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nginx/src/stream/ngx_stream_ssl_module.c
Maxim Dounin fe43346dc3 SSL: fixed potential leak on memory allocation errors. 
If ngx_pool_cleanup_add() fails, we have to clean just created SSL context
manually, thus appropriate call added.

Additionally, ngx_pool_cleanup_add() moved closer to ngx_ssl_create() in
the ngx_http_ssl_module, to make sure there are no leaks due to intermediate
code.
2019-03-03 16:48:39 +03:00

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/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_stream.h>
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"
static ngx_int_t ngx_stream_ssl_handler(ngx_stream_session_t *s);
static ngx_int_t ngx_stream_ssl_init_connection(ngx_ssl_t *ssl,
ngx_connection_t *c);
static void ngx_stream_ssl_handshake_handler(ngx_connection_t *c);
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
int ngx_stream_ssl_servername(ngx_ssl_conn_t *ssl_conn, int *ad, void *arg);
#endif
#ifdef SSL_R_CERT_CB_ERROR
static int ngx_stream_ssl_certificate(ngx_ssl_conn_t *ssl_conn, void *arg);
#endif
static ngx_int_t ngx_stream_ssl_static_variable(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_ssl_variable(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_ssl_add_variables(ngx_conf_t *cf);
static void *ngx_stream_ssl_create_conf(ngx_conf_t *cf);
static char *ngx_stream_ssl_merge_conf(ngx_conf_t *cf, void *parent,
void *child);
static ngx_int_t ngx_stream_ssl_compile_certificates(ngx_conf_t *cf,
ngx_stream_ssl_conf_t *conf);
static char *ngx_stream_ssl_password_file(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_stream_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static ngx_int_t ngx_stream_ssl_init(ngx_conf_t *cf);
static ngx_conf_bitmask_t ngx_stream_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_stream_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_command_t ngx_stream_ssl_commands[] = {
{ ngx_string("ssl_handshake_timeout"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, handshake_timeout),
NULL },
{ ngx_string("ssl_certificate"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_array_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, certificates),
NULL },
{ ngx_string("ssl_certificate_key"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_array_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, certificate_keys),
NULL },
{ ngx_string("ssl_password_file"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_stream_ssl_password_file,
NGX_STREAM_SRV_CONF_OFFSET,
0,
NULL },
{ ngx_string("ssl_dhparam"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, dhparam),
NULL },
{ ngx_string("ssl_ecdh_curve"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, ecdh_curve),
NULL },
{ ngx_string("ssl_protocols"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_1MORE,
ngx_conf_set_bitmask_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, protocols),
&ngx_stream_ssl_protocols },
{ ngx_string("ssl_ciphers"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, ciphers),
NULL },
{ ngx_string("ssl_verify_client"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_enum_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, verify),
&ngx_stream_ssl_verify },
{ ngx_string("ssl_verify_depth"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, verify_depth),
NULL },
{ ngx_string("ssl_client_certificate"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, client_certificate),
NULL },
{ ngx_string("ssl_trusted_certificate"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, trusted_certificate),
NULL },
{ ngx_string("ssl_prefer_server_ciphers"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, prefer_server_ciphers),
NULL },
{ ngx_string("ssl_session_cache"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE12,
ngx_stream_ssl_session_cache,
NGX_STREAM_SRV_CONF_OFFSET,
0,
NULL },
{ ngx_string("ssl_session_tickets"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, session_tickets),
NULL },
{ ngx_string("ssl_session_ticket_key"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_array_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, session_ticket_keys),
