view src/http/modules/ngx_http_ssl_module.c @ 9263:388a801e9bb9 default tip

Request body: discarded body now treated as no body. Notably, proxying of such requests now uses no Content-Length instead of "Content-Length: 0", and the $content_length variable is empty (instead of "0"). This might be beneficial from correctness point of view, since requests with discarded body, such as during processing of error pages, do not pretend there is a zero-length body, but instead do not contain body at all. For example, this might be important for PUT requests, where a zero-length body could be incorrectly interpreted as a real request body. This also slightly simplifies the code.
author Maxim Dounin <mdounin@mdounin.ru>
date Sat, 27 Apr 2024 18:23:52 +0300
parents 0aaa09927703
children
line wrap: on
line source


/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


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

#if (NGX_QUIC_OPENSSL_COMPAT)
#include <ngx_event_quic_openssl_compat.h>
#endif


typedef ngx_int_t (*ngx_ssl_variable_handler_pt)(ngx_connection_t *c,
    ngx_pool_t *pool, ngx_str_t *s);


#define NGX_DEFAULT_CIPHERS     "HIGH:!aNULL:!MD5"
#define NGX_DEFAULT_ECDH_CURVE  "auto"

#define NGX_HTTP_ALPN_PROTOS    "\x08http/1.1\x08http/1.0\x08http/0.9"


#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
static int ngx_http_ssl_alpn_select(ngx_ssl_conn_t *ssl_conn,
    const unsigned char **out, unsigned char *outlen,
    const unsigned char *in, unsigned int inlen, void *arg);
#endif

static ngx_int_t ngx_http_ssl_static_variable(ngx_http_request_t *r,
    ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_ssl_variable(ngx_http_request_t *r,
    ngx_http_variable_value_t *v, uintptr_t data);

static ngx_int_t ngx_http_ssl_add_variables(ngx_conf_t *cf);
static void *ngx_http_ssl_create_srv_conf(ngx_conf_t *cf);
static char *ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf,
    void *parent, void *child);

static ngx_int_t ngx_http_ssl_compile_certificates(ngx_conf_t *cf,
    ngx_http_ssl_srv_conf_t *conf);

static char *ngx_http_ssl_password_file(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
static char *ngx_http_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
static char *ngx_http_ssl_ocsp_cache(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);

static char *ngx_http_ssl_conf_command_check(ngx_conf_t *cf, void *post,
    void *data);

static ngx_int_t ngx_http_ssl_init(ngx_conf_t *cf);
#if (NGX_QUIC_OPENSSL_COMPAT)
static ngx_int_t ngx_http_ssl_quic_compat_init(ngx_conf_t *cf,
    ngx_http_conf_addr_t *addr);
#endif


static ngx_conf_bitmask_t  ngx_http_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_string("TLSv1.3"), NGX_SSL_TLSv1_3 },
    { ngx_null_string, 0 }
};


static ngx_conf_enum_t  ngx_http_ssl_verify[] = {
    { ngx_string("off"), 0 },
    { ngx_string("on"), 1 },
    { ngx_string("optional"), 2 },
    { ngx_string("optional_no_ca"), 3 },
    { ngx_null_string, 0 }
};


static ngx_conf_enum_t  ngx_http_ssl_ocsp[] = {
    { ngx_string("off"), 0 },
    { ngx_string("on"), 1 },
    { ngx_string("leaf"), 2 },
    { ngx_null_string, 0 }
};


static ngx_conf_post_t  ngx_http_ssl_conf_command_post =
    { ngx_http_ssl_conf_command_check };


static ngx_command_t  ngx_http_ssl_commands[] = {

    { ngx_string("ssl_certificate"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_str_array_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, certificates),
      NULL },

    { ngx_string("ssl_certificate_key"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_str_array_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, certificate_keys),
      NULL },

    { ngx_string("ssl_password_file"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
      ngx_http_ssl_password_file,
      NGX_HTTP_SRV_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("ssl_dhparam"),
      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, dhparam),
      NULL },

    { ngx_string("ssl_ecdh_curve"),
      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, ecdh_curve),
      NULL },

    { ngx_string("ssl_protocols"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
      ngx_conf_set_bitmask_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, protocols),
      &ngx_http_ssl_protocols },

    { ngx_string("ssl_ciphers"),
      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, ciphers),
      NULL },

    { ngx_string("ssl_buffer_size"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_size_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, buffer_size),
      NULL },

    { ngx_string("ssl_verify_client"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_enum_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, verify),
      &ngx_http_ssl_verify },

