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/core_names.h>
  13 #include <openssl/params.h>
  14 #include <openssl/opensslv.h>
  15 #include "crypto/cryptlib.h"
  16 #include "internal/nelem.h"
  17 #include "internal/thread_once.h"
  18 #include "internal/provider.h"
  19 #include "internal/refcount.h"
  20 #include "provider_local.h"
  21 #ifndef FIPS_MODE
  22 # include <openssl/self_test.h>
  23 #endif
  24
  25 static OSSL_PROVIDER *provider_new(const char *name,
  26                                    OSSL_provider_init_fn *init_function);
  27
  28 /*-
  29  * Provider Object structure
  30  * =========================
  31  */
  32
  33 typedef struct {
  34     char *name;
  35     char *value;
  36 } INFOPAIR;
  37 DEFINE_STACK_OF(INFOPAIR)
  38
  39 struct provider_store_st;        /* Forward declaration */
  40
  41 struct ossl_provider_st {
  42     /* Flag bits */
  43     unsigned int flag_initialized:1;
  44     unsigned int flag_fallback:1;
  45
  46     /* OpenSSL library side data */
  47     CRYPTO_REF_COUNT refcnt;
  48     CRYPTO_RWLOCK *refcnt_lock;  /* For the ref counter */
  49     char *name;
  50     char *path;
  51     DSO *module;
  52     OSSL_provider_init_fn *init_function;
  53     STACK_OF(INFOPAIR) *parameters;
  54     OPENSSL_CTX *libctx; /* The library context this instance is in */
  55     struct provider_store_st *store; /* The store this instance belongs to */
  56 #ifndef FIPS_MODE
  57     /*
  58      * In the FIPS module inner provider, this isn't needed, since the
  59      * error upcalls are always direct calls to the outer provider.
  60      */
  61     int error_lib;     /* ERR library number, one for each provider */
  62 # ifndef OPENSSL_NO_ERR
  63     ERR_STRING_DATA *error_strings; /* Copy of what the provider gives us */
  64 # endif
  65 #endif
  66
  67     /* Provider side functions */
  68     OSSL_provider_teardown_fn *teardown;
  69     OSSL_provider_gettable_params_fn *gettable_params;
  70     OSSL_provider_get_params_fn *get_params;
  71     OSSL_provider_query_operation_fn *query_operation;
  72
  73     /* Provider side data */
  74     void *provctx;
  75 };
  76 DEFINE_STACK_OF(OSSL_PROVIDER)
  77
  78 static int ossl_provider_cmp(const OSSL_PROVIDER * const *a,
  79                              const OSSL_PROVIDER * const *b)
  80 {
  81     return strcmp((*a)->name, (*b)->name);
  82 }
  83
  84 /*-
  85  * Provider Object store
  86  * =====================
  87  *
  88  * The Provider Object store is a library context object, and therefore needs
  89  * an index.
  90  */
  91
  92 struct provider_store_st {
  93     STACK_OF(OSSL_PROVIDER) *providers;
  94     CRYPTO_RWLOCK *lock;
  95     unsigned int use_fallbacks:1;
  96 };
  97
  98 static void provider_store_free(void *vstore)
  99 {
 100     struct provider_store_st *store = vstore;
 101
 102     if (store == NULL)
 103         return;
 104     sk_OSSL_PROVIDER_pop_free(store->providers, ossl_provider_free);
 105     CRYPTO_THREAD_lock_free(store->lock);
 106     OPENSSL_free(store);
 107 }
 108
 109 static void *provider_store_new(OPENSSL_CTX *ctx)
 110 {
 111     struct provider_store_st *store = OPENSSL_zalloc(sizeof(*store));
 112     const struct predefined_providers_st *p = NULL;
 113
 114     if (store == NULL
 115         || (store->providers = sk_OSSL_PROVIDER_new(ossl_provider_cmp)) == NULL
 116         || (store->lock = CRYPTO_THREAD_lock_new()) == NULL) {
 117         provider_store_free(store);
 118         return NULL;
 119     }
 120     store->use_fallbacks = 1;
 121
 122     for (p = predefined_providers; p->name != NULL; p++) {
 123         OSSL_PROVIDER *prov = NULL;
 124
 125         /*
 126          * We use the internal constructor directly here,
 127          * otherwise we get a call loop
 128          */
 129         prov = provider_new(p->name, p->init);
 130
 131         if (prov == NULL
 132             || sk_OSSL_PROVIDER_push(store->providers, prov) == 0) {
 133             ossl_provider_free(prov);
 134             provider_store_free(store);
 135             CRYPTOerr(CRYPTO_F_PROVIDER_STORE_NEW, ERR_R_INTERNAL_ERROR);
 136             return NULL;
 137         }
 138         prov->libctx = ctx;
 139         prov->store = store;
 140 #ifndef FIPS_MODE
 141         prov->error_lib = ERR_get_next_error_library();
 142 #endif
 143         if(p->is_fallback)
 144             ossl_provider_set_fallback(prov);
 145     }
 146
 147     return store;
 148 }
 149
