2 * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
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
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 "internal/core.h"
26 #include "provider_local.h"
28 # include <openssl/self_test.h>
32 * This file defines and uses a number of different structures:
34 * OSSL_PROVIDER (provider_st): Used to represent all information related to a
35 * single instance of a provider.
37 * provider_store_st: Holds information about the collection of providers that
38 * are available within the current library context (OSSL_LIB_CTX). It also
39 * holds configuration information about providers that could be loaded at some
42 * OSSL_PROVIDER_CHILD_CB: An instance of this structure holds the callbacks
43 * that have been registered for a child library context and the associated
44 * provider that registered those callbacks.
46 * Where a child library context exists then it has its own instance of the
47 * provider store. Each provider that exists in the parent provider store, has
48 * an associated child provider in the child library context's provider store.
49 * As providers get activated or deactivated this needs to be mirrored in the
50 * associated child providers.
55 * There are a number of different locks used in this file and it is important
56 * to understand how they should be used in order to avoid deadlocks.
58 * Fields within a structure can often be "write once" on creation, and then
59 * "read many". Creation of a structure is done by a single thread, and
60 * therefore no lock is required for the "write once/read many" fields. It is
61 * safe for multiple threads to read these fields without a lock, because they
62 * will never be changed.
64 * However some fields may be changed after a structure has been created and
65 * shared between multiple threads. Where this is the case a lock is required.
67 * The locks available are:
69 * The provider flag_lock: Used to control updates to the various provider
70 * "flags" (flag_initialized and flag_activated) and associated
71 * "counts" (activatecnt).
73 * The provider refcnt_lock: Only ever used to control updates to the provider
76 * The provider optbits_lock: Used to control access to the provider's
77 * operation_bits and operation_bits_sz fields.
79 * The store default_path_lock: Used to control access to the provider store's
80 * default search path value (default_path)
82 * The store lock: Used to control the stack of provider's held within the
83 * provider store, as well as the stack of registered child provider callbacks.
85 * As a general rule-of-thumb it is best to:
86 * - keep the scope of the code that is protected by a lock to the absolute
88 * - try to keep the scope of the lock to within a single function (i.e. avoid
89 * making calls to other functions while holding a lock);
90 * - try to only ever hold one lock at a time.
92 * Unfortunately, it is not always possible to stick to the above guidelines.
93 * Where they are not adhered to there is always a danger of inadvertently
94 * introducing the possibility of deadlock. The following rules MUST be adhered
95 * to in order to avoid that:
96 * - Holding multiple locks at the same time is only allowed for the
97 * provider store lock, the provider flag_lock and the provider refcnt_lock.
98 * - When holding multiple locks they must be acquired in the following order of
100 * 1) provider store lock
101 * 2) provider flag_lock
102 * 3) provider refcnt_lock
103 * - When releasing locks they must be released in the reverse order to which
105 * - No locks may be held when making an upcall. NOTE: Some common functions
106 * can make upcalls as part of their normal operation. If you need to call
107 * some other function while holding a lock make sure you know whether it
108 * will make any upcalls or not. For example ossl_provider_up_ref() can call
109 * ossl_provider_up_ref_parent() which can call the c_prov_up_ref() upcall.
110 * - It is permissible to hold the store lock when calling child provider
111 * callbacks. No other locks may be held during such callbacks.
114 static OSSL_PROVIDER *provider_new(const char *name,
115 OSSL_provider_init_fn *init_function,
116 STACK_OF(INFOPAIR) *parameters);
119 * Provider Object structure
120 * =========================
126 int (*create_cb)(const OSSL_CORE_HANDLE *provider, void *cbdata);
127 int (*remove_cb)(const OSSL_CORE_HANDLE *provider, void *cbdata);
128 int (*global_props_cb)(const char *props, void *cbdata);
130 } OSSL_PROVIDER_CHILD_CB;
131 DEFINE_STACK_OF(OSSL_PROVIDER_CHILD_CB)
134 struct provider_store_st; /* Forward declaration */
136 struct ossl_provider_st {
138 unsigned int flag_initialized:1;
139 unsigned int flag_activated:1;
141 /* Getting and setting the flags require synchronization */
142 CRYPTO_RWLOCK *flag_lock;
144 /* OpenSSL library side data */
145 CRYPTO_REF_COUNT refcnt;
146 CRYPTO_RWLOCK *refcnt_lock; /* For the ref counter */
151 OSSL_provider_init_fn *init_function;
152 STACK_OF(INFOPAIR) *parameters;
153 OSSL_LIB_CTX *libctx; /* The library context this instance is in */
154 struct provider_store_st *store; /* The store this instance belongs to */
157 * In the FIPS module inner provider, this isn't needed, since the
158 * error upcalls are always direct calls to the outer provider.
160 int error_lib; /* ERR library number, one for each provider */
161 # ifndef OPENSSL_NO_ERR
162 ERR_STRING_DATA *error_strings; /* Copy of what the provider gives us */
166 /* Provider side functions */
167 OSSL_FUNC_provider_teardown_fn *teardown;
168 OSSL_FUNC_provider_gettable_params_fn *gettable_params;
169 OSSL_FUNC_provider_get_params_fn *get_params;
170 OSSL_FUNC_provider_get_capabilities_fn *get_capabilities;
171 OSSL_FUNC_provider_self_test_fn *self_test;
172 OSSL_FUNC_provider_query_operation_fn *query_operation;
173 OSSL_FUNC_provider_unquery_operation_fn *unquery_operation;
176 * Cache of bit to indicate of query_operation() has been called on
177 * a specific operation or not.
179 unsigned char *operation_bits;
180 size_t operation_bits_sz;
181 CRYPTO_RWLOCK *opbits_lock;
184 /* Whether this provider is the child of some other provider */
185 const OSSL_CORE_HANDLE *handle;
186 unsigned int ischild:1;
189 /* Provider side data */
191 const OSSL_DISPATCH *dispatch;
193 DEFINE_STACK_OF(OSSL_PROVIDER)
195 static int ossl_provider_cmp(const OSSL_PROVIDER * const *a,
196 const OSSL_PROVIDER * const *b)
198 return strcmp((*a)->name, (*b)->name);
202 * Provider Object store
203 * =====================
205 * The Provider Object store is a library context object, and therefore needs
209 struct provider_store_st {
210 OSSL_LIB_CTX *libctx;
211 STACK_OF(OSSL_PROVIDER) *providers;
212 STACK_OF(OSSL_PROVIDER_CHILD_CB) *child_cbs;
213 CRYPTO_RWLOCK *default_path_lock;
216 OSSL_PROVIDER_INFO *provinfo;
219 unsigned int use_fallbacks:1;
220 unsigned int freeing:1;
224 * provider_deactivate_free() is a wrapper around ossl_provider_deactivate()
225 * and ossl_provider_free(), called as needed.
226 * Since this is only called when the provider store is being emptied, we
227 * don't need to care about any lock.
