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)
377 store->provinfosz = BUILTINS_BLOCK_SIZE;
378 } else if (store->numprovinfo == store->provinfosz) {
379 OSSL_PROVIDER_INFO *tmpbuiltins;
380 size_t newsz = store->provinfosz + BUILTINS_BLOCK_SIZE;
382 tmpbuiltins = OPENSSL_realloc(store->provinfo,
383 sizeof(*store->provinfo) * newsz);
384 if (tmpbuiltins == NULL)
386 store->provinfo = tmpbuiltins;
387 store->provinfosz = newsz;
389 store->provinfo[store->numprovinfo] = *entry;
390 store->numprovinfo++;
394 CRYPTO_THREAD_unlock(store->lock);
398 OSSL_PROVIDER *ossl_provider_find(OSSL_LIB_CTX *libctx, const char *name,
401 struct provider_store_st *store = NULL;
402 OSSL_PROVIDER *prov = NULL;
404 if ((store = get_provider_store(libctx)) != NULL) {
405 OSSL_PROVIDER tmpl = { 0, };
410 * Make sure any providers are loaded from config before we try to find
414 if (ossl_lib_ctx_is_default(libctx))
415 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
419 tmpl.name = (char *)name;
421 * A "find" operation can sort the stack, and therefore a write lock is
424 if (!CRYPTO_THREAD_write_lock(store->lock))
426 if ((i = sk_OSSL_PROVIDER_find(store->providers, &tmpl)) != -1)
427 prov = sk_OSSL_PROVIDER_value(store->providers, i);
428 CRYPTO_THREAD_unlock(store->lock);
429 if (prov != NULL && !ossl_provider_up_ref(prov))
437 * Provider Object methods
438 * =======================
441 static OSSL_PROVIDER *provider_new(const char *name,
442 OSSL_provider_init_fn *init_function,
443 STACK_OF(INFOPAIR) *parameters)
445 OSSL_PROVIDER *prov = NULL;
447 if ((prov = OPENSSL_zalloc(sizeof(*prov))) == NULL)
450 if ((prov->refcnt_lock = CRYPTO_THREAD_lock_new()) == NULL) {
452 ERR_raise(ERR_LIB_CRYPTO, ERR_R_CRYPTO_LIB);
457 prov->refcnt = 1; /* 1 One reference to be returned */
459 if ((prov->opbits_lock = CRYPTO_THREAD_lock_new()) == NULL
460 || (prov->flag_lock = CRYPTO_THREAD_lock_new()) == NULL
461 || (prov->parameters = sk_INFOPAIR_deep_copy(parameters,
463 infopair_free)) == NULL) {
464 ossl_provider_free(prov);
465 ERR_raise(ERR_LIB_CRYPTO, ERR_R_CRYPTO_LIB);
468 if ((prov->name = OPENSSL_strdup(name)) == NULL) {
469 ossl_provider_free(prov);
473 prov->init_function = init_function;
478 int ossl_provider_up_ref(OSSL_PROVIDER *prov)
482 if (CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock) <= 0)
487 if (!ossl_provider_up_ref_parent(prov, 0)) {
488 ossl_provider_free(prov);
498 static int provider_up_ref_intern(OSSL_PROVIDER *prov, int activate)
501 return ossl_provider_activate(prov, 1, 0);
503 return ossl_provider_up_ref(prov);
506 static int provider_free_intern(OSSL_PROVIDER *prov, int deactivate)
509 return ossl_provider_deactivate(prov, 1);
511 ossl_provider_free(prov);
517 * We assume that the requested provider does not already exist in the store.
518 * The caller should check. If it does exist then adding it to the store later
521 OSSL_PROVIDER *ossl_provider_new(OSSL_LIB_CTX *libctx, const char *name,
522 OSSL_provider_init_fn *init_function,
525 struct provider_store_st *store = NULL;
526 OSSL_PROVIDER_INFO template;
527 OSSL_PROVIDER *prov = NULL;
529 if ((store = get_provider_store(libctx)) == NULL)
532 memset(&template, 0, sizeof(template));
533 if (init_function == NULL) {
534 const OSSL_PROVIDER_INFO *p;
537 /* Check if this is a predefined builtin provider */
538 for (p = ossl_predefined_providers; p->name != NULL; p++) {
539 if (strcmp(p->name, name) == 0) {
544 if (p->name == NULL) {
545 /* Check if this is a user added builtin provider */
546 if (!CRYPTO_THREAD_read_lock(store->lock))
548 for (i = 0, p = store->provinfo; i < store->numprovinfo; p++, i++) {
549 if (strcmp(p->name, name) == 0) {
554 CRYPTO_THREAD_unlock(store->lock);
557 template.init = init_function;
560 /* provider_new() generates an error, so no need here */
561 if ((prov = provider_new(name, template.init, template.parameters)) == NULL)
564 prov->libctx = libctx;
566 prov->error_lib = ERR_get_next_error_library();
570 * At this point, the provider is only partially "loaded". To be
571 * fully "loaded", ossl_provider_activate() must also be called and it must
572 * then be added to the provider store.
578 /* Assumes that the store lock is held */
579 static int create_provider_children(OSSL_PROVIDER *prov)
583 struct provider_store_st *store = prov->store;
584 OSSL_PROVIDER_CHILD_CB *child_cb;
587 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
588 for (i = 0; i < max; i++) {
590 * This is newly activated (activatecnt == 1), so we need to
591 * create child providers as necessary.
