2 * Copyright 2019-2022 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"
19 #include "crypto/decoder.h" /* ossl_decoder_store_cache_flush */
20 #include "crypto/encoder.h" /* ossl_encoder_store_cache_flush */
21 #include "crypto/store.h" /* ossl_store_loader_store_cache_flush */
23 #include "crypto/evp.h" /* evp_method_store_cache_flush */
24 #include "crypto/rand.h"
25 #include "internal/nelem.h"
26 #include "internal/thread_once.h"
27 #include "internal/provider.h"
28 #include "internal/refcount.h"
29 #include "internal/bio.h"
30 #include "internal/core.h"
31 #include "provider_local.h"
32 #include "crypto/context.h"
34 # include <openssl/self_test.h>
38 * This file defines and uses a number of different structures:
40 * OSSL_PROVIDER (provider_st): Used to represent all information related to a
41 * single instance of a provider.
43 * provider_store_st: Holds information about the collection of providers that
44 * are available within the current library context (OSSL_LIB_CTX). It also
45 * holds configuration information about providers that could be loaded at some
48 * OSSL_PROVIDER_CHILD_CB: An instance of this structure holds the callbacks
49 * that have been registered for a child library context and the associated
50 * provider that registered those callbacks.
52 * Where a child library context exists then it has its own instance of the
53 * provider store. Each provider that exists in the parent provider store, has
54 * an associated child provider in the child library context's provider store.
55 * As providers get activated or deactivated this needs to be mirrored in the
56 * associated child providers.
61 * There are a number of different locks used in this file and it is important
62 * to understand how they should be used in order to avoid deadlocks.
64 * Fields within a structure can often be "write once" on creation, and then
65 * "read many". Creation of a structure is done by a single thread, and
66 * therefore no lock is required for the "write once/read many" fields. It is
67 * safe for multiple threads to read these fields without a lock, because they
68 * will never be changed.
70 * However some fields may be changed after a structure has been created and
71 * shared between multiple threads. Where this is the case a lock is required.
73 * The locks available are:
75 * The provider flag_lock: Used to control updates to the various provider
76 * "flags" (flag_initialized and flag_activated) and associated
77 * "counts" (activatecnt).
79 * The provider refcnt_lock: Only ever used to control updates to the provider
82 * The provider optbits_lock: Used to control access to the provider's
83 * operation_bits and operation_bits_sz fields.
85 * The store default_path_lock: Used to control access to the provider store's
86 * default search path value (default_path)
88 * The store lock: Used to control the stack of provider's held within the
89 * provider store, as well as the stack of registered child provider callbacks.
91 * As a general rule-of-thumb it is best to:
92 * - keep the scope of the code that is protected by a lock to the absolute
94 * - try to keep the scope of the lock to within a single function (i.e. avoid
95 * making calls to other functions while holding a lock);
96 * - try to only ever hold one lock at a time.
98 * Unfortunately, it is not always possible to stick to the above guidelines.
99 * Where they are not adhered to there is always a danger of inadvertently
100 * introducing the possibility of deadlock. The following rules MUST be adhered
101 * to in order to avoid that:
102 * - Holding multiple locks at the same time is only allowed for the
103 * provider store lock, the provider flag_lock and the provider refcnt_lock.
104 * - When holding multiple locks they must be acquired in the following order of
106 * 1) provider store lock
107 * 2) provider flag_lock
108 * 3) provider refcnt_lock
109 * - When releasing locks they must be released in the reverse order to which
111 * - No locks may be held when making an upcall. NOTE: Some common functions
112 * can make upcalls as part of their normal operation. If you need to call
113 * some other function while holding a lock make sure you know whether it
114 * will make any upcalls or not. For example ossl_provider_up_ref() can call
115 * ossl_provider_up_ref_parent() which can call the c_prov_up_ref() upcall.
116 * - It is permissible to hold the store and flag locks when calling child
117 * provider callbacks. No other locks may be held during such callbacks.
120 static OSSL_PROVIDER *provider_new(const char *name,
121 OSSL_provider_init_fn *init_function,
122 STACK_OF(INFOPAIR) *parameters);
125 * Provider Object structure
126 * =========================
132 int (*create_cb)(const OSSL_CORE_HANDLE *provider, void *cbdata);
133 int (*remove_cb)(const OSSL_CORE_HANDLE *provider, void *cbdata);
134 int (*global_props_cb)(const char *props, void *cbdata);
136 } OSSL_PROVIDER_CHILD_CB;
137 DEFINE_STACK_OF(OSSL_PROVIDER_CHILD_CB)
140 struct provider_store_st; /* Forward declaration */
142 struct ossl_provider_st {
144 unsigned int flag_initialized:1;
145 unsigned int flag_activated:1;
147 /* Getting and setting the flags require synchronization */
148 CRYPTO_RWLOCK *flag_lock;
150 /* OpenSSL library side data */
151 CRYPTO_REF_COUNT refcnt;
152 CRYPTO_RWLOCK *refcnt_lock; /* For the ref counter */
157 OSSL_provider_init_fn *init_function;
158 STACK_OF(INFOPAIR) *parameters;
159 OSSL_LIB_CTX *libctx; /* The library context this instance is in */
160 struct provider_store_st *store; /* The store this instance belongs to */
163 * In the FIPS module inner provider, this isn't needed, since the
164 * error upcalls are always direct calls to the outer provider.
166 int error_lib; /* ERR library number, one for each provider */
167 # ifndef OPENSSL_NO_ERR
168 ERR_STRING_DATA *error_strings; /* Copy of what the provider gives us */
172 /* Provider side functions */
173 OSSL_FUNC_provider_teardown_fn *teardown;
174 OSSL_FUNC_provider_gettable_params_fn *gettable_params;
175 OSSL_FUNC_provider_get_params_fn *get_params;
176 OSSL_FUNC_provider_get_capabilities_fn *get_capabilities;
177 OSSL_FUNC_provider_self_test_fn *self_test;
178 OSSL_FUNC_provider_query_operation_fn *query_operation;
179 OSSL_FUNC_provider_unquery_operation_fn *unquery_operation;
182 * Cache of bit to indicate of query_operation() has been called on
183 * a specific operation or not.
185 unsigned char *operation_bits;
186 size_t operation_bits_sz;
187 CRYPTO_RWLOCK *opbits_lock;
190 /* Whether this provider is the child of some other provider */
191 const OSSL_CORE_HANDLE *handle;
192 unsigned int ischild:1;
195 /* Provider side data */
197 const OSSL_DISPATCH *dispatch;
199 DEFINE_STACK_OF(OSSL_PROVIDER)
201 static int ossl_provider_cmp(const OSSL_PROVIDER * const *a,
202 const OSSL_PROVIDER * const *b)
204 return strcmp((*a)->name, (*b)->name);
208 * Provider Object store
209 * =====================
211 * The Provider Object store is a library context object, and therefore needs
215 struct provider_store_st {
216 OSSL_LIB_CTX *libctx;
217 STACK_OF(OSSL_PROVIDER) *providers;
218 STACK_OF(OSSL_PROVIDER_CHILD_CB) *child_cbs;
219 CRYPTO_RWLOCK *default_path_lock;
222 OSSL_PROVIDER_INFO *provinfo;
225 unsigned int use_fallbacks:1;
226 unsigned int freeing:1;
230 * provider_deactivate_free() is a wrapper around ossl_provider_deactivate()
231 * and ossl_provider_free(), called as needed.
232 * Since this is only called when the provider store is being emptied, we
233 * don't need to care about any lock.