 150 static const OPENSSL_CTX_METHOD provider_store_method = {
 151     provider_store_new,
 152     provider_store_free,
 153 };
 154
 155 static struct provider_store_st *get_provider_store(OPENSSL_CTX *libctx)
 156 {
 157     struct provider_store_st *store = NULL;
 158
 159     store = openssl_ctx_get_data(libctx, OPENSSL_CTX_PROVIDER_STORE_INDEX,
 160                                  &provider_store_method);
 161     if (store == NULL)
 162         CRYPTOerr(CRYPTO_F_GET_PROVIDER_STORE, ERR_R_INTERNAL_ERROR);
 163     return store;
 164 }
 165
 166 OSSL_PROVIDER *ossl_provider_find(OPENSSL_CTX *libctx, const char *name,
 167                                   int noconfig)
 168 {
 169     struct provider_store_st *store = NULL;
 170     OSSL_PROVIDER *prov = NULL;
 171
 172     if ((store = get_provider_store(libctx)) != NULL) {
 173         OSSL_PROVIDER tmpl = { 0, };
 174         int i;
 175
 176 #ifndef FIPS_MODE
 177         /*
 178          * Make sure any providers are loaded from config before we try to find
 179          * them.
 180          */
 181         if (!noconfig)
 182             OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
 183 #endif
 184
 185         tmpl.name = (char *)name;
 186         CRYPTO_THREAD_write_lock(store->lock);
 187         if ((i = sk_OSSL_PROVIDER_find(store->providers, &tmpl)) == -1
 188             || (prov = sk_OSSL_PROVIDER_value(store->providers, i)) == NULL
 189             || !ossl_provider_up_ref(prov))
 190             prov = NULL;
 191         CRYPTO_THREAD_unlock(store->lock);
 192     }
 193
 194     return prov;
 195 }
 196
 197 /*-
 198  * Provider Object methods
 199  * =======================
 200  */
 201
 202 static OSSL_PROVIDER *provider_new(const char *name,
 203                                    OSSL_provider_init_fn *init_function)
 204 {
 205     OSSL_PROVIDER *prov = NULL;
 206
 207     if ((prov = OPENSSL_zalloc(sizeof(*prov))) == NULL
 208 #ifndef HAVE_ATOMICS
 209         || (prov->refcnt_lock = CRYPTO_THREAD_lock_new()) == NULL
 210 #endif
 211         || !ossl_provider_up_ref(prov) /* +1 One reference to be returned */
 212         || (prov->name = OPENSSL_strdup(name)) == NULL) {
 213         ossl_provider_free(prov);
 214         CRYPTOerr(CRYPTO_F_PROVIDER_NEW, ERR_R_MALLOC_FAILURE);
 215         return NULL;
 216     }
 217
 218     prov->init_function = init_function;
 219     return prov;
 220 }
 221
 222 int ossl_provider_up_ref(OSSL_PROVIDER *prov)
 223 {
 224     int ref = 0;
 225
 226     if (CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock) <= 0)
 227         return 0;
 228     return ref;
 229 }
 230
 231 OSSL_PROVIDER *ossl_provider_new(OPENSSL_CTX *libctx, const char *name,
 232                                  OSSL_provider_init_fn *init_function,
 233                                  int noconfig)
 234 {
 235     struct provider_store_st *store = NULL;
 236     OSSL_PROVIDER *prov = NULL;
 237
 238     if ((store = get_provider_store(libctx)) == NULL)
 239         return NULL;
 240
 241     if ((prov = ossl_provider_find(libctx, name,
 242                                    noconfig)) != NULL) { /* refcount +1 */
 243         ossl_provider_free(prov); /* refcount -1 */
 244         ERR_raise_data(ERR_LIB_CRYPTO, CRYPTO_R_PROVIDER_ALREADY_EXISTS, NULL,
 245                        "name=%s", name);
 246         return NULL;
 247     }
 248
 249     /* provider_new() generates an error, so no need here */
 250     if ((prov = provider_new(name, init_function)) == NULL)
 251         return NULL;
 252
 253     CRYPTO_THREAD_write_lock(store->lock);
 254     if (!ossl_provider_up_ref(prov)) { /* +1 One reference for the store */
 255         ossl_provider_free(prov); /* -1 Reference that was to be returned */
 256         prov = NULL;
 257     } else if (sk_OSSL_PROVIDER_push(store->providers, prov) == 0) {
 258         ossl_provider_free(prov); /* -1 Store reference */
 259         ossl_provider_free(prov); /* -1 Reference that was to be returned */
 260         prov = NULL;
 261     } else {
 262         prov->libctx = libctx;
 263         prov->store = store;
 264 #ifndef FIPS_MODE
 265         prov->error_lib = ERR_get_next_error_library();
 266 #endif
 267     }
 268     CRYPTO_THREAD_unlock(store->lock);
 269
 270     if (prov == NULL)
 271         CRYPTOerr(CRYPTO_F_OSSL_PROVIDER_NEW, ERR_R_MALLOC_FAILURE);
 272
 273     /*
 274      * At this point, the provider is only partially "loaded".  To be
 275      * fully "loaded", ossl_provider_activate() must also be called.