NULL },
{ ngx_string("ssl_session_timeout"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_sec_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, session_timeout),
NULL },
{ ngx_string("ssl_crl"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_conf_t, crl),
NULL },
ngx_null_command
};
static ngx_stream_module_t ngx_stream_ssl_module_ctx = {
ngx_stream_ssl_add_variables, /* preconfiguration */
ngx_stream_ssl_init, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
ngx_stream_ssl_create_conf, /* create server configuration */
ngx_stream_ssl_merge_conf /* merge server configuration */
};
ngx_module_t ngx_stream_ssl_module = {
NGX_MODULE_V1,
&ngx_stream_ssl_module_ctx, /* module context */
ngx_stream_ssl_commands, /* module directives */
NGX_STREAM_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_stream_variable_t ngx_stream_ssl_vars[] = {
{ ngx_string("ssl_protocol"), NULL, ngx_stream_ssl_static_variable,
(uintptr_t) ngx_ssl_get_protocol, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_cipher"), NULL, ngx_stream_ssl_static_variable,
(uintptr_t) ngx_ssl_get_cipher_name, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_ciphers"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_ciphers, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_curves"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_curves, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_session_id"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_session_id, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_session_reused"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_session_reused, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_server_name"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_server_name, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_cert"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_certificate, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_raw_cert"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_raw_certificate,
NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_escaped_cert"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_escaped_certificate,
NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_s_dn"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_subject_dn, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_i_dn"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_issuer_dn, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_serial"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_serial_number, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_fingerprint"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_fingerprint, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_verify"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_client_verify, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_v_start"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_client_v_start, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_v_end"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_client_v_end, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_v_remain"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_client_v_remain, NGX_STREAM_VAR_CHANGEABLE, 0 },
ngx_stream_null_variable
};
static ngx_str_t ngx_stream_ssl_sess_id_ctx = ngx_string("STREAM");
static ngx_int_t
ngx_stream_ssl_handler(ngx_stream_session_t *s)
{
long rc;
X509 *cert;
ngx_int_t rv;
ngx_connection_t *c;
ngx_stream_ssl_conf_t *sslcf;
if (!s->ssl) {
return NGX_OK;
}
c = s->connection;
sslcf = ngx_stream_get_module_srv_conf(s, ngx_stream_ssl_module);
if (c->ssl == NULL) {
c->log->action = "SSL handshaking";
rv = ngx_stream_ssl_init_connection(&sslcf->ssl, c);
if (rv != NGX_OK) {
return rv;
}
}
if (sslcf->verify) {
rc = SSL_get_verify_result(c->ssl->connection);
if (rc != X509_V_OK
&& (sslcf->verify != 3 || !ngx_ssl_verify_error_optional(rc)))
{
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"client SSL certificate verify error: (%l:%s)",
rc, X509_verify_cert_error_string(rc));
ngx_ssl_remove_cached_session(c->ssl->session_ctx,
(SSL_get0_session(c->ssl->connection)));
return NGX_ERROR;
}
if (sslcf->verify == 1) {
