/*
- * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
#include <stdlib.h>
#include <assert.h>
#include "internal/thread_once.h"
+#include "internal/dso_conf.h"
#include "internal/dso.h"
#include "internal/store.h"
static int stopped = 0;
-static void ossl_init_thread_stop(struct thread_local_inits_st *locals);
+/*
+ * Since per-thread-specific-data destructors are not universally
+ * available, i.e. not on Windows, only below CRYPTO_THREAD_LOCAL key
+ * is assumed to have destructor associated. And then an effort is made
+ * to call this single destructor on non-pthread platform[s].
+ *
+ * Initial value is "impossible". It is used as guard value to shortcut
+ * destructor for threads terminating before libcrypto is initialized or
+ * after it's de-initialized. Access to the key doesn't have to be
+ * serialized for the said threads, because they didn't use libcrypto
+ * and it doesn't matter if they pick "impossible" or derefernce real
+ * key value and pull NULL past initialization in the first thread that
+ * intends to use libcrypto.
+ */
+static union {
+ long sane;
+ CRYPTO_THREAD_LOCAL value;
+} destructor_key = { -1 };
-static CRYPTO_THREAD_LOCAL threadstopkey;
+static void ossl_init_thread_stop(struct thread_local_inits_st *locals);
-static void ossl_init_thread_stop_wrap(void *local)
+static void ossl_init_thread_destructor(void *local)
{
ossl_init_thread_stop((struct thread_local_inits_st *)local);
}
static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
{
struct thread_local_inits_st *local =
- CRYPTO_THREAD_get_local(&threadstopkey);
+ CRYPTO_THREAD_get_local(&destructor_key.value);
- if (local == NULL && alloc) {
- local = OPENSSL_zalloc(sizeof(*local));
- if (local != NULL && !CRYPTO_THREAD_set_local(&threadstopkey, local)) {
+ if (alloc) {
+ if (local == NULL
+ && (local = OPENSSL_zalloc(sizeof(*local))) != NULL
+ && !CRYPTO_THREAD_set_local(&destructor_key.value, local)) {
OPENSSL_free(local);
return NULL;
}
- }
- if (!alloc) {
- CRYPTO_THREAD_set_local(&threadstopkey, NULL);
+ } else {
+ CRYPTO_THREAD_set_local(&destructor_key.value, NULL);
}
return local;
static int base_inited = 0;
DEFINE_RUN_ONCE_STATIC(ossl_init_base)
{
+ CRYPTO_THREAD_LOCAL key;
+
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_base: Setting up stop handlers\n");
#endif
#ifndef OPENSSL_NO_CRYPTO_MDEBUG
ossl_malloc_setup_failures();
#endif
- /*
- * We use a dummy thread local key here. We use the destructor to detect
- * when the thread is going to stop (where that feature is available)
- */
- CRYPTO_THREAD_init_local(&threadstopkey, ossl_init_thread_stop_wrap);
-#ifndef OPENSSL_SYS_UEFI
- atexit(OPENSSL_cleanup);
-#endif
- if ((init_lock = CRYPTO_THREAD_lock_new()) == NULL)
+ if (!CRYPTO_THREAD_init_local(&key, ossl_init_thread_destructor))
return 0;
+ if ((init_lock = CRYPTO_THREAD_lock_new()) == NULL)
+ goto err;
OPENSSL_cpuid_setup();
- /*
- * BIG FAT WARNING!
- * Everything needed to be initialized in this function before threads
- * come along MUST happen before base_inited is set to 1, or we will
- * see race conditions.
