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 "crypto/cryptlib.h" |
12 | #include <openssl/err.h> |
13 | #include "crypto/rand.h" |
14 | #include "internal/bio.h" |
15 | #include <openssl/evp.h> |
16 | #include "crypto/evp.h" |
17 | #include "internal/conf.h" |
18 | #include "crypto/async.h" |
19 | #include "crypto/engine.h" |
20 | #include "internal/comp.h" |
21 | #include "internal/err.h" |
22 | #include "crypto/err.h" |
23 | #include "crypto/objects.h" |
24 | #include <stdlib.h> |
25 | #include <assert.h> |
26 | #include "internal/thread_once.h" |
27 | #include "crypto/dso_conf.h" |
28 | #include "internal/dso.h" |
29 | #include "crypto/store.h" |
30 | #include <openssl/cmp_util.h> /* for OSSL_CMP_log_close() */ |
31 | #include <openssl/trace.h> |
32 | |
33 | static int stopped = 0; |
34 | |
35 | typedef struct ossl_init_stop_st OPENSSL_INIT_STOP; |
36 | struct ossl_init_stop_st { |
37 | void (*handler)(void); |
38 | OPENSSL_INIT_STOP *next; |
39 | }; |
40 | |
41 | static OPENSSL_INIT_STOP *stop_handlers = NULL; |
42 | static CRYPTO_RWLOCK *init_lock = NULL; |
43 | |
44 | static CRYPTO_ONCE base = CRYPTO_ONCE_STATIC_INIT; |
45 | static int base_inited = 0; |
46 | DEFINE_RUN_ONCE_STATIC(ossl_init_base) |
47 | { |
48 | /* no need to init trace */ |
49 | |
50 | OSSL_TRACE(INIT, "ossl_init_base: setting up stop handlers\n" ); |
51 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG |
52 | ossl_malloc_setup_failures(); |
53 | #endif |
54 | |
55 | if ((init_lock = CRYPTO_THREAD_lock_new()) == NULL) |
56 | goto err; |
57 | OPENSSL_cpuid_setup(); |
58 | |
59 | if (!ossl_init_thread()) |
60 | return 0; |
61 | |
62 | base_inited = 1; |
63 | return 1; |
64 | |
65 | err: |
66 | OSSL_TRACE(INIT, "ossl_init_base failed!\n" ); |
67 | CRYPTO_THREAD_lock_free(init_lock); |
68 | init_lock = NULL; |
69 | |
70 | return 0; |
71 | } |
72 | |
73 | static CRYPTO_ONCE register_atexit = CRYPTO_ONCE_STATIC_INIT; |
74 | #if !defined(OPENSSL_SYS_UEFI) && defined(_WIN32) |
75 | static int win32atexit(void) |
76 | { |
77 | OPENSSL_cleanup(); |
78 | return 0; |
79 | } |
80 | #endif |
81 | |
82 | DEFINE_RUN_ONCE_STATIC(ossl_init_register_atexit) |
83 | { |
84 | #ifdef OPENSSL_INIT_DEBUG |
85 | fprintf(stderr, "OPENSSL_INIT: ossl_init_register_atexit()\n" ); |
86 | #endif |
87 | #ifndef OPENSSL_SYS_UEFI |
88 | # ifdef _WIN32 |
89 | /* We use _onexit() in preference because it gets called on DLL unload */ |
90 | if (_onexit(win32atexit) == NULL) |
91 | return 0; |
92 | # else |
93 | if (atexit(OPENSSL_cleanup) != 0) |
94 | return 0; |
95 | # endif |
96 | #endif |
97 | |
98 | return 1; |
99 | } |
100 | |
101 | DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_register_atexit, |
102 | ossl_init_register_atexit) |
103 | { |
104 | #ifdef OPENSSL_INIT_DEBUG |
105 | fprintf(stderr, "OPENSSL_INIT: ossl_init_no_register_atexit ok!\n" ); |
106 | #endif |
107 | /* Do nothing in this case */ |
108 | return 1; |
109 | } |
110 | |
111 | static CRYPTO_ONCE load_crypto_nodelete = CRYPTO_ONCE_STATIC_INIT; |
112 | DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_nodelete) |
113 | { |
114 | OSSL_TRACE(INIT, "ossl_init_load_crypto_nodelete()\n" ); |
115 | |
