crypto/provider_core.c

   1 /*
   2  * Copyright 2019 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 <openssl/core.h>
  11 #include <openssl/core_numbers.h>
  12 #include <openssl/params.h>
  13 #include <openssl/opensslv.h>
  14 #include "internal/cryptlib_int.h"
  15 #include "internal/nelem.h"
  16 #include "internal/thread_once.h"
  17 #include "internal/provider.h"
  18 #include "internal/refcount.h"
  19 #include "provider_local.h"
  20
  21 static OSSL_PROVIDER *provider_new(const char *name,
  22                                    OSSL_provider_init_fn *init_function);
  23
  24 /*-
  25  * Provider Object structure
  26  * =========================
  27  */
  28
  29 typedef struct {
  30     char *name;
  31     char *value;
  32 } INFOPAIR;
  33 DEFINE_STACK_OF(INFOPAIR)
  34
  35 struct provider_store_st;        /* Forward declaration */
  36
  37 struct ossl_provider_st {
  38     /* Flag bits */
  39     unsigned int flag_initialized:1;
  40     unsigned int flag_fallback:1;
  41
  42     /* OpenSSL library side data */
  43     CRYPTO_REF_COUNT refcnt;
  44     CRYPTO_RWLOCK *refcnt_lock;  /* For the ref counter */
  45     char *name;
  46     char *path;
  47     DSO *module;
  48     OSSL_provider_init_fn *init_function;
  49     STACK_OF(INFOPAIR) *parameters;
  50     OPENSSL_CTX *libctx; /* The library context this instance is in */
  51     struct provider_store_st *store; /* The store this instance belongs to */
  52
  53     /* Provider side functions */
  54     OSSL_provider_teardown_fn *teardown;
  55     OSSL_provider_get_param_types_fn *get_param_types;
  56     OSSL_provider_get_params_fn *get_params;
  57     OSSL_provider_query_operation_fn *query_operation;
  58
  59     /* Provider side data */
  60     void *provctx;
  61 };
  62 DEFINE_STACK_OF(OSSL_PROVIDER)
  63
  64 static int ossl_provider_cmp(const OSSL_PROVIDER * const *a,
  65                              const OSSL_PROVIDER * const *b)
  66 {
  67     return strcmp((*a)->name, (*b)->name);
  68 }
  69
  70 /*-
  71  * Provider Object store
  72  * =====================
  73  *
  74  * The Provider Object store is a library context object, and therefore needs
  75  * an index.
  76  */
  77
  78 struct provider_store_st {
  79     STACK_OF(OSSL_PROVIDER) *providers;
  80     CRYPTO_RWLOCK *lock;
  81     unsigned int use_fallbacks:1;
  82 };
  83
  84 static void provider_store_free(void *vstore)
  85 {
  86     struct provider_store_st *store = vstore;
  87
  88     if (store == NULL)
  89         return;
  90     sk_OSSL_PROVIDER_pop_free(store->providers, ossl_provider_free);
  91     CRYPTO_THREAD_lock_free(store->lock);
  92     OPENSSL_free(store);
  93 }
  94
  95 static void *provider_store_new(OPENSSL_CTX *ctx)
  96 {
  97     struct provider_store_st *store = OPENSSL_zalloc(sizeof(*store));
  98     const struct predefined_providers_st *p = NULL;
  99
 100     if (store == NULL
 101         || (store->providers = sk_OSSL_PROVIDER_new(ossl_provider_cmp)) == NULL
 102         || (store->lock = CRYPTO_THREAD_lock_new()) == NULL) {
 103         provider_store_free(store);
 104         return NULL;
 105     }
 106     store->use_fallbacks = 1;
 107
 108     for (p = predefined_providers; p->name != NULL; p++) {
 109         OSSL_PROVIDER *prov = NULL;
 110
 111         /*
 112          * We use the internal constructor directly here,
 113          * otherwise we get a call loop
 114          */
 115         prov = provider_new(p->name, p->init);
 116
 117         if (prov == NULL
 118             || sk_OSSL_PROVIDER_push(store->providers, prov) == 0) {
 119             ossl_provider_free(prov);
 120             provider_store_free(store);
 121             CRYPTOerr(CRYPTO_F_PROVIDER_STORE_NEW, ERR_R_INTERNAL_ERROR);
 122             return NULL;
 123         }
 124         prov->libctx = ctx;
 125         prov->store = store;
 126         if(p->is_fallback)
 127             ossl_provider_set_fallback(prov);
 128     }
 129
 130     return store;
 131 }
 132
