crypto/init.c

   1 /*
   2  * Copyright 2016-2019 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 "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
  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 dereference 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_USE_NODELETE) \
 165     && !defined(OPENSSL_NO_PINSHARED)
 166 # if defined(DSO_WIN32) && !defined(_WIN32_WCE)
 167     {
 168         HMODULE handle = NULL;
 169         BOOL ret;
 170
 171         /* We don't use the DSO route for WIN32 because there is a better way */
 172         ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
 173                                 | GET_MODULE_HANDLE_EX_FLAG_PIN,
 174                                 (void *)&base_inited, &handle);
 175
 176 #  ifdef OPENSSL_INIT_DEBUG
 177         fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n",
 178                 (ret == TRUE ? "No!" : "Yes."));
 179 #  endif
 180         return (ret == TRUE) ? 1 : 0;
 181     }
 182 # elif !defined(DSO_NONE)
 183     /*
 184      * Deliberately leak a reference to ourselves. This will force the library
 185      * to remain loaded until the atexit() handler is run at process exit.
 186      */
 187     {
 188         DSO *dso;
 189         void *err;
 190
 191         if (!err_shelve_state(&err))
 192             return 0;
 193
 194         dso = DSO_dsobyaddr(&base_inited, DSO_FLAG_NO_UNLOAD_ON_FREE);
 195 #  ifdef OPENSSL_INIT_DEBUG
 196         fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n",
 197                 (dso == NULL ? "No!" : "Yes."));
 198         /*
 199          * In case of No!, it is uncertain our exit()-handlers can still be
 200          * called. After dlclose() the whole library might have been unloaded
 201          * already.
 202          */
 203 #  endif
 204         DSO_free(dso);
 205         err_unshelve_state(err);
 206     }
 207 # endif
 208 #endif
 209
 210     return 1;
 211 }
 212
 213 static CRYPTO_ONCE load_crypto_strings = CRYPTO_ONCE_STATIC_INIT;
 214 static int load_crypto_strings_inited = 0;
 215 DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_strings)
 216 {
 217     int ret = 1;
 218     /*
 219      * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
 220      * pulling in all the error strings during static linking
 221      */
 222 #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
 223 # ifdef OPENSSL_INIT_DEBUG
 224     fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_strings: "
 225                     "err_load_crypto_strings_int()\n");
 226 # endif
 227     ret = err_load_crypto_strings_int();
 228     load_crypto_strings_inited = 1;
 229 #endif
 230     return ret;
 231 }
 232
 233 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_load_crypto_strings,
 234                            ossl_init_load_crypto_strings)
 235 {
 236     /* Do nothing in this case */
 237     return 1;
 238 }
 239
 240 static CRYPTO_ONCE add_all_ciphers = CRYPTO_ONCE_STATIC_INIT;
 241 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_ciphers)
 242 {
 243     /*
 244      * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
 245      * pulling in all the ciphers during static linking
 246      */
 247 #ifndef OPENSSL_NO_AUTOALGINIT
 248 # ifdef OPENSSL_INIT_DEBUG
 249     fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_ciphers: "
 250                     "openssl_add_all_ciphers_int()\n");
 251 # endif
 252     openssl_add_all_ciphers_int();
 253 #endif
 254     return 1;
 255 }
 256
 257 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_ciphers,
 258                            ossl_init_add_all_ciphers)
 259 {
 260     /* Do nothing */
 261     return 1;
 262 }
 263
 264 static CRYPTO_ONCE add_all_digests = CRYPTO_ONCE_STATIC_INIT;
 265 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_digests)
 266 {
 267     /*
 268      * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
 269      * pulling in all the ciphers during static linking
 270      */
 271 #ifndef OPENSSL_NO_AUTOALGINIT
 272 # ifdef OPENSSL_INIT_DEBUG
 273     fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_digests: "
