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);
509 * We assume that the requested provider does not already exist in the store.
510 * The caller should check. If it does exist then adding it to the store later
513 OSSL_PROVIDER *ossl_provider_new(OSSL_LIB_CTX *libctx, const char *name,
514 OSSL_provider_init_fn *init_function,
517 struct provider_store_st *store = NULL;
518 OSSL_PROVIDER_INFO template;
519 OSSL_PROVIDER *prov = NULL;
521 if ((store = get_provider_store(libctx)) == NULL)
524 memset(&template, 0, sizeof(template));
525 if (init_function == NULL) {
526 const OSSL_PROVIDER_INFO *p;
529 /* Check if this is a predefined builtin provider */
530 for (p = ossl_predefined_providers; p->name != NULL; p++) {
531 if (strcmp(p->name, name) == 0) {
536 if (p->name == NULL) {
537 /* Check if this is a user added builtin provider */
538 if (!CRYPTO_THREAD_read_lock(store->lock))
540 for (i = 0, p = store->provinfo; i < store->numprovinfo; p++, i++) {
541 if (strcmp(p->name, name) == 0) {
546 CRYPTO_THREAD_unlock(store->lock);
549 template.init = init_function;
552 /* provider_new() generates an error, so no need here */
553 if ((prov = provider_new(name, template.init, template.parameters)) == NULL)
556 prov->libctx = libctx;
558 prov->error_lib = ERR_get_next_error_library();
562 * At this point, the provider is only partially "loaded". To be
563 * fully "loaded", ossl_provider_activate() must also be called and it must
564 * then be added to the provider store.
570 /* Assumes that the store lock is held */
571 static int create_provider_children(OSSL_PROVIDER *prov)
575 struct provider_store_st *store = prov->store;
576 OSSL_PROVIDER_CHILD_CB *child_cb;
579 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
580 for (i = 0; i < max; i++) {
582 * This is newly activated (activatecnt == 1), so we need to
583 * create child providers as necessary.
585 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
586 ret &= child_cb->create_cb((OSSL_CORE_HANDLE *)prov, child_cb->cbdata);
593 int ossl_provider_add_to_store(OSSL_PROVIDER *prov, OSSL_PROVIDER **actualprov,
594 int retain_fallbacks)
596 struct provider_store_st *store;
598 OSSL_PROVIDER tmpl = { 0, };
599 OSSL_PROVIDER *actualtmp = NULL;
601 if ((store = get_provider_store(prov->libctx)) == NULL)
604 if (!CRYPTO_THREAD_write_lock(store->lock))
607 tmpl.name = (char *)prov->name;
608 idx = sk_OSSL_PROVIDER_find(store->providers, &tmpl);
612 actualtmp = sk_OSSL_PROVIDER_value(store->providers, idx);
615 if (sk_OSSL_PROVIDER_push(store->providers, prov) == 0)
618 if (!create_provider_children(prov)) {
619 sk_OSSL_PROVIDER_delete_ptr(store->providers, prov);
622 if (!retain_fallbacks)
623 store->use_fallbacks = 0;
626 CRYPTO_THREAD_unlock(store->lock);
628 if (actualprov != NULL) {
629 if (!ossl_provider_up_ref(actualtmp)) {
630 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
634 *actualprov = actualtmp;
639 * The provider is already in the store. Probably two threads
640 * independently initialised their own provider objects with the same
641 * name and raced to put them in the store. This thread lost. We
642 * deactivate the one we just created and use the one that already
644 * If we get here then we know we did not create provider children
645 * above, so we inform ossl_provider_deactivate not to attempt to remove
648 ossl_provider_deactivate(prov, 0);
649 ossl_provider_free(prov);
655 CRYPTO_THREAD_unlock(store->lock);
656 if (actualprov != NULL)
657 ossl_provider_free(actualtmp);
661 void ossl_provider_free(OSSL_PROVIDER *prov)
666 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
669 * When the refcount drops to zero, we clean up the provider.
670 * Note that this also does teardown, which may seem late,
671 * considering that init happens on first activation. However,
672 * there may be other structures hanging on to the provider after
673 * the last deactivation and may therefore need full access to the
674 * provider's services. Therefore, we deinit late.
677 if (prov->flag_initialized) {
678 ossl_provider_teardown(prov);
679 #ifndef OPENSSL_NO_ERR
681 if (prov->error_strings != NULL) {
682 ERR_unload_strings(prov->error_lib, prov->error_strings);
683 OPENSSL_free(prov->error_strings);
684 prov->error_strings = NULL;
688 OPENSSL_free(prov->operation_bits);
689 prov->operation_bits = NULL;
690 prov->operation_bits_sz = 0;
691 prov->flag_initialized = 0;
696 * We deregister thread handling whether or not the provider was
697 * initialized. If init was attempted but was not successful then
698 * the provider may still have registered a thread handler.
700 ossl_init_thread_deregister(prov);
701 DSO_free(prov->module);
703 OPENSSL_free(prov->name);
704 OPENSSL_free(prov->path);
705 sk_INFOPAIR_pop_free(prov->parameters, infopair_free);
706 CRYPTO_THREAD_lock_free(prov->opbits_lock);
707 CRYPTO_THREAD_lock_free(prov->flag_lock);
709 CRYPTO_THREAD_lock_free(prov->refcnt_lock);
714 else if (prov->ischild) {
715 ossl_provider_free_parent(prov, 0);
722 int ossl_provider_set_module_path(OSSL_PROVIDER *prov, const char *module_path)
724 OPENSSL_free(prov->path);
726 if (module_path == NULL)
728 if ((prov->path = OPENSSL_strdup(module_path)) != NULL)
730 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
734 static int infopair_add(STACK_OF(INFOPAIR) **infopairsk, const char *name,
737 INFOPAIR *pair = NULL;
739 if ((pair = OPENSSL_zalloc(sizeof(*pair))) != NULL
740 && (*infopairsk != NULL
741 || (*infopairsk = sk_INFOPAIR_new_null()) != NULL)
742 && (pair->name = OPENSSL_strdup(name)) != NULL
743 && (pair->value = OPENSSL_strdup(value)) != NULL
744 && sk_INFOPAIR_push(*infopairsk, pair) > 0)
748 OPENSSL_free(pair->name);
749 OPENSSL_free(pair->value);
752 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
756 int ossl_provider_add_parameter(OSSL_PROVIDER *prov,
757 const char *name, const char *value)
759 return infopair_add(&prov->parameters, name, value);
762 int ossl_provider_info_add_parameter(OSSL_PROVIDER_INFO *provinfo,
766 return infopair_add(&provinfo->parameters, name, value);
770 * Provider activation.
