Provide framework for auto initialise/deinitialise of the library

This commit provides the basis and core code for an auto initialisation
and deinitialisation framework for libcrypto and libssl. The intention is
to remove the need (in many circumstances) to call explicit initialise and
deinitialise functions. Explicit initialisation will still be an option,
and if non-default initialisation is needed then it will be required.
Similarly for de-initialisation (although this will be a lot easier since
it will bring all de-initialisation into a single function).

Reviewed-by: Richard Levitte <levitte@openssl.org>

1 files changed, 775 insertions, 0 deletions

diff --git a/crypto/init.c b/crypto/init.c
new file mode 100644
index 0000000000..8950ff6797
--- /dev/null
+++ b/crypto/init.c
@@ -0,0 +1,775 @@
+/*
+ * Written by Matt Caswell for the OpenSSL project.
+ */
+/* ====================================================================
+ * Copyright (c) 2016 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <openssl/e_os2.h>
+
+#if defined(OPENSSL_SYS_WINDOWS) && !defined(_WIN32_WINNT)
+/*
+ * We default to requiring Windows Vista, Windows Server 2008 or later. We can
+ * support lower versions if _WIN32_WINNT is explicity defined to something
+ * less
+ */
+# define _WIN32_WINNT 0x0600
+#endif
+
+#include <internal/cryptlib_int.h>
+#include <openssl/err.h>
+#include <openssl/evp.h>
+#if 0
+#include <internal/evp_int.h>
+#include <internal/conf.h>
+#include <internal/async.h>
+#include <internal/engine.h>
+#endif
+#include <openssl/conf.h>
+#include <openssl/async.h>
+#include <openssl/engine.h>
+#include <openssl/comp.h>
+#if 0
+#include <internal/err.h>
+#endif
+#include <stdlib.h>
+
+/* Implement "once" functionality */
+#if !defined(OPENSSL_THREADS)
+typedef int OPENSSL_INIT_ONCE;
+# define OPENSSL_INIT_ONCE_STATIC_INIT          0
+# define OPENSSL_INIT_ONCE_DYNAMIC_INIT(once)   (*(once) = 0)
+
+static void ossl_init_once_run(OPENSSL_INIT_ONCE *once, void (*init)(void))
+{
+    if (*once == OPENSSL_INIT_ONCE_STATIC_INIT) {
+        *once = 1;
+        init();
+    }
+}
+
+static int ossl_init_setup_thread_stop(void)
+{
+    /*
+     * There are no threads to stop. Do nothing.
+     */
+    return 1;
+}
+
+static void ossl_init_thread_stop_cleanup(void)
+{
+}
+
+static struct thread_local_inits_st *local = NULL;
+void *ossl_init_get_thread_local(int alloc)
+{
+    if (local == NULL && alloc)
+        local = OPENSSL_zalloc(sizeof(*local));
+    return local;
+}
+
+#elif defined(OPENSSL_SYS_WINDOWS)
+
+# include <windows.h>
+
+# if _WIN32_WINNT < 0x0600
+
+/*
+ * Versions before 0x0600 (Windows Vista, Windows Server 2008 or later) do not
+ * have InitOnceExecuteOnce, so we fall back to using a spinlock instead.