 133 static const OPENSSL_CTX_METHOD provider_store_method = {
 134     provider_store_new,
 135     provider_store_free,
 136 };
 137
 138 static struct provider_store_st *get_provider_store(OPENSSL_CTX *libctx)
 139 {
 140     struct provider_store_st *store = NULL;
 141
 142     store = openssl_ctx_get_data(libctx, OPENSSL_CTX_PROVIDER_STORE_INDEX,
 143                                  &provider_store_method);
 144     if (store == NULL)
 145         CRYPTOerr(CRYPTO_F_GET_PROVIDER_STORE, ERR_R_INTERNAL_ERROR);
 146     return store;
 147 }
 148
 149 OSSL_PROVIDER *ossl_provider_find(OPENSSL_CTX *libctx, const char *name)
 150 {
 151     struct provider_store_st *store = NULL;
 152     OSSL_PROVIDER *prov = NULL;
 153
 154     if ((store = get_provider_store(libctx)) != NULL) {
 155         OSSL_PROVIDER tmpl = { 0, };
 156         int i;
 157
 158         tmpl.name = (char *)name;
 159         CRYPTO_THREAD_write_lock(store->lock);
 160         if ((i = sk_OSSL_PROVIDER_find(store->providers, &tmpl)) == -1
 161             || (prov = sk_OSSL_PROVIDER_value(store->providers, i)) == NULL
 162             || !ossl_provider_up_ref(prov))
 163             prov = NULL;
 164         CRYPTO_THREAD_unlock(store->lock);
 165     }
 166
 167     return prov;
 168 }
 169
 170 /*-
 171  * Provider Object methods
 172  * =======================
 173  */
 174
 175 static OSSL_PROVIDER *provider_new(const char *name,
 176                                    OSSL_provider_init_fn *init_function)
 177 {
 178     OSSL_PROVIDER *prov = NULL;
 179
 180     if ((prov = OPENSSL_zalloc(sizeof(*prov))) == NULL
 181 #ifndef HAVE_ATOMICS
 182         || (prov->refcnt_lock = CRYPTO_THREAD_lock_new()) == NULL
 183 #endif
 184         || !ossl_provider_up_ref(prov) /* +1 One reference to be returned */
 185         || (prov->name = OPENSSL_strdup(name)) == NULL) {
 186         ossl_provider_free(prov);
 187         CRYPTOerr(CRYPTO_F_PROVIDER_NEW, ERR_R_MALLOC_FAILURE);
 188         return NULL;
 189     }
 190
 191     prov->init_function = init_function;
 192     return prov;
 193 }
 194
 195 int ossl_provider_up_ref(OSSL_PROVIDER *prov)
 196 {
 197     int ref = 0;
 198
 199     if (CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock) <= 0)
 200         return 0;
 201     return ref;
 202 }
 203
 204 OSSL_PROVIDER *ossl_provider_new(OPENSSL_CTX *libctx, const char *name,
 205                                  OSSL_provider_init_fn *init_function)
 206 {
 207     struct provider_store_st *store = NULL;
 208     OSSL_PROVIDER *prov = NULL;
 209
 210     if ((store = get_provider_store(libctx)) == NULL)
 211         return NULL;
 212
 213     if ((prov = ossl_provider_find(libctx, name)) != NULL) { /* refcount +1 */
 214         ossl_provider_free(prov); /* refcount -1 */
 215         CRYPTOerr(CRYPTO_F_OSSL_PROVIDER_NEW,
 216                   CRYPTO_R_PROVIDER_ALREADY_EXISTS);
 217         ERR_add_error_data(2, "name=", name);
 218         return NULL;
 219     }
 220
 221     /* provider_new() generates an error, so no need here */
 222     if ((prov = provider_new(name, init_function)) == NULL)
 223         return NULL;
 224
 225     CRYPTO_THREAD_write_lock(store->lock);
 226     if (!ossl_provider_up_ref(prov)) { /* +1 One reference for the store */
 227         ossl_provider_free(prov); /* -1 Reference that was to be returned */
 228         prov = NULL;
 229     } else if (sk_OSSL_PROVIDER_push(store->providers, prov) == 0) {
 230         ossl_provider_free(prov); /* -1 Store reference */
 231         ossl_provider_free(prov); /* -1 Reference that was to be returned */
 232         prov = NULL;
 233     } else {
 234         prov->libctx = libctx;
 235         prov->store = store;
 236     }
 237     CRYPTO_THREAD_unlock(store->lock);
 238
 239     if (prov == NULL)
 240         CRYPTOerr(CRYPTO_F_OSSL_PROVIDER_NEW, ERR_R_MALLOC_FAILURE);
 241
 242     /*
 243      * At this point, the provider is only partially "loaded".  To be
 244      * fully "loaded", ossl_provider_activate() must also be called.
