crypto/provider_core.c

   1 /*
   2  * Copyright 2019-2021 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 <assert.h>
  11 #include <openssl/core.h>
  12 #include <openssl/core_dispatch.h>
  13 #include <openssl/core_names.h>
  14 #include <openssl/provider.h>
  15 #include <openssl/params.h>
  16 #include <openssl/opensslv.h>
  17 #include "crypto/cryptlib.h"
  18 #include "crypto/evp.h" /* evp_method_store_flush */
  19 #include "crypto/rand.h"
  20 #include "internal/nelem.h"
  21 #include "internal/thread_once.h"
  22 #include "internal/provider.h"
  23 #include "internal/refcount.h"
  24 #include "internal/bio.h"
  25 #include "provider_local.h"
  26 #ifndef FIPS_MODULE
  27 # include <openssl/self_test.h>
  28 #endif
  29
  30 static OSSL_PROVIDER *provider_new(const char *name,
  31                                    OSSL_provider_init_fn *init_function);
  32
  33 /*-
  34  * Provider Object structure
  35  * =========================
  36  */
  37
  38 typedef struct {
  39     char *name;
  40     char *value;
  41 } INFOPAIR;
  42 DEFINE_STACK_OF(INFOPAIR)
  43
  44 struct provider_store_st;        /* Forward declaration */
  45
  46 struct ossl_provider_st {
  47     /* Flag bits */
  48     unsigned int flag_initialized:1;
  49     unsigned int flag_activated:1;
  50     unsigned int flag_fallback:1; /* Can be used as fallback */
  51     unsigned int flag_activated_as_fallback:1;
  52
  53     /* Getting and setting the flags require synchronization */
  54     CRYPTO_RWLOCK *flag_lock;
  55
  56     /* OpenSSL library side data */
  57     CRYPTO_REF_COUNT refcnt;
  58     CRYPTO_RWLOCK *refcnt_lock;  /* For the ref counter */
  59     CRYPTO_REF_COUNT activatecnt;
  60     CRYPTO_RWLOCK *activatecnt_lock; /* For the activate counter */
  61     char *name;
  62     char *path;
  63     DSO *module;
  64     OSSL_provider_init_fn *init_function;
  65     STACK_OF(INFOPAIR) *parameters;
  66     OSSL_LIB_CTX *libctx; /* The library context this instance is in */
  67     struct provider_store_st *store; /* The store this instance belongs to */
  68 #ifndef FIPS_MODULE
  69     /*
  70      * In the FIPS module inner provider, this isn't needed, since the
  71      * error upcalls are always direct calls to the outer provider.
  72      */
  73     int error_lib;     /* ERR library number, one for each provider */
  74 # ifndef OPENSSL_NO_ERR
  75     ERR_STRING_DATA *error_strings; /* Copy of what the provider gives us */
  76 # endif
  77 #endif
  78
  79     /* Provider side functions */
  80     OSSL_FUNC_provider_teardown_fn *teardown;
  81     OSSL_FUNC_provider_gettable_params_fn *gettable_params;
  82     OSSL_FUNC_provider_get_params_fn *get_params;
  83     OSSL_FUNC_provider_get_capabilities_fn *get_capabilities;
  84     OSSL_FUNC_provider_self_test_fn *self_test;
  85     OSSL_FUNC_provider_query_operation_fn *query_operation;
  86     OSSL_FUNC_provider_unquery_operation_fn *unquery_operation;
  87
  88     /*
  89      * Cache of bit to indicate of query_operation() has been called on
  90      * a specific operation or not.
  91      */
  92     unsigned char *operation_bits;
  93     size_t operation_bits_sz;
  94     CRYPTO_RWLOCK *opbits_lock;
  95
  96     /* Provider side data */
  97     void *provctx;
  98 };
  99 DEFINE_STACK_OF(OSSL_PROVIDER)
 100
 101 static int ossl_provider_cmp(const OSSL_PROVIDER * const *a,
 102                              const OSSL_PROVIDER * const *b)
 103 {
 104     return strcmp((*a)->name, (*b)->name);
 105 }
 106
 107 /*-
 108  * Provider Object store
 109  * =====================
 110  *
 111  * The Provider Object store is a library context object, and therefore needs
 112  * an index.
 113  */
 114
 115 struct provider_store_st {
 116     STACK_OF(OSSL_PROVIDER) *providers;
 117     CRYPTO_RWLOCK *lock;
 118     char *default_path;
 119     unsigned int use_fallbacks:1;
 120 };
 121
 122 /*
 123  * provider_deactivate_free() is a wrapper around ossl_provider_deactivate()
 124  * and ossl_provider_free(), called as needed.
 125  * Since this is only called when the provider store is being emptied, we
 126  * don't need to care about any lock.
