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nginx / nginx / 4ac704d297b807990a9b4a252bd1923b3a7b572f / . / src / event / ngx_event_openssl.c
blob: 1d43b733374b6c2ce8dcbe87c444ee0198f8824b [file] [log] [blame]
/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#define NGX_SSL_PASSWORD_BUFFER_SIZE 4096
typedef struct {
ngx_uint_t engine; /* unsigned engine:1; */
} ngx_openssl_conf_t;
static int ngx_ssl_password_callback(char *buf, int size, int rwflag,
void *userdata);
static int ngx_ssl_verify_callback(int ok, X509_STORE_CTX *x509_store);
static void ngx_ssl_info_callback(const ngx_ssl_conn_t *ssl_conn, int where,
int ret);
static void ngx_ssl_passwords_cleanup(void *data);
static void ngx_ssl_handshake_handler(ngx_event_t *ev);
static ngx_int_t ngx_ssl_handle_recv(ngx_connection_t *c, int n);
static void ngx_ssl_write_handler(ngx_event_t *wev);
static void ngx_ssl_read_handler(ngx_event_t *rev);
static void ngx_ssl_shutdown_handler(ngx_event_t *ev);
static void ngx_ssl_connection_error(ngx_connection_t *c, int sslerr,
ngx_err_t err, char *text);
static void ngx_ssl_clear_error(ngx_log_t *log);
static ngx_int_t ngx_ssl_session_id_context(ngx_ssl_t *ssl,
ngx_str_t *sess_ctx);
ngx_int_t ngx_ssl_session_cache_init(ngx_shm_zone_t *shm_zone, void *data);
static int ngx_ssl_new_session(ngx_ssl_conn_t *ssl_conn,
ngx_ssl_session_t *sess);
static ngx_ssl_session_t *ngx_ssl_get_cached_session(ngx_ssl_conn_t *ssl_conn,
#if OPENSSL_VERSION_NUMBER >= 0x10100003L
const
#endif
u_char *id, int len, int *copy);
static void ngx_ssl_remove_session(SSL_CTX *ssl, ngx_ssl_session_t *sess);
static void ngx_ssl_expire_sessions(ngx_ssl_session_cache_t *cache,
ngx_slab_pool_t *shpool, ngx_uint_t n);
static void ngx_ssl_session_rbtree_insert_value(ngx_rbtree_node_t *temp,
ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
#ifdef SSL_CTRL_SET_TLSEXT_TICKET_KEY_CB
static int ngx_ssl_session_ticket_key_callback(ngx_ssl_conn_t *ssl_conn,
unsigned char *name, unsigned char *iv, EVP_CIPHER_CTX *ectx,
HMAC_CTX *hctx, int enc);
#endif
#ifndef X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT
static ngx_int_t ngx_ssl_check_name(ngx_str_t *name, ASN1_STRING *str);
#endif
static time_t ngx_ssl_parse_time(
#if OPENSSL_VERSION_NUMBER > 0x10100000L
const
#endif
ASN1_TIME *asn1time);
static void *ngx_openssl_create_conf(ngx_cycle_t *cycle);
static char *ngx_openssl_engine(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static void ngx_openssl_exit(ngx_cycle_t *cycle);
static ngx_command_t ngx_openssl_commands[] = {
{ ngx_string("ssl_engine"),
NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
ngx_openssl_engine,
0,
0,
NULL },
ngx_null_command
};
static ngx_core_module_t ngx_openssl_module_ctx = {
ngx_string("openssl"),
ngx_openssl_create_conf,
NULL
};
ngx_module_t ngx_openssl_module = {
NGX_MODULE_V1,
&ngx_openssl_module_ctx, /* module context */
ngx_openssl_commands, /* module directives */
NGX_CORE_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
ngx_openssl_exit, /* exit master */
NGX_MODULE_V1_PADDING
};
int ngx_ssl_connection_index;
int ngx_ssl_server_conf_index;
int ngx_ssl_session_cache_index;
int ngx_ssl_session_ticket_keys_index;
int ngx_ssl_certificate_index;
int ngx_ssl_next_certificate_index;
int ngx_ssl_certificate_name_index;
int ngx_ssl_stapling_index;
ngx_int_t
ngx_ssl_init(ngx_log_t *log)
{
#if OPENSSL_VERSION_NUMBER >= 0x10100003L
if (OPENSSL_init_ssl(OPENSSL_INIT_LOAD_CONFIG, NULL) == 0) {
ngx_ssl_error(NGX_LOG_ALERT, log, 0, "OPENSSL_init_ssl() failed");
return NGX_ERROR;
}
/*
* OPENSSL_init_ssl() may leave errors in the error queue
* while returning success
*/
ERR_clear_error();
#else
OPENSSL_config(NULL);
SSL_library_init();
SSL_load_error_strings();
OpenSSL_add_all_algorithms();
#endif
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
#ifndef SSL_OP_NO_COMPRESSION
{
/*
* Disable gzip compression in OpenSSL prior to 1.0.0 version,
* this saves about 522K per connection.
*/
int n;
STACK_OF(SSL_COMP) *ssl_comp_methods;
ssl_comp_methods = SSL_COMP_get_compression_methods();
n = sk_SSL_COMP_num(ssl_comp_methods);
while (n--) {
(void) sk_SSL_COMP_pop(ssl_comp_methods);
}
}
#endif
#endif
ngx_ssl_connection_index = SSL_get_ex_new_index(0, NULL, NULL, NULL, NULL);
if (ngx_ssl_connection_index == -1) {
ngx_ssl_error(NGX_LOG_ALERT, log, 0, "SSL_get_ex_new_index() failed");
return NGX_ERROR;
}
ngx_ssl_server_conf_index = SSL_CTX_get_ex_new_index(0, NULL, NULL, NULL,
NULL);
if (ngx_ssl_server_conf_index == -1) {
ngx_ssl_error(NGX_LOG_ALERT, log, 0,
"SSL_CTX_get_ex_new_index() failed");
return NGX_ERROR;
}
ngx_ssl_session_cache_index = SSL_CTX_get_ex_new_index(0, NULL, NULL, NULL,
NULL);
if (ngx_ssl_session_cache_index == -1) {
ngx_ssl_error(NGX_LOG_ALERT, log, 0,
"SSL_CTX_get_ex_new_index() failed");
return NGX_ERROR;
}
ngx_ssl_session_ticket_keys_index = SSL_CTX_get_ex_new_index(0, NULL, NULL,
NULL, NULL);
if (ngx_ssl_session_ticket_keys_index == -1) {
ngx_ssl_error(NGX_LOG_ALERT, log, 0,
"SSL_CTX_get_ex_new_index() failed");
return NGX_ERROR;
}
ngx_ssl_certificate_index = SSL_CTX_get_ex_new_index(0, NULL, NULL, NULL,
NULL);
if (ngx_ssl_certificate_index == -1) {
ngx_ssl_error(NGX_LOG_ALERT, log, 0,
"SSL_CTX_get_ex_new_index() failed");
return NGX_ERROR;
}
ngx_ssl_next_certificate_index = X509_get_ex_new_index(0, NULL, NULL, NULL,
NULL);
if (ngx_ssl_next_certificate_index == -1) {
ngx_ssl_error(NGX_LOG_ALERT, log, 0, "X509_get_ex_new_index() failed");
return NGX_ERROR;
}
ngx_ssl_certificate_name_index = X509_get_ex_new_index(0, NULL, NULL, NULL,
NULL);
if (ngx_ssl_certificate_name_index == -1) {
ngx_ssl_error(NGX_LOG_ALERT, log, 0, "X509_get_ex_new_index() failed");
return NGX_ERROR;
}
ngx_ssl_stapling_index = X509_get_ex_new_index(0, NULL, NULL, NULL, NULL);
if (ngx_ssl_stapling_index == -1) {
ngx_ssl_error(NGX_LOG_ALERT, log, 0, "X509_get_ex_new_index() failed");
return NGX_ERROR;
}
return NGX_OK;
}
ngx_int_t
ngx_ssl_create(ngx_ssl_t *ssl, ngx_uint_t protocols, void *data)
{
ssl->ctx = SSL_CTX_new(SSLv23_method());
if (ssl->ctx == NULL) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_new() failed");
return NGX_ERROR;
}
if (SSL_CTX_set_ex_data(ssl->ctx, ngx_ssl_server_conf_index, data) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_set_ex_data() failed");
return NGX_ERROR;
}
if (SSL_CTX_set_ex_data(ssl->ctx, ngx_ssl_certificate_index, NULL) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_set_ex_data() failed");
return NGX_ERROR;
}
ssl->buffer_size = NGX_SSL_BUFSIZE;
/* client side options */
#ifdef SSL_OP_MICROSOFT_SESS_ID_BUG
SSL_CTX_set_options(ssl->ctx, SSL_OP_MICROSOFT_SESS_ID_BUG);
#endif
#ifdef SSL_OP_NETSCAPE_CHALLENGE_BUG
SSL_CTX_set_options(ssl->ctx, SSL_OP_NETSCAPE_CHALLENGE_BUG);
#endif
/* server side options */
#ifdef SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG
SSL_CTX_set_options(ssl->ctx, SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG);
#endif
#ifdef SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER
SSL_CTX_set_options(ssl->ctx, SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER);
#endif
#ifdef SSL_OP_MSIE_SSLV2_RSA_PADDING
/* this option allow a potential SSL 2.0 rollback (CAN-2005-2969) */
SSL_CTX_set_options(ssl->ctx, SSL_OP_MSIE_SSLV2_RSA_PADDING);
#endif
#ifdef SSL_OP_SSLEAY_080_CLIENT_DH_BUG
SSL_CTX_set_options(ssl->ctx, SSL_OP_SSLEAY_080_CLIENT_DH_BUG);
#endif
#ifdef SSL_OP_TLS_D5_BUG
SSL_CTX_set_options(ssl->ctx, SSL_OP_TLS_D5_BUG);
#endif
#ifdef SSL_OP_TLS_BLOCK_PADDING_BUG
SSL_CTX_set_options(ssl->ctx, SSL_OP_TLS_BLOCK_PADDING_BUG);
#endif
#ifdef SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS
SSL_CTX_set_options(ssl->ctx, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
#endif
SSL_CTX_set_options(ssl->ctx, SSL_OP_SINGLE_DH_USE);
#ifdef SSL_CTRL_CLEAR_OPTIONS
/* only in 0.9.8m+ */
SSL_CTX_clear_options(ssl->ctx,
SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TLSv1);
#endif
if (!(protocols & NGX_SSL_SSLv2)) {
SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_SSLv2);
}
if (!(protocols & NGX_SSL_SSLv3)) {
SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_SSLv3);
}
if (!(protocols & NGX_SSL_TLSv1)) {
SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_TLSv1);
}
#ifdef SSL_OP_NO_TLSv1_1
SSL_CTX_clear_options(ssl->ctx, SSL_OP_NO_TLSv1_1);
if (!(protocols & NGX_SSL_TLSv1_1)) {
SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_TLSv1_1);
}
#endif
#ifdef SSL_OP_NO_TLSv1_2
SSL_CTX_clear_options(ssl->ctx, SSL_OP_NO_TLSv1_2);
if (!(protocols & NGX_SSL_TLSv1_2)) {
SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_TLSv1_2);
}
#endif
#ifdef SSL_OP_NO_COMPRESSION
SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_COMPRESSION);
#endif
#ifdef SSL_MODE_RELEASE_BUFFERS
SSL_CTX_set_mode(ssl->ctx, SSL_MODE_RELEASE_BUFFERS);
#endif
#ifdef SSL_MODE_NO_AUTO_CHAIN
SSL_CTX_set_mode(ssl->ctx, SSL_MODE_NO_AUTO_CHAIN);
#endif
SSL_CTX_set_read_ahead(ssl->ctx, 1);
SSL_CTX_set_info_callback(ssl->ctx, ngx_ssl_info_callback);
return NGX_OK;
}
ngx_int_t
ngx_ssl_certificates(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_array_t *certs,
ngx_array_t *keys, ngx_array_t *passwords)
{
ngx_str_t *cert, *key;
ngx_uint_t i;
cert = certs->elts;
key = keys->elts;
for (i = 0; i < certs->nelts; i++) {
if (ngx_ssl_certificate(cf, ssl, &cert[i], &key[i], passwords)
!= NGX_OK)
{
return NGX_ERROR;
}
}
return NGX_OK;
}
ngx_int_t
ngx_ssl_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert,
ngx_str_t *key, ngx_array_t *passwords)
{
BIO *bio;
X509 *x509;
u_long n;
ngx_str_t *pwd;
ngx_uint_t tries;
if (ngx_conf_full_name(cf->cycle, cert, 1) != NGX_OK) {
return NGX_ERROR;
}
/*
* we can't use SSL_CTX_use_certificate_chain_file() as it doesn't