 276      */
 277
 278     return prov;
 279 }
 280
 281 static void free_infopair(INFOPAIR *pair)
 282 {
 283     OPENSSL_free(pair->name);
 284     OPENSSL_free(pair->value);
 285     OPENSSL_free(pair);
 286 }
 287
 288 void ossl_provider_free(OSSL_PROVIDER *prov)
 289 {
 290     if (prov != NULL) {
 291         int ref = 0;
 292
 293         CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
 294
 295         /*
 296          * When the refcount drops below two, the store is the only
 297          * possible reference, or it has already been taken away from
 298          * the store (this may happen if a provider was activated
 299          * because it's a fallback, but isn't currently used)
 300          * When that happens, the provider is inactivated.
 301          */
 302         if (ref < 2 && prov->flag_initialized) {
 303 #ifndef FIPS_MODE
 304             ossl_init_thread_deregister(prov);
 305 #endif
 306             if (prov->teardown != NULL)
 307                 prov->teardown(prov->provctx);
 308 #ifndef OPENSSL_NO_ERR
 309 # ifndef FIPS_MODE
 310             if (prov->error_strings != NULL) {
 311                 ERR_unload_strings(prov->error_lib, prov->error_strings);
 312                 OPENSSL_free(prov->error_strings);
 313                 prov->error_strings = NULL;
 314             }
 315 # endif
 316 #endif
 317             prov->flag_initialized = 0;
 318         }
 319
 320         /*
 321          * When the refcount drops to zero, it has been taken out of
 322          * the store.  All we have to do here is clean it out.
 323          */
 324         if (ref == 0) {
 325 #ifndef FIPS_MODE
 326             DSO_free(prov->module);
 327 #endif
 328             OPENSSL_free(prov->name);
 329             OPENSSL_free(prov->path);
 330             sk_INFOPAIR_pop_free(prov->parameters, free_infopair);
 331 #ifndef HAVE_ATOMICS
 332             CRYPTO_THREAD_lock_free(prov->refcnt_lock);
 333 #endif
 334             OPENSSL_free(prov);
 335         }
 336     }
 337 }
 338
 339 /* Setters */
 340 int ossl_provider_set_module_path(OSSL_PROVIDER *prov, const char *module_path)
 341 {
 342     OPENSSL_free(prov->path);
 343     if (module_path == NULL)
 344         return 1;
 345     if ((prov->path = OPENSSL_strdup(module_path)) != NULL)
 346         return 1;
 347     CRYPTOerr(CRYPTO_F_OSSL_PROVIDER_SET_MODULE_PATH, ERR_R_MALLOC_FAILURE);
 348     return 0;
 349 }
 350
 351 int ossl_provider_add_parameter(OSSL_PROVIDER *prov,
 352                                 const char *name, const char *value)
 353 {
 354     INFOPAIR *pair = NULL;
 355
 356     if ((pair = OPENSSL_zalloc(sizeof(*pair))) != NULL
 357         && (prov->parameters != NULL
 358             || (prov->parameters = sk_INFOPAIR_new_null()) != NULL)
 359         && (pair->name = OPENSSL_strdup(name)) != NULL
 360         && (pair->value = OPENSSL_strdup(value)) != NULL
 361         && sk_INFOPAIR_push(prov->parameters, pair) > 0)
 362         return 1;
 363
 364     if (pair != NULL) {
 365         OPENSSL_free(pair->name);
 366         OPENSSL_free(pair->value);
 367         OPENSSL_free(pair);
 368     }
 369     CRYPTOerr(CRYPTO_F_OSSL_PROVIDER_ADD_PARAMETER, ERR_R_MALLOC_FAILURE);
 370     return 0;
 371 }
 372
 373 /*
 374  * Provider activation.