 127  */
 128 static void provider_deactivate_free(OSSL_PROVIDER *prov)
 129 {
 130     if (prov->flag_activated)
 131         ossl_provider_deactivate(prov);
 132     ossl_provider_free(prov);
 133 }
 134
 135 static void provider_store_free(void *vstore)
 136 {
 137     struct provider_store_st *store = vstore;
 138
 139     if (store == NULL)
 140         return;
 141     OPENSSL_free(store->default_path);
 142     sk_OSSL_PROVIDER_pop_free(store->providers, provider_deactivate_free);
 143     CRYPTO_THREAD_lock_free(store->lock);
 144     OPENSSL_free(store);
 145 }
 146
 147 static void *provider_store_new(OSSL_LIB_CTX *ctx)
 148 {
 149     struct provider_store_st *store = OPENSSL_zalloc(sizeof(*store));
 150     const struct predefined_providers_st *p = NULL;
 151
 152     if (store == NULL
 153         || (store->providers = sk_OSSL_PROVIDER_new(ossl_provider_cmp)) == NULL
 154         || (store->lock = CRYPTO_THREAD_lock_new()) == NULL) {
 155         provider_store_free(store);
 156         return NULL;
 157     }
 158     store->use_fallbacks = 1;
 159
 160     for (p = predefined_providers; p->name != NULL; p++) {
 161         OSSL_PROVIDER *prov = NULL;
 162
 163         /*
 164          * We use the internal constructor directly here,
 165          * otherwise we get a call loop
 166          */
 167         prov = provider_new(p->name, p->init);
 168
 169         if (prov == NULL
 170             || sk_OSSL_PROVIDER_push(store->providers, prov) == 0) {
 171             ossl_provider_free(prov);
 172             provider_store_free(store);
 173             ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
 174             return NULL;
 175         }
 176         prov->libctx = ctx;
 177         prov->store = store;
 178 #ifndef FIPS_MODULE
 179         prov->error_lib = ERR_get_next_error_library();
 180 #endif
 181         if(p->is_fallback)
 182             ossl_provider_set_fallback(prov);
 183     }
 184
 185     return store;
 186 }
 187
 188 static const OSSL_LIB_CTX_METHOD provider_store_method = {
 189     provider_store_new,
 190     provider_store_free,
 191 };
 192
 193 static struct provider_store_st *get_provider_store(OSSL_LIB_CTX *libctx)
 194 {
 195     struct provider_store_st *store = NULL;
 196
 197     store = ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_PROVIDER_STORE_INDEX,
 198                                   &provider_store_method);
 199     if (store == NULL)
 200         ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
 201     return store;
 202 }
 203
 204 int ossl_provider_disable_fallback_loading(OSSL_LIB_CTX *libctx)
 205 {
 206     struct provider_store_st *store;
 207
 208     if ((store = get_provider_store(libctx)) != NULL) {
 209         if (!CRYPTO_THREAD_write_lock(store->lock))
 210             return 0;
 211         store->use_fallbacks = 0;
 212         CRYPTO_THREAD_unlock(store->lock);
 213         return 1;
 214     }
 215     return 0;
 216 }
 217
 218 OSSL_PROVIDER *ossl_provider_find(OSSL_LIB_CTX *libctx, const char *name,
 219                                   int noconfig)
 220 {
 221     struct provider_store_st *store = NULL;
 222     OSSL_PROVIDER *prov = NULL;
 223
 224     if ((store = get_provider_store(libctx)) != NULL) {
 225         OSSL_PROVIDER tmpl = { 0, };
 226         int i;
 227
 228 #ifndef FIPS_MODULE
 229         /*
 230          * Make sure any providers are loaded from config before we try to find
 231          * them.
 232          */
 233         if (!noconfig)
 234             OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
 235 #endif
 236
 237         tmpl.name = (char *)name;
 238         if (!CRYPTO_THREAD_write_lock(store->lock))
 239             return NULL;
 240         if ((i = sk_OSSL_PROVIDER_find(store->providers, &tmpl)) == -1
 241             || (prov = sk_OSSL_PROVIDER_value(store->providers, i)) == NULL
 242             || !ossl_provider_up_ref(prov))
 243             prov = NULL;
 244         CRYPTO_THREAD_unlock(store->lock);
 245     }
 246
 247     return prov;
 248 }
 249
 250 /*-
 251  * Provider Object methods
 252  * =======================
 253  */
 254
 255 static OSSL_PROVIDER *provider_new(const char *name,
 256                                    OSSL_provider_init_fn *init_function)
 257 {
 258     OSSL_PROVIDER *prov = NULL;
 259
 260     if ((prov = OPENSSL_zalloc(sizeof(*prov))) == NULL
 261 #ifndef HAVE_ATOMICS
 262         || (prov->refcnt_lock = CRYPTO_THREAD_lock_new()) == NULL
 263         || (prov->activatecnt_lock = CRYPTO_THREAD_lock_new()) == NULL
 264 #endif
 265         || !ossl_provider_up_ref(prov) /* +1 One reference to be returned */
 266         || (prov->opbits_lock = CRYPTO_THREAD_lock_new()) == NULL
 267         || (prov->flag_lock = CRYPTO_THREAD_lock_new()) == NULL
 268         || (prov->name = OPENSSL_strdup(name)) == NULL) {
 269         ossl_provider_free(prov);
 270         ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
 271         return NULL;
 272     }
 273
 274     prov->init_function = init_function;
 275     return prov;
 276 }
 277
 278 int ossl_provider_up_ref(OSSL_PROVIDER *prov)
 279 {
 280     int ref = 0;
 281
 282     if (CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock) <= 0)
 283         return 0;
 284     return ref;
 285 }
 286
 287 OSSL_PROVIDER *ossl_provider_new(OSSL_LIB_CTX *libctx, const char *name,
 288                                  OSSL_provider_init_fn *init_function,
 289                                  int noconfig)
 290 {
 291     struct provider_store_st *store = NULL;
 292     OSSL_PROVIDER *prov = NULL;
 293
 294     if ((store = get_provider_store(libctx)) == NULL)
 295         return NULL;
 296
 297     if ((prov = ossl_provider_find(libctx, name,
 298                                    noconfig)) != NULL) { /* refcount +1 */
 299         ossl_provider_free(prov); /* refcount -1 */
 300         ERR_raise_data(ERR_LIB_CRYPTO, CRYPTO_R_PROVIDER_ALREADY_EXISTS,
 301                        "name=%s", name);
 302         return NULL;
 303     }
 304
 305     /* provider_new() generates an error, so no need here */
 306     if ((prov = provider_new(name, init_function)) == NULL)
 307         return NULL;
 308
 309     if (!CRYPTO_THREAD_write_lock(store->lock))
 310         return NULL;
 311     if (!ossl_provider_up_ref(prov)) { /* +1 One reference for the store */
 312         ossl_provider_free(prov); /* -1 Reference that was to be returned */
 313         prov = NULL;
 314     } else if (sk_OSSL_PROVIDER_push(store->providers, prov) == 0) {
 315         ossl_provider_free(prov); /* -1 Store reference */
 316         ossl_provider_free(prov); /* -1 Reference that was to be returned */
 317         prov = NULL;
 318     } else {
 319         prov->libctx = libctx;
 320         prov->store = store;
 321 #ifndef FIPS_MODULE
 322         prov->error_lib = ERR_get_next_error_library();
 323 #endif
 324     }
 325     CRYPTO_THREAD_unlock(store->lock);
 326
 327     if (prov == NULL)
 328         ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
 329
 330     /*
 331      * At this point, the provider is only partially "loaded".  To be
 332      * fully "loaded", ossl_provider_activate() must also be called.