 274                     "openssl_add_all_digests()\n");
 275 # endif
 276     openssl_add_all_digests_int();
 277 #endif
 278     return 1;
 279 }
 280
 281 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_digests,
 282                            ossl_init_add_all_digests)
 283 {
 284     /* Do nothing */
 285     return 1;
 286 }
 287
 288 static CRYPTO_ONCE config = CRYPTO_ONCE_STATIC_INIT;
 289 static int config_inited = 0;
 290 static const OPENSSL_INIT_SETTINGS *conf_settings = NULL;
 291 DEFINE_RUN_ONCE_STATIC(ossl_init_config)
 292 {
 293     int ret = openssl_config_int(conf_settings);
 294     config_inited = 1;
 295     return ret;
 296 }
 297 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_config, ossl_init_config)
 298 {
 299 #ifdef OPENSSL_INIT_DEBUG
 300     fprintf(stderr,
 301             "OPENSSL_INIT: ossl_init_config: openssl_no_config_int()\n");
 302 #endif
 303     openssl_no_config_int();
 304     config_inited = 1;
 305     return 1;
 306 }
 307
 308 static CRYPTO_ONCE async = CRYPTO_ONCE_STATIC_INIT;
 309 static int async_inited = 0;
 310 DEFINE_RUN_ONCE_STATIC(ossl_init_async)
 311 {
 312 #ifdef OPENSSL_INIT_DEBUG
 313     fprintf(stderr, "OPENSSL_INIT: ossl_init_async: async_init()\n");
 314 #endif
 315     if (!async_init())
 316         return 0;
 317     async_inited = 1;
 318     return 1;
 319 }
 320
 321 #ifndef OPENSSL_NO_ENGINE
 322 static CRYPTO_ONCE engine_openssl = CRYPTO_ONCE_STATIC_INIT;
 323 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_openssl)
 324 {
 325 # ifdef OPENSSL_INIT_DEBUG
 326     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_openssl: "
 327                     "engine_load_openssl_int()\n");
 328 # endif
 329     engine_load_openssl_int();
 330     return 1;
 331 }
 332 # ifndef OPENSSL_NO_DEVCRYPTOENG
 333 static CRYPTO_ONCE engine_devcrypto = CRYPTO_ONCE_STATIC_INIT;
 334 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_devcrypto)
 335 {
 336 #  ifdef OPENSSL_INIT_DEBUG
 337     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_devcrypto: "
 338                     "engine_load_devcrypto_int()\n");
 339 #  endif
 340     engine_load_devcrypto_int();
 341     return 1;
 342 }
 343 # endif
 344
 345 # ifndef OPENSSL_NO_RDRAND
 346 static CRYPTO_ONCE engine_rdrand = CRYPTO_ONCE_STATIC_INIT;
 347 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_rdrand)
 348 {
 349 #  ifdef OPENSSL_INIT_DEBUG
 350     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_rdrand: "
 351                     "engine_load_rdrand_int()\n");
 352 #  endif
 353     engine_load_rdrand_int();
 354     return 1;
 355 }
 356 # endif
 357 static CRYPTO_ONCE engine_dynamic = CRYPTO_ONCE_STATIC_INIT;
 358 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_dynamic)
 359 {
 360 # ifdef OPENSSL_INIT_DEBUG
 361     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dynamic: "
 362                     "engine_load_dynamic_int()\n");
 363 # endif
 364     engine_load_dynamic_int();
 365     return 1;
 366 }
 367 # ifndef OPENSSL_NO_STATIC_ENGINE
 368 #  if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
 369 static CRYPTO_ONCE engine_padlock = CRYPTO_ONCE_STATIC_INIT;
 370 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_padlock)
 371 {
 372 #   ifdef OPENSSL_INIT_DEBUG
 373     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_padlock: "
 374                     "engine_load_padlock_int()\n");
 375 #   endif
 376     engine_load_padlock_int();
 377     return 1;
 378 }
 379 #  endif
 380 #  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
 381 static CRYPTO_ONCE engine_capi = CRYPTO_ONCE_STATIC_INIT;
 382 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_capi)
 383 {
 384 #   ifdef OPENSSL_INIT_DEBUG
 385     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_capi: "
 386                     "engine_load_capi_int()\n");
 387 #   endif
 388     engine_load_capi_int();
 389     return 1;
 390 }
 391 #  endif
 392 #  if !defined(OPENSSL_NO_AFALGENG)
 393 static CRYPTO_ONCE engine_afalg = CRYPTO_ONCE_STATIC_INIT;
