Don't complain if we receive the cryptopro extension in the ClientHello
[openssl.git] / crypto / init.c
1 /*
2  * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the Apache License 2.0 (the "License").  You may not use
5  * this file except in compliance with the License.  You can obtain a copy
6  * in the file LICENSE in the source distribution or at
7  * https://www.openssl.org/source/license.html
8  */
9
10 #include "e_os.h"
11 #include "internal/cryptlib_int.h"
12 #include <openssl/err.h>
13 #include "internal/rand_int.h"
14 #include "internal/bio.h"
15 #include <openssl/evp.h>
16 #include "internal/evp_int.h"
17 #include "internal/conf.h"
18 #include "internal/async.h"
19 #include "internal/engine.h"
20 #include "internal/comp.h"
21 #include "internal/err.h"
22 #include "internal/err_int.h"
23 #include "internal/objects.h"
24 #include <stdlib.h>
25 #include <assert.h>
26 #include "internal/thread_once.h"
27 #include "internal/dso_conf.h"
28 #include "internal/dso.h"
29 #include "internal/store.h"
30
31 static int stopped = 0;
32
33 /*
34  * Since per-thread-specific-data destructors are not universally
35  * available, i.e. not on Windows, only below CRYPTO_THREAD_LOCAL key
36  * is assumed to have destructor associated. And then an effort is made
37  * to call this single destructor on non-pthread platform[s].
38  *
39  * Initial value is "impossible". It is used as guard value to shortcut
40  * destructor for threads terminating before libcrypto is initialized or
41  * after it's de-initialized. Access to the key doesn't have to be
42  * serialized for the said threads, because they didn't use libcrypto
43  * and it doesn't matter if they pick "impossible" or derefernce real
44  * key value and pull NULL past initialization in the first thread that
45  * intends to use libcrypto.
46  */
47 static union {
48     long sane;
49     CRYPTO_THREAD_LOCAL value;
50 } destructor_key = { -1 };
51
52 static void ossl_init_thread_stop(struct thread_local_inits_st *locals);
53
54 static void ossl_init_thread_destructor(void *local)
55 {
56     ossl_init_thread_stop((struct thread_local_inits_st *)local);
57 }
58
59 static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
60 {
61     struct thread_local_inits_st *local =
62         CRYPTO_THREAD_get_local(&destructor_key.value);
63
64     if (alloc) {
65         if (local == NULL
66             && (local = OPENSSL_zalloc(sizeof(*local))) != NULL
67             && !CRYPTO_THREAD_set_local(&destructor_key.value, local)) {
68             OPENSSL_free(local);
69             return NULL;
70         }
71     } else {
72         CRYPTO_THREAD_set_local(&destructor_key.value, NULL);
73     }
74
75     return local;
76 }
77
78 typedef struct ossl_init_stop_st OPENSSL_INIT_STOP;
79 struct ossl_init_stop_st {
80     void (*handler)(void);
81     OPENSSL_INIT_STOP *next;
82 };
83
84 static OPENSSL_INIT_STOP *stop_handlers = NULL;
85 static CRYPTO_RWLOCK *init_lock = NULL;
86
87 static CRYPTO_ONCE base = CRYPTO_ONCE_STATIC_INIT;
88 static int base_inited = 0;
89 DEFINE_RUN_ONCE_STATIC(ossl_init_base)
90 {
91     CRYPTO_THREAD_LOCAL key;
92
93 #ifdef OPENSSL_INIT_DEBUG
94     fprintf(stderr, "OPENSSL_INIT: ossl_init_base: Setting up stop handlers\n");
95 #endif
96 #ifndef OPENSSL_NO_CRYPTO_MDEBUG
97     ossl_malloc_setup_failures();
98 #endif