235 static void provider_deactivate_free(OSSL_PROVIDER *prov)
237 if (prov->flag_activated)
238 ossl_provider_deactivate(prov, 1);
239 ossl_provider_free(prov);
243 static void ossl_provider_child_cb_free(OSSL_PROVIDER_CHILD_CB *cb)
249 static void infopair_free(INFOPAIR *pair)
251 OPENSSL_free(pair->name);
252 OPENSSL_free(pair->value);
256 static INFOPAIR *infopair_copy(const INFOPAIR *src)
258 INFOPAIR *dest = OPENSSL_zalloc(sizeof(*dest));
262 if (src->name != NULL) {
263 dest->name = OPENSSL_strdup(src->name);
264 if (dest->name == NULL)
267 if (src->value != NULL) {
268 dest->value = OPENSSL_strdup(src->value);
269 if (dest->value == NULL)
274 OPENSSL_free(dest->name);
279 void ossl_provider_info_clear(OSSL_PROVIDER_INFO *info)
281 OPENSSL_free(info->name);
282 OPENSSL_free(info->path);
283 sk_INFOPAIR_pop_free(info->parameters, infopair_free);
286 void ossl_provider_store_free(void *vstore)
288 struct provider_store_st *store = vstore;
294 OPENSSL_free(store->default_path);
295 sk_OSSL_PROVIDER_pop_free(store->providers, provider_deactivate_free);
297 sk_OSSL_PROVIDER_CHILD_CB_pop_free(store->child_cbs,
298 ossl_provider_child_cb_free);
300 CRYPTO_THREAD_lock_free(store->default_path_lock);
301 CRYPTO_THREAD_lock_free(store->lock);
302 for (i = 0; i < store->numprovinfo; i++)
303 ossl_provider_info_clear(&store->provinfo[i]);
304 OPENSSL_free(store->provinfo);
308 void *ossl_provider_store_new(OSSL_LIB_CTX *ctx)
310 struct provider_store_st *store = OPENSSL_zalloc(sizeof(*store));
313 || (store->providers = sk_OSSL_PROVIDER_new(ossl_provider_cmp)) == NULL
314 || (store->default_path_lock = CRYPTO_THREAD_lock_new()) == NULL
316 || (store->child_cbs = sk_OSSL_PROVIDER_CHILD_CB_new_null()) == NULL
318 || (store->lock = CRYPTO_THREAD_lock_new()) == NULL) {
319 ossl_provider_store_free(store);
323 store->use_fallbacks = 1;
328 static struct provider_store_st *get_provider_store(OSSL_LIB_CTX *libctx)
330 struct provider_store_st *store = NULL;
332 store = ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_PROVIDER_STORE_INDEX);
334 ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
338 int ossl_provider_disable_fallback_loading(OSSL_LIB_CTX *libctx)
340 struct provider_store_st *store;
342 if ((store = get_provider_store(libctx)) != NULL) {
343 if (!CRYPTO_THREAD_write_lock(store->lock))
345 store->use_fallbacks = 0;
346 CRYPTO_THREAD_unlock(store->lock);
352 #define BUILTINS_BLOCK_SIZE 10
354 int ossl_provider_info_add_to_store(OSSL_LIB_CTX *libctx,
355 OSSL_PROVIDER_INFO *entry)
357 struct provider_store_st *store = get_provider_store(libctx);
360 if (entry->name == NULL) {
361 ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
366 ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
370 if (!CRYPTO_THREAD_write_lock(store->lock))
372 if (store->provinfosz == 0) {
373 store->provinfo = OPENSSL_zalloc(sizeof(*store->provinfo)
374 * BUILTINS_BLOCK_SIZE);
375 if (store->provinfo == NULL) {
376 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
379 store->provinfosz = BUILTINS_BLOCK_SIZE;
380 } else if (store->numprovinfo == store->provinfosz) {
381 OSSL_PROVIDER_INFO *tmpbuiltins;
382 size_t newsz = store->provinfosz + BUILTINS_BLOCK_SIZE;
384 tmpbuiltins = OPENSSL_realloc(store->provinfo,
385 sizeof(*store->provinfo) * newsz);
386 if (tmpbuiltins == NULL) {
387 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
390 store->provinfo = tmpbuiltins;
391 store->provinfosz = newsz;
393 store->provinfo[store->numprovinfo] = *entry;
394 store->numprovinfo++;
398 CRYPTO_THREAD_unlock(store->lock);
402 OSSL_PROVIDER *ossl_provider_find(OSSL_LIB_CTX *libctx, const char *name,
405 struct provider_store_st *store = NULL;
406 OSSL_PROVIDER *prov = NULL;
408 if ((store = get_provider_store(libctx)) != NULL) {
409 OSSL_PROVIDER tmpl = { 0, };
414 * Make sure any providers are loaded from config before we try to find
418 if (ossl_lib_ctx_is_default(libctx))
419 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
423 tmpl.name = (char *)name;
425 * A "find" operation can sort the stack, and therefore a write lock is
428 if (!CRYPTO_THREAD_write_lock(store->lock))
430 if ((i = sk_OSSL_PROVIDER_find(store->providers, &tmpl)) != -1)
431 prov = sk_OSSL_PROVIDER_value(store->providers, i);
432 CRYPTO_THREAD_unlock(store->lock);
433 if (prov != NULL && !ossl_provider_up_ref(prov))
441 * Provider Object methods
442 * =======================
445 static OSSL_PROVIDER *provider_new(const char *name,
446 OSSL_provider_init_fn *init_function,
447 STACK_OF(INFOPAIR) *parameters)
449 OSSL_PROVIDER *prov = NULL;
451 if ((prov = OPENSSL_zalloc(sizeof(*prov))) == NULL
453 || (prov->refcnt_lock = CRYPTO_THREAD_lock_new()) == NULL
457 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
461 prov->refcnt = 1; /* 1 One reference to be returned */
463 if ((prov->opbits_lock = CRYPTO_THREAD_lock_new()) == NULL
464 || (prov->flag_lock = CRYPTO_THREAD_lock_new()) == NULL
465 || (prov->name = OPENSSL_strdup(name)) == NULL
466 || (prov->parameters = sk_INFOPAIR_deep_copy(parameters,
468 infopair_free)) == NULL) {
469 ossl_provider_free(prov);
470 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
474 prov->init_function = init_function;
479 int ossl_provider_up_ref(OSSL_PROVIDER *prov)
483 if (CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock) <= 0)
488 if (!ossl_provider_up_ref_parent(prov, 0)) {
489 ossl_provider_free(prov);
499 static int provider_up_ref_intern(OSSL_PROVIDER *prov, int activate)
502 return ossl_provider_activate(prov, 1, 0);
504 return ossl_provider_up_ref(prov);
507 static int provider_free_intern(OSSL_PROVIDER *prov, int deactivate)
510 return ossl_provider_deactivate(prov, 1);
512 ossl_provider_free(prov);
518 * We assume that the requested provider does not already exist in the store.
519 * The caller should check. If it does exist then adding it to the store later
522 OSSL_PROVIDER *ossl_provider_new(OSSL_LIB_CTX *libctx, const char *name,
523 OSSL_provider_init_fn *init_function,
526 struct provider_store_st *store = NULL;
527 OSSL_PROVIDER_INFO template;
528 OSSL_PROVIDER *prov = NULL;
530 if ((store = get_provider_store(libctx)) == NULL)
533 memset(&template, 0, sizeof(template));
534 if (init_function == NULL) {
535 const OSSL_PROVIDER_INFO *p;
538 /* Check if this is a predefined builtin provider */
539 for (p = ossl_predefined_providers; p->name != NULL; p++) {
540 if (strcmp(p->name, name) == 0) {
545 if (p->name == NULL) {
546 /* Check if this is a user added builtin provider */
547 if (!CRYPTO_THREAD_read_lock(store->lock))
549 for (i = 0, p = store->provinfo; i < store->numprovinfo; p++, i++) {
550 if (strcmp(p->name, name) == 0) {
555 CRYPTO_THREAD_unlock(store->lock);
558 template.init = init_function;
561 /* provider_new() generates an error, so no need here */
562 if ((prov = provider_new(name, template.init, template.parameters)) == NULL)
565 prov->libctx = libctx;
567 prov->error_lib = ERR_get_next_error_library();
571 * At this point, the provider is only partially "loaded". To be
572 * fully "loaded", ossl_provider_activate() must also be called and it must
573 * then be added to the provider store.
579 /* Assumes that the store lock is held */
580 static int create_provider_children(OSSL_PROVIDER *prov)
584 struct provider_store_st *store = prov->store;
585 OSSL_PROVIDER_CHILD_CB *child_cb;
588 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
589 for (i = 0; i < max; i++) {
591 * This is newly activated (activatecnt == 1), so we need to
592 * create child providers as necessary.