* allow to access certificate later from SSL_CTX, so we reimplement
* it here
*/
bio = BIO_new_file((char *) cert->data, "r");
if (bio == NULL) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"BIO_new_file(\"%s\") failed", cert->data);
return NGX_ERROR;
}
x509 = PEM_read_bio_X509_AUX(bio, NULL, NULL, NULL);
if (x509 == NULL) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"PEM_read_bio_X509_AUX(\"%s\") failed", cert->data);
BIO_free(bio);
return NGX_ERROR;
}
if (SSL_CTX_use_certificate(ssl->ctx, x509) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_use_certificate(\"%s\") failed", cert->data);
X509_free(x509);
BIO_free(bio);
return NGX_ERROR;
}
if (X509_set_ex_data(x509, ngx_ssl_certificate_name_index, cert->data)
== 0)
{
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "X509_set_ex_data() failed");
X509_free(x509);
BIO_free(bio);
return NGX_ERROR;
}
if (X509_set_ex_data(x509, ngx_ssl_next_certificate_index,
SSL_CTX_get_ex_data(ssl->ctx, ngx_ssl_certificate_index))
== 0)
{
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "X509_set_ex_data() failed");
X509_free(x509);
BIO_free(bio);
return NGX_ERROR;
}
if (SSL_CTX_set_ex_data(ssl->ctx, ngx_ssl_certificate_index, x509)
== 0)
{
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_set_ex_data() failed");
X509_free(x509);
BIO_free(bio);
return NGX_ERROR;
}
/* read rest of the chain */
for ( ;; ) {
x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
if (x509 == NULL) {
n = ERR_peek_last_error();
if (ERR_GET_LIB(n) == ERR_LIB_PEM
&& ERR_GET_REASON(n) == PEM_R_NO_START_LINE)
{
/* end of file */
ERR_clear_error();
break;
}
/* some real error */
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"PEM_read_bio_X509(\"%s\") failed", cert->data);
BIO_free(bio);
return NGX_ERROR;
}
#ifdef SSL_CTRL_CHAIN_CERT
/*
* SSL_CTX_add0_chain_cert() is needed to add chain to
* a particular certificate when multiple certificates are used;
* only available in OpenSSL 1.0.2+
*/
if (SSL_CTX_add0_chain_cert(ssl->ctx, x509) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_add0_chain_cert(\"%s\") failed",
cert->data);
X509_free(x509);
BIO_free(bio);
return NGX_ERROR;
}
#else
if (SSL_CTX_add_extra_chain_cert(ssl->ctx, x509) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_add_extra_chain_cert(\"%s\") failed",
cert->data);
X509_free(x509);
BIO_free(bio);
return NGX_ERROR;
}
#endif
}
BIO_free(bio);
if (ngx_strncmp(key->data, "engine:", sizeof("engine:") - 1) == 0) {
#ifndef OPENSSL_NO_ENGINE
u_char *p, *last;
ENGINE *engine;
EVP_PKEY *pkey;
p = key->data + sizeof("engine:") - 1;
last = (u_char *) ngx_strchr(p, ':');
if (last == NULL) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid syntax in \"%V\"", key);
return NGX_ERROR;
}
*last = '\0';
engine = ENGINE_by_id((char *) p);
if (engine == NULL) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"ENGINE_by_id(\"%s\") failed", p);
return NGX_ERROR;
}
*last++ = ':';
pkey = ENGINE_load_private_key(engine, (char *) last, 0, 0);
if (pkey == NULL) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"ENGINE_load_private_key(\"%s\") failed", last);
ENGINE_free(engine);
return NGX_ERROR;
}
ENGINE_free(engine);
if (SSL_CTX_use_PrivateKey(ssl->ctx, pkey) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_use_PrivateKey(\"%s\") failed", last);
EVP_PKEY_free(pkey);
return NGX_ERROR;
}
EVP_PKEY_free(pkey);
return NGX_OK;
#else
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"loading \"engine:...\" certificate keys "
"is not supported");
return NGX_ERROR;
#endif
}
if (ngx_conf_full_name(cf->cycle, key, 1) != NGX_OK) {
return NGX_ERROR;
}
if (passwords) {
tries = passwords->nelts;
pwd = passwords->elts;
SSL_CTX_set_default_passwd_cb(ssl->ctx, ngx_ssl_password_callback);
SSL_CTX_set_default_passwd_cb_userdata(ssl->ctx, pwd);
} else {
tries = 1;
#if (NGX_SUPPRESS_WARN)
pwd = NULL;
#endif
}
for ( ;; ) {
if (SSL_CTX_use_PrivateKey_file(ssl->ctx, (char *) key->data,
SSL_FILETYPE_PEM)
!= 0)
{
break;
}
if (--tries) {
ERR_clear_error();
SSL_CTX_set_default_passwd_cb_userdata(ssl->ctx, ++pwd);
continue;
}
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_use_PrivateKey_file(\"%s\") failed", key->data);
return NGX_ERROR;
}
SSL_CTX_set_default_passwd_cb(ssl->ctx, NULL);
return NGX_OK;
}
static int
ngx_ssl_password_callback(char *buf, int size, int rwflag, void *userdata)
{
ngx_str_t *pwd = userdata;
if (rwflag) {
ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
"ngx_ssl_password_callback() is called for encryption");
return 0;
}
if (pwd->len > (size_t) size) {
ngx_log_error(NGX_LOG_ERR, ngx_cycle->log, 0,
"password is truncated to %d bytes", size);
} else {
size = pwd->len;
}
ngx_memcpy(buf, pwd->data, size);
return size;
}
ngx_int_t
ngx_ssl_ciphers(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *ciphers,
ngx_uint_t prefer_server_ciphers)
{
if (SSL_CTX_set_cipher_list(ssl->ctx, (char *) ciphers->data) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_set_cipher_list(\"%V\") failed",
ciphers);
return NGX_ERROR;
}
if (prefer_server_ciphers) {
SSL_CTX_set_options(ssl->ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
}
#if (OPENSSL_VERSION_NUMBER < 0x10100001L && !defined LIBRESSL_VERSION_NUMBER)
/* a temporary 512-bit RSA key is required for export versions of MSIE */
SSL_CTX_set_tmp_rsa_callback(ssl->ctx, ngx_ssl_rsa512_key_callback);
#endif
return NGX_OK;
}
ngx_int_t
ngx_ssl_client_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert,
ngx_int_t depth)
{
STACK_OF(X509_NAME) *list;
SSL_CTX_set_verify(ssl->ctx, SSL_VERIFY_PEER, ngx_ssl_verify_callback);
SSL_CTX_set_verify_depth(ssl->ctx, depth);
if (cert->len == 0) {
return NGX_OK;
}
if (ngx_conf_full_name(cf->cycle, cert, 1) != NGX_OK) {
return NGX_ERROR;
}
if (SSL_CTX_load_verify_locations(ssl->ctx, (char *) cert->data, NULL)
== 0)
{
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_load_verify_locations(\"%s\") failed",
cert->data);
return NGX_ERROR;
}
/*
* SSL_CTX_load_verify_locations() may leave errors in the error queue
* while returning success
*/
ERR_clear_error();
list = SSL_load_client_CA_file((char *) cert->data);
if (list == NULL) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_load_client_CA_file(\"%s\") failed", cert->data);
return NGX_ERROR;
}
/*
* before 0.9.7h and 0.9.8 SSL_load_client_CA_file()
* always leaved an error in the error queue
*/
ERR_clear_error();
SSL_CTX_set_client_CA_list(ssl->ctx, list);
return NGX_OK;
}
ngx_int_t
ngx_ssl_trusted_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert,
ngx_int_t depth)
{
SSL_CTX_set_verify_depth(ssl->ctx, depth);
if (cert->len == 0) {
return NGX_OK;
}
if (ngx_conf_full_name(cf->cycle, cert, 1) != NGX_OK) {
return NGX_ERROR;
}
if (SSL_CTX_load_verify_locations(ssl->ctx, (char *) cert->data, NULL)
== 0)
{
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_load_verify_locations(\"%s\") failed",
cert->data);
return NGX_ERROR;
}
/*
* SSL_CTX_load_verify_locations() may leave errors in the error queue
* while returning success
*/
ERR_clear_error();
return NGX_OK;
}
ngx_int_t
ngx_ssl_crl(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *crl)
{
X509_STORE *store;
X509_LOOKUP *lookup;
if (crl->len == 0) {
return NGX_OK;
}
if (ngx_conf_full_name(cf->cycle, crl, 1) != NGX_OK) {
return NGX_ERROR;
}
store = SSL_CTX_get_cert_store(ssl->ctx);
if (store == NULL) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_get_cert_store() failed");
return NGX_ERROR;
}
lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file());
if (lookup == NULL) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"X509_STORE_add_lookup() failed");
return NGX_ERROR;
}
if (X509_LOOKUP_load_file(lookup, (char *) crl->data, X509_FILETYPE_PEM)
== 0)
{
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"X509_LOOKUP_load_file(\"%s\") failed", crl->data);
return NGX_ERROR;
}
X509_STORE_set_flags(store,
X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL);
return NGX_OK;
}
static int
ngx_ssl_verify_callback(int ok, X509_STORE_CTX *x509_store)
{
#if (NGX_DEBUG)
char *subject, *issuer;
int err, depth;
X509 *cert;
X509_NAME *sname, *iname;
ngx_connection_t *c;
ngx_ssl_conn_t *ssl_conn;
ssl_conn = X509_STORE_CTX_get_ex_data(x509_store,
SSL_get_ex_data_X509_STORE_CTX_idx());
c = ngx_ssl_get_connection(ssl_conn);
cert = X509_STORE_CTX_get_current_cert(x509_store);
err = X509_STORE_CTX_get_error(x509_store);
depth = X509_STORE_CTX_get_error_depth(x509_store);
sname = X509_get_subject_name(cert);
subject = sname ? X509_NAME_oneline(sname, NULL, 0) : "(none)";
iname = X509_get_issuer_name(cert);
issuer = iname ? X509_NAME_oneline(iname, NULL, 0) : "(none)";
ngx_log_debug5(NGX_LOG_DEBUG_EVENT, c->log, 0,
"verify:%d, error:%d, depth:%d, "
"subject:\"%s\", issuer:\"%s\"",
ok, err, depth, subject, issuer);
if (sname) {
OPENSSL_free(subject);
}
if (iname) {
OPENSSL_free(issuer);
}
#endif
return 1;
}
static void
ngx_ssl_info_callback(const ngx_ssl_conn_t *ssl_conn, int where, int ret)
{
BIO *rbio, *wbio;
ngx_connection_t *c;
if (where & SSL_CB_HANDSHAKE_START) {
c = ngx_ssl_get_connection((ngx_ssl_conn_t *) ssl_conn);
if (c->ssl->handshaked) {
c->ssl->renegotiation = 1;
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL renegotiation");
}
}
if ((where & SSL_CB_ACCEPT_LOOP) == SSL_CB_ACCEPT_LOOP) {
c = ngx_ssl_get_connection((ngx_ssl_conn_t *) ssl_conn);
if (!c->ssl->handshake_buffer_set) {
/*
* By default OpenSSL uses 4k buffer during a handshake,
* which is too low for long certificate chains and might
* result in extra round-trips.
*
* To adjust a buffer size we detect that buffering was added
* to write side of the connection by comparing rbio and wbio.
* If they are different, we assume that it's due to buffering
* added to wbio, and set buffer size.