772 * What "activation" means depends on the provider form; for built in
773 * providers (in the library or the application alike), the provider
774 * can already be considered to be loaded, all that's needed is to
775 * initialize it. However, for dynamically loadable provider modules,
776 * we must first load that module.
778 * Built in modules are distinguished from dynamically loaded modules
779 * with an already assigned init function.
781 static const OSSL_DISPATCH *core_dispatch; /* Define further down */
783 int OSSL_PROVIDER_set_default_search_path(OSSL_LIB_CTX *libctx,
786 struct provider_store_st *store;
790 p = OPENSSL_strdup(path);
792 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
796 if ((store = get_provider_store(libctx)) != NULL
797 && CRYPTO_THREAD_write_lock(store->default_path_lock)) {
798 OPENSSL_free(store->default_path);
799 store->default_path = p;
800 CRYPTO_THREAD_unlock(store->default_path_lock);
808 * Internal version that doesn't affect the store flags, and thereby avoid
809 * locking. Direct callers must remember to set the store flags when
812 static int provider_init(OSSL_PROVIDER *prov)
814 const OSSL_DISPATCH *provider_dispatch = NULL;
815 void *tmp_provctx = NULL; /* safety measure */
816 #ifndef OPENSSL_NO_ERR
818 OSSL_FUNC_provider_get_reason_strings_fn *p_get_reason_strings = NULL;
823 if (!ossl_assert(!prov->flag_initialized)) {
824 ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
829 * If the init function isn't set, it indicates that this provider is
832 if (prov->init_function == NULL) {
836 if (prov->module == NULL) {
837 char *allocated_path = NULL;
838 const char *module_path = NULL;
839 char *merged_path = NULL;
840 const char *load_dir = NULL;
841 char *allocated_load_dir = NULL;
842 struct provider_store_st *store;
844 if ((prov->module = DSO_new()) == NULL) {
845 /* DSO_new() generates an error already */
849 if ((store = get_provider_store(prov->libctx)) == NULL
850 || !CRYPTO_THREAD_read_lock(store->default_path_lock))
853 if (store->default_path != NULL) {
854 allocated_load_dir = OPENSSL_strdup(store->default_path);
855 CRYPTO_THREAD_unlock(store->default_path_lock);
856 if (allocated_load_dir == NULL) {
857 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
860 load_dir = allocated_load_dir;
862 CRYPTO_THREAD_unlock(store->default_path_lock);
865 if (load_dir == NULL) {
866 load_dir = ossl_safe_getenv("OPENSSL_MODULES");
867 if (load_dir == NULL)
868 load_dir = MODULESDIR;
871 DSO_ctrl(prov->module, DSO_CTRL_SET_FLAGS,
872 DSO_FLAG_NAME_TRANSLATION_EXT_ONLY, NULL);
874 module_path = prov->path;
875 if (module_path == NULL)
876 module_path = allocated_path =
877 DSO_convert_filename(prov->module, prov->name);
878 if (module_path != NULL)
879 merged_path = DSO_merge(prov->module, module_path, load_dir);
881 if (merged_path == NULL
882 || (DSO_load(prov->module, merged_path, NULL, 0)) == NULL) {
883 DSO_free(prov->module);
887 OPENSSL_free(merged_path);
888 OPENSSL_free(allocated_path);
889 OPENSSL_free(allocated_load_dir);
892 if (prov->module != NULL)
893 prov->init_function = (OSSL_provider_init_fn *)
894 DSO_bind_func(prov->module, "OSSL_provider_init");
898 /* Call the initialise function for the provider. */
899 if (prov->init_function == NULL
900 || !prov->init_function((OSSL_CORE_HANDLE *)prov, core_dispatch,
901 &provider_dispatch, &tmp_provctx)) {
902 ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_INIT_FAIL,
903 "name=%s", prov->name);
906 prov->provctx = tmp_provctx;
907 prov->dispatch = provider_dispatch;
909 for (; provider_dispatch->function_id != 0; provider_dispatch++) {
910 switch (provider_dispatch->function_id) {
911 case OSSL_FUNC_PROVIDER_TEARDOWN:
913 OSSL_FUNC_provider_teardown(provider_dispatch);
915 case OSSL_FUNC_PROVIDER_GETTABLE_PARAMS:
916 prov->gettable_params =
917 OSSL_FUNC_provider_gettable_params(provider_dispatch);
919 case OSSL_FUNC_PROVIDER_GET_PARAMS:
921 OSSL_FUNC_provider_get_params(provider_dispatch);
923 case OSSL_FUNC_PROVIDER_SELF_TEST:
925 OSSL_FUNC_provider_self_test(provider_dispatch);
927 case OSSL_FUNC_PROVIDER_GET_CAPABILITIES:
928 prov->get_capabilities =
929 OSSL_FUNC_provider_get_capabilities(provider_dispatch);
931 case OSSL_FUNC_PROVIDER_QUERY_OPERATION:
932 prov->query_operation =
933 OSSL_FUNC_provider_query_operation(provider_dispatch);
935 case OSSL_FUNC_PROVIDER_UNQUERY_OPERATION:
936 prov->unquery_operation =
937 OSSL_FUNC_provider_unquery_operation(provider_dispatch);
939 #ifndef OPENSSL_NO_ERR
941 case OSSL_FUNC_PROVIDER_GET_REASON_STRINGS:
942 p_get_reason_strings =
943 OSSL_FUNC_provider_get_reason_strings(provider_dispatch);
950 #ifndef OPENSSL_NO_ERR
952 if (p_get_reason_strings != NULL) {
953 const OSSL_ITEM *reasonstrings = p_get_reason_strings(prov->provctx);
957 * ERR_load_strings() handles ERR_STRING_DATA rather than OSSL_ITEM,
958 * although they are essentially the same type.