594 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
595 ret &= child_cb->create_cb((OSSL_CORE_HANDLE *)prov, child_cb->cbdata);
602 int ossl_provider_add_to_store(OSSL_PROVIDER *prov, OSSL_PROVIDER **actualprov,
603 int retain_fallbacks)
605 struct provider_store_st *store;
607 OSSL_PROVIDER tmpl = { 0, };
608 OSSL_PROVIDER *actualtmp = NULL;
610 if (actualprov != NULL)
613 if ((store = get_provider_store(prov->libctx)) == NULL)
616 if (!CRYPTO_THREAD_write_lock(store->lock))
619 tmpl.name = (char *)prov->name;
620 idx = sk_OSSL_PROVIDER_find(store->providers, &tmpl);
624 actualtmp = sk_OSSL_PROVIDER_value(store->providers, idx);
627 if (sk_OSSL_PROVIDER_push(store->providers, prov) == 0)
630 if (!create_provider_children(prov)) {
631 sk_OSSL_PROVIDER_delete_ptr(store->providers, prov);
634 if (!retain_fallbacks)
635 store->use_fallbacks = 0;
638 CRYPTO_THREAD_unlock(store->lock);
640 if (actualprov != NULL) {
641 if (!ossl_provider_up_ref(actualtmp)) {
642 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
646 *actualprov = actualtmp;
651 * The provider is already in the store. Probably two threads
652 * independently initialised their own provider objects with the same
653 * name and raced to put them in the store. This thread lost. We
654 * deactivate the one we just created and use the one that already
656 * If we get here then we know we did not create provider children
657 * above, so we inform ossl_provider_deactivate not to attempt to remove
660 ossl_provider_deactivate(prov, 0);
661 ossl_provider_free(prov);
667 CRYPTO_THREAD_unlock(store->lock);
671 void ossl_provider_free(OSSL_PROVIDER *prov)
676 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
679 * When the refcount drops to zero, we clean up the provider.
680 * Note that this also does teardown, which may seem late,
681 * considering that init happens on first activation. However,
682 * there may be other structures hanging on to the provider after
683 * the last deactivation and may therefore need full access to the
684 * provider's services. Therefore, we deinit late.
687 if (prov->flag_initialized) {
688 ossl_provider_teardown(prov);
689 #ifndef OPENSSL_NO_ERR
691 if (prov->error_strings != NULL) {
692 ERR_unload_strings(prov->error_lib, prov->error_strings);
693 OPENSSL_free(prov->error_strings);
694 prov->error_strings = NULL;
698 OPENSSL_free(prov->operation_bits);
699 prov->operation_bits = NULL;
700 prov->operation_bits_sz = 0;
701 prov->flag_initialized = 0;
706 * We deregister thread handling whether or not the provider was
707 * initialized. If init was attempted but was not successful then
708 * the provider may still have registered a thread handler.
710 ossl_init_thread_deregister(prov);
711 DSO_free(prov->module);
713 OPENSSL_free(prov->name);
714 OPENSSL_free(prov->path);
715 sk_INFOPAIR_pop_free(prov->parameters, infopair_free);
716 CRYPTO_THREAD_lock_free(prov->opbits_lock);
717 CRYPTO_THREAD_lock_free(prov->flag_lock);
719 CRYPTO_THREAD_lock_free(prov->refcnt_lock);
724 else if (prov->ischild) {
725 ossl_provider_free_parent(prov, 0);
732 int ossl_provider_set_module_path(OSSL_PROVIDER *prov, const char *module_path)
734 OPENSSL_free(prov->path);
736 if (module_path == NULL)
738 if ((prov->path = OPENSSL_strdup(module_path)) != NULL)
740 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
744 static int infopair_add(STACK_OF(INFOPAIR) **infopairsk, const char *name,
747 INFOPAIR *pair = NULL;
749 if ((pair = OPENSSL_zalloc(sizeof(*pair))) != NULL
750 && (*infopairsk != NULL
751 || (*infopairsk = sk_INFOPAIR_new_null()) != NULL)
752 && (pair->name = OPENSSL_strdup(name)) != NULL
753 && (pair->value = OPENSSL_strdup(value)) != NULL
754 && sk_INFOPAIR_push(*infopairsk, pair) > 0)
758 OPENSSL_free(pair->name);
759 OPENSSL_free(pair->value);
762 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
766 int ossl_provider_add_parameter(OSSL_PROVIDER *prov,
767 const char *name, const char *value)
769 return infopair_add(&prov->parameters, name, value);
772 int ossl_provider_info_add_parameter(OSSL_PROVIDER_INFO *provinfo,
776 return infopair_add(&provinfo->parameters, name, value);
780 * Provider activation.
782 * What "activation" means depends on the provider form; for built in
783 * providers (in the library or the application alike), the provider
784 * can already be considered to be loaded, all that's needed is to
785 * initialize it. However, for dynamically loadable provider modules,
786 * we must first load that module.
788 * Built in modules are distinguished from dynamically loaded modules
789 * with an already assigned init function.
791 static const OSSL_DISPATCH *core_dispatch; /* Define further down */
793 int OSSL_PROVIDER_set_default_search_path(OSSL_LIB_CTX *libctx,
796 struct provider_store_st *store;
800 p = OPENSSL_strdup(path);
802 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
806 if ((store = get_provider_store(libctx)) != NULL
807 && CRYPTO_THREAD_write_lock(store->default_path_lock)) {
808 OPENSSL_free(store->default_path);
809 store->default_path = p;
810 CRYPTO_THREAD_unlock(store->default_path_lock);
818 * Internal version that doesn't affect the store flags, and thereby avoid
819 * locking. Direct callers must remember to set the store flags when
822 static int provider_init(OSSL_PROVIDER *prov)
824 const OSSL_DISPATCH *provider_dispatch = NULL;
825 void *tmp_provctx = NULL; /* safety measure */
826 #ifndef OPENSSL_NO_ERR
828 OSSL_FUNC_provider_get_reason_strings_fn *p_get_reason_strings = NULL;
833 if (!ossl_assert(!prov->flag_initialized)) {
834 ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
839 * If the init function isn't set, it indicates that this provider is
842 if (prov->init_function == NULL) {
846 if (prov->module == NULL) {
847 char *allocated_path = NULL;
848 const char *module_path = NULL;
849 char *merged_path = NULL;
850 const char *load_dir = NULL;
851 char *allocated_load_dir = NULL;
852 struct provider_store_st *store;
854 if ((prov->module = DSO_new()) == NULL) {
855 /* DSO_new() generates an error already */
859 if ((store = get_provider_store(prov->libctx)) == NULL
860 || !CRYPTO_THREAD_read_lock(store->default_path_lock))
863 if (store->default_path != NULL) {
864 allocated_load_dir = OPENSSL_strdup(store->default_path);
865 CRYPTO_THREAD_unlock(store->default_path_lock);
866 if (allocated_load_dir == NULL) {
867 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
870 load_dir = allocated_load_dir;
872 CRYPTO_THREAD_unlock(store->default_path_lock);
875 if (load_dir == NULL) {
876 load_dir = ossl_safe_getenv("OPENSSL_MODULES");
877 if (load_dir == NULL)
878 load_dir = MODULESDIR;
881 DSO_ctrl(prov->module, DSO_CTRL_SET_FLAGS,
882 DSO_FLAG_NAME_TRANSLATION_EXT_ONLY, NULL);
884 module_path = prov->path;
885 if (module_path == NULL)
886 module_path = allocated_path =
887 DSO_convert_filename(prov->module, prov->name);
888 if (module_path != NULL)
889 merged_path = DSO_merge(prov->module, module_path, load_dir);
891 if (merged_path == NULL
892 || (DSO_load(prov->module, merged_path, NULL, 0)) == NULL) {
893 DSO_free(prov->module);
897 OPENSSL_free(merged_path);
898 OPENSSL_free(allocated_path);
899 OPENSSL_free(allocated_load_dir);
902 if (prov->module != NULL)
903 prov->init_function = (OSSL_provider_init_fn *)
904 DSO_bind_func(prov->module, "OSSL_provider_init");
908 /* Call the initialise function for the provider. */
909 if (prov->init_function == NULL
910 || !prov->init_function((OSSL_CORE_HANDLE *)prov, core_dispatch,
911 &provider_dispatch, &tmp_provctx)) {
912 ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_INIT_FAIL,
913 "name=%s", prov->name);
916 prov->provctx = tmp_provctx;
917 prov->dispatch = provider_dispatch;
919 for (; provider_dispatch->function_id != 0; provider_dispatch++) {
920 switch (provider_dispatch->function_id) {
921 case OSSL_FUNC_PROVIDER_TEARDOWN:
923 OSSL_FUNC_provider_teardown(provider_dispatch);
925 case OSSL_FUNC_PROVIDER_GETTABLE_PARAMS:
926 prov->gettable_params =
927 OSSL_FUNC_provider_gettable_params(provider_dispatch);
929 case OSSL_FUNC_PROVIDER_GET_PARAMS:
931 OSSL_FUNC_provider_get_params(provider_dispatch);
933 case OSSL_FUNC_PROVIDER_SELF_TEST:
935 OSSL_FUNC_provider_self_test(provider_dispatch);
937 case OSSL_FUNC_PROVIDER_GET_CAPABILITIES:
938 prov->get_capabilities =
939 OSSL_FUNC_provider_get_capabilities(provider_dispatch);
941 case OSSL_FUNC_PROVIDER_QUERY_OPERATION:
942 prov->query_operation =
943 OSSL_FUNC_provider_query_operation(provider_dispatch);
945 case OSSL_FUNC_PROVIDER_UNQUERY_OPERATION:
946 prov->unquery_operation =
947 OSSL_FUNC_provider_unquery_operation(provider_dispatch);
949 #ifndef OPENSSL_NO_ERR
951 case OSSL_FUNC_PROVIDER_GET_REASON_STRINGS:
952 p_get_reason_strings =
953 OSSL_FUNC_provider_get_reason_strings(provider_dispatch);
960 #ifndef OPENSSL_NO_ERR
962 if (p_get_reason_strings != NULL) {
963 const OSSL_ITEM *reasonstrings = p_get_reason_strings(prov->provctx);
967 * ERR_load_strings() handles ERR_STRING_DATA rather than OSSL_ITEM,
968 * although they are essentially the same type.