593 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
594 ret &= child_cb->create_cb((OSSL_CORE_HANDLE *)prov, child_cb->cbdata);
601 int ossl_provider_add_to_store(OSSL_PROVIDER *prov, OSSL_PROVIDER **actualprov,
602 int retain_fallbacks)
604 struct provider_store_st *store;
606 OSSL_PROVIDER tmpl = { 0, };
607 OSSL_PROVIDER *actualtmp = NULL;
609 if (actualprov != NULL)
612 if ((store = get_provider_store(prov->libctx)) == NULL)
615 if (!CRYPTO_THREAD_write_lock(store->lock))
618 tmpl.name = (char *)prov->name;
619 idx = sk_OSSL_PROVIDER_find(store->providers, &tmpl);
623 actualtmp = sk_OSSL_PROVIDER_value(store->providers, idx);
626 if (sk_OSSL_PROVIDER_push(store->providers, prov) == 0)
629 if (!create_provider_children(prov)) {
630 sk_OSSL_PROVIDER_delete_ptr(store->providers, prov);
633 if (!retain_fallbacks)
634 store->use_fallbacks = 0;
637 CRYPTO_THREAD_unlock(store->lock);
639 if (actualprov != NULL) {
640 if (!ossl_provider_up_ref(actualtmp)) {
641 ERR_raise(ERR_LIB_CRYPTO, ERR_R_CRYPTO_LIB);
645 *actualprov = actualtmp;
650 * The provider is already in the store. Probably two threads
651 * independently initialised their own provider objects with the same
652 * name and raced to put them in the store. This thread lost. We
653 * deactivate the one we just created and use the one that already
655 * If we get here then we know we did not create provider children
656 * above, so we inform ossl_provider_deactivate not to attempt to remove
659 ossl_provider_deactivate(prov, 0);
660 ossl_provider_free(prov);
666 CRYPTO_THREAD_unlock(store->lock);
670 void ossl_provider_free(OSSL_PROVIDER *prov)
675 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
678 * When the refcount drops to zero, we clean up the provider.
679 * Note that this also does teardown, which may seem late,
680 * considering that init happens on first activation. However,
681 * there may be other structures hanging on to the provider after
682 * the last deactivation and may therefore need full access to the
683 * provider's services. Therefore, we deinit late.
686 if (prov->flag_initialized) {
687 ossl_provider_teardown(prov);
688 #ifndef OPENSSL_NO_ERR
690 if (prov->error_strings != NULL) {
691 ERR_unload_strings(prov->error_lib, prov->error_strings);
692 OPENSSL_free(prov->error_strings);
693 prov->error_strings = NULL;
697 OPENSSL_free(prov->operation_bits);
698 prov->operation_bits = NULL;
699 prov->operation_bits_sz = 0;
700 prov->flag_initialized = 0;
705 * We deregister thread handling whether or not the provider was
706 * initialized. If init was attempted but was not successful then
707 * the provider may still have registered a thread handler.
709 ossl_init_thread_deregister(prov);
710 DSO_free(prov->module);
712 OPENSSL_free(prov->name);
713 OPENSSL_free(prov->path);
714 sk_INFOPAIR_pop_free(prov->parameters, infopair_free);
715 CRYPTO_THREAD_lock_free(prov->opbits_lock);
716 CRYPTO_THREAD_lock_free(prov->flag_lock);
718 CRYPTO_THREAD_lock_free(prov->refcnt_lock);
723 else if (prov->ischild) {
724 ossl_provider_free_parent(prov, 0);
731 int ossl_provider_set_module_path(OSSL_PROVIDER *prov, const char *module_path)
733 OPENSSL_free(prov->path);
735 if (module_path == NULL)
737 if ((prov->path = OPENSSL_strdup(module_path)) != NULL)
742 static int infopair_add(STACK_OF(INFOPAIR) **infopairsk, const char *name,
745 INFOPAIR *pair = NULL;
747 if ((pair = OPENSSL_zalloc(sizeof(*pair))) == NULL
748 || (pair->name = OPENSSL_strdup(name)) == NULL
749 || (pair->value = OPENSSL_strdup(value)) == NULL)
752 if ((*infopairsk == NULL
753 && (*infopairsk = sk_INFOPAIR_new_null()) == NULL)
754 || sk_INFOPAIR_push(*infopairsk, pair) <= 0) {
755 ERR_raise(ERR_LIB_CRYPTO, ERR_R_CRYPTO_LIB);
763 OPENSSL_free(pair->name);
764 OPENSSL_free(pair->value);
770 int ossl_provider_add_parameter(OSSL_PROVIDER *prov,
771 const char *name, const char *value)
773 return infopair_add(&prov->parameters, name, value);
776 int ossl_provider_info_add_parameter(OSSL_PROVIDER_INFO *provinfo,
780 return infopair_add(&provinfo->parameters, name, value);
784 * Provider activation.
786 * What "activation" means depends on the provider form; for built in
787 * providers (in the library or the application alike), the provider
788 * can already be considered to be loaded, all that's needed is to
789 * initialize it. However, for dynamically loadable provider modules,
790 * we must first load that module.
792 * Built in modules are distinguished from dynamically loaded modules
793 * with an already assigned init function.