99     if (!CRYPTO_THREAD_init_local(&key, ossl_init_thread_destructor))
100         return 0;
101     if ((init_lock = CRYPTO_THREAD_lock_new()) == NULL)
102         goto err;
103     OPENSSL_cpuid_setup();
104
105     destructor_key.value = key;
106     base_inited = 1;
107     return 1;
108
109 err:
110 #ifdef OPENSSL_INIT_DEBUG
111     fprintf(stderr, "OPENSSL_INIT: ossl_init_base not ok!\n");
112 #endif
113     CRYPTO_THREAD_lock_free(init_lock);
114     init_lock = NULL;
115
116     CRYPTO_THREAD_cleanup_local(&key);
117     return 0;
118 }
119
120 static CRYPTO_ONCE register_atexit = CRYPTO_ONCE_STATIC_INIT;
121 #if !defined(OPENSSL_SYS_UEFI) && defined(_WIN32)
122 static int win32atexit(void)
123 {
124     OPENSSL_cleanup();
125     return 0;
126 }
127 #endif
128
129 DEFINE_RUN_ONCE_STATIC(ossl_init_register_atexit)
130 {
131 #ifdef OPENSSL_INIT_DEBUG
132     fprintf(stderr, "OPENSSL_INIT: ossl_init_register_atexit()\n");
133 #endif
134 #ifndef OPENSSL_SYS_UEFI
135 # ifdef _WIN32
136     /* We use _onexit() in preference because it gets called on DLL unload */
137     if (_onexit(win32atexit) == NULL)
138         return 0;
139 # else
140     if (atexit(OPENSSL_cleanup) != 0)
141         return 0;
142 # endif
143 #endif
144
145     return 1;
146 }
147
148 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_register_atexit,
149                            ossl_init_register_atexit)
150 {
151 #ifdef OPENSSL_INIT_DEBUG
152     fprintf(stderr, "OPENSSL_INIT: ossl_init_no_register_atexit ok!\n");
153 #endif
154     /* Do nothing in this case */
155     return 1;
156 }
157
158 static CRYPTO_ONCE load_crypto_nodelete = CRYPTO_ONCE_STATIC_INIT;
159 DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_nodelete)
160 {
161 #ifdef OPENSSL_INIT_DEBUG
162     fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_nodelete()\n");
163 #endif
164 #if !defined(OPENSSL_NO_DSO) \
165     && !defined(OPENSSL_USE_NODELETE) \
166     && !defined(OPENSSL_NO_PINSHARED)
167 # ifdef DSO_WIN32
168     {
169         HMODULE handle = NULL;
170         BOOL ret;
171
172         /* We don't use the DSO route for WIN32 because there is a better way */
173         ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
174                                 | GET_MODULE_HANDLE_EX_FLAG_PIN,
175                                 (void *)&base_inited, &handle);
176
177 #  ifdef OPENSSL_INIT_DEBUG
178         fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n",
179                 (ret == TRUE ? "No!" : "Yes."));
180 #  endif
181         return (ret == TRUE) ? 1 : 0;
182     }
183 # else
184     /*
185      * Deliberately leak a reference to ourselves. This will force the library
186      * to remain loaded until the atexit() handler is run at process exit.
187      */
188     {
189         DSO *dso;
190         void *err;
191
192         if (!err_shelve_state(&err))
193             return 0;
194
195         dso = DSO_dsobyaddr(&base_inited, DSO_FLAG_NO_UNLOAD_ON_FREE);
196 #  ifdef OPENSSL_INIT_DEBUG
197         fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n",
198                 (dso == NULL ? "No!" : "Yes."));
199         /*
200          * In case of No!, it is uncertain our exit()-handlers can still be
201          * called. After dlclose() the whole library might have been unloaded
202          * already.