969 * Furthermore, ERR_load_strings() patches the array's error number
970 * with the error library number, so we need to make a copy of that
974 while (reasonstrings[cnt].id != 0) {
975 if (ERR_GET_LIB(reasonstrings[cnt].id) != 0)
979 cnt++; /* One for the terminating item */
981 /* Allocate one extra item for the "library" name */
982 prov->error_strings =
983 OPENSSL_zalloc(sizeof(ERR_STRING_DATA) * (cnt + 1));
984 if (prov->error_strings == NULL)
988 * Set the "library" name.
990 prov->error_strings[0].error = ERR_PACK(prov->error_lib, 0, 0);
991 prov->error_strings[0].string = prov->name;
993 * Copy reasonstrings item 0..cnt-1 to prov->error_trings positions
996 for (cnt2 = 1; cnt2 <= cnt; cnt2++) {
997 prov->error_strings[cnt2].error = (int)reasonstrings[cnt2-1].id;
998 prov->error_strings[cnt2].string = reasonstrings[cnt2-1].ptr;
1001 ERR_load_strings(prov->error_lib, prov->error_strings);
1006 /* With this flag set, this provider has become fully "loaded". */
1007 prov->flag_initialized = 1;
1015 * Deactivate a provider. If upcalls is 0 then we suppress any upcalls to a
1016 * parent provider. If removechildren is 0 then we suppress any calls to remove
1018 * Return -1 on failure and the activation count on success
1020 static int provider_deactivate(OSSL_PROVIDER *prov, int upcalls,
1024 struct provider_store_st *store;
1030 if (!ossl_assert(prov != NULL))
1034 * No need to lock if we've got no store because we've not been shared with
1037 store = get_provider_store(prov->libctx);
1041 if (lock && !CRYPTO_THREAD_read_lock(store->lock))
1043 if (lock && !CRYPTO_THREAD_write_lock(prov->flag_lock)) {
1044 CRYPTO_THREAD_unlock(store->lock);
1049 if (prov->activatecnt >= 2 && prov->ischild && upcalls) {
1051 * We have had a direct activation in this child libctx so we need to
1052 * now down the ref count in the parent provider. We do the actual down
1053 * ref outside of the flag_lock, since it could involve getting other
1060 if ((count = --prov->activatecnt) < 1)
1061 prov->flag_activated = 0;
1068 if (removechildren && store != NULL) {
1069 int i, max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1070 OSSL_PROVIDER_CHILD_CB *child_cb;
1072 for (i = 0; i < max; i++) {
1073 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1074 child_cb->remove_cb((OSSL_CORE_HANDLE *)prov, child_cb->cbdata);
1079 CRYPTO_THREAD_unlock(prov->flag_lock);
1080 CRYPTO_THREAD_unlock(store->lock);
1084 ossl_provider_free_parent(prov, 1);
1087 /* We don't deinit here, that's done in ossl_provider_free() */
1092 * Activate a provider.
1093 * Return -1 on failure and the activation count on success
1095 static int provider_activate(OSSL_PROVIDER *prov, int lock, int upcalls)
1098 struct provider_store_st *store;
1101 store = prov->store;
1103 * If the provider hasn't been added to the store, then we don't need
1104 * any locks because we've not shared it with other threads.
1106 if (store == NULL) {
1108 if (!provider_init(prov))
1113 if (prov->ischild && upcalls && !ossl_provider_up_ref_parent(prov, 1))
1117 if (lock && !CRYPTO_THREAD_read_lock(store->lock)) {
1119 if (prov->ischild && upcalls)
1120 ossl_provider_free_parent(prov, 1);
1125 if (lock && !CRYPTO_THREAD_write_lock(prov->flag_lock)) {
1126 CRYPTO_THREAD_unlock(store->lock);
1128 if (prov->ischild && upcalls)
1129 ossl_provider_free_parent(prov, 1);
1134 count = ++prov->activatecnt;
1135 prov->flag_activated = 1;
1137 if (prov->activatecnt == 1 && store != NULL) {
1138 ret = create_provider_children(prov);
1141 CRYPTO_THREAD_unlock(prov->flag_lock);
1142 CRYPTO_THREAD_unlock(store->lock);
1151 static int provider_flush_store_cache(const OSSL_PROVIDER *prov)
1153 struct provider_store_st *store;
1156 if ((store = get_provider_store(prov->libctx)) == NULL)
1159 if (!CRYPTO_THREAD_read_lock(store->lock))
1161 freeing = store->freeing;
1162 CRYPTO_THREAD_unlock(store->lock);
1166 = evp_method_store_cache_flush(prov->libctx)
1168 + ossl_encoder_store_cache_flush(prov->libctx)
1169 + ossl_decoder_store_cache_flush(prov->libctx)
1170 + ossl_store_loader_store_cache_flush(prov->libctx)
1183 static int provider_remove_store_methods(OSSL_PROVIDER *prov)
1185 struct provider_store_st *store;
1188 if ((store = get_provider_store(prov->libctx)) == NULL)
1191 if (!CRYPTO_THREAD_read_lock(store->lock))
1193 freeing = store->freeing;
1194 CRYPTO_THREAD_unlock(store->lock);
1199 if (!CRYPTO_THREAD_read_lock(prov->opbits_lock))
1201 OPENSSL_free(prov->operation_bits);
1202 prov->operation_bits = NULL;
1203 prov->operation_bits_sz = 0;
1204 CRYPTO_THREAD_unlock(prov->opbits_lock);
1206 acc = evp_method_store_remove_all_provided(prov)
1208 + ossl_encoder_store_remove_all_provided(prov)
1209 + ossl_decoder_store_remove_all_provided(prov)
1210 + ossl_store_loader_store_remove_all_provided(prov)
1223 int ossl_provider_activate(OSSL_PROVIDER *prov, int upcalls, int aschild)
1231 * If aschild is true, then we only actually do the activation if the
1232 * provider is a child. If its not, this is still success.