795 static const OSSL_DISPATCH *core_dispatch; /* Define further down */
797 int OSSL_PROVIDER_set_default_search_path(OSSL_LIB_CTX *libctx,
800 struct provider_store_st *store;
804 p = OPENSSL_strdup(path);
808 if ((store = get_provider_store(libctx)) != NULL
809 && CRYPTO_THREAD_write_lock(store->default_path_lock)) {
810 OPENSSL_free(store->default_path);
811 store->default_path = p;
812 CRYPTO_THREAD_unlock(store->default_path_lock);
819 const char *OSSL_PROVIDER_get0_default_search_path(OSSL_LIB_CTX *libctx)
821 struct provider_store_st *store;
824 if ((store = get_provider_store(libctx)) != NULL
825 && CRYPTO_THREAD_read_lock(store->default_path_lock)) {
826 path = store->default_path;
827 CRYPTO_THREAD_unlock(store->default_path_lock);
833 * Internal version that doesn't affect the store flags, and thereby avoid
834 * locking. Direct callers must remember to set the store flags when
837 static int provider_init(OSSL_PROVIDER *prov)
839 const OSSL_DISPATCH *provider_dispatch = NULL;
840 void *tmp_provctx = NULL; /* safety measure */
841 #ifndef OPENSSL_NO_ERR
843 OSSL_FUNC_provider_get_reason_strings_fn *p_get_reason_strings = NULL;
848 if (!ossl_assert(!prov->flag_initialized)) {
849 ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
854 * If the init function isn't set, it indicates that this provider is
857 if (prov->init_function == NULL) {
861 if (prov->module == NULL) {
862 char *allocated_path = NULL;
863 const char *module_path = NULL;
864 char *merged_path = NULL;
865 const char *load_dir = NULL;
866 char *allocated_load_dir = NULL;
867 struct provider_store_st *store;
869 if ((prov->module = DSO_new()) == NULL) {
870 /* DSO_new() generates an error already */
874 if ((store = get_provider_store(prov->libctx)) == NULL
875 || !CRYPTO_THREAD_read_lock(store->default_path_lock))
878 if (store->default_path != NULL) {
879 allocated_load_dir = OPENSSL_strdup(store->default_path);
880 CRYPTO_THREAD_unlock(store->default_path_lock);
881 if (allocated_load_dir == NULL)
883 load_dir = allocated_load_dir;
885 CRYPTO_THREAD_unlock(store->default_path_lock);
888 if (load_dir == NULL) {
889 load_dir = ossl_safe_getenv("OPENSSL_MODULES");
890 if (load_dir == NULL)
891 load_dir = MODULESDIR;
894 DSO_ctrl(prov->module, DSO_CTRL_SET_FLAGS,
895 DSO_FLAG_NAME_TRANSLATION_EXT_ONLY, NULL);
897 module_path = prov->path;
898 if (module_path == NULL)
899 module_path = allocated_path =
900 DSO_convert_filename(prov->module, prov->name);
901 if (module_path != NULL)
902 merged_path = DSO_merge(prov->module, module_path, load_dir);
904 if (merged_path == NULL
905 || (DSO_load(prov->module, merged_path, NULL, 0)) == NULL) {
906 DSO_free(prov->module);
910 OPENSSL_free(merged_path);
911 OPENSSL_free(allocated_path);
912 OPENSSL_free(allocated_load_dir);
915 if (prov->module == NULL) {
916 /* DSO has already recorded errors, this is just a tracepoint */
917 ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_DSO_LIB,
918 "name=%s", prov->name);
922 prov->init_function = (OSSL_provider_init_fn *)
923 DSO_bind_func(prov->module, "OSSL_provider_init");
927 /* Check for and call the initialise function for the provider. */
928 if (prov->init_function == NULL) {
929 ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_UNSUPPORTED,
930 "name=%s, provider has no provider init function",
935 if (!prov->init_function((OSSL_CORE_HANDLE *)prov, core_dispatch,
936 &provider_dispatch, &tmp_provctx)) {
937 ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_INIT_FAIL,
938 "name=%s", prov->name);
941 prov->provctx = tmp_provctx;
942 prov->dispatch = provider_dispatch;
944 for (; provider_dispatch->function_id != 0; provider_dispatch++) {
945 switch (provider_dispatch->function_id) {
946 case OSSL_FUNC_PROVIDER_TEARDOWN:
948 OSSL_FUNC_provider_teardown(provider_dispatch);
950 case OSSL_FUNC_PROVIDER_GETTABLE_PARAMS:
951 prov->gettable_params =
952 OSSL_FUNC_provider_gettable_params(provider_dispatch);
954 case OSSL_FUNC_PROVIDER_GET_PARAMS:
956 OSSL_FUNC_provider_get_params(provider_dispatch);
958 case OSSL_FUNC_PROVIDER_SELF_TEST:
960 OSSL_FUNC_provider_self_test(provider_dispatch);
962 case OSSL_FUNC_PROVIDER_GET_CAPABILITIES:
963 prov->get_capabilities =
964 OSSL_FUNC_provider_get_capabilities(provider_dispatch);
966 case OSSL_FUNC_PROVIDER_QUERY_OPERATION:
967 prov->query_operation =
968 OSSL_FUNC_provider_query_operation(provider_dispatch);
970 case OSSL_FUNC_PROVIDER_UNQUERY_OPERATION:
971 prov->unquery_operation =
972 OSSL_FUNC_provider_unquery_operation(provider_dispatch);
974 #ifndef OPENSSL_NO_ERR
976 case OSSL_FUNC_PROVIDER_GET_REASON_STRINGS:
977 p_get_reason_strings =
978 OSSL_FUNC_provider_get_reason_strings(provider_dispatch);
985 #ifndef OPENSSL_NO_ERR
987 if (p_get_reason_strings != NULL) {
988 const OSSL_ITEM *reasonstrings = p_get_reason_strings(prov->provctx);
992 * ERR_load_strings() handles ERR_STRING_DATA rather than OSSL_ITEM,
993 * although they are essentially the same type.