*/
rbio = SSL_get_rbio((ngx_ssl_conn_t *) ssl_conn);
wbio = SSL_get_wbio((ngx_ssl_conn_t *) ssl_conn);
if (rbio != wbio) {
(void) BIO_set_write_buffer_size(wbio, NGX_SSL_BUFSIZE);
c->ssl->handshake_buffer_set = 1;
}
}
}
}
RSA *
ngx_ssl_rsa512_key_callback(ngx_ssl_conn_t *ssl_conn, int is_export,
int key_length)
{
static RSA *key;
if (key_length != 512) {
return NULL;
}
#if (OPENSSL_VERSION_NUMBER < 0x10100003L && !defined OPENSSL_NO_DEPRECATED)
if (key == NULL) {
key = RSA_generate_key(512, RSA_F4, NULL, NULL);
}
#endif
return key;
}
ngx_array_t *
ngx_ssl_read_password_file(ngx_conf_t *cf, ngx_str_t *file)
{
u_char *p, *last, *end;
size_t len;
ssize_t n;
ngx_fd_t fd;
ngx_str_t *pwd;
ngx_array_t *passwords;
ngx_pool_cleanup_t *cln;
u_char buf[NGX_SSL_PASSWORD_BUFFER_SIZE];
if (ngx_conf_full_name(cf->cycle, file, 1) != NGX_OK) {
return NULL;
}
cln = ngx_pool_cleanup_add(cf->temp_pool, 0);
passwords = ngx_array_create(cf->temp_pool, 4, sizeof(ngx_str_t));
if (cln == NULL || passwords == NULL) {
return NULL;
}
cln->handler = ngx_ssl_passwords_cleanup;
cln->data = passwords;
fd = ngx_open_file(file->data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
ngx_open_file_n " \"%s\" failed", file->data);
return NULL;
}
len = 0;
last = buf;
do {
n = ngx_read_fd(fd, last, NGX_SSL_PASSWORD_BUFFER_SIZE - len);
if (n == -1) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
ngx_read_fd_n " \"%s\" failed", file->data);
passwords = NULL;
goto cleanup;
}
end = last + n;
if (len && n == 0) {
*end++ = LF;
}
p = buf;
for ( ;; ) {
last = ngx_strlchr(last, end, LF);
if (last == NULL) {
break;
}
len = last++ - p;
if (len && p[len - 1] == CR) {
len--;
}
if (len) {
pwd = ngx_array_push(passwords);
if (pwd == NULL) {
passwords = NULL;
goto cleanup;
}
pwd->len = len;
pwd->data = ngx_pnalloc(cf->temp_pool, len);
if (pwd->data == NULL) {
passwords->nelts--;
passwords = NULL;
goto cleanup;
}
ngx_memcpy(pwd->data, p, len);
}
p = last;
}
len = end - p;
if (len == NGX_SSL_PASSWORD_BUFFER_SIZE) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"too long line in \"%s\"", file->data);
passwords = NULL;
goto cleanup;
}
ngx_memmove(buf, p, len);
last = buf + len;
} while (n != 0);
if (passwords->nelts == 0) {
pwd = ngx_array_push(passwords);
if (pwd == NULL) {
passwords = NULL;
goto cleanup;
}
ngx_memzero(pwd, sizeof(ngx_str_t));
}
cleanup:
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_conf_log_error(NGX_LOG_ALERT, cf, ngx_errno,
ngx_close_file_n " \"%s\" failed", file->data);
}
ngx_memzero(buf, NGX_SSL_PASSWORD_BUFFER_SIZE);
return passwords;
}
static void
ngx_ssl_passwords_cleanup(void *data)
{
ngx_array_t *passwords = data;
ngx_str_t *pwd;
ngx_uint_t i;
pwd = passwords->elts;
for (i = 0; i < passwords->nelts; i++) {
ngx_memzero(pwd[i].data, pwd[i].len);
}
}
ngx_int_t
ngx_ssl_dhparam(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *file)
{
DH *dh;
BIO *bio;
if (file->len == 0) {
return NGX_OK;
}
if (ngx_conf_full_name(cf->cycle, file, 1) != NGX_OK) {
return NGX_ERROR;
}
bio = BIO_new_file((char *) file->data, "r");
if (bio == NULL) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"BIO_new_file(\"%s\") failed", file->data);
return NGX_ERROR;
}
dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
if (dh == NULL) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"PEM_read_bio_DHparams(\"%s\") failed", file->data);
BIO_free(bio);
return NGX_ERROR;
}
SSL_CTX_set_tmp_dh(ssl->ctx, dh);
DH_free(dh);
BIO_free(bio);
return NGX_OK;
}
ngx_int_t
ngx_ssl_ecdh_curve(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *name)
{
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
#ifndef OPENSSL_NO_ECDH
/*
* Elliptic-Curve Diffie-Hellman parameters are either "named curves"
* from RFC 4492 section 5.1.1, or explicitly described curves over
* binary fields. OpenSSL only supports the "named curves", which provide
* maximum interoperability.
*/
#ifdef SSL_CTRL_SET_CURVES_LIST
/*
* OpenSSL 1.0.2+ allows configuring a curve list instead of a single
* curve previously supported. By default an internal list is used,
* with prime256v1 being preferred by server in OpenSSL 1.0.2b+
* and X25519 in OpenSSL 1.1.0+.
*
* By default a curve preferred by the client will be used for
* key exchange. The SSL_OP_CIPHER_SERVER_PREFERENCE option can
* be used to prefer server curves instead, similar to what it
* does for ciphers.
*/
SSL_CTX_set_options(ssl->ctx, SSL_OP_SINGLE_ECDH_USE);
#if SSL_CTRL_SET_ECDH_AUTO
/* not needed in OpenSSL 1.1.0+ */
SSL_CTX_set_ecdh_auto(ssl->ctx, 1);
#endif
if (ngx_strcmp(name->data, "auto") == 0) {
return NGX_OK;
}
if (SSL_CTX_set1_curves_list(ssl->ctx, (char *) name->data) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_set1_curves_list(\"%s\") failed", name->data);
return NGX_ERROR;
}
#else
int nid;
char *curve;
EC_KEY *ecdh;
if (ngx_strcmp(name->data, "auto") == 0) {
curve = "prime256v1";
} else {
curve = (char *) name->data;
}
nid = OBJ_sn2nid(curve);
if (nid == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"OBJ_sn2nid(\"%s\") failed: unknown curve", curve);
return NGX_ERROR;
}
ecdh = EC_KEY_new_by_curve_name(nid);
if (ecdh == NULL) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"EC_KEY_new_by_curve_name(\"%s\") failed", curve);
return NGX_ERROR;
}
SSL_CTX_set_options(ssl->ctx, SSL_OP_SINGLE_ECDH_USE);
SSL_CTX_set_tmp_ecdh(ssl->ctx, ecdh);
EC_KEY_free(ecdh);
#endif
#endif
#endif
return NGX_OK;
}
ngx_int_t
ngx_ssl_create_connection(ngx_ssl_t *ssl, ngx_connection_t *c, ngx_uint_t flags)
{
ngx_ssl_connection_t *sc;
sc = ngx_pcalloc(c->pool, sizeof(ngx_ssl_connection_t));
if (sc == NULL) {
return NGX_ERROR;
}
sc->buffer = ((flags & NGX_SSL_BUFFER) != 0);
sc->buffer_size = ssl->buffer_size;
sc->session_ctx = ssl->ctx;
sc->connection = SSL_new(ssl->ctx);
if (sc->connection == NULL) {
ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "SSL_new() failed");
return NGX_ERROR;
}
if (SSL_set_fd(sc->connection, c->fd) == 0) {
ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "SSL_set_fd() failed");
return NGX_ERROR;
}
if (flags & NGX_SSL_CLIENT) {
SSL_set_connect_state(sc->connection);
} else {
SSL_set_accept_state(sc->connection);
}
if (SSL_set_ex_data(sc->connection, ngx_ssl_connection_index, c) == 0) {
ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "SSL_set_ex_data() failed");
return NGX_ERROR;
}
c->ssl = sc;
return NGX_OK;
}
ngx_int_t
ngx_ssl_set_session(ngx_connection_t *c, ngx_ssl_session_t *session)
{
if (session) {
if (SSL_set_session(c->ssl->connection, session) == 0) {
ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "SSL_set_session() failed");
return NGX_ERROR;
}
}
return NGX_OK;
}
ngx_int_t
ngx_ssl_handshake(ngx_connection_t *c)
{
int n, sslerr;
ngx_err_t err;
ngx_ssl_clear_error(c->log);
n = SSL_do_handshake(c->ssl->connection);
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_do_handshake: %d", n);
if (n == 1) {
if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
return NGX_ERROR;
}
if (ngx_handle_write_event(c->write, 0) != NGX_OK) {
return NGX_ERROR;
}
#if (NGX_DEBUG)
{
char buf[129], *s, *d;
#if OPENSSL_VERSION_NUMBER >= 0x10000000L
const
#endif
SSL_CIPHER *cipher;
cipher = SSL_get_current_cipher(c->ssl->connection);
if (cipher) {
SSL_CIPHER_description(cipher, &buf[1], 128);
for (s = &buf[1], d = buf; *s; s++) {
if (*s == ' ' && *d == ' ') {
continue;
}
if (*s == LF || *s == CR) {
continue;
}
*++d = *s;
}
if (*d != ' ') {
d++;
}
*d = '\0';
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
"SSL: %s, cipher: \"%s\"",
SSL_get_version(c->ssl->connection), &buf[1]);
if (SSL_session_reused(c->ssl->connection)) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
"SSL reused session");
}
} else {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
"SSL no shared ciphers");
}
}
#endif
c->ssl->handshaked = 1;
c->recv = ngx_ssl_recv;
c->send = ngx_ssl_write;
c->recv_chain = ngx_ssl_recv_chain;
c->send_chain = ngx_ssl_send_chain;
#if OPENSSL_VERSION_NUMBER < 0x10100000L
#ifdef SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS
/* initial handshake done, disable renegotiation (CVE-2009-3555) */
if (c->ssl->connection->s3) {
c->ssl->connection->s3->flags |= SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS;
}
#endif
#endif
return NGX_OK;
}
sslerr = SSL_get_error(c->ssl->connection, n);
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_get_error: %d", sslerr);
if (sslerr == SSL_ERROR_WANT_READ) {
c->read->ready = 0;
c->read->handler = ngx_ssl_handshake_handler;
c->write->handler = ngx_ssl_handshake_handler;
if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
return NGX_ERROR;
}
if (ngx_handle_write_event(c->write, 0) != NGX_OK) {
return NGX_ERROR;
}
return NGX_AGAIN;
}
if (sslerr == SSL_ERROR_WANT_WRITE) {
c->write->ready = 0;
c->read->handler = ngx_ssl_handshake_handler;
c->write->handler = ngx_ssl_handshake_handler;
if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
return NGX_ERROR;
}
if (ngx_handle_write_event(c->write, 0) != NGX_OK) {
return NGX_ERROR;
}
return NGX_AGAIN;
}
err = (sslerr == SSL_ERROR_SYSCALL) ? ngx_errno : 0;
c->ssl->no_wait_shutdown = 1;
c->ssl->no_send_shutdown = 1;
c->read->eof = 1;
if (sslerr == SSL_ERROR_ZERO_RETURN || ERR_peek_error() == 0) {
ngx_connection_error(c, err,
"peer closed connection in SSL handshake");
return NGX_ERROR;
}
c->read->error = 1;
ngx_ssl_connection_error(c, sslerr, err, "SSL_do_handshake() failed");
return NGX_ERROR;
}
static void
ngx_ssl_handshake_handler(ngx_event_t *ev)
{
ngx_connection_t *c;
c = ev->data;
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
"SSL handshake handler: %d", ev->write);
if (ev->timedout) {
c->ssl->handler(c);
return;
}
if (ngx_ssl_handshake(c) == NGX_AGAIN) {
return;
}
c->ssl->handler(c);
}
ssize_t
ngx_ssl_recv_chain(ngx_connection_t *c, ngx_chain_t *cl, off_t limit)
{
u_char *last;
ssize_t n, bytes, size;
ngx_buf_t *b;
bytes = 0;
b = cl->buf;
last = b->last;
for ( ;; ) {
size = b->end - last;
if (limit) {
if (bytes >= limit) {
return bytes;
}
if (bytes + size > limit) {
size = (ssize_t) (limit - bytes);
}
}
n = ngx_ssl_recv(c, last, size);
if (n > 0) {
last += n;
bytes += n;
if (last == b->end) {
cl = cl->next;
if (cl == NULL) {
return bytes;
}
b = cl->buf;
last = b->last;
}
continue;
}
if (bytes) {
if (n == 0 || n == NGX_ERROR) {
c->read->ready = 1;
}
return bytes;
}
return n;
}
}
ssize_t
ngx_ssl_recv(ngx_connection_t *c, u_char *buf, size_t size)
{
int n, bytes;
if (c->ssl->last == NGX_ERROR) {
c->read->error = 1;
return NGX_ERROR;
}
if (c->ssl->last == NGX_DONE) {
c->read->ready = 0;
c->read->eof = 1;
return 0;
}
bytes = 0;
ngx_ssl_clear_error(c->log);
/*
* SSL_read() may return data in parts, so try to read
* until SSL_read() would return no data
*/
for ( ;; ) {
n = SSL_read(c->ssl->connection, buf, size);
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_read: %d", n);
if (n > 0) {
bytes += n;
}
c->ssl->last = ngx_ssl_handle_recv(c, n);
if (c->ssl->last == NGX_OK) {
size -= n;
if (size == 0) {
c->read->ready = 1;
return bytes;
}
buf += n;
continue;
}
if (bytes) {
if (c->ssl->last != NGX_AGAIN) {
c->read->ready = 1;
}
return bytes;
}
switch (c->ssl->last) {
case NGX_DONE:
c->read->ready = 0;
c->read->eof = 1;
return 0;
case NGX_ERROR:
c->read->error = 1;
/* fall through */
case NGX_AGAIN:
return c->ssl->last;
}
}
}
static ngx_int_t
ngx_ssl_handle_recv(ngx_connection_t *c, int n)
{
int sslerr;
ngx_err_t err;
if (c->ssl->renegotiation) {
/*
* disable renegotiation (CVE-2009-3555):
* OpenSSL (at least up to 0.9.8l) does not handle disabled
* renegotiation gracefully, so drop connection here
*/
ngx_log_error(NGX_LOG_NOTICE, c->log, 0, "SSL renegotiation disabled");
while (ERR_peek_error()) {
ngx_ssl_error(NGX_LOG_DEBUG, c->log, 0,
"ignoring stale global SSL error");
}
ERR_clear_error();
c->ssl->no_wait_shutdown = 1;
c->ssl->no_send_shutdown = 1;
return NGX_ERROR;
}
if (n > 0) {
if (c->ssl->saved_write_handler) {
c->write->handler = c->ssl->saved_write_handler;
c->ssl->saved_write_handler = NULL;
c->write->ready = 1;
if (ngx_handle_write_event(c->write, 0) != NGX_OK) {
return NGX_ERROR;
}
ngx_post_event(c->write, &ngx_posted_events);
}
return NGX_OK;
}
sslerr = SSL_get_error(c->ssl->connection, n);
err = (sslerr == SSL_ERROR_SYSCALL) ? ngx_errno : 0;
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_get_error: %d", sslerr);
if (sslerr == SSL_ERROR_WANT_READ) {
c->read->ready = 0;
return NGX_AGAIN;
}
if (sslerr == SSL_ERROR_WANT_WRITE) {
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"peer started SSL renegotiation");
c->write->ready = 0;
if (ngx_handle_write_event(c->write, 0) != NGX_OK) {
return NGX_ERROR;
}
/*
* we do not set the timer because there is already the read event timer
*/
if (c->ssl->saved_write_handler == NULL) {
c->ssl->saved_write_handler = c->write->handler;
c->write->handler = ngx_ssl_write_handler;
}
return NGX_AGAIN;
}
c->ssl->no_wait_shutdown = 1;
c->ssl->no_send_shutdown = 1;
if (sslerr == SSL_ERROR_ZERO_RETURN || ERR_peek_error() == 0) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
"peer shutdown SSL cleanly");
return NGX_DONE;
}
ngx_ssl_connection_error(c, sslerr, err, "SSL_read() failed");
return NGX_ERROR;
}
static void
ngx_ssl_write_handler(ngx_event_t *wev)
{
ngx_connection_t *c;
c = wev->data;
c->read->handler(c->read);
}
/*
* OpenSSL has no SSL_writev() so we copy several bufs into our 16K buffer
* before the SSL_write() call to decrease a SSL overhead.