1234 if (aschild && !prov->ischild)
1237 if ((count = provider_activate(prov, 1, upcalls)) > 0)
1238 return count == 1 ? provider_flush_store_cache(prov) : 1;
1243 int ossl_provider_deactivate(OSSL_PROVIDER *prov, int removechildren)
1248 || (count = provider_deactivate(prov, 1, removechildren)) < 0)
1250 return count == 0 ? provider_remove_store_methods(prov) : 1;
1253 void *ossl_provider_ctx(const OSSL_PROVIDER *prov)
1255 return prov != NULL ? prov->provctx : NULL;
1259 * This function only does something once when store->use_fallbacks == 1,
1260 * and then sets store->use_fallbacks = 0, so the second call and so on is
1261 * effectively a no-op.
1263 static int provider_activate_fallbacks(struct provider_store_st *store)
1266 int activated_fallback_count = 0;
1268 const OSSL_PROVIDER_INFO *p;
1270 if (!CRYPTO_THREAD_read_lock(store->lock))
1272 use_fallbacks = store->use_fallbacks;
1273 CRYPTO_THREAD_unlock(store->lock);
1277 if (!CRYPTO_THREAD_write_lock(store->lock))
1279 /* Check again, just in case another thread changed it */
1280 use_fallbacks = store->use_fallbacks;
1281 if (!use_fallbacks) {
1282 CRYPTO_THREAD_unlock(store->lock);
1286 for (p = ossl_predefined_providers; p->name != NULL; p++) {
1287 OSSL_PROVIDER *prov = NULL;
1289 if (!p->is_fallback)
1292 * We use the internal constructor directly here,
1293 * otherwise we get a call loop
1295 prov = provider_new(p->name, p->init, NULL);
1298 prov->libctx = store->libctx;
1300 prov->error_lib = ERR_get_next_error_library();
1304 * We are calling provider_activate while holding the store lock. This
1305 * means the init function will be called while holding a lock. Normally
1306 * we try to avoid calling a user callback while holding a lock.
1307 * However, fallbacks are never third party providers so we accept this.
1309 if (provider_activate(prov, 0, 0) < 0) {
1310 ossl_provider_free(prov);
1313 prov->store = store;
1314 if (sk_OSSL_PROVIDER_push(store->providers, prov) == 0) {
1315 ossl_provider_free(prov);
1318 activated_fallback_count++;
1321 if (activated_fallback_count > 0) {
1322 store->use_fallbacks = 0;
1326 CRYPTO_THREAD_unlock(store->lock);
1330 int ossl_provider_doall_activated(OSSL_LIB_CTX *ctx,
1331 int (*cb)(OSSL_PROVIDER *provider,
1335 int ret = 0, curr, max, ref = 0;
1336 struct provider_store_st *store = get_provider_store(ctx);
1337 STACK_OF(OSSL_PROVIDER) *provs = NULL;
1341 * Make sure any providers are loaded from config before we try to use
1344 if (ossl_lib_ctx_is_default(ctx))
1345 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
1350 if (!provider_activate_fallbacks(store))
1354 * Under lock, grab a copy of the provider list and up_ref each
1355 * provider so that they don't disappear underneath us.
1357 if (!CRYPTO_THREAD_read_lock(store->lock))
1359 provs = sk_OSSL_PROVIDER_dup(store->providers);
1360 if (provs == NULL) {
1361 CRYPTO_THREAD_unlock(store->lock);
1364 max = sk_OSSL_PROVIDER_num(provs);
1366 * We work backwards through the stack so that we can safely delete items
1369 for (curr = max - 1; curr >= 0; curr--) {
1370 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1372 if (!CRYPTO_THREAD_write_lock(prov->flag_lock))
1374 if (prov->flag_activated) {
1376 * We call CRYPTO_UP_REF directly rather than ossl_provider_up_ref
1377 * to avoid upping the ref count on the parent provider, which we
1378 * must not do while holding locks.
1380 if (CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock) <= 0) {
1381 CRYPTO_THREAD_unlock(prov->flag_lock);
1385 * It's already activated, but we up the activated count to ensure
1386 * it remains activated until after we've called the user callback.
1387 * We do this with no locking (because we already hold the locks)
1388 * and no upcalls (which must not be called when locks are held). In
1389 * theory this could mean the parent provider goes inactive, whilst
1390 * still activated in the child for a short period. That's ok.
1392 if (provider_activate(prov, 0, 0) < 0) {
1393 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
1394 CRYPTO_THREAD_unlock(prov->flag_lock);
1398 sk_OSSL_PROVIDER_delete(provs, curr);
1401 CRYPTO_THREAD_unlock(prov->flag_lock);
1403 CRYPTO_THREAD_unlock(store->lock);
1406 * Now, we sweep through all providers not under lock
1408 for (curr = 0; curr < max; curr++) {
1409 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1411 if (!cb(prov, cbdata)) {
1422 CRYPTO_THREAD_unlock(store->lock);
1425 * The pop_free call doesn't do what we want on an error condition. We
1426 * either start from the first item in the stack, or part way through if
1427 * we only processed some of the items.
1429 for (curr++; curr < max; curr++) {
1430 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1432 provider_deactivate(prov, 0, 1);
1434 * As above where we did the up-ref, we don't call ossl_provider_free
1435 * to avoid making upcalls. There should always be at least one ref
1436 * to the provider in the store, so this should never drop to 0.
1438 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
1440 * Not much we can do if this assert ever fails. So we don't use
1445 sk_OSSL_PROVIDER_free(provs);
1449 int OSSL_PROVIDER_available(OSSL_LIB_CTX *libctx, const char *name)
1451 OSSL_PROVIDER *prov = NULL;
1453 struct provider_store_st *store = get_provider_store(libctx);
1455 if (store == NULL || !provider_activate_fallbacks(store))
1458 prov = ossl_provider_find(libctx, name, 0);
1460 if (!CRYPTO_THREAD_read_lock(prov->flag_lock))
1462 available = prov->flag_activated;
1463 CRYPTO_THREAD_unlock(prov->flag_lock);
1464 ossl_provider_free(prov);
1469 /* Getters of Provider Object data */
1470 const char *ossl_provider_name(const OSSL_PROVIDER *prov)
1475 const DSO *ossl_provider_dso(const OSSL_PROVIDER *prov)
1477 return prov->module;
1480 const char *ossl_provider_module_name(const OSSL_PROVIDER *prov)
1485 return DSO_get_filename(prov->module);
1489 const char *ossl_provider_module_path(const OSSL_PROVIDER *prov)
1494 /* FIXME: Ensure it's a full path */
1495 return DSO_get_filename(prov->module);
1499 void *ossl_provider_prov_ctx(const OSSL_PROVIDER *prov)
1502 return prov->provctx;
1507 const OSSL_DISPATCH *ossl_provider_get0_dispatch(const OSSL_PROVIDER *prov)
1510 return prov->dispatch;
1515 OSSL_LIB_CTX *ossl_provider_libctx(const OSSL_PROVIDER *prov)
1517 return prov != NULL ? prov->libctx : NULL;
1520 /* Wrappers around calls to the provider */
1521 void ossl_provider_teardown(const OSSL_PROVIDER *prov)
1523 if (prov->teardown != NULL
1528 prov->teardown(prov->provctx);
1531 const OSSL_PARAM *ossl_provider_gettable_params(const OSSL_PROVIDER *prov)
1533 return prov->gettable_params == NULL
1534 ? NULL : prov->gettable_params(prov->provctx);
1537 int ossl_provider_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
1539 return prov->get_params == NULL
1540 ? 0 : prov->get_params(prov->provctx, params);
1543 int ossl_provider_self_test(const OSSL_PROVIDER *prov)