 375  *
 376  * What "activation" means depends on the provider form; for built in
 377  * providers (in the library or the application alike), the provider
 378  * can already be considered to be loaded, all that's needed is to
 379  * initialize it.  However, for dynamically loadable provider modules,
 380  * we must first load that module.
 381  *
 382  * Built in modules are distinguished from dynamically loaded modules
 383  * with an already assigned init function.
 384  */
 385 static const OSSL_DISPATCH *core_dispatch; /* Define further down */
 386
 387 /*
 388  * Internal version that doesn't affect the store flags, and thereby avoid
 389  * locking.  Direct callers must remember to set the store flags when
 390  * appropriate.
 391  */
 392 static int provider_activate(OSSL_PROVIDER *prov)
 393 {
 394     const OSSL_DISPATCH *provider_dispatch = NULL;
 395 #ifndef OPENSSL_NO_ERR
 396 # ifndef FIPS_MODE
 397     OSSL_provider_get_reason_strings_fn *p_get_reason_strings = NULL;
 398 # endif
 399 #endif
 400
 401     if (prov->flag_initialized)
 402         return 1;
 403
 404     /*
 405      * If the init function isn't set, it indicates that this provider is
 406      * a loadable module.
 407      */
 408     if (prov->init_function == NULL) {
 409 #ifdef FIPS_MODE
 410         return 0;
 411 #else
 412         if (prov->module == NULL) {
 413             char *allocated_path = NULL;
 414             const char *module_path = NULL;
 415             char *merged_path = NULL;
 416             const char *load_dir = ossl_safe_getenv("OPENSSL_MODULES");
 417
 418             if ((prov->module = DSO_new()) == NULL) {
 419                 /* DSO_new() generates an error already */
 420                 return 0;
 421             }
 422
 423             if (load_dir == NULL)
 424                 load_dir = MODULESDIR;
 425
 426             DSO_ctrl(prov->module, DSO_CTRL_SET_FLAGS,
 427                      DSO_FLAG_NAME_TRANSLATION_EXT_ONLY, NULL);
 428
 429             module_path = prov->path;
 430             if (module_path == NULL)
 431                 module_path = allocated_path =
 432                     DSO_convert_filename(prov->module, prov->name);
 433             if (module_path != NULL)
 434                 merged_path = DSO_merge(prov->module, module_path, load_dir);
 435
 436             if (merged_path == NULL
 437                 || (DSO_load(prov->module, merged_path, NULL, 0)) == NULL) {
 438                 DSO_free(prov->module);
 439                 prov->module = NULL;
 440             }
 441
 442             OPENSSL_free(merged_path);
 443             OPENSSL_free(allocated_path);
 444         }
 445
 446         if (prov->module != NULL)
 447             prov->init_function = (OSSL_provider_init_fn *)
 448                 DSO_bind_func(prov->module, "OSSL_provider_init");
 449 #endif
 450     }
 451
 452     /* Call the initialise function for the provider. */
 453     if (prov->init_function == NULL
 454         || !prov->init_function(prov, core_dispatch, &provider_dispatch,
 455                                 &prov->provctx)) {
 456         ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_INIT_FAIL, NULL,
 457                        "name=%s", prov->name);
 458 #ifndef FIPS_MODE
 459         DSO_free(prov->module);
 460         prov->module = NULL;
 461 #endif
 462         return 0;
 463     }
 464
 465     for (; provider_dispatch->function_id != 0; provider_dispatch++) {
 466         switch (provider_dispatch->function_id) {
 467         case OSSL_FUNC_PROVIDER_TEARDOWN:
 468             prov->teardown =
 469                 OSSL_get_provider_teardown(provider_dispatch);
 470             break;
 471         case OSSL_FUNC_PROVIDER_GETTABLE_PARAMS:
 472             prov->gettable_params =
 473                 OSSL_get_provider_gettable_params(provider_dispatch);
 474             break;
 475         case OSSL_FUNC_PROVIDER_GET_PARAMS:
 476             prov->get_params =
 477                 OSSL_get_provider_get_params(provider_dispatch);
 478             break;
 479         case OSSL_FUNC_PROVIDER_QUERY_OPERATION:
 480             prov->query_operation =
 481                 OSSL_get_provider_query_operation(provider_dispatch);
 482             break;
 483 #ifndef OPENSSL_NO_ERR
 484 # ifndef FIPS_MODE
 485         case OSSL_FUNC_PROVIDER_GET_REASON_STRINGS:
 486             p_get_reason_strings =
 487                 OSSL_get_provider_get_reason_strings(provider_dispatch);
 488             break;
 489 # endif
 490 #endif
 491         }
 492     }
 493
 494 #ifndef OPENSSL_NO_ERR
 495 # ifndef FIPS_MODE
 496     if (p_get_reason_strings != NULL) {
 497         const OSSL_ITEM *reasonstrings = p_get_reason_strings(prov->provctx);
 498         size_t cnt, cnt2;
 499
 500         /*
 501          * ERR_load_strings() handles ERR_STRING_DATA rather than OSSL_ITEM,
 502          * although they are essentially the same type.