*
* Besides for protocols such as HTTP it is possible to always buffer
* the output to decrease a SSL overhead some more.
*/
ngx_chain_t *
ngx_ssl_send_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
{
int n;
ngx_uint_t flush;
ssize_t send, size;
ngx_buf_t *buf;
if (!c->ssl->buffer) {
while (in) {
if (ngx_buf_special(in->buf)) {
in = in->next;
continue;
}
n = ngx_ssl_write(c, in->buf->pos, in->buf->last - in->buf->pos);
if (n == NGX_ERROR) {
return NGX_CHAIN_ERROR;
}
if (n == NGX_AGAIN) {
return in;
}
in->buf->pos += n;
if (in->buf->pos == in->buf->last) {
in = in->next;
}
}
return in;
}
/* the maximum limit size is the maximum int32_t value - the page size */
if (limit == 0 || limit > (off_t) (NGX_MAX_INT32_VALUE - ngx_pagesize)) {
limit = NGX_MAX_INT32_VALUE - ngx_pagesize;
}
buf = c->ssl->buf;
if (buf == NULL) {
buf = ngx_create_temp_buf(c->pool, c->ssl->buffer_size);
if (buf == NULL) {
return NGX_CHAIN_ERROR;
}
c->ssl->buf = buf;
}
if (buf->start == NULL) {
buf->start = ngx_palloc(c->pool, c->ssl->buffer_size);
if (buf->start == NULL) {
return NGX_CHAIN_ERROR;
}
buf->pos = buf->start;
buf->last = buf->start;
buf->end = buf->start + c->ssl->buffer_size;
}
send = buf->last - buf->pos;
flush = (in == NULL) ? 1 : buf->flush;
for ( ;; ) {
while (in && buf->last < buf->end && send < limit) {
if (in->buf->last_buf || in->buf->flush) {
flush = 1;
}
if (ngx_buf_special(in->buf)) {
in = in->next;
continue;
}
size = in->buf->last - in->buf->pos;
if (size > buf->end - buf->last) {
size = buf->end - buf->last;
}
if (send + size > limit) {
size = (ssize_t) (limit - send);
}
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
"SSL buf copy: %z", size);
ngx_memcpy(buf->last, in->buf->pos, size);
buf->last += size;
in->buf->pos += size;
send += size;
if (in->buf->pos == in->buf->last) {
in = in->next;
}
}
if (!flush && send < limit && buf->last < buf->end) {
break;
}
size = buf->last - buf->pos;
if (size == 0) {
buf->flush = 0;
c->buffered &= ~NGX_SSL_BUFFERED;
return in;
}
n = ngx_ssl_write(c, buf->pos, size);
if (n == NGX_ERROR) {
return NGX_CHAIN_ERROR;
}
if (n == NGX_AGAIN) {
break;
}
buf->pos += n;
if (n < size) {
break;
}
flush = 0;
buf->pos = buf->start;
buf->last = buf->start;
if (in == NULL || send == limit) {
break;
}
}
buf->flush = flush;
if (buf->pos < buf->last) {
c->buffered |= NGX_SSL_BUFFERED;
} else {
c->buffered &= ~NGX_SSL_BUFFERED;
}
return in;
}
ssize_t
ngx_ssl_write(ngx_connection_t *c, u_char *data, size_t size)
{
int n, sslerr;
ngx_err_t err;
ngx_ssl_clear_error(c->log);
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL to write: %uz", size);
n = SSL_write(c->ssl->connection, data, size);
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_write: %d", n);
if (n > 0) {
if (c->ssl->saved_read_handler) {
c->read->handler = c->ssl->saved_read_handler;
c->ssl->saved_read_handler = NULL;
c->read->ready = 1;
if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
return NGX_ERROR;
}
ngx_post_event(c->read, &ngx_posted_events);
}
c->sent += n;
return n;
}
sslerr = SSL_get_error(c->ssl->connection, n);
err = (sslerr == SSL_ERROR_SYSCALL) ? ngx_errno : 0;
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_get_error: %d", sslerr);
if (sslerr == SSL_ERROR_WANT_WRITE) {
c->write->ready = 0;
return NGX_AGAIN;
}
if (sslerr == SSL_ERROR_WANT_READ) {
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"peer started SSL renegotiation");
c->read->ready = 0;
if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
return NGX_ERROR;
}
/*
* we do not set the timer because there is already
* the write event timer
*/
if (c->ssl->saved_read_handler == NULL) {
c->ssl->saved_read_handler = c->read->handler;
c->read->handler = ngx_ssl_read_handler;
}
return NGX_AGAIN;
}
c->ssl->no_wait_shutdown = 1;
c->ssl->no_send_shutdown = 1;
c->write->error = 1;
ngx_ssl_connection_error(c, sslerr, err, "SSL_write() failed");
return NGX_ERROR;
}
static void
ngx_ssl_read_handler(ngx_event_t *rev)
{
ngx_connection_t *c;
c = rev->data;
c->write->handler(c->write);
}
void
ngx_ssl_free_buffer(ngx_connection_t *c)
{
if (c->ssl->buf && c->ssl->buf->start) {
if (ngx_pfree(c->pool, c->ssl->buf->start) == NGX_OK) {
c->ssl->buf->start = NULL;
}
}
}
ngx_int_t
ngx_ssl_shutdown(ngx_connection_t *c)
{
int n, sslerr, mode;
ngx_err_t err;
if (SSL_in_init(c->ssl->connection)) {
/*
* OpenSSL 1.0.2f complains if SSL_shutdown() is called during
* an SSL handshake, while previous versions always return 0.
* Avoid calling SSL_shutdown() if handshake wasn't completed.
*/
SSL_free(c->ssl->connection);
c->ssl = NULL;
return NGX_OK;
}
if (c->timedout) {
mode = SSL_RECEIVED_SHUTDOWN|SSL_SENT_SHUTDOWN;
SSL_set_quiet_shutdown(c->ssl->connection, 1);
} else {
mode = SSL_get_shutdown(c->ssl->connection);
if (c->ssl->no_wait_shutdown) {
mode |= SSL_RECEIVED_SHUTDOWN;
}
if (c->ssl->no_send_shutdown) {
mode |= SSL_SENT_SHUTDOWN;
}
if (c->ssl->no_wait_shutdown && c->ssl->no_send_shutdown) {
SSL_set_quiet_shutdown(c->ssl->connection, 1);
}
}
SSL_set_shutdown(c->ssl->connection, mode);
ngx_ssl_clear_error(c->log);
n = SSL_shutdown(c->ssl->connection);
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_shutdown: %d", n);
sslerr = 0;
/* before 0.9.8m SSL_shutdown() returned 0 instead of -1 on errors */
if (n != 1 && ERR_peek_error()) {
sslerr = SSL_get_error(c->ssl->connection, n);
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
"SSL_get_error: %d", sslerr);
}
if (n == 1 || sslerr == 0 || sslerr == SSL_ERROR_ZERO_RETURN) {
SSL_free(c->ssl->connection);
c->ssl = NULL;
return NGX_OK;
}
if (sslerr == SSL_ERROR_WANT_READ || sslerr == SSL_ERROR_WANT_WRITE) {
c->read->handler = ngx_ssl_shutdown_handler;
c->write->handler = ngx_ssl_shutdown_handler;
if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
return NGX_ERROR;
}
if (ngx_handle_write_event(c->write, 0) != NGX_OK) {
return NGX_ERROR;
}
if (sslerr == SSL_ERROR_WANT_READ) {
ngx_add_timer(c->read, 30000);
}
return NGX_AGAIN;
}
err = (sslerr == SSL_ERROR_SYSCALL) ? ngx_errno : 0;
ngx_ssl_connection_error(c, sslerr, err, "SSL_shutdown() failed");
SSL_free(c->ssl->connection);
c->ssl = NULL;
return NGX_ERROR;
}
static void
ngx_ssl_shutdown_handler(ngx_event_t *ev)
{
ngx_connection_t *c;
ngx_connection_handler_pt handler;
c = ev->data;
handler = c->ssl->handler;
if (ev->timedout) {
c->timedout = 1;
}
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0, "SSL shutdown handler");
if (ngx_ssl_shutdown(c) == NGX_AGAIN) {
return;
}
handler(c);
}
static void
ngx_ssl_connection_error(ngx_connection_t *c, int sslerr, ngx_err_t err,
char *text)
{
int n;
ngx_uint_t level;
level = NGX_LOG_CRIT;
if (sslerr == SSL_ERROR_SYSCALL) {
if (err == NGX_ECONNRESET
|| err == NGX_EPIPE
|| err == NGX_ENOTCONN
|| err == NGX_ETIMEDOUT
|| err == NGX_ECONNREFUSED
|| err == NGX_ENETDOWN
|| err == NGX_ENETUNREACH
|| err == NGX_EHOSTDOWN
|| err == NGX_EHOSTUNREACH)
{
switch (c->log_error) {
case NGX_ERROR_IGNORE_ECONNRESET:
case NGX_ERROR_INFO:
level = NGX_LOG_INFO;
break;
case NGX_ERROR_ERR:
level = NGX_LOG_ERR;
break;
default:
break;
}
}
} else if (sslerr == SSL_ERROR_SSL) {
n = ERR_GET_REASON(ERR_peek_error());
/* handshake failures */
if (n == SSL_R_BAD_CHANGE_CIPHER_SPEC /* 103 */
|| n == SSL_R_BLOCK_CIPHER_PAD_IS_WRONG /* 129 */
|| n == SSL_R_DIGEST_CHECK_FAILED /* 149 */
|| n == SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST /* 151 */
|| n == SSL_R_EXCESSIVE_MESSAGE_SIZE /* 152 */
|| n == SSL_R_LENGTH_MISMATCH /* 159 */
#ifdef SSL_R_NO_CIPHERS_PASSED
|| n == SSL_R_NO_CIPHERS_PASSED /* 182 */
#endif
|| n == SSL_R_NO_CIPHERS_SPECIFIED /* 183 */
|| n == SSL_R_NO_COMPRESSION_SPECIFIED /* 187 */
|| n == SSL_R_NO_SHARED_CIPHER /* 193 */
|| n == SSL_R_RECORD_LENGTH_MISMATCH /* 213 */
#ifdef SSL_R_PARSE_TLSEXT
|| n == SSL_R_PARSE_TLSEXT /* 227 */
#endif
|| n == SSL_R_UNEXPECTED_MESSAGE /* 244 */
|| n == SSL_R_UNEXPECTED_RECORD /* 245 */
|| n == SSL_R_UNKNOWN_ALERT_TYPE /* 246 */
|| n == SSL_R_UNKNOWN_PROTOCOL /* 252 */
|| n == SSL_R_WRONG_VERSION_NUMBER /* 267 */
|| n == SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC /* 281 */
#ifdef SSL_R_RENEGOTIATE_EXT_TOO_LONG