959 * Furthermore, ERR_load_strings() patches the array's error number
960 * with the error library number, so we need to make a copy of that
964 while (reasonstrings[cnt].id != 0) {
965 if (ERR_GET_LIB(reasonstrings[cnt].id) != 0)
969 cnt++; /* One for the terminating item */
971 /* Allocate one extra item for the "library" name */
972 prov->error_strings =
973 OPENSSL_zalloc(sizeof(ERR_STRING_DATA) * (cnt + 1));
974 if (prov->error_strings == NULL)
978 * Set the "library" name.
980 prov->error_strings[0].error = ERR_PACK(prov->error_lib, 0, 0);
981 prov->error_strings[0].string = prov->name;
983 * Copy reasonstrings item 0..cnt-1 to prov->error_trings positions
986 for (cnt2 = 1; cnt2 <= cnt; cnt2++) {
987 prov->error_strings[cnt2].error = (int)reasonstrings[cnt2-1].id;
988 prov->error_strings[cnt2].string = reasonstrings[cnt2-1].ptr;
991 ERR_load_strings(prov->error_lib, prov->error_strings);
996 /* With this flag set, this provider has become fully "loaded". */
997 prov->flag_initialized = 1;
1005 * Deactivate a provider. If upcalls is 0 then we suppress any upcalls to a
1006 * parent provider. If removechildren is 0 then we suppress any calls to remove
1008 * Return -1 on failure and the activation count on success
1010 static int provider_deactivate(OSSL_PROVIDER *prov, int upcalls,
1014 struct provider_store_st *store;
1019 if (!ossl_assert(prov != NULL))
1022 store = get_provider_store(prov->libctx);
1026 if (!CRYPTO_THREAD_read_lock(store->lock))
1028 if (!CRYPTO_THREAD_write_lock(prov->flag_lock)) {
1029 CRYPTO_THREAD_unlock(store->lock);
1034 if (prov->activatecnt >= 2 && prov->ischild && upcalls) {
1036 * We have had a direct activation in this child libctx so we need to
1037 * now down the ref count in the parent provider. We do the actual down
1038 * ref outside of the flag_lock, since it could involve getting other
1045 if ((count = --prov->activatecnt) < 1)
1046 prov->flag_activated = 0;
1052 CRYPTO_THREAD_unlock(prov->flag_lock);
1055 if (removechildren) {
1056 int i, max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1057 OSSL_PROVIDER_CHILD_CB *child_cb;
1059 for (i = 0; i < max; i++) {
1060 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1061 child_cb->remove_cb((OSSL_CORE_HANDLE *)prov, child_cb->cbdata);
1065 CRYPTO_THREAD_unlock(store->lock);
1068 ossl_provider_free_parent(prov, 1);
1071 /* We don't deinit here, that's done in ossl_provider_free() */
1076 * Activate a provider.
1077 * Return -1 on failure and the activation count on success
1079 static int provider_activate(OSSL_PROVIDER *prov, int lock, int upcalls)
1082 struct provider_store_st *store;
1083 int ret = 1, createchildren = 0;
1085 store = prov->store;
1087 * If the provider hasn't been added to the store, then we don't need
1088 * any locks because we've not shared it with other threads.
1090 if (store == NULL) {
1092 if (!provider_init(prov))
1097 if (prov->ischild && upcalls && !ossl_provider_up_ref_parent(prov, 1))
1101 if (lock && !CRYPTO_THREAD_read_lock(store->lock)) {
1103 if (prov->ischild && upcalls)
1104 ossl_provider_free_parent(prov, 1);
1109 if (lock && !CRYPTO_THREAD_write_lock(prov->flag_lock)) {
1110 CRYPTO_THREAD_unlock(store->lock);
1112 if (prov->ischild && upcalls)
1113 ossl_provider_free_parent(prov, 1);
1118 count = ++prov->activatecnt;
1119 prov->flag_activated = 1;
1121 if (prov->activatecnt == 1 && store != NULL)
1125 CRYPTO_THREAD_unlock(prov->flag_lock);
1127 ret = create_provider_children(prov);
1129 CRYPTO_THREAD_unlock(store->lock);
1137 static int provider_flush_store_cache(const OSSL_PROVIDER *prov)
1139 struct provider_store_st *store;
1142 if ((store = get_provider_store(prov->libctx)) == NULL)
1145 if (!CRYPTO_THREAD_read_lock(store->lock))
1147 freeing = store->freeing;
1148 CRYPTO_THREAD_unlock(store->lock);
1151 return evp_method_store_flush(prov->libctx);
1155 int ossl_provider_activate(OSSL_PROVIDER *prov, int upcalls, int aschild)
1163 * If aschild is true, then we only actually do the activation if the
1164 * provider is a child. If its not, this is still success.