 503          * Furthermore, ERR_load_strings() patches the array's error number
 504          * with the error library number, so we need to make a copy of that
 505          * array either way.
 506          */
 507         cnt = 1;                 /* One for the terminating item */
 508         while (reasonstrings[cnt].id != 0) {
 509             if (ERR_GET_LIB(reasonstrings[cnt].id) != 0)
 510                 return 0;
 511             cnt++;
 512         }
 513
 514         /* Allocate one extra item for the "library" name */
 515         prov->error_strings =
 516             OPENSSL_zalloc(sizeof(ERR_STRING_DATA) * (cnt + 1));
 517         if (prov->error_strings == NULL)
 518             return 0;
 519
 520         /*
 521          * Set the "library" name.
 522          */
 523         prov->error_strings[0].error = ERR_PACK(prov->error_lib, 0, 0);
 524         prov->error_strings[0].string = prov->name;
 525         /*
 526          * Copy reasonstrings item 0..cnt-1 to prov->error_trings positions
 527          * 1..cnt.
 528          */
 529         for (cnt2 = 1; cnt2 <= cnt; cnt2++) {
 530             prov->error_strings[cnt2].error = (int)reasonstrings[cnt2-1].id;
 531             prov->error_strings[cnt2].string = reasonstrings[cnt2-1].ptr;
 532         }
 533
 534         ERR_load_strings(prov->error_lib, prov->error_strings);
 535     }
 536 # endif
 537 #endif
 538
 539     /* With this flag set, this provider has become fully "loaded". */
 540     prov->flag_initialized = 1;
 541
 542     return 1;
 543 }
 544
 545 int ossl_provider_activate(OSSL_PROVIDER *prov)
 546 {
 547     if (provider_activate(prov)) {
 548         CRYPTO_THREAD_write_lock(prov->store->lock);
 549         prov->store->use_fallbacks = 0;
 550         CRYPTO_THREAD_unlock(prov->store->lock);
 551         return 1;
 552     }
 553
 554     return 0;
 555 }
 556
 557 void *ossl_provider_ctx(const OSSL_PROVIDER *prov)
 558 {
 559     return prov->provctx;
 560 }
 561
 562
 563 static int provider_forall_loaded(struct provider_store_st *store,
 564                                   int *found_activated,
 565                                   int (*cb)(OSSL_PROVIDER *provider,
 566                                             void *cbdata),
 567                                   void *cbdata)
 568 {
 569     int i;
 570     int ret = 1;
 571     int num_provs;
 572
 573     num_provs = sk_OSSL_PROVIDER_num(store->providers);
 574
 575     if (found_activated != NULL)
 576         *found_activated = 0;
 577     for (i = 0; i < num_provs; i++) {
 578         OSSL_PROVIDER *prov =
 579             sk_OSSL_PROVIDER_value(store->providers, i);
 580
 581         if (prov->flag_initialized) {
 582             if (found_activated != NULL)
 583                 *found_activated = 1;
 584             if (!(ret = cb(prov, cbdata)))
 585                 break;
 586         }
 587     }
 588
 589     return ret;
 590 }
 591
 592 /*
 593  * This function only does something once when store->use_fallbacks == 1,
 594  * and then sets store->use_fallbacks = 0, so the second call and so on is
 595  * effectively a no-op.
 596  */
 597 static void provider_activate_fallbacks(struct provider_store_st *store)
 598 {
 599     if (store->use_fallbacks) {
 600         int num_provs = sk_OSSL_PROVIDER_num(store->providers);
 601         int activated_fallback_count = 0;
 602         int i;
 603
 604         for (i = 0; i < num_provs; i++) {
 605             OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(store->providers, i);
 606
 607             /*
 608              * Note that we don't care if the activation succeeds or not.