 333      */
 334
 335     return prov;
 336 }
 337
 338 static void free_infopair(INFOPAIR *pair)
 339 {
 340     OPENSSL_free(pair->name);
 341     OPENSSL_free(pair->value);
 342     OPENSSL_free(pair);
 343 }
 344
 345 void ossl_provider_free(OSSL_PROVIDER *prov)
 346 {
 347     if (prov != NULL) {
 348         int ref = 0;
 349
 350         CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
 351
 352         /*
 353          * When the refcount drops to zero, we clean up the provider.
 354          * Note that this also does teardown, which may seem late,
 355          * considering that init happens on first activation.  However,
 356          * there may be other structures hanging on to the provider after
 357          * the last deactivation and may therefore need full access to the
 358          * provider's services.  Therefore, we deinit late.
 359          */
 360         if (ref == 0) {
 361             if (prov->flag_initialized) {
 362 #ifndef FIPS_MODULE
 363                 ossl_init_thread_deregister(prov);
 364 #endif
 365                 if (prov->teardown != NULL)
 366                     prov->teardown(prov->provctx);
 367 #ifndef OPENSSL_NO_ERR
 368 # ifndef FIPS_MODULE
 369                 if (prov->error_strings != NULL) {
 370                     ERR_unload_strings(prov->error_lib, prov->error_strings);
 371                     OPENSSL_free(prov->error_strings);
 372                     prov->error_strings = NULL;
 373                 }
 374 # endif
 375 #endif
 376                 OPENSSL_free(prov->operation_bits);
 377                 prov->operation_bits = NULL;
 378                 prov->operation_bits_sz = 0;
 379                 prov->flag_initialized = 0;
 380             }
 381
 382 #ifndef FIPS_MODULE
 383             DSO_free(prov->module);
 384 #endif
 385             OPENSSL_free(prov->name);
 386             OPENSSL_free(prov->path);
 387             sk_INFOPAIR_pop_free(prov->parameters, free_infopair);
 388             CRYPTO_THREAD_lock_free(prov->opbits_lock);
 389             CRYPTO_THREAD_lock_free(prov->flag_lock);
 390 #ifndef HAVE_ATOMICS
 391             CRYPTO_THREAD_lock_free(prov->refcnt_lock);
 392             CRYPTO_THREAD_lock_free(prov->activatecnt_lock);
 393 #endif
 394             OPENSSL_free(prov);
 395         }
 396     }
 397 }
 398
 399 /* Setters */
 400 int ossl_provider_set_module_path(OSSL_PROVIDER *prov, const char *module_path)
 401 {
 402     OPENSSL_free(prov->path);
 403     if (module_path == NULL)
 404         return 1;
 405     if ((prov->path = OPENSSL_strdup(module_path)) != NULL)
 406         return 1;
 407     ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
 408     return 0;
 409 }
 410
 411 int ossl_provider_add_parameter(OSSL_PROVIDER *prov,
 412                                 const char *name, const char *value)
 413 {
 414     INFOPAIR *pair = NULL;
 415
 416     if ((pair = OPENSSL_zalloc(sizeof(*pair))) != NULL
 417         && (prov->parameters != NULL
 418             || (prov->parameters = sk_INFOPAIR_new_null()) != NULL)
 419         && (pair->name = OPENSSL_strdup(name)) != NULL
 420         && (pair->value = OPENSSL_strdup(value)) != NULL
 421         && sk_INFOPAIR_push(prov->parameters, pair) > 0)
 422         return 1;
 423
 424     if (pair != NULL) {
 425         OPENSSL_free(pair->name);
 426         OPENSSL_free(pair->value);
 427         OPENSSL_free(pair);
 428     }
 429     ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
 430     return 0;
 431 }
 432
 433 /*
 434  * Provider activation.
 435  *
 436  * What "activation" means depends on the provider form; for built in
 437  * providers (in the library or the application alike), the provider
 438  * can already be considered to be loaded, all that's needed is to
 439  * initialize it.  However, for dynamically loadable provider modules,
 440  * we must first load that module.
 441  *
 442  * Built in modules are distinguished from dynamically loaded modules
 443  * with an already assigned init function.
 444  */
 445 static const OSSL_DISPATCH *core_dispatch; /* Define further down */
 446
 447 int OSSL_PROVIDER_set_default_search_path(OSSL_LIB_CTX *libctx,
 448                                           const char *path)
 449 {
 450     struct provider_store_st *store;
 451     char *p = NULL;
 452
 453     if (path != NULL) {
 454         p = OPENSSL_strdup(path);
 455         if (p == NULL) {
 456             ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
 457             return 0;
 458         }
 459     }
 460     if ((store = get_provider_store(libctx)) != NULL
 461             && CRYPTO_THREAD_write_lock(store->lock)) {
 462         OPENSSL_free(store->default_path);
 463         store->default_path = p;
 464         CRYPTO_THREAD_unlock(store->lock);
 465         return 1;
 466     }
 467     OPENSSL_free(p);
 468     return 0;
 469 }
 470
 471 /*
 472  * Internal version that doesn't affect the store flags, and thereby avoid
 473  * locking.  Direct callers must remember to set the store flags when
 474  * appropriate.
 475  */
 476 static int provider_init(OSSL_PROVIDER *prov)
 477 {
 478     const OSSL_DISPATCH *provider_dispatch = NULL;
 479     void *tmp_provctx = NULL;    /* safety measure */
 480 #ifndef OPENSSL_NO_ERR
 481 # ifndef FIPS_MODULE
 482     OSSL_FUNC_provider_get_reason_strings_fn *p_get_reason_strings = NULL;
 483 # endif
 484 #endif
 485     int ok = 0;
 486
 487     /*
 488      * The flag lock is used to lock init, not only because the flag is
 489      * checked here and set at the end, but also because this function
 490      * modifies a number of things in the provider structure that this
 491      * function needs to perform under lock anyway.
 492      */
 493     if (!CRYPTO_THREAD_write_lock(prov->flag_lock))
 494         goto end;
 495     if (prov->flag_initialized) {
 496         ok = 1;
 497         goto end;
 498     }
 499
 500     /*
 501      * If the init function isn't set, it indicates that this provider is
 502      * a loadable module.