 394 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_afalg)
 395 {
 396 #   ifdef OPENSSL_INIT_DEBUG
 397     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_afalg: "
 398                     "engine_load_afalg_int()\n");
 399 #   endif
 400     engine_load_afalg_int();
 401     return 1;
 402 }
 403 #  endif
 404 # endif
 405 #endif
 406
 407 #ifndef OPENSSL_NO_COMP
 408 static CRYPTO_ONCE zlib = CRYPTO_ONCE_STATIC_INIT;
 409
 410 static int zlib_inited = 0;
 411 DEFINE_RUN_ONCE_STATIC(ossl_init_zlib)
 412 {
 413     /* Do nothing - we need to know about this for the later cleanup */
 414     zlib_inited = 1;
 415     return 1;
 416 }
 417 #endif
 418
 419 static void ossl_init_thread_stop(struct thread_local_inits_st *locals)
 420 {
 421     /* Can't do much about this */
 422     if (locals == NULL)
 423         return;
 424
 425     if (locals->async) {
 426 #ifdef OPENSSL_INIT_DEBUG
 427         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
 428                         "async_delete_thread_state()\n");
 429 #endif
 430         async_delete_thread_state();
 431     }
 432
 433     if (locals->err_state) {
 434 #ifdef OPENSSL_INIT_DEBUG
 435         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
 436                         "err_delete_thread_state()\n");
 437 #endif
 438         err_delete_thread_state();
 439     }
 440
 441     if (locals->rand) {
 442 #ifdef OPENSSL_INIT_DEBUG
 443         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
 444                         "drbg_delete_thread_state()\n");
 445 #endif
 446         drbg_delete_thread_state();
 447     }
 448
 449     OPENSSL_free(locals);
 450 }
 451
 452 void OPENSSL_thread_stop(void)
 453 {
 454     if (destructor_key.sane != -1)
 455         ossl_init_thread_stop(ossl_init_get_thread_local(0));
 456 }
 457
 458 int ossl_init_thread_start(uint64_t opts)
 459 {
 460     struct thread_local_inits_st *locals;
 461
 462     if (!OPENSSL_init_crypto(0, NULL))
 463         return 0;
 464
 465     locals = ossl_init_get_thread_local(1);
 466
 467     if (locals == NULL)
 468         return 0;
 469
 470     if (opts & OPENSSL_INIT_THREAD_ASYNC) {
 471 #ifdef OPENSSL_INIT_DEBUG
 472         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
 473                         "marking thread for async\n");
 474 #endif
 475         locals->async = 1;
 476     }
 477
 478     if (opts & OPENSSL_INIT_THREAD_ERR_STATE) {
 479 #ifdef OPENSSL_INIT_DEBUG
 480         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
 481                         "marking thread for err_state\n");
 482 #endif
 483         locals->err_state = 1;
 484     }
 485
 486     if (opts & OPENSSL_INIT_THREAD_RAND) {
 487 #ifdef OPENSSL_INIT_DEBUG
 488         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
 489                         "marking thread for rand\n");
 490 #endif
 491         locals->rand = 1;
 492     }
 493
 494     return 1;
 495 }
 496
 497 void OPENSSL_cleanup(void)
 498 {
 499     OPENSSL_INIT_STOP *currhandler, *lasthandler;
 500     CRYPTO_THREAD_LOCAL key;
 501
 502     /* If we've not been inited then no need to deinit */
 503     if (!base_inited)
 504         return;
 505
 506     /* Might be explicitly called and also by atexit */
 507     if (stopped)
 508         return;
 509     stopped = 1;
 510
 511     /*
 512      * Thread stop may not get automatically called by the thread library for
 513      * the very last thread in some situations, so call it directly.
 514      */
 515     ossl_init_thread_stop(ossl_init_get_thread_local(0));
 516
 517     currhandler = stop_handlers;
 518     while (currhandler != NULL) {
 519         currhandler->handler();
 520         lasthandler = currhandler;
 521         currhandler = currhandler->next;
 522         OPENSSL_free(lasthandler);
 523     }
 524     stop_handlers = NULL;
 525
 526     CRYPTO_THREAD_lock_free(init_lock);
 527     init_lock = NULL;
 528
 529     /*
 530      * We assume we are single-threaded for this function, i.e. no race
 531      * conditions for the various "*_inited" vars below.