 609              * If it doesn't succeed, then any attempt to use any of the
 610              * fallback providers will fail anyway.
 611              */
 612             if (prov->flag_fallback) {
 613                 activated_fallback_count++;
 614                 provider_activate(prov);
 615             }
 616         }
 617
 618         /*
 619          * We assume that all fallbacks have been added to the store before
 620          * any fallback is activated.
 621          * TODO: We may have to reconsider this, IF we find ourselves adding
 622          * fallbacks after any previous fallback has been activated.
 623          */
 624         if (activated_fallback_count > 0)
 625             store->use_fallbacks = 0;
 626     }
 627 }
 628
 629 int ossl_provider_forall_loaded(OPENSSL_CTX *ctx,
 630                                 int (*cb)(OSSL_PROVIDER *provider,
 631                                           void *cbdata),
 632                                 void *cbdata)
 633 {
 634     int ret = 1;
 635     struct provider_store_st *store = get_provider_store(ctx);
 636
 637 #ifndef FIPS_MODE
 638     /*
 639      * Make sure any providers are loaded from config before we try to use
 640      * them.
 641      */
 642     OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
 643 #endif
 644
 645     if (store != NULL) {
 646         CRYPTO_THREAD_read_lock(store->lock);
 647
 648         provider_activate_fallbacks(store);
 649
 650         /*
 651          * Now, we sweep through all providers
 652          */
 653         ret = provider_forall_loaded(store, NULL, cb, cbdata);
 654
 655         CRYPTO_THREAD_unlock(store->lock);
 656     }
 657
 658     return ret;
 659 }
 660
 661 int ossl_provider_available(OSSL_PROVIDER *prov)
 662 {
 663     if (prov != NULL) {
 664         CRYPTO_THREAD_read_lock(prov->store->lock);
 665         provider_activate_fallbacks(prov->store);
 666         CRYPTO_THREAD_unlock(prov->store->lock);
 667
 668         return prov->flag_initialized;
 669     }
 670     return 0;
 671 }
 672
 673 /* Setters of Provider Object data */
 674 int ossl_provider_set_fallback(OSSL_PROVIDER *prov)
 675 {
 676     if (prov == NULL)
 677         return 0;
 678
 679     prov->flag_fallback = 1;
 680     return 1;
 681 }
 682
 683 /* Getters of Provider Object data */
 684 const char *ossl_provider_name(const OSSL_PROVIDER *prov)
 685 {
 686     return prov->name;
 687 }
 688
 689 const DSO *ossl_provider_dso(const OSSL_PROVIDER *prov)
 690 {
 691     return prov->module;
 692 }
 693
 694 const char *ossl_provider_module_name(const OSSL_PROVIDER *prov)
 695 {
 696 #ifdef FIPS_MODE
 697     return NULL;
 698 #else
 699     return DSO_get_filename(prov->module);
 700 #endif
 701 }
 702
 703 const char *ossl_provider_module_path(const OSSL_PROVIDER *prov)
 704 {
 705 #ifdef FIPS_MODE
 706     return NULL;
 707 #else
 708     /* FIXME: Ensure it's a full path */
 709     return DSO_get_filename(prov->module);
 710 #endif
 711 }
 712
 713 OPENSSL_CTX *ossl_provider_library_context(const OSSL_PROVIDER *prov)
 714 {
 715     /* TODO(3.0) just: return prov->libctx; */
 716     return prov != NULL ? prov->libctx : NULL;
 717 }
 718
 719 /* Wrappers around calls to the provider */
 720 void ossl_provider_teardown(const OSSL_PROVIDER *prov)
 721 {
 722     if (prov->teardown != NULL)
 723         prov->teardown(prov->provctx);
 724 }
 725
 726 const OSSL_PARAM *ossl_provider_gettable_params(const OSSL_PROVIDER *prov)
 727 {
 728     return prov->gettable_params == NULL
 729         ? NULL : prov->gettable_params(prov->provctx);
 730 }
 731
 732 int ossl_provider_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
 733 {
 734     return prov->get_params == NULL
 735         ? 0 : prov->get_params(prov->provctx, params);
 736 }
 737
 738
 739 const OSSL_ALGORITHM *ossl_provider_query_operation(const OSSL_PROVIDER *prov,
 740                                                     int operation_id,
 741                                                     int *no_cache)
 742 {
 743     return prov->query_operation(prov->provctx, operation_id, no_cache);
 744 }
 745
 746 /*-
 747  * Core functions for the provider
 748  * ===============================
 749  *
 750  * This is the set of functions that the core makes available to the provider
 751  */
 752
 753 /*
 754  * This returns a list of Provider Object parameters with their types, for
 755  * discovery.  We do not expect that many providers will use this, but one
 756  * never knows.
