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 OPENSSL_INIT_SETTINGS *conf_settings = NULL;
 315 DEFINE_RUN_ONCE_STATIC(ossl_init_config)
 316 {
 317     int ret = openssl_config_int(conf_settings);
 318     config_inited = 1;
 319     return ret;
 320 }
 321 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_config, ossl_init_config)
 322 {
 323 #ifdef OPENSSL_INIT_DEBUG
 324     fprintf(stderr,
 325             "OPENSSL_INIT: ossl_init_config: openssl_no_config_int()\n");
 326 #endif
 327     openssl_no_config_int();
 328     config_inited = 1;
 329     return 1;
 330 }
 331
 332 static CRYPTO_ONCE async = CRYPTO_ONCE_STATIC_INIT;
 333 static int async_inited = 0;
 334 DEFINE_RUN_ONCE_STATIC(ossl_init_async)
 335 {
 336 #ifdef OPENSSL_INIT_DEBUG
 337     fprintf(stderr, "OPENSSL_INIT: ossl_init_async: async_init()\n");
 338 #endif
 339     if (!async_init())
 340         return 0;
 341     async_inited = 1;
 342     return 1;
 343 }
 344
 345 #ifndef OPENSSL_NO_ENGINE
 346 static CRYPTO_ONCE engine_openssl = CRYPTO_ONCE_STATIC_INIT;
 347 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_openssl)
 348 {
 349 # ifdef OPENSSL_INIT_DEBUG
 350     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_openssl: "
 351                     "engine_load_openssl_int()\n");
 352 # endif
 353     engine_load_openssl_int();
 354     return 1;
 355 }
 356
 357 # ifndef OPENSSL_NO_RDRAND
 358 static CRYPTO_ONCE engine_rdrand = CRYPTO_ONCE_STATIC_INIT;
 359 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_rdrand)
 360 {
 361 #  ifdef OPENSSL_INIT_DEBUG
 362     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_rdrand: "
 363                     "engine_load_rdrand_int()\n");
 364 #  endif
 365     engine_load_rdrand_int();
 366     return 1;
 367 }
 368 # endif
 369 static CRYPTO_ONCE engine_dynamic = CRYPTO_ONCE_STATIC_INIT;
 370 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_dynamic)
 371 {
 372 # ifdef OPENSSL_INIT_DEBUG
 373     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dynamic: "
 374                     "engine_load_dynamic_int()\n");
 375 # endif
 376     engine_load_dynamic_int();
 377     return 1;
 378 }
 379 # ifndef OPENSSL_NO_STATIC_ENGINE
 380 #  ifndef OPENSSL_NO_DEVCRYPTOENG
 381 static CRYPTO_ONCE engine_devcrypto = CRYPTO_ONCE_STATIC_INIT;
 382 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_devcrypto)
 383 {
 384 #   ifdef OPENSSL_INIT_DEBUG
 385     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_devcrypto: "
 386                     "engine_load_devcrypto_int()\n");
 387 #   endif
 388     engine_load_devcrypto_int();
 389     return 1;
 390 }
 391 #  endif
 392 #  if !defined(OPENSSL_NO_PADLOCKENG)
 393 static CRYPTO_ONCE engine_padlock = CRYPTO_ONCE_STATIC_INIT;
 394 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_padlock)
 395 {
 396 #   ifdef OPENSSL_INIT_DEBUG
 397     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_padlock: "
 398                     "engine_load_padlock_int()\n");
 399 #   endif
 400     engine_load_padlock_int();
 401     return 1;
 402 }
 403 #  endif
 404 #  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
 405 static CRYPTO_ONCE engine_capi = CRYPTO_ONCE_STATIC_INIT;
 406 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_capi)
 407 {
 408 #   ifdef OPENSSL_INIT_DEBUG
 409     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_capi: "
 410                     "engine_load_capi_int()\n");
 411 #   endif
 412     engine_load_capi_int();
 413     return 1;
 414 }
 415 #  endif
 416 #  if !defined(OPENSSL_NO_AFALGENG)
 417 static CRYPTO_ONCE engine_afalg = CRYPTO_ONCE_STATIC_INIT;
 418 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_afalg)
 419 {
 420 #   ifdef OPENSSL_INIT_DEBUG
 421     fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_afalg: "
 422                     "engine_load_afalg_int()\n");