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"client sent no required SSL certificate");
ngx_ssl_remove_cached_session(c->ssl->session_ctx,
(SSL_get0_session(c->ssl->connection)));
return NGX_ERROR;
}
X509_free(cert);
}
}
return NGX_OK;
}
static ngx_int_t
ngx_stream_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c)
{
ngx_int_t rc;
ngx_stream_session_t *s;
ngx_stream_ssl_conf_t *sslcf;
ngx_stream_core_srv_conf_t *cscf;
s = c->data;
cscf = ngx_stream_get_module_srv_conf(s, ngx_stream_core_module);
if (cscf->tcp_nodelay && ngx_tcp_nodelay(c) != NGX_OK) {
return NGX_ERROR;
}
if (ngx_ssl_create_connection(ssl, c, 0) != NGX_OK) {
return NGX_ERROR;
}
rc = ngx_ssl_handshake(c);
if (rc == NGX_ERROR) {
return NGX_ERROR;
}
if (rc == NGX_AGAIN) {
sslcf = ngx_stream_get_module_srv_conf(s, ngx_stream_ssl_module);
ngx_add_timer(c->read, sslcf->handshake_timeout);
c->ssl->handler = ngx_stream_ssl_handshake_handler;
return NGX_AGAIN;
}
/* rc == NGX_OK */
return NGX_OK;
}
static void
ngx_stream_ssl_handshake_handler(ngx_connection_t *c)
{
ngx_stream_session_t *s;
s = c->data;
if (!c->ssl->handshaked) {
ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
if (c->read->timer_set) {
ngx_del_timer(c->read);
}
ngx_stream_core_run_phases(s);
}
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
int
ngx_stream_ssl_servername(ngx_ssl_conn_t *ssl_conn, int *ad, void *arg)
{
return SSL_TLSEXT_ERR_OK;
}
#endif
#ifdef SSL_R_CERT_CB_ERROR
int
ngx_stream_ssl_certificate(ngx_ssl_conn_t *ssl_conn, void *arg)
{
ngx_str_t cert, key;
ngx_uint_t i, nelts;
ngx_connection_t *c;
ngx_stream_session_t *s;
ngx_stream_ssl_conf_t *sslcf;
ngx_stream_complex_value_t *certs, *keys;
c = ngx_ssl_get_connection(ssl_conn);
if (c->ssl->handshaked) {
return 0;
}
s = c->data;
sslcf = arg;
nelts = sslcf->certificate_values->nelts;
certs = sslcf->certificate_values->elts;
keys = sslcf->certificate_key_values->elts;
for (i = 0; i < nelts; i++) {
if (ngx_stream_complex_value(s, &certs[i], &cert) != NGX_OK) {
return 0;
}
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0,
"ssl cert: \"%s\"", cert.data);
if (ngx_stream_complex_value(s, &keys[i], &key) != NGX_OK) {
return 0;
}
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0,
"ssl key: \"%s\"", key.data);
if (ngx_ssl_connection_certificate(c, c->pool, &cert, &key,
sslcf->passwords)
!= NGX_OK)
{
return 0;
}
}
return 1;
}
#endif
static ngx_int_t
ngx_stream_ssl_static_variable(ngx_stream_session_t *s,
ngx_stream_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 str;
if (s->connection->ssl) {
(void) handler(s->connection, NULL, &str);
v->data = str.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_stream_ssl_variable(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
ngx_str_t str;
if (s->connection->ssl) {
if (handler(s->connection, s->connection->pool, &str) != NGX_OK) {
return NGX_ERROR;
}
v->len = str.len;
v->data = str.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_stream_ssl_add_variables(ngx_conf_t *cf)
{
ngx_stream_variable_t *var, *v;
for (v = ngx_stream_ssl_vars; v->name.len; v++) {
var = ngx_stream_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_stream_ssl_create_conf(ngx_conf_t *cf)
{
ngx_stream_ssl_conf_t *scf;
scf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_ssl_conf_t));
if (scf == NULL) {
return NULL;
}
/*
* set by ngx_pcalloc():
*
* scf->listen = 0;
* scf->protocols = 0;
* scf->certificate_values = NULL;
* scf->dhparam = { 0, NULL };
* scf->ecdh_curve = { 0, NULL };
* scf->client_certificate = { 0, NULL };
* scf->trusted_certificate = { 0, NULL };
* scf->crl = { 0, NULL };
* scf->ciphers = { 0, NULL };
* scf->shm_zone = NULL;
*/
scf->handshake_timeout = NGX_CONF_UNSET_MSEC;
scf->certificates = NGX_CONF_UNSET_PTR;
scf->certificate_keys = NGX_CONF_UNSET_PTR;
scf->passwords = NGX_CONF_UNSET_PTR;
scf->prefer_server_ciphers = NGX_CONF_UNSET;
scf->verify = NGX_CONF_UNSET_UINT;
scf->verify_depth = NGX_CONF_UNSET_UINT;
scf->builtin_session_cache = NGX_CONF_UNSET;
scf->session_timeout = NGX_CONF_UNSET;
scf->session_tickets = NGX_CONF_UNSET;
scf->session_ticket_keys = NGX_CONF_UNSET_PTR;
return scf;
}
static char *