994 * Furthermore, ERR_load_strings() patches the array's error number
995 * with the error library number, so we need to make a copy of that
999 while (reasonstrings[cnt].id != 0) {
1000 if (ERR_GET_LIB(reasonstrings[cnt].id) != 0)
1004 cnt++; /* One for the terminating item */
1006 /* Allocate one extra item for the "library" name */
1007 prov->error_strings =
1008 OPENSSL_zalloc(sizeof(ERR_STRING_DATA) * (cnt + 1));
1009 if (prov->error_strings == NULL)
1013 * Set the "library" name.
1015 prov->error_strings[0].error = ERR_PACK(prov->error_lib, 0, 0);
1016 prov->error_strings[0].string = prov->name;
1018 * Copy reasonstrings item 0..cnt-1 to prov->error_trings positions
1021 for (cnt2 = 1; cnt2 <= cnt; cnt2++) {
1022 prov->error_strings[cnt2].error = (int)reasonstrings[cnt2-1].id;
1023 prov->error_strings[cnt2].string = reasonstrings[cnt2-1].ptr;
1026 ERR_load_strings(prov->error_lib, prov->error_strings);
1031 /* With this flag set, this provider has become fully "loaded". */
1032 prov->flag_initialized = 1;
1040 * Deactivate a provider. If upcalls is 0 then we suppress any upcalls to a
1041 * parent provider. If removechildren is 0 then we suppress any calls to remove
1043 * Return -1 on failure and the activation count on success
1045 static int provider_deactivate(OSSL_PROVIDER *prov, int upcalls,
1049 struct provider_store_st *store;
1055 if (!ossl_assert(prov != NULL))
1059 * No need to lock if we've got no store because we've not been shared with
1062 store = get_provider_store(prov->libctx);
1066 if (lock && !CRYPTO_THREAD_read_lock(store->lock))
1068 if (lock && !CRYPTO_THREAD_write_lock(prov->flag_lock)) {
1069 CRYPTO_THREAD_unlock(store->lock);
1074 if (prov->activatecnt >= 2 && prov->ischild && upcalls) {
1076 * We have had a direct activation in this child libctx so we need to
1077 * now down the ref count in the parent provider. We do the actual down
1078 * ref outside of the flag_lock, since it could involve getting other
1085 if ((count = --prov->activatecnt) < 1)
1086 prov->flag_activated = 0;
1093 if (removechildren && store != NULL) {
1094 int i, max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1095 OSSL_PROVIDER_CHILD_CB *child_cb;
1097 for (i = 0; i < max; i++) {
1098 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1099 child_cb->remove_cb((OSSL_CORE_HANDLE *)prov, child_cb->cbdata);
1104 CRYPTO_THREAD_unlock(prov->flag_lock);
1105 CRYPTO_THREAD_unlock(store->lock);
1109 ossl_provider_free_parent(prov, 1);
1112 /* We don't deinit here, that's done in ossl_provider_free() */
1117 * Activate a provider.
1118 * Return -1 on failure and the activation count on success
1120 static int provider_activate(OSSL_PROVIDER *prov, int lock, int upcalls)
1123 struct provider_store_st *store;
1126 store = prov->store;
1128 * If the provider hasn't been added to the store, then we don't need
1129 * any locks because we've not shared it with other threads.
1131 if (store == NULL) {
1133 if (!provider_init(prov))
1138 if (prov->ischild && upcalls && !ossl_provider_up_ref_parent(prov, 1))
1142 if (lock && !CRYPTO_THREAD_read_lock(store->lock)) {
1144 if (prov->ischild && upcalls)
1145 ossl_provider_free_parent(prov, 1);
1150 if (lock && !CRYPTO_THREAD_write_lock(prov->flag_lock)) {
1151 CRYPTO_THREAD_unlock(store->lock);
1153 if (prov->ischild && upcalls)
1154 ossl_provider_free_parent(prov, 1);
1159 count = ++prov->activatecnt;
1160 prov->flag_activated = 1;
1162 if (prov->activatecnt == 1 && store != NULL) {
1163 ret = create_provider_children(prov);
1166 CRYPTO_THREAD_unlock(prov->flag_lock);
1167 CRYPTO_THREAD_unlock(store->lock);
1176 static int provider_flush_store_cache(const OSSL_PROVIDER *prov)
1178 struct provider_store_st *store;
1181 if ((store = get_provider_store(prov->libctx)) == NULL)
1184 if (!CRYPTO_THREAD_read_lock(store->lock))
1186 freeing = store->freeing;
1187 CRYPTO_THREAD_unlock(store->lock);
1191 = evp_method_store_cache_flush(prov->libctx)
1193 + ossl_encoder_store_cache_flush(prov->libctx)
1194 + ossl_decoder_store_cache_flush(prov->libctx)
1195 + ossl_store_loader_store_cache_flush(prov->libctx)
1208 static int provider_remove_store_methods(OSSL_PROVIDER *prov)
1210 struct provider_store_st *store;
1213 if ((store = get_provider_store(prov->libctx)) == NULL)
1216 if (!CRYPTO_THREAD_read_lock(store->lock))
1218 freeing = store->freeing;
1219 CRYPTO_THREAD_unlock(store->lock);
1224 if (!CRYPTO_THREAD_write_lock(prov->opbits_lock))
1226 OPENSSL_free(prov->operation_bits);
1227 prov->operation_bits = NULL;
1228 prov->operation_bits_sz = 0;
1229 CRYPTO_THREAD_unlock(prov->opbits_lock);
1231 acc = evp_method_store_remove_all_provided(prov)
1233 + ossl_encoder_store_remove_all_provided(prov)
1234 + ossl_decoder_store_remove_all_provided(prov)
1235 + ossl_store_loader_store_remove_all_provided(prov)
1248 int ossl_provider_activate(OSSL_PROVIDER *prov, int upcalls, int aschild)
1256 * If aschild is true, then we only actually do the activation if the
1257 * provider is a child. If its not, this is still success.