116 | #if !defined(OPENSSL_USE_NODELETE) \ |
117 | && !defined(OPENSSL_NO_PINSHARED) |
118 | # if defined(DSO_WIN32) && !defined(_WIN32_WCE) |
119 | { |
120 | HMODULE handle = NULL; |
121 | BOOL ret; |
122 | |
123 | /* We don't use the DSO route for WIN32 because there is a better way */ |
124 | ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
125 | | GET_MODULE_HANDLE_EX_FLAG_PIN, |
126 | (void *)&base_inited, &handle); |
127 | |
128 | OSSL_TRACE1(INIT, |
129 | "ossl_init_load_crypto_nodelete: " |
130 | "obtained DSO reference? %s\n" , |
131 | (ret == TRUE ? "No!" : "Yes." )); |
132 | return (ret == TRUE) ? 1 : 0; |
133 | } |
134 | # elif !defined(DSO_NONE) |
135 | /* |
136 | * Deliberately leak a reference to ourselves. This will force the library |
137 | * to remain loaded until the atexit() handler is run at process exit. |
138 | */ |
139 | { |
140 | DSO *dso; |
141 | void *err; |
142 | |
143 | if (!err_shelve_state(&err)) |
144 | return 0; |
145 | |
146 | dso = DSO_dsobyaddr(&base_inited, DSO_FLAG_NO_UNLOAD_ON_FREE); |
147 | /* |
148 | * In case of No!, it is uncertain our exit()-handlers can still be |
149 | * called. After dlclose() the whole library might have been unloaded |
150 | * already. |
151 | */ |
152 | OSSL_TRACE1(INIT, "obtained DSO reference? %s\n" , |
153 | (dso == NULL ? "No!" : "Yes." )); |
154 | DSO_free(dso); |
155 | err_unshelve_state(err); |
156 | } |
157 | # endif |
158 | #endif |
159 | |
160 | return 1; |
161 | } |
162 | |
163 | static CRYPTO_ONCE load_crypto_strings = CRYPTO_ONCE_STATIC_INIT; |
164 | static int load_crypto_strings_inited = 0; |
165 | DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_strings) |
166 | { |
167 | int ret = 1; |
168 | /* |
169 | * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time |
170 | * pulling in all the error strings during static linking |
171 | */ |
172 | #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT) |
173 | OSSL_TRACE(INIT, "err_load_crypto_strings_int()\n" ); |
174 | ret = err_load_crypto_strings_int(); |
175 | load_crypto_strings_inited = 1; |
176 | #endif |
177 | return ret; |
178 | } |
179 | |
180 | DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_load_crypto_strings, |
181 | ossl_init_load_crypto_strings) |
182 | { |
183 | /* Do nothing in this case */ |
184 | return 1; |
185 | } |
186 | |
187 | static CRYPTO_ONCE add_all_ciphers = CRYPTO_ONCE_STATIC_INIT; |
188 | DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_ciphers) |
189 | { |
190 | /* |
191 | * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time |
192 | * pulling in all the ciphers during static linking |
193 | */ |
194 | #ifndef OPENSSL_NO_AUTOALGINIT |
195 | OSSL_TRACE(INIT, "openssl_add_all_ciphers_int()\n" ); |
196 | openssl_add_all_ciphers_int(); |
197 | #endif |
198 | return 1; |
199 | } |
200 | |
201 | DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_ciphers, |
202 | ossl_init_add_all_ciphers) |
203 | { |
204 | /* Do nothing */ |
205 | return 1; |
206 | } |
207 | |
208 | static CRYPTO_ONCE add_all_digests = CRYPTO_ONCE_STATIC_INIT; |
209 | DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_digests) |
210 | { |
211 | /* |
212 | * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time |