 532      */
 533
 534 #ifndef OPENSSL_NO_COMP
 535     if (zlib_inited) {
 536 #ifdef OPENSSL_INIT_DEBUG
 537         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 538                         "comp_zlib_cleanup_int()\n");
 539 #endif
 540         comp_zlib_cleanup_int();
 541     }
 542 #endif
 543
 544     if (async_inited) {
 545 # ifdef OPENSSL_INIT_DEBUG
 546         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 547                         "async_deinit()\n");
 548 # endif
 549         async_deinit();
 550     }
 551
 552     if (load_crypto_strings_inited) {
 553 #ifdef OPENSSL_INIT_DEBUG
 554         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 555                         "err_free_strings_int()\n");
 556 #endif
 557         err_free_strings_int();
 558     }
 559
 560     key = destructor_key.value;
 561     destructor_key.sane = -1;
 562     CRYPTO_THREAD_cleanup_local(&key);
 563
 564 #ifdef OPENSSL_INIT_DEBUG
 565     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 566                     "rand_cleanup_int()\n");
 567     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 568                     "conf_modules_free_int()\n");
 569 #ifndef OPENSSL_NO_ENGINE
 570     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 571                     "engine_cleanup_int()\n");
 572 #endif
 573     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 574                     "crypto_cleanup_all_ex_data_int()\n");
 575     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 576                     "bio_sock_cleanup_int()\n");
 577     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 578                     "bio_cleanup()\n");
 579     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 580                     "evp_cleanup_int()\n");
 581     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 582                     "obj_cleanup_int()\n");
 583     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 584                     "err_cleanup()\n");
 585 #endif
 586     /*
 587      * Note that cleanup order is important:
 588      * - rand_cleanup_int could call an ENGINE's RAND cleanup function so
 589      * must be called before engine_cleanup_int()
 590      * - ENGINEs use CRYPTO_EX_DATA and therefore, must be cleaned up
 591      * before the ex data handlers are wiped in CRYPTO_cleanup_all_ex_data().
 592      * - conf_modules_free_int() can end up in ENGINE code so must be called
 593      * before engine_cleanup_int()
 594      * - ENGINEs and additional EVP algorithms might use added OIDs names so
 595      * obj_cleanup_int() must be called last
 596      */
 597     rand_cleanup_int();
 598     rand_drbg_cleanup_int();
 599     conf_modules_free_int();
 600 #ifndef OPENSSL_NO_ENGINE
 601     engine_cleanup_int();
 602 #endif
 603     ossl_store_cleanup_int();
 604     crypto_cleanup_all_ex_data_int();
 605     bio_cleanup();
 606     evp_cleanup_int();
 607     obj_cleanup_int();
 608     err_cleanup();
 609
 610     CRYPTO_secure_malloc_done();
 611
 612     base_inited = 0;
 613 }
 614
 615 /*
 616  * If this function is called with a non NULL settings value then it must be
 617  * called prior to any threads making calls to any OpenSSL functions,
 618  * i.e. passing a non-null settings value is assumed to be single-threaded.
 619  */
 620 int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
 621 {
 622     if (stopped) {
 623         if (!(opts & OPENSSL_INIT_BASE_ONLY))
 624             CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
 625         return 0;
 626     }
 627
 628     /*
 629      * When the caller specifies OPENSSL_INIT_BASE_ONLY, that should be the
 630      * *only* option specified.  With that option we return immediately after
 631      * doing the requested limited initialization.  Note that
 632      * err_shelve_state() called by us via ossl_init_load_crypto_nodelete()
 633      * re-enters OPENSSL_init_crypto() with OPENSSL_INIT_BASE_ONLY, but with
 634      * base already initialized this is a harmless NOOP.
 635      *
 636      * If we remain the only caller of err_shelve_state() the recursion should
 637      * perhaps be removed, but if in doubt, it can be left in place.