 245      */
 246
 247     return prov;
 248 }
 249
 250 static void free_infopair(INFOPAIR *pair)
 251 {
 252     OPENSSL_free(pair->name);
 253     OPENSSL_free(pair->value);
 254     OPENSSL_free(pair);
 255 }
 256
 257 void ossl_provider_free(OSSL_PROVIDER *prov)
 258 {
 259     if (prov != NULL) {
 260         int ref = 0;
 261
 262         CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
 263
 264         /*
 265          * When the refcount drops below two, the store is the only
 266          * possible reference, or it has already been taken away from
 267          * the store (this may happen if a provider was activated
 268          * because it's a fallback, but isn't currently used)
 269          * When that happens, the provider is inactivated.
 270          */
 271         if (ref < 2 && prov->flag_initialized) {
 272 #ifndef FIPS_MODE
 273             ossl_init_thread_deregister(prov);
 274 #endif
 275             if (prov->teardown != NULL)
 276                 prov->teardown(prov->provctx);
 277             prov->flag_initialized = 0;
 278         }
 279
 280         /*
 281          * When the refcount drops to zero, it has been taken out of
 282          * the store.  All we have to do here is clean it out.
 283          */
 284         if (ref == 0) {
 285 #ifndef FIPS_MODE
 286             DSO_free(prov->module);
 287 #endif
 288             OPENSSL_free(prov->name);
 289             OPENSSL_free(prov->path);
 290             sk_INFOPAIR_pop_free(prov->parameters, free_infopair);
 291 #ifndef HAVE_ATOMICS
 292             CRYPTO_THREAD_lock_free(prov->refcnt_lock);
 293 #endif
 294             OPENSSL_free(prov);
 295         }
 296     }
 297 }
 298
 299 /* Setters */
 300 int ossl_provider_set_module_path(OSSL_PROVIDER *prov, const char *module_path)
 301 {
 302     OPENSSL_free(prov->path);
 303     if (module_path == NULL)
 304         return 1;
 305     if ((prov->path = OPENSSL_strdup(module_path)) != NULL)
 306         return 1;
 307     CRYPTOerr(CRYPTO_F_OSSL_PROVIDER_SET_MODULE_PATH, ERR_R_MALLOC_FAILURE);
 308     return 0;
 309 }
 310
 311 int ossl_provider_add_parameter(OSSL_PROVIDER *prov,
 312                                 const char *name, const char *value)
 313 {
 314     INFOPAIR *pair = NULL;
 315
 316     if ((pair = OPENSSL_zalloc(sizeof(*pair))) != NULL
 317         && (prov->parameters != NULL
 318             || (prov->parameters = sk_INFOPAIR_new_null()) != NULL)
 319         && (pair->name = OPENSSL_strdup(name)) != NULL
 320         && (pair->value = OPENSSL_strdup(value)) != NULL
 321         && sk_INFOPAIR_push(prov->parameters, pair) > 0)
 322         return 1;
 323
 324     if (pair != NULL) {
 325         OPENSSL_free(pair->name);
 326         OPENSSL_free(pair->value);
 327         OPENSSL_free(pair);
 328     }
 329     CRYPTOerr(CRYPTO_F_OSSL_PROVIDER_ADD_PARAMETER, ERR_R_MALLOC_FAILURE);
 330     return 0;
 331 }
 332
 333 /*
 334  * Provider activation.
 335  *
 336  * What "activation" means depends on the provider form; for built in
 337  * providers (in the library or the application alike), the provider
 338  * can already be considered to be loaded, all that's needed is to
 339  * initialize it.  However, for dynamically loadable provider modules,
 340  * we must first load that module.