 423 #   endif
 424     engine_load_afalg_int();
 425     return 1;
 426 }
 427 #  endif
 428 # endif
 429 #endif
 430
 431 #ifndef OPENSSL_NO_COMP
 432 static CRYPTO_ONCE zlib = CRYPTO_ONCE_STATIC_INIT;
 433
 434 static int zlib_inited = 0;
 435 DEFINE_RUN_ONCE_STATIC(ossl_init_zlib)
 436 {
 437     /* Do nothing - we need to know about this for the later cleanup */
 438     zlib_inited = 1;
 439     return 1;
 440 }
 441 #endif
 442
 443 static void ossl_init_thread_stop(struct thread_local_inits_st *locals)
 444 {
 445     /* Can't do much about this */
 446     if (locals == NULL)
 447         return;
 448
 449     if (locals->async) {
 450 #ifdef OPENSSL_INIT_DEBUG
 451         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
 452                         "async_delete_thread_state()\n");
 453 #endif
 454         async_delete_thread_state();
 455     }
 456
 457     if (locals->err_state) {
 458 #ifdef OPENSSL_INIT_DEBUG
 459         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
 460                         "err_delete_thread_state()\n");
 461 #endif
 462         err_delete_thread_state();
 463     }
 464
 465     if (locals->rand) {
 466 #ifdef OPENSSL_INIT_DEBUG
 467         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
 468                         "drbg_delete_thread_state()\n");
 469 #endif
 470         drbg_delete_thread_state();
 471     }
 472
 473     OPENSSL_free(locals);
 474 }
 475
 476 void OPENSSL_thread_stop(void)
 477 {
 478     if (destructor_key.sane != -1)
 479         ossl_init_thread_stop(ossl_init_get_thread_local(0));
 480 }
 481
 482 int ossl_init_thread_start(uint64_t opts)
 483 {
 484     struct thread_local_inits_st *locals;
 485
 486     if (!OPENSSL_init_crypto(0, NULL))
 487         return 0;
 488
 489     locals = ossl_init_get_thread_local(1);
 490
 491     if (locals == NULL)
 492         return 0;
 493
 494     if (opts & OPENSSL_INIT_THREAD_ASYNC) {
 495 #ifdef OPENSSL_INIT_DEBUG
 496         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
 497                         "marking thread for async\n");
 498 #endif
 499         locals->async = 1;
 500     }
 501
 502     if (opts & OPENSSL_INIT_THREAD_ERR_STATE) {
 503 #ifdef OPENSSL_INIT_DEBUG
 504         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
 505                         "marking thread for err_state\n");
 506 #endif
 507         locals->err_state = 1;
 508     }
 509
 510     if (opts & OPENSSL_INIT_THREAD_RAND) {
 511 #ifdef OPENSSL_INIT_DEBUG
 512         fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
 513                         "marking thread for rand\n");
 514 #endif
 515         locals->rand = 1;
 516     }
 517
 518     return 1;
 519 }
 520
 521 void OPENSSL_cleanup(void)
 522 {
 523     OPENSSL_INIT_STOP *currhandler, *lasthandler;
 524     CRYPTO_THREAD_LOCAL key;
 525
 526     /* If we've not been inited then no need to deinit */
 527     if (!base_inited)
 528         return;
 529
 530     /* Might be explicitly called and also by atexit */
 531     if (stopped)
 532         return;
 533     stopped = 1;
 534
 535     /*
 536      * Thread stop may not get automatically called by the thread library for
 537      * the very last thread in some situations, so call it directly.
 538      */
 539     ossl_init_thread_stop(ossl_init_get_thread_local(0));
 540
 541     currhandler = stop_handlers;
 542     while (currhandler != NULL) {
 543         currhandler->handler();
 544         lasthandler = currhandler;
 545         currhandler = currhandler->next;
 546         OPENSSL_free(lasthandler);
 547     }
 548     stop_handlers = NULL;
 549
 550     CRYPTO_THREAD_lock_free(init_lock);
 551     init_lock = NULL;
 552
 553     /*
 554      * We assume we are single-threaded for this function, i.e. no race
 555      * conditions for the various "*_inited" vars below.