1547 if (prov->self_test == NULL)
1549 ret = prov->self_test(prov->provctx);
1551 (void)provider_remove_store_methods((OSSL_PROVIDER *)prov);
1555 int ossl_provider_get_capabilities(const OSSL_PROVIDER *prov,
1556 const char *capability,
1560 return prov->get_capabilities == NULL
1561 ? 1 : prov->get_capabilities(prov->provctx, capability, cb, arg);
1564 const OSSL_ALGORITHM *ossl_provider_query_operation(const OSSL_PROVIDER *prov,
1568 const OSSL_ALGORITHM *res;
1570 if (prov->query_operation == NULL)
1572 res = prov->query_operation(prov->provctx, operation_id, no_cache);
1573 #if defined(OPENSSL_NO_CACHED_FETCH)
1574 /* Forcing the non-caching of queries */
1575 if (no_cache != NULL)
1581 void ossl_provider_unquery_operation(const OSSL_PROVIDER *prov,
1583 const OSSL_ALGORITHM *algs)
1585 if (prov->unquery_operation != NULL)
1586 prov->unquery_operation(prov->provctx, operation_id, algs);
1589 int ossl_provider_set_operation_bit(OSSL_PROVIDER *provider, size_t bitnum)
1591 size_t byte = bitnum / 8;
1592 unsigned char bit = (1 << (bitnum % 8)) & 0xFF;
1594 if (!CRYPTO_THREAD_write_lock(provider->opbits_lock))
1596 if (provider->operation_bits_sz <= byte) {
1597 unsigned char *tmp = OPENSSL_realloc(provider->operation_bits,
1601 CRYPTO_THREAD_unlock(provider->opbits_lock);
1602 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
1605 provider->operation_bits = tmp;
1606 memset(provider->operation_bits + provider->operation_bits_sz,
1607 '\0', byte + 1 - provider->operation_bits_sz);
1608 provider->operation_bits_sz = byte + 1;
1610 provider->operation_bits[byte] |= bit;
1611 CRYPTO_THREAD_unlock(provider->opbits_lock);
1615 int ossl_provider_test_operation_bit(OSSL_PROVIDER *provider, size_t bitnum,
1618 size_t byte = bitnum / 8;
1619 unsigned char bit = (1 << (bitnum % 8)) & 0xFF;
1621 if (!ossl_assert(result != NULL)) {
1622 ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
1627 if (!CRYPTO_THREAD_read_lock(provider->opbits_lock))
1629 if (provider->operation_bits_sz > byte)
1630 *result = ((provider->operation_bits[byte] & bit) != 0);
1631 CRYPTO_THREAD_unlock(provider->opbits_lock);
1636 const OSSL_CORE_HANDLE *ossl_provider_get_parent(OSSL_PROVIDER *prov)
1638 return prov->handle;
1641 int ossl_provider_is_child(const OSSL_PROVIDER *prov)
1643 return prov->ischild;
1646 int ossl_provider_set_child(OSSL_PROVIDER *prov, const OSSL_CORE_HANDLE *handle)
1648 prov->handle = handle;
1654 int ossl_provider_default_props_update(OSSL_LIB_CTX *libctx, const char *props)
1657 struct provider_store_st *store = NULL;
1659 OSSL_PROVIDER_CHILD_CB *child_cb;
1661 if ((store = get_provider_store(libctx)) == NULL)
1664 if (!CRYPTO_THREAD_read_lock(store->lock))
1667 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1668 for (i = 0; i < max; i++) {
1669 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1670 child_cb->global_props_cb(props, child_cb->cbdata);
1673 CRYPTO_THREAD_unlock(store->lock);
1678 static int ossl_provider_register_child_cb(const OSSL_CORE_HANDLE *handle,
1680 const OSSL_CORE_HANDLE *provider,
1683 const OSSL_CORE_HANDLE *provider,
1685 int (*global_props_cb)(
1691 * This is really an OSSL_PROVIDER that we created and cast to
1692 * OSSL_CORE_HANDLE originally. Therefore it is safe to cast it back.
1694 OSSL_PROVIDER *thisprov = (OSSL_PROVIDER *)handle;
1695 OSSL_PROVIDER *prov;
1696 OSSL_LIB_CTX *libctx = thisprov->libctx;
1697 struct provider_store_st *store = NULL;
1698 int ret = 0, i, max;
1699 OSSL_PROVIDER_CHILD_CB *child_cb;
1700 char *propsstr = NULL;
1702 if ((store = get_provider_store(libctx)) == NULL)
1705 child_cb = OPENSSL_malloc(sizeof(*child_cb));
1706 if (child_cb == NULL)
1708 child_cb->prov = thisprov;
1709 child_cb->create_cb = create_cb;
1710 child_cb->remove_cb = remove_cb;
1711 child_cb->global_props_cb = global_props_cb;
1712 child_cb->cbdata = cbdata;
1714 if (!CRYPTO_THREAD_write_lock(store->lock)) {
1715 OPENSSL_free(child_cb);
1718 propsstr = evp_get_global_properties_str(libctx, 0);
1720 if (propsstr != NULL) {
1721 global_props_cb(propsstr, cbdata);
1722 OPENSSL_free(propsstr);
1724 max = sk_OSSL_PROVIDER_num(store->providers);
1725 for (i = 0; i < max; i++) {
1728 prov = sk_OSSL_PROVIDER_value(store->providers, i);
1730 if (!CRYPTO_THREAD_read_lock(prov->flag_lock))
1732 activated = prov->flag_activated;
1733 CRYPTO_THREAD_unlock(prov->flag_lock);
1735 * We hold the store lock while calling the user callback. This means
1736 * that the user callback must be short and simple and not do anything
1737 * likely to cause a deadlock. We don't hold the flag_lock during this
1738 * call. In theory this means that another thread could deactivate it
1739 * while we are calling create. This is ok because the other thread
1740 * will also call remove_cb, but won't be able to do so until we release
1743 if (activated && !create_cb((OSSL_CORE_HANDLE *)prov, cbdata))
1748 ret = sk_OSSL_PROVIDER_CHILD_CB_push(store->child_cbs, child_cb);
1750 if (i != max || ret <= 0) {
1751 /* Failed during creation. Remove everything we just added */
1752 for (; i >= 0; i--) {
1753 prov = sk_OSSL_PROVIDER_value(store->providers, i);
1754 remove_cb((OSSL_CORE_HANDLE *)prov, cbdata);
1756 OPENSSL_free(child_cb);
1759 CRYPTO_THREAD_unlock(store->lock);
1764 static void ossl_provider_deregister_child_cb(const OSSL_CORE_HANDLE *handle)
1767 * This is really an OSSL_PROVIDER that we created and cast to
1768 * OSSL_CORE_HANDLE originally. Therefore it is safe to cast it back.
1770 OSSL_PROVIDER *thisprov = (OSSL_PROVIDER *)handle;
1771 OSSL_LIB_CTX *libctx = thisprov->libctx;
1772 struct provider_store_st *store = NULL;
1774 OSSL_PROVIDER_CHILD_CB *child_cb;
1776 if ((store = get_provider_store(libctx)) == NULL)
1779 if (!CRYPTO_THREAD_write_lock(store->lock))
1781 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1782 for (i = 0; i < max; i++) {
1783 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1784 if (child_cb->prov == thisprov) {
1785 /* Found an entry */
1786 sk_OSSL_PROVIDER_CHILD_CB_delete(store->child_cbs, i);
1787 OPENSSL_free(child_cb);
1791 CRYPTO_THREAD_unlock(store->lock);
1796 * Core functions for the provider
1797 * ===============================
1799 * This is the set of functions that the core makes available to the provider
1803 * This returns a list of Provider Object parameters with their types, for
1804 * discovery. We do not expect that many providers will use this, but one
1807 static const OSSL_PARAM param_types[] = {
1808 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_VERSION, OSSL_PARAM_UTF8_PTR, NULL, 0),
1809 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_PROV_NAME, OSSL_PARAM_UTF8_PTR,
1812 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_MODULE_FILENAME, OSSL_PARAM_UTF8_PTR,
1819 * Forward declare all the functions that are provided aa dispatch.
1820 * This ensures that the compiler will complain if they aren't defined
1821 * with the correct signature.