213 | * pulling in all the ciphers during static linking |
214 | */ |
215 | #ifndef OPENSSL_NO_AUTOALGINIT |
216 | OSSL_TRACE(INIT, "openssl_add_all_digests()\n" ); |
217 | openssl_add_all_digests_int(); |
218 | #endif |
219 | return 1; |
220 | } |
221 | |
222 | DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_digests, |
223 | ossl_init_add_all_digests) |
224 | { |
225 | /* Do nothing */ |
226 | return 1; |
227 | } |
228 | |
229 | static CRYPTO_ONCE config = CRYPTO_ONCE_STATIC_INIT; |
230 | static int config_inited = 0; |
231 | static const OPENSSL_INIT_SETTINGS *conf_settings = NULL; |
232 | DEFINE_RUN_ONCE_STATIC(ossl_init_config) |
233 | { |
234 | int ret = openssl_config_int(conf_settings); |
235 | config_inited = 1; |
236 | return ret; |
237 | } |
238 | DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_config, ossl_init_config) |
239 | { |
240 | OSSL_TRACE(INIT, "openssl_no_config_int()\n" ); |
241 | openssl_no_config_int(); |
242 | config_inited = 1; |
243 | return 1; |
244 | } |
245 | |
246 | static CRYPTO_ONCE async = CRYPTO_ONCE_STATIC_INIT; |
247 | static int async_inited = 0; |
248 | DEFINE_RUN_ONCE_STATIC(ossl_init_async) |
249 | { |
250 | OSSL_TRACE(INIT, "async_init()\n" ); |
251 | if (!async_init()) |
252 | return 0; |
253 | async_inited = 1; |
254 | return 1; |
255 | } |
256 | |
257 | #ifndef OPENSSL_NO_ENGINE |
258 | static CRYPTO_ONCE engine_openssl = CRYPTO_ONCE_STATIC_INIT; |
259 | DEFINE_RUN_ONCE_STATIC(ossl_init_engine_openssl) |
260 | { |
261 | OSSL_TRACE(INIT, "engine_load_openssl_int()\n" ); |
262 | engine_load_openssl_int(); |
263 | return 1; |
264 | } |
265 | # ifndef OPENSSL_NO_RDRAND |
266 | static CRYPTO_ONCE engine_rdrand = CRYPTO_ONCE_STATIC_INIT; |
267 | DEFINE_RUN_ONCE_STATIC(ossl_init_engine_rdrand) |
268 | { |
269 | OSSL_TRACE(INIT, "engine_load_rdrand_int()\n" ); |
270 | engine_load_rdrand_int(); |
271 | return 1; |
272 | } |
273 | # endif |
274 | static CRYPTO_ONCE engine_dynamic = CRYPTO_ONCE_STATIC_INIT; |
275 | DEFINE_RUN_ONCE_STATIC(ossl_init_engine_dynamic) |
276 | { |
277 | OSSL_TRACE(INIT, "engine_load_dynamic_int()\n" ); |
278 | engine_load_dynamic_int(); |
279 | return 1; |
280 | } |
281 | # ifndef OPENSSL_NO_STATIC_ENGINE |
282 | # ifndef OPENSSL_NO_DEVCRYPTOENG |
283 | static CRYPTO_ONCE engine_devcrypto = CRYPTO_ONCE_STATIC_INIT; |
284 | DEFINE_RUN_ONCE_STATIC(ossl_init_engine_devcrypto) |
285 | { |
286 | OSSL_TRACE(INIT, "engine_load_devcrypto_int()\n" ); |
287 | engine_load_devcrypto_int(); |
288 | return 1; |
289 | } |
290 | # endif |
291 | # if !defined(OPENSSL_NO_PADLOCKENG) |
292 | static CRYPTO_ONCE engine_padlock = CRYPTO_ONCE_STATIC_INIT; |
293 | DEFINE_RUN_ONCE_STATIC(ossl_init_engine_padlock) |
294 | { |
295 | OSSL_TRACE(INIT, "engine_load_padlock_int()\n" ); |
296 | engine_load_padlock_int(); |
297 | return 1; |
298 | } |
299 | # endif |
300 | # if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG) |
301 | static CRYPTO_ONCE engine_capi = CRYPTO_ONCE_STATIC_INIT; |
302 | DEFINE_RUN_ONCE_STATIC(ossl_init_engine_capi) |
303 | { |
304 | OSSL_TRACE(INIT, "engine_load_capi_int()\n" ); |
305 | engine_load_capi_int(); |
306 | return 1; |
307 | } |