229 static void provider_deactivate_free(OSSL_PROVIDER *prov)
231 if (prov->flag_activated)
232 ossl_provider_deactivate(prov, 1);
233 ossl_provider_free(prov);
237 static void ossl_provider_child_cb_free(OSSL_PROVIDER_CHILD_CB *cb)
243 static void infopair_free(INFOPAIR *pair)
245 OPENSSL_free(pair->name);
246 OPENSSL_free(pair->value);
250 static INFOPAIR *infopair_copy(const INFOPAIR *src)
252 INFOPAIR *dest = OPENSSL_zalloc(sizeof(*dest));
256 if (src->name != NULL) {
257 dest->name = OPENSSL_strdup(src->name);
258 if (dest->name == NULL)
261 if (src->value != NULL) {
262 dest->value = OPENSSL_strdup(src->value);
263 if (dest->value == NULL)
268 OPENSSL_free(dest->name);
273 void ossl_provider_info_clear(OSSL_PROVIDER_INFO *info)
275 OPENSSL_free(info->name);
276 OPENSSL_free(info->path);
277 sk_INFOPAIR_pop_free(info->parameters, infopair_free);
280 static void provider_store_free(void *vstore)
282 struct provider_store_st *store = vstore;
288 OPENSSL_free(store->default_path);
289 sk_OSSL_PROVIDER_pop_free(store->providers, provider_deactivate_free);
291 sk_OSSL_PROVIDER_CHILD_CB_pop_free(store->child_cbs,
292 ossl_provider_child_cb_free);
294 CRYPTO_THREAD_lock_free(store->default_path_lock);
295 CRYPTO_THREAD_lock_free(store->lock);
296 for (i = 0; i < store->numprovinfo; i++)
297 ossl_provider_info_clear(&store->provinfo[i]);
298 OPENSSL_free(store->provinfo);
302 static void *provider_store_new(OSSL_LIB_CTX *ctx)
304 struct provider_store_st *store = OPENSSL_zalloc(sizeof(*store));
307 || (store->providers = sk_OSSL_PROVIDER_new(ossl_provider_cmp)) == NULL
308 || (store->default_path_lock = CRYPTO_THREAD_lock_new()) == NULL
310 || (store->child_cbs = sk_OSSL_PROVIDER_CHILD_CB_new_null()) == NULL
312 || (store->lock = CRYPTO_THREAD_lock_new()) == NULL) {
313 provider_store_free(store);
317 store->use_fallbacks = 1;
322 static const OSSL_LIB_CTX_METHOD provider_store_method = {
323 /* Needs to be freed before the child provider data is freed */
324 OSSL_LIB_CTX_METHOD_PRIORITY_1,
329 static struct provider_store_st *get_provider_store(OSSL_LIB_CTX *libctx)
331 struct provider_store_st *store = NULL;
333 store = ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_PROVIDER_STORE_INDEX,
334 &provider_store_method);
336 ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
340 int ossl_provider_disable_fallback_loading(OSSL_LIB_CTX *libctx)
342 struct provider_store_st *store;
344 if ((store = get_provider_store(libctx)) != NULL) {
345 if (!CRYPTO_THREAD_write_lock(store->lock))
347 store->use_fallbacks = 0;
348 CRYPTO_THREAD_unlock(store->lock);
354 #define BUILTINS_BLOCK_SIZE 10
356 int ossl_provider_info_add_to_store(OSSL_LIB_CTX *libctx,
357 OSSL_PROVIDER_INFO *entry)
359 struct provider_store_st *store = get_provider_store(libctx);
362 if (entry->name == NULL) {
363 ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
368 ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
372 if (!CRYPTO_THREAD_write_lock(store->lock))
374 if (store->provinfosz == 0) {
375 store->provinfo = OPENSSL_zalloc(sizeof(*store->provinfo)
376 * BUILTINS_BLOCK_SIZE);
377 if (store->provinfo == NULL) {
378 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
381 store->provinfosz = BUILTINS_BLOCK_SIZE;
382 } else if (store->numprovinfo == store->provinfosz) {
383 OSSL_PROVIDER_INFO *tmpbuiltins;
384 size_t newsz = store->provinfosz + BUILTINS_BLOCK_SIZE;
386 tmpbuiltins = OPENSSL_realloc(store->provinfo,
387 sizeof(*store->provinfo) * newsz);
388 if (tmpbuiltins == NULL) {
389 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
392 store->provinfo = tmpbuiltins;
393 store->provinfosz = newsz;
395 store->provinfo[store->numprovinfo] = *entry;
396 store->numprovinfo++;
400 CRYPTO_THREAD_unlock(store->lock);
404 OSSL_PROVIDER *ossl_provider_find(OSSL_LIB_CTX *libctx, const char *name,
407 struct provider_store_st *store = NULL;
408 OSSL_PROVIDER *prov = NULL;
410 if ((store = get_provider_store(libctx)) != NULL) {
411 OSSL_PROVIDER tmpl = { 0, };
416 * Make sure any providers are loaded from config before we try to find
420 if (ossl_lib_ctx_is_default(libctx))
421 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
425 tmpl.name = (char *)name;
426 if (!CRYPTO_THREAD_read_lock(store->lock))
428 if ((i = sk_OSSL_PROVIDER_find(store->providers, &tmpl)) != -1)
429 prov = sk_OSSL_PROVIDER_value(store->providers, i);
430 CRYPTO_THREAD_unlock(store->lock);
431 if (prov != NULL && !ossl_provider_up_ref(prov))
439 * Provider Object methods
440 * =======================
443 static OSSL_PROVIDER *provider_new(const char *name,
444 OSSL_provider_init_fn *init_function,
445 STACK_OF(INFOPAIR) *parameters)
447 OSSL_PROVIDER *prov = NULL;
449 if ((prov = OPENSSL_zalloc(sizeof(*prov))) == NULL
451 || (prov->refcnt_lock = CRYPTO_THREAD_lock_new()) == NULL
453 || (prov->opbits_lock = CRYPTO_THREAD_lock_new()) == NULL
454 || (prov->flag_lock = CRYPTO_THREAD_lock_new()) == NULL
455 || (prov->name = OPENSSL_strdup(name)) == NULL
456 || (prov->parameters = sk_INFOPAIR_deep_copy(parameters,
458 infopair_free)) == NULL) {
459 ossl_provider_free(prov);
460 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
464 prov->refcnt = 1; /* 1 One reference to be returned */
465 prov->init_function = init_function;
470 int ossl_provider_up_ref(OSSL_PROVIDER *prov)
474 if (CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock) <= 0)
479 if (!ossl_provider_up_ref_parent(prov, 0)) {
480 ossl_provider_free(prov);
490 static int provider_up_ref_intern(OSSL_PROVIDER *prov, int activate)
493 return ossl_provider_activate(prov, 1, 0);
495 return ossl_provider_up_ref(prov);
498 static int provider_free_intern(OSSL_PROVIDER *prov, int deactivate)
501 return ossl_provider_deactivate(prov, 1);
503 ossl_provider_free(prov);
508 OSSL_PROVIDER *ossl_provider_new(OSSL_LIB_CTX *libctx, const char *name,
509 OSSL_provider_init_fn *init_function,
512 struct provider_store_st *store = NULL;
513 OSSL_PROVIDER_INFO template;
514 OSSL_PROVIDER *prov = NULL;
516 if ((store = get_provider_store(libctx)) == NULL)
519 if ((prov = ossl_provider_find(libctx, name,
520 noconfig)) != NULL) { /* refcount +1 */
521 ossl_provider_free(prov); /* refcount -1 */
522 ERR_raise_data(ERR_LIB_CRYPTO, CRYPTO_R_PROVIDER_ALREADY_EXISTS,
527 memset(&template, 0, sizeof(template));
528 if (init_function == NULL) {
529 const OSSL_PROVIDER_INFO *p;
532 /* Check if this is a predefined builtin provider */
533 for (p = ossl_predefined_providers; p->name != NULL; p++) {
534 if (strcmp(p->name, name) == 0) {
539 if (p->name == NULL) {
540 /* Check if this is a user added builtin provider */
541 if (!CRYPTO_THREAD_read_lock(store->lock))
543 for (i = 0, p = store->provinfo; i < store->numprovinfo; p++, i++) {
544 if (strcmp(p->name, name) == 0) {
549 CRYPTO_THREAD_unlock(store->lock);
552 template.init = init_function;
555 /* provider_new() generates an error, so no need here */
556 if ((prov = provider_new(name, template.init, template.parameters)) == NULL)
559 prov->libctx = libctx;
561 prov->error_lib = ERR_get_next_error_library();
565 * At this point, the provider is only partially "loaded". To be
566 * fully "loaded", ossl_provider_activate() must also be called and it must
567 * then be added to the provider store.
