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SSL: ssl_conf_command directive. With the ssl_conf_command directive it is now possible to set arbitrary OpenSSL configuration parameters as long as nginx is compiled with OpenSSL 1.0.2 or later. Full list of available configuration commands can be found in the SSL_CONF_cmd manual page (https://www.openssl.org/docs/man1.1.1/man3/SSL_CONF_cmd.html). In particular, this allows configuring PrioritizeChaCha option (ticket #1445): ssl_conf_command Options PrioritizeChaCha; It can be also used to configure TLSv1.3 ciphers in OpenSSL, which fails to configure them via the SSL_CTX_set_cipher_list() interface (ticket #1529): ssl_conf_command Ciphersuites TLS_CHACHA20_POLY1305_SHA256; Configuration commands are applied after nginx own configuration for SSL, so they can be used to override anything set by nginx. Note though that configuring OpenSSL directly with ssl_conf_command might result in a behaviour nginx does not expect, and should be done with care.
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 22 Oct 2020 18:00:22 +0300
parents 7f955d3b9a0d
children 0aaa09927703
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_MAIL_SSL_H_INCLUDED_
#define _NGX_MAIL_SSL_H_INCLUDED_


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


#define NGX_MAIL_STARTTLS_OFF   0
#define NGX_MAIL_STARTTLS_ON    1
#define NGX_MAIL_STARTTLS_ONLY  2


typedef struct {
    ngx_flag_t       enable;
    ngx_flag_t       prefer_server_ciphers;

    ngx_ssl_t        ssl;

    ngx_uint_t       starttls;
    ngx_uint_t       listen;
    ngx_uint_t       protocols;

    ngx_uint_t       verify;
    ngx_uint_t       verify_depth;

    ssize_t          builtin_session_cache;

    time_t           session_timeout;

    ngx_array_t     *certificates;
    ngx_array_t     *certificate_keys;

    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_array_t     *passwords;
    ngx_array_t     *conf_commands;

    ngx_shm_zone_t  *shm_zone;

    ngx_flag_t       session_tickets;
    ngx_array_t     *session_ticket_keys;

    u_char          *file;
    ngx_uint_t       line;
} ngx_mail_ssl_conf_t;


extern ngx_module_t  ngx_mail_ssl_module;


#endif /* _NGX_MAIL_SSL_H_INCLUDED_ */