|| n == SSL_R_RENEGOTIATE_EXT_TOO_LONG /* 335 */
|| n == SSL_R_RENEGOTIATION_ENCODING_ERR /* 336 */
|| n == SSL_R_RENEGOTIATION_MISMATCH /* 337 */
#endif
#ifdef SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED
|| n == SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED /* 338 */
#endif
#ifdef SSL_R_NO_RENEGOTIATION
|| n == SSL_R_NO_RENEGOTIATION /* 339 */
#endif
#ifdef SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING
|| n == SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING /* 345 */
#endif
#ifdef SSL_R_INAPPROPRIATE_FALLBACK
|| n == SSL_R_INAPPROPRIATE_FALLBACK /* 373 */
#endif
|| n == 1000 /* SSL_R_SSLV3_ALERT_CLOSE_NOTIFY */
#ifdef SSL_R_SSLV3_ALERT_UNEXPECTED_MESSAGE
|| n == SSL_R_SSLV3_ALERT_UNEXPECTED_MESSAGE /* 1010 */
|| n == SSL_R_SSLV3_ALERT_BAD_RECORD_MAC /* 1020 */
|| n == SSL_R_TLSV1_ALERT_DECRYPTION_FAILED /* 1021 */
|| n == SSL_R_TLSV1_ALERT_RECORD_OVERFLOW /* 1022 */
|| n == SSL_R_SSLV3_ALERT_DECOMPRESSION_FAILURE /* 1030 */
|| n == SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE /* 1040 */
|| n == SSL_R_SSLV3_ALERT_NO_CERTIFICATE /* 1041 */
|| n == SSL_R_SSLV3_ALERT_BAD_CERTIFICATE /* 1042 */
|| n == SSL_R_SSLV3_ALERT_UNSUPPORTED_CERTIFICATE /* 1043 */
|| n == SSL_R_SSLV3_ALERT_CERTIFICATE_REVOKED /* 1044 */
|| n == SSL_R_SSLV3_ALERT_CERTIFICATE_EXPIRED /* 1045 */
|| n == SSL_R_SSLV3_ALERT_CERTIFICATE_UNKNOWN /* 1046 */
|| n == SSL_R_SSLV3_ALERT_ILLEGAL_PARAMETER /* 1047 */
|| n == SSL_R_TLSV1_ALERT_UNKNOWN_CA /* 1048 */
|| n == SSL_R_TLSV1_ALERT_ACCESS_DENIED /* 1049 */
|| n == SSL_R_TLSV1_ALERT_DECODE_ERROR /* 1050 */
|| n == SSL_R_TLSV1_ALERT_DECRYPT_ERROR /* 1051 */
|| n == SSL_R_TLSV1_ALERT_EXPORT_RESTRICTION /* 1060 */
|| n == SSL_R_TLSV1_ALERT_PROTOCOL_VERSION /* 1070 */
|| n == SSL_R_TLSV1_ALERT_INSUFFICIENT_SECURITY /* 1071 */
|| n == SSL_R_TLSV1_ALERT_INTERNAL_ERROR /* 1080 */
|| n == SSL_R_TLSV1_ALERT_USER_CANCELLED /* 1090 */
|| n == SSL_R_TLSV1_ALERT_NO_RENEGOTIATION /* 1100 */
#endif
)
{
switch (c->log_error) {
case NGX_ERROR_IGNORE_ECONNRESET:
case NGX_ERROR_INFO:
level = NGX_LOG_INFO;
break;
case NGX_ERROR_ERR:
level = NGX_LOG_ERR;
break;
default:
break;
}
}
}
ngx_ssl_error(level, c->log, err, text);
}
static void
ngx_ssl_clear_error(ngx_log_t *log)
{
while (ERR_peek_error()) {
ngx_ssl_error(NGX_LOG_ALERT, log, 0, "ignoring stale global SSL error");
}
ERR_clear_error();
}
void ngx_cdecl
ngx_ssl_error(ngx_uint_t level, ngx_log_t *log, ngx_err_t err, char *fmt, ...)
{
int flags;
u_long n;
va_list args;
u_char *p, *last;
u_char errstr[NGX_MAX_CONF_ERRSTR];
const char *data;
last = errstr + NGX_MAX_CONF_ERRSTR;
va_start(args, fmt);
p = ngx_vslprintf(errstr, last - 1, fmt, args);
va_end(args);
p = ngx_cpystrn(p, (u_char *) " (SSL:", last - p);
for ( ;; ) {
n = ERR_peek_error_line_data(NULL, NULL, &data, &flags);
if (n == 0) {
break;
}
/* ERR_error_string_n() requires at least one byte */
if (p >= last - 1) {
goto next;
}
*p++ = ' ';
ERR_error_string_n(n, (char *) p, last - p);
while (p < last && *p) {
p++;
}
if (p < last && *data && (flags & ERR_TXT_STRING)) {
*p++ = ':';
p = ngx_cpystrn(p, (u_char *) data, last - p);
}
next:
(void) ERR_get_error();
}
ngx_log_error(level, log, err, "%*s)", p - errstr, errstr);
}
ngx_int_t
ngx_ssl_session_cache(ngx_ssl_t *ssl, ngx_str_t *sess_ctx,
ssize_t builtin_session_cache, ngx_shm_zone_t *shm_zone, time_t timeout)
{
long cache_mode;
SSL_CTX_set_timeout(ssl->ctx, (long) timeout);
if (ngx_ssl_session_id_context(ssl, sess_ctx) != NGX_OK) {
return NGX_ERROR;
}
if (builtin_session_cache == NGX_SSL_NO_SCACHE) {
SSL_CTX_set_session_cache_mode(ssl->ctx, SSL_SESS_CACHE_OFF);
return NGX_OK;
}
if (builtin_session_cache == NGX_SSL_NONE_SCACHE) {
/*
* If the server explicitly says that it does not support
* session reuse (see SSL_SESS_CACHE_OFF above), then
* Outlook Express fails to upload a sent email to
* the Sent Items folder on the IMAP server via a separate IMAP
* connection in the background. Therefore we have a special
* mode (SSL_SESS_CACHE_SERVER|SSL_SESS_CACHE_NO_INTERNAL_STORE)
* where the server pretends that it supports session reuse,
* but it does not actually store any session.
*/
SSL_CTX_set_session_cache_mode(ssl->ctx,
SSL_SESS_CACHE_SERVER
|SSL_SESS_CACHE_NO_AUTO_CLEAR
|SSL_SESS_CACHE_NO_INTERNAL_STORE);
SSL_CTX_sess_set_cache_size(ssl->ctx, 1);
return NGX_OK;
}
cache_mode = SSL_SESS_CACHE_SERVER;
if (shm_zone && builtin_session_cache == NGX_SSL_NO_BUILTIN_SCACHE) {
cache_mode |= SSL_SESS_CACHE_NO_INTERNAL;
}
SSL_CTX_set_session_cache_mode(ssl->ctx, cache_mode);
if (builtin_session_cache != NGX_SSL_NO_BUILTIN_SCACHE) {
if (builtin_session_cache != NGX_SSL_DFLT_BUILTIN_SCACHE) {
SSL_CTX_sess_set_cache_size(ssl->ctx, builtin_session_cache);
}
}
if (shm_zone) {
SSL_CTX_sess_set_new_cb(ssl->ctx, ngx_ssl_new_session);
SSL_CTX_sess_set_get_cb(ssl->ctx, ngx_ssl_get_cached_session);
SSL_CTX_sess_set_remove_cb(ssl->ctx, ngx_ssl_remove_session);
if (SSL_CTX_set_ex_data(ssl->ctx, ngx_ssl_session_cache_index, shm_zone)
== 0)
{
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_set_ex_data() failed");
return NGX_ERROR;
}
}
return NGX_OK;
}
static ngx_int_t
ngx_ssl_session_id_context(ngx_ssl_t *ssl, ngx_str_t *sess_ctx)
{
int n, i;
X509 *cert;
X509_NAME *name;
EVP_MD_CTX *md;
unsigned int len;
STACK_OF(X509_NAME) *list;
u_char buf[EVP_MAX_MD_SIZE];
/*
* Session ID context is set based on the string provided,
* the server certificates, and the client CA list.
*/
md = EVP_MD_CTX_create();
if (md == NULL) {
return NGX_ERROR;
}
if (EVP_DigestInit_ex(md, EVP_sha1(), NULL) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"EVP_DigestInit_ex() failed");
goto failed;
}
if (EVP_DigestUpdate(md, sess_ctx->data, sess_ctx->len) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"EVP_DigestUpdate() failed");
goto failed;
}
for (cert = SSL_CTX_get_ex_data(ssl->ctx, ngx_ssl_certificate_index);
cert;
cert = X509_get_ex_data(cert, ngx_ssl_next_certificate_index))
{
if (X509_digest(cert, EVP_sha1(), buf, &len) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"X509_digest() failed");
goto failed;
}
if (EVP_DigestUpdate(md, buf, len) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"EVP_DigestUpdate() failed");
goto failed;
}
}
list = SSL_CTX_get_client_CA_list(ssl->ctx);
if (list != NULL) {
n = sk_X509_NAME_num(list);
for (i = 0; i < n; i++) {
name = sk_X509_NAME_value(list, i);
if (X509_NAME_digest(name, EVP_sha1(), buf, &len) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"X509_NAME_digest() failed");
goto failed;
}
if (EVP_DigestUpdate(md, buf, len) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"EVP_DigestUpdate() failed");
goto failed;
}
}
}
if (EVP_DigestFinal_ex(md, buf, &len) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"EVP_DigestUpdate() failed");
goto failed;
}
EVP_MD_CTX_destroy(md);
if (SSL_CTX_set_session_id_context(ssl->ctx, buf, len) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_set_session_id_context() failed");
return NGX_ERROR;
}
return NGX_OK;
failed:
EVP_MD_CTX_destroy(md);
return NGX_ERROR;
}
ngx_int_t
ngx_ssl_session_cache_init(ngx_shm_zone_t *shm_zone, void *data)
{
size_t len;
ngx_slab_pool_t *shpool;
ngx_ssl_session_cache_t *cache;
if (data) {
shm_zone->data = data;
return NGX_OK;
}
shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
if (shm_zone->shm.exists) {
shm_zone->data = shpool->data;
return NGX_OK;
}
cache = ngx_slab_alloc(shpool, sizeof(ngx_ssl_session_cache_t));
if (cache == NULL) {
return NGX_ERROR;
}
shpool->data = cache;
shm_zone->data = cache;
ngx_rbtree_init(&cache->session_rbtree, &cache->sentinel,
ngx_ssl_session_rbtree_insert_value);
ngx_queue_init(&cache->expire_queue);
len = sizeof(" in SSL session shared cache \"\"") + shm_zone->shm.name.len;
shpool->log_ctx = ngx_slab_alloc(shpool, len);
if (shpool->log_ctx == NULL) {
return NGX_ERROR;
}
ngx_sprintf(shpool->log_ctx, " in SSL session shared cache \"%V\"%Z",
&shm_zone->shm.name);
shpool->log_nomem = 0;
return NGX_OK;
}
/*
* The length of the session id is 16 bytes for SSLv2 sessions and
* between 1 and 32 bytes for SSLv3/TLSv1, typically 32 bytes.