573 /* Assumes that the store lock is held */
574 static int create_provider_children(OSSL_PROVIDER *prov)
578 struct provider_store_st *store = prov->store;
579 OSSL_PROVIDER_CHILD_CB *child_cb;
582 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
583 for (i = 0; i < max; i++) {
585 * This is newly activated (activatecnt == 1), so we need to
586 * create child providers as necessary.
588 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
589 ret &= child_cb->create_cb((OSSL_CORE_HANDLE *)prov, child_cb->cbdata);
596 int ossl_provider_add_to_store(OSSL_PROVIDER *prov, OSSL_PROVIDER **actualprov,
597 int retain_fallbacks)
599 struct provider_store_st *store;
601 OSSL_PROVIDER tmpl = { 0, };
602 OSSL_PROVIDER *actualtmp = NULL;
604 if ((store = get_provider_store(prov->libctx)) == NULL)
607 if (!CRYPTO_THREAD_write_lock(store->lock))
610 tmpl.name = (char *)prov->name;
611 idx = sk_OSSL_PROVIDER_find(store->providers, &tmpl);
615 actualtmp = sk_OSSL_PROVIDER_value(store->providers, idx);
618 if (sk_OSSL_PROVIDER_push(store->providers, prov) == 0)
621 if (!create_provider_children(prov)) {
622 sk_OSSL_PROVIDER_delete_ptr(store->providers, prov);
625 if (!retain_fallbacks)
626 store->use_fallbacks = 0;
629 CRYPTO_THREAD_unlock(store->lock);
631 if (actualprov != NULL) {
632 if (!ossl_provider_up_ref(actualtmp)) {
633 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
637 *actualprov = actualtmp;
642 * The provider is already in the store. Probably two threads
643 * independently initialised their own provider objects with the same
644 * name and raced to put them in the store. This thread lost. We
645 * deactivate the one we just created and use the one that already
647 * If we get here then we know we did not create provider children
648 * above, so we inform ossl_provider_deactivate not to attempt to remove
651 ossl_provider_deactivate(prov, 0);
652 ossl_provider_free(prov);
658 CRYPTO_THREAD_unlock(store->lock);
659 if (actualprov != NULL)
660 ossl_provider_free(actualtmp);
664 void ossl_provider_free(OSSL_PROVIDER *prov)
669 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
672 * When the refcount drops to zero, we clean up the provider.
673 * Note that this also does teardown, which may seem late,
674 * considering that init happens on first activation. However,
675 * there may be other structures hanging on to the provider after
676 * the last deactivation and may therefore need full access to the
677 * provider's services. Therefore, we deinit late.
680 if (prov->flag_initialized) {
681 ossl_provider_teardown(prov);
682 #ifndef OPENSSL_NO_ERR
684 if (prov->error_strings != NULL) {
685 ERR_unload_strings(prov->error_lib, prov->error_strings);
686 OPENSSL_free(prov->error_strings);
687 prov->error_strings = NULL;
691 OPENSSL_free(prov->operation_bits);
692 prov->operation_bits = NULL;
693 prov->operation_bits_sz = 0;
694 prov->flag_initialized = 0;
699 * We deregister thread handling whether or not the provider was
700 * initialized. If init was attempted but was not successful then
701 * the provider may still have registered a thread handler.
703 ossl_init_thread_deregister(prov);
704 DSO_free(prov->module);
706 OPENSSL_free(prov->name);
707 OPENSSL_free(prov->path);
708 sk_INFOPAIR_pop_free(prov->parameters, infopair_free);
709 CRYPTO_THREAD_lock_free(prov->opbits_lock);
710 CRYPTO_THREAD_lock_free(prov->flag_lock);
712 CRYPTO_THREAD_lock_free(prov->refcnt_lock);
717 else if (prov->ischild) {
718 ossl_provider_free_parent(prov, 0);
725 int ossl_provider_set_module_path(OSSL_PROVIDER *prov, const char *module_path)
727 OPENSSL_free(prov->path);
729 if (module_path == NULL)
731 if ((prov->path = OPENSSL_strdup(module_path)) != NULL)
733 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
737 static int infopair_add(STACK_OF(INFOPAIR) **infopairsk, const char *name,
740 INFOPAIR *pair = NULL;
742 if ((pair = OPENSSL_zalloc(sizeof(*pair))) != NULL
743 && (*infopairsk != NULL
744 || (*infopairsk = sk_INFOPAIR_new_null()) != NULL)
745 && (pair->name = OPENSSL_strdup(name)) != NULL
746 && (pair->value = OPENSSL_strdup(value)) != NULL
747 && sk_INFOPAIR_push(*infopairsk, pair) > 0)
751 OPENSSL_free(pair->name);
752 OPENSSL_free(pair->value);
755 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
759 int ossl_provider_add_parameter(OSSL_PROVIDER *prov,
760 const char *name, const char *value)
762 return infopair_add(&prov->parameters, name, value);
765 int ossl_provider_info_add_parameter(OSSL_PROVIDER_INFO *provinfo,
769 return infopair_add(&provinfo->parameters, name, value);
773 * Provider activation.
775 * What "activation" means depends on the provider form; for built in
776 * providers (in the library or the application alike), the provider
777 * can already be considered to be loaded, all that's needed is to
778 * initialize it. However, for dynamically loadable provider modules,
779 * we must first load that module.
781 * Built in modules are distinguished from dynamically loaded modules
782 * with an already assigned init function.
