mirror/nginx
1
0
Fork 0
mirror of https://github.com/nginx/nginx.git synced 2024-12-16 06:09:00 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity
e61ba26744
nginx/src/mail/ngx_mail_ssl_module.c
Igor Sysoev e61ba26744 MSIE export versions are rare now, so RSA 512 key is generated on demand 
and is shared among all hosts instead of pregenerating for every HTTPS host
on configuraiton phase. This decreases start time for configuration with
large number of HTTPS hosts.
2011-07-20 12:59:24 +00:00

474 lines
13 KiB
C
Raw Blame History

/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_mail.h>
#define NGX_DEFAULT_CIPHERS "HIGH:!aNULL:!MD5"
static void *ngx_mail_ssl_create_conf(ngx_conf_t *cf);
static char *ngx_mail_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child);
static char *ngx_mail_ssl_enable(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_mail_ssl_starttls(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static ngx_conf_enum_t ngx_http_starttls_state[] = {
{ ngx_string("off"), NGX_MAIL_STARTTLS_OFF },
{ ngx_string("on"), NGX_MAIL_STARTTLS_ON },
{ ngx_string("only"), NGX_MAIL_STARTTLS_ONLY },
{ ngx_null_string, 0 }
};
static ngx_conf_bitmask_t ngx_mail_ssl_protocols[] = {
{ ngx_string("SSLv2"), NGX_SSL_SSLv2 },
{ ngx_string("SSLv3"), NGX_SSL_SSLv3 },
{ ngx_string("TLSv1"), NGX_SSL_TLSv1 },
{ ngx_null_string, 0 }
};
static ngx_command_t ngx_mail_ssl_commands[] = {
{ ngx_string("ssl"),
NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
ngx_mail_ssl_enable,
NGX_MAIL_SRV_CONF_OFFSET,
offsetof(ngx_mail_ssl_conf_t, enable),
NULL },
{ ngx_string("starttls"),
NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
ngx_mail_ssl_starttls,
NGX_MAIL_SRV_CONF_OFFSET,
offsetof(ngx_mail_ssl_conf_t, starttls),
ngx_http_starttls_state },
{ ngx_string("ssl_certificate"),
NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_MAIL_SRV_CONF_OFFSET,
offsetof(ngx_mail_ssl_conf_t, certificate),
NULL },
{ ngx_string("ssl_certificate_key"),
NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_MAIL_SRV_CONF_OFFSET,
offsetof(ngx_mail_ssl_conf_t, certificate_key),
NULL },
{ ngx_string("ssl_dhparam"),
NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_MAIL_SRV_CONF_OFFSET,
offsetof(ngx_mail_ssl_conf_t, dhparam),
NULL },
{ ngx_string("ssl_protocols"),
NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
ngx_conf_set_bitmask_slot,
NGX_MAIL_SRV_CONF_OFFSET,
offsetof(ngx_mail_ssl_conf_t, protocols),
&ngx_mail_ssl_protocols },
{ ngx_string("ssl_ciphers"),
NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_MAIL_SRV_CONF_OFFSET,
offsetof(ngx_mail_ssl_conf_t, ciphers),
NULL },
{ ngx_string("ssl_prefer_server_ciphers"),
NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_MAIL_SRV_CONF_OFFSET,
offsetof(ngx_mail_ssl_conf_t, prefer_server_ciphers),
NULL },
{ ngx_string("ssl_session_cache"),
NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE12,
ngx_mail_ssl_session_cache,
NGX_MAIL_SRV_CONF_OFFSET,
0,
NULL },
{ ngx_string("ssl_session_timeout"),
NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_sec_slot,
NGX_MAIL_SRV_CONF_OFFSET,
offsetof(ngx_mail_ssl_conf_t, session_timeout),
NULL },
ngx_null_command
};
static ngx_mail_module_t ngx_mail_ssl_module_ctx = {
NULL, /* protocol */
NULL, /* create main configuration */
NULL, /* init main configuration */
ngx_mail_ssl_create_conf, /* create server configuration */
ngx_mail_ssl_merge_conf /* merge server configuration */
};
ngx_module_t ngx_mail_ssl_module = {
NGX_MODULE_V1,
&ngx_mail_ssl_module_ctx, /* module context */
ngx_mail_ssl_commands, /* module directives */
NGX_MAIL_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_str_t ngx_mail_ssl_sess_id_ctx = ngx_string("MAIL");
static void *
ngx_mail_ssl_create_conf(ngx_conf_t *cf)
{
ngx_mail_ssl_conf_t *scf;
scf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_ssl_conf_t));
if (scf == NULL) {
return NULL;
}
/*
* set by ngx_pcalloc():
*
* scf->protocols = 0;
* scf->certificate = { 0, NULL };
* scf->certificate_key = { 0, NULL };
* scf->dhparam = { 0, NULL };
* scf->ciphers = { 0, NULL };
* scf->shm_zone = NULL;
*/
scf->enable = NGX_CONF_UNSET;
scf->starttls = NGX_CONF_UNSET_UINT;
scf->prefer_server_ciphers = NGX_CONF_UNSET;
scf->builtin_session_cache = NGX_CONF_UNSET;
scf->session_timeout = NGX_CONF_UNSET;
return scf;
}
static char *