1166 if (aschild && !prov->ischild)
1169 if ((count = provider_activate(prov, 1, upcalls)) > 0)
1170 return count == 1 ? provider_flush_store_cache(prov) : 1;
1175 int ossl_provider_deactivate(OSSL_PROVIDER *prov, int removechildren)
1180 || (count = provider_deactivate(prov, 1, removechildren)) < 0)
1182 return count == 0 ? provider_flush_store_cache(prov) : 1;
1185 void *ossl_provider_ctx(const OSSL_PROVIDER *prov)
1187 return prov->provctx;
1191 * This function only does something once when store->use_fallbacks == 1,
1192 * and then sets store->use_fallbacks = 0, so the second call and so on is
1193 * effectively a no-op.
1195 static int provider_activate_fallbacks(struct provider_store_st *store)
1198 int activated_fallback_count = 0;
1200 const OSSL_PROVIDER_INFO *p;
1202 if (!CRYPTO_THREAD_read_lock(store->lock))
1204 use_fallbacks = store->use_fallbacks;
1205 CRYPTO_THREAD_unlock(store->lock);
1209 if (!CRYPTO_THREAD_write_lock(store->lock))
1211 /* Check again, just in case another thread changed it */
1212 use_fallbacks = store->use_fallbacks;
1213 if (!use_fallbacks) {
1214 CRYPTO_THREAD_unlock(store->lock);
1218 for (p = ossl_predefined_providers; p->name != NULL; p++) {
1219 OSSL_PROVIDER *prov = NULL;
1221 if (!p->is_fallback)
1224 * We use the internal constructor directly here,
1225 * otherwise we get a call loop
1227 prov = provider_new(p->name, p->init, NULL);
1230 prov->libctx = store->libctx;
1232 prov->error_lib = ERR_get_next_error_library();
1236 * We are calling provider_activate while holding the store lock. This
1237 * means the init function will be called while holding a lock. Normally
1238 * we try to avoid calling a user callback while holding a lock.
1239 * However, fallbacks are never third party providers so we accept this.
1241 if (provider_activate(prov, 0, 0) < 0) {
1242 ossl_provider_free(prov);
1245 prov->store = store;
1246 if (sk_OSSL_PROVIDER_push(store->providers, prov) == 0) {
1247 ossl_provider_free(prov);
1250 activated_fallback_count++;
1253 if (activated_fallback_count > 0) {
1254 store->use_fallbacks = 0;
1258 CRYPTO_THREAD_unlock(store->lock);
1262 int ossl_provider_doall_activated(OSSL_LIB_CTX *ctx,
1263 int (*cb)(OSSL_PROVIDER *provider,
1267 int ret = 0, curr, max, ref = 0;
1268 struct provider_store_st *store = get_provider_store(ctx);
1269 STACK_OF(OSSL_PROVIDER) *provs = NULL;
1273 * Make sure any providers are loaded from config before we try to use
1276 if (ossl_lib_ctx_is_default(ctx))
1277 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
1282 if (!provider_activate_fallbacks(store))
1286 * Under lock, grab a copy of the provider list and up_ref each
1287 * provider so that they don't disappear underneath us.
1289 if (!CRYPTO_THREAD_read_lock(store->lock))
1291 provs = sk_OSSL_PROVIDER_dup(store->providers);
1292 if (provs == NULL) {
1293 CRYPTO_THREAD_unlock(store->lock);
1296 max = sk_OSSL_PROVIDER_num(provs);
1298 * We work backwards through the stack so that we can safely delete items
1301 for (curr = max - 1; curr >= 0; curr--) {
1302 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1304 if (!CRYPTO_THREAD_write_lock(prov->flag_lock))
1306 if (prov->flag_activated) {
1308 * We call CRYPTO_UP_REF directly rather than ossl_provider_up_ref
1309 * to avoid upping the ref count on the parent provider, which we
1310 * must not do while holding locks.
1312 if (CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock) <= 0) {
1313 CRYPTO_THREAD_unlock(prov->flag_lock);
1317 * It's already activated, but we up the activated count to ensure
1318 * it remains activated until after we've called the user callback.
1319 * We do this with no locking (because we already hold the locks)
1320 * and no upcalls (which must not be called when locks are held). In
1321 * theory this could mean the parent provider goes inactive, whilst
1322 * still activated in the child for a short period. That's ok.
1324 if (provider_activate(prov, 0, 0) < 0) {
1325 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
1326 CRYPTO_THREAD_unlock(prov->flag_lock);
1330 sk_OSSL_PROVIDER_delete(provs, curr);
1333 CRYPTO_THREAD_unlock(prov->flag_lock);
1335 CRYPTO_THREAD_unlock(store->lock);
1338 * Now, we sweep through all providers not under lock
1340 for (curr = 0; curr < max; curr++) {
1341 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1343 if (!cb(prov, cbdata))
1352 CRYPTO_THREAD_unlock(store->lock);
1355 * The pop_free call doesn't do what we want on an error condition. We
1356 * either start from the first item in the stack, or part way through if
1357 * we only processed some of the items.
1359 for (curr++; curr < max; curr++) {
1360 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1362 provider_deactivate(prov, 0, 1);
1364 * As above where we did the up-ref, we don't call ossl_provider_free
1365 * to avoid making upcalls. There should always be at least one ref
1366 * to the provider in the store, so this should never drop to 0.