308 | # endif |
309 | # if !defined(OPENSSL_NO_AFALGENG) |
310 | static CRYPTO_ONCE engine_afalg = CRYPTO_ONCE_STATIC_INIT; |
311 | DEFINE_RUN_ONCE_STATIC(ossl_init_engine_afalg) |
312 | { |
313 | OSSL_TRACE(INIT, "engine_load_afalg_int()\n" ); |
314 | engine_load_afalg_int(); |
315 | return 1; |
316 | } |
317 | # endif |
318 | # endif |
319 | #endif |
320 | |
321 | #ifndef OPENSSL_NO_COMP |
322 | static CRYPTO_ONCE zlib = CRYPTO_ONCE_STATIC_INIT; |
323 | |
324 | static int zlib_inited = 0; |
325 | DEFINE_RUN_ONCE_STATIC(ossl_init_zlib) |
326 | { |
327 | /* Do nothing - we need to know about this for the later cleanup */ |
328 | zlib_inited = 1; |
329 | return 1; |
330 | } |
331 | #endif |
332 | |
333 | void OPENSSL_cleanup(void) |
334 | { |
335 | OPENSSL_INIT_STOP *currhandler, *lasthandler; |
336 | |
337 | /* |
338 | * TODO(3.0): This function needs looking at with a view to moving most/all |
339 | * of this into onfree handlers in OPENSSL_CTX. |
340 | */ |
341 | |
342 | /* If we've not been inited then no need to deinit */ |
343 | if (!base_inited) |
344 | return; |
345 | |
346 | /* Might be explicitly called and also by atexit */ |
347 | if (stopped) |
348 | return; |
349 | stopped = 1; |
350 | |
351 | /* |
352 | * Thread stop may not get automatically called by the thread library for |
353 | * the very last thread in some situations, so call it directly. |
354 | */ |
355 | OPENSSL_thread_stop(); |
356 | |
357 | currhandler = stop_handlers; |
358 | while (currhandler != NULL) { |
359 | currhandler->handler(); |
360 | lasthandler = currhandler; |
361 | currhandler = currhandler->next; |
362 | OPENSSL_free(lasthandler); |
363 | } |
364 | stop_handlers = NULL; |
365 | |
366 | CRYPTO_THREAD_lock_free(init_lock); |
367 | init_lock = NULL; |
368 | |
369 | /* |
370 | * We assume we are single-threaded for this function, i.e. no race |
371 | * conditions for the various "*_inited" vars below. |
372 | */ |
373 | |
374 | #ifndef OPENSSL_NO_COMP |
375 | if (zlib_inited) { |
376 | OSSL_TRACE(INIT, "OPENSSL_cleanup: comp_zlib_cleanup_int()\n" ); |
377 | comp_zlib_cleanup_int(); |
378 | } |
379 | #endif |
380 | |
381 | if (async_inited) { |
382 | OSSL_TRACE(INIT, "OPENSSL_cleanup: async_deinit()\n" ); |
383 | async_deinit(); |
384 | } |
385 | |
386 | if (load_crypto_strings_inited) { |
387 | OSSL_TRACE(INIT, "OPENSSL_cleanup: err_free_strings_int()\n" ); |
388 | err_free_strings_int(); |
389 | } |
390 | |
391 | /* |
392 | * Note that cleanup order is important: |
393 | * - rand_cleanup_int could call an ENGINE's RAND cleanup function so |
394 | * must be called before engine_cleanup_int() |
395 | * - ENGINEs use CRYPTO_EX_DATA and therefore, must be cleaned up |
396 | * before the ex data handlers are wiped during default openssl_ctx deinit. |
397 | * - conf_modules_free_int() can end up in ENGINE code so must be called |
398 | * before engine_cleanup_int() |
399 | * - ENGINEs and additional EVP algorithms might use added OIDs names so |
400 | * obj_cleanup_int() must be called last |
401 | */ |
402 | OSSL_TRACE(INIT, "OPENSSL_cleanup: rand_cleanup_int()\n" ); |
403 | rand_cleanup_int(); |
404 | |
405 | OSSL_TRACE(INIT, "OPENSSL_cleanup: conf_modules_free_int()\n" ); |