- */
+ destructor_key.value = key;
base_inited = 1;
+ return 1;
+
+err:
+#ifdef OPENSSL_INIT_DEBUG
+ fprintf(stderr, "OPENSSL_INIT: ossl_init_base not ok!\n");
+#endif
+ CRYPTO_THREAD_lock_free(init_lock);
+ init_lock = NULL;
+
+ CRYPTO_THREAD_cleanup_local(&key);
+ return 0;
+}
+
+static CRYPTO_ONCE register_atexit = CRYPTO_ONCE_STATIC_INIT;
+#if !defined(OPENSSL_SYS_UEFI) && defined(_WIN32)
+static int win32atexit(void)
+{
+ OPENSSL_cleanup();
+ return 0;
+}
+#endif
-#if !defined(OPENSSL_NO_DSO) && !defined(OPENSSL_USE_NODELETE)
+DEFINE_RUN_ONCE_STATIC(ossl_init_register_atexit)
+{
+#ifdef OPENSSL_INIT_DEBUG
+ fprintf(stderr, "OPENSSL_INIT: ossl_init_register_atexit()\n");
+#endif
+#ifndef OPENSSL_SYS_UEFI
+# ifdef _WIN32
+ /* We use _onexit() in preference because it gets called on DLL unload */
+ if (_onexit(win32atexit) == NULL)
+ return 0;
+# else
+ if (atexit(OPENSSL_cleanup) != 0)
+ return 0;
+# endif
+#endif
+
+ return 1;
+}
+
+DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_register_atexit,
+ ossl_init_register_atexit)
+{
+#ifdef OPENSSL_INIT_DEBUG
+ fprintf(stderr, "OPENSSL_INIT: ossl_init_no_register_atexit ok!\n");
+#endif
+ /* Do nothing in this case */
+ return 1;
+}
+
+static CRYPTO_ONCE load_crypto_nodelete = CRYPTO_ONCE_STATIC_INIT;
+DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_nodelete)
+{
+#ifdef OPENSSL_INIT_DEBUG
+ fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_nodelete()\n");
+#endif
+#if !defined(OPENSSL_NO_DSO) \
+ && !defined(OPENSSL_USE_NODELETE) \
+ && !defined(OPENSSL_NO_PINSHARED)
# ifdef DSO_WIN32
{
HMODULE handle = NULL;
| GET_MODULE_HANDLE_EX_FLAG_PIN,
(void *)&base_inited, &handle);
+# ifdef OPENSSL_INIT_DEBUG
+ fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n",
+ (ret == TRUE ? "No!" : "Yes."));
+# endif
return (ret == TRUE) ? 1 : 0;
}
# else
* to remain loaded until the atexit() handler is run at process exit.
*/
{
- DSO *dso = NULL;
+ DSO *dso;
+ void *err;
+
+ if (!err_shelve_state(&err))
+ return 0;
- ERR_set_mark();
dso = DSO_dsobyaddr(&base_inited, DSO_FLAG_NO_UNLOAD_ON_FREE);
+# ifdef OPENSSL_INIT_DEBUG
+ fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n",
+ (dso == NULL ? "No!" : "Yes."));
+ /*
+ * In case of No!, it is uncertain our exit()-handlers can still be
+ * called. After dlclose() the whole library might have been unloaded
+ * already.