1259 if (aschild && !prov->ischild)
1262 if ((count = provider_activate(prov, 1, upcalls)) > 0)
1263 return count == 1 ? provider_flush_store_cache(prov) : 1;
1268 int ossl_provider_deactivate(OSSL_PROVIDER *prov, int removechildren)
1273 || (count = provider_deactivate(prov, 1, removechildren)) < 0)
1275 return count == 0 ? provider_remove_store_methods(prov) : 1;
1278 void *ossl_provider_ctx(const OSSL_PROVIDER *prov)
1280 return prov != NULL ? prov->provctx : NULL;
1284 * This function only does something once when store->use_fallbacks == 1,
1285 * and then sets store->use_fallbacks = 0, so the second call and so on is
1286 * effectively a no-op.
1288 static int provider_activate_fallbacks(struct provider_store_st *store)
1291 int activated_fallback_count = 0;
1293 const OSSL_PROVIDER_INFO *p;
1295 if (!CRYPTO_THREAD_read_lock(store->lock))
1297 use_fallbacks = store->use_fallbacks;
1298 CRYPTO_THREAD_unlock(store->lock);
1302 if (!CRYPTO_THREAD_write_lock(store->lock))
1304 /* Check again, just in case another thread changed it */
1305 use_fallbacks = store->use_fallbacks;
1306 if (!use_fallbacks) {
1307 CRYPTO_THREAD_unlock(store->lock);
1311 for (p = ossl_predefined_providers; p->name != NULL; p++) {
1312 OSSL_PROVIDER *prov = NULL;
1314 if (!p->is_fallback)
1317 * We use the internal constructor directly here,
1318 * otherwise we get a call loop
1320 prov = provider_new(p->name, p->init, NULL);
1323 prov->libctx = store->libctx;
1325 prov->error_lib = ERR_get_next_error_library();
1329 * We are calling provider_activate while holding the store lock. This
1330 * means the init function will be called while holding a lock. Normally
1331 * we try to avoid calling a user callback while holding a lock.
1332 * However, fallbacks are never third party providers so we accept this.
1334 if (provider_activate(prov, 0, 0) < 0) {
1335 ossl_provider_free(prov);
1338 prov->store = store;
1339 if (sk_OSSL_PROVIDER_push(store->providers, prov) == 0) {
1340 ossl_provider_free(prov);
1343 activated_fallback_count++;
1346 if (activated_fallback_count > 0) {
1347 store->use_fallbacks = 0;
1351 CRYPTO_THREAD_unlock(store->lock);
1355 int ossl_provider_doall_activated(OSSL_LIB_CTX *ctx,
1356 int (*cb)(OSSL_PROVIDER *provider,
1360 int ret = 0, curr, max, ref = 0;
1361 struct provider_store_st *store = get_provider_store(ctx);
1362 STACK_OF(OSSL_PROVIDER) *provs = NULL;
1366 * Make sure any providers are loaded from config before we try to use
1369 if (ossl_lib_ctx_is_default(ctx))
1370 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
1375 if (!provider_activate_fallbacks(store))
1379 * Under lock, grab a copy of the provider list and up_ref each
1380 * provider so that they don't disappear underneath us.
1382 if (!CRYPTO_THREAD_read_lock(store->lock))
1384 provs = sk_OSSL_PROVIDER_dup(store->providers);
1385 if (provs == NULL) {
1386 CRYPTO_THREAD_unlock(store->lock);
1389 max = sk_OSSL_PROVIDER_num(provs);
1391 * We work backwards through the stack so that we can safely delete items
1394 for (curr = max - 1; curr >= 0; curr--) {
1395 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1397 if (!CRYPTO_THREAD_write_lock(prov->flag_lock))
1399 if (prov->flag_activated) {
1401 * We call CRYPTO_UP_REF directly rather than ossl_provider_up_ref
1402 * to avoid upping the ref count on the parent provider, which we
1403 * must not do while holding locks.
1405 if (CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock) <= 0) {
1406 CRYPTO_THREAD_unlock(prov->flag_lock);
1410 * It's already activated, but we up the activated count to ensure
1411 * it remains activated until after we've called the user callback.
1412 * We do this with no locking (because we already hold the locks)
1413 * and no upcalls (which must not be called when locks are held). In
1414 * theory this could mean the parent provider goes inactive, whilst
1415 * still activated in the child for a short period. That's ok.