* It seems that the typical length of the external ASN1 representation
* of a session is 118 or 119 bytes for SSLv3/TSLv1.
*
* Thus on 32-bit platforms we allocate separately an rbtree node,
* a session id, and an ASN1 representation, they take accordingly
* 64, 32, and 128 bytes.
*
* On 64-bit platforms we allocate separately an rbtree node + session_id,
* and an ASN1 representation, they take accordingly 128 and 128 bytes.
*
* OpenSSL's i2d_SSL_SESSION() and d2i_SSL_SESSION are slow,
* so they are outside the code locked by shared pool mutex
*/
static int
ngx_ssl_new_session(ngx_ssl_conn_t *ssl_conn, ngx_ssl_session_t *sess)
{
int len;
u_char *p, *id, *cached_sess, *session_id;
uint32_t hash;
SSL_CTX *ssl_ctx;
unsigned int session_id_length;
ngx_shm_zone_t *shm_zone;
ngx_connection_t *c;
ngx_slab_pool_t *shpool;
ngx_ssl_sess_id_t *sess_id;
ngx_ssl_session_cache_t *cache;
u_char buf[NGX_SSL_MAX_SESSION_SIZE];
len = i2d_SSL_SESSION(sess, NULL);
/* do not cache too big session */
if (len > (int) NGX_SSL_MAX_SESSION_SIZE) {
return 0;
}
p = buf;
i2d_SSL_SESSION(sess, &p);
c = ngx_ssl_get_connection(ssl_conn);
ssl_ctx = c->ssl->session_ctx;
shm_zone = SSL_CTX_get_ex_data(ssl_ctx, ngx_ssl_session_cache_index);
cache = shm_zone->data;
shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
ngx_shmtx_lock(&shpool->mutex);
/* drop one or two expired sessions */
ngx_ssl_expire_sessions(cache, shpool, 1);
cached_sess = ngx_slab_alloc_locked(shpool, len);
if (cached_sess == NULL) {
/* drop the oldest non-expired session and try once more */
ngx_ssl_expire_sessions(cache, shpool, 0);
cached_sess = ngx_slab_alloc_locked(shpool, len);
if (cached_sess == NULL) {
sess_id = NULL;
goto failed;
}
}
sess_id = ngx_slab_alloc_locked(shpool, sizeof(ngx_ssl_sess_id_t));
if (sess_id == NULL) {
/* drop the oldest non-expired session and try once more */
ngx_ssl_expire_sessions(cache, shpool, 0);
sess_id = ngx_slab_alloc_locked(shpool, sizeof(ngx_ssl_sess_id_t));
if (sess_id == NULL) {
goto failed;
}
}
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
session_id = (u_char *) SSL_SESSION_get_id(sess, &session_id_length);
#else
session_id = sess->session_id;
session_id_length = sess->session_id_length;
#endif
#if (NGX_PTR_SIZE == 8)
id = sess_id->sess_id;
#else
id = ngx_slab_alloc_locked(shpool, session_id_length);
if (id == NULL) {
/* drop the oldest non-expired session and try once more */
ngx_ssl_expire_sessions(cache, shpool, 0);
id = ngx_slab_alloc_locked(shpool, session_id_length);
if (id == NULL) {
goto failed;
}
}
#endif
ngx_memcpy(cached_sess, buf, len);
ngx_memcpy(id, session_id, session_id_length);
hash = ngx_crc32_short(session_id, session_id_length);
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"ssl new session: %08XD:%ud:%d",
hash, session_id_length, len);
sess_id->node.key = hash;
sess_id->node.data = (u_char) session_id_length;
sess_id->id = id;
sess_id->len = len;
sess_id->session = cached_sess;
sess_id->expire = ngx_time() + SSL_CTX_get_timeout(ssl_ctx);
ngx_queue_insert_head(&cache->expire_queue, &sess_id->queue);
ngx_rbtree_insert(&cache->session_rbtree, &sess_id->node);
ngx_shmtx_unlock(&shpool->mutex);
return 0;
failed:
if (cached_sess) {
ngx_slab_free_locked(shpool, cached_sess);
}
if (sess_id) {
ngx_slab_free_locked(shpool, sess_id);
}
ngx_shmtx_unlock(&shpool->mutex);
ngx_log_error(NGX_LOG_ALERT, c->log, 0,
"could not allocate new session%s", shpool->log_ctx);
return 0;
}
static ngx_ssl_session_t *
ngx_ssl_get_cached_session(ngx_ssl_conn_t *ssl_conn,
#if OPENSSL_VERSION_NUMBER >= 0x10100003L
const
#endif
u_char *id, int len, int *copy)
{
#if OPENSSL_VERSION_NUMBER >= 0x0090707fL
const
#endif
u_char *p;
uint32_t hash;
ngx_int_t rc;
ngx_shm_zone_t *shm_zone;
ngx_slab_pool_t *shpool;
ngx_rbtree_node_t *node, *sentinel;
ngx_ssl_session_t *sess;
ngx_ssl_sess_id_t *sess_id;
ngx_ssl_session_cache_t *cache;
u_char buf[NGX_SSL_MAX_SESSION_SIZE];
ngx_connection_t *c;
hash = ngx_crc32_short((u_char *) (uintptr_t) id, (size_t) len);
*copy = 0;
c = ngx_ssl_get_connection(ssl_conn);
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
"ssl get session: %08XD:%d", hash, len);
shm_zone = SSL_CTX_get_ex_data(c->ssl->session_ctx,
ngx_ssl_session_cache_index);
cache = shm_zone->data;
sess = NULL;
shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
ngx_shmtx_lock(&shpool->mutex);
node = cache->session_rbtree.root;
sentinel = cache->session_rbtree.sentinel;
while (node != sentinel) {
if (hash < node->key) {
node = node->left;
continue;
}
if (hash > node->key) {
node = node->right;
continue;
}
/* hash == node->key */
sess_id = (ngx_ssl_sess_id_t *) node;
rc = ngx_memn2cmp((u_char *) (uintptr_t) id, sess_id->id,
(size_t) len, (size_t) node->data);
if (rc == 0) {
if (sess_id->expire > ngx_time()) {
ngx_memcpy(buf, sess_id->session, sess_id->len);
ngx_shmtx_unlock(&shpool->mutex);
p = buf;
sess = d2i_SSL_SESSION(NULL, &p, sess_id->len);
return sess;
}
ngx_queue_remove(&sess_id->queue);
ngx_rbtree_delete(&cache->session_rbtree, node);
ngx_slab_free_locked(shpool, sess_id->session);
#if (NGX_PTR_SIZE == 4)
ngx_slab_free_locked(shpool, sess_id->id);
#endif
ngx_slab_free_locked(shpool, sess_id);
sess = NULL;
goto done;
}
node = (rc < 0) ? node->left : node->right;
}
done:
ngx_shmtx_unlock(&shpool->mutex);
return sess;
}
void
ngx_ssl_remove_cached_session(SSL_CTX *ssl, ngx_ssl_session_t *sess)
{
SSL_CTX_remove_session(ssl, sess);
ngx_ssl_remove_session(ssl, sess);
}
static void
ngx_ssl_remove_session(SSL_CTX *ssl, ngx_ssl_session_t *sess)
{
u_char *id;
uint32_t hash;
ngx_int_t rc;
unsigned int len;
ngx_shm_zone_t *shm_zone;
ngx_slab_pool_t *shpool;
ngx_rbtree_node_t *node, *sentinel;
ngx_ssl_sess_id_t *sess_id;
ngx_ssl_session_cache_t *cache;
shm_zone = SSL_CTX_get_ex_data(ssl, ngx_ssl_session_cache_index);
if (shm_zone == NULL) {
return;
}
cache = shm_zone->data;
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
id = (u_char *) SSL_SESSION_get_id(sess, &len);
#else
id = sess->session_id;
len = sess->session_id_length;
#endif
hash = ngx_crc32_short(id, len);
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0,
"ssl remove session: %08XD:%ud", hash, len);
shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
ngx_shmtx_lock(&shpool->mutex);
node = cache->session_rbtree.root;
sentinel = cache->session_rbtree.sentinel;
while (node != sentinel) {
if (hash < node->key) {
node = node->left;
continue;
}
if (hash > node->key) {
node = node->right;
continue;
}
/* hash == node->key */
sess_id = (ngx_ssl_sess_id_t *) node;
rc = ngx_memn2cmp(id, sess_id->id, len, (size_t) node->data);
if (rc == 0) {
ngx_queue_remove(&sess_id->queue);
ngx_rbtree_delete(&cache->session_rbtree, node);
ngx_slab_free_locked(shpool, sess_id->session);
#if (NGX_PTR_SIZE == 4)
ngx_slab_free_locked(shpool, sess_id->id);
#endif
ngx_slab_free_locked(shpool, sess_id);
goto done;
}
node = (rc < 0) ? node->left : node->right;
}
done:
ngx_shmtx_unlock(&shpool->mutex);
}
static void
ngx_ssl_expire_sessions(ngx_ssl_session_cache_t *cache,
ngx_slab_pool_t *shpool, ngx_uint_t n)
{
time_t now;
ngx_queue_t *q;
ngx_ssl_sess_id_t *sess_id;
now = ngx_time();
while (n < 3) {
if (ngx_queue_empty(&cache->expire_queue)) {
return;
}
q = ngx_queue_last(&cache->expire_queue);
sess_id = ngx_queue_data(q, ngx_ssl_sess_id_t, queue);
if (n++ != 0 && sess_id->expire > now) {
return;
}
ngx_queue_remove(q);
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0,
"expire session: %08Xi", sess_id->node.key);
ngx_rbtree_delete(&cache->session_rbtree, &sess_id->node);
ngx_slab_free_locked(shpool, sess_id->session);
#if (NGX_PTR_SIZE == 4)
ngx_slab_free_locked(shpool, sess_id->id);
#endif
ngx_slab_free_locked(shpool, sess_id);
}
}
static void
ngx_ssl_session_rbtree_insert_value(ngx_rbtree_node_t *temp,
ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
{
ngx_rbtree_node_t **p;
ngx_ssl_sess_id_t *sess_id, *sess_id_temp;
for ( ;; ) {
if (node->key < temp->key) {
p = &temp->left;
} else if (node->key > temp->key) {
p = &temp->right;
} else { /* node->key == temp->key */
sess_id = (ngx_ssl_sess_id_t *) node;
sess_id_temp = (ngx_ssl_sess_id_t *) temp;
p = (ngx_memn2cmp(sess_id->id, sess_id_temp->id,
(size_t) node->data, (size_t) temp->data)
< 0) ? &temp->left : &temp->right;
}
if (*p == sentinel) {
break;
}
temp = *p;
}
*p = node;
node->parent = temp;
node->left = sentinel;
node->right = sentinel;
ngx_rbt_red(node);
}
#ifdef SSL_CTRL_SET_TLSEXT_TICKET_KEY_CB
ngx_int_t
ngx_ssl_session_ticket_keys(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_array_t *paths)
{
u_char buf[80];
size_t size;
ssize_t n;
ngx_str_t *path;
ngx_file_t file;
ngx_uint_t i;
ngx_array_t *keys;
ngx_file_info_t fi;
ngx_ssl_session_ticket_key_t *key;
if (paths == NULL) {
return NGX_OK;
}
keys = ngx_array_create(cf->pool, paths->nelts,
sizeof(ngx_ssl_session_ticket_key_t));
if (keys == NULL) {
return NGX_ERROR;
}
path = paths->elts;
for (i = 0; i < paths->nelts; i++) {
if (ngx_conf_full_name(cf->cycle, &path[i], 1) != NGX_OK) {
return NGX_ERROR;
}
ngx_memzero(&file, sizeof(ngx_file_t));
file.name = path[i];
file.log = cf->log;
file.fd = ngx_open_file(file.name.data, NGX_FILE_RDONLY, 0, 0);
if (file.fd == NGX_INVALID_FILE) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
ngx_open_file_n " \"%V\" failed", &file.name);
return NGX_ERROR;
}
if (ngx_fd_info(file.fd, &fi) == NGX_FILE_ERROR) {
ngx_conf_log_error(NGX_LOG_CRIT, cf, ngx_errno,
ngx_fd_info_n " \"%V\" failed", &file.name);
goto failed;
}
size = ngx_file_size(&fi);
if (size != 48 && size != 80) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"%V\" must be 48 or 80 bytes", &file.name);
goto failed;
}
n = ngx_read_file(&file, buf, size, 0);
if (n == NGX_ERROR) {
ngx_conf_log_error(NGX_LOG_CRIT, cf, ngx_errno,
ngx_read_file_n " \"%V\" failed", &file.name);
goto failed;
}
if ((size_t) n != size) {
ngx_conf_log_error(NGX_LOG_CRIT, cf, 0,
ngx_read_file_n " \"%V\" returned only "
"%z bytes instead of %uz", &file.name, n, size);
goto failed;
}
key = ngx_array_push(keys);
if (key == NULL) {
goto failed;
}
if (size == 48) {
key->size = 48;
ngx_memcpy(key->name, buf, 16);
ngx_memcpy(key->aes_key, buf + 16, 16);
ngx_memcpy(key->hmac_key, buf + 32, 16);
} else {
key->size = 80;
ngx_memcpy(key->name, buf, 16);