1823 static OSSL_FUNC_core_gettable_params_fn core_gettable_params;
1824 static OSSL_FUNC_core_get_params_fn core_get_params;
1825 static OSSL_FUNC_core_get_libctx_fn core_get_libctx;
1826 static OSSL_FUNC_core_thread_start_fn core_thread_start;
1828 static OSSL_FUNC_core_new_error_fn core_new_error;
1829 static OSSL_FUNC_core_set_error_debug_fn core_set_error_debug;
1830 static OSSL_FUNC_core_vset_error_fn core_vset_error;
1831 static OSSL_FUNC_core_set_error_mark_fn core_set_error_mark;
1832 static OSSL_FUNC_core_clear_last_error_mark_fn core_clear_last_error_mark;
1833 static OSSL_FUNC_core_pop_error_to_mark_fn core_pop_error_to_mark;
1834 OSSL_FUNC_BIO_new_file_fn ossl_core_bio_new_file;
1835 OSSL_FUNC_BIO_new_membuf_fn ossl_core_bio_new_mem_buf;
1836 OSSL_FUNC_BIO_read_ex_fn ossl_core_bio_read_ex;
1837 OSSL_FUNC_BIO_write_ex_fn ossl_core_bio_write_ex;
1838 OSSL_FUNC_BIO_gets_fn ossl_core_bio_gets;
1839 OSSL_FUNC_BIO_puts_fn ossl_core_bio_puts;
1840 OSSL_FUNC_BIO_up_ref_fn ossl_core_bio_up_ref;
1841 OSSL_FUNC_BIO_free_fn ossl_core_bio_free;
1842 OSSL_FUNC_BIO_vprintf_fn ossl_core_bio_vprintf;
1843 OSSL_FUNC_BIO_vsnprintf_fn BIO_vsnprintf;
1844 static OSSL_FUNC_self_test_cb_fn core_self_test_get_callback;
1845 OSSL_FUNC_get_entropy_fn ossl_rand_get_entropy;
1846 OSSL_FUNC_cleanup_entropy_fn ossl_rand_cleanup_entropy;
1847 OSSL_FUNC_get_nonce_fn ossl_rand_get_nonce;
1848 OSSL_FUNC_cleanup_nonce_fn ossl_rand_cleanup_nonce;
1850 OSSL_FUNC_CRYPTO_malloc_fn CRYPTO_malloc;
1851 OSSL_FUNC_CRYPTO_zalloc_fn CRYPTO_zalloc;
1852 OSSL_FUNC_CRYPTO_free_fn CRYPTO_free;
1853 OSSL_FUNC_CRYPTO_clear_free_fn CRYPTO_clear_free;
1854 OSSL_FUNC_CRYPTO_realloc_fn CRYPTO_realloc;
1855 OSSL_FUNC_CRYPTO_clear_realloc_fn CRYPTO_clear_realloc;
1856 OSSL_FUNC_CRYPTO_secure_malloc_fn CRYPTO_secure_malloc;
1857 OSSL_FUNC_CRYPTO_secure_zalloc_fn CRYPTO_secure_zalloc;
1858 OSSL_FUNC_CRYPTO_secure_free_fn CRYPTO_secure_free;
1859 OSSL_FUNC_CRYPTO_secure_clear_free_fn CRYPTO_secure_clear_free;
1860 OSSL_FUNC_CRYPTO_secure_allocated_fn CRYPTO_secure_allocated;
1861 OSSL_FUNC_OPENSSL_cleanse_fn OPENSSL_cleanse;
1863 OSSL_FUNC_provider_register_child_cb_fn ossl_provider_register_child_cb;
1864 OSSL_FUNC_provider_deregister_child_cb_fn ossl_provider_deregister_child_cb;
1865 static OSSL_FUNC_provider_name_fn core_provider_get0_name;
1866 static OSSL_FUNC_provider_get0_provider_ctx_fn core_provider_get0_provider_ctx;
1867 static OSSL_FUNC_provider_get0_dispatch_fn core_provider_get0_dispatch;
1868 static OSSL_FUNC_provider_up_ref_fn core_provider_up_ref_intern;
1869 static OSSL_FUNC_provider_free_fn core_provider_free_intern;
1870 static OSSL_FUNC_core_obj_add_sigid_fn core_obj_add_sigid;
1871 static OSSL_FUNC_core_obj_create_fn core_obj_create;
1874 static const OSSL_PARAM *core_gettable_params(const OSSL_CORE_HANDLE *handle)
1879 static int core_get_params(const OSSL_CORE_HANDLE *handle, OSSL_PARAM params[])
1884 * We created this object originally and we know it is actually an
1885 * OSSL_PROVIDER *, so the cast is safe
1887 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1889 if ((p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_CORE_VERSION)) != NULL)
1890 OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR);
1891 if ((p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_CORE_PROV_NAME)) != NULL)
1892 OSSL_PARAM_set_utf8_ptr(p, prov->name);
1895 if ((p = OSSL_PARAM_locate(params,
1896 OSSL_PROV_PARAM_CORE_MODULE_FILENAME)) != NULL)
1897 OSSL_PARAM_set_utf8_ptr(p, ossl_provider_module_path(prov));
1900 if (prov->parameters == NULL)
1903 for (i = 0; i < sk_INFOPAIR_num(prov->parameters); i++) {
1904 INFOPAIR *pair = sk_INFOPAIR_value(prov->parameters, i);
1906 if ((p = OSSL_PARAM_locate(params, pair->name)) != NULL)
1907 OSSL_PARAM_set_utf8_ptr(p, pair->value);
1912 static OPENSSL_CORE_CTX *core_get_libctx(const OSSL_CORE_HANDLE *handle)
1915 * We created this object originally and we know it is actually an
1916 * OSSL_PROVIDER *, so the cast is safe
1918 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1921 * Using ossl_provider_libctx would be wrong as that returns
1922 * NULL for |prov| == NULL and NULL libctx has a special meaning
1923 * that does not apply here. Here |prov| == NULL can happen only in
1924 * case of a coding error.
1926 assert(prov != NULL);
1927 return (OPENSSL_CORE_CTX *)prov->libctx;
1930 static int core_thread_start(const OSSL_CORE_HANDLE *handle,
1931 OSSL_thread_stop_handler_fn handfn,
1935 * We created this object originally and we know it is actually an
1936 * OSSL_PROVIDER *, so the cast is safe
1938 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1940 return ossl_init_thread_start(prov, arg, handfn);
1944 * The FIPS module inner provider doesn't implement these. They aren't
1945 * needed there, since the FIPS module upcalls are always the outer provider
1950 * These error functions should use |handle| to select the proper
1951 * library context to report in the correct error stack if error
1952 * stacks become tied to the library context.
1953 * We cannot currently do that since there's no support for it in the
1956 static void core_new_error(const OSSL_CORE_HANDLE *handle)
1961 static void core_set_error_debug(const OSSL_CORE_HANDLE *handle,
1962 const char *file, int line, const char *func)
1964 ERR_set_debug(file, line, func);
1967 static void core_vset_error(const OSSL_CORE_HANDLE *handle,
1968 uint32_t reason, const char *fmt, va_list args)
1971 * We created this object originally and we know it is actually an
1972 * OSSL_PROVIDER *, so the cast is safe
1974 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1977 * If the uppermost 8 bits are non-zero, it's an OpenSSL library
1978 * error and will be treated as such. Otherwise, it's a new style
1979 * provider error and will be treated as such.