+ */
+typedef LONG OPENSSL_INIT_ONCE;
+#  define OPENSSL_INIT_ONCE_STATIC_INIT          0
+#  define OPENSSL_INIT_ONCE_DYNAMIC_INIT(once)   (*(once) = 0)
+
+#  define ONCE_UNINITED     0
+#  define ONCE_ININIT       1
+#  define ONCE_DONE         2
+
+static void ossl_init_once_run(OPENSSL_INIT_ONCE *once, void (*init)(void))
+{
+    LONG volatile *lock = (LONG *)once;
+    LONG result;
+
+    if (*lock == ONCE_DONE)
+        return;
+
+    do {
+        result = InterlockedCompareExchange(lock, ONCE_ININIT, ONCE_UNINITED);
+        if (result == ONCE_UNINITED) {
+            init();
+            *lock = ONCE_DONE;
+            return;
+        }
+    } while (result == ONCE_ININIT);
+}
+
+# else
+
+typedef INIT_ONCE OPENSSL_INIT_ONCE;
+#  define OPENSSL_INIT_ONCE_STATIC_INIT          INIT_ONCE_STATIC_INIT
+#  define OPENSSL_INIT_ONCE_DYNAMIC_INIT(once) \
+                InitOnceInitialize((PINIT_ONCE)(once))
+
+static BOOL CALLBACK once_cb(PINIT_ONCE once, PVOID initfp, PVOID *unused)
+{
+    void (*init)(void) = initfp;
+
+    init();
+
+    return TRUE;
+}
+
+static void ossl_init_once_run(OPENSSL_INIT_ONCE *once, void (*init)(void))
+{
+    InitOnceExecuteOnce((INIT_ONCE *)once, once_cb, init, NULL);
+}
+# endif
+
+DWORD threadstopkey = TLS_OUT_OF_INDEXES;
+
+static int ossl_init_setup_thread_stop(void)
+{
+    /*
+     * We use a dummy thread local key here. We use the destructor to detect
+     * when the thread is going to stop
+     */
+    threadstopkey = TlsAlloc();
+    if (threadstopkey == TLS_OUT_OF_INDEXES)
+        return 0;
+
+    return 1;
+}
+
+static void ossl_init_thread_stop_cleanup(void)
+{
+    if (threadstopkey != TLS_OUT_OF_INDEXES) {
+        TlsFree(threadstopkey);
+    }
+}
+
+void *ossl_init_get_thread_local(int alloc)
+{
+    struct thread_local_inits_st *local = TlsGetValue(threadstopkey);
+
+    if (local == NULL && alloc) {
+        local = OPENSSL_zalloc(sizeof *local);
+        TlsSetValue(threadstopkey, local);
+    }
+
+    return local;
+}
+
+#else /* pthreads */
+# include <pthread.h>
+
+pthread_key_t threadstopkey;
+
+typedef pthread_once_t OPENSSL_INIT_ONCE;
+# define OPENSSL_INIT_ONCE_STATIC_INIT          PTHREAD_ONCE_INIT
+# define OPENSSL_INIT_ONCE_DYNAMIC_INIT(once)   (*(once) = PTHREAD_ONCE_INIT)
+
+static void ossl_init_once_run(OPENSSL_INIT_ONCE *once, void (*init)(void))
+{
+    pthread_once(once, init);
+}
+
+static void ossl_init_thread_stop_wrap(void *local)
+{
+    ossl_init_thread_stop((struct thread_local_inits_st *)local);
+}
+
+static int ossl_init_setup_thread_stop(void)
+{
+    /*
+     * We use a dummy thread local key here. We use the destructor to detect
+     * when the thread is going to stop
+     */
+    return (pthread_key_create(&threadstopkey,
+                               ossl_init_thread_stop_wrap) == 0);
+}
+
+static void ossl_init_thread_stop_cleanup(void)
+{
+}
+
+void *ossl_init_get_thread_local(int alloc)
+{
+    struct thread_local_inits_st *local = pthread_getspecific(threadstopkey);
+
+    if (local == NULL && alloc) {
+        local = OPENSSL_zalloc(sizeof *local);
+        pthread_setspecific(threadstopkey, local);
+    }
+
+    return local;
+}
+
+#endif
+
+struct ossl_init_stop_st {
+    void (*handler)(void);
+    OPENSSL_INIT_STOP *next;
+};
+
+static OPENSSL_INIT_STOP *stop_handlers = NULL;
+
+static OPENSSL_INIT_ONCE base = OPENSSL_INIT_ONCE_STATIC_INIT;
+static int base_inited = 0;
+static void ossl_init_base(void)
+{
+#ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr, "OPENSSL_INIT: ossl_init_base: Setting up stop handlers\n");
+#endif
+    ossl_init_setup_thread_stop();
+    atexit(OPENSSL_INIT_library_stop);
+    OPENSSL_cpuid_setup();
+    base_inited = 1;
+}
+