1368 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
1370 * Not much we can do if this assert ever fails. So we don't use
1375 sk_OSSL_PROVIDER_free(provs);
1379 int OSSL_PROVIDER_available(OSSL_LIB_CTX *libctx, const char *name)
1381 OSSL_PROVIDER *prov = NULL;
1383 struct provider_store_st *store = get_provider_store(libctx);
1385 if (store == NULL || !provider_activate_fallbacks(store))
1388 prov = ossl_provider_find(libctx, name, 0);
1390 if (!CRYPTO_THREAD_read_lock(prov->flag_lock))
1392 available = prov->flag_activated;
1393 CRYPTO_THREAD_unlock(prov->flag_lock);
1394 ossl_provider_free(prov);
1399 /* Getters of Provider Object data */
1400 const char *ossl_provider_name(const OSSL_PROVIDER *prov)
1405 const DSO *ossl_provider_dso(const OSSL_PROVIDER *prov)
1407 return prov->module;
1410 const char *ossl_provider_module_name(const OSSL_PROVIDER *prov)
1415 return DSO_get_filename(prov->module);
1419 const char *ossl_provider_module_path(const OSSL_PROVIDER *prov)
1424 /* FIXME: Ensure it's a full path */
1425 return DSO_get_filename(prov->module);
1429 void *ossl_provider_prov_ctx(const OSSL_PROVIDER *prov)
1432 return prov->provctx;
1437 const OSSL_DISPATCH *ossl_provider_get0_dispatch(const OSSL_PROVIDER *prov)
1440 return prov->dispatch;
1445 OSSL_LIB_CTX *ossl_provider_libctx(const OSSL_PROVIDER *prov)
1447 return prov != NULL ? prov->libctx : NULL;
1450 /* Wrappers around calls to the provider */
1451 void ossl_provider_teardown(const OSSL_PROVIDER *prov)
1453 if (prov->teardown != NULL
1458 prov->teardown(prov->provctx);
1461 const OSSL_PARAM *ossl_provider_gettable_params(const OSSL_PROVIDER *prov)
1463 return prov->gettable_params == NULL
1464 ? NULL : prov->gettable_params(prov->provctx);
1467 int ossl_provider_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
1469 return prov->get_params == NULL
1470 ? 0 : prov->get_params(prov->provctx, params);
1473 int ossl_provider_self_test(const OSSL_PROVIDER *prov)
1477 if (prov->self_test == NULL)
1479 ret = prov->self_test(prov->provctx);
1481 (void)provider_flush_store_cache(prov);
1485 int ossl_provider_get_capabilities(const OSSL_PROVIDER *prov,
1486 const char *capability,
1490 return prov->get_capabilities == NULL
1491 ? 1 : prov->get_capabilities(prov->provctx, capability, cb, arg);
1494 const OSSL_ALGORITHM *ossl_provider_query_operation(const OSSL_PROVIDER *prov,
1498 const OSSL_ALGORITHM *res;
1500 if (prov->query_operation == NULL)
1502 res = prov->query_operation(prov->provctx, operation_id, no_cache);
1503 #if defined(OPENSSL_NO_CACHED_FETCH)
1504 /* Forcing the non-caching of queries */
1505 if (no_cache != NULL)
1511 void ossl_provider_unquery_operation(const OSSL_PROVIDER *prov,
1513 const OSSL_ALGORITHM *algs)
1515 if (prov->unquery_operation != NULL)
1516 prov->unquery_operation(prov->provctx, operation_id, algs);
1519 int ossl_provider_clear_all_operation_bits(OSSL_LIB_CTX *libctx)
1521 struct provider_store_st *store;
1522 OSSL_PROVIDER *provider;
1523 int i, num, res = 1;
1525 if ((store = get_provider_store(libctx)) != NULL) {
1526 if (!CRYPTO_THREAD_read_lock(store->lock))
1528 num = sk_OSSL_PROVIDER_num(store->providers);
1529 for (i = 0; i < num; i++) {
1530 provider = sk_OSSL_PROVIDER_value(store->providers, i);
1531 if (!CRYPTO_THREAD_write_lock(provider->opbits_lock)) {
1535 if (provider->operation_bits != NULL)
1536 memset(provider->operation_bits, 0,
1537 provider->operation_bits_sz);
1538 CRYPTO_THREAD_unlock(provider->opbits_lock);
1540 CRYPTO_THREAD_unlock(store->lock);
1546 int ossl_provider_set_operation_bit(OSSL_PROVIDER *provider, size_t bitnum)
1548 size_t byte = bitnum / 8;
1549 unsigned char bit = (1 << (bitnum % 8)) & 0xFF;
1551 if (!CRYPTO_THREAD_write_lock(provider->opbits_lock))
1553 if (provider->operation_bits_sz <= byte) {
1554 unsigned char *tmp = OPENSSL_realloc(provider->operation_bits,
1558 CRYPTO_THREAD_unlock(provider->opbits_lock);
1559 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
1562 provider->operation_bits = tmp;
1563 memset(provider->operation_bits + provider->operation_bits_sz,
1564 '\0', byte + 1 - provider->operation_bits_sz);
1565 provider->operation_bits_sz = byte + 1;
1567 provider->operation_bits[byte] |= bit;
1568 CRYPTO_THREAD_unlock(provider->opbits_lock);
1572 int ossl_provider_test_operation_bit(OSSL_PROVIDER *provider, size_t bitnum,
1575 size_t byte = bitnum / 8;
1576 unsigned char bit = (1 << (bitnum % 8)) & 0xFF;
1578 if (!ossl_assert(result != NULL)) {
1579 ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
1584 if (!CRYPTO_THREAD_read_lock(provider->opbits_lock))
1586 if (provider->operation_bits_sz > byte)
1587 *result = ((provider->operation_bits[byte] & bit) != 0);
1588 CRYPTO_THREAD_unlock(provider->opbits_lock);
1593 const OSSL_CORE_HANDLE *ossl_provider_get_parent(OSSL_PROVIDER *prov)
1595 return prov->handle;
1598 int ossl_provider_is_child(const OSSL_PROVIDER *prov)
1600 return prov->ischild;
1603 int ossl_provider_set_child(OSSL_PROVIDER *prov, const OSSL_CORE_HANDLE *handle)
1605 prov->handle = handle;
1611 int ossl_provider_default_props_update(OSSL_LIB_CTX *libctx, const char *props)
1614 struct provider_store_st *store = NULL;
1616 OSSL_PROVIDER_CHILD_CB *child_cb;
1618 if ((store = get_provider_store(libctx)) == NULL)
1621 if (!CRYPTO_THREAD_read_lock(store->lock))
1624 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1625 for (i = 0; i < max; i++) {
1626 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1627 child_cb->global_props_cb(props, child_cb->cbdata);
1630 CRYPTO_THREAD_unlock(store->lock);
1635 static int ossl_provider_register_child_cb(const OSSL_CORE_HANDLE *handle,
1637 const OSSL_CORE_HANDLE *provider,
1640 const OSSL_CORE_HANDLE *provider,
1642 int (*global_props_cb)(
1648 * This is really an OSSL_PROVIDER that we created and cast to
1649 * OSSL_CORE_HANDLE originally. Therefore it is safe to cast it back.