784 static const OSSL_DISPATCH *core_dispatch; /* Define further down */
786 int OSSL_PROVIDER_set_default_search_path(OSSL_LIB_CTX *libctx,
789 struct provider_store_st *store;
793 p = OPENSSL_strdup(path);
795 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
799 if ((store = get_provider_store(libctx)) != NULL
800 && CRYPTO_THREAD_write_lock(store->default_path_lock)) {
801 OPENSSL_free(store->default_path);
802 store->default_path = p;
803 CRYPTO_THREAD_unlock(store->default_path_lock);
811 * Internal version that doesn't affect the store flags, and thereby avoid
812 * locking. Direct callers must remember to set the store flags when
815 static int provider_init(OSSL_PROVIDER *prov)
817 const OSSL_DISPATCH *provider_dispatch = NULL;
818 void *tmp_provctx = NULL; /* safety measure */
819 #ifndef OPENSSL_NO_ERR
821 OSSL_FUNC_provider_get_reason_strings_fn *p_get_reason_strings = NULL;
826 if (!ossl_assert(!prov->flag_initialized)) {
827 ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
832 * If the init function isn't set, it indicates that this provider is
835 if (prov->init_function == NULL) {
839 if (prov->module == NULL) {
840 char *allocated_path = NULL;
841 const char *module_path = NULL;
842 char *merged_path = NULL;
843 const char *load_dir = NULL;
844 char *allocated_load_dir = NULL;
845 struct provider_store_st *store;
847 if ((prov->module = DSO_new()) == NULL) {
848 /* DSO_new() generates an error already */
852 if ((store = get_provider_store(prov->libctx)) == NULL
853 || !CRYPTO_THREAD_read_lock(store->default_path_lock))
856 if (store->default_path != NULL) {
857 allocated_load_dir = OPENSSL_strdup(store->default_path);
858 CRYPTO_THREAD_unlock(store->default_path_lock);
859 if (allocated_load_dir == NULL) {
860 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
863 load_dir = allocated_load_dir;
865 CRYPTO_THREAD_unlock(store->default_path_lock);
868 if (load_dir == NULL) {
869 load_dir = ossl_safe_getenv("OPENSSL_MODULES");
870 if (load_dir == NULL)
871 load_dir = MODULESDIR;
874 DSO_ctrl(prov->module, DSO_CTRL_SET_FLAGS,
875 DSO_FLAG_NAME_TRANSLATION_EXT_ONLY, NULL);
877 module_path = prov->path;
878 if (module_path == NULL)
879 module_path = allocated_path =
880 DSO_convert_filename(prov->module, prov->name);
881 if (module_path != NULL)
882 merged_path = DSO_merge(prov->module, module_path, load_dir);
884 if (merged_path == NULL
885 || (DSO_load(prov->module, merged_path, NULL, 0)) == NULL) {
886 DSO_free(prov->module);
890 OPENSSL_free(merged_path);
891 OPENSSL_free(allocated_path);
892 OPENSSL_free(allocated_load_dir);
895 if (prov->module != NULL)
896 prov->init_function = (OSSL_provider_init_fn *)
897 DSO_bind_func(prov->module, "OSSL_provider_init");
901 /* Call the initialise function for the provider. */
902 if (prov->init_function == NULL
903 || !prov->init_function((OSSL_CORE_HANDLE *)prov, core_dispatch,
904 &provider_dispatch, &tmp_provctx)) {
905 ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_INIT_FAIL,
906 "name=%s", prov->name);
909 prov->provctx = tmp_provctx;
910 prov->dispatch = provider_dispatch;
912 for (; provider_dispatch->function_id != 0; provider_dispatch++) {
913 switch (provider_dispatch->function_id) {
914 case OSSL_FUNC_PROVIDER_TEARDOWN:
916 OSSL_FUNC_provider_teardown(provider_dispatch);
918 case OSSL_FUNC_PROVIDER_GETTABLE_PARAMS:
919 prov->gettable_params =
920 OSSL_FUNC_provider_gettable_params(provider_dispatch);
922 case OSSL_FUNC_PROVIDER_GET_PARAMS:
924 OSSL_FUNC_provider_get_params(provider_dispatch);
926 case OSSL_FUNC_PROVIDER_SELF_TEST:
928 OSSL_FUNC_provider_self_test(provider_dispatch);
930 case OSSL_FUNC_PROVIDER_GET_CAPABILITIES:
931 prov->get_capabilities =
932 OSSL_FUNC_provider_get_capabilities(provider_dispatch);
934 case OSSL_FUNC_PROVIDER_QUERY_OPERATION:
935 prov->query_operation =
936 OSSL_FUNC_provider_query_operation(provider_dispatch);
938 case OSSL_FUNC_PROVIDER_UNQUERY_OPERATION:
939 prov->unquery_operation =
940 OSSL_FUNC_provider_unquery_operation(provider_dispatch);
942 #ifndef OPENSSL_NO_ERR
944 case OSSL_FUNC_PROVIDER_GET_REASON_STRINGS:
945 p_get_reason_strings =
946 OSSL_FUNC_provider_get_reason_strings(provider_dispatch);
953 #ifndef OPENSSL_NO_ERR
955 if (p_get_reason_strings != NULL) {
956 const OSSL_ITEM *reasonstrings = p_get_reason_strings(prov->provctx);
960 * ERR_load_strings() handles ERR_STRING_DATA rather than OSSL_ITEM,
961 * although they are essentially the same type.
962 * Furthermore, ERR_load_strings() patches the array's error number
963 * with the error library number, so we need to make a copy of that
967 while (reasonstrings[cnt].id != 0) {
968 if (ERR_GET_LIB(reasonstrings[cnt].id) != 0)
972 cnt++; /* One for the terminating item */
974 /* Allocate one extra item for the "library" name */
975 prov->error_strings =
976 OPENSSL_zalloc(sizeof(ERR_STRING_DATA) * (cnt + 1));
977 if (prov->error_strings == NULL)
981 * Set the "library" name.
983 prov->error_strings[0].error = ERR_PACK(prov->error_lib, 0, 0);
984 prov->error_strings[0].string = prov->name;
986 * Copy reasonstrings item 0..cnt-1 to prov->error_trings positions
989 for (cnt2 = 1; cnt2 <= cnt; cnt2++) {
990 prov->error_strings[cnt2].error = (int)reasonstrings[cnt2-1].id;
991 prov->error_strings[cnt2].string = reasonstrings[cnt2-1].ptr;
994 ERR_load_strings(prov->error_lib, prov->error_strings);
999 /* With this flag set, this provider has become fully "loaded". */
1000 prov->flag_initialized = 1;
1008 * Deactivate a provider. If upcalls is 0 then we suppress any upcalls to a
1009 * parent provider. If removechildren is 0 then we suppress any calls to remove
1011 * Return -1 on failure and the activation count on success
1013 static int provider_deactivate(OSSL_PROVIDER *prov, int upcalls,
1017 struct provider_store_st *store;
1022 if (!ossl_assert(prov != NULL))
1025 store = get_provider_store(prov->libctx);
1029 if (!CRYPTO_THREAD_read_lock(store->lock))
1031 if (!CRYPTO_THREAD_write_lock(prov->flag_lock)) {
1032 CRYPTO_THREAD_unlock(store->lock);
1037 if (prov->activatecnt >= 2 && prov->ischild && upcalls) {
1039 * We have had a direct activation in this child libctx so we need to
1040 * now down the ref count in the parent provider. We do the actual down
1041 * ref outside of the flag_lock, since it could involve getting other
1048 if ((count = --prov->activatecnt) < 1)
1049 prov->flag_activated = 0;
1055 CRYPTO_THREAD_unlock(prov->flag_lock);
1058 if (removechildren) {
1059 int i, max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1060 OSSL_PROVIDER_CHILD_CB *child_cb;
1062 for (i = 0; i < max; i++) {
1063 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1064 child_cb->remove_cb((OSSL_CORE_HANDLE *)prov, child_cb->cbdata);
1068 CRYPTO_THREAD_unlock(store->lock);
1071 ossl_provider_free_parent(prov, 1);
1074 /* We don't deinit here, that's done in ossl_provider_free() */
1079 * Activate a provider.
1080 * Return -1 on failure and the activation count on success
1082 static int provider_activate(OSSL_PROVIDER *prov, int lock, int upcalls)
1085 struct provider_store_st *store;
1086 int ret = 1, createchildren = 0;
1088 store = prov->store;
1090 * If the provider hasn't been added to the store, then we don't need
1091 * any locks because we've not shared it with other threads.