+static OPENSSL_INIT_ONCE load_crypto_strings = OPENSSL_INIT_ONCE_STATIC_INIT;
+static int load_crypto_strings_inited = 0;
+static void ossl_init_no_load_crypto_strings(void)
+{
+    /* Do nothing in this case */
+    return;
+}
+
+static void ossl_init_load_crypto_strings(void)
+{
+#ifndef OPENSSL_NO_ERR
+# ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_strings: "
+                    "err_load_crypto_strings_intern()\n");
+# endif
+#if 0
+    err_load_crypto_strings_intern();
+#endif
+#endif
+    load_crypto_strings_inited = 1;
+}
+
+static OPENSSL_INIT_ONCE add_all_ciphers = OPENSSL_INIT_ONCE_STATIC_INIT;
+static void ossl_init_add_all_ciphers(void)
+{
+    /*
+     * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
+     * pulling in all the ciphers during static linking
+     */
+#ifndef OPENSSL_NO_AUTOALGINIT
+# ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_ciphers: "
+                    "openssl_add_all_ciphers_internal()\n");
+# endif
+#if 0
+    openssl_add_all_ciphers_internal();
+#endif
+# ifndef OPENSSL_NO_ENGINE
+#  if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV)
+    ENGINE_setup_bsd_cryptodev();
+#  endif
+# endif
+#endif
+}
+
+static OPENSSL_INIT_ONCE add_all_digests = OPENSSL_INIT_ONCE_STATIC_INIT;
+static void ossl_init_add_all_digests(void)
+{
+    /*
+     * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
+     * pulling in all the ciphers during static linking
+     */
+#ifndef OPENSSL_NO_AUTOALGINIT
+# ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_digests: "
+                    "openssl_add_all_digests_internal()\n");
+# endif
+#if 0
+    openssl_add_all_digests_internal();
+#endif
+# ifndef OPENSSL_NO_ENGINE
+#  if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV)
+    ENGINE_setup_bsd_cryptodev();
+#  endif
+# endif
+#endif
+}
+
+static void ossl_init_no_add_algs(void)
+{
+    /* Do nothing */
+    return;
+}
+
+static OPENSSL_INIT_ONCE config = OPENSSL_INIT_ONCE_STATIC_INIT;
+static int config_inited = 0;
+static const char *config_filename;
+static void ossl_init_config(void)
+{
+#ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr,
+            "OPENSSL_INIT: ossl_init_config: openssl_config_internal(%s)\n",
+            config_filename==NULL?"NULL":config_filename);
+#endif
+#if 0
+    openssl_config_internal(config_filename);
+#endif
+    config_inited = 1;
+}
+static void ossl_init_no_config(void)
+{
+#ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr,
+            "OPENSSL_INIT: ossl_init_config: openssl_no_config_internal()\n");
+#endif
+#if 0
+    openssl_no_config_internal();
+#endif
+    config_inited = 1;
+}
+
+static OPENSSL_INIT_ONCE async = OPENSSL_INIT_ONCE_STATIC_INIT;
+static int async_inited = 0;
+static void ossl_init_async(void)
+{
+#ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr, "OPENSSL_INIT: ossl_init_async: async_init()\n");
+#endif
+#if 0
+    async_init();
+#endif
+    async_inited = 1;
+}
+
+#ifndef OPENSSL_NO_ENGINE
+static int engine_inited = 0;
+static OPENSSL_INIT_ONCE engine_openssl = OPENSSL_INIT_ONCE_STATIC_INIT;
+static void ossl_init_engine_openssl(void)
+{
+# ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_openssl: "
+                    "engine_load_openssl_internal()\n");
+# endif
+#if 0
+    engine_load_openssl_internal();
+#endif
+    engine_inited = 1;
+}
+# if !defined(OPENSSL_NO_HW) && \
+    (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV))
+static OPENSSL_INIT_ONCE engine_cryptodev = OPENSSL_INIT_ONCE_STATIC_INIT;
+static void ossl_init_engine_cryptodev(void)
+{
+#  ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_cryptodev: "
+                    "engine_load_cryptodev_internal()\n");
+#  endif
+#if 0
+    engine_load_cryptodev_internal();
+#endif
+    engine_inited = 1;
+}