203          */
204 #  endif
205         DSO_free(dso);
206         err_unshelve_state(err);
207     }
208 # endif
209 #endif
210
211     return 1;
212 }
213
214 static CRYPTO_ONCE load_crypto_strings = CRYPTO_ONCE_STATIC_INIT;
215 static int load_crypto_strings_inited = 0;
216 DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_strings)
217 {
218     int ret = 1;
219     /*
220      * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
221      * pulling in all the error strings during static linking
222      */
223 #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
224 # ifdef OPENSSL_INIT_DEBUG
225     fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_strings: "
226                     "err_load_crypto_strings_int()\n");
227 # endif
228     ret = err_load_crypto_strings_int();
229     load_crypto_strings_inited = 1;
230 #endif
231     return ret;
232 }
233
234 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_load_crypto_strings,
235                            ossl_init_load_crypto_strings)
236 {
237     /* Do nothing in this case */
238     return 1;
239 }
240
241 static CRYPTO_ONCE add_all_ciphers = CRYPTO_ONCE_STATIC_INIT;
242 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_ciphers)
243 {
244     /*
245      * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
246      * pulling in all the ciphers during static linking
247      */
248 #ifndef OPENSSL_NO_AUTOALGINIT
249 # ifdef OPENSSL_INIT_DEBUG
250     fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_ciphers: "
251                     "openssl_add_all_ciphers_int()\n");
252 # endif
253     openssl_add_all_ciphers_int();
254 #endif
255     return 1;
256 }
257
258 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_ciphers,
259                            ossl_init_add_all_ciphers)
260 {
261     /* Do nothing */
262     return 1;
263 }
264
265 static CRYPTO_ONCE add_all_digests = CRYPTO_ONCE_STATIC_INIT;
266 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_digests)
267 {
268     /*
269      * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
270      * pulling in all the ciphers during static linking
271      */
272 #ifndef OPENSSL_NO_AUTOALGINIT
273 # ifdef OPENSSL_INIT_DEBUG
274     fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_digests: "
275                     "openssl_add_all_digests()\n");
276 # endif
277     openssl_add_all_digests_int();
278 #endif
279     return 1;
280 }
281
282 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_digests,
283                            ossl_init_add_all_digests)
284 {
285     /* Do nothing */
286     return 1;
287 }
288
289 static CRYPTO_ONCE add_all_macs = CRYPTO_ONCE_STATIC_INIT;
290 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_macs)
291 {
292     /*
293      * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
294      * pulling in all the macs during static linking
295      */
296 #ifndef OPENSSL_NO_AUTOALGINIT
297 # ifdef OPENSSL_INIT_DEBUG
298     fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_macs: "
299                     "openssl_add_all_macs_int()\n");
300 # endif
301     openssl_add_all_macs_int();
302 #endif
303     return 1;
304 }
305
306 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_macs, ossl_init_add_all_macs)
307 {
308     /* Do nothing */
309     return 1;
310 }
311
312 static CRYPTO_ONCE config = CRYPTO_ONCE_STATIC_INIT;
313 static int config_inited = 0;
314 static const char *appname;
315 DEFINE_RUN_ONCE_STATIC(ossl_init_config)
316 {
317 #ifdef OPENSSL_INIT_DEBUG
318     fprintf(stderr,
319             "OPENSSL_INIT: ossl_init_config: openssl_config(%s)\n",
320             appname == NULL ? "NULL" : appname);
321 #endif
322     openssl_config_int(appname);
323     config_inited = 1;
324     return 1;
325 }
326 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_config, ossl_init_config)
327 {
328 #ifdef OPENSSL_INIT_DEBUG
329     fprintf(stderr,
330             "OPENSSL_INIT: ossl_init_config: openssl_no_config_int()\n");
331 #endif
332     openssl_no_config_int();
333     config_inited = 1;
334     return 1;
335 }
336
337 static CRYPTO_ONCE async = CRYPTO_ONCE_STATIC_INIT;
338 static int async_inited = 0;
339 DEFINE_RUN_ONCE_STATIC(ossl_init_async)
340 {
341 #ifdef OPENSSL_INIT_DEBUG
342     fprintf(stderr, "OPENSSL_INIT: ossl_init_async: async_init()\n");
343 #endif
344     if (!async_init())
345         return 0;
346     async_inited = 1;
347     return 1;
348 }
349
350 #ifndef OPENSSL_NO_ENGINE
351 static CRYPTO_ONCE engine_openssl = CRYPTO_ONCE_STATIC_INIT;
352 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_openssl)
353 {
354 # ifdef OPENSSL_INIT_DEBUG
355     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_openssl: "
356                     "engine_load_openssl_int()\n");
357 # endif
358     engine_load_openssl_int();
359     return 1;
360 }
361 # ifndef OPENSSL_NO_DEVCRYPTOENG
362 static CRYPTO_ONCE engine_devcrypto = CRYPTO_ONCE_STATIC_INIT;
363 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_devcrypto)
364 {
365 #  ifdef OPENSSL_INIT_DEBUG
366     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_devcrypto: "
367                     "engine_load_devcrypto_int()\n");
368 #  endif
369     engine_load_devcrypto_int();
