crypto/init.c

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