+# endif
+
+# ifndef OPENSSL_NO_RDRAND
+static OPENSSL_INIT_ONCE engine_rdrand = OPENSSL_INIT_ONCE_STATIC_INIT;
+static void ossl_init_engine_rdrand(void)
+{
+#  ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_rdrand: "
+                    "engine_load_rdrand_internal()\n");
+#  endif
+#if 0
+    engine_load_rdrand_internal();
+#endif
+    engine_inited = 1;
+}
+# endif
+static OPENSSL_INIT_ONCE engine_dynamic = OPENSSL_INIT_ONCE_STATIC_INIT;
+static void ossl_init_engine_dynamic(void)
+{
+# ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dynamic: "
+                    "engine_load_dynamic_internal()\n");
+# endif
+#if 0
+    engine_load_dynamic_internal();
+#endif
+    engine_inited = 1;
+}
+# ifndef OPENSSL_NO_STATIC_ENGINE
+#  if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
+static OPENSSL_INIT_ONCE engine_padlock = OPENSSL_INIT_ONCE_STATIC_INIT;
+static void ossl_init_engine_padlock(void)
+{
+#   ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_padlock: "
+                    "engine_load_padlock_internal()\n");
+#   endif
+#if 0
+    engine_load_padlock_internal();
+#endif
+    engine_inited = 1;
+}
+#  endif
+#  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
+static OPENSSL_INIT_ONCE engine_capi = OPENSSL_INIT_ONCE_STATIC_INIT;
+static void ossl_init_engine_capi(void)
+{
+#   ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_capi: "
+                    "engine_load_capi_internal()\n");
+#   endif
+#if 0
+    engine_load_capi_internal();
+#endif
+    engine_inited = 1;
+}
+#  endif
+static OPENSSL_INIT_ONCE engine_dasync = OPENSSL_INIT_ONCE_STATIC_INIT;
+static void ossl_init_engine_dasync(void)
+{
+# ifdef OPENSSL_INIT_DEBUG
+    fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dasync: "
+                    "engine_load_dasync_internal()\n");
+# endif
+#if 0
+    engine_load_dasync_internal();
+#endif
+    engine_inited = 1;
+}
+# endif
+#endif
+
+static OPENSSL_INIT_ONCE zlib = OPENSSL_INIT_ONCE_STATIC_INIT;
+static int zlib_inited = 0;
+static void ossl_init_zlib(void)
+{
+    /* Do nothing - we need to know about this for the later cleanup */
+    zlib_inited = 1;
+}
+
+void ossl_init_thread_stop(struct thread_local_inits_st *locals)
+{
+    /* Can't do much about this */
+    if (locals == NULL)
+        return;
+
+    if (locals->async) {
+#ifdef OPENSSL_INIT_DEBUG
+        fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
+                        "ASYNC_cleanup_thread()\n");
+#endif
+        ASYNC_cleanup_thread();
+    }
+
+    if (locals->err_state) {
+#ifdef OPENSSL_INIT_DEBUG
+        fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
+                        "ERR_remove_thread_state(NULL)\n");
+#endif
+        ERR_remove_thread_state(NULL);
+    }
+
+    OPENSSL_free(locals);
+    ossl_init_thread_stop_cleanup();
+}
+
+int ossl_init_thread_start(uint64_t opts)
+{
+    struct thread_local_inits_st *locals = ossl_init_get_thread_local(1);
+
+    if (locals == NULL)
+        return 0;
+
+    if (opts & OPENSSL_INIT_THREAD_ASYNC) {
+#ifdef OPENSSL_INIT_DEBUG
+        fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
+                        "marking thread for async\n");
+#endif
+        locals->async = 1;
+    }
+
+    if (opts & OPENSSL_INIT_THREAD_ERR_STATE) {
+#ifdef OPENSSL_INIT_DEBUG
+        fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
+                        "marking thread for err_state\n");
+#endif
+        locals->err_state = 1;
+    }
+
+    return 1;
+}
+
+void OPENSSL_INIT_library_stop(void)
+{
+    OPENSSL_INIT_STOP *currhandler, *lasthandler;
+
+    /*
+     * Thread stop may not get automatically called by the thread library for
+     * the very last thread in some situations, so call it directly.