370     return 1;
371 }
372 # endif
373
374 # ifndef OPENSSL_NO_RDRAND
375 static CRYPTO_ONCE engine_rdrand = CRYPTO_ONCE_STATIC_INIT;
376 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_rdrand)
377 {
378 #  ifdef OPENSSL_INIT_DEBUG
379     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_rdrand: "
380                     "engine_load_rdrand_int()\n");
381 #  endif
382     engine_load_rdrand_int();
383     return 1;
384 }
385 # endif
386 static CRYPTO_ONCE engine_dynamic = CRYPTO_ONCE_STATIC_INIT;
387 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_dynamic)
388 {
389 # ifdef OPENSSL_INIT_DEBUG
390     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dynamic: "
391                     "engine_load_dynamic_int()\n");
392 # endif
393     engine_load_dynamic_int();
394     return 1;
395 }
396 # ifndef OPENSSL_NO_STATIC_ENGINE
397 #  if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
398 static CRYPTO_ONCE engine_padlock = CRYPTO_ONCE_STATIC_INIT;
399 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_padlock)
400 {
401 #   ifdef OPENSSL_INIT_DEBUG
402     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_padlock: "
403                     "engine_load_padlock_int()\n");
404 #   endif
405     engine_load_padlock_int();
406     return 1;
407 }
408 #  endif
409 #  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
410 static CRYPTO_ONCE engine_capi = CRYPTO_ONCE_STATIC_INIT;
411 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_capi)
412 {
413 #   ifdef OPENSSL_INIT_DEBUG
414     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_capi: "
415                     "engine_load_capi_int()\n");
416 #   endif
417     engine_load_capi_int();
418     return 1;
419 }
420 #  endif
421 #  if !defined(OPENSSL_NO_AFALGENG)
422 static CRYPTO_ONCE engine_afalg = CRYPTO_ONCE_STATIC_INIT;
423 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_afalg)
424 {
425 #   ifdef OPENSSL_INIT_DEBUG
426     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_afalg: "
427                     "engine_load_afalg_int()\n");
428 #   endif
429     engine_load_afalg_int();
430     return 1;
431 }
432 #  endif
433 # endif
434 #endif
435
436 #ifndef OPENSSL_NO_COMP
437 static CRYPTO_ONCE zlib = CRYPTO_ONCE_STATIC_INIT;
438
439 static int zlib_inited = 0;
440 DEFINE_RUN_ONCE_STATIC(ossl_init_zlib)
441 {
442     /* Do nothing - we need to know about this for the later cleanup */
443     zlib_inited = 1;
444     return 1;
445 }
446 #endif
447
448 static void ossl_init_thread_stop(struct thread_local_inits_st *locals)
449 {
450     /* Can't do much about this */
451     if (locals == NULL)
452         return;
453
454     if (locals->async) {
455 #ifdef OPENSSL_INIT_DEBUG
456         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
457                         "async_delete_thread_state()\n");
458 #endif
459         async_delete_thread_state();
460     }
461
462     if (locals->err_state) {
463 #ifdef OPENSSL_INIT_DEBUG
464         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
465                         "err_delete_thread_state()\n");
466 #endif
467         err_delete_thread_state();
468     }
469
470     if (locals->rand) {
471 #ifdef OPENSSL_INIT_DEBUG
472         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
473                         "drbg_delete_thread_state()\n");
474 #endif
475         drbg_delete_thread_state();
476     }
477
478     OPENSSL_free(locals);
479 }
480
481 void OPENSSL_thread_stop(void)
482 {
483     if (destructor_key.sane != -1)
484         ossl_init_thread_stop(ossl_init_get_thread_local(0));
485 }
486
487 int ossl_init_thread_start(uint64_t opts)
488 {
489     struct thread_local_inits_st *locals;
490
491     if (!OPENSSL_init_crypto(0, NULL))
492         return 0;
493
494     locals = ossl_init_get_thread_local(1);
495
496     if (locals == NULL)
497         return 0;
498
499     if (opts & OPENSSL_INIT_THREAD_ASYNC) {
500 #ifdef OPENSSL_INIT_DEBUG
501         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
502                         "marking thread for async\n");
503 #endif
504         locals->async = 1;
505     }
506
507     if (opts & OPENSSL_INIT_THREAD_ERR_STATE) {
508 #ifdef OPENSSL_INIT_DEBUG
509         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
510                         "marking thread for err_state\n");
511 #endif
512         locals->err_state = 1;
513     }
514
515     if (opts & OPENSSL_INIT_THREAD_RAND) {
516 #ifdef OPENSSL_INIT_DEBUG
517         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
518                         "marking thread for rand\n");
519 #endif
520         locals->rand = 1;
521     }
522
523     return 1;
524 }
525
526 void OPENSSL_cleanup(void)
527 {
528     OPENSSL_INIT_STOP *currhandler, *lasthandler;
529     CRYPTO_THREAD_LOCAL key;
530
531     /* If we've not been inited then no need to deinit */
532     if (!base_inited)
533         return;
534
535     /* Might be explicitly called and also by atexit */
536     if (stopped)
537         return;
538     stopped = 1;
539
540     /*
541      * Thread stop may not get automatically called by the thread library for
542      * the very last thread in some situations, so call it directly.