1093 if (store == NULL) {
1095 if (!provider_init(prov))
1100 if (prov->ischild && upcalls && !ossl_provider_up_ref_parent(prov, 1))
1104 if (lock && !CRYPTO_THREAD_read_lock(store->lock)) {
1106 if (prov->ischild && upcalls)
1107 ossl_provider_free_parent(prov, 1);
1112 if (lock && !CRYPTO_THREAD_write_lock(prov->flag_lock)) {
1113 CRYPTO_THREAD_unlock(store->lock);
1115 if (prov->ischild && upcalls)
1116 ossl_provider_free_parent(prov, 1);
1121 count = ++prov->activatecnt;
1122 prov->flag_activated = 1;
1124 if (prov->activatecnt == 1 && store != NULL)
1128 CRYPTO_THREAD_unlock(prov->flag_lock);
1130 ret = create_provider_children(prov);
1132 CRYPTO_THREAD_unlock(store->lock);
1140 static int provider_flush_store_cache(const OSSL_PROVIDER *prov)
1142 struct provider_store_st *store;
1145 if ((store = get_provider_store(prov->libctx)) == NULL)
1148 if (!CRYPTO_THREAD_read_lock(store->lock))
1150 freeing = store->freeing;
1151 CRYPTO_THREAD_unlock(store->lock);
1154 return evp_method_store_flush(prov->libctx);
1158 int ossl_provider_activate(OSSL_PROVIDER *prov, int upcalls, int aschild)
1166 * If aschild is true, then we only actually do the activation if the
1167 * provider is a child. If its not, this is still success.
1169 if (aschild && !prov->ischild)
1172 if ((count = provider_activate(prov, 1, upcalls)) > 0)
1173 return count == 1 ? provider_flush_store_cache(prov) : 1;
1178 int ossl_provider_deactivate(OSSL_PROVIDER *prov, int removechildren)
1183 || (count = provider_deactivate(prov, 1, removechildren)) < 0)
1185 return count == 0 ? provider_flush_store_cache(prov) : 1;
1188 void *ossl_provider_ctx(const OSSL_PROVIDER *prov)
1190 return prov->provctx;
1194 * This function only does something once when store->use_fallbacks == 1,
1195 * and then sets store->use_fallbacks = 0, so the second call and so on is
1196 * effectively a no-op.
1198 static int provider_activate_fallbacks(struct provider_store_st *store)
1201 int activated_fallback_count = 0;
1203 const OSSL_PROVIDER_INFO *p;
1205 if (!CRYPTO_THREAD_read_lock(store->lock))
1207 use_fallbacks = store->use_fallbacks;
1208 CRYPTO_THREAD_unlock(store->lock);
1212 if (!CRYPTO_THREAD_write_lock(store->lock))
1214 /* Check again, just in case another thread changed it */
1215 use_fallbacks = store->use_fallbacks;
1216 if (!use_fallbacks) {
1217 CRYPTO_THREAD_unlock(store->lock);
1221 for (p = ossl_predefined_providers; p->name != NULL; p++) {
1222 OSSL_PROVIDER *prov = NULL;
1224 if (!p->is_fallback)
1227 * We use the internal constructor directly here,
1228 * otherwise we get a call loop
1230 prov = provider_new(p->name, p->init, NULL);
1233 prov->libctx = store->libctx;
1235 prov->error_lib = ERR_get_next_error_library();
1239 * We are calling provider_activate while holding the store lock. This
1240 * means the init function will be called while holding a lock. Normally
1241 * we try to avoid calling a user callback while holding a lock.
1242 * However, fallbacks are never third party providers so we accept this.
1244 if (provider_activate(prov, 0, 0) < 0) {
1245 ossl_provider_free(prov);
1248 prov->store = store;
1249 if (sk_OSSL_PROVIDER_push(store->providers, prov) == 0) {
1250 ossl_provider_free(prov);
1253 activated_fallback_count++;
1256 if (activated_fallback_count > 0) {
1257 store->use_fallbacks = 0;
1261 CRYPTO_THREAD_unlock(store->lock);
1265 int ossl_provider_doall_activated(OSSL_LIB_CTX *ctx,
1266 int (*cb)(OSSL_PROVIDER *provider,
1270 int ret = 0, curr, max, ref = 0;
1271 struct provider_store_st *store = get_provider_store(ctx);
1272 STACK_OF(OSSL_PROVIDER) *provs = NULL;
1276 * Make sure any providers are loaded from config before we try to use
1279 if (ossl_lib_ctx_is_default(ctx))
1280 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
1285 if (!provider_activate_fallbacks(store))
1289 * Under lock, grab a copy of the provider list and up_ref each
1290 * provider so that they don't disappear underneath us.
1292 if (!CRYPTO_THREAD_read_lock(store->lock))
1294 provs = sk_OSSL_PROVIDER_dup(store->providers);
1295 if (provs == NULL) {
1296 CRYPTO_THREAD_unlock(store->lock);
1299 max = sk_OSSL_PROVIDER_num(provs);
1301 * We work backwards through the stack so that we can safely delete items
1304 for (curr = max - 1; curr >= 0; curr--) {
1305 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1307 if (!CRYPTO_THREAD_write_lock(prov->flag_lock))
1309 if (prov->flag_activated) {
1311 * We call CRYPTO_UP_REF directly rather than ossl_provider_up_ref
1312 * to avoid upping the ref count on the parent provider, which we
1313 * must not do while holding locks.
1315 if (CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock) <= 0) {
1316 CRYPTO_THREAD_unlock(prov->flag_lock);
1320 * It's already activated, but we up the activated count to ensure
1321 * it remains activated until after we've called the user callback.
1322 * We do this with no locking (because we already hold the locks)
1323 * and no upcalls (which must not be called when locks are held). In
1324 * theory this could mean the parent provider goes inactive, whilst
1325 * still activated in the child for a short period. That's ok.
1327 if (provider_activate(prov, 0, 0) < 0) {
1328 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
1329 CRYPTO_THREAD_unlock(prov->flag_lock);
1333 sk_OSSL_PROVIDER_delete(provs, curr);
1336 CRYPTO_THREAD_unlock(prov->flag_lock);
1338 CRYPTO_THREAD_unlock(store->lock);
1341 * Now, we sweep through all providers not under lock
1343 for (curr = 0; curr < max; curr++) {
1344 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1346 if (!cb(prov, cbdata))
1355 CRYPTO_THREAD_unlock(store->lock);
1358 * The pop_free call doesn't do what we want on an error condition. We
1359 * either start from the first item in the stack, or part way through if
1360 * we only processed some of the items.
1362 for (curr++; curr < max; curr++) {
1363 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1365 provider_deactivate(prov, 0, 1);
1367 * As above where we did the up-ref, we don't call ossl_provider_free
1368 * to avoid making upcalls. There should always be at least one ref
1369 * to the provider in the store, so this should never drop to 0.