1417 if (provider_activate(prov, 0, 0) < 0) {
1418 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
1419 CRYPTO_THREAD_unlock(prov->flag_lock);
1423 sk_OSSL_PROVIDER_delete(provs, curr);
1426 CRYPTO_THREAD_unlock(prov->flag_lock);
1428 CRYPTO_THREAD_unlock(store->lock);
1431 * Now, we sweep through all providers not under lock
1433 for (curr = 0; curr < max; curr++) {
1434 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1436 if (!cb(prov, cbdata)) {
1447 CRYPTO_THREAD_unlock(store->lock);
1450 * The pop_free call doesn't do what we want on an error condition. We
1451 * either start from the first item in the stack, or part way through if
1452 * we only processed some of the items.
1454 for (curr++; curr < max; curr++) {
1455 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1457 provider_deactivate(prov, 0, 1);
1459 * As above where we did the up-ref, we don't call ossl_provider_free
1460 * to avoid making upcalls. There should always be at least one ref
1461 * to the provider in the store, so this should never drop to 0.
1463 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
1465 * Not much we can do if this assert ever fails. So we don't use
1470 sk_OSSL_PROVIDER_free(provs);
1474 int OSSL_PROVIDER_available(OSSL_LIB_CTX *libctx, const char *name)
1476 OSSL_PROVIDER *prov = NULL;
1478 struct provider_store_st *store = get_provider_store(libctx);
1480 if (store == NULL || !provider_activate_fallbacks(store))
1483 prov = ossl_provider_find(libctx, name, 0);
1485 if (!CRYPTO_THREAD_read_lock(prov->flag_lock))
1487 available = prov->flag_activated;
1488 CRYPTO_THREAD_unlock(prov->flag_lock);
1489 ossl_provider_free(prov);
1494 /* Getters of Provider Object data */
1495 const char *ossl_provider_name(const OSSL_PROVIDER *prov)
1500 const DSO *ossl_provider_dso(const OSSL_PROVIDER *prov)
1502 return prov->module;
1505 const char *ossl_provider_module_name(const OSSL_PROVIDER *prov)
1510 return DSO_get_filename(prov->module);
1514 const char *ossl_provider_module_path(const OSSL_PROVIDER *prov)
1519 /* FIXME: Ensure it's a full path */
1520 return DSO_get_filename(prov->module);
1524 void *ossl_provider_prov_ctx(const OSSL_PROVIDER *prov)
1527 return prov->provctx;
1532 const OSSL_DISPATCH *ossl_provider_get0_dispatch(const OSSL_PROVIDER *prov)
1535 return prov->dispatch;
1540 OSSL_LIB_CTX *ossl_provider_libctx(const OSSL_PROVIDER *prov)
1542 return prov != NULL ? prov->libctx : NULL;
1545 /* Wrappers around calls to the provider */
1546 void ossl_provider_teardown(const OSSL_PROVIDER *prov)
1548 if (prov->teardown != NULL
1553 prov->teardown(prov->provctx);
1556 const OSSL_PARAM *ossl_provider_gettable_params(const OSSL_PROVIDER *prov)
1558 return prov->gettable_params == NULL
1559 ? NULL : prov->gettable_params(prov->provctx);
1562 int ossl_provider_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
1564 return prov->get_params == NULL
1565 ? 0 : prov->get_params(prov->provctx, params);
1568 int ossl_provider_self_test(const OSSL_PROVIDER *prov)
1572 if (prov->self_test == NULL)
1574 ret = prov->self_test(prov->provctx);
1576 (void)provider_remove_store_methods((OSSL_PROVIDER *)prov);
1580 int ossl_provider_get_capabilities(const OSSL_PROVIDER *prov,
1581 const char *capability,
1585 return prov->get_capabilities == NULL
1586 ? 1 : prov->get_capabilities(prov->provctx, capability, cb, arg);
1589 const OSSL_ALGORITHM *ossl_provider_query_operation(const OSSL_PROVIDER *prov,
1593 const OSSL_ALGORITHM *res;
1595 if (prov->query_operation == NULL)
1597 res = prov->query_operation(prov->provctx, operation_id, no_cache);
1598 #if defined(OPENSSL_NO_CACHED_FETCH)
1599 /* Forcing the non-caching of queries */
1600 if (no_cache != NULL)
1606 void ossl_provider_unquery_operation(const OSSL_PROVIDER *prov,
1608 const OSSL_ALGORITHM *algs)
1610 if (prov->unquery_operation != NULL)
1611 prov->unquery_operation(prov->provctx, operation_id, algs);
1614 int ossl_provider_set_operation_bit(OSSL_PROVIDER *provider, size_t bitnum)
1616 size_t byte = bitnum / 8;
1617 unsigned char bit = (1 << (bitnum % 8)) & 0xFF;
1619 if (!CRYPTO_THREAD_write_lock(provider->opbits_lock))
1621 if (provider->operation_bits_sz <= byte) {