543      */
544     ossl_init_thread_stop(ossl_init_get_thread_local(0));
545
546     currhandler = stop_handlers;
547     while (currhandler != NULL) {
548         currhandler->handler();
549         lasthandler = currhandler;
550         currhandler = currhandler->next;
551         OPENSSL_free(lasthandler);
552     }
553     stop_handlers = NULL;
554
555     CRYPTO_THREAD_lock_free(init_lock);
556     init_lock = NULL;
557
558     /*
559      * We assume we are single-threaded for this function, i.e. no race
560      * conditions for the various "*_inited" vars below.
561      */
562
563 #ifndef OPENSSL_NO_COMP
564     if (zlib_inited) {
565 #ifdef OPENSSL_INIT_DEBUG
566         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
567                         "comp_zlib_cleanup_int()\n");
568 #endif
569         comp_zlib_cleanup_int();
570     }
571 #endif
572
573     if (async_inited) {
574 # ifdef OPENSSL_INIT_DEBUG
575         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
576                         "async_deinit()\n");
577 # endif
578         async_deinit();
579     }
580
581     if (load_crypto_strings_inited) {
582 #ifdef OPENSSL_INIT_DEBUG
583         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
584                         "err_free_strings_int()\n");
585 #endif
586         err_free_strings_int();
587     }
588
589     key = destructor_key.value;
590     destructor_key.sane = -1;
591     CRYPTO_THREAD_cleanup_local(&key);
592
593 #ifdef OPENSSL_INIT_DEBUG
594     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
595                     "rand_cleanup_int()\n");
596     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
597                     "conf_modules_free_int()\n");
598 #ifndef OPENSSL_NO_ENGINE
599     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
600                     "engine_cleanup_int()\n");
601 #endif
602     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
603                     "crypto_cleanup_all_ex_data_int()\n");
604     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
605                     "bio_sock_cleanup_int()\n");
606     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
607                     "bio_cleanup()\n");
608     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
609                     "evp_cleanup_int()\n");
610     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
611                     "obj_cleanup_int()\n");
612     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
613                     "err_cleanup()\n");
614 #endif
615     /*
616      * Note that cleanup order is important:
617      * - rand_cleanup_int could call an ENGINE's RAND cleanup function so
618      * must be called before engine_cleanup_int()
619      * - ENGINEs use CRYPTO_EX_DATA and therefore, must be cleaned up
620      * before the ex data handlers are wiped in CRYPTO_cleanup_all_ex_data().
621      * - conf_modules_free_int() can end up in ENGINE code so must be called
622      * before engine_cleanup_int()
623      * - ENGINEs and additional EVP algorithms might use added OIDs names so
624      * obj_cleanup_int() must be called last
625      */
626     rand_cleanup_int();
627     rand_drbg_cleanup_int();
628     conf_modules_free_int();
629 #ifndef OPENSSL_NO_ENGINE
630     engine_cleanup_int();
631 #endif
632     ossl_store_cleanup_int();
633     crypto_cleanup_all_ex_data_int();
634     bio_cleanup();
635     evp_cleanup_int();
636     obj_cleanup_int();
637     err_cleanup();
638
639     CRYPTO_secure_malloc_done();
640
641     base_inited = 0;
642 }
643
644 /*
645  * If this function is called with a non NULL settings value then it must be
646  * called prior to any threads making calls to any OpenSSL functions,
647  * i.e. passing a non-null settings value is assumed to be single-threaded.
