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SNI: added restriction on requesting host other than negotiated. According to RFC 6066, client is not supposed to request a different server name at the application layer. Server implementations that rely upon these names being equal must validate that a client did not send a different name in HTTP request. Current versions of Apache HTTP server always return 400 "Bad Request" in such cases. There exist implementations however (e.g., SPDY) that rely on being able to request different host names in one connection. Given this, we only reject requests with differing host names if verification of client certificates is enabled in a corresponding server configuration. An example of configuration that might not work as expected: server { listen 433 ssl default; return 404; } server { listen 433 ssl; server_name example.org; ssl_client_certificate org.cert; ssl_verify_client on; } server { listen 433 ssl; server_name example.com; ssl_client_certificate com.cert; ssl_verify_client on; } Previously, a client was able to request example.com by presenting a certificate for example.org, and vice versa.
author Valentin Bartenev <vbart@nginx.com>
date Wed, 27 Feb 2013 17:41:34 +0000
parents 4a804fd04e6c
children 1356a3b96924
line wrap: on
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_HTTP_SSL_H_INCLUDED_
#define _NGX_HTTP_SSL_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>


typedef struct {
    ngx_flag_t                      enable;

    ngx_ssl_t                       ssl;

    ngx_flag_t                      prefer_server_ciphers;

    ngx_uint_t                      protocols;

    ngx_uint_t                      verify;
    ngx_uint_t                      verify_depth;

    ssize_t                         builtin_session_cache;

    time_t                          session_timeout;

    ngx_str_t                       certificate;
    ngx_str_t                       certificate_key;
    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;

    ngx_shm_zone_t                 *shm_zone;

    ngx_flag_t                      stapling;
    ngx_flag_t                      stapling_verify;
    ngx_str_t                       stapling_file;
    ngx_str_t                       stapling_responder;

    u_char                         *file;
    ngx_uint_t                      line;
} ngx_http_ssl_srv_conf_t;


extern ngx_module_t  ngx_http_ssl_module;


#endif /* _NGX_HTTP_SSL_H_INCLUDED_ */