 638      */
 639     if (!RUN_ONCE(&base, ossl_init_base))
 640         return 0;
 641     if (opts & OPENSSL_INIT_BASE_ONLY)
 642         return 1;
 643
 644     /*
 645      * Now we don't always set up exit handlers, the INIT_BASE_ONLY calls
 646      * should not have the side-effect of setting up exit handlers, and
 647      * therefore, this code block is below the INIT_BASE_ONLY-conditioned early
 648      * return above.
 649      */
 650     if ((opts & OPENSSL_INIT_NO_ATEXIT) != 0) {
 651         if (!RUN_ONCE_ALT(&register_atexit, ossl_init_no_register_atexit,
 652                           ossl_init_register_atexit))
 653             return 0;
 654     } else if (!RUN_ONCE(&register_atexit, ossl_init_register_atexit)) {
 655         return 0;
 656     }
 657
 658     if (!RUN_ONCE(&load_crypto_nodelete, ossl_init_load_crypto_nodelete))
 659         return 0;
 660
 661     if ((opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
 662             && !RUN_ONCE_ALT(&load_crypto_strings,
 663                              ossl_init_no_load_crypto_strings,
 664                              ossl_init_load_crypto_strings))
 665         return 0;
 666
 667     if ((opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
 668             && !RUN_ONCE(&load_crypto_strings, ossl_init_load_crypto_strings))
 669         return 0;
 670
 671     if ((opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
 672             && !RUN_ONCE_ALT(&add_all_ciphers, ossl_init_no_add_all_ciphers,
 673                              ossl_init_add_all_ciphers))
 674         return 0;
 675
 676     if ((opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
 677             && !RUN_ONCE(&add_all_ciphers, ossl_init_add_all_ciphers))
 678         return 0;
 679
 680     if ((opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
 681             && !RUN_ONCE_ALT(&add_all_digests, ossl_init_no_add_all_digests,
 682                              ossl_init_add_all_digests))
 683         return 0;
 684
 685     if ((opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
 686             && !RUN_ONCE(&add_all_digests, ossl_init_add_all_digests))
 687         return 0;
 688
 689     if ((opts & OPENSSL_INIT_ATFORK)
 690             && !openssl_init_fork_handlers())
 691         return 0;
 692
 693     if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG)
 694             && !RUN_ONCE_ALT(&config, ossl_init_no_config, ossl_init_config))
 695         return 0;
 696
 697     if (opts & OPENSSL_INIT_LOAD_CONFIG) {
 698         int ret;
 699         CRYPTO_THREAD_write_lock(init_lock);
 700         conf_settings = settings;
 701         ret = RUN_ONCE(&config, ossl_init_config);
 702         conf_settings = NULL;
 703         CRYPTO_THREAD_unlock(init_lock);
 704         if (ret <= 0)
 705             return 0;
 706     }
 707
 708     if ((opts & OPENSSL_INIT_ASYNC)
 709             && !RUN_ONCE(&async, ossl_init_async))
 710         return 0;
 711
 712 #ifndef OPENSSL_NO_ENGINE
 713     if ((opts & OPENSSL_INIT_ENGINE_OPENSSL)
 714             && !RUN_ONCE(&engine_openssl, ossl_init_engine_openssl))
 715         return 0;
 716 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_DEVCRYPTOENG)
 717     if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV)
 718             && !RUN_ONCE(&engine_devcrypto, ossl_init_engine_devcrypto))
 719         return 0;
 720 # endif
 721 # ifndef OPENSSL_NO_RDRAND
 722     if ((opts & OPENSSL_INIT_ENGINE_RDRAND)
 723             && !RUN_ONCE(&engine_rdrand, ossl_init_engine_rdrand))
 724         return 0;
 725 # endif
 726     if ((opts & OPENSSL_INIT_ENGINE_DYNAMIC)
 727             && !RUN_ONCE(&engine_dynamic, ossl_init_engine_dynamic))
 728         return 0;
 729 # ifndef OPENSSL_NO_STATIC_ENGINE
 730 #  if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
 731     if ((opts & OPENSSL_INIT_ENGINE_PADLOCK)