    { ngx_string("ssl_verify_depth"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_num_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, verify_depth),
      NULL },

    { ngx_string("ssl_client_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, 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,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, prefer_server_ciphers),
      NULL },

    { ngx_string("ssl_session_cache"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE12,
      ngx_http_ssl_session_cache,
      NGX_HTTP_SRV_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("ssl_session_tickets"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, session_tickets),
      NULL },

    { ngx_string("ssl_session_ticket_key"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_str_array_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, session_ticket_keys),
      NULL },

    { ngx_string("ssl_session_timeout"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_sec_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, session_timeout),
      NULL },

    { ngx_string("ssl_crl"),
      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, crl),
      NULL },

    { ngx_string("ssl_ocsp"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
      ngx_conf_set_enum_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, ocsp),
      &ngx_http_ssl_ocsp },

    { ngx_string("ssl_ocsp_responder"),
      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, ocsp_responder),
      NULL },

    { ngx_string("ssl_ocsp_cache"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
      ngx_http_ssl_ocsp_cache,
      NGX_HTTP_SRV_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("ssl_stapling"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, stapling),
      NULL },

    { ngx_string("ssl_stapling_file"),
      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, stapling_file),
      NULL },

    { ngx_string("ssl_stapling_responder"),
      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, stapling_responder),
      NULL },

    { ngx_string("ssl_stapling_verify"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, stapling_verify),
      NULL },

    { ngx_string("ssl_early_data"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, early_data),
      NULL },

    { ngx_string("ssl_conf_command"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE2,
      ngx_conf_set_keyval_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, conf_commands),
      &ngx_http_ssl_conf_command_post },

    { ngx_string("ssl_reject_handshake"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_ssl_srv_conf_t, reject_handshake),
      NULL },

      ngx_null_command
};


static ngx_http_module_t  ngx_http_ssl_module_ctx = {
    ngx_http_ssl_add_variables,            /* preconfiguration */
    ngx_http_ssl_init,                     /* postconfiguration */

    NULL,                                  /* create main configuration */
    NULL,                                  /* init main configuration */

    ngx_http_ssl_create_srv_conf,          /* create server configuration */
    ngx_http_ssl_merge_srv_conf,           /* merge server configuration */

    NULL,                                  /* create location configuration */
    NULL                                   /* merge location configuration */
};


ngx_module_t  ngx_http_ssl_module = {
    NGX_MODULE_V1,
    &ngx_http_ssl_module_ctx,              /* module context */
    ngx_http_ssl_commands,                 /* module directives */
    NGX_HTTP_MODULE,                       /* module type */
    NULL,                                  /* init master */
    NULL,                                  /* init module */
    NULL,                                  /* init process */
    NULL,                                  /* init thread */
    NULL,                                  /* exit thread */
    NULL,                                  /* exit process */
    NULL,                                  /* exit master */
    NGX_MODULE_V1_PADDING
};


static ngx_http_variable_t  ngx_http_ssl_vars[] = {

    { ngx_string("ssl_protocol"), NULL, ngx_http_ssl_static_variable,
      (uintptr_t) ngx_ssl_get_protocol, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_cipher"), NULL, ngx_http_ssl_static_variable,
      (uintptr_t) ngx_ssl_get_cipher_name, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_ciphers"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_ciphers, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_curve"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_curve, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_curves"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_curves, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_session_id"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_session_id, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_session_reused"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_session_reused, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_early_data"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_early_data,
      NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE, 0 },

    { ngx_string("ssl_server_name"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_server_name, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_alpn_protocol"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_alpn_protocol, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_client_cert"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_certificate, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_client_raw_cert"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_raw_certificate,
      NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_client_escaped_cert"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_escaped_certificate,
      NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_client_s_dn"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_subject_dn, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_client_i_dn"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_issuer_dn, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_client_s_dn_legacy"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_subject_dn_legacy, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_client_i_dn_legacy"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_issuer_dn_legacy, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_client_serial"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_serial_number, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_client_fingerprint"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_fingerprint, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_client_verify"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_client_verify, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_client_v_start"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_client_v_start, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_client_v_end"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_client_v_end, NGX_HTTP_VAR_CHANGEABLE, 0 },

    { ngx_string("ssl_client_v_remain"), NULL, ngx_http_ssl_variable,
      (uintptr_t) ngx_ssl_get_client_v_remain, NGX_HTTP_VAR_CHANGEABLE, 0 },

      ngx_http_null_variable
};


static ngx_str_t ngx_http_ssl_sess_id_ctx = ngx_string("HTTP");