 757  */
 758 static const OSSL_PARAM param_types[] = {
 759     OSSL_PARAM_DEFN("openssl-version", OSSL_PARAM_UTF8_PTR, NULL, 0),
 760     OSSL_PARAM_DEFN("provider-name", OSSL_PARAM_UTF8_PTR, NULL, 0),
 761     OSSL_PARAM_END
 762 };
 763
 764 /*
 765  * Forward declare all the functions that are provided aa dispatch.
 766  * This ensures that the compiler will complain if they aren't defined
 767  * with the correct signature.
 768  */
 769 static OSSL_core_gettable_params_fn core_gettable_params;
 770 static OSSL_core_get_params_fn core_get_params;
 771 static OSSL_core_thread_start_fn core_thread_start;
 772 static OSSL_core_get_library_context_fn core_get_libctx;
 773 #ifndef FIPS_MODE
 774 static OSSL_core_new_error_fn core_new_error;
 775 static OSSL_core_set_error_debug_fn core_set_error_debug;
 776 static OSSL_core_vset_error_fn core_vset_error;
 777 static OSSL_core_set_error_mark_fn core_set_error_mark;
 778 static OSSL_core_clear_last_error_mark_fn core_clear_last_error_mark;
 779 static OSSL_core_pop_error_to_mark_fn core_pop_error_to_mark;
 780 #endif
 781
 782 static const OSSL_PARAM *core_gettable_params(const OSSL_PROVIDER *prov)
 783 {
 784     return param_types;
 785 }
 786
 787 static int core_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
 788 {
 789     int i;
 790     OSSL_PARAM *p;
 791
 792     if ((p = OSSL_PARAM_locate(params, "openssl-version")) != NULL)
 793         OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR);
 794     if ((p = OSSL_PARAM_locate(params, "provider-name")) != NULL)
 795         OSSL_PARAM_set_utf8_ptr(p, prov->name);
 796
 797 #ifndef FIPS_MODE
 798     if ((p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_MODULE_FILENAME)) != NULL)
 799         OSSL_PARAM_set_utf8_ptr(p, ossl_provider_module_path(prov));
 800 #endif
 801
 802     if (prov->parameters == NULL)
 803         return 1;
 804
 805     for (i = 0; i < sk_INFOPAIR_num(prov->parameters); i++) {
 806         INFOPAIR *pair = sk_INFOPAIR_value(prov->parameters, i);
 807
 808         if ((p = OSSL_PARAM_locate(params, pair->name)) != NULL)
 809             OSSL_PARAM_set_utf8_ptr(p, pair->value);
 810     }
 811     return 1;
 812 }
 813
 814 static OPENSSL_CTX *core_get_libctx(const OSSL_PROVIDER *prov)
 815 {
 816     return ossl_provider_library_context(prov);
 817 }
 818
 819 static int core_thread_start(const OSSL_PROVIDER *prov,
 820                              OSSL_thread_stop_handler_fn handfn)
 821 {
 822     return ossl_init_thread_start(prov, prov->provctx, handfn);
 823 }
 824
 825 /*
 826  * The FIPS module inner provider doesn't implement these.  They aren't
 827  * needed there, since the FIPS module upcalls are always the outer provider
 828  * ones.
 829  */
 830 #ifndef FIPS_MODE
 831 /*
 832  * TODO(3.0) These error functions should use |prov| to select the proper
 833  * library context to report in the correct error stack, at least if error
 834  * stacks become tied to the library context.
 835  * We cannot currently do that since there's no support for it in the
 836  * ERR subsystem.
 837  */
 838 static void core_new_error(const OSSL_PROVIDER *prov)
 839 {
 840     ERR_new();
 841 }
 842
 843 static void core_set_error_debug(const OSSL_PROVIDER *prov,
 844                                  const char *file, int line, const char *func)
 845 {
 846     ERR_set_debug(file, line, func);
 847 }
 848
 849 static void core_vset_error(const OSSL_PROVIDER *prov,
 850                             uint32_t reason, const char *fmt, va_list args)
 851 {
 852     /*
 853      * If the uppermost 8 bits are non-zero, it's an OpenSSL library
 854      * error and will be treated as such.  Otherwise, it's a new style
 855      * provider error and will be treated as such.