 556      */
 557
 558 #ifndef OPENSSL_NO_COMP
 559     if (zlib_inited) {
 560 #ifdef OPENSSL_INIT_DEBUG
 561         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 562                         "comp_zlib_cleanup_int()\n");
 563 #endif
 564         comp_zlib_cleanup_int();
 565     }
 566 #endif
 567
 568     if (async_inited) {
 569 # ifdef OPENSSL_INIT_DEBUG
 570         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 571                         "async_deinit()\n");
 572 # endif
 573         async_deinit();
 574     }
 575
 576     if (load_crypto_strings_inited) {
 577 #ifdef OPENSSL_INIT_DEBUG
 578         fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 579                         "err_free_strings_int()\n");
 580 #endif
 581         err_free_strings_int();
 582     }
 583
 584     key = destructor_key.value;
 585     destructor_key.sane = -1;
 586     CRYPTO_THREAD_cleanup_local(&key);
 587
 588 #ifdef OPENSSL_INIT_DEBUG
 589     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 590                     "rand_cleanup_int()\n");
 591     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 592                     "conf_modules_free_int()\n");
 593 #ifndef OPENSSL_NO_ENGINE
 594     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 595                     "engine_cleanup_int()\n");
 596 #endif
 597     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 598                     "crypto_cleanup_all_ex_data_int()\n");
 599     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 600                     "bio_sock_cleanup_int()\n");
 601     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 602                     "bio_cleanup()\n");
 603     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 604                     "evp_cleanup_int()\n");
 605     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 606                     "obj_cleanup_int()\n");
 607     fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
 608                     "err_cleanup()\n");
 609 #endif
 610     /*
 611      * Note that cleanup order is important:
 612      * - rand_cleanup_int could call an ENGINE's RAND cleanup function so
 613      * must be called before engine_cleanup_int()
 614      * - ENGINEs use CRYPTO_EX_DATA and therefore, must be cleaned up
 615      * before the ex data handlers are wiped in CRYPTO_cleanup_all_ex_data().
 616      * - conf_modules_free_int() can end up in ENGINE code so must be called
 617      * before engine_cleanup_int()
 618      * - ENGINEs and additional EVP algorithms might use added OIDs names so
 619      * obj_cleanup_int() must be called last
 620      */
 621     rand_cleanup_int();
 622     rand_drbg_cleanup_int();
 623     conf_modules_free_int();
 624 #ifndef OPENSSL_NO_ENGINE
 625     engine_cleanup_int();
 626 #endif
 627     ossl_store_cleanup_int();
 628     crypto_cleanup_all_ex_data_int();
 629     bio_cleanup();
 630     evp_cleanup_int();
 631     obj_cleanup_int();
 632     err_cleanup();
 633
 634     CRYPTO_secure_malloc_done();
 635
 636     base_inited = 0;
 637 }
 638
 639 /*
 640  * If this function is called with a non NULL settings value then it must be
 641  * called prior to any threads making calls to any OpenSSL functions,
 642  * i.e. passing a non-null settings value is assumed to be single-threaded.
 643  */
 644 int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
 645 {
 646     if (stopped) {
 647         if (!(opts & OPENSSL_INIT_BASE_ONLY))
 648             CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
 649         return 0;
 650     }
 651
 652     /*
 653      * When the caller specifies OPENSSL_INIT_BASE_ONLY, that should be the
 654      * *only* option specified.  With that option we return immediately after
 655      * doing the requested limited initialization.  Note that
 656      * err_shelve_state() called by us via ossl_init_load_crypto_nodelete()
 657      * re-enters OPENSSL_init_crypto() with OPENSSL_INIT_BASE_ONLY, but with
 658      * base already initialized this is a harmless NOOP.
 659      *
 660      * If we remain the only caller of err_shelve_state() the recursion should
 661      * perhaps be removed, but if in doubt, it can be left in place.
 662      */
 663     if (!RUN_ONCE(&base, ossl_init_base))
 664         return 0;
 665
 666     if (opts & OPENSSL_INIT_BASE_ONLY)
 667         return 1;
 668
 669     /*
 670      * Now we don't always set up exit handlers, the INIT_BASE_ONLY calls
 671      * should not have the side-effect of setting up exit handlers, and
 672      * therefore, this code block is below the INIT_BASE_ONLY-conditioned early
 673      * return above.