1651 OSSL_PROVIDER *thisprov = (OSSL_PROVIDER *)handle;
1652 OSSL_PROVIDER *prov;
1653 OSSL_LIB_CTX *libctx = thisprov->libctx;
1654 struct provider_store_st *store = NULL;
1655 int ret = 0, i, max;
1656 OSSL_PROVIDER_CHILD_CB *child_cb;
1657 char *propsstr = NULL;
1659 if ((store = get_provider_store(libctx)) == NULL)
1662 child_cb = OPENSSL_malloc(sizeof(*child_cb));
1663 if (child_cb == NULL)
1665 child_cb->prov = thisprov;
1666 child_cb->create_cb = create_cb;
1667 child_cb->remove_cb = remove_cb;
1668 child_cb->global_props_cb = global_props_cb;
1669 child_cb->cbdata = cbdata;
1671 if (!CRYPTO_THREAD_write_lock(store->lock)) {
1672 OPENSSL_free(child_cb);
1675 propsstr = evp_get_global_properties_str(libctx, 0);
1677 if (propsstr != NULL) {
1678 global_props_cb(propsstr, cbdata);
1679 OPENSSL_free(propsstr);
1681 max = sk_OSSL_PROVIDER_num(store->providers);
1682 for (i = 0; i < max; i++) {
1685 prov = sk_OSSL_PROVIDER_value(store->providers, i);
1687 if (!CRYPTO_THREAD_read_lock(prov->flag_lock))
1689 activated = prov->flag_activated;
1690 CRYPTO_THREAD_unlock(prov->flag_lock);
1692 * We hold the store lock while calling the user callback. This means
1693 * that the user callback must be short and simple and not do anything
1694 * likely to cause a deadlock. We don't hold the flag_lock during this
1695 * call. In theory this means that another thread could deactivate it
1696 * while we are calling create. This is ok because the other thread
1697 * will also call remove_cb, but won't be able to do so until we release
1700 if (activated && !create_cb((OSSL_CORE_HANDLE *)prov, cbdata))
1705 ret = sk_OSSL_PROVIDER_CHILD_CB_push(store->child_cbs, child_cb);
1707 if (i != max || ret <= 0) {
1708 /* Failed during creation. Remove everything we just added */
1709 for (; i >= 0; i--) {
1710 prov = sk_OSSL_PROVIDER_value(store->providers, i);
1711 remove_cb((OSSL_CORE_HANDLE *)prov, cbdata);
1713 OPENSSL_free(child_cb);
1716 CRYPTO_THREAD_unlock(store->lock);
1721 static void ossl_provider_deregister_child_cb(const OSSL_CORE_HANDLE *handle)
1724 * This is really an OSSL_PROVIDER that we created and cast to
1725 * OSSL_CORE_HANDLE originally. Therefore it is safe to cast it back.
1727 OSSL_PROVIDER *thisprov = (OSSL_PROVIDER *)handle;
1728 OSSL_LIB_CTX *libctx = thisprov->libctx;
1729 struct provider_store_st *store = NULL;
1731 OSSL_PROVIDER_CHILD_CB *child_cb;
1733 if ((store = get_provider_store(libctx)) == NULL)
1736 if (!CRYPTO_THREAD_write_lock(store->lock))
1738 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1739 for (i = 0; i < max; i++) {
1740 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1741 if (child_cb->prov == thisprov) {
1742 /* Found an entry */
1743 sk_OSSL_PROVIDER_CHILD_CB_delete(store->child_cbs, i);
1744 OPENSSL_free(child_cb);
1748 CRYPTO_THREAD_unlock(store->lock);
1753 * Core functions for the provider
1754 * ===============================
1756 * This is the set of functions that the core makes available to the provider
1760 * This returns a list of Provider Object parameters with their types, for
1761 * discovery. We do not expect that many providers will use this, but one
1764 static const OSSL_PARAM param_types[] = {
1765 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_VERSION, OSSL_PARAM_UTF8_PTR, NULL, 0),
1766 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_PROV_NAME, OSSL_PARAM_UTF8_PTR,
1769 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_MODULE_FILENAME, OSSL_PARAM_UTF8_PTR,
1776 * Forward declare all the functions that are provided aa dispatch.
1777 * This ensures that the compiler will complain if they aren't defined
1778 * with the correct signature.