+     */
+    ossl_init_thread_stop(ossl_init_get_thread_local(0));
+
+    currhandler = stop_handlers;
+    while (currhandler != NULL) {
+        currhandler->handler();
+        lasthandler = currhandler;
+        currhandler = currhandler->next;
+        OPENSSL_free(lasthandler);
+    }
+    stop_handlers = NULL;
+    /*
+     * We assume we are single-threaded for this function, i.e. no race
+     * conditions for the various "*_inited" vars below.
+     */
+
+    if (zlib_inited) {
+#ifdef OPENSSL_INIT_DEBUG
+        fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
+                        "COMP_zlib_cleanup()\n");
+#endif
+        COMP_zlib_cleanup();
+        zlib_inited = 0;
+        OPENSSL_INIT_ONCE_DYNAMIC_INIT(&zlib);
+    }
+
+#ifndef OPENSSL_NO_ENGINE
+    if (engine_inited) {
+# ifdef OPENSSL_INIT_DEBUG
+        fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
+                        "ENGINE_cleanup()\n");
+# endif
+        ENGINE_cleanup();
+        engine_inited = 0;
+        OPENSSL_INIT_ONCE_DYNAMIC_INIT(&engine_openssl);
+# if !defined(OPENSSL_NO_HW) && \
+    (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV))
+        OPENSSL_INIT_ONCE_DYNAMIC_INIT(&engine_cryptodev);
+# endif
+# ifndef OPENSSL_NO_RDRAND
+        OPENSSL_INIT_ONCE_DYNAMIC_INIT(&engine_rdrand);
+# endif
+        OPENSSL_INIT_ONCE_DYNAMIC_INIT(&engine_dynamic);
+# ifndef OPENSSL_NO_STATIC_ENGINE
+#  if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
+        OPENSSL_INIT_ONCE_DYNAMIC_INIT(&engine_padlock);
+#  endif
+#  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
+        OPENSSL_INIT_ONCE_DYNAMIC_INIT(&engine_capi);
+#  endif
+        OPENSSL_INIT_ONCE_DYNAMIC_INIT(&engine_dasync);
+# endif
+    }
+#endif
+
+    async_inited = 0;
+    OPENSSL_INIT_ONCE_DYNAMIC_INIT(&async);
+
+    config_inited = 0;
+    OPENSSL_INIT_ONCE_DYNAMIC_INIT(&config);
+    OPENSSL_INIT_ONCE_DYNAMIC_INIT(&add_all_ciphers);
+    OPENSSL_INIT_ONCE_DYNAMIC_INIT(&add_all_digests);
+
+    if (load_crypto_strings_inited) {
+#ifdef OPENSSL_INIT_DEBUG
+        fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
+                        "ERR_free_strings()\n");
+#endif
+        ERR_free_strings();
+        load_crypto_strings_inited = 0;
+        OPENSSL_INIT_ONCE_DYNAMIC_INIT(&load_crypto_strings);
+    }
+
+    if (base_inited) {
+#ifdef OPENSSL_INIT_DEBUG
+        fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
+                        "CRYPTO_cleanup_all_ex_data()\n");
+        fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
+                        "EVP_cleanup()\n");
+        fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
+                        "CONF_modules_free()\n");
+        fprintf(stderr, "OPENSSL_INIT: OPENSSL_INIT_library_stop: "
+                        "RAND_cleanup()\n");
+#endif
+        CRYPTO_cleanup_all_ex_data();
+        EVP_cleanup();
+        CONF_modules_free();
+        RAND_cleanup();
+        base_inited = 0;
+        OPENSSL_INIT_ONCE_DYNAMIC_INIT(&base);
+    }
+}
+
+static const OPENSSL_INIT_SETTINGS *ossl_init_get_setting(
+        const OPENSSL_INIT_SETTINGS *settings, int name)
+{
+    if (settings == NULL)
+        return NULL;
+
+    while (settings->name != OPENSSL_INIT_SET_END) {
+        if (settings->name == name)
+            return settings;
+        settings++;
+    }
+
+    return NULL;
+}
+
+/*
+ * If this function is called with a non NULL settings value then it must be
+ * called prior to any threads making calls to any OpenSSL functions,
+ * i.e. passing a non-null settings value is assumed to be single-threaded.