 503      */
 504     if (prov->init_function == NULL) {
 505 #ifdef FIPS_MODULE
 506         goto end;
 507 #else
 508         if (prov->module == NULL) {
 509             char *allocated_path = NULL;
 510             const char *module_path = NULL;
 511             char *merged_path = NULL;
 512             const char *load_dir = NULL;
 513             struct provider_store_st *store;
 514
 515             if ((prov->module = DSO_new()) == NULL) {
 516                 /* DSO_new() generates an error already */
 517                 goto end;
 518             }
 519
 520             if ((store = get_provider_store(prov->libctx)) == NULL
 521                     || !CRYPTO_THREAD_read_lock(store->lock))
 522                 goto end;
 523             load_dir = store->default_path;
 524             CRYPTO_THREAD_unlock(store->lock);
 525
 526             if (load_dir == NULL) {
 527                 load_dir = ossl_safe_getenv("OPENSSL_MODULES");
 528                 if (load_dir == NULL)
 529                     load_dir = MODULESDIR;
 530             }
 531
 532             DSO_ctrl(prov->module, DSO_CTRL_SET_FLAGS,
 533                      DSO_FLAG_NAME_TRANSLATION_EXT_ONLY, NULL);
 534
 535             module_path = prov->path;
 536             if (module_path == NULL)
 537                 module_path = allocated_path =
 538                     DSO_convert_filename(prov->module, prov->name);
 539             if (module_path != NULL)
 540                 merged_path = DSO_merge(prov->module, module_path, load_dir);
 541
 542             if (merged_path == NULL
 543                 || (DSO_load(prov->module, merged_path, NULL, 0)) == NULL) {
 544                 DSO_free(prov->module);
 545                 prov->module = NULL;
 546             }
 547
 548             OPENSSL_free(merged_path);
 549             OPENSSL_free(allocated_path);
 550         }
 551
 552         if (prov->module != NULL)
 553             prov->init_function = (OSSL_provider_init_fn *)
 554                 DSO_bind_func(prov->module, "OSSL_provider_init");
 555 #endif
 556     }
 557
 558     /* Call the initialise function for the provider. */
 559     if (prov->init_function == NULL
 560         || !prov->init_function((OSSL_CORE_HANDLE *)prov, core_dispatch,
 561                                 &provider_dispatch, &tmp_provctx)) {
 562         ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_INIT_FAIL,
 563                        "name=%s", prov->name);
 564 #ifndef FIPS_MODULE
 565         DSO_free(prov->module);
 566         prov->module = NULL;
 567 #endif
 568         goto end;
 569     }
 570     prov->provctx = tmp_provctx;
 571
 572     for (; provider_dispatch->function_id != 0; provider_dispatch++) {
 573         switch (provider_dispatch->function_id) {
 574         case OSSL_FUNC_PROVIDER_TEARDOWN:
 575             prov->teardown =
 576                 OSSL_FUNC_provider_teardown(provider_dispatch);
 577             break;
 578         case OSSL_FUNC_PROVIDER_GETTABLE_PARAMS:
 579             prov->gettable_params =
 580                 OSSL_FUNC_provider_gettable_params(provider_dispatch);
 581             break;
 582         case OSSL_FUNC_PROVIDER_GET_PARAMS:
 583             prov->get_params =
 584                 OSSL_FUNC_provider_get_params(provider_dispatch);
 585             break;
 586         case OSSL_FUNC_PROVIDER_SELF_TEST:
 587             prov->self_test =
 588                 OSSL_FUNC_provider_self_test(provider_dispatch);
 589             break;
 590         case OSSL_FUNC_PROVIDER_GET_CAPABILITIES:
 591             prov->get_capabilities =
 592                 OSSL_FUNC_provider_get_capabilities(provider_dispatch);
 593             break;
 594         case OSSL_FUNC_PROVIDER_QUERY_OPERATION:
 595             prov->query_operation =
 596                 OSSL_FUNC_provider_query_operation(provider_dispatch);
 597             break;
 598         case OSSL_FUNC_PROVIDER_UNQUERY_OPERATION:
 599             prov->unquery_operation =
 600                 OSSL_FUNC_provider_unquery_operation(provider_dispatch);
 601             break;
 602 #ifndef OPENSSL_NO_ERR
 603 # ifndef FIPS_MODULE
 604         case OSSL_FUNC_PROVIDER_GET_REASON_STRINGS:
 605             p_get_reason_strings =
 606                 OSSL_FUNC_provider_get_reason_strings(provider_dispatch);
 607             break;
 608 # endif
 609 #endif
 610         }
 611     }
 612
 613 #ifndef OPENSSL_NO_ERR
 614 # ifndef FIPS_MODULE
 615     if (p_get_reason_strings != NULL) {
 616         const OSSL_ITEM *reasonstrings = p_get_reason_strings(prov->provctx);
 617         size_t cnt, cnt2;
 618
 619         /*
 620          * ERR_load_strings() handles ERR_STRING_DATA rather than OSSL_ITEM,
 621          * although they are essentially the same type.
 622          * Furthermore, ERR_load_strings() patches the array's error number
 623          * with the error library number, so we need to make a copy of that
 624          * array either way.
 625          */
 626         cnt = 0;
 627         while (reasonstrings[cnt].id != 0) {
 628             if (ERR_GET_LIB(reasonstrings[cnt].id) != 0)
 629                 goto end;
 630             cnt++;
 631         }
 632         cnt++;                   /* One for the terminating item */
 633
 634         /* Allocate one extra item for the "library" name */
 635         prov->error_strings =
 636             OPENSSL_zalloc(sizeof(ERR_STRING_DATA) * (cnt + 1));
 637         if (prov->error_strings == NULL)
 638             goto end;
 639
 640         /*
 641          * Set the "library" name.
 642          */
 643         prov->error_strings[0].error = ERR_PACK(prov->error_lib, 0, 0);
 644         prov->error_strings[0].string = prov->name;
 645         /*
 646          * Copy reasonstrings item 0..cnt-1 to prov->error_trings positions
 647          * 1..cnt.