406 | conf_modules_free_int(); |
407 | |
408 | #ifndef OPENSSL_NO_ENGINE |
409 | OSSL_TRACE(INIT, "OPENSSL_cleanup: engine_cleanup_int()\n" ); |
410 | engine_cleanup_int(); |
411 | #endif |
412 | OSSL_TRACE(INIT, "OPENSSL_cleanup: ossl_store_cleanup_int()\n" ); |
413 | ossl_store_cleanup_int(); |
414 | |
415 | OSSL_TRACE(INIT, "OPENSSL_cleanup: openssl_ctx_default_deinit()\n" ); |
416 | openssl_ctx_default_deinit(); |
417 | |
418 | ossl_cleanup_thread(); |
419 | |
420 | OSSL_TRACE(INIT, "OPENSSL_cleanup: bio_cleanup()\n" ); |
421 | bio_cleanup(); |
422 | |
423 | OSSL_TRACE(INIT, "OPENSSL_cleanup: evp_cleanup_int()\n" ); |
424 | evp_cleanup_int(); |
425 | |
426 | OSSL_TRACE(INIT, "OPENSSL_cleanup: obj_cleanup_int()\n" ); |
427 | obj_cleanup_int(); |
428 | |
429 | OSSL_TRACE(INIT, "OPENSSL_cleanup: err_int()\n" ); |
430 | err_cleanup(); |
431 | |
432 | OSSL_TRACE(INIT, "OPENSSL_cleanup: CRYPTO_secure_malloc_done()\n" ); |
433 | CRYPTO_secure_malloc_done(); |
434 | |
435 | #ifndef OPENSSL_NO_CMP |
436 | OSSL_TRACE(INIT, "OPENSSL_cleanup: OSSL_CMP_log_close()\n" ); |
437 | OSSL_CMP_log_close(); |
438 | #endif |
439 | |
440 | OSSL_TRACE(INIT, "OPENSSL_cleanup: ossl_trace_cleanup()\n" ); |
441 | ossl_trace_cleanup(); |
442 | |
443 | base_inited = 0; |
444 | } |
445 | |
446 | /* |
447 | * If this function is called with a non NULL settings value then it must be |
448 | * called prior to any threads making calls to any OpenSSL functions, |
449 | * i.e. passing a non-null settings value is assumed to be single-threaded. |
450 | */ |
451 | int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings) |
452 | { |
453 | /* |
454 | * TODO(3.0): This function needs looking at with a view to moving most/all |
455 | * of this into OPENSSL_CTX. |
456 | */ |
457 | |
458 | if (stopped) { |
459 | if (!(opts & OPENSSL_INIT_BASE_ONLY)) |
460 | CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL); |
461 | return 0; |
462 | } |
463 | |
464 | /* |
465 | * When the caller specifies OPENSSL_INIT_BASE_ONLY, that should be the |
466 | * *only* option specified. With that option we return immediately after |
467 | * doing the requested limited initialization. Note that |
468 | * err_shelve_state() called by us via ossl_init_load_crypto_nodelete() |
469 | * re-enters OPENSSL_init_crypto() with OPENSSL_INIT_BASE_ONLY, but with |
470 | * base already initialized this is a harmless NOOP. |
471 | * |
472 | * If we remain the only caller of err_shelve_state() the recursion should |
473 | * perhaps be removed, but if in doubt, it can be left in place. |
474 | */ |
475 | if (!RUN_ONCE(&base, ossl_init_base)) |
476 | return 0; |
477 | |
478 | if (opts & OPENSSL_INIT_BASE_ONLY) |
479 | return 1; |
480 | |
481 | /* |
482 | * Now we don't always set up exit handlers, the INIT_BASE_ONLY calls |
483 | * should not have the side-effect of setting up exit handlers, and |
484 | * therefore, this code block is below the INIT_BASE_ONLY-conditioned early |
485 | * return above. |
486 | */ |
487 | if ((opts & OPENSSL_INIT_NO_ATEXIT) != 0) { |
488 | if (!RUN_ONCE_ALT(®ister_atexit, ossl_init_no_register_atexit, |
489 | ossl_init_register_atexit)) |
490 | return 0; |