+ */
+void OPENSSL_INIT_crypto_library_start(uint64_t opts,
+                                    const OPENSSL_INIT_SETTINGS *settings)
+{
+    ossl_init_once_run(&base, ossl_init_base);
+
+    if (opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
+        ossl_init_once_run(&load_crypto_strings,
+                           ossl_init_no_load_crypto_strings);
+
+    if (opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
+        ossl_init_once_run(&load_crypto_strings, ossl_init_load_crypto_strings);
+
+    if (opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
+        ossl_init_once_run(&add_all_ciphers, ossl_init_no_add_algs);
+
+    if (opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
+        ossl_init_once_run(&add_all_ciphers, ossl_init_add_all_ciphers);
+
+    if (opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
+        ossl_init_once_run(&add_all_digests, ossl_init_no_add_algs);
+
+    if (opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
+        ossl_init_once_run(&add_all_digests, ossl_init_add_all_digests);
+
+    if (opts & OPENSSL_INIT_NO_LOAD_CONFIG) {
+        ossl_init_once_run(&config, ossl_init_no_config);
+    }
+
+    if (opts & OPENSSL_INIT_LOAD_CONFIG) {
+        if (settings != NULL) {
+            const OPENSSL_INIT_SETTINGS *curr;
+            curr = ossl_init_get_setting(settings,
+                                         OPENSSL_INIT_SET_CONF_FILENAME);
+            config_filename = curr == NULL ? NULL : curr->value.type_string;
+        }
+        ossl_init_once_run(&config, ossl_init_config);
+    }
+
+    if (opts & OPENSSL_INIT_ASYNC) {
+        ossl_init_once_run(&async, ossl_init_async);
+    }
+
+#ifndef OPENSSL_NO_ENGINE
+    if (opts & OPENSSL_INIT_ENGINE_OPENSSL) {
+        ossl_init_once_run(&engine_openssl, ossl_init_engine_openssl);
+    }
+# if !defined(OPENSSL_NO_HW) && \
+    (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV))
+    if (opts & OPENSSL_INIT_ENGINE_CRYPTODEV) {
+        ossl_init_once_run(&engine_cryptodev, ossl_init_engine_cryptodev);
+    }
+# endif
+# ifndef OPENSSL_NO_RDRAND
+    if (opts & OPENSSL_INIT_ENGINE_RDRAND) {
+        ossl_init_once_run(&engine_rdrand, ossl_init_engine_rdrand);
+    }
+# endif
+    if (opts & OPENSSL_INIT_ENGINE_DYNAMIC) {
+        ossl_init_once_run(&engine_dynamic, ossl_init_engine_dynamic);
+    }
+# ifndef OPENSSL_NO_STATIC_ENGINE
+#  if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
+    if (opts & OPENSSL_INIT_ENGINE_PADLOCK) {
+        ossl_init_once_run(&engine_padlock, ossl_init_engine_padlock);
+    }
+#  endif
+#  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
+    if (opts & OPENSSL_INIT_ENGINE_CAPI) {
+        ossl_init_once_run(&engine_capi, ossl_init_engine_capi);
+    }
+#  endif
+    if (opts & OPENSSL_INIT_ENGINE_DASYNC) {
+        ossl_init_once_run(&engine_dasync, ossl_init_engine_dasync);
+    }
+# endif
+    if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN
+                | OPENSSL_INIT_ENGINE_DASYNC | OPENSSL_INIT_ENGINE_OPENSSL)) {
+        ENGINE_register_all_complete();
+    }
+#endif
+
+    if (opts & OPENSSL_INIT_ZLIB) {
+        ossl_init_once_run(&zlib, ossl_init_zlib);
+    }
+}
+
+int OPENSSL_INIT_register_stop_handler(void (*handler)(void))
+{
+    OPENSSL_INIT_STOP *newhand;
+
+    newhand = OPENSSL_malloc(sizeof(*newhand));
+    if (newhand == NULL)
+        return 0;
+
+    newhand->handler = handler;
+    newhand->next = stop_handlers;
+    stop_handlers = newhand;
+
+    return 1;
+}
+
+