1981 if (ERR_GET_LIB(reason) != 0) {
1982 ERR_vset_error(ERR_GET_LIB(reason), ERR_GET_REASON(reason), fmt, args);
1984 ERR_vset_error(prov->error_lib, (int)reason, fmt, args);
1988 static int core_set_error_mark(const OSSL_CORE_HANDLE *handle)
1990 return ERR_set_mark();
1993 static int core_clear_last_error_mark(const OSSL_CORE_HANDLE *handle)
1995 return ERR_clear_last_mark();
1998 static int core_pop_error_to_mark(const OSSL_CORE_HANDLE *handle)
2000 return ERR_pop_to_mark();
2003 static void core_self_test_get_callback(OPENSSL_CORE_CTX *libctx,
2004 OSSL_CALLBACK **cb, void **cbarg)
2006 OSSL_SELF_TEST_get_callback((OSSL_LIB_CTX *)libctx, cb, cbarg);
2009 static const char *core_provider_get0_name(const OSSL_CORE_HANDLE *prov)
2011 return OSSL_PROVIDER_get0_name((const OSSL_PROVIDER *)prov);
2014 static void *core_provider_get0_provider_ctx(const OSSL_CORE_HANDLE *prov)
2016 return OSSL_PROVIDER_get0_provider_ctx((const OSSL_PROVIDER *)prov);
2019 static const OSSL_DISPATCH *
2020 core_provider_get0_dispatch(const OSSL_CORE_HANDLE *prov)
2022 return OSSL_PROVIDER_get0_dispatch((const OSSL_PROVIDER *)prov);
2025 static int core_provider_up_ref_intern(const OSSL_CORE_HANDLE *prov,
2028 return provider_up_ref_intern((OSSL_PROVIDER *)prov, activate);
2031 static int core_provider_free_intern(const OSSL_CORE_HANDLE *prov,
2034 return provider_free_intern((OSSL_PROVIDER *)prov, deactivate);
2037 static int core_obj_add_sigid(const OSSL_CORE_HANDLE *prov,
2038 const char *sign_name, const char *digest_name,
2039 const char *pkey_name)
2041 int sign_nid = OBJ_txt2nid(sign_name);
2042 int digest_nid = NID_undef;
2043 int pkey_nid = OBJ_txt2nid(pkey_name);
2045 if (digest_name != NULL && digest_name[0] != '\0'
2046 && (digest_nid = OBJ_txt2nid(digest_name)) == NID_undef)
2049 if (sign_nid == NID_undef)
2053 * Check if it already exists. This is a success if so (even if we don't
2054 * have nids for the digest/pkey)
2056 if (OBJ_find_sigid_algs(sign_nid, NULL, NULL))
2059 if (pkey_nid == NID_undef)
2062 return OBJ_add_sigid(sign_nid, digest_nid, pkey_nid);
2065 static int core_obj_create(const OSSL_CORE_HANDLE *prov, const char *oid,
2066 const char *sn, const char *ln)
2068 /* Check if it already exists and create it if not */
2069 return OBJ_txt2nid(oid) != NID_undef
2070 || OBJ_create(oid, sn, ln) != NID_undef;
2072 #endif /* FIPS_MODULE */
2075 * Functions provided by the core.
2077 static const OSSL_DISPATCH core_dispatch_[] = {
2078 { OSSL_FUNC_CORE_GETTABLE_PARAMS, (void (*)(void))core_gettable_params },
2079 { OSSL_FUNC_CORE_GET_PARAMS, (void (*)(void))core_get_params },
2080 { OSSL_FUNC_CORE_GET_LIBCTX, (void (*)(void))core_get_libctx },
2081 { OSSL_FUNC_CORE_THREAD_START, (void (*)(void))core_thread_start },
2083 { OSSL_FUNC_CORE_NEW_ERROR, (void (*)(void))core_new_error },
2084 { OSSL_FUNC_CORE_SET_ERROR_DEBUG, (void (*)(void))core_set_error_debug },
2085 { OSSL_FUNC_CORE_VSET_ERROR, (void (*)(void))core_vset_error },
2086 { OSSL_FUNC_CORE_SET_ERROR_MARK, (void (*)(void))core_set_error_mark },
2087 { OSSL_FUNC_CORE_CLEAR_LAST_ERROR_MARK,
2088 (void (*)(void))core_clear_last_error_mark },
2089 { OSSL_FUNC_CORE_POP_ERROR_TO_MARK, (void (*)(void))core_pop_error_to_mark },
2090 { OSSL_FUNC_BIO_NEW_FILE, (void (*)(void))ossl_core_bio_new_file },
2091 { OSSL_FUNC_BIO_NEW_MEMBUF, (void (*)(void))ossl_core_bio_new_mem_buf },
2092 { OSSL_FUNC_BIO_READ_EX, (void (*)(void))ossl_core_bio_read_ex },
2093 { OSSL_FUNC_BIO_WRITE_EX, (void (*)(void))ossl_core_bio_write_ex },
2094 { OSSL_FUNC_BIO_GETS, (void (*)(void))ossl_core_bio_gets },
2095 { OSSL_FUNC_BIO_PUTS, (void (*)(void))ossl_core_bio_puts },
2096 { OSSL_FUNC_BIO_CTRL, (void (*)(void))ossl_core_bio_ctrl },
2097 { OSSL_FUNC_BIO_UP_REF, (void (*)(void))ossl_core_bio_up_ref },
2098 { OSSL_FUNC_BIO_FREE, (void (*)(void))ossl_core_bio_free },
2099 { OSSL_FUNC_BIO_VPRINTF, (void (*)(void))ossl_core_bio_vprintf },
2100 { OSSL_FUNC_BIO_VSNPRINTF, (void (*)(void))BIO_vsnprintf },
2101 { OSSL_FUNC_SELF_TEST_CB, (void (*)(void))core_self_test_get_callback },
2102 { OSSL_FUNC_GET_ENTROPY, (void (*)(void))ossl_rand_get_entropy },
2103 { OSSL_FUNC_CLEANUP_ENTROPY, (void (*)(void))ossl_rand_cleanup_entropy },
2104 { OSSL_FUNC_GET_NONCE, (void (*)(void))ossl_rand_get_nonce },
2105 { OSSL_FUNC_CLEANUP_NONCE, (void (*)(void))ossl_rand_cleanup_nonce },
2107 { OSSL_FUNC_CRYPTO_MALLOC, (void (*)(void))CRYPTO_malloc },
2108 { OSSL_FUNC_CRYPTO_ZALLOC, (void (*)(void))CRYPTO_zalloc },
2109 { OSSL_FUNC_CRYPTO_FREE, (void (*)(void))CRYPTO_free },
2110 { OSSL_FUNC_CRYPTO_CLEAR_FREE, (void (*)(void))CRYPTO_clear_free },
2111 { OSSL_FUNC_CRYPTO_REALLOC, (void (*)(void))CRYPTO_realloc },
2112 { OSSL_FUNC_CRYPTO_CLEAR_REALLOC, (void (*)(void))CRYPTO_clear_realloc },
2113 { OSSL_FUNC_CRYPTO_SECURE_MALLOC, (void (*)(void))CRYPTO_secure_malloc },
2114 { OSSL_FUNC_CRYPTO_SECURE_ZALLOC, (void (*)(void))CRYPTO_secure_zalloc },
2115 { OSSL_FUNC_CRYPTO_SECURE_FREE, (void (*)(void))CRYPTO_secure_free },
2116 { OSSL_FUNC_CRYPTO_SECURE_CLEAR_FREE,
2117 (void (*)(void))CRYPTO_secure_clear_free },
2118 { OSSL_FUNC_CRYPTO_SECURE_ALLOCATED,
2119 (void (*)(void))CRYPTO_secure_allocated },
2120 { OSSL_FUNC_OPENSSL_CLEANSE, (void (*)(void))OPENSSL_cleanse },
2122 { OSSL_FUNC_PROVIDER_REGISTER_CHILD_CB,
2123 (void (*)(void))ossl_provider_register_child_cb },
2124 { OSSL_FUNC_PROVIDER_DEREGISTER_CHILD_CB,
2125 (void (*)(void))ossl_provider_deregister_child_cb },
2126 { OSSL_FUNC_PROVIDER_NAME,
2127 (void (*)(void))core_provider_get0_name },
2128 { OSSL_FUNC_PROVIDER_GET0_PROVIDER_CTX,
2129 (void (*)(void))core_provider_get0_provider_ctx },
2130 { OSSL_FUNC_PROVIDER_GET0_DISPATCH,
2131 (void (*)(void))core_provider_get0_dispatch },
2132 { OSSL_FUNC_PROVIDER_UP_REF,
2133 (void (*)(void))core_provider_up_ref_intern },
2134 { OSSL_FUNC_PROVIDER_FREE,
2135 (void (*)(void))core_provider_free_intern },
2136 { OSSL_FUNC_CORE_OBJ_ADD_SIGID, (void (*)(void))core_obj_add_sigid },
2137 { OSSL_FUNC_CORE_OBJ_CREATE, (void (*)(void))core_obj_create },
2141 static const OSSL_DISPATCH *core_dispatch = core_dispatch_;