1371 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
1373 * Not much we can do if this assert ever fails. So we don't use
1378 sk_OSSL_PROVIDER_free(provs);
1382 int OSSL_PROVIDER_available(OSSL_LIB_CTX *libctx, const char *name)
1384 OSSL_PROVIDER *prov = NULL;
1386 struct provider_store_st *store = get_provider_store(libctx);
1388 if (store == NULL || !provider_activate_fallbacks(store))
1391 prov = ossl_provider_find(libctx, name, 0);
1393 if (!CRYPTO_THREAD_read_lock(prov->flag_lock))
1395 available = prov->flag_activated;
1396 CRYPTO_THREAD_unlock(prov->flag_lock);
1397 ossl_provider_free(prov);
1402 /* Getters of Provider Object data */
1403 const char *ossl_provider_name(const OSSL_PROVIDER *prov)
1408 const DSO *ossl_provider_dso(const OSSL_PROVIDER *prov)
1410 return prov->module;
1413 const char *ossl_provider_module_name(const OSSL_PROVIDER *prov)
1418 return DSO_get_filename(prov->module);
1422 const char *ossl_provider_module_path(const OSSL_PROVIDER *prov)
1427 /* FIXME: Ensure it's a full path */
1428 return DSO_get_filename(prov->module);
1432 void *ossl_provider_prov_ctx(const OSSL_PROVIDER *prov)
1435 return prov->provctx;
1440 const OSSL_DISPATCH *ossl_provider_get0_dispatch(const OSSL_PROVIDER *prov)
1443 return prov->dispatch;
1448 OSSL_LIB_CTX *ossl_provider_libctx(const OSSL_PROVIDER *prov)
1450 return prov != NULL ? prov->libctx : NULL;
1453 /* Wrappers around calls to the provider */
1454 void ossl_provider_teardown(const OSSL_PROVIDER *prov)
1456 if (prov->teardown != NULL
1461 prov->teardown(prov->provctx);
1464 const OSSL_PARAM *ossl_provider_gettable_params(const OSSL_PROVIDER *prov)
1466 return prov->gettable_params == NULL
1467 ? NULL : prov->gettable_params(prov->provctx);
1470 int ossl_provider_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
1472 return prov->get_params == NULL
1473 ? 0 : prov->get_params(prov->provctx, params);
1476 int ossl_provider_self_test(const OSSL_PROVIDER *prov)
1480 if (prov->self_test == NULL)
1482 ret = prov->self_test(prov->provctx);
1484 (void)provider_flush_store_cache(prov);
1488 int ossl_provider_get_capabilities(const OSSL_PROVIDER *prov,
1489 const char *capability,
1493 return prov->get_capabilities == NULL
1494 ? 1 : prov->get_capabilities(prov->provctx, capability, cb, arg);
1497 const OSSL_ALGORITHM *ossl_provider_query_operation(const OSSL_PROVIDER *prov,
1501 const OSSL_ALGORITHM *res;
1503 if (prov->query_operation == NULL)
1505 res = prov->query_operation(prov->provctx, operation_id, no_cache);
1506 #if defined(OPENSSL_NO_CACHED_FETCH)
1507 /* Forcing the non-caching of queries */
1508 if (no_cache != NULL)
1514 void ossl_provider_unquery_operation(const OSSL_PROVIDER *prov,
1516 const OSSL_ALGORITHM *algs)
1518 if (prov->unquery_operation != NULL)
1519 prov->unquery_operation(prov->provctx, operation_id, algs);
1522 int ossl_provider_clear_all_operation_bits(OSSL_LIB_CTX *libctx)
1524 struct provider_store_st *store;
1525 OSSL_PROVIDER *provider;
1526 int i, num, res = 1;
1528 if ((store = get_provider_store(libctx)) != NULL) {
1529 if (!CRYPTO_THREAD_read_lock(store->lock))
1531 num = sk_OSSL_PROVIDER_num(store->providers);
1532 for (i = 0; i < num; i++) {
1533 provider = sk_OSSL_PROVIDER_value(store->providers, i);
1534 if (!CRYPTO_THREAD_write_lock(provider->opbits_lock)) {
1538 if (provider->operation_bits != NULL)
1539 memset(provider->operation_bits, 0,
1540 provider->operation_bits_sz);
1541 CRYPTO_THREAD_unlock(provider->opbits_lock);
1543 CRYPTO_THREAD_unlock(store->lock);
1549 int ossl_provider_set_operation_bit(OSSL_PROVIDER *provider, size_t bitnum)
1551 size_t byte = bitnum / 8;
1552 unsigned char bit = (1 << (bitnum % 8)) & 0xFF;
1554 if (!CRYPTO_THREAD_write_lock(provider->opbits_lock))
1556 if (provider->operation_bits_sz <= byte) {
1557 unsigned char *tmp = OPENSSL_realloc(provider->operation_bits,
1561 CRYPTO_THREAD_unlock(provider->opbits_lock);
1562 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
1565 provider->operation_bits = tmp;
1566 memset(provider->operation_bits + provider->operation_bits_sz,
1567 '\0', byte + 1 - provider->operation_bits_sz);
1568 provider->operation_bits_sz = byte + 1;
1570 provider->operation_bits[byte] |= bit;
1571 CRYPTO_THREAD_unlock(provider->opbits_lock);
1575 int ossl_provider_test_operation_bit(OSSL_PROVIDER *provider, size_t bitnum,
1578 size_t byte = bitnum / 8;
1579 unsigned char bit = (1 << (bitnum % 8)) & 0xFF;
1581 if (!ossl_assert(result != NULL)) {
1582 ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
1587 if (!CRYPTO_THREAD_read_lock(provider->opbits_lock))
1589 if (provider->operation_bits_sz > byte)
1590 *result = ((provider->operation_bits[byte] & bit) != 0);
1591 CRYPTO_THREAD_unlock(provider->opbits_lock);
1596 const OSSL_CORE_HANDLE *ossl_provider_get_parent(OSSL_PROVIDER *prov)
1598 return prov->handle;
1601 int ossl_provider_is_child(const OSSL_PROVIDER *prov)
1603 return prov->ischild;
1606 int ossl_provider_set_child(OSSL_PROVIDER *prov, const OSSL_CORE_HANDLE *handle)
1608 prov->handle = handle;
1614 int ossl_provider_default_props_update(OSSL_LIB_CTX *libctx, const char *props)
1617 struct provider_store_st *store = NULL;
1619 OSSL_PROVIDER_CHILD_CB *child_cb;
1621 if ((store = get_provider_store(libctx)) == NULL)
1624 if (!CRYPTO_THREAD_read_lock(store->lock))
1627 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1628 for (i = 0; i < max; i++) {
1629 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1630 child_cb->global_props_cb(props, child_cb->cbdata);
1633 CRYPTO_THREAD_unlock(store->lock);
1638 static int ossl_provider_register_child_cb(const OSSL_CORE_HANDLE *handle,
1640 const OSSL_CORE_HANDLE *provider,
1643 const OSSL_CORE_HANDLE *provider,
1645 int (*global_props_cb)(
1651 * This is really an OSSL_PROVIDER that we created and cast to
1652 * OSSL_CORE_HANDLE originally. Therefore it is safe to cast it back.