648  */
649 int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
650 {
651     if (stopped) {
652         if (!(opts & OPENSSL_INIT_BASE_ONLY))
653             CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
654         return 0;
655     }
656
657     if (!RUN_ONCE(&base, ossl_init_base))
658         return 0;
659
660     if ((opts & OPENSSL_INIT_NO_ATEXIT) != 0) {
661         if (!RUN_ONCE_ALT(&register_atexit, ossl_init_no_register_atexit,
662                           ossl_init_register_atexit))
663             return 0;
664     } else if (!RUN_ONCE(&register_atexit, ossl_init_register_atexit)) {
665         return 0;
666     }
667
668     if (!(opts & OPENSSL_INIT_BASE_ONLY)
669             && !RUN_ONCE(&load_crypto_nodelete,
670                          ossl_init_load_crypto_nodelete))
671         return 0;
672
673     if ((opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
674             && !RUN_ONCE_ALT(&load_crypto_strings,
675                              ossl_init_no_load_crypto_strings,
676                              ossl_init_load_crypto_strings))
677         return 0;
678
679     if ((opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
680             && !RUN_ONCE(&load_crypto_strings, ossl_init_load_crypto_strings))
681         return 0;
682
683     if ((opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
684             && !RUN_ONCE_ALT(&add_all_ciphers, ossl_init_no_add_all_ciphers,
685                              ossl_init_add_all_ciphers))
686         return 0;
687
688     if ((opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
689             && !RUN_ONCE(&add_all_ciphers, ossl_init_add_all_ciphers))
690         return 0;
691
692     if ((opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
693             && !RUN_ONCE_ALT(&add_all_digests, ossl_init_no_add_all_digests,
694                              ossl_init_add_all_digests))
695         return 0;
696
697     if ((opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
698             && !RUN_ONCE(&add_all_digests, ossl_init_add_all_digests))
699         return 0;
700
701     if ((opts & OPENSSL_INIT_NO_ADD_ALL_MACS)
702             && !RUN_ONCE_ALT(&add_all_macs, ossl_init_no_add_all_macs,
703                              ossl_init_add_all_macs))
704         return 0;
705
706     if ((opts & OPENSSL_INIT_ADD_ALL_MACS)
707             && !RUN_ONCE(&add_all_macs, ossl_init_add_all_macs))
708         return 0;
709
710     if ((opts & OPENSSL_INIT_ATFORK)
711             && !openssl_init_fork_handlers())
712         return 0;
713
714     if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG)
715             && !RUN_ONCE_ALT(&config, ossl_init_no_config, ossl_init_config))
716         return 0;
717
718     if (opts & OPENSSL_INIT_LOAD_CONFIG) {
719         int ret;
720         CRYPTO_THREAD_write_lock(init_lock);
721         appname = (settings == NULL) ? NULL : settings->appname;
722         ret = RUN_ONCE(&config, ossl_init_config);
723         CRYPTO_THREAD_unlock(init_lock);
724         if (!ret)
725             return 0;
726     }
727
728     if ((opts & OPENSSL_INIT_ASYNC)
729             && !RUN_ONCE(&async, ossl_init_async))
730         return 0;
731
732 #ifndef OPENSSL_NO_ENGINE
733     if ((opts & OPENSSL_INIT_ENGINE_OPENSSL)
734             && !RUN_ONCE(&engine_openssl, ossl_init_engine_openssl))
735         return 0;
736 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_DEVCRYPTOENG)
737     if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV)
738             && !RUN_ONCE(&engine_devcrypto, ossl_init_engine_devcrypto))
739         return 0;
740 # endif
741 # ifndef OPENSSL_NO_RDRAND
742     if ((opts & OPENSSL_INIT_ENGINE_RDRAND)
743             && !RUN_ONCE(&engine_rdrand, ossl_init_engine_rdrand))
744         return 0;
745 # endif
746     if ((opts & OPENSSL_INIT_ENGINE_DYNAMIC)
747             && !RUN_ONCE(&engine_dynamic, ossl_init_engine_dynamic))