 648          */
 649         for (cnt2 = 1; cnt2 <= cnt; cnt2++) {
 650             prov->error_strings[cnt2].error = (int)reasonstrings[cnt2-1].id;
 651             prov->error_strings[cnt2].string = reasonstrings[cnt2-1].ptr;
 652         }
 653
 654         ERR_load_strings(prov->error_lib, prov->error_strings);
 655     }
 656 # endif
 657 #endif
 658
 659     /* With this flag set, this provider has become fully "loaded". */
 660     prov->flag_initialized = 1;
 661     ok = 1;
 662
 663  end:
 664     CRYPTO_THREAD_unlock(prov->flag_lock);
 665     return ok;
 666 }
 667
 668 static int provider_deactivate(OSSL_PROVIDER *prov)
 669 {
 670     int ref = 0;
 671
 672     if (!ossl_assert(prov != NULL))
 673         return 0;
 674
 675     if (CRYPTO_DOWN_REF(&prov->activatecnt, &ref, prov->activatecnt_lock) <= 0)
 676         return 0;
 677
 678     if (ref < 1) {
 679         if (!CRYPTO_THREAD_write_lock(prov->flag_lock))
 680             return 0;
 681         prov->flag_activated = 0;
 682         CRYPTO_THREAD_unlock(prov->flag_lock);
 683     }
 684
 685     /* We don't deinit here, that's done in ossl_provider_free() */
 686     return 1;
 687 }
 688
 689 static int provider_activate(OSSL_PROVIDER *prov)
 690 {
 691     int ref = 0;
 692
 693     if (CRYPTO_UP_REF(&prov->activatecnt, &ref, prov->activatecnt_lock) <= 0)
 694         return 0;
 695
 696     if (provider_init(prov)) {
 697         if (!CRYPTO_THREAD_write_lock(prov->flag_lock))
 698             return 0;
 699         prov->flag_activated = 1;
 700         CRYPTO_THREAD_unlock(prov->flag_lock);
 701
 702         return 1;
 703     }
 704
 705     provider_deactivate(prov);
 706     return 0;
 707 }
 708
 709 int ossl_provider_activate(OSSL_PROVIDER *prov, int retain_fallbacks)
 710 {
 711     if (prov == NULL)
 712         return 0;
 713     if (provider_activate(prov)) {
 714         if (!retain_fallbacks) {
 715             if (!CRYPTO_THREAD_write_lock(prov->store->lock)) {
 716                 provider_deactivate(prov);
 717                 return 0;
 718             }
 719             prov->store->use_fallbacks = 0;
 720             CRYPTO_THREAD_unlock(prov->store->lock);
 721         }
 722         return 1;
 723     }
 724     return 0;
 725 }
 726
 727 int ossl_provider_deactivate(OSSL_PROVIDER *prov)
 728 {
 729     if (prov == NULL)
 730         return 0;
 731     return provider_deactivate(prov);
 732 }
 733
 734 void *ossl_provider_ctx(const OSSL_PROVIDER *prov)
 735 {
 736     return prov->provctx;
 737 }
 738
 739 /*
 740  * This function only does something once when store->use_fallbacks == 1,
 741  * and then sets store->use_fallbacks = 0, so the second call and so on is
 742  * effectively a no-op.
 743  */
 744 static void provider_activate_fallbacks(struct provider_store_st *store)
 745 {
 746     int use_fallbacks;
 747     int num_provs;
 748     int activated_fallback_count = 0;
 749     int i;
 750
 751     if (!CRYPTO_THREAD_read_lock(store->lock))
 752         return;
 753     use_fallbacks = store->use_fallbacks;
 754     CRYPTO_THREAD_unlock(store->lock);
 755     if (!use_fallbacks)
 756         return;
 757
 758     if (!CRYPTO_THREAD_write_lock(store->lock))
 759         return;
 760     /* Check again, just in case another thread changed it */
 761     use_fallbacks = store->use_fallbacks;
 762     if (!use_fallbacks) {
 763         CRYPTO_THREAD_unlock(store->lock);
 764         return;
 765     }
 766
 767     num_provs = sk_OSSL_PROVIDER_num(store->providers);
 768     for (i = 0; i < num_provs; i++) {
 769         OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(store->providers, i);
 770
 771         if (ossl_provider_up_ref(prov)) {
 772             if (prov->flag_fallback) {
 773                 if (provider_activate(prov)) {
 774                     prov->flag_activated_as_fallback = 1;
 775                     activated_fallback_count++;
 776                 }
 777             }
 778             ossl_provider_free(prov);
 779         }
 780     }
 781
 782     /*
 783      * We assume that all fallbacks have been added to the store before
 784      * any fallback is activated.
 785      * TODO: We may have to reconsider this, IF we find ourselves adding
 786      * fallbacks after any previous fallback has been activated.
 787      */
 788     if (activated_fallback_count > 0)
 789         store->use_fallbacks = 0;
 790
 791     CRYPTO_THREAD_unlock(store->lock);
 792 }
 793
 794 int ossl_provider_doall_activated(OSSL_LIB_CTX *ctx,
 795                                   int (*cb)(OSSL_PROVIDER *provider,
 796                                             void *cbdata),
 797                                   void *cbdata)
 798 {
 799     int ret = 0, i, j;
 800     struct provider_store_st *store = get_provider_store(ctx);
 801     STACK_OF(OSSL_PROVIDER) *provs = NULL;
 802
 803 #ifndef FIPS_MODULE
 804     /*
 805      * Make sure any providers are loaded from config before we try to use
 806      * them.
 807      */
 808     OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
 809 #endif
 810
 811     if (store == NULL)
 812         return 1;
 813     provider_activate_fallbacks(store);
 814
 815     /*
 816      * Under lock, grab a copy of the provider list and up_ref each
 817      * provider so that they don't disappear underneath us.