1654 OSSL_PROVIDER *thisprov = (OSSL_PROVIDER *)handle;
1655 OSSL_PROVIDER *prov;
1656 OSSL_LIB_CTX *libctx = thisprov->libctx;
1657 struct provider_store_st *store = NULL;
1658 int ret = 0, i, max;
1659 OSSL_PROVIDER_CHILD_CB *child_cb;
1660 char *propsstr = NULL;
1662 if ((store = get_provider_store(libctx)) == NULL)
1665 child_cb = OPENSSL_malloc(sizeof(*child_cb));
1666 if (child_cb == NULL)
1668 child_cb->prov = thisprov;
1669 child_cb->create_cb = create_cb;
1670 child_cb->remove_cb = remove_cb;
1671 child_cb->global_props_cb = global_props_cb;
1672 child_cb->cbdata = cbdata;
1674 if (!CRYPTO_THREAD_write_lock(store->lock)) {
1675 OPENSSL_free(child_cb);
1678 propsstr = evp_get_global_properties_str(libctx, 0);
1680 if (propsstr != NULL) {
1681 global_props_cb(propsstr, cbdata);
1682 OPENSSL_free(propsstr);
1684 max = sk_OSSL_PROVIDER_num(store->providers);
1685 for (i = 0; i < max; i++) {
1688 prov = sk_OSSL_PROVIDER_value(store->providers, i);
1690 if (!CRYPTO_THREAD_read_lock(prov->flag_lock))
1692 activated = prov->flag_activated;
1693 CRYPTO_THREAD_unlock(prov->flag_lock);
1695 * We hold the store lock while calling the user callback. This means
1696 * that the user callback must be short and simple and not do anything
1697 * likely to cause a deadlock. We don't hold the flag_lock during this
1698 * call. In theory this means that another thread could deactivate it
1699 * while we are calling create. This is ok because the other thread
1700 * will also call remove_cb, but won't be able to do so until we release
1703 if (activated && !create_cb((OSSL_CORE_HANDLE *)prov, cbdata))
1708 ret = sk_OSSL_PROVIDER_CHILD_CB_push(store->child_cbs, child_cb);
1710 if (i != max || ret <= 0) {
1711 /* Failed during creation. Remove everything we just added */
1712 for (; i >= 0; i--) {
1713 prov = sk_OSSL_PROVIDER_value(store->providers, i);
1714 remove_cb((OSSL_CORE_HANDLE *)prov, cbdata);
1716 OPENSSL_free(child_cb);
1719 CRYPTO_THREAD_unlock(store->lock);
1724 static void ossl_provider_deregister_child_cb(const OSSL_CORE_HANDLE *handle)
1727 * This is really an OSSL_PROVIDER that we created and cast to
1728 * OSSL_CORE_HANDLE originally. Therefore it is safe to cast it back.
1730 OSSL_PROVIDER *thisprov = (OSSL_PROVIDER *)handle;
1731 OSSL_LIB_CTX *libctx = thisprov->libctx;
1732 struct provider_store_st *store = NULL;
1734 OSSL_PROVIDER_CHILD_CB *child_cb;
1736 if ((store = get_provider_store(libctx)) == NULL)
1739 if (!CRYPTO_THREAD_write_lock(store->lock))
1741 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1742 for (i = 0; i < max; i++) {
1743 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1744 if (child_cb->prov == thisprov) {
1745 /* Found an entry */
1746 sk_OSSL_PROVIDER_CHILD_CB_delete(store->child_cbs, i);
1747 OPENSSL_free(child_cb);
1751 CRYPTO_THREAD_unlock(store->lock);
1756 * Core functions for the provider
1757 * ===============================
1759 * This is the set of functions that the core makes available to the provider
1763 * This returns a list of Provider Object parameters with their types, for
1764 * discovery. We do not expect that many providers will use this, but one
1767 static const OSSL_PARAM param_types[] = {
1768 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_VERSION, OSSL_PARAM_UTF8_PTR, NULL, 0),
1769 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_PROV_NAME, OSSL_PARAM_UTF8_PTR,
1772 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_MODULE_FILENAME, OSSL_PARAM_UTF8_PTR,
1779 * Forward declare all the functions that are provided aa dispatch.
1780 * This ensures that the compiler will complain if they aren't defined
1781 * with the correct signature.
1783 static OSSL_FUNC_core_gettable_params_fn core_gettable_params;
1784 static OSSL_FUNC_core_get_params_fn core_get_params;
1785 static OSSL_FUNC_core_thread_start_fn core_thread_start;
1786 static OSSL_FUNC_core_get_libctx_fn core_get_libctx;
1788 static OSSL_FUNC_core_new_error_fn core_new_error;
1789 static OSSL_FUNC_core_set_error_debug_fn core_set_error_debug;
1790 static OSSL_FUNC_core_vset_error_fn core_vset_error;
1791 static OSSL_FUNC_core_set_error_mark_fn core_set_error_mark;
1792 static OSSL_FUNC_core_clear_last_error_mark_fn core_clear_last_error_mark;
1793 static OSSL_FUNC_core_pop_error_to_mark_fn core_pop_error_to_mark;
1794 static OSSL_FUNC_core_obj_add_sigid_fn core_obj_add_sigid;
1795 static OSSL_FUNC_core_obj_create_fn core_obj_create;
1798 static const OSSL_PARAM *core_gettable_params(const OSSL_CORE_HANDLE *handle)
1803 static int core_get_params(const OSSL_CORE_HANDLE *handle, OSSL_PARAM params[])
1808 * We created this object originally and we know it is actually an
1809 * OSSL_PROVIDER *, so the cast is safe
1811 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1813 if ((p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_CORE_VERSION)) != NULL)
1814 OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR);
1815 if ((p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_CORE_PROV_NAME)) != NULL)
1816 OSSL_PARAM_set_utf8_ptr(p, prov->name);
1819 if ((p = OSSL_PARAM_locate(params,
1820 OSSL_PROV_PARAM_CORE_MODULE_FILENAME)) != NULL)
1821 OSSL_PARAM_set_utf8_ptr(p, ossl_provider_module_path(prov));
1824 if (prov->parameters == NULL)
1827 for (i = 0; i < sk_INFOPAIR_num(prov->parameters); i++) {
1828 INFOPAIR *pair = sk_INFOPAIR_value(prov->parameters, i);
1830 if ((p = OSSL_PARAM_locate(params, pair->name)) != NULL)
1831 OSSL_PARAM_set_utf8_ptr(p, pair->value);
1836 static OPENSSL_CORE_CTX *core_get_libctx(const OSSL_CORE_HANDLE *handle)
1839 * We created this object originally and we know it is actually an
1840 * OSSL_PROVIDER *, so the cast is safe
1842 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1845 * Using ossl_provider_libctx would be wrong as that returns
1846 * NULL for |prov| == NULL and NULL libctx has a special meaning
1847 * that does not apply here. Here |prov| == NULL can happen only in
1848 * case of a coding error.
1850 assert(prov != NULL);
1851 return (OPENSSL_CORE_CTX *)prov->libctx;
1854 static int core_thread_start(const OSSL_CORE_HANDLE *handle,
1855 OSSL_thread_stop_handler_fn handfn,
1859 * We created this object originally and we know it is actually an
1860 * OSSL_PROVIDER *, so the cast is safe
1862 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1864 return ossl_init_thread_start(prov, arg, handfn);
1868 * The FIPS module inner provider doesn't implement these. They aren't
1869 * needed there, since the FIPS module upcalls are always the outer provider
1874 * These error functions should use |handle| to select the proper
1875 * library context to report in the correct error stack if error
1876 * stacks become tied to the library context.
1877 * We cannot currently do that since there's no support for it in the
1880 static void core_new_error(const OSSL_CORE_HANDLE *handle)
1885 static void core_set_error_debug(const OSSL_CORE_HANDLE *handle,
1886 const char *file, int line, const char *func)
1888 ERR_set_debug(file, line, func);
1891 static void core_vset_error(const OSSL_CORE_HANDLE *handle,
1892 uint32_t reason, const char *fmt, va_list args)
1895 * We created this object originally and we know it is actually an
1896 * OSSL_PROVIDER *, so the cast is safe
1898 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1901 * If the uppermost 8 bits are non-zero, it's an OpenSSL library
1902 * error and will be treated as such. Otherwise, it's a new style
1903 * provider error and will be treated as such.