#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation

static int
ngx_http_ssl_alpn_select(ngx_ssl_conn_t *ssl_conn, const unsigned char **out,
    unsigned char *outlen, const unsigned char *in, unsigned int inlen,
    void *arg)
{
    unsigned int             srvlen;
    unsigned char           *srv;
#if (NGX_DEBUG)
    unsigned int             i;
#endif
#if (NGX_HTTP_V2 || NGX_HTTP_V3)
    ngx_http_connection_t   *hc;
#endif
#if (NGX_HTTP_V2)
    ngx_http_v2_srv_conf_t  *h2scf;
#endif
#if (NGX_HTTP_V3)
    ngx_http_v3_srv_conf_t  *h3scf;
#endif
#if (NGX_HTTP_V2 || NGX_HTTP_V3 || NGX_DEBUG)
    ngx_connection_t        *c;

    c = ngx_ssl_get_connection(ssl_conn);
#endif

#if (NGX_DEBUG)
    for (i = 0; i < inlen; i += in[i] + 1) {
        ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
                       "SSL ALPN supported by client: %*s",
                       (size_t) in[i], &in[i + 1]);
    }
#endif

#if (NGX_HTTP_V2 || NGX_HTTP_V3)
    hc = c->data;
#endif

#if (NGX_HTTP_V3)
    if (hc->addr_conf->quic) {

        h3scf = ngx_http_get_module_srv_conf(hc->conf_ctx, ngx_http_v3_module);

        if (h3scf->enable && h3scf->enable_hq) {
            srv = (unsigned char *) NGX_HTTP_V3_ALPN_PROTO
                                    NGX_HTTP_V3_HQ_ALPN_PROTO;
            srvlen = sizeof(NGX_HTTP_V3_ALPN_PROTO NGX_HTTP_V3_HQ_ALPN_PROTO)
                     - 1;

        } else if (h3scf->enable_hq) {
            srv = (unsigned char *) NGX_HTTP_V3_HQ_ALPN_PROTO;
            srvlen = sizeof(NGX_HTTP_V3_HQ_ALPN_PROTO) - 1;

        } else if (h3scf->enable) {
            srv = (unsigned char *) NGX_HTTP_V3_ALPN_PROTO;
            srvlen = sizeof(NGX_HTTP_V3_ALPN_PROTO) - 1;

        } else {
            return SSL_TLSEXT_ERR_ALERT_FATAL;
        }

    } else
#endif
    {
#if (NGX_HTTP_V2)
        h2scf = ngx_http_get_module_srv_conf(hc->conf_ctx, ngx_http_v2_module);

        if (h2scf->enable || hc->addr_conf->http2) {
            srv = (unsigned char *) NGX_HTTP_V2_ALPN_PROTO NGX_HTTP_ALPN_PROTOS;
            srvlen = sizeof(NGX_HTTP_V2_ALPN_PROTO NGX_HTTP_ALPN_PROTOS) - 1;

        } else
#endif
        {
            srv = (unsigned char *) NGX_HTTP_ALPN_PROTOS;
            srvlen = sizeof(NGX_HTTP_ALPN_PROTOS) - 1;
        }
    }

    if (SSL_select_next_proto((unsigned char **) out, outlen, srv, srvlen,
                              in, inlen)
        != OPENSSL_NPN_NEGOTIATED)
    {
        return SSL_TLSEXT_ERR_ALERT_FATAL;
    }

    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
                   "SSL ALPN selected: %*s", (size_t) *outlen, *out);

    return SSL_TLSEXT_ERR_OK;
}

#endif


static ngx_int_t
ngx_http_ssl_static_variable(ngx_http_request_t *r,
    ngx_http_variable_value_t *v, uintptr_t data)
{
    ngx_ssl_variable_handler_pt  handler = (ngx_ssl_variable_handler_pt) data;

    size_t     len;
    ngx_str_t  s;

    if (r->connection->ssl) {

        (void) handler(r->connection, NULL, &s);

        v->data = s.data;

        for (len = 0; v->data[len]; len++) { /* void */ }

        v->len = len;
        v->valid = 1;
        v->no_cacheable = 0;
        v->not_found = 0;

        return NGX_OK;
    }

    v->not_found = 1;

    return NGX_OK;
}


static ngx_int_t
ngx_http_ssl_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
    uintptr_t data)
{
    ngx_ssl_variable_handler_pt  handler = (ngx_ssl_variable_handler_pt) data;

    ngx_str_t  s;

    if (r->connection->ssl) {

        if (handler(r->connection, r->pool, &s) != NGX_OK) {
            return NGX_ERROR;
        }