ngx_memcpy(key->hmac_key, buf + 16, 32);
ngx_memcpy(key->aes_key, buf + 48, 32);
}
if (ngx_close_file(file.fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " \"%V\" failed", &file.name);
}
}
if (SSL_CTX_set_ex_data(ssl->ctx, ngx_ssl_session_ticket_keys_index, keys)
== 0)
{
ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
"SSL_CTX_set_ex_data() failed");
return NGX_ERROR;
}
if (SSL_CTX_set_tlsext_ticket_key_cb(ssl->ctx,
ngx_ssl_session_ticket_key_callback)
== 0)
{
ngx_log_error(NGX_LOG_WARN, cf->log, 0,
"nginx was built with Session Tickets support, however, "
"now it is linked dynamically to an OpenSSL library "
"which has no tlsext support, therefore Session Tickets "
"are not available");
}
return NGX_OK;
failed:
if (ngx_close_file(file.fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " \"%V\" failed", &file.name);
}
return NGX_ERROR;
}
static int
ngx_ssl_session_ticket_key_callback(ngx_ssl_conn_t *ssl_conn,
unsigned char *name, unsigned char *iv, EVP_CIPHER_CTX *ectx,
HMAC_CTX *hctx, int enc)
{
size_t size;
SSL_CTX *ssl_ctx;
ngx_uint_t i;
ngx_array_t *keys;
ngx_connection_t *c;
ngx_ssl_session_ticket_key_t *key;
const EVP_MD *digest;
const EVP_CIPHER *cipher;
#if (NGX_DEBUG)
u_char buf[32];
#endif
c = ngx_ssl_get_connection(ssl_conn);
ssl_ctx = c->ssl->session_ctx;
#ifdef OPENSSL_NO_SHA256
digest = EVP_sha1();
#else
digest = EVP_sha256();
#endif
keys = SSL_CTX_get_ex_data(ssl_ctx, ngx_ssl_session_ticket_keys_index);
if (keys == NULL) {
return -1;
}
key = keys->elts;
if (enc == 1) {
/* encrypt session ticket */
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"ssl session ticket encrypt, key: \"%*s\" (%s session)",
ngx_hex_dump(buf, key[0].name, 16) - buf, buf,
SSL_session_reused(ssl_conn) ? "reused" : "new");
if (key[0].size == 48) {
cipher = EVP_aes_128_cbc();
size = 16;
} else {
cipher = EVP_aes_256_cbc();
size = 32;
}
if (RAND_bytes(iv, EVP_CIPHER_iv_length(cipher)) != 1) {
ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "RAND_bytes() failed");
return -1;
}
if (EVP_EncryptInit_ex(ectx, cipher, NULL, key[0].aes_key, iv) != 1) {
ngx_ssl_error(NGX_LOG_ALERT, c->log, 0,
"EVP_EncryptInit_ex() failed");
return -1;
}
#if OPENSSL_VERSION_NUMBER >= 0x10000000L
if (HMAC_Init_ex(hctx, key[0].hmac_key, size, digest, NULL) != 1) {
ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "HMAC_Init_ex() failed");
return -1;
}
#else
HMAC_Init_ex(hctx, key[0].hmac_key, size, digest, NULL);
#endif
ngx_memcpy(name, key[0].name, 16);
return 1;
} else {
/* decrypt session ticket */
for (i = 0; i < keys->nelts; i++) {
if (ngx_memcmp(name, key[i].name, 16) == 0) {
goto found;
}
}
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
"ssl session ticket decrypt, key: \"%*s\" not found",
ngx_hex_dump(buf, name, 16) - buf, buf);
return 0;
found:
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"ssl session ticket decrypt, key: \"%*s\"%s",
ngx_hex_dump(buf, key[i].name, 16) - buf, buf,
(i == 0) ? " (default)" : "");
if (key[i].size == 48) {
cipher = EVP_aes_128_cbc();
size = 16;
} else {
cipher = EVP_aes_256_cbc();
size = 32;
}
#if OPENSSL_VERSION_NUMBER >= 0x10000000L
if (HMAC_Init_ex(hctx, key[i].hmac_key, size, digest, NULL) != 1) {
ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "HMAC_Init_ex() failed");
return -1;
}
#else
HMAC_Init_ex(hctx, key[i].hmac_key, size, digest, NULL);
#endif
if (EVP_DecryptInit_ex(ectx, cipher, NULL, key[i].aes_key, iv) != 1) {
ngx_ssl_error(NGX_LOG_ALERT, c->log, 0,
"EVP_DecryptInit_ex() failed");
return -1;
}
return (i == 0) ? 1 : 2 /* renew */;
}
}
#else
ngx_int_t
ngx_ssl_session_ticket_keys(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_array_t *paths)
{
if (paths) {
ngx_log_error(NGX_LOG_WARN, ssl->log, 0,
"\"ssl_session_ticket_keys\" ignored, not supported");
}
return NGX_OK;
}
#endif
void
ngx_ssl_cleanup_ctx(void *data)
{
ngx_ssl_t *ssl = data;
X509 *cert, *next;
cert = SSL_CTX_get_ex_data(ssl->ctx, ngx_ssl_certificate_index);
while (cert) {
next = X509_get_ex_data(cert, ngx_ssl_next_certificate_index);
X509_free(cert);
cert = next;
}
SSL_CTX_free(ssl->ctx);
}
ngx_int_t
ngx_ssl_check_host(ngx_connection_t *c, ngx_str_t *name)
{
X509 *cert;
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
return NGX_ERROR;
}
#ifdef X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT
/* X509_check_host() is only available in OpenSSL 1.0.2+ */
if (name->len == 0) {
goto failed;
}
if (X509_check_host(cert, (char *) name->data, name->len, 0, NULL) != 1) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
"X509_check_host(): no match");
goto failed;
}
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
"X509_check_host(): match");
goto found;
#else
{
int n, i;
X509_NAME *sname;
ASN1_STRING *str;
X509_NAME_ENTRY *entry;
GENERAL_NAME *altname;
STACK_OF(GENERAL_NAME) *altnames;
/*
* As per RFC6125 and RFC2818, we check subjectAltName extension,
* and if it's not present - commonName in Subject is checked.
*/
altnames = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
if (altnames) {
n = sk_GENERAL_NAME_num(altnames);
for (i = 0; i < n; i++) {
altname = sk_GENERAL_NAME_value(altnames, i);
if (altname->type != GEN_DNS) {
continue;
}
str = altname->d.dNSName;
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
"SSL subjectAltName: \"%*s\"",
ASN1_STRING_length(str), ASN1_STRING_data(str));
if (ngx_ssl_check_name(name, str) == NGX_OK) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
"SSL subjectAltName: match");
GENERAL_NAMES_free(altnames);
goto found;
}
}
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
"SSL subjectAltName: no match");
GENERAL_NAMES_free(altnames);
goto failed;
}
/*
* If there is no subjectAltName extension, check commonName
* in Subject. While RFC2818 requires to only check "most specific"
* CN, both Apache and OpenSSL check all CNs, and so do we.
*/
sname = X509_get_subject_name(cert);
if (sname == NULL) {
goto failed;
}
i = -1;
for ( ;; ) {
i = X509_NAME_get_index_by_NID(sname, NID_commonName, i);
if (i < 0) {
break;
}
entry = X509_NAME_get_entry(sname, i);
str = X509_NAME_ENTRY_get_data(entry);
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
"SSL commonName: \"%*s\"",
ASN1_STRING_length(str), ASN1_STRING_data(str));
if (ngx_ssl_check_name(name, str) == NGX_OK) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
"SSL commonName: match");
goto found;
}
}
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
"SSL commonName: no match");
}
#endif
failed:
X509_free(cert);
return NGX_ERROR;
found:
X509_free(cert);
return NGX_OK;
}
#ifndef X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT
static ngx_int_t
ngx_ssl_check_name(ngx_str_t *name, ASN1_STRING *pattern)
{
u_char *s, *p, *end;
size_t slen, plen;
s = name->data;
slen = name->len;
p = ASN1_STRING_data(pattern);
plen = ASN1_STRING_length(pattern);
if (slen == plen && ngx_strncasecmp(s, p, plen) == 0) {
return NGX_OK;
}
if (plen > 2 && p[0] == '*' && p[1] == '.') {
plen -= 1;
p += 1;
end = s + slen;
s = ngx_strlchr(s, end, '.');
if (s == NULL) {
return NGX_ERROR;
}
slen = end - s;
if (plen == slen && ngx_strncasecmp(s, p, plen) == 0) {
return NGX_OK;
}
}
return NGX_ERROR;
}
#endif
ngx_int_t
ngx_ssl_get_protocol(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
s->data = (u_char *) SSL_get_version(c->ssl->connection);
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_cipher_name(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
s->data = (u_char *) SSL_get_cipher_name(c->ssl->connection);
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_ciphers(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
#ifdef SSL_CTRL_GET_RAW_CIPHERLIST
int n, i, bytes;
size_t len;
u_char *ciphers, *p;
const SSL_CIPHER *cipher;
bytes = SSL_get0_raw_cipherlist(c->ssl->connection, NULL);
n = SSL_get0_raw_cipherlist(c->ssl->connection, &ciphers);
if (n <= 0) {
s->len = 0;
return NGX_OK;
}
len = 0;
n /= bytes;
for (i = 0; i < n; i++) {
cipher = SSL_CIPHER_find(c->ssl->connection, ciphers + i * bytes);
if (cipher) {
len += ngx_strlen(SSL_CIPHER_get_name(cipher));
} else {
len += sizeof("0x") - 1 + bytes * (sizeof("00") - 1);
}
len += sizeof(":") - 1;
}
s->data = ngx_pnalloc(pool, len);
if (s->data == NULL) {
return NGX_ERROR;
}
p = s->data;
for (i = 0; i < n; i++) {
cipher = SSL_CIPHER_find(c->ssl->connection, ciphers + i * bytes);
if (cipher) {
p = ngx_sprintf(p, "%s", SSL_CIPHER_get_name(cipher));
} else {
p = ngx_sprintf(p, "0x");
p = ngx_hex_dump(p, ciphers + i * bytes, bytes);
}
*p++ = ':';
}
p--;
s->len = p - s->data;
#else
u_char buf[4096];
if (SSL_get_shared_ciphers(c->ssl->connection, (char *) buf, 4096)
== NULL)
{
s->len = 0;
return NGX_OK;
}
s->len = ngx_strlen(buf);
s->data = ngx_pnalloc(pool, s->len);
if (s->data == NULL) {
return NGX_ERROR;
}
ngx_memcpy(s->data, buf, s->len);
#endif
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_curves(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
#ifdef SSL_CTRL_GET_CURVES
int *curves, n, i, nid;
u_char *p;
size_t len;
n = SSL_get1_curves(c->ssl->connection, NULL);
if (n <= 0) {
s->len = 0;
return NGX_OK;
}
curves = ngx_palloc(pool, n * sizeof(int));
n = SSL_get1_curves(c->ssl->connection, curves);
len = 0;
for (i = 0; i < n; i++) {
nid = curves[i];
if (nid & TLSEXT_nid_unknown) {
len += sizeof("0x0000") - 1;
} else {
len += ngx_strlen(OBJ_nid2sn(nid));
}
len += sizeof(":") - 1;
}
s->data = ngx_pnalloc(pool, len);
if (s->data == NULL) {
return NGX_ERROR;
}
p = s->data;
for (i = 0; i < n; i++) {
nid = curves[i];
if (nid & TLSEXT_nid_unknown) {
p = ngx_sprintf(p, "0x%04xd", nid & 0xffff);
} else {
p = ngx_sprintf(p, "%s", OBJ_nid2sn(nid));
}
*p++ = ':';
}
p--;
s->len = p - s->data;
#else
s->len = 0;
#endif
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_session_id(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
u_char *buf;
SSL_SESSION *sess;
unsigned int len;
sess = SSL_get0_session(c->ssl->connection);
if (sess == NULL) {
s->len = 0;
return NGX_OK;
}
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
buf = (u_char *) SSL_SESSION_get_id(sess, &len);
#else
buf = sess->session_id;
len = sess->session_id_length;
#endif
s->len = 2 * len;
s->data = ngx_pnalloc(pool, 2 * len);
if (s->data == NULL) {
return NGX_ERROR;
}
ngx_hex_dump(s->data, buf, len);
