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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_imap.h>
#define NGX_DEFLAUT_CERTIFICATE "cert.pem"
#define NGX_DEFLAUT_CERTIFICATE_KEY "cert.pem"
static void *ngx_imap_ssl_create_conf(ngx_conf_t *cf);
static char *ngx_imap_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child);
static ngx_command_t ngx_imap_ssl_commands[] = {
{ ngx_string("ssl"),
NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_IMAP_SRV_CONF_OFFSET,
offsetof(ngx_imap_ssl_conf_t, enable),
NULL },
{ ngx_string("ssl_certificate"),
NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_IMAP_SRV_CONF_OFFSET,
offsetof(ngx_imap_ssl_conf_t, certificate),
NULL },
{ ngx_string("ssl_certificate_key"),
NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_IMAP_SRV_CONF_OFFSET,
offsetof(ngx_imap_ssl_conf_t, certificate_key),
NULL },
{ ngx_string("ssl_ciphers"),
NGX_IMAP_MAIN_CONF|NGX_IMAP_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_IMAP_SRV_CONF_OFFSET,
offsetof(ngx_imap_ssl_conf_t, ciphers),
NULL },
ngx_null_command
};
static ngx_imap_module_t ngx_imap_ssl_module_ctx = {
NULL, /* create main configuration */
NULL, /* init main configuration */
ngx_imap_ssl_create_conf, /* create server configuration */
ngx_imap_ssl_merge_conf /* merge server configuration */
};
ngx_module_t ngx_imap_ssl_module = {
NGX_MODULE_V1,
&ngx_imap_ssl_module_ctx, /* module context */
ngx_imap_ssl_commands, /* module directives */
NGX_IMAP_MODULE, /* module type */
NULL, /* init module */
NULL /* init process */
};
static void *
ngx_imap_ssl_create_conf(ngx_conf_t *cf)
{
ngx_imap_ssl_conf_t *scf;
scf = ngx_pcalloc(cf->pool, sizeof(ngx_imap_ssl_conf_t));
if (scf == NULL) {
return NGX_CONF_ERROR;
}
/*
* set by ngx_pcalloc():
*
* scf->certificate.len = 0;
* scf->certificate.data = NULL;
* scf->certificate_key.len = 0;
* scf->certificate_key.data = NULL;
* scf->ciphers.len = 0;
* scf->ciphers.data = NULL;
*/
scf->enable = NGX_CONF_UNSET;
return scf;
}
static char *
ngx_imap_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_imap_ssl_conf_t *prev = parent;
ngx_imap_ssl_conf_t *conf = child;
ngx_conf_merge_value(conf->enable, prev->enable, 0);
if (conf->enable == 0) {
return NGX_CONF_OK;
}
ngx_conf_merge_str_value(conf->certificate, prev->certificate,
NGX_DEFLAUT_CERTIFICATE);
ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key,
NGX_DEFLAUT_CERTIFICATE_KEY);
ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, "");
/* TODO: configure methods */
conf->ssl_ctx = SSL_CTX_new(SSLv23_server_method());
if (conf->ssl_ctx == NULL) {
ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0, "SSL_CTX_new() failed");
return NGX_CONF_ERROR;
}
if (ngx_pool_cleanup_add(cf->pool, ngx_ssl_cleanup_ctx, conf->ssl_ctx)
== NULL)
{
return NGX_CONF_ERROR;
}
#if 0
SSL_CTX_set_options(conf->ssl_ctx, SSL_OP_ALL);
SSL_CTX_set_options(conf->ssl_ctx, SSL_OP_NO_SSLv3);
SSL_CTX_set_options(conf->ssl_ctx, SSL_OP_SINGLE_DH_USE);
#endif
if (conf->ciphers.len) {
if (SSL_CTX_set_cipher_list(conf->ssl_ctx,
(const char *) conf->ciphers.data) == 0)
{
ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
"SSL_CTX_set_cipher_list(\"%V\") failed",
&conf->ciphers);
}
}
if (SSL_CTX_use_certificate_chain_file(conf->ssl_ctx,
(char *) conf->certificate.data) == 0)
{
ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
"SSL_CTX_use_certificate_chain_file(\"%s\") failed",
conf->certificate.data);
return NGX_CONF_ERROR;
}
if (SSL_CTX_use_PrivateKey_file(conf->ssl_ctx,
(char *) conf->certificate_key.data,
SSL_FILETYPE_PEM) == 0)
{
ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
"SSL_CTX_use_PrivateKey_file(\"%s\") failed",
conf->certificate_key.data);
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
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