        v->len = s.len;
        v->data = s.data;

        if (v->len) {
            v->valid = 1;
            v->no_cacheable = 0;
            v->not_found = 0;

            return NGX_OK;
        }
    }

    v->not_found = 1;

    return NGX_OK;
}


static ngx_int_t
ngx_http_ssl_add_variables(ngx_conf_t *cf)
{
    ngx_http_variable_t  *var, *v;

    for (v = ngx_http_ssl_vars; v->name.len; v++) {
        var = ngx_http_add_variable(cf, &v->name, v->flags);
        if (var == NULL) {
            return NGX_ERROR;
        }

        var->get_handler = v->get_handler;
        var->data = v->data;
    }

    return NGX_OK;
}


static void *
ngx_http_ssl_create_srv_conf(ngx_conf_t *cf)
{
    ngx_http_ssl_srv_conf_t  *sscf;

    sscf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssl_srv_conf_t));
    if (sscf == NULL) {
        return NULL;
    }

    /*
     * set by ngx_pcalloc():
     *
     *     sscf->protocols = 0;
     *     sscf->certificate_values = NULL;
     *     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;
     *     sscf->ocsp_responder = { 0, NULL };
     *     sscf->stapling_file = { 0, NULL };
     *     sscf->stapling_responder = { 0, NULL };
     */

    sscf->prefer_server_ciphers = NGX_CONF_UNSET;
    sscf->early_data = NGX_CONF_UNSET;
    sscf->reject_handshake = NGX_CONF_UNSET;
    sscf->buffer_size = NGX_CONF_UNSET_SIZE;
    sscf->verify = NGX_CONF_UNSET_UINT;
    sscf->verify_depth = NGX_CONF_UNSET_UINT;
    sscf->certificates = NGX_CONF_UNSET_PTR;
    sscf->certificate_keys = NGX_CONF_UNSET_PTR;
    sscf->passwords = NGX_CONF_UNSET_PTR;
    sscf->conf_commands = NGX_CONF_UNSET_PTR;
    sscf->builtin_session_cache = NGX_CONF_UNSET;
    sscf->session_timeout = NGX_CONF_UNSET;
    sscf->session_tickets = NGX_CONF_UNSET;
    sscf->session_ticket_keys = NGX_CONF_UNSET_PTR;
    sscf->ocsp = NGX_CONF_UNSET_UINT;
    sscf->ocsp_cache_zone = NGX_CONF_UNSET_PTR;
    sscf->stapling = NGX_CONF_UNSET;
    sscf->stapling_verify = NGX_CONF_UNSET;

    return sscf;
}


static char *
ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
{
    ngx_http_ssl_srv_conf_t *prev = parent;
    ngx_http_ssl_srv_conf_t *conf = child;

    ngx_pool_cleanup_t  *cln;

    ngx_conf_merge_value(conf->session_timeout,
                         prev->session_timeout, 300);

    ngx_conf_merge_value(conf->prefer_server_ciphers,
                         prev->prefer_server_ciphers, 0);

    ngx_conf_merge_value(conf->early_data, prev->early_data, 0);
    ngx_conf_merge_value(conf->reject_handshake, prev->reject_handshake, 0);

    ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols,
                         (NGX_CONF_BITMASK_SET
                          |NGX_SSL_TLSv1|NGX_SSL_TLSv1_1
                          |NGX_SSL_TLSv1_2|NGX_SSL_TLSv1_3));

    ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size,
                         NGX_SSL_BUFSIZE);

    ngx_conf_merge_uint_value(conf->verify, prev->verify, 0);
    ngx_conf_merge_uint_value(conf->verify_depth, prev->verify_depth, 1);

    ngx_conf_merge_ptr_value(conf->certificates, prev->certificates, NULL);
    ngx_conf_merge_ptr_value(conf->certificate_keys, prev->certificate_keys,
                         NULL);

    ngx_conf_merge_ptr_value(conf->passwords, prev->passwords, NULL);

    ngx_conf_merge_str_value(conf->dhparam, prev->dhparam, "");

    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,
                         NGX_DEFAULT_ECDH_CURVE);

    ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFAULT_CIPHERS);

    ngx_conf_merge_ptr_value(conf->conf_commands, prev->conf_commands, NULL);

    ngx_conf_merge_uint_value(conf->ocsp, prev->ocsp, 0);
    ngx_conf_merge_str_value(conf->ocsp_responder, prev->ocsp_responder, "");
    ngx_conf_merge_ptr_value(conf->ocsp_cache_zone,
                         prev->ocsp_cache_zone, NULL);

    ngx_conf_merge_value(conf->stapling, prev->stapling, 0);
    ngx_conf_merge_value(conf->stapling_verify, prev->stapling_verify, 0);
    ngx_conf_merge_str_value(conf->stapling_file, prev->stapling_file, "");
    ngx_conf_merge_str_value(conf->stapling_responder,
                         prev->stapling_responder, "");

    conf->ssl.log = cf->log;

    if (conf->certificates) {

        if (conf->certificate_keys == NULL
            || conf->certificate_keys->nelts < conf->certificates->nelts)
        {
            ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
                          "no \"ssl_certificate_key\" is defined "
                          "for certificate \"%V\"",
                          ((ngx_str_t *) conf->certificates->elts)
                          + conf->certificates->nelts - 1);
            return NGX_CONF_ERROR;
        }

    } else if (!conf->reject_handshake) {
        return NGX_CONF_OK;
    }

    if (ngx_ssl_create(&conf->ssl, conf->protocols, conf) != NGX_OK) {
        return NGX_CONF_ERROR;
    }

    cln = ngx_pool_cleanup_add(cf->pool, 0);
    if (cln == NULL) {
        ngx_ssl_cleanup_ctx(&conf->ssl);
        return NGX_CONF_ERROR;
    }

    cln->handler = ngx_ssl_cleanup_ctx;
    cln->data = &conf->ssl;

#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME

    if (SSL_CTX_set_tlsext_servername_callback(conf->ssl.ctx,
                                               ngx_http_ssl_servername)
        == 0)
    {
        ngx_log_error(NGX_LOG_WARN, cf->log, 0,
            "nginx was built with SNI support, however, now it is linked "
            "dynamically to an OpenSSL library which has no tlsext support, "
            "therefore SNI is not available");
    }

#endif

#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
    SSL_CTX_set_alpn_select_cb(conf->ssl.ctx, ngx_http_ssl_alpn_select, NULL);
#endif

    if (ngx_ssl_ciphers(cf, &conf->ssl, &conf->ciphers,
                        conf->prefer_server_ciphers)
        != NGX_OK)
    {
        return NGX_CONF_ERROR;
    }

    if (ngx_http_ssl_compile_certificates(cf, conf) != NGX_OK) {
        return NGX_CONF_ERROR;
    }

    if (conf->certificate_values) {

#ifdef SSL_R_CERT_CB_ERROR

        /* install callback to lookup certificates */

        SSL_CTX_set_cert_cb(conf->ssl.ctx, ngx_http_ssl_certificate, conf);

#else
        ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
                      "variables in "
                      "\"ssl_certificate\" and \"ssl_certificate_key\" "
                      "directives are not supported on this platform");
        return NGX_CONF_ERROR;
#endif

    } else if (conf->certificates) {

        /* configure certificates */

        if (ngx_ssl_certificates(cf, &conf->ssl, conf->certificates,
                                 conf->certificate_keys, conf->passwords)
            != NGX_OK)
        {
            return NGX_CONF_ERROR;
        }
    }

    conf->ssl.buffer_size = conf->buffer_size;

    if (conf->verify) {

        if (conf->client_certificate.len == 0 && conf->verify != 3) {
            ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
                          "no ssl_client_certificate for ssl_verify_client");
            return NGX_CONF_ERROR;
        }

        if (ngx_ssl_client_certificate(cf, &conf->ssl,
                                       &conf->client_certificate,
                                       conf->verify_depth)
            != 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->ocsp) {

        if (conf->verify == 3) {
            ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
                          "\"ssl_ocsp\" is incompatible with "
                          "\"ssl_verify_client optional_no_ca\"");
            return NGX_CONF_ERROR;
        }

        if (ngx_ssl_ocsp(cf, &conf->ssl, &conf->ocsp_responder, conf->ocsp,
                         conf->ocsp_cache_zone)
            != NGX_OK)
        {
            return NGX_CONF_ERROR;
        }
    }

    if (ngx_ssl_dhparam(cf, &conf->ssl, &conf->dhparam) != NGX_OK) {
        return NGX_CONF_ERROR;
    }

    if (ngx_ssl_ecdh_curve(cf, &conf->ssl, &conf->ecdh_curve) != NGX_OK) {
        return NGX_CONF_ERROR;
    }

    ngx_conf_merge_value(conf->builtin_session_cache,
                         prev->builtin_session_cache, NGX_SSL_NONE_SCACHE);

    if (conf->shm_zone == NULL) {
        conf->shm_zone = prev->shm_zone;
    }

    if (ngx_ssl_session_cache(&conf->ssl, &ngx_http_ssl_sess_id_ctx,
                              conf->certificates, conf->builtin_session_cache,
                              conf->shm_zone, conf->session_timeout)
        != NGX_OK)
    {
        return NGX_CONF_ERROR;
    }

    ngx_conf_merge_value(conf->session_tickets, prev->session_tickets, 1);