 674      */
 675     if ((opts & OPENSSL_INIT_NO_ATEXIT) != 0) {
 676         if (!RUN_ONCE_ALT(&register_atexit, ossl_init_no_register_atexit,
 677                           ossl_init_register_atexit))
 678             return 0;
 679     } else if (!RUN_ONCE(&register_atexit, ossl_init_register_atexit)) {
 680         return 0;
 681     }
 682
 683     if (!RUN_ONCE(&load_crypto_nodelete, ossl_init_load_crypto_nodelete))
 684         return 0;
 685
 686     if ((opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
 687             && !RUN_ONCE_ALT(&load_crypto_strings,
 688                              ossl_init_no_load_crypto_strings,
 689                              ossl_init_load_crypto_strings))
 690         return 0;
 691
 692     if ((opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
 693             && !RUN_ONCE(&load_crypto_strings, ossl_init_load_crypto_strings))
 694         return 0;
 695
 696     if ((opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
 697             && !RUN_ONCE_ALT(&add_all_ciphers, ossl_init_no_add_all_ciphers,
 698                              ossl_init_add_all_ciphers))
 699         return 0;
 700
 701     if ((opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
 702             && !RUN_ONCE(&add_all_ciphers, ossl_init_add_all_ciphers))
 703         return 0;
 704
 705     if ((opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
 706             && !RUN_ONCE_ALT(&add_all_digests, ossl_init_no_add_all_digests,
 707                              ossl_init_add_all_digests))
 708         return 0;
 709
 710     if ((opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
 711             && !RUN_ONCE(&add_all_digests, ossl_init_add_all_digests))
 712         return 0;
 713
 714     if ((opts & OPENSSL_INIT_NO_ADD_ALL_MACS)
 715             && !RUN_ONCE_ALT(&add_all_macs, ossl_init_no_add_all_macs,
 716                              ossl_init_add_all_macs))
 717         return 0;
 718
 719     if ((opts & OPENSSL_INIT_ADD_ALL_MACS)
 720             && !RUN_ONCE(&add_all_macs, ossl_init_add_all_macs))
 721         return 0;
 722
 723     if ((opts & OPENSSL_INIT_ATFORK)
 724             && !openssl_init_fork_handlers())
 725         return 0;
 726
 727     if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG)
 728             && !RUN_ONCE_ALT(&config, ossl_init_no_config, ossl_init_config))
 729         return 0;
 730
 731     if (opts & OPENSSL_INIT_LOAD_CONFIG) {
 732         int ret;
 733         CRYPTO_THREAD_write_lock(init_lock);
 734         conf_settings = settings;
 735         ret = RUN_ONCE(&config, ossl_init_config);
 736         conf_settings = NULL;
 737         CRYPTO_THREAD_unlock(init_lock);
 738         if (!ret)
 739             return 0;
 740     }
 741
 742     if ((opts & OPENSSL_INIT_ASYNC)
 743             && !RUN_ONCE(&async, ossl_init_async))
 744         return 0;
 745
 746 #ifndef OPENSSL_NO_ENGINE
 747     if ((opts & OPENSSL_INIT_ENGINE_OPENSSL)
 748             && !RUN_ONCE(&engine_openssl, ossl_init_engine_openssl))
 749         return 0;
 750 # ifndef OPENSSL_NO_RDRAND
 751     if ((opts & OPENSSL_INIT_ENGINE_RDRAND)
 752             && !RUN_ONCE(&engine_rdrand, ossl_init_engine_rdrand))
 753         return 0;
 754 # endif
 755     if ((opts & OPENSSL_INIT_ENGINE_DYNAMIC)
 756             && !RUN_ONCE(&engine_dynamic, ossl_init_engine_dynamic))
 757         return 0;
 758 # ifndef OPENSSL_NO_STATIC_ENGINE
 759 #  ifndef OPENSSL_NO_DEVCRYPTOENG
 760     if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV)
 761             && !RUN_ONCE(&engine_devcrypto, ossl_init_engine_devcrypto))
 762         return 0;
 763 #  endif
 764 #  if !defined(OPENSSL_NO_PADLOCKENG)
 765     if ((opts & OPENSSL_INIT_ENGINE_PADLOCK)
 766             && !RUN_ONCE(&engine_padlock, ossl_init_engine_padlock))