 341  *
 342  * Built in modules are distinguished from dynamically loaded modules
 343  * with an already assigned init function.
 344  */
 345 static const OSSL_DISPATCH *core_dispatch; /* Define further down */
 346
 347 /*
 348  * Internal version that doesn't affect the store flags, and thereby avoid
 349  * locking.  Direct callers must remember to set the store flags when
 350  * appropriate.
 351  */
 352 static int provider_activate(OSSL_PROVIDER *prov)
 353 {
 354     const OSSL_DISPATCH *provider_dispatch = NULL;
 355
 356     if (prov->flag_initialized)
 357         return 1;
 358
 359     /*
 360      * If the init function isn't set, it indicates that this provider is
 361      * a loadable module.
 362      */
 363     if (prov->init_function == NULL) {
 364 #ifdef FIPS_MODE
 365         return 0;
 366 #else
 367         if (prov->module == NULL) {
 368             char *allocated_path = NULL;
 369             const char *module_path = NULL;
 370             char *merged_path = NULL;
 371             const char *load_dir = ossl_safe_getenv("OPENSSL_MODULES");
 372
 373             if ((prov->module = DSO_new()) == NULL) {
 374                 /* DSO_new() generates an error already */
 375                 return 0;
 376             }
 377
 378             if (load_dir == NULL)
 379                 load_dir = MODULESDIR;
 380
 381             DSO_ctrl(prov->module, DSO_CTRL_SET_FLAGS,
 382                      DSO_FLAG_NAME_TRANSLATION_EXT_ONLY, NULL);
 383
 384             module_path = prov->path;
 385             if (module_path == NULL)
 386                 module_path = allocated_path =
 387                     DSO_convert_filename(prov->module, prov->name);
 388             if (module_path != NULL)
 389                 merged_path = DSO_merge(prov->module, module_path, load_dir);
 390
 391             if (merged_path == NULL
 392                 || (DSO_load(prov->module, merged_path, NULL, 0)) == NULL) {
 393                 DSO_free(prov->module);
 394                 prov->module = NULL;
 395             }
 396
 397             OPENSSL_free(merged_path);
 398             OPENSSL_free(allocated_path);
 399         }
 400
 401         if (prov->module != NULL)
 402             prov->init_function = (OSSL_provider_init_fn *)
 403                 DSO_bind_func(prov->module, "OSSL_provider_init");
 404 #endif
 405     }
 406
 407     /* Call the initialise function for the provider. */
 408     if (prov->init_function == NULL
 409         || !prov->init_function(prov, core_dispatch, &provider_dispatch,
 410                                 &prov->provctx)) {
 411         CRYPTOerr(CRYPTO_F_PROVIDER_ACTIVATE, ERR_R_INIT_FAIL);
 412         ERR_add_error_data(2, "name=", prov->name);
 413 #ifndef FIPS_MODE
 414         DSO_free(prov->module);
 415         prov->module = NULL;
 416 #endif
 417         return 0;
 418     }
 419
 420     for (; provider_dispatch->function_id != 0; provider_dispatch++) {
 421         switch (provider_dispatch->function_id) {
 422         case OSSL_FUNC_PROVIDER_TEARDOWN:
 423             prov->teardown =
 424                 OSSL_get_provider_teardown(provider_dispatch);
 425             break;
 426         case OSSL_FUNC_PROVIDER_GET_PARAM_TYPES:
 427             prov->get_param_types =
 428                 OSSL_get_provider_get_param_types(provider_dispatch);
 429             break;
 430         case OSSL_FUNC_PROVIDER_GET_PARAMS:
 431             prov->get_params =
 432                 OSSL_get_provider_get_params(provider_dispatch);
 433             break;
 434         case OSSL_FUNC_PROVIDER_QUERY_OPERATION:
 435             prov->query_operation =
 436                 OSSL_get_provider_query_operation(provider_dispatch);
 437             break;
 438         }
 439     }
 440
 441     /* With this flag set, this provider has become fully "loaded". */
 442     prov->flag_initialized = 1;
 443
 444     return 1;
 445 }
 446
 447 int ossl_provider_activate(OSSL_PROVIDER *prov)
 448 {
 449     if (provider_activate(prov)) {
