[PATCH 5 of 6] SSL: caching CRLs
Sergey Kandaurov
pluknet at nginx.com
Wed Aug 21 22:04:56 UTC 2024
# HG changeset patch
# User Sergey Kandaurov <pluknet at nginx.com>
# Date 1721762914 0
# Tue Jul 23 19:28:34 2024 +0000
# Node ID 09a8f17d87eccf5ae735815b50c9ee701d2a4ff7
# Parent de586726466a08cbdecb8d70f5f42e9067e9ccb8
SSL: caching CRLs.
Based on previous work by Mini Hawthorne.
diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
--- a/src/event/ngx_event_openssl.c
+++ b/src/event/ngx_event_openssl.c
@@ -18,6 +18,7 @@ typedef struct {
} ngx_openssl_conf_t;
+static ngx_inline ngx_int_t ngx_ssl_cert_already_in_hash(void);
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);
@@ -741,17 +742,16 @@ ngx_ssl_trusted_certificate(ngx_conf_t *
ngx_int_t
ngx_ssl_crl(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *crl)
{
- X509_STORE *store;
- X509_LOOKUP *lookup;
+ int n, i;
+ char *err;
+ X509_CRL *x509;
+ X509_STORE *store;
+ STACK_OF(X509_CRL) *chain;
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) {
@@ -760,21 +760,36 @@ ngx_ssl_crl(ngx_conf_t *cf, ngx_ssl_t *s
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");
+ chain = ngx_ssl_cache_fetch(cf, NGX_SSL_CACHE_CRL, &err, crl, NULL);
+
+ if (chain == NULL) {
+ if (err != NULL) {
+ ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
+ "cannot load CRL \"%s\": %s", crl->data, err);
+ }
+
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;
- }
+ n = sk_X509_CRL_num(chain);
+
+ for (i = 0; i < n; i++) {
+ x509 = sk_X509_CRL_value(chain, i);
+
+ if (X509_STORE_add_crl(store, x509) != 1) {
+
+ if (ngx_ssl_cert_already_in_hash()) {
+ continue;
+ }
+
+ ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
+ "X509_STORE_add_crl(\"%s\") failed", crl->data);
+ sk_X509_CRL_pop_free(chain, X509_CRL_free);
+ return NGX_ERROR;
+ }
+ }
+
+ sk_X509_CRL_pop_free(chain, X509_CRL_free);
X509_STORE_set_flags(store,
X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL);
@@ -783,6 +798,27 @@ ngx_ssl_crl(ngx_conf_t *cf, ngx_ssl_t *s
}
+static ngx_inline ngx_int_t
+ngx_ssl_cert_already_in_hash(void)
+{
+#if !(OPENSSL_VERSION_NUMBER >= 0x1010009fL \
+ || LIBRESSL_VERSION_NUMBER >= 0x3050000fL)
+ u_long error;
+
+ error = ERR_peek_last_error();
+
+ if (ERR_GET_LIB(error) == ERR_LIB_X509
+ && ERR_GET_REASON(error) == X509_R_CERT_ALREADY_IN_HASH_TABLE)
+ {
+ ERR_clear_error();
+ return 1;
+ }
+#endif
+
+ return 0;
+}
+
+
static int
ngx_ssl_verify_callback(int ok, X509_STORE_CTX *x509_store)
{
diff --git a/src/event/ngx_event_openssl.h b/src/event/ngx_event_openssl.h
--- a/src/event/ngx_event_openssl.h
+++ b/src/event/ngx_event_openssl.h
@@ -204,6 +204,7 @@ typedef struct {
#define NGX_SSL_CACHE_CERT 0
#define NGX_SSL_CACHE_KEY 1
+#define NGX_SSL_CACHE_CRL 2
