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