491 | } else if (!RUN_ONCE(®ister_atexit, ossl_init_register_atexit)) { |
492 | return 0; |
493 | } |
494 | |
495 | if (!RUN_ONCE(&load_crypto_nodelete, ossl_init_load_crypto_nodelete)) |
496 | return 0; |
497 | |
498 | if ((opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS) |
499 | && !RUN_ONCE_ALT(&load_crypto_strings, |
500 | ossl_init_no_load_crypto_strings, |
501 | ossl_init_load_crypto_strings)) |
502 | return 0; |
503 | |
504 | if ((opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS) |
505 | && !RUN_ONCE(&load_crypto_strings, ossl_init_load_crypto_strings)) |
506 | return 0; |
507 | |
508 | if ((opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS) |
509 | && !RUN_ONCE_ALT(&add_all_ciphers, ossl_init_no_add_all_ciphers, |
510 | ossl_init_add_all_ciphers)) |
511 | return 0; |
512 | |
513 | if ((opts & OPENSSL_INIT_ADD_ALL_CIPHERS) |
514 | && !RUN_ONCE(&add_all_ciphers, ossl_init_add_all_ciphers)) |
515 | return 0; |
516 | |
517 | if ((opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS) |
518 | && !RUN_ONCE_ALT(&add_all_digests, ossl_init_no_add_all_digests, |
519 | ossl_init_add_all_digests)) |
520 | return 0; |
521 | |
522 | if ((opts & OPENSSL_INIT_ADD_ALL_DIGESTS) |
523 | && !RUN_ONCE(&add_all_digests, ossl_init_add_all_digests)) |
524 | return 0; |
525 | |
526 | if ((opts & OPENSSL_INIT_ATFORK) |
527 | && !openssl_init_fork_handlers()) |
528 | return 0; |
529 | |
530 | if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG) |
531 | && !RUN_ONCE_ALT(&config, ossl_init_no_config, ossl_init_config)) |
532 | return 0; |
533 | |
534 | if (opts & OPENSSL_INIT_LOAD_CONFIG) { |
535 | int ret; |
536 | CRYPTO_THREAD_write_lock(init_lock); |
537 | conf_settings = settings; |
538 | ret = RUN_ONCE(&config, ossl_init_config); |
539 | conf_settings = NULL; |
540 | CRYPTO_THREAD_unlock(init_lock); |
541 | if (ret <= 0) |
542 | return 0; |
543 | } |
544 | |
545 | if ((opts & OPENSSL_INIT_ASYNC) |
546 | && !RUN_ONCE(&async, ossl_init_async)) |
547 | return 0; |
548 | |
549 | #ifndef OPENSSL_NO_ENGINE |
550 | if ((opts & OPENSSL_INIT_ENGINE_OPENSSL) |
551 | && !RUN_ONCE(&engine_openssl, ossl_init_engine_openssl)) |
552 | return 0; |
553 | # ifndef OPENSSL_NO_RDRAND |
554 | if ((opts & OPENSSL_INIT_ENGINE_RDRAND) |
555 | && !RUN_ONCE(&engine_rdrand, ossl_init_engine_rdrand)) |
556 | return 0; |
557 | # endif |
558 | if ((opts & OPENSSL_INIT_ENGINE_DYNAMIC) |
559 | && !RUN_ONCE(&engine_dynamic, ossl_init_engine_dynamic)) |
560 | return 0; |
561 | # ifndef OPENSSL_NO_STATIC_ENGINE |
562 | # ifndef OPENSSL_NO_DEVCRYPTOENG |
563 | if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV) |
564 | && !RUN_ONCE(&engine_devcrypto, ossl_init_engine_devcrypto)) |
565 | return 0; |
566 | # endif |
567 | # if !defined(OPENSSL_NO_PADLOCKENG) |
568 | if ((opts & OPENSSL_INIT_ENGINE_PADLOCK) |
569 | && !RUN_ONCE(&engine_padlock, ossl_init_engine_padlock)) |
570 | return 0; |
571 | # endif |
572 | # if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG) |
573 | if ((opts & OPENSSL_INIT_ENGINE_CAPI) |
574 | && !RUN_ONCE(&engine_capi, ossl_init_engine_capi)) |
575 | return 0; |
576 | # endif |
577 | # if !defined(OPENSSL_NO_AFALGENG) |