ngx_int_t ngx_ssl_init(ngx_log_t *log);
diff --git a/src/event/ngx_event_openssl_cache.c b/src/event/ngx_event_openssl_cache.c
--- a/src/event/ngx_event_openssl_cache.c
+++ b/src/event/ngx_event_openssl_cache.c
@@ -49,6 +49,10 @@ static int ngx_ssl_cache_key_password_ca
static void ngx_ssl_cache_key_free(void *data);
static void *ngx_ssl_cache_key_ref(char **err, void *data);
+static void *ngx_ssl_cache_crl_create(ngx_str_t *id, char **err, void *data);
+static void ngx_ssl_cache_crl_free(void *data);
+static void *ngx_ssl_cache_crl_ref(char **err, void *data);
+
static BIO *ngx_ssl_cache_create_bio(ngx_str_t *id, char **err);
static void *ngx_openssl_cache_create_conf(ngx_cycle_t *cycle);
@@ -91,6 +95,11 @@ static ngx_ssl_cache_type_t ngx_ssl_cac
{ ngx_ssl_cache_key_create,
ngx_ssl_cache_key_free,
ngx_ssl_cache_key_ref },
+
+ /* NGX_SSL_CACHE_CRL */
+ { ngx_ssl_cache_crl_create,
+ ngx_ssl_cache_crl_free,
+ ngx_ssl_cache_crl_ref },
};
@@ -474,6 +483,100 @@ ngx_ssl_cache_key_ref(char **err, void *
}
+static void *
+ngx_ssl_cache_crl_create(ngx_str_t *id, char **err, void *data)
+{
+ BIO *bio;
+ u_long n;
+ X509_CRL *x509;
+ STACK_OF(X509_CRL) *chain;
+
+ chain = sk_X509_CRL_new_null();
+ if (chain == NULL) {
+ *err = "sk_X509_CRL_new_null() failed";
+ return NULL;
+ }
+
+ bio = ngx_ssl_cache_create_bio(id, err);
+ if (bio == NULL) {
+ sk_X509_CRL_pop_free(chain, X509_CRL_free);
+ return NULL;
+ }
+
+ for ( ;; ) {
+
+ x509 = PEM_read_bio_X509_CRL(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
+ && sk_X509_CRL_num(chain) > 0)
+ {
+ /* end of file */
+ ERR_clear_error();
+ break;
+ }
+
+ /* some real error */
+
+ *err = "PEM_read_bio_X509_CRL() failed";
+ BIO_free(bio);
+ sk_X509_CRL_pop_free(chain, X509_CRL_free);
+ return NULL;
+ }
+
+ if (sk_X509_CRL_push(chain, x509) == 0) {
+ *err = "sk_X509_CRL_push() failed";
+ BIO_free(bio);
+ X509_CRL_free(x509);
+ sk_X509_CRL_pop_free(chain, X509_CRL_free);
+ return NULL;
+ }
+ }
+
+ BIO_free(bio);
+
+ return chain;
+}
+
+
+static void
+ngx_ssl_cache_crl_free(void *data)
+{
+ sk_X509_CRL_pop_free(data, X509_CRL_free);
+}
+
+
+static void *
+ngx_ssl_cache_crl_ref(char **err, void *data)
+{
+ int n, i;
+ X509_CRL *x509;
+ STACK_OF(X509_CRL) *chain;
+
+ chain = sk_X509_CRL_dup(data);
+ if (chain == NULL) {
+ *err = "sk_X509_CRL_dup() failed";
+ return NULL;
+ }
+
+ n = sk_X509_CRL_num(chain);
+
+ for (i = 0; i < n; i++) {
+ x509 = sk_X509_CRL_value(chain, i);
+
+#if (OPENSSL_VERSION_NUMBER >= 0x10100000L)
+ X509_CRL_up_ref(x509);
+#else
+ CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509_CRL);
+#endif
+ }
+
+ return chain;
+}
+
+
static BIO *
ngx_ssl_cache_create_bio(ngx_str_t *id, char **err)
{
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