1905 if (ERR_GET_LIB(reason) != 0) {
1906 ERR_vset_error(ERR_GET_LIB(reason), ERR_GET_REASON(reason), fmt, args);
1908 ERR_vset_error(prov->error_lib, (int)reason, fmt, args);
1912 static int core_set_error_mark(const OSSL_CORE_HANDLE *handle)
1914 return ERR_set_mark();
1917 static int core_clear_last_error_mark(const OSSL_CORE_HANDLE *handle)
1919 return ERR_clear_last_mark();
1922 static int core_pop_error_to_mark(const OSSL_CORE_HANDLE *handle)
1924 return ERR_pop_to_mark();
1927 static int core_obj_add_sigid(const OSSL_CORE_HANDLE *prov,
1928 const char *sign_name, const char *digest_name,
1929 const char *pkey_name)
1931 int sign_nid = OBJ_txt2nid(sign_name);
1932 int digest_nid = NID_undef;
1933 int pkey_nid = OBJ_txt2nid(pkey_name);
1935 if (digest_name != NULL && digest_name[0] != '\0'
1936 && (digest_nid = OBJ_txt2nid(digest_name)) == NID_undef)
1939 if (sign_nid == NID_undef)
1943 * Check if it already exists. This is a success if so (even if we don't
1944 * have nids for the digest/pkey)
1946 if (OBJ_find_sigid_algs(sign_nid, NULL, NULL))
1949 if (pkey_nid == NID_undef)
1952 return OBJ_add_sigid(sign_nid, digest_nid, pkey_nid);
1955 static int core_obj_create(const OSSL_CORE_HANDLE *prov, const char *oid,
1956 const char *sn, const char *ln)
1958 /* Check if it already exists and create it if not */
1959 return OBJ_txt2nid(oid) != NID_undef
1960 || OBJ_create(oid, sn, ln) != NID_undef;
1962 #endif /* FIPS_MODULE */
1965 * Functions provided by the core.
1967 static const OSSL_DISPATCH core_dispatch_[] = {
1968 { OSSL_FUNC_CORE_GETTABLE_PARAMS, (void (*)(void))core_gettable_params },
1969 { OSSL_FUNC_CORE_GET_PARAMS, (void (*)(void))core_get_params },
1970 { OSSL_FUNC_CORE_GET_LIBCTX, (void (*)(void))core_get_libctx },
1971 { OSSL_FUNC_CORE_THREAD_START, (void (*)(void))core_thread_start },
1973 { OSSL_FUNC_CORE_NEW_ERROR, (void (*)(void))core_new_error },
1974 { OSSL_FUNC_CORE_SET_ERROR_DEBUG, (void (*)(void))core_set_error_debug },
1975 { OSSL_FUNC_CORE_VSET_ERROR, (void (*)(void))core_vset_error },
1976 { OSSL_FUNC_CORE_SET_ERROR_MARK, (void (*)(void))core_set_error_mark },
1977 { OSSL_FUNC_CORE_CLEAR_LAST_ERROR_MARK,
1978 (void (*)(void))core_clear_last_error_mark },
1979 { OSSL_FUNC_CORE_POP_ERROR_TO_MARK, (void (*)(void))core_pop_error_to_mark },
1980 { OSSL_FUNC_BIO_NEW_FILE, (void (*)(void))ossl_core_bio_new_file },
1981 { OSSL_FUNC_BIO_NEW_MEMBUF, (void (*)(void))ossl_core_bio_new_mem_buf },
1982 { OSSL_FUNC_BIO_READ_EX, (void (*)(void))ossl_core_bio_read_ex },
1983 { OSSL_FUNC_BIO_WRITE_EX, (void (*)(void))ossl_core_bio_write_ex },
1984 { OSSL_FUNC_BIO_GETS, (void (*)(void))ossl_core_bio_gets },
1985 { OSSL_FUNC_BIO_PUTS, (void (*)(void))ossl_core_bio_puts },
1986 { OSSL_FUNC_BIO_CTRL, (void (*)(void))ossl_core_bio_ctrl },
1987 { OSSL_FUNC_BIO_UP_REF, (void (*)(void))ossl_core_bio_up_ref },
1988 { OSSL_FUNC_BIO_FREE, (void (*)(void))ossl_core_bio_free },
1989 { OSSL_FUNC_BIO_VPRINTF, (void (*)(void))ossl_core_bio_vprintf },
1990 { OSSL_FUNC_BIO_VSNPRINTF, (void (*)(void))BIO_vsnprintf },
1991 { OSSL_FUNC_SELF_TEST_CB, (void (*)(void))OSSL_SELF_TEST_get_callback },
1992 { OSSL_FUNC_GET_ENTROPY, (void (*)(void))ossl_rand_get_entropy },
1993 { OSSL_FUNC_CLEANUP_ENTROPY, (void (*)(void))ossl_rand_cleanup_entropy },
1994 { OSSL_FUNC_GET_NONCE, (void (*)(void))ossl_rand_get_nonce },
1995 { OSSL_FUNC_CLEANUP_NONCE, (void (*)(void))ossl_rand_cleanup_nonce },
1997 { OSSL_FUNC_CRYPTO_MALLOC, (void (*)(void))CRYPTO_malloc },
1998 { OSSL_FUNC_CRYPTO_ZALLOC, (void (*)(void))CRYPTO_zalloc },
1999 { OSSL_FUNC_CRYPTO_FREE, (void (*)(void))CRYPTO_free },
2000 { OSSL_FUNC_CRYPTO_CLEAR_FREE, (void (*)(void))CRYPTO_clear_free },
2001 { OSSL_FUNC_CRYPTO_REALLOC, (void (*)(void))CRYPTO_realloc },
2002 { OSSL_FUNC_CRYPTO_CLEAR_REALLOC, (void (*)(void))CRYPTO_clear_realloc },
2003 { OSSL_FUNC_CRYPTO_SECURE_MALLOC, (void (*)(void))CRYPTO_secure_malloc },
2004 { OSSL_FUNC_CRYPTO_SECURE_ZALLOC, (void (*)(void))CRYPTO_secure_zalloc },
2005 { OSSL_FUNC_CRYPTO_SECURE_FREE, (void (*)(void))CRYPTO_secure_free },
2006 { OSSL_FUNC_CRYPTO_SECURE_CLEAR_FREE,
2007 (void (*)(void))CRYPTO_secure_clear_free },
2008 { OSSL_FUNC_CRYPTO_SECURE_ALLOCATED,
2009 (void (*)(void))CRYPTO_secure_allocated },
2010 { OSSL_FUNC_OPENSSL_CLEANSE, (void (*)(void))OPENSSL_cleanse },
2012 { OSSL_FUNC_PROVIDER_REGISTER_CHILD_CB,
2013 (void (*)(void))ossl_provider_register_child_cb },
2014 { OSSL_FUNC_PROVIDER_DEREGISTER_CHILD_CB,
2015 (void (*)(void))ossl_provider_deregister_child_cb },
2016 { OSSL_FUNC_PROVIDER_NAME,
2017 (void (*)(void))OSSL_PROVIDER_get0_name },
2018 { OSSL_FUNC_PROVIDER_GET0_PROVIDER_CTX,
2019 (void (*)(void))OSSL_PROVIDER_get0_provider_ctx },
2020 { OSSL_FUNC_PROVIDER_GET0_DISPATCH,
2021 (void (*)(void))OSSL_PROVIDER_get0_dispatch },
2022 { OSSL_FUNC_PROVIDER_UP_REF,
2023 (void (*)(void))provider_up_ref_intern },
2024 { OSSL_FUNC_PROVIDER_FREE,
2025 (void (*)(void))provider_free_intern },
2026 { OSSL_FUNC_CORE_OBJ_ADD_SIGID, (void (*)(void))core_obj_add_sigid },
2027 { OSSL_FUNC_CORE_OBJ_CREATE, (void (*)(void))core_obj_create },
2031 static const OSSL_DISPATCH *core_dispatch = core_dispatch_;