1780 static OSSL_FUNC_core_gettable_params_fn core_gettable_params;
1781 static OSSL_FUNC_core_get_params_fn core_get_params;
1782 static OSSL_FUNC_core_thread_start_fn core_thread_start;
1783 static OSSL_FUNC_core_get_libctx_fn core_get_libctx;
1785 static OSSL_FUNC_core_new_error_fn core_new_error;
1786 static OSSL_FUNC_core_set_error_debug_fn core_set_error_debug;
1787 static OSSL_FUNC_core_vset_error_fn core_vset_error;
1788 static OSSL_FUNC_core_set_error_mark_fn core_set_error_mark;
1789 static OSSL_FUNC_core_clear_last_error_mark_fn core_clear_last_error_mark;
1790 static OSSL_FUNC_core_pop_error_to_mark_fn core_pop_error_to_mark;
1791 static OSSL_FUNC_core_obj_add_sigid_fn core_obj_add_sigid;
1792 static OSSL_FUNC_core_obj_create_fn core_obj_create;
1795 static const OSSL_PARAM *core_gettable_params(const OSSL_CORE_HANDLE *handle)
1800 static int core_get_params(const OSSL_CORE_HANDLE *handle, OSSL_PARAM params[])
1805 * We created this object originally and we know it is actually an
1806 * OSSL_PROVIDER *, so the cast is safe
1808 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1810 if ((p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_CORE_VERSION)) != NULL)
1811 OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR);
1812 if ((p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_CORE_PROV_NAME)) != NULL)
1813 OSSL_PARAM_set_utf8_ptr(p, prov->name);
1816 if ((p = OSSL_PARAM_locate(params,
1817 OSSL_PROV_PARAM_CORE_MODULE_FILENAME)) != NULL)
1818 OSSL_PARAM_set_utf8_ptr(p, ossl_provider_module_path(prov));
1821 if (prov->parameters == NULL)
1824 for (i = 0; i < sk_INFOPAIR_num(prov->parameters); i++) {
1825 INFOPAIR *pair = sk_INFOPAIR_value(prov->parameters, i);
1827 if ((p = OSSL_PARAM_locate(params, pair->name)) != NULL)
1828 OSSL_PARAM_set_utf8_ptr(p, pair->value);
1833 static OPENSSL_CORE_CTX *core_get_libctx(const OSSL_CORE_HANDLE *handle)
1836 * We created this object originally and we know it is actually an
1837 * OSSL_PROVIDER *, so the cast is safe
1839 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1842 * Using ossl_provider_libctx would be wrong as that returns
1843 * NULL for |prov| == NULL and NULL libctx has a special meaning
1844 * that does not apply here. Here |prov| == NULL can happen only in
1845 * case of a coding error.
1847 assert(prov != NULL);
1848 return (OPENSSL_CORE_CTX *)prov->libctx;
1851 static int core_thread_start(const OSSL_CORE_HANDLE *handle,
1852 OSSL_thread_stop_handler_fn handfn,
1856 * We created this object originally and we know it is actually an
1857 * OSSL_PROVIDER *, so the cast is safe
1859 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1861 return ossl_init_thread_start(prov, arg, handfn);
1865 * The FIPS module inner provider doesn't implement these. They aren't
1866 * needed there, since the FIPS module upcalls are always the outer provider
1871 * These error functions should use |handle| to select the proper
1872 * library context to report in the correct error stack if error
1873 * stacks become tied to the library context.
1874 * We cannot currently do that since there's no support for it in the
1877 static void core_new_error(const OSSL_CORE_HANDLE *handle)
1882 static void core_set_error_debug(const OSSL_CORE_HANDLE *handle,
1883 const char *file, int line, const char *func)
1885 ERR_set_debug(file, line, func);
1888 static void core_vset_error(const OSSL_CORE_HANDLE *handle,
1889 uint32_t reason, const char *fmt, va_list args)
1892 * We created this object originally and we know it is actually an
1893 * OSSL_PROVIDER *, so the cast is safe
1895 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1898 * If the uppermost 8 bits are non-zero, it's an OpenSSL library
1899 * error and will be treated as such. Otherwise, it's a new style
1900 * provider error and will be treated as such.
1902 if (ERR_GET_LIB(reason) != 0) {
1903 ERR_vset_error(ERR_GET_LIB(reason), ERR_GET_REASON(reason), fmt, args);
1905 ERR_vset_error(prov->error_lib, (int)reason, fmt, args);
1909 static int core_set_error_mark(const OSSL_CORE_HANDLE *handle)
1911 return ERR_set_mark();
1914 static int core_clear_last_error_mark(const OSSL_CORE_HANDLE *handle)
1916 return ERR_clear_last_mark();
1919 static int core_pop_error_to_mark(const OSSL_CORE_HANDLE *handle)
1921 return ERR_pop_to_mark();
1924 static int core_obj_add_sigid(const OSSL_CORE_HANDLE *prov,
1925 const char *sign_name, const char *digest_name,
1926 const char *pkey_name)
1928 int sign_nid = OBJ_txt2nid(sign_name);
1929 int digest_nid = NID_undef;
1930 int pkey_nid = OBJ_txt2nid(pkey_name);
1932 if (digest_name != NULL && digest_name[0] != '\0'
1933 && (digest_nid = OBJ_txt2nid(digest_name)) == NID_undef)
1936 if (sign_nid == NID_undef)
1940 * Check if it already exists. This is a success if so (even if we don't
1941 * have nids for the digest/pkey)
1943 if (OBJ_find_sigid_algs(sign_nid, NULL, NULL))
1946 if (pkey_nid == NID_undef)
1949 return OBJ_add_sigid(sign_nid, digest_nid, pkey_nid);
1952 static int core_obj_create(const OSSL_CORE_HANDLE *prov, const char *oid,
1953 const char *sn, const char *ln)
1955 /* Check if it already exists and create it if not */
1956 return OBJ_txt2nid(oid) != NID_undef
1957 || OBJ_create(oid, sn, ln) != NID_undef;
1959 #endif /* FIPS_MODULE */
1962 * Functions provided by the core.
