecdh_curve, prev->ecdh_curve,
@@ -479,12 +489,20 @@
{
return NGX_CONF_ERROR;
}
+ }

- if (ngx_ssl_crl(cf, &conf->ssl, &conf->crl) != NGX_OK) {
- return NGX_CONF_ERROR;
- }
+ if (ngx_ssl_trusted_certificate(cf, &conf->ssl,
+ &conf->trusted_certificate,
+ conf->verify_depth)
+ != NGX_OK)
+ {
+ return NGX_CONF_ERROR;
}

+ if (ngx_ssl_crl(cf, &conf->ssl, &conf->crl) != NGX_OK) {
+ return NGX_CONF_ERROR;
+ }
+
if (conf->prefer_server_ciphers) {
SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
}

Modified: trunk/src/http/modules/ngx_http_ssl_module.h
===================================================================
--- trunk/src/http/modules/ngx_http_ssl_module.h 2012-09-28 18:28:38 UTC (rev 4872)
+++ trunk/src/http/modules/ngx_http_ssl_module.h 2012-10-01 12:39:36 UTC (rev 4873)
@@ -35,6 +35,7 @@
ngx_str_t dhparam;
ngx_str_t ecdh_curve;
ngx_str_t client_certificate;
+ ngx_str_t trusted_certificate;
ngx_str_t crl;

ngx_str_t ciphers;

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