578 | if ((opts & OPENSSL_INIT_ENGINE_AFALG) |
579 | && !RUN_ONCE(&engine_afalg, ossl_init_engine_afalg)) |
580 | return 0; |
581 | # endif |
582 | # endif |
583 | if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN |
584 | | OPENSSL_INIT_ENGINE_OPENSSL |
585 | | OPENSSL_INIT_ENGINE_AFALG)) { |
586 | ENGINE_register_all_complete(); |
587 | } |
588 | #endif |
589 | |
590 | #ifndef OPENSSL_NO_COMP |
591 | if ((opts & OPENSSL_INIT_ZLIB) |
592 | && !RUN_ONCE(&zlib, ossl_init_zlib)) |
593 | return 0; |
594 | #endif |
595 | |
596 | return 1; |
597 | } |
598 | |
599 | int OPENSSL_atexit(void (*handler)(void)) |
600 | { |
601 | OPENSSL_INIT_STOP *newhand; |
602 | |
603 | #if !defined(OPENSSL_USE_NODELETE)\ |
604 | && !defined(OPENSSL_NO_PINSHARED) |
605 | { |
606 | union { |
607 | void *sym; |
608 | void (*func)(void); |
609 | } handlersym; |
610 | |
611 | handlersym.func = handler; |
612 | # if defined(DSO_WIN32) && !defined(_WIN32_WCE) |
613 | { |
614 | HMODULE handle = NULL; |
615 | BOOL ret; |
616 | |
617 | /* |
618 | * We don't use the DSO route for WIN32 because there is a better |
619 | * way |
620 | */ |
621 | ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
622 | | GET_MODULE_HANDLE_EX_FLAG_PIN, |
623 | handlersym.sym, &handle); |
624 | |
625 | if (!ret) |
626 | return 0; |
627 | } |
628 | # elif !defined(DSO_NONE) |
629 | /* |
630 | * Deliberately leak a reference to the handler. This will force the |
631 | * library/code containing the handler to remain loaded until we run the |
632 | * atexit handler. If -znodelete has been used then this is |
633 | * unnecessary. |
634 | */ |
635 | { |
636 | DSO *dso = NULL; |
637 | |
638 | ERR_set_mark(); |
639 | dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE); |
640 | /* See same code above in ossl_init_base() for an explanation. */ |
641 | OSSL_TRACE1(INIT, |
642 | "atexit: obtained DSO reference? %s\n" , |
643 | (dso == NULL ? "No!" : "Yes." )); |
644 | DSO_free(dso); |
645 | ERR_pop_to_mark(); |
646 | } |
647 | # endif |
648 | } |
649 | #endif |
650 | |
651 | if ((newhand = OPENSSL_malloc(sizeof(*newhand))) == NULL) { |
652 | CRYPTOerr(CRYPTO_F_OPENSSL_ATEXIT, ERR_R_MALLOC_FAILURE); |
653 | return 0; |
654 | } |
655 | |
656 | newhand->handler = handler; |
657 | newhand->next = stop_handlers; |
658 | stop_handlers = newhand; |
659 | |
660 | return 1; |
661 | } |
662 | |
663 | #ifdef OPENSSL_SYS_UNIX |
664 | /* |
665 | * The following three functions are for OpenSSL developers. This is |
666 | * where we set/reset state across fork (called via pthread_atfork when |
667 | * it exists, or manually by the application when it doesn't). |
668 | * |
669 | * WARNING! If you put code in either OPENSSL_fork_parent or |
670 | * OPENSSL_fork_child, you MUST MAKE SURE that they are async-signal- |
671 | * safe. See this link, for example: |
672 | * http://man7.org/linux/man-pages/man7/signal-safety.7.html |
673 | */ |
674 | |
675 | void OPENSSL_fork_prepare(void) |
676 | { |
677 | } |
678 | |
679 | void OPENSSL_fork_parent(void) |
680 | { |
681 | } |
682 | |
683 | void OPENSSL_fork_child(void) |
684 | { |
685 | /* TODO(3.0): Inform all providers about a fork event */ |
686 | } |
687 | #endif |
688 | |