 732             && !RUN_ONCE(&engine_padlock, ossl_init_engine_padlock))
 733         return 0;
 734 #  endif
 735 #  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
 736     if ((opts & OPENSSL_INIT_ENGINE_CAPI)
 737             && !RUN_ONCE(&engine_capi, ossl_init_engine_capi))
 738         return 0;
 739 #  endif
 740 #  if !defined(OPENSSL_NO_AFALGENG)
 741     if ((opts & OPENSSL_INIT_ENGINE_AFALG)
 742             && !RUN_ONCE(&engine_afalg, ossl_init_engine_afalg))
 743         return 0;
 744 #  endif
 745 # endif
 746     if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN
 747                 | OPENSSL_INIT_ENGINE_OPENSSL
 748                 | OPENSSL_INIT_ENGINE_AFALG)) {
 749         ENGINE_register_all_complete();
 750     }
 751 #endif
 752
 753 #ifndef OPENSSL_NO_COMP
 754     if ((opts & OPENSSL_INIT_ZLIB)
 755             && !RUN_ONCE(&zlib, ossl_init_zlib))
 756         return 0;
 757 #endif
 758
 759     return 1;
 760 }
 761
 762 int OPENSSL_atexit(void (*handler)(void))
 763 {
 764     OPENSSL_INIT_STOP *newhand;
 765
 766 #if !defined(OPENSSL_USE_NODELETE)\
 767     && !defined(OPENSSL_NO_PINSHARED)
 768     {
 769         union {
 770             void *sym;
 771             void (*func)(void);
 772         } handlersym;
 773
 774         handlersym.func = handler;
 775 # if defined(DSO_WIN32) && !defined(_WIN32_WCE)
 776         {
 777             HMODULE handle = NULL;
 778             BOOL ret;
 779
 780             /*
 781              * We don't use the DSO route for WIN32 because there is a better
 782              * way
 783              */
 784             ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
 785                                     | GET_MODULE_HANDLE_EX_FLAG_PIN,
 786                                     handlersym.sym, &handle);
 787
 788             if (!ret)
 789                 return 0;
 790         }
 791 # elif !defined(DSO_NONE)
 792         /*
 793          * Deliberately leak a reference to the handler. This will force the
 794          * library/code containing the handler to remain loaded until we run the
 795          * atexit handler. If -znodelete has been used then this is
 796          * unnecessary.
 797          */
 798         {
 799             DSO *dso = NULL;
 800
 801             ERR_set_mark();
 802             dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE);
 803 #  ifdef OPENSSL_INIT_DEBUG
 804             fprintf(stderr,
 805                     "OPENSSL_INIT: OPENSSL_atexit: obtained DSO reference? %s\n",
 806                     (dso == NULL ? "No!" : "Yes."));
 807             /* See same code above in ossl_init_base() for an explanation. */
 808 #  endif
 809             DSO_free(dso);
 810             ERR_pop_to_mark();
 811         }
 812 # endif
 813     }
 814 #endif
 815
 816     if ((newhand = OPENSSL_malloc(sizeof(*newhand))) == NULL) {
 817         CRYPTOerr(CRYPTO_F_OPENSSL_ATEXIT, ERR_R_MALLOC_FAILURE);
 818         return 0;
 819     }
 820
 821     newhand->handler = handler;
 822     newhand->next = stop_handlers;
 823     stop_handlers = newhand;
 824
 825     return 1;
 826 }
 827
 828 #ifdef OPENSSL_SYS_UNIX
 829 /*
 830  * The following three functions are for OpenSSL developers.  This is
 831  * where we set/reset state across fork (called via pthread_atfork when
 832  * it exists, or manually by the application when it doesn't).
 833  *
 834  * WARNING!  If you put code in either OPENSSL_fork_parent or
 835  * OPENSSL_fork_child, you MUST MAKE SURE that they are async-signal-
 836  * safe.  See this link, for example:
 837  *      http://man7.org/linux/man-pages/man7/signal-safety.7.html
 838  */
 839
 840 void OPENSSL_fork_prepare(void)
 841 {
 842 }
 843
 844 void OPENSSL_fork_parent(void)
 845 {
 846 }
 847
 848 void OPENSSL_fork_child(void)
 849 {
 850 }
 851 #endif