ngx_mail_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_mail_ssl_conf_t *prev = parent;
ngx_mail_ssl_conf_t *conf = child;
char *mode;
ngx_pool_cleanup_t *cln;
ngx_conf_merge_value(conf->enable, prev->enable, 0);
ngx_conf_merge_uint_value(conf->starttls, prev->starttls,
NGX_MAIL_STARTTLS_OFF);
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_bitmask_value(conf->protocols, prev->protocols,
(NGX_CONF_BITMASK_SET|NGX_SSL_SSLv3|NGX_SSL_TLSv1));
ngx_conf_merge_str_value(conf->certificate, prev->certificate, "");
ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key, "");
ngx_conf_merge_str_value(conf->dhparam, prev->dhparam, "");
ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFAULT_CIPHERS);
conf->ssl.log = cf->log;
if (conf->enable) {
mode = "ssl";
} else if (conf->starttls != NGX_MAIL_STARTTLS_OFF) {
mode = "starttls";
} else {
mode = "";
}
if (*mode) {
if (conf->certificate.len == 0) {
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"no \"ssl_certificate\" is defined for "
"the \"%s\" directive in %s:%ui",
mode, conf->file, conf->line);
return NGX_CONF_ERROR;
}
if (conf->certificate_key.len == 0) {
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"no \"ssl_certificate_key\" is defined for "
"the \"%s\" directive in %s:%ui",
mode, conf->file, conf->line);
return NGX_CONF_ERROR;
}
} else {
if (conf->certificate.len == 0) {
return NGX_CONF_OK;
}
if (conf->certificate_key.len == 0) {
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"no \"ssl_certificate_key\" is defined "
"for certificate \"%V\"",
&conf->certificate);
return NGX_CONF_ERROR;
}
}
if (ngx_ssl_create(&conf->ssl, conf->protocols, NULL) != NGX_OK) {
return NGX_CONF_ERROR;
}
cln = ngx_pool_cleanup_add(cf->pool, 0);
if (cln == NULL) {
return NGX_CONF_ERROR;
}
cln->handler = ngx_ssl_cleanup_ctx;
cln->data = &conf->ssl;
if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate,
&conf->certificate_key)
!= NGX_OK)
{
return NGX_CONF_ERROR;
}
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 (conf->prefer_server_ciphers) {
SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
}
SSL_CTX_set_tmp_rsa_callback(conf->ssl.ctx, ngx_ssl_rsa512_key_callback);
if (ngx_ssl_dhparam(cf, &conf->ssl, &conf->dhparam) != 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_mail_ssl_sess_id_ctx,
conf->builtin_session_cache,
conf->shm_zone, conf->session_timeout)
!= NGX_OK)
{
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
static char *
ngx_mail_ssl_enable(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_mail_ssl_conf_t *scf = conf;
char *rv;
rv = ngx_conf_set_flag_slot(cf, cmd, conf);
if (rv != NGX_CONF_OK) {
return rv;
}
if (scf->enable && (ngx_int_t) scf->starttls > NGX_MAIL_STARTTLS_OFF) {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"\"starttls\" directive conflicts with \"ssl on\"");
return NGX_CONF_ERROR;
}
scf->file = cf->conf_file->file.name.data;
scf->line = cf->conf_file->line;
return NGX_CONF_OK;
}
static char *
ngx_mail_ssl_starttls(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_mail_ssl_conf_t *scf = conf;
char *rv;
rv = ngx_conf_set_enum_slot(cf, cmd, conf);
if (rv != NGX_CONF_OK) {
return rv;
}
if (scf->enable == 1 && (ngx_int_t) scf->starttls > NGX_MAIL_STARTTLS_OFF) {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"\"ssl\" directive conflicts with \"starttls\"");
return NGX_CONF_ERROR;
}
scf->file = cf->conf_file->file.name.data;
scf->line = cf->conf_file->line;
return NGX_CONF_OK;
}
static char *
ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_mail_ssl_conf_t *scf = 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) {
scf->builtin_session_cache = NGX_SSL_NO_SCACHE;
continue;
}
if (ngx_strcmp(value[i].data, "none") == 0) {
scf->builtin_session_cache = NGX_SSL_NONE_SCACHE;
continue;
}
if (ngx_strcmp(value[i].data, "builtin") == 0) {
scf->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;
}
scf->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) {
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;
}
scf->shm_zone = ngx_shared_memory_add(cf, &name, n,
&ngx_mail_ssl_module);
if (scf->shm_zone == NULL) {
return NGX_CONF_ERROR;
}
continue;
}
goto invalid;
}
if (scf->shm_zone && scf->builtin_session_cache == NGX_CONF_UNSET) {
scf->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;
}
Reference in New Issue View Git Blame Copy Permalink