 856      */
 857     if (ERR_GET_LIB(reason) != 0) {
 858         ERR_vset_error(ERR_GET_LIB(reason), ERR_GET_REASON(reason), fmt, args);
 859     } else {
 860         ERR_vset_error(prov->error_lib, (int)reason, fmt, args);
 861     }
 862 }
 863
 864 static int core_set_error_mark(const OSSL_PROVIDER *prov)
 865 {
 866     return ERR_set_mark();
 867 }
 868
 869 static int core_clear_last_error_mark(const OSSL_PROVIDER *prov)
 870 {
 871     return ERR_clear_last_mark();
 872 }
 873
 874 static int core_pop_error_to_mark(const OSSL_PROVIDER *prov)
 875 {
 876     return ERR_pop_to_mark();
 877 }
 878 #endif
 879
 880 /*
 881  * Functions provided by the core.  Blank line separates "families" of related
 882  * functions.
 883  */
 884 static const OSSL_DISPATCH core_dispatch_[] = {
 885     { OSSL_FUNC_CORE_GETTABLE_PARAMS, (void (*)(void))core_gettable_params },
 886     { OSSL_FUNC_CORE_GET_PARAMS, (void (*)(void))core_get_params },
 887     { OSSL_FUNC_CORE_GET_LIBRARY_CONTEXT, (void (*)(void))core_get_libctx },
 888     { OSSL_FUNC_CORE_THREAD_START, (void (*)(void))core_thread_start },
 889 #ifndef FIPS_MODE
 890     { OSSL_FUNC_CORE_NEW_ERROR, (void (*)(void))core_new_error },
 891     { OSSL_FUNC_CORE_SET_ERROR_DEBUG, (void (*)(void))core_set_error_debug },
 892     { OSSL_FUNC_CORE_VSET_ERROR, (void (*)(void))core_vset_error },
 893     { OSSL_FUNC_CORE_SET_ERROR_MARK, (void (*)(void))core_set_error_mark },
 894     { OSSL_FUNC_CORE_CLEAR_LAST_ERROR_MARK,
 895       (void (*)(void))core_clear_last_error_mark },
 896     { OSSL_FUNC_CORE_POP_ERROR_TO_MARK,
 897       (void (*)(void))core_pop_error_to_mark },
 898     { OSSL_FUNC_BIO_NEW_FILE, (void (*)(void))BIO_new_file },
 899     { OSSL_FUNC_BIO_NEW_MEMBUF, (void (*)(void))BIO_new_mem_buf },
 900     { OSSL_FUNC_BIO_READ_EX, (void (*)(void))BIO_read_ex },
 901     { OSSL_FUNC_BIO_FREE, (void (*)(void))BIO_free },
 902     { OSSL_FUNC_BIO_VPRINTF, (void (*)(void))BIO_vprintf },
 903     { OSSL_FUNC_SELF_TEST_CB, (void (*)(void))OSSL_SELF_TEST_get_callback },
 904 #endif
 905     { OSSL_FUNC_CRYPTO_MALLOC, (void (*)(void))CRYPTO_malloc },
 906     { OSSL_FUNC_CRYPTO_ZALLOC, (void (*)(void))CRYPTO_zalloc },
 907     { OSSL_FUNC_CRYPTO_FREE, (void (*)(void))CRYPTO_free },
 908     { OSSL_FUNC_CRYPTO_CLEAR_FREE, (void (*)(void))CRYPTO_clear_free },
 909     { OSSL_FUNC_CRYPTO_REALLOC, (void (*)(void))CRYPTO_realloc },
 910     { OSSL_FUNC_CRYPTO_CLEAR_REALLOC, (void (*)(void))CRYPTO_clear_realloc },
 911     { OSSL_FUNC_CRYPTO_SECURE_MALLOC, (void (*)(void))CRYPTO_secure_malloc },
 912     { OSSL_FUNC_CRYPTO_SECURE_ZALLOC, (void (*)(void))CRYPTO_secure_zalloc },
 913     { OSSL_FUNC_CRYPTO_SECURE_FREE, (void (*)(void))CRYPTO_secure_free },
 914     { OSSL_FUNC_CRYPTO_SECURE_CLEAR_FREE,
 915         (void (*)(void))CRYPTO_secure_clear_free },
 916     { OSSL_FUNC_CRYPTO_SECURE_ALLOCATED,
 917         (void (*)(void))CRYPTO_secure_allocated },
 918     { OSSL_FUNC_OPENSSL_CLEANSE, (void (*)(void))OPENSSL_cleanse },
 919
 920     { 0, NULL }
 921 };
 922 static const OSSL_DISPATCH *core_dispatch = core_dispatch_;