 818      */
 819     if (!CRYPTO_THREAD_read_lock(store->lock))
 820         return 0;
 821     provs = sk_OSSL_PROVIDER_dup(store->providers);
 822     if (provs == NULL) {
 823         CRYPTO_THREAD_unlock(store->lock);
 824         return 0;
 825     }
 826     j = sk_OSSL_PROVIDER_num(provs);
 827     for (i = 0; i < j; i++)
 828         if (!ossl_provider_up_ref(sk_OSSL_PROVIDER_value(provs, i)))
 829             goto err_unlock;
 830     CRYPTO_THREAD_unlock(store->lock);
 831
 832     /*
 833      * Now, we sweep through all providers not under lock
 834      */
 835     for (j = 0; j < i; j++) {
 836         OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, j);
 837
 838         if (prov->flag_activated && !cb(prov, cbdata))
 839             goto finish;
 840     }
 841
 842     ret = 1;
 843     goto finish;
 844
 845  err_unlock:
 846     CRYPTO_THREAD_unlock(store->lock);
 847  finish:
 848     /* The pop_free call doesn't do what we want on an error condition */
 849     for (j = 0; j < i; j++)
 850         ossl_provider_free(sk_OSSL_PROVIDER_value(provs, j));
 851     sk_OSSL_PROVIDER_free(provs);
 852     return ret;
 853 }
 854
 855 int ossl_provider_available(OSSL_PROVIDER *prov)
 856 {
 857     if (prov != NULL) {
 858         provider_activate_fallbacks(prov->store);
 859
 860         return prov->flag_activated;
 861     }
 862     return 0;
 863 }
 864
 865 /* Setters of Provider Object data */
 866 int ossl_provider_set_fallback(OSSL_PROVIDER *prov)
 867 {
 868     if (prov == NULL)
 869         return 0;
 870
 871     prov->flag_fallback = 1;
 872     return 1;
 873 }
 874
 875 /* Getters of Provider Object data */
 876 const char *ossl_provider_name(const OSSL_PROVIDER *prov)
 877 {
 878     return prov->name;
 879 }
 880
 881 const DSO *ossl_provider_dso(const OSSL_PROVIDER *prov)
 882 {
 883     return prov->module;
 884 }
 885
 886 const char *ossl_provider_module_name(const OSSL_PROVIDER *prov)
 887 {
 888 #ifdef FIPS_MODULE
 889     return NULL;
 890 #else
 891     return DSO_get_filename(prov->module);
 892 #endif
 893 }
 894
 895 const char *ossl_provider_module_path(const OSSL_PROVIDER *prov)
 896 {
 897 #ifdef FIPS_MODULE
 898     return NULL;
 899 #else
 900     /* FIXME: Ensure it's a full path */
 901     return DSO_get_filename(prov->module);
 902 #endif
 903 }
 904
 905 void *ossl_provider_prov_ctx(const OSSL_PROVIDER *prov)
 906 {
 907     if (prov != NULL)
 908         return prov->provctx;
 909
 910     return NULL;
 911 }
 912
 913 OSSL_LIB_CTX *ossl_provider_libctx(const OSSL_PROVIDER *prov)
 914 {
 915     return prov != NULL ? prov->libctx : NULL;
 916 }
 917
 918 /* Wrappers around calls to the provider */
 919 void ossl_provider_teardown(const OSSL_PROVIDER *prov)
 920 {
 921     if (prov->teardown != NULL)
 922         prov->teardown(prov->provctx);
 923 }
 924
 925 const OSSL_PARAM *ossl_provider_gettable_params(const OSSL_PROVIDER *prov)
 926 {
 927     return prov->gettable_params == NULL
 928         ? NULL : prov->gettable_params(prov->provctx);
 929 }
 930
 931 int ossl_provider_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
 932 {
 933     return prov->get_params == NULL
 934         ? 0 : prov->get_params(prov->provctx, params);
 935 }
 936
 937 int ossl_provider_self_test(const OSSL_PROVIDER *prov)
 938 {
 939     int ret;
 940
 941     if (prov->self_test == NULL)
 942         return 1;
 943     ret = prov->self_test(prov->provctx);
 944     if (ret == 0)
 945         evp_method_store_flush(ossl_provider_libctx(prov));
 946     return ret;
 947 }
 948
 949 int ossl_provider_get_capabilities(const OSSL_PROVIDER *prov,
 950                                    const char *capability,
 951                                    OSSL_CALLBACK *cb,
 952                                    void *arg)
 953 {
 954     return prov->get_capabilities == NULL
 955         ? 1 : prov->get_capabilities(prov->provctx, capability, cb, arg);
 956 }
 957
 958 const OSSL_ALGORITHM *ossl_provider_query_operation(const OSSL_PROVIDER *prov,
 959                                                     int operation_id,
 960                                                     int *no_cache)
 961 {
 962     const OSSL_ALGORITHM *res;
 963
 964     if (prov->query_operation == NULL)
 965         return NULL;
 966     res = prov->query_operation(prov->provctx, operation_id, no_cache);
 967 #if defined(OPENSSL_NO_CACHED_FETCH)
 968     /* Forcing the non-caching of queries */
 969     if (no_cache != NULL)
 970         *no_cache = 1;
 971 #endif
 972     return res;
 973 }
 974
 975 void ossl_provider_unquery_operation(const OSSL_PROVIDER *prov,
 976                                      int operation_id,
 977                                      const OSSL_ALGORITHM *algs)
 978 {
 979     if (prov->unquery_operation != NULL)
 980         prov->unquery_operation(prov->provctx, operation_id, algs);
 981 }
 982
 983 int ossl_provider_set_operation_bit(OSSL_PROVIDER *provider, size_t bitnum)
 984 {
 985     size_t byte = bitnum / 8;
 986     unsigned char bit = (1 << (bitnum % 8)) & 0xFF;
 987
 988     if (!CRYPTO_THREAD_write_lock(provider->opbits_lock))
 989         return 0;
 990     if (provider->operation_bits_sz <= byte) {
 991         unsigned char *tmp = OPENSSL_realloc(provider->operation_bits,
 992                                              byte + 1);
 993
 994         if (tmp == NULL) {
 995             CRYPTO_THREAD_unlock(provider->opbits_lock);
 996             ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
 997             return 0;
 998         }
 999         provider->operation_bits = tmp;
1000         memset(provider->operation_bits + provider->operation_bits_sz,
1001                '\0', byte + 1 - provider->operation_bits_sz);
1002         provider->operation_bits_sz = byte + 1;
1003     }
1004     provider->operation_bits[byte] |= bit;
1005     CRYPTO_THREAD_unlock(provider->opbits_lock);
1006     return 1;
1007 }
1008
1009 int ossl_provider_test_operation_bit(OSSL_PROVIDER *provider, size_t bitnum,
1010                                      int *result)
1011 {
1012     size_t byte = bitnum / 8;
1013     unsigned char bit = (1 << (bitnum % 8)) & 0xFF;
1014
1015     if (!ossl_assert(result != NULL)) {
1016         ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
1017         return 0;
1018     }
1019
1020     *result = 0;
1021     if (!CRYPTO_THREAD_read_lock(provider->opbits_lock))
1022         return 0;
1023     if (provider->operation_bits_sz > byte)
1024         *result = ((provider->operation_bits[byte] & bit) != 0);
1025     CRYPTO_THREAD_unlock(provider->opbits_lock);
1026     return 1;
1027 }
1028
1029 /*-
1030  * Core functions for the provider
1031  * ===============================
1032  *
1033  * This is the set of functions that the core makes available to the provider
1034  */
1035
1036 /*
1037  * This returns a list of Provider Object parameters with their types, for
1038  * discovery.  We do not expect that many providers will use this, but one
1039  * never knows.