 767         return 0;
 768 #  endif
 769 #  if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
 770     if ((opts & OPENSSL_INIT_ENGINE_CAPI)
 771             && !RUN_ONCE(&engine_capi, ossl_init_engine_capi))
 772         return 0;
 773 #  endif
 774 #  if !defined(OPENSSL_NO_AFALGENG)
 775     if ((opts & OPENSSL_INIT_ENGINE_AFALG)
 776             && !RUN_ONCE(&engine_afalg, ossl_init_engine_afalg))
 777         return 0;
 778 #  endif
 779 # endif
 780     if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN
 781                 | OPENSSL_INIT_ENGINE_OPENSSL
 782                 | OPENSSL_INIT_ENGINE_AFALG)) {
 783         ENGINE_register_all_complete();
 784     }
 785 #endif
 786
 787 #ifndef OPENSSL_NO_COMP
 788     if ((opts & OPENSSL_INIT_ZLIB)
 789             && !RUN_ONCE(&zlib, ossl_init_zlib))
 790         return 0;
 791 #endif
 792
 793     return 1;
 794 }
 795
 796 int OPENSSL_atexit(void (*handler)(void))
 797 {
 798     OPENSSL_INIT_STOP *newhand;
 799
 800 #if !defined(OPENSSL_NO_DSO) \
 801     && !defined(OPENSSL_USE_NODELETE)\
 802     && !defined(OPENSSL_NO_PINSHARED)
 803     {
 804         union {
 805             void *sym;
 806             void (*func)(void);
 807         } handlersym;
 808
 809         handlersym.func = handler;
 810 # ifdef DSO_WIN32
 811         {
 812             HMODULE handle = NULL;
 813             BOOL ret;
 814
 815             /*
 816              * We don't use the DSO route for WIN32 because there is a better
 817              * way
 818              */
 819             ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
 820                                     | GET_MODULE_HANDLE_EX_FLAG_PIN,
 821                                     handlersym.sym, &handle);
 822
 823             if (!ret)
 824                 return 0;
 825         }
 826 # else
 827         /*
 828          * Deliberately leak a reference to the handler. This will force the
 829          * library/code containing the handler to remain loaded until we run the
 830          * atexit handler. If -znodelete has been used then this is
 831          * unnecessary.
 832          */
 833         {
 834             DSO *dso = NULL;
 835
 836             ERR_set_mark();
 837             dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE);
 838 #  ifdef OPENSSL_INIT_DEBUG
 839             fprintf(stderr,
 840                     "OPENSSL_INIT: OPENSSL_atexit: obtained DSO reference? %s\n",
 841                     (dso == NULL ? "No!" : "Yes."));
 842             /* See same code above in ossl_init_base() for an explanation. */
 843 #  endif
 844             DSO_free(dso);
 845             ERR_pop_to_mark();
 846         }
 847 # endif
 848     }
 849 #endif
 850
 851     if ((newhand = OPENSSL_malloc(sizeof(*newhand))) == NULL) {
 852         CRYPTOerr(CRYPTO_F_OPENSSL_ATEXIT, ERR_R_MALLOC_FAILURE);
 853         return 0;
 854     }
 855
 856     newhand->handler = handler;
 857     newhand->next = stop_handlers;
 858     stop_handlers = newhand;
 859
 860     return 1;
 861 }
 862
 863 #ifdef OPENSSL_SYS_UNIX
 864 /*
 865  * The following three functions are for OpenSSL developers.  This is
 866  * where we set/reset state across fork (called via pthread_atfork when
 867  * it exists, or manually by the application when it doesn't).
 868  *
 869  * WARNING!  If you put code in either OPENSSL_fork_parent or
 870  * OPENSSL_fork_child, you MUST MAKE SURE that they are async-signal-
 871  * safe.  See this link, for example:
 872  *      http://man7.org/linux/man-pages/man7/signal-safety.7.html
 873  */
 874
 875 void OPENSSL_fork_prepare(void)
 876 {
 877 }
 878
 879 void OPENSSL_fork_parent(void)
 880 {
 881 }
 882
 883 void OPENSSL_fork_child(void)
 884 {
 885     rand_fork();
 886 }
 887 #endif