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_session_reused(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
if (SSL_session_reused(c->ssl->connection)) {
ngx_str_set(s, "r");
} else {
ngx_str_set(s, ".");
}
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_server_name(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
const char *servername;
servername = SSL_get_servername(c->ssl->connection,
TLSEXT_NAMETYPE_host_name);
if (servername) {
s->data = (u_char *) servername;
s->len = ngx_strlen(servername);
return NGX_OK;
}
#endif
s->len = 0;
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_raw_certificate(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
size_t len;
BIO *bio;
X509 *cert;
s->len = 0;
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
return NGX_OK;
}
bio = BIO_new(BIO_s_mem());
if (bio == NULL) {
ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "BIO_new() failed");
X509_free(cert);
return NGX_ERROR;
}
if (PEM_write_bio_X509(bio, cert) == 0) {
ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "PEM_write_bio_X509() failed");
goto failed;
}
len = BIO_pending(bio);
s->len = len;
s->data = ngx_pnalloc(pool, len);
if (s->data == NULL) {
goto failed;
}
BIO_read(bio, s->data, len);
BIO_free(bio);
X509_free(cert);
return NGX_OK;
failed:
BIO_free(bio);
X509_free(cert);
return NGX_ERROR;
}
ngx_int_t
ngx_ssl_get_certificate(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
u_char *p;
size_t len;
ngx_uint_t i;
ngx_str_t cert;
if (ngx_ssl_get_raw_certificate(c, pool, &cert) != NGX_OK) {
return NGX_ERROR;
}
if (cert.len == 0) {
s->len = 0;
return NGX_OK;
}
len = cert.len - 1;
for (i = 0; i < cert.len - 1; i++) {
if (cert.data[i] == LF) {
len++;
}
}
s->len = len;
s->data = ngx_pnalloc(pool, len);
if (s->data == NULL) {
return NGX_ERROR;
}
p = s->data;
for (i = 0; i < cert.len - 1; i++) {
*p++ = cert.data[i];
if (cert.data[i] == LF) {
*p++ = '\t';
}
}
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_subject_dn(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
BIO *bio;
X509 *cert;
X509_NAME *name;
s->len = 0;
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
return NGX_OK;
}
name = X509_get_subject_name(cert);
if (name == NULL) {
return NGX_ERROR;
}
bio = BIO_new(BIO_s_mem());
if (bio == NULL) {
X509_free(cert);
return NGX_ERROR;
}
if (X509_NAME_print_ex(bio, name, 0, XN_FLAG_RFC2253) < 0) {
goto failed;
}
s->len = BIO_pending(bio);
s->data = ngx_pnalloc(pool, s->len);
if (s->data == NULL) {
goto failed;
}
BIO_read(bio, s->data, s->len);
BIO_free(bio);
X509_free(cert);
return NGX_OK;
failed:
BIO_free(bio);
X509_free(cert);
return NGX_ERROR;
}
ngx_int_t
ngx_ssl_get_issuer_dn(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
BIO *bio;
X509 *cert;
X509_NAME *name;
s->len = 0;
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
return NGX_OK;
}
name = X509_get_issuer_name(cert);
if (name == NULL) {
return NGX_ERROR;
}
bio = BIO_new(BIO_s_mem());
if (bio == NULL) {
X509_free(cert);
return NGX_ERROR;
}
if (X509_NAME_print_ex(bio, name, 0, XN_FLAG_RFC2253) < 0) {
goto failed;
}
s->len = BIO_pending(bio);
s->data = ngx_pnalloc(pool, s->len);
if (s->data == NULL) {
goto failed;
}
BIO_read(bio, s->data, s->len);
BIO_free(bio);
X509_free(cert);
return NGX_OK;
failed:
BIO_free(bio);
X509_free(cert);
return NGX_ERROR;
}
ngx_int_t
ngx_ssl_get_subject_dn_legacy(ngx_connection_t *c, ngx_pool_t *pool,
ngx_str_t *s)
{
char *p;
size_t len;
X509 *cert;
X509_NAME *name;
s->len = 0;
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
return NGX_OK;
}
name = X509_get_subject_name(cert);
if (name == NULL) {
X509_free(cert);
return NGX_ERROR;
}
p = X509_NAME_oneline(name, NULL, 0);
for (len = 0; p[len]; len++) { /* void */ }
s->len = len;
s->data = ngx_pnalloc(pool, len);
if (s->data == NULL) {
OPENSSL_free(p);
X509_free(cert);
return NGX_ERROR;
}
ngx_memcpy(s->data, p, len);
OPENSSL_free(p);
X509_free(cert);
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_issuer_dn_legacy(ngx_connection_t *c, ngx_pool_t *pool,
ngx_str_t *s)
{
char *p;
size_t len;
X509 *cert;
X509_NAME *name;
s->len = 0;
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
return NGX_OK;
}
name = X509_get_issuer_name(cert);
if (name == NULL) {
X509_free(cert);
return NGX_ERROR;
}
p = X509_NAME_oneline(name, NULL, 0);
for (len = 0; p[len]; len++) { /* void */ }
s->len = len;
s->data = ngx_pnalloc(pool, len);
if (s->data == NULL) {
OPENSSL_free(p);
X509_free(cert);
return NGX_ERROR;
}
ngx_memcpy(s->data, p, len);
OPENSSL_free(p);
X509_free(cert);
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_serial_number(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
size_t len;
X509 *cert;
BIO *bio;
s->len = 0;
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
return NGX_OK;
}
bio = BIO_new(BIO_s_mem());
if (bio == NULL) {
X509_free(cert);
return NGX_ERROR;
}
i2a_ASN1_INTEGER(bio, X509_get_serialNumber(cert));
len = BIO_pending(bio);
s->len = len;
s->data = ngx_pnalloc(pool, len);
if (s->data == NULL) {
BIO_free(bio);
X509_free(cert);
return NGX_ERROR;
}
BIO_read(bio, s->data, len);
BIO_free(bio);
X509_free(cert);
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_fingerprint(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
X509 *cert;
unsigned int len;
u_char buf[EVP_MAX_MD_SIZE];
s->len = 0;
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
return NGX_OK;
}
if (!X509_digest(cert, EVP_sha1(), buf, &len)) {
X509_free(cert);
return NGX_ERROR;
}
s->len = 2 * len;
s->data = ngx_pnalloc(pool, 2 * len);
if (s->data == NULL) {
X509_free(cert);
return NGX_ERROR;
}
ngx_hex_dump(s->data, buf, len);
X509_free(cert);
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_client_verify(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
X509 *cert;
long rc;
const char *str;
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
ngx_str_set(s, "NONE");
return NGX_OK;
}
X509_free(cert);
rc = SSL_get_verify_result(c->ssl->connection);
if (rc == X509_V_OK) {
ngx_str_set(s, "SUCCESS");
return NGX_OK;
}
str = X509_verify_cert_error_string(rc);
s->data = ngx_pnalloc(pool, sizeof("FAILED:") - 1 + ngx_strlen(str));
if (s->data == NULL) {
return NGX_ERROR;
}
s->len = ngx_sprintf(s->data, "FAILED:%s", str) - s->data;
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_client_v_start(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
BIO *bio;
X509 *cert;
size_t len;
s->len = 0;
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
return NGX_OK;
}
bio = BIO_new(BIO_s_mem());
if (bio == NULL) {
X509_free(cert);
return NGX_ERROR;
}
#if OPENSSL_VERSION_NUMBER > 0x10100000L
ASN1_TIME_print(bio, X509_get0_notBefore(cert));
#else
ASN1_TIME_print(bio, X509_get_notBefore(cert));
#endif
len = BIO_pending(bio);
s->len = len;
s->data = ngx_pnalloc(pool, len);
if (s->data == NULL) {
BIO_free(bio);
X509_free(cert);
return NGX_ERROR;
}
BIO_read(bio, s->data, len);
BIO_free(bio);
X509_free(cert);
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_client_v_end(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
BIO *bio;
X509 *cert;
size_t len;
s->len = 0;
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
return NGX_OK;
}
bio = BIO_new(BIO_s_mem());
if (bio == NULL) {
X509_free(cert);
return NGX_ERROR;
}
#if OPENSSL_VERSION_NUMBER > 0x10100000L
ASN1_TIME_print(bio, X509_get0_notAfter(cert));
#else
ASN1_TIME_print(bio, X509_get_notAfter(cert));
#endif
len = BIO_pending(bio);
s->len = len;
s->data = ngx_pnalloc(pool, len);
if (s->data == NULL) {
BIO_free(bio);
X509_free(cert);
return NGX_ERROR;
}
BIO_read(bio, s->data, len);
BIO_free(bio);
X509_free(cert);
return NGX_OK;
}
ngx_int_t
ngx_ssl_get_client_v_remain(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
X509 *cert;
time_t now, end;
s->len = 0;
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
return NGX_OK;
}
#if OPENSSL_VERSION_NUMBER > 0x10100000L
end = ngx_ssl_parse_time(X509_get0_notAfter(cert));
#else
end = ngx_ssl_parse_time(X509_get_notAfter(cert));
#endif
if (end == (time_t) NGX_ERROR) {
X509_free(cert);
return NGX_OK;
}
now = ngx_time();
if (end < now + 86400) {
ngx_str_set(s, "0");
X509_free(cert);
return NGX_OK;
}
s->data = ngx_pnalloc(pool, NGX_TIME_T_LEN);
if (s->data == NULL) {
X509_free(cert);
return NGX_ERROR;
}
s->len = ngx_sprintf(s->data, "%T", (end - now) / 86400) - s->data;
X509_free(cert);
return NGX_OK;
}
static time_t
ngx_ssl_parse_time(
#if OPENSSL_VERSION_NUMBER > 0x10100000L
const
#endif
ASN1_TIME *asn1time)
{
BIO *bio;
char *value;
size_t len;
time_t time;
/*
* OpenSSL doesn't provide a way to convert ASN1_TIME
* into time_t. To do this, we use ASN1_TIME_print(),
* which uses the "MMM DD HH:MM:SS YYYY [GMT]" format (e.g.,
* "Feb 3 00:55:52 2015 GMT"), and parse the result.
*/
bio = BIO_new(BIO_s_mem());
if (bio == NULL) {
return NGX_ERROR;
}
/* fake weekday prepended to match C asctime() format */
BIO_write(bio, "Tue ", sizeof("Tue ") - 1);
ASN1_TIME_print(bio, asn1time);
len = BIO_get_mem_data(bio, &value);
time = ngx_parse_http_time((u_char *) value, len);
BIO_free(bio);
return time;
}
static void *
ngx_openssl_create_conf(ngx_cycle_t *cycle)
{
ngx_openssl_conf_t *oscf;
oscf = ngx_pcalloc(cycle->pool, sizeof(ngx_openssl_conf_t));
if (oscf == NULL) {
return NULL;
}
/*
* set by ngx_pcalloc():
*
* oscf->engine = 0;
*/
return oscf;
}
static char *
ngx_openssl_engine(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
#ifndef OPENSSL_NO_ENGINE
ngx_openssl_conf_t *oscf = conf;
ENGINE *engine;
ngx_str_t *value;
if (oscf->engine) {
return "is duplicate";
}
oscf->engine = 1;
value = cf->args->elts;
engine = ENGINE_by_id((char *) value[1].data);
if (engine == NULL) {
ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
"ENGINE_by_id(\"%V\") failed", &value[1]);
return NGX_CONF_ERROR;
}
if (ENGINE_set_default(engine, ENGINE_METHOD_ALL) == 0) {
ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
"ENGINE_set_default(\"%V\", ENGINE_METHOD_ALL) failed",
&value[1]);
ENGINE_free(engine);
return NGX_CONF_ERROR;
}
ENGINE_free(engine);
return NGX_CONF_OK;
#else
return "is not supported";
#endif
}
static void
ngx_openssl_exit(ngx_cycle_t *cycle)
{
#if OPENSSL_VERSION_NUMBER < 0x10100003L
EVP_cleanup();
#ifndef OPENSSL_NO_ENGINE
ENGINE_cleanup();
#endif
#endif
}