+ */
+# endif
DSO_free(dso);
- ERR_pop_to_mark();
+ err_unshelve_state(err);
}
# endif
#endif
static CRYPTO_ONCE load_crypto_strings = CRYPTO_ONCE_STATIC_INIT;
static int load_crypto_strings_inited = 0;
-DEFINE_RUN_ONCE_STATIC(ossl_init_no_load_crypto_strings)
-{
- /* Do nothing in this case */
- return 1;
-}
-
DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_strings)
{
int ret = 1;
return ret;
}
+DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_load_crypto_strings,
+ ossl_init_load_crypto_strings)
+{
+ /* Do nothing in this case */
+ return 1;
+}
+
static CRYPTO_ONCE add_all_ciphers = CRYPTO_ONCE_STATIC_INIT;
DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_ciphers)
{
return 1;
}
+DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_ciphers,
+ ossl_init_add_all_ciphers)
+{
+ /* Do nothing */
+ return 1;
+}
+
static CRYPTO_ONCE add_all_digests = CRYPTO_ONCE_STATIC_INIT;
DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_digests)
{
return 1;
}
-DEFINE_RUN_ONCE_STATIC(ossl_init_no_add_algs)
+DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_digests,
+ ossl_init_add_all_digests)
{
/* Do nothing */
return 1;
static CRYPTO_ONCE config = CRYPTO_ONCE_STATIC_INIT;
static int config_inited = 0;
-static const char *appname;
+static const OPENSSL_INIT_SETTINGS *conf_settings = NULL;
DEFINE_RUN_ONCE_STATIC(ossl_init_config)
{
-#ifdef OPENSSL_INIT_DEBUG
- fprintf(stderr,
- "OPENSSL_INIT: ossl_init_config: openssl_config(%s)\n",
- appname == NULL ? "NULL" : appname);
-#endif
- openssl_config_int(appname);
+ int ret = openssl_config_int(conf_settings);
config_inited = 1;
- return 1;
+ return ret;
}
-DEFINE_RUN_ONCE_STATIC(ossl_init_no_config)
+DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_config, ossl_init_config)
{
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr,
if (locals->async) {
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
- "ASYNC_cleanup_thread()\n");
+ "async_delete_thread_state()\n");
#endif
- ASYNC_cleanup_thread();
+ async_delete_thread_state();
}
if (locals->err_state) {
err_delete_thread_state();
}
+ if (locals->rand) {
+#ifdef OPENSSL_INIT_DEBUG
+ fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
+ "drbg_delete_thread_state()\n");
+#endif
+ drbg_delete_thread_state();
+ }
+
OPENSSL_free(locals);
}
void OPENSSL_thread_stop(void)
{
- ossl_init_thread_stop(
- (struct thread_local_inits_st *)ossl_init_get_thread_local(0));
+ if (destructor_key.sane != -1)
+ ossl_init_thread_stop(ossl_init_get_thread_local(0));
}
int ossl_init_thread_start(uint64_t opts)
locals->err_state = 1;
}
+ if (opts & OPENSSL_INIT_THREAD_RAND) {
+#ifdef OPENSSL_INIT_DEBUG
+ fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
+ "marking thread for rand\n");
+#endif
+ locals->rand = 1;
+ }
+
return 1;
}
void OPENSSL_cleanup(void)
{
OPENSSL_INIT_STOP *currhandler, *lasthandler;
+ CRYPTO_THREAD_LOCAL key;
/* If we've not been inited then no need to deinit */
if (!base_inited)
err_free_strings_int();
}
- CRYPTO_THREAD_cleanup_local(&threadstopkey);
+ key = destructor_key.value;
+ destructor_key.sane = -1;
+ CRYPTO_THREAD_cleanup_local(&key);
#ifdef OPENSSL_INIT_DEBUG
fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
obj_cleanup_int();
err_cleanup();
+ CRYPTO_secure_malloc_done();
+
base_inited = 0;
}
*/
int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
{
- static int stoperrset = 0;
-
if (stopped) {
- if (!stoperrset) {
- /*
- * We only ever set this once to avoid getting into an infinite
- * loop where the error system keeps trying to init and fails so
- * sets an error etc
- */
- stoperrset = 1;
+ if (!(opts & OPENSSL_INIT_BASE_ONLY))
CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
- }
return 0;
}
- if (!base_inited && !RUN_ONCE(&base, ossl_init_base))
+ /*
+ * When the caller specifies OPENSSL_INIT_BASE_ONLY, that should be the
+ * *only* option specified. With that option we return immediately after
+ * doing the requested limited initialization. Note that
+ * err_shelve_state() called by us via ossl_init_load_crypto_nodelete()
+ * re-enters OPENSSL_init_crypto() with OPENSSL_INIT_BASE_ONLY, but with
+ * base already initialized this is a harmless NOOP.