#ifdef SSL_OP_NO_TICKET
    if (!conf->session_tickets) {
        SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_NO_TICKET);
    }
#endif

    ngx_conf_merge_ptr_value(conf->session_ticket_keys,
                         prev->session_ticket_keys, NULL);

    if (ngx_ssl_session_ticket_keys(cf, &conf->ssl, conf->session_ticket_keys)
        != NGX_OK)
    {
        return NGX_CONF_ERROR;
    }

    if (conf->stapling) {

        if (ngx_ssl_stapling(cf, &conf->ssl, &conf->stapling_file,
                             &conf->stapling_responder, conf->stapling_verify)
            != NGX_OK)
        {
            return NGX_CONF_ERROR;
        }

    }

    if (ngx_ssl_early_data(cf, &conf->ssl, conf->early_data) != NGX_OK) {
        return NGX_CONF_ERROR;
    }

    if (ngx_ssl_conf_commands(cf, &conf->ssl, conf->conf_commands) != NGX_OK) {
        return NGX_CONF_ERROR;
    }

    return NGX_CONF_OK;
}


static ngx_int_t
ngx_http_ssl_compile_certificates(ngx_conf_t *cf,
    ngx_http_ssl_srv_conf_t *conf)
{
    ngx_str_t                         *cert, *key;
    ngx_uint_t                         i, nelts;
    ngx_http_complex_value_t          *cv;
    ngx_http_compile_complex_value_t   ccv;

    if (conf->certificates == NULL) {
        return NGX_OK;
    }

    cert = conf->certificates->elts;
    key = conf->certificate_keys->elts;
    nelts = conf->certificates->nelts;

    for (i = 0; i < nelts; i++) {

        if (ngx_http_script_variables_count(&cert[i])) {
            goto found;
        }

        if (ngx_http_script_variables_count(&key[i])) {
            goto found;
        }
    }

    return NGX_OK;

found:

    conf->certificate_values = ngx_array_create(cf->pool, nelts,
                                             sizeof(ngx_http_complex_value_t));
    if (conf->certificate_values == NULL) {
        return NGX_ERROR;
    }

    conf->certificate_key_values = ngx_array_create(cf->pool, nelts,
                                             sizeof(ngx_http_complex_value_t));
    if (conf->certificate_key_values == NULL) {
        return NGX_ERROR;
    }

    for (i = 0; i < nelts; i++) {

        cv = ngx_array_push(conf->certificate_values);
        if (cv == NULL) {
            return NGX_ERROR;
        }

        ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));

        ccv.cf = cf;
        ccv.value = &cert[i];
        ccv.complex_value = cv;
        ccv.zero = 1;

        if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
            return NGX_ERROR;
        }

        cv = ngx_array_push(conf->certificate_key_values);
        if (cv == NULL) {
            return NGX_ERROR;
        }

        ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));

        ccv.cf = cf;
        ccv.value = &key[i];
        ccv.complex_value = cv;
        ccv.zero = 1;

        if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
            return NGX_ERROR;
        }
    }

    conf->passwords = ngx_ssl_preserve_passwords(cf, conf->passwords);
    if (conf->passwords == NULL) {
        return NGX_ERROR;
    }

    return NGX_OK;
}


static char *
ngx_http_ssl_password_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
    ngx_http_ssl_srv_conf_t *sscf = conf;

    ngx_str_t  *value;

    if (sscf->passwords != NGX_CONF_UNSET_PTR) {
        return "is duplicate";
    }

    value = cf->args->elts;

    sscf->passwords = ngx_ssl_read_password_file(cf, &value[1]);

    if (sscf->passwords == NULL) {
        return NGX_CONF_ERROR;
    }

    return NGX_CONF_OK;
}


static char *
ngx_http_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
    ngx_http_ssl_srv_conf_t *sscf = conf;

    size_t       len;
    ngx_str_t   *value, name, size;
    ngx_int_t    n;
    ngx_uint_t   i, j;

    value = cf->args->elts;

    for (i = 1; i < cf->args->nelts; i++) {

        if (ngx_strcmp(value[i].data, "off") == 0) {
            sscf->builtin_session_cache = NGX_SSL_NO_SCACHE;
            continue;
        }