 450         CRYPTO_THREAD_write_lock(prov->store->lock);
 451         prov->store->use_fallbacks = 0;
 452         CRYPTO_THREAD_unlock(prov->store->lock);
 453         return 1;
 454     }
 455
 456     return 0;
 457 }
 458
 459 void *ossl_provider_ctx(const OSSL_PROVIDER *prov)
 460 {
 461     return prov->provctx;
 462 }
 463
 464
 465 static int provider_forall_loaded(struct provider_store_st *store,
 466                                   int *found_activated,
 467                                   int (*cb)(OSSL_PROVIDER *provider,
 468                                             void *cbdata),
 469                                   void *cbdata)
 470 {
 471     int i;
 472     int ret = 1;
 473     int num_provs = sk_OSSL_PROVIDER_num(store->providers);
 474
 475     if (found_activated != NULL)
 476         *found_activated = 0;
 477     for (i = 0; i < num_provs; i++) {
 478         OSSL_PROVIDER *prov =
 479             sk_OSSL_PROVIDER_value(store->providers, i);
 480
 481         if (prov->flag_initialized) {
 482             if (found_activated != NULL)
 483                 *found_activated = 1;
 484             if (!(ret = cb(prov, cbdata)))
 485                 break;
 486         }
 487     }
 488
 489     return ret;
 490 }
 491
 492 int ossl_provider_forall_loaded(OPENSSL_CTX *ctx,
 493                                 int (*cb)(OSSL_PROVIDER *provider,
 494                                           void *cbdata),
 495                                 void *cbdata)
 496 {
 497     int ret = 1;
 498     int i;
 499     struct provider_store_st *store = get_provider_store(ctx);
 500
 501     if (store != NULL) {
 502         int found_activated = 0;
 503
 504         CRYPTO_THREAD_read_lock(store->lock);
 505         ret = provider_forall_loaded(store, &found_activated, cb, cbdata);
 506
 507         /*
 508          * If there's nothing activated ever in this store, try to activate
 509          * all fallbacks.
 510          */
 511         if (!found_activated && store->use_fallbacks) {
 512             int num_provs = sk_OSSL_PROVIDER_num(store->providers);
 513             int activated_fallback_count = 0;
 514
 515             for (i = 0; i < num_provs; i++) {
 516                 OSSL_PROVIDER *prov =
 517                     sk_OSSL_PROVIDER_value(store->providers, i);
 518
 519                 /*
 520                  * Note that we don't care if the activation succeeds or
 521                  * not.  If it doesn't succeed, then the next loop will
 522                  * fail anyway.
 523                  */
 524                 if (prov->flag_fallback) {
 525                     activated_fallback_count++;
 526                     provider_activate(prov);
 527                 }
 528             }
 529
 530             if (activated_fallback_count > 0) {
 531                 /*
 532                  * We assume that all fallbacks have been added to the store
 533                  * before any fallback is activated.
 534                  * TODO: We may have to reconsider this, IF we find ourselves
 535                  * adding fallbacks after any previous fallback has been
 536                  * activated.
 537                  */
 538                 store->use_fallbacks = 0;
 539
 540                 /*
 541                  * Now that we've activated available fallbacks, try a
 542                  * second sweep
 543                  */
 544                 ret = provider_forall_loaded(store, NULL, cb, cbdata);
 545             }
 546         }
 547         CRYPTO_THREAD_unlock(store->lock);
 548     }
 549
 550     return ret;
 551 }
 552
 553 /* Setters of Provider Object data */
 554 int ossl_provider_set_fallback(OSSL_PROVIDER *prov)
 555 {
 556     if (prov == NULL)
 557         return 0;
 558
 559     prov->flag_fallback = 1;
 560     return 1;
 561 }
 562
 563 /* Getters of Provider Object data */
 564 const char *ossl_provider_name(const OSSL_PROVIDER *prov)
 565 {
 566     return prov->name;