1040  */
1041 static const OSSL_PARAM param_types[] = {
1042     OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_VERSION, OSSL_PARAM_UTF8_PTR, NULL, 0),
1043     OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_PROV_NAME, OSSL_PARAM_UTF8_PTR,
1044                     NULL, 0),
1045 #ifndef FIPS_MODULE
1046     OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_MODULE_FILENAME, OSSL_PARAM_UTF8_PTR,
1047                     NULL, 0),
1048 #endif
1049     OSSL_PARAM_END
1050 };
1051
1052 /*
1053  * Forward declare all the functions that are provided aa dispatch.
1054  * This ensures that the compiler will complain if they aren't defined
1055  * with the correct signature.
1056  */
1057 static OSSL_FUNC_core_gettable_params_fn core_gettable_params;
1058 static OSSL_FUNC_core_get_params_fn core_get_params;
1059 static OSSL_FUNC_core_thread_start_fn core_thread_start;
1060 static OSSL_FUNC_core_get_libctx_fn core_get_libctx;
1061 #ifndef FIPS_MODULE
1062 static OSSL_FUNC_core_new_error_fn core_new_error;
1063 static OSSL_FUNC_core_set_error_debug_fn core_set_error_debug;
1064 static OSSL_FUNC_core_vset_error_fn core_vset_error;
1065 static OSSL_FUNC_core_set_error_mark_fn core_set_error_mark;
1066 static OSSL_FUNC_core_clear_last_error_mark_fn core_clear_last_error_mark;
1067 static OSSL_FUNC_core_pop_error_to_mark_fn core_pop_error_to_mark;
1068 #endif
1069
1070 static const OSSL_PARAM *core_gettable_params(const OSSL_CORE_HANDLE *handle)
1071 {
1072     return param_types;
1073 }
1074
1075 static int core_get_params(const OSSL_CORE_HANDLE *handle, OSSL_PARAM params[])
1076 {
1077     int i;
1078     OSSL_PARAM *p;
1079     /*
1080      * We created this object originally and we know it is actually an
1081      * OSSL_PROVIDER *, so the cast is safe
1082      */
1083     OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1084
1085     if ((p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_CORE_VERSION)) != NULL)
1086         OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR);
1087     if ((p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_CORE_PROV_NAME)) != NULL)
1088         OSSL_PARAM_set_utf8_ptr(p, prov->name);
1089
1090 #ifndef FIPS_MODULE
1091     if ((p = OSSL_PARAM_locate(params,
1092                                OSSL_PROV_PARAM_CORE_MODULE_FILENAME)) != NULL)
1093         OSSL_PARAM_set_utf8_ptr(p, ossl_provider_module_path(prov));
1094 #endif
1095
1096     if (prov->parameters == NULL)
1097         return 1;
1098
1099     for (i = 0; i < sk_INFOPAIR_num(prov->parameters); i++) {
1100         INFOPAIR *pair = sk_INFOPAIR_value(prov->parameters, i);
1101
1102         if ((p = OSSL_PARAM_locate(params, pair->name)) != NULL)
1103             OSSL_PARAM_set_utf8_ptr(p, pair->value);
1104     }
1105     return 1;
1106 }
1107
1108 static OPENSSL_CORE_CTX *core_get_libctx(const OSSL_CORE_HANDLE *handle)
1109 {
1110     /*
1111      * We created this object originally and we know it is actually an
1112      * OSSL_PROVIDER *, so the cast is safe
1113      */
1114     OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1115
1116     /*
1117      * Using ossl_provider_libctx would be wrong as that returns
1118      * NULL for |prov| == NULL and NULL libctx has a special meaning
1119      * that does not apply here. Here |prov| == NULL can happen only in
1120      * case of a coding error.
1121      */
1122     assert(prov != NULL);
1123     return (OPENSSL_CORE_CTX *)prov->libctx;
1124 }
1125
1126 static int core_thread_start(const OSSL_CORE_HANDLE *handle,
1127                              OSSL_thread_stop_handler_fn handfn)
1128 {
1129     /*
1130      * We created this object originally and we know it is actually an
1131      * OSSL_PROVIDER *, so the cast is safe
1132      */
1133     OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1134
1135     return ossl_init_thread_start(prov, prov->provctx, handfn);
1136 }
1137
1138 /*
1139  * The FIPS module inner provider doesn't implement these.  They aren't
1140  * needed there, since the FIPS module upcalls are always the outer provider
1141  * ones.
1142  */
1143 #ifndef FIPS_MODULE
1144 /*
1145  * These error functions should use |handle| to select the proper
1146  * library context to report in the correct error stack if error
1147  * stacks become tied to the library context.
1148  * We cannot currently do that since there's no support for it in the
1149  * ERR subsystem.
1150  */
1151 static void core_new_error(const OSSL_CORE_HANDLE *handle)
1152 {
1153     ERR_new();
1154 }
1155
1156 static void core_set_error_debug(const OSSL_CORE_HANDLE *handle,
1157                                  const char *file, int line, const char *func)
1158 {
1159     ERR_set_debug(file, line, func);
1160 }
1161
1162 static void core_vset_error(const OSSL_CORE_HANDLE *handle,
1163                             uint32_t reason, const char *fmt, va_list args)
1164 {
1165     /*
1166      * We created this object originally and we know it is actually an
1167      * OSSL_PROVIDER *, so the cast is safe
1168      */
1169     OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1170
1171     /*
1172      * If the uppermost 8 bits are non-zero, it's an OpenSSL library
1173      * error and will be treated as such.  Otherwise, it's a new style
1174      * provider error and will be treated as such.