1622 unsigned char *tmp = OPENSSL_realloc(provider->operation_bits,
1626 CRYPTO_THREAD_unlock(provider->opbits_lock);
1629 provider->operation_bits = tmp;
1630 memset(provider->operation_bits + provider->operation_bits_sz,
1631 '\0', byte + 1 - provider->operation_bits_sz);
1632 provider->operation_bits_sz = byte + 1;
1634 provider->operation_bits[byte] |= bit;
1635 CRYPTO_THREAD_unlock(provider->opbits_lock);
1639 int ossl_provider_test_operation_bit(OSSL_PROVIDER *provider, size_t bitnum,
1642 size_t byte = bitnum / 8;
1643 unsigned char bit = (1 << (bitnum % 8)) & 0xFF;
1645 if (!ossl_assert(result != NULL)) {
1646 ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
1651 if (!CRYPTO_THREAD_read_lock(provider->opbits_lock))
1653 if (provider->operation_bits_sz > byte)
1654 *result = ((provider->operation_bits[byte] & bit) != 0);
1655 CRYPTO_THREAD_unlock(provider->opbits_lock);
1660 const OSSL_CORE_HANDLE *ossl_provider_get_parent(OSSL_PROVIDER *prov)
1662 return prov->handle;
1665 int ossl_provider_is_child(const OSSL_PROVIDER *prov)
1667 return prov->ischild;
1670 int ossl_provider_set_child(OSSL_PROVIDER *prov, const OSSL_CORE_HANDLE *handle)
1672 prov->handle = handle;
1678 int ossl_provider_default_props_update(OSSL_LIB_CTX *libctx, const char *props)
1681 struct provider_store_st *store = NULL;
1683 OSSL_PROVIDER_CHILD_CB *child_cb;
1685 if ((store = get_provider_store(libctx)) == NULL)
1688 if (!CRYPTO_THREAD_read_lock(store->lock))
1691 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1692 for (i = 0; i < max; i++) {
1693 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1694 child_cb->global_props_cb(props, child_cb->cbdata);
1697 CRYPTO_THREAD_unlock(store->lock);
1702 static int ossl_provider_register_child_cb(const OSSL_CORE_HANDLE *handle,
1704 const OSSL_CORE_HANDLE *provider,
1707 const OSSL_CORE_HANDLE *provider,
1709 int (*global_props_cb)(
1715 * This is really an OSSL_PROVIDER that we created and cast to
1716 * OSSL_CORE_HANDLE originally. Therefore it is safe to cast it back.
1718 OSSL_PROVIDER *thisprov = (OSSL_PROVIDER *)handle;
1719 OSSL_PROVIDER *prov;
1720 OSSL_LIB_CTX *libctx = thisprov->libctx;
1721 struct provider_store_st *store = NULL;
1722 int ret = 0, i, max;
1723 OSSL_PROVIDER_CHILD_CB *child_cb;
1724 char *propsstr = NULL;
1726 if ((store = get_provider_store(libctx)) == NULL)
1729 child_cb = OPENSSL_malloc(sizeof(*child_cb));
1730 if (child_cb == NULL)
1732 child_cb->prov = thisprov;
1733 child_cb->create_cb = create_cb;
1734 child_cb->remove_cb = remove_cb;
1735 child_cb->global_props_cb = global_props_cb;
1736 child_cb->cbdata = cbdata;
1738 if (!CRYPTO_THREAD_write_lock(store->lock)) {
1739 OPENSSL_free(child_cb);
1742 propsstr = evp_get_global_properties_str(libctx, 0);
1744 if (propsstr != NULL) {
1745 global_props_cb(propsstr, cbdata);
1746 OPENSSL_free(propsstr);
1748 max = sk_OSSL_PROVIDER_num(store->providers);
1749 for (i = 0; i < max; i++) {
1752 prov = sk_OSSL_PROVIDER_value(store->providers, i);
1754 if (!CRYPTO_THREAD_read_lock(prov->flag_lock))
1756 activated = prov->flag_activated;
1757 CRYPTO_THREAD_unlock(prov->flag_lock);
1759 * We hold the store lock while calling the user callback. This means
1760 * that the user callback must be short and simple and not do anything
1761 * likely to cause a deadlock. We don't hold the flag_lock during this
1762 * call. In theory this means that another thread could deactivate it
1763 * while we are calling create. This is ok because the other thread
1764 * will also call remove_cb, but won't be able to do so until we release
1767 if (activated && !create_cb((OSSL_CORE_HANDLE *)prov, cbdata))
1772 ret = sk_OSSL_PROVIDER_CHILD_CB_push(store->child_cbs, child_cb);
1774 if (i != max || ret <= 0) {
1775 /* Failed during creation. Remove everything we just added */
1776 for (; i >= 0; i--) {
1777 prov = sk_OSSL_PROVIDER_value(store->providers, i);
1778 remove_cb((OSSL_CORE_HANDLE *)prov, cbdata);
1780 OPENSSL_free(child_cb);
1783 CRYPTO_THREAD_unlock(store->lock);
1788 static void ossl_provider_deregister_child_cb(const OSSL_CORE_HANDLE *handle)
1791 * This is really an OSSL_PROVIDER that we created and cast to
1792 * OSSL_CORE_HANDLE originally. Therefore it is safe to cast it back.
