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36be79301e
nginx/src/event/ngx_event_openssl.c
Sergey Kandaurov 36be79301e SSL: disabled renegotiation detection in client mode. 
CVE-2009-3555 is no longer relevant and mitigated by the renegotiation
info extension (secure renegotiation).  On the other hand, unexpected
renegotiation still introduces potential security risks, and hence we do
not allow renegotiation on the server side, as we never request renegotiation.

On the client side the situation is different though.  There are backends
which explicitly request renegotiation, and disabled renegotiation
introduces interoperability problems.  This change allows renegotiation
on the client side, and fixes interoperability problems as observed with
such backends (ticket #872).

Additionally, with TLSv1.3 the SSL_CB_HANDSHAKE_START flag is currently set
by OpenSSL when receiving a NewSessionTicket message, and was detected by
nginx as a renegotiation attempt.  This looks like a bug in OpenSSL, though
this change also allows better interoperability till the problem is fixed.
2017-04-18 16:08:44 +03:00

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/*
* 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_TLSv1_3
SSL_CTX_clear_options(ssl->ctx, SSL_OP_NO_TLSv1_3);
if (!(protocols & NGX_SSL_TLSv1_3)) {
SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_TLSv1_3);
}
#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)
&& SSL_is_server((ngx_ssl_conn_t *) ssl_conn))
{
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_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
}
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