 567 }
 568
 569 const DSO *ossl_provider_dso(const OSSL_PROVIDER *prov)
 570 {
 571     return prov->module;
 572 }
 573
 574 const char *ossl_provider_module_name(const OSSL_PROVIDER *prov)
 575 {
 576 #ifdef FIPS_MODE
 577     return NULL;
 578 #else
 579     return DSO_get_filename(prov->module);
 580 #endif
 581 }
 582
 583 const char *ossl_provider_module_path(const OSSL_PROVIDER *prov)
 584 {
 585 #ifdef FIPS_MODE
 586     return NULL;
 587 #else
 588     /* FIXME: Ensure it's a full path */
 589     return DSO_get_filename(prov->module);
 590 #endif
 591 }
 592
 593 /* Wrappers around calls to the provider */
 594 void ossl_provider_teardown(const OSSL_PROVIDER *prov)
 595 {
 596     if (prov->teardown != NULL)
 597         prov->teardown(prov->provctx);
 598 }
 599
 600 const OSSL_ITEM *ossl_provider_get_param_types(const OSSL_PROVIDER *prov)
 601 {
 602     return prov->get_param_types == NULL
 603         ? NULL : prov->get_param_types(prov->provctx);
 604 }
 605
 606 int ossl_provider_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
 607 {
 608     return prov->get_params == NULL
 609         ? 0 : prov->get_params(prov->provctx, params);
 610 }
 611
 612
 613 const OSSL_ALGORITHM *ossl_provider_query_operation(const OSSL_PROVIDER *prov,
 614                                                     int operation_id,
 615                                                     int *no_cache)
 616 {
 617     return prov->query_operation(prov->provctx, operation_id, no_cache);
 618 }
 619
 620 /*-
 621  * Core functions for the provider
 622  * ===============================
 623  *
 624  * This is the set of functions that the core makes available to the provider
 625  */
 626
 627 /*
 628  * This returns a list of Provider Object parameters with their types, for
 629  * discovery.  We do not expect that many providers will use this, but one
 630  * never knows.
 631  */
 632 static const OSSL_ITEM param_types[] = {
 633     { OSSL_PARAM_UTF8_PTR, "openssl-version" },
 634     { OSSL_PARAM_UTF8_PTR, "provider-name" },
 635     { 0, NULL }
 636 };
 637
 638 static const OSSL_ITEM *core_get_param_types(const OSSL_PROVIDER *prov)
 639 {
 640     return param_types;
 641 }
 642
 643 static int core_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
 644 {
 645     int i;
 646     OSSL_PARAM *p;
 647
 648     if ((p = OSSL_PARAM_locate(params, "openssl-version")) != NULL)
 649         OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR);
 650     if ((p = OSSL_PARAM_locate(params, "provider-name")) != NULL)
 651         OSSL_PARAM_set_utf8_ptr(p, prov->name);
 652
 653     if (prov->parameters == NULL)
 654         return 1;
 655
 656     for (i = 0; i < sk_INFOPAIR_num(prov->parameters); i++) {
 657         INFOPAIR *pair = sk_INFOPAIR_value(prov->parameters, i);
 658
 659         if ((p = OSSL_PARAM_locate(params, pair->name)) != NULL)
 660             OSSL_PARAM_set_utf8_ptr(p, pair->value);
 661     }
 662
 663     return 1;
 664 }
 665
 666 static OSSL_core_get_library_context_fn core_get_libctx; /* Check */
 667 static OPENSSL_CTX *core_get_libctx(const OSSL_PROVIDER *prov)
 668 {
 669     return prov->libctx;
 670 }
 671
 672 static int core_thread_start(const OSSL_PROVIDER *prov,
 673                              OSSL_thread_stop_handler_fn handfn)
 674 {
 675     return ossl_init_thread_start(prov, prov->provctx, handfn);
 676 }
 677
 678 static const OSSL_DISPATCH core_dispatch_[] = {
 679     { OSSL_FUNC_CORE_GET_PARAM_TYPES, (void (*)(void))core_get_param_types },
 680     { OSSL_FUNC_CORE_GET_PARAMS, (void (*)(void))core_get_params },
 681     { OSSL_FUNC_CORE_GET_LIBRARY_CONTEXT, (void (*)(void))core_get_libctx },
 682     { OSSL_FUNC_CORE_THREAD_START, (void (*)(void))core_thread_start },
 683     { OSSL_FUNC_CORE_PUT_ERROR, (void (*)(void))ERR_put_error },
 684     { OSSL_FUNC_CORE_ADD_ERROR_VDATA, (void (*)(void))ERR_add_error_vdata },
 685     { 0, NULL }
 686 };
 687 static const OSSL_DISPATCH *core_dispatch = core_dispatch_;