1175      */
1176     if (ERR_GET_LIB(reason) != 0) {
1177         ERR_vset_error(ERR_GET_LIB(reason), ERR_GET_REASON(reason), fmt, args);
1178     } else {
1179         ERR_vset_error(prov->error_lib, (int)reason, fmt, args);
1180     }
1181 }
1182
1183 static int core_set_error_mark(const OSSL_CORE_HANDLE *handle)
1184 {
1185     return ERR_set_mark();
1186 }
1187
1188 static int core_clear_last_error_mark(const OSSL_CORE_HANDLE *handle)
1189 {
1190     return ERR_clear_last_mark();
1191 }
1192
1193 static int core_pop_error_to_mark(const OSSL_CORE_HANDLE *handle)
1194 {
1195     return ERR_pop_to_mark();
1196 }
1197 #endif /* FIPS_MODULE */
1198
1199 /*
1200  * Functions provided by the core.
1201  */
1202 static const OSSL_DISPATCH core_dispatch_[] = {
1203     { OSSL_FUNC_CORE_GETTABLE_PARAMS, (void (*)(void))core_gettable_params },
1204     { OSSL_FUNC_CORE_GET_PARAMS, (void (*)(void))core_get_params },
1205     { OSSL_FUNC_CORE_GET_LIBCTX, (void (*)(void))core_get_libctx },
1206     { OSSL_FUNC_CORE_THREAD_START, (void (*)(void))core_thread_start },
1207 #ifndef FIPS_MODULE
1208     { OSSL_FUNC_CORE_NEW_ERROR, (void (*)(void))core_new_error },
1209     { OSSL_FUNC_CORE_SET_ERROR_DEBUG, (void (*)(void))core_set_error_debug },
1210     { OSSL_FUNC_CORE_VSET_ERROR, (void (*)(void))core_vset_error },
1211     { OSSL_FUNC_CORE_SET_ERROR_MARK, (void (*)(void))core_set_error_mark },
1212     { OSSL_FUNC_CORE_CLEAR_LAST_ERROR_MARK,
1213       (void (*)(void))core_clear_last_error_mark },
1214     { OSSL_FUNC_CORE_POP_ERROR_TO_MARK, (void (*)(void))core_pop_error_to_mark },
1215     { OSSL_FUNC_BIO_NEW_FILE, (void (*)(void))ossl_core_bio_new_file },
1216     { OSSL_FUNC_BIO_NEW_MEMBUF, (void (*)(void))ossl_core_bio_new_mem_buf },
1217     { OSSL_FUNC_BIO_READ_EX, (void (*)(void))ossl_core_bio_read_ex },
1218     { OSSL_FUNC_BIO_WRITE_EX, (void (*)(void))ossl_core_bio_write_ex },
1219     { OSSL_FUNC_BIO_GETS, (void (*)(void))ossl_core_bio_gets },
1220     { OSSL_FUNC_BIO_PUTS, (void (*)(void))ossl_core_bio_puts },
1221     { OSSL_FUNC_BIO_CTRL, (void (*)(void))ossl_core_bio_ctrl },
1222     { OSSL_FUNC_BIO_UP_REF, (void (*)(void))ossl_core_bio_up_ref },
1223     { OSSL_FUNC_BIO_FREE, (void (*)(void))ossl_core_bio_free },
1224     { OSSL_FUNC_BIO_VPRINTF, (void (*)(void))ossl_core_bio_vprintf },
1225     { OSSL_FUNC_BIO_VSNPRINTF, (void (*)(void))BIO_vsnprintf },
1226     { OSSL_FUNC_SELF_TEST_CB, (void (*)(void))OSSL_SELF_TEST_get_callback },
1227     { OSSL_FUNC_GET_ENTROPY, (void (*)(void))ossl_rand_get_entropy },
1228     { OSSL_FUNC_CLEANUP_ENTROPY, (void (*)(void))ossl_rand_cleanup_entropy },
1229     { OSSL_FUNC_GET_NONCE, (void (*)(void))ossl_rand_get_nonce },
1230     { OSSL_FUNC_CLEANUP_NONCE, (void (*)(void))ossl_rand_cleanup_nonce },
1231 #endif
1232     { OSSL_FUNC_CRYPTO_MALLOC, (void (*)(void))CRYPTO_malloc },
1233     { OSSL_FUNC_CRYPTO_ZALLOC, (void (*)(void))CRYPTO_zalloc },
1234     { OSSL_FUNC_CRYPTO_FREE, (void (*)(void))CRYPTO_free },
1235     { OSSL_FUNC_CRYPTO_CLEAR_FREE, (void (*)(void))CRYPTO_clear_free },
1236     { OSSL_FUNC_CRYPTO_REALLOC, (void (*)(void))CRYPTO_realloc },
1237     { OSSL_FUNC_CRYPTO_CLEAR_REALLOC, (void (*)(void))CRYPTO_clear_realloc },
1238     { OSSL_FUNC_CRYPTO_SECURE_MALLOC, (void (*)(void))CRYPTO_secure_malloc },
1239     { OSSL_FUNC_CRYPTO_SECURE_ZALLOC, (void (*)(void))CRYPTO_secure_zalloc },
1240     { OSSL_FUNC_CRYPTO_SECURE_FREE, (void (*)(void))CRYPTO_secure_free },
1241     { OSSL_FUNC_CRYPTO_SECURE_CLEAR_FREE,
1242         (void (*)(void))CRYPTO_secure_clear_free },
1243     { OSSL_FUNC_CRYPTO_SECURE_ALLOCATED,
1244         (void (*)(void))CRYPTO_secure_allocated },
1245     { OSSL_FUNC_OPENSSL_CLEANSE, (void (*)(void))OPENSSL_cleanse },
1246
1247     { 0, NULL }
1248 };
1249 static const OSSL_DISPATCH *core_dispatch = core_dispatch_;