1964 static const OSSL_DISPATCH core_dispatch_[] = {
1965 { OSSL_FUNC_CORE_GETTABLE_PARAMS, (void (*)(void))core_gettable_params },
1966 { OSSL_FUNC_CORE_GET_PARAMS, (void (*)(void))core_get_params },
1967 { OSSL_FUNC_CORE_GET_LIBCTX, (void (*)(void))core_get_libctx },
1968 { OSSL_FUNC_CORE_THREAD_START, (void (*)(void))core_thread_start },
1970 { OSSL_FUNC_CORE_NEW_ERROR, (void (*)(void))core_new_error },
1971 { OSSL_FUNC_CORE_SET_ERROR_DEBUG, (void (*)(void))core_set_error_debug },
1972 { OSSL_FUNC_CORE_VSET_ERROR, (void (*)(void))core_vset_error },
1973 { OSSL_FUNC_CORE_SET_ERROR_MARK, (void (*)(void))core_set_error_mark },
1974 { OSSL_FUNC_CORE_CLEAR_LAST_ERROR_MARK,
1975 (void (*)(void))core_clear_last_error_mark },
1976 { OSSL_FUNC_CORE_POP_ERROR_TO_MARK, (void (*)(void))core_pop_error_to_mark },
1977 { OSSL_FUNC_BIO_NEW_FILE, (void (*)(void))ossl_core_bio_new_file },
1978 { OSSL_FUNC_BIO_NEW_MEMBUF, (void (*)(void))ossl_core_bio_new_mem_buf },
1979 { OSSL_FUNC_BIO_READ_EX, (void (*)(void))ossl_core_bio_read_ex },
1980 { OSSL_FUNC_BIO_WRITE_EX, (void (*)(void))ossl_core_bio_write_ex },
1981 { OSSL_FUNC_BIO_GETS, (void (*)(void))ossl_core_bio_gets },
1982 { OSSL_FUNC_BIO_PUTS, (void (*)(void))ossl_core_bio_puts },
1983 { OSSL_FUNC_BIO_CTRL, (void (*)(void))ossl_core_bio_ctrl },
1984 { OSSL_FUNC_BIO_UP_REF, (void (*)(void))ossl_core_bio_up_ref },
1985 { OSSL_FUNC_BIO_FREE, (void (*)(void))ossl_core_bio_free },
1986 { OSSL_FUNC_BIO_VPRINTF, (void (*)(void))ossl_core_bio_vprintf },
1987 { OSSL_FUNC_BIO_VSNPRINTF, (void (*)(void))BIO_vsnprintf },
1988 { OSSL_FUNC_SELF_TEST_CB, (void (*)(void))OSSL_SELF_TEST_get_callback },
1989 { OSSL_FUNC_GET_ENTROPY, (void (*)(void))ossl_rand_get_entropy },
1990 { OSSL_FUNC_CLEANUP_ENTROPY, (void (*)(void))ossl_rand_cleanup_entropy },
1991 { OSSL_FUNC_GET_NONCE, (void (*)(void))ossl_rand_get_nonce },
1992 { OSSL_FUNC_CLEANUP_NONCE, (void (*)(void))ossl_rand_cleanup_nonce },
1994 { OSSL_FUNC_CRYPTO_MALLOC, (void (*)(void))CRYPTO_malloc },
1995 { OSSL_FUNC_CRYPTO_ZALLOC, (void (*)(void))CRYPTO_zalloc },
1996 { OSSL_FUNC_CRYPTO_FREE, (void (*)(void))CRYPTO_free },
1997 { OSSL_FUNC_CRYPTO_CLEAR_FREE, (void (*)(void))CRYPTO_clear_free },
1998 { OSSL_FUNC_CRYPTO_REALLOC, (void (*)(void))CRYPTO_realloc },
1999 { OSSL_FUNC_CRYPTO_CLEAR_REALLOC, (void (*)(void))CRYPTO_clear_realloc },
2000 { OSSL_FUNC_CRYPTO_SECURE_MALLOC, (void (*)(void))CRYPTO_secure_malloc },
2001 { OSSL_FUNC_CRYPTO_SECURE_ZALLOC, (void (*)(void))CRYPTO_secure_zalloc },
2002 { OSSL_FUNC_CRYPTO_SECURE_FREE, (void (*)(void))CRYPTO_secure_free },
2003 { OSSL_FUNC_CRYPTO_SECURE_CLEAR_FREE,
2004 (void (*)(void))CRYPTO_secure_clear_free },
2005 { OSSL_FUNC_CRYPTO_SECURE_ALLOCATED,
2006 (void (*)(void))CRYPTO_secure_allocated },
2007 { OSSL_FUNC_OPENSSL_CLEANSE, (void (*)(void))OPENSSL_cleanse },
2009 { OSSL_FUNC_PROVIDER_REGISTER_CHILD_CB,
2010 (void (*)(void))ossl_provider_register_child_cb },
2011 { OSSL_FUNC_PROVIDER_DEREGISTER_CHILD_CB,
2012 (void (*)(void))ossl_provider_deregister_child_cb },
2013 { OSSL_FUNC_PROVIDER_NAME,
2014 (void (*)(void))OSSL_PROVIDER_get0_name },
2015 { OSSL_FUNC_PROVIDER_GET0_PROVIDER_CTX,
2016 (void (*)(void))OSSL_PROVIDER_get0_provider_ctx },
2017 { OSSL_FUNC_PROVIDER_GET0_DISPATCH,
2018 (void (*)(void))OSSL_PROVIDER_get0_dispatch },
2019 { OSSL_FUNC_PROVIDER_UP_REF,
2020 (void (*)(void))provider_up_ref_intern },
2021 { OSSL_FUNC_PROVIDER_FREE,
2022 (void (*)(void))provider_free_intern },
2023 { OSSL_FUNC_CORE_OBJ_ADD_SIGID, (void (*)(void))core_obj_add_sigid },
2024 { OSSL_FUNC_CORE_OBJ_CREATE, (void (*)(void))core_obj_create },
2028 static const OSSL_DISPATCH *core_dispatch = core_dispatch_;