748         return 0;
749 # ifndef OPENSSL_NO_STATIC_ENGINE
750 #  if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
751     if ((opts & OPENSSL_INIT_ENGINE_PADLOCK)
752             && !RUN_ONCE(&engine_padlock, ossl_init_engine_padlock))
753         return 0;
754 #  endif
755 #  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
756     if ((opts & OPENSSL_INIT_ENGINE_CAPI)
757             && !RUN_ONCE(&engine_capi, ossl_init_engine_capi))
758         return 0;
759 #  endif
760 #  if !defined(OPENSSL_NO_AFALGENG)
761     if ((opts & OPENSSL_INIT_ENGINE_AFALG)
762             && !RUN_ONCE(&engine_afalg, ossl_init_engine_afalg))
763         return 0;
764 #  endif
765 # endif
766     if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN
767                 | OPENSSL_INIT_ENGINE_OPENSSL
768                 | OPENSSL_INIT_ENGINE_AFALG)) {
769         ENGINE_register_all_complete();
770     }
771 #endif
772
773 #ifndef OPENSSL_NO_COMP
774     if ((opts & OPENSSL_INIT_ZLIB)
775             && !RUN_ONCE(&zlib, ossl_init_zlib))
776         return 0;
777 #endif
778
779     return 1;
780 }
781
782 int OPENSSL_atexit(void (*handler)(void))
783 {
784     OPENSSL_INIT_STOP *newhand;
785
786 #if !defined(OPENSSL_NO_DSO) \
787     && !defined(OPENSSL_USE_NODELETE)\
788     && !defined(OPENSSL_NO_PINSHARED)
789     {
790         union {
791             void *sym;
792             void (*func)(void);
793         } handlersym;
794
795         handlersym.func = handler;
796 # ifdef DSO_WIN32
797         {
798             HMODULE handle = NULL;
799             BOOL ret;
800
801             /*
802              * We don't use the DSO route for WIN32 because there is a better
803              * way
804              */
805             ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
806                                     | GET_MODULE_HANDLE_EX_FLAG_PIN,
807                                     handlersym.sym, &handle);
808
809             if (!ret)
810                 return 0;
811         }
812 # else
813         /*
814          * Deliberately leak a reference to the handler. This will force the
815          * library/code containing the handler to remain loaded until we run the
816          * atexit handler. If -znodelete has been used then this is
817          * unnecessary.
818          */
819         {
820             DSO *dso = NULL;
821
822             ERR_set_mark();
823             dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE);
824 #  ifdef OPENSSL_INIT_DEBUG
825             fprintf(stderr,
826                     "OPENSSL_INIT: OPENSSL_atexit: obtained DSO reference? %s\n",
827                     (dso == NULL ? "No!" : "Yes."));
828             /* See same code above in ossl_init_base() for an explanation. */
829 #  endif
830             DSO_free(dso);
831             ERR_pop_to_mark();
832         }
833 # endif
834     }
835 #endif
836
837     if ((newhand = OPENSSL_malloc(sizeof(*newhand))) == NULL) {
838         CRYPTOerr(CRYPTO_F_OPENSSL_ATEXIT, ERR_R_MALLOC_FAILURE);
839         return 0;
840     }
841
842     newhand->handler = handler;
843     newhand->next = stop_handlers;
844     stop_handlers = newhand;
845
846     return 1;
847 }
848
849 #ifdef OPENSSL_SYS_UNIX
850 /*
851  * The following three functions are for OpenSSL developers.  This is
852  * where we set/reset state across fork (called via pthread_atfork when
853  * it exists, or manually by the application when it doesn't).
854  *
855  * WARNING!  If you put code in either OPENSSL_fork_parent or
856  * OPENSSL_fork_child, you MUST MAKE SURE that they are async-signal-
857  * safe.  See this link, for example:
858  *      http://man7.org/linux/man-pages/man7/signal-safety.7.html
859  */
860
861 void OPENSSL_fork_prepare(void)
862 {
863 }
864
865 void OPENSSL_fork_parent(void)
866 {
867 }
868
869 void OPENSSL_fork_child(void)
870 {
871     rand_fork();
872 }
873 #endif