        if (ngx_strcmp(value[i].data, "none") == 0) {
            sscf->builtin_session_cache = NGX_SSL_NONE_SCACHE;
            continue;
        }

        if (ngx_strcmp(value[i].data, "builtin") == 0) {
            sscf->builtin_session_cache = NGX_SSL_DFLT_BUILTIN_SCACHE;
            continue;
        }

        if (value[i].len > sizeof("builtin:") - 1
            && ngx_strncmp(value[i].data, "builtin:", sizeof("builtin:") - 1)
               == 0)
        {
            n = ngx_atoi(value[i].data + sizeof("builtin:") - 1,
                         value[i].len - (sizeof("builtin:") - 1));

            if (n == NGX_ERROR) {
                goto invalid;
            }

            sscf->builtin_session_cache = n;

            continue;
        }

        if (value[i].len > sizeof("shared:") - 1
            && ngx_strncmp(value[i].data, "shared:", sizeof("shared:") - 1)
               == 0)
        {
            len = 0;

            for (j = sizeof("shared:") - 1; j < value[i].len; j++) {
                if (value[i].data[j] == ':') {
                    break;
                }

                len++;
            }

            if (len == 0 || j == value[i].len) {
                goto invalid;
            }

            name.len = len;
            name.data = value[i].data + sizeof("shared:") - 1;

            size.len = value[i].len - j - 1;
            size.data = name.data + len + 1;

            n = ngx_parse_size(&size);

            if (n == NGX_ERROR) {
                goto invalid;
            }

            if (n < (ngx_int_t) (8 * ngx_pagesize)) {
                ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                                   "session cache \"%V\" is too small",
                                   &value[i]);

                return NGX_CONF_ERROR;
            }

            sscf->shm_zone = ngx_shared_memory_add(cf, &name, n,
                                                   &ngx_http_ssl_module);
            if (sscf->shm_zone == NULL) {
                return NGX_CONF_ERROR;
            }

            sscf->shm_zone->init = ngx_ssl_session_cache_init;

            continue;
        }

        goto invalid;
    }

    if (sscf->shm_zone && sscf->builtin_session_cache == NGX_CONF_UNSET) {
        sscf->builtin_session_cache = NGX_SSL_NO_BUILTIN_SCACHE;
    }

    return NGX_CONF_OK;

invalid:

    ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                       "invalid session cache \"%V\"", &value[i]);

    return NGX_CONF_ERROR;
}


static char *
ngx_http_ssl_ocsp_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
    ngx_http_ssl_srv_conf_t *sscf = conf;

    size_t       len;
    ngx_int_t    n;
    ngx_str_t   *value, name, size;
    ngx_uint_t   j;

    if (sscf->ocsp_cache_zone != NGX_CONF_UNSET_PTR) {
        return "is duplicate";
    }

    value = cf->args->elts;

    if (ngx_strcmp(value[1].data, "off") == 0) {
        sscf->ocsp_cache_zone = NULL;
        return NGX_CONF_OK;
    }

    if (value[1].len <= sizeof("shared:") - 1
        || ngx_strncmp(value[1].data, "shared:", sizeof("shared:") - 1) != 0)
    {
        goto invalid;
    }

    len = 0;

    for (j = sizeof("shared:") - 1; j < value[1].len; j++) {
        if (value[1].data[j] == ':') {
            break;
        }

        len++;
    }

    if (len == 0 || j == value[1].len) {
        goto invalid;
    }

    name.len = len;
    name.data = value[1].data + sizeof("shared:") - 1;

    size.len = value[1].len - j - 1;
    size.data = name.data + len + 1;

    n = ngx_parse_size(&size);

    if (n == NGX_ERROR) {
        goto invalid;
    }

    if (n < (ngx_int_t) (8 * ngx_pagesize)) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "OCSP cache \"%V\" is too small", &value[1]);

        return NGX_CONF_ERROR;
    }

    sscf->ocsp_cache_zone = ngx_shared_memory_add(cf, &name, n,
                                                  &ngx_http_ssl_module_ctx);
    if (sscf->ocsp_cache_zone == NULL) {
        return NGX_CONF_ERROR;
    }

    sscf->ocsp_cache_zone->init = ngx_ssl_ocsp_cache_init;

    return NGX_CONF_OK;

invalid:

    ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                       "invalid OCSP cache \"%V\"", &value[1]);

    return NGX_CONF_ERROR;
}


static char *
ngx_http_ssl_conf_command_check(ngx_conf_t *cf, void *post, void *data)
{
#ifndef SSL_CONF_FLAG_FILE
    return "is not supported on this platform";
#else
    return NGX_CONF_OK;
#endif
}


static ngx_int_t
ngx_http_ssl_init(ngx_conf_t *cf)
{
    ngx_uint_t                   a, p, s;
    const char                  *name;
    ngx_http_conf_addr_t        *addr;
    ngx_http_conf_port_t        *port;
    ngx_http_ssl_srv_conf_t     *sscf;
    ngx_http_core_loc_conf_t    *clcf;
    ngx_http_core_srv_conf_t   **cscfp, *cscf;
    ngx_http_core_main_conf_t   *cmcf;

    cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
    cscfp = cmcf->servers.elts;

    for (s = 0; s < cmcf->servers.nelts; s++) {

        sscf = cscfp[s]->ctx->srv_conf[ngx_http_ssl_module.ctx_index];

        if (sscf->ssl.ctx == NULL) {
            continue;
        }

        clcf = cscfp[s]->ctx->loc_conf[ngx_http_core_module.ctx_index];

        if (sscf->stapling) {
            if (ngx_ssl_stapling_resolver(cf, &sscf->ssl, clcf->resolver,
                                          clcf->resolver_timeout)
                != NGX_OK)
            {
                return NGX_ERROR;
            }
        }

        if (sscf->ocsp) {
            if (ngx_ssl_ocsp_resolver(cf, &sscf->ssl, clcf->resolver,
                                      clcf->resolver_timeout)
                != NGX_OK)
            {
                return NGX_ERROR;
            }
        }
    }

    if (cmcf->ports == NULL) {
        return NGX_OK;
    }

    port = cmcf->ports->elts;
    for (p = 0; p < cmcf->ports->nelts; p++) {

        addr = port[p].addrs.elts;
        for (a = 0; a < port[p].addrs.nelts; a++) {

            if (!addr[a].opt.ssl && !addr[a].opt.quic) {
                continue;
            }

            if (addr[a].opt.quic) {
                name = "quic";

#if (NGX_QUIC_OPENSSL_COMPAT)
                if (ngx_http_ssl_quic_compat_init(cf, &addr[a]) != NGX_OK) {
                    return NGX_ERROR;
                }
#endif

            } else {
                name = "ssl";
            }

            cscf = addr[a].default_server;
            sscf = cscf->ctx->srv_conf[ngx_http_ssl_module.ctx_index];

            if (sscf->certificates) {

                if (addr[a].opt.quic && !(sscf->protocols & NGX_SSL_TLSv1_3)) {
                    ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
                                  "\"ssl_protocols\" must enable TLSv1.3 for "
                                  "the \"listen ... %s\" directive in %s:%ui",
                                  name, cscf->file_name, cscf->line);
                    return NGX_ERROR;
                }

                continue;
            }

            if (!sscf->reject_handshake) {
                ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
                              "no \"ssl_certificate\" is defined for "
                              "the \"listen ... %s\" directive in %s:%ui",
                              name, cscf->file_name, cscf->line);
                return NGX_ERROR;
            }

            /*
             * if no certificates are defined in the default server,
             * check all non-default server blocks
             */

            cscfp = addr[a].servers.elts;
            for (s = 0; s < addr[a].servers.nelts; s++) {

                cscf = cscfp[s];
                sscf = cscf->ctx->srv_conf[ngx_http_ssl_module.ctx_index];

                if (sscf->certificates || sscf->reject_handshake) {
                    continue;
                }

                ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
                              "no \"ssl_certificate\" is defined for "
                              "the \"listen ... %s\" directive in %s:%ui",
                              name, cscf->file_name, cscf->line);
                return NGX_ERROR;
            }
        }
    }

    return NGX_OK;
}


#if (NGX_QUIC_OPENSSL_COMPAT)

static ngx_int_t
ngx_http_ssl_quic_compat_init(ngx_conf_t *cf, ngx_http_conf_addr_t *addr)
{
    ngx_uint_t                  s;
    ngx_http_ssl_srv_conf_t    *sscf;
    ngx_http_core_srv_conf_t  **cscfp, *cscf;

    cscfp = addr->servers.elts;
    for (s = 0; s < addr->servers.nelts; s++) {

        cscf = cscfp[s];
        sscf = cscf->ctx->srv_conf[ngx_http_ssl_module.ctx_index];

        if (sscf->certificates || sscf->reject_handshake) {
            if (ngx_quic_compat_init(cf, sscf->ssl.ctx) != NGX_OK) {
                return NGX_ERROR;
            }
        }
    }

    return NGX_OK;
}

#endif