+ *
+ * If we remain the only caller of err_shelve_state() the recursion should
+ * perhaps be removed, but if in doubt, it can be left in place.
+ */
+ if (!RUN_ONCE(&base, ossl_init_base))
+ return 0;
+ if (opts & OPENSSL_INIT_BASE_ONLY)
+ return 1;
+
+ /*
+ * Now we don't always set up exit handlers, the INIT_BASE_ONLY calls
+ * should not have the side-effect of setting up exit handlers, and
+ * therefore, this code block is below the INIT_BASE_ONLY-conditioned early
+ * return above.
+ */
+ if ((opts & OPENSSL_INIT_NO_ATEXIT) != 0) {
+ if (!RUN_ONCE_ALT(®ister_atexit, ossl_init_no_register_atexit,
+ ossl_init_register_atexit))
+ return 0;
+ } else if (!RUN_ONCE(®ister_atexit, ossl_init_register_atexit)) {
+ return 0;
+ }
+
+ if (!RUN_ONCE(&load_crypto_nodelete, ossl_init_load_crypto_nodelete))
return 0;
if ((opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
- && !RUN_ONCE(&load_crypto_strings,
- ossl_init_no_load_crypto_strings))
+ && !RUN_ONCE_ALT(&load_crypto_strings,
+ ossl_init_no_load_crypto_strings,
+ ossl_init_load_crypto_strings))
return 0;
if ((opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
return 0;
if ((opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
- && !RUN_ONCE(&add_all_ciphers, ossl_init_no_add_algs))
+ && !RUN_ONCE_ALT(&add_all_ciphers, ossl_init_no_add_all_ciphers,
+ ossl_init_add_all_ciphers))
return 0;
if ((opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
return 0;
if ((opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
- && !RUN_ONCE(&add_all_digests, ossl_init_no_add_algs))
+ && !RUN_ONCE_ALT(&add_all_digests, ossl_init_no_add_all_digests,
+ ossl_init_add_all_digests))
return 0;
if ((opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
return 0;
if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG)
- && !RUN_ONCE(&config, ossl_init_no_config))
+ && !RUN_ONCE_ALT(&config, ossl_init_no_config, ossl_init_config))
return 0;
if (opts & OPENSSL_INIT_LOAD_CONFIG) {
int ret;
CRYPTO_THREAD_write_lock(init_lock);
- appname = (settings == NULL) ? NULL : settings->appname;
+ conf_settings = settings;
ret = RUN_ONCE(&config, ossl_init_config);
+ conf_settings = NULL;
CRYPTO_THREAD_unlock(init_lock);
if (!ret)
return 0;
{
OPENSSL_INIT_STOP *newhand;
-#if !defined(OPENSSL_NO_DSO) && !defined(OPENSSL_USE_NODELETE)
+#if !defined(OPENSSL_NO_DSO) \
+ && !defined(OPENSSL_USE_NODELETE)\
+ && !defined(OPENSSL_NO_PINSHARED)
{
union {
void *sym;
ERR_set_mark();
dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE);
+# ifdef OPENSSL_INIT_DEBUG
+ fprintf(stderr,
+ "OPENSSL_INIT: OPENSSL_atexit: obtained DSO reference? %s\n",
+ (dso == NULL ? "No!" : "Yes."));
+ /* See same code above in ossl_init_base() for an explanation. */
+# endif
DSO_free(dso);
ERR_pop_to_mark();
}
}
#endif
- newhand = OPENSSL_malloc(sizeof(*newhand));
- if (newhand == NULL)
+ if ((newhand = OPENSSL_malloc(sizeof(*newhand))) == NULL) {
+ CRYPTOerr(CRYPTO_F_OPENSSL_ATEXIT, ERR_R_MALLOC_FAILURE);
return 0;
+ }
newhand->handler = handler;
newhand->next = stop_handlers;
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