ngx_stream_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_stream_ssl_conf_t *prev = parent;
ngx_stream_ssl_conf_t *conf = child;
ngx_pool_cleanup_t *cln;
ngx_conf_merge_msec_value(conf->handshake_timeout,
prev->handshake_timeout, 60000);
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_TLSv1
|NGX_SSL_TLSv1_1|NGX_SSL_TLSv1_2));
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);
conf->ssl.log = cf->log;
if (!conf->listen) {
return NGX_CONF_OK;
}
if (conf->certificates == NULL) {
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"no \"ssl_certificate\" is defined for "
"the \"listen ... ssl\" directive in %s:%ui",
conf->file, conf->line);
return NGX_CONF_ERROR;
}
if (conf->certificate_keys == NULL) {
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"no \"ssl_certificate_key\" is defined for "
"the \"listen ... ssl\" directive in %s:%ui",
conf->file, conf->line);
return NGX_CONF_ERROR;
}
if (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\" and "
"the \"listen ... ssl\" directive in %s:%ui",
((ngx_str_t *) conf->certificates->elts)
+ conf->certificates->nelts - 1,
conf->file, conf->line);
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) {
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
SSL_CTX_set_tlsext_servername_callback(conf->ssl.ctx,
ngx_stream_ssl_servername);
#endif
if (ngx_stream_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_stream_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 {
/* configure certificates */
if (ngx_ssl_certificates(cf, &conf->ssl, conf->certificates,
conf->certificate_keys, conf->passwords)
!= NGX_OK)
{
return NGX_CONF_ERROR;
}
}
if (ngx_ssl_ciphers(cf, &conf->ssl, &conf->ciphers,
conf->prefer_server_ciphers)
!= NGX_OK)
{
return NGX_CONF_ERROR;
}
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_client_verify");
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 (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_stream_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;
}
return NGX_CONF_OK;
}
static ngx_int_t
ngx_stream_ssl_compile_certificates(ngx_conf_t *cf,
ngx_stream_ssl_conf_t *conf)
{
ngx_str_t *cert, *key;
ngx_uint_t i, nelts;
ngx_stream_complex_value_t *cv;
ngx_stream_compile_complex_value_t ccv;
cert = conf->certificates->elts;
key = conf->certificate_keys->elts;
nelts = conf->certificates->nelts;
for (i = 0; i < nelts; i++) {
if (ngx_stream_script_variables_count(&cert[i])) {
goto found;
}
if (ngx_stream_script_variables_count(&key[i])) {
goto found;
}
}
return NGX_OK;
found:
conf->certificate_values = ngx_array_create(cf->pool, nelts,
sizeof(ngx_stream_complex_value_t));
if (conf->certificate_values == NULL) {
return NGX_ERROR;
}
conf->certificate_key_values = ngx_array_create(cf->pool, nelts,
sizeof(ngx_stream_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_stream_compile_complex_value_t));
ccv.cf = cf;
ccv.value = &cert[i];
ccv.complex_value = cv;
ccv.zero = 1;
if (ngx_stream_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_stream_compile_complex_value_t));
ccv.cf = cf;
ccv.value = &key[i];
ccv.complex_value = cv;
ccv.zero = 1;
if (ngx_stream_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_stream_ssl_password_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_stream_ssl_conf_t *scf = conf;
ngx_str_t *value;
if (scf->passwords != NGX_CONF_UNSET_PTR) {
return "is duplicate";
}
value = cf->args->elts;
scf->passwords = ngx_ssl_read_password_file(cf, &value[1]);
if (scf->passwords == NULL) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
static char *
ngx_stream_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_stream_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_stream_ssl_module);
if (scf->shm_zone == NULL) {
return NGX_CONF_ERROR;
}
scf->shm_zone->init = ngx_ssl_session_cache_init;
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;
}
static ngx_int_t
ngx_stream_ssl_init(ngx_conf_t *cf)
{
ngx_stream_handler_pt *h;
ngx_stream_core_main_conf_t *cmcf;
cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module);
h = ngx_array_push(&cmcf->phases[NGX_STREAM_SSL_PHASE].handlers);
if (h == NULL) {
return NGX_ERROR;
}
*h = ngx_stream_ssl_handler;
return NGX_OK;
}
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