1794 OSSL_PROVIDER *thisprov = (OSSL_PROVIDER *)handle;
1795 OSSL_LIB_CTX *libctx = thisprov->libctx;
1796 struct provider_store_st *store = NULL;
1798 OSSL_PROVIDER_CHILD_CB *child_cb;
1800 if ((store = get_provider_store(libctx)) == NULL)
1803 if (!CRYPTO_THREAD_write_lock(store->lock))
1805 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1806 for (i = 0; i < max; i++) {
1807 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1808 if (child_cb->prov == thisprov) {
1809 /* Found an entry */
1810 sk_OSSL_PROVIDER_CHILD_CB_delete(store->child_cbs, i);
1811 OPENSSL_free(child_cb);
1815 CRYPTO_THREAD_unlock(store->lock);
1820 * Core functions for the provider
1821 * ===============================
1823 * This is the set of functions that the core makes available to the provider
1827 * This returns a list of Provider Object parameters with their types, for
1828 * discovery. We do not expect that many providers will use this, but one
1831 static const OSSL_PARAM param_types[] = {
1832 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_VERSION, OSSL_PARAM_UTF8_PTR, NULL, 0),
1833 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_PROV_NAME, OSSL_PARAM_UTF8_PTR,
1836 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_MODULE_FILENAME, OSSL_PARAM_UTF8_PTR,
1843 * Forward declare all the functions that are provided aa dispatch.
1844 * This ensures that the compiler will complain if they aren't defined
1845 * with the correct signature.
1847 static OSSL_FUNC_core_gettable_params_fn core_gettable_params;
1848 static OSSL_FUNC_core_get_params_fn core_get_params;
1849 static OSSL_FUNC_core_get_libctx_fn core_get_libctx;
1850 static OSSL_FUNC_core_thread_start_fn core_thread_start;
1852 static OSSL_FUNC_core_new_error_fn core_new_error;
1853 static OSSL_FUNC_core_set_error_debug_fn core_set_error_debug;
1854 static OSSL_FUNC_core_vset_error_fn core_vset_error;
1855 static OSSL_FUNC_core_set_error_mark_fn core_set_error_mark;
1856 static OSSL_FUNC_core_clear_last_error_mark_fn core_clear_last_error_mark;
1857 static OSSL_FUNC_core_pop_error_to_mark_fn core_pop_error_to_mark;
1858 OSSL_FUNC_BIO_new_file_fn ossl_core_bio_new_file;
1859 OSSL_FUNC_BIO_new_membuf_fn ossl_core_bio_new_mem_buf;
1860 OSSL_FUNC_BIO_read_ex_fn ossl_core_bio_read_ex;
1861 OSSL_FUNC_BIO_write_ex_fn ossl_core_bio_write_ex;
1862 OSSL_FUNC_BIO_gets_fn ossl_core_bio_gets;
1863 OSSL_FUNC_BIO_puts_fn ossl_core_bio_puts;
1864 OSSL_FUNC_BIO_up_ref_fn ossl_core_bio_up_ref;
1865 OSSL_FUNC_BIO_free_fn ossl_core_bio_free;
1866 OSSL_FUNC_BIO_vprintf_fn ossl_core_bio_vprintf;
1867 OSSL_FUNC_BIO_vsnprintf_fn BIO_vsnprintf;
1868 static OSSL_FUNC_self_test_cb_fn core_self_test_get_callback;
1869 OSSL_FUNC_get_entropy_fn ossl_rand_get_entropy;
1870 OSSL_FUNC_cleanup_entropy_fn ossl_rand_cleanup_entropy;
1871 OSSL_FUNC_get_nonce_fn ossl_rand_get_nonce;
1872 OSSL_FUNC_cleanup_nonce_fn ossl_rand_cleanup_nonce;
1874 OSSL_FUNC_CRYPTO_malloc_fn CRYPTO_malloc;
1875 OSSL_FUNC_CRYPTO_zalloc_fn CRYPTO_zalloc;
1876 OSSL_FUNC_CRYPTO_free_fn CRYPTO_free;
1877 OSSL_FUNC_CRYPTO_clear_free_fn CRYPTO_clear_free;
1878 OSSL_FUNC_CRYPTO_realloc_fn CRYPTO_realloc;
1879 OSSL_FUNC_CRYPTO_clear_realloc_fn CRYPTO_clear_realloc;
1880 OSSL_FUNC_CRYPTO_secure_malloc_fn CRYPTO_secure_malloc;
1881 OSSL_FUNC_CRYPTO_secure_zalloc_fn CRYPTO_secure_zalloc;
1882 OSSL_FUNC_CRYPTO_secure_free_fn CRYPTO_secure_free;
1883 OSSL_FUNC_CRYPTO_secure_clear_free_fn CRYPTO_secure_clear_free;
1884 OSSL_FUNC_CRYPTO_secure_allocated_fn CRYPTO_secure_allocated;
1885 OSSL_FUNC_OPENSSL_cleanse_fn OPENSSL_cleanse;
1887 OSSL_FUNC_provider_register_child_cb_fn ossl_provider_register_child_cb;
1888 OSSL_FUNC_provider_deregister_child_cb_fn ossl_provider_deregister_child_cb;
1889 static OSSL_FUNC_provider_name_fn core_provider_get0_name;
1890 static OSSL_FUNC_provider_get0_provider_ctx_fn core_provider_get0_provider_ctx;
1891 static OSSL_FUNC_provider_get0_dispatch_fn core_provider_get0_dispatch;
1892 static OSSL_FUNC_provider_up_ref_fn core_provider_up_ref_intern;
1893 static OSSL_FUNC_provider_free_fn core_provider_free_intern;
1894 static OSSL_FUNC_core_obj_add_sigid_fn core_obj_add_sigid;
1895 static OSSL_FUNC_core_obj_create_fn core_obj_create;
1898 static const OSSL_PARAM *core_gettable_params(const OSSL_CORE_HANDLE *handle)
1903 static int core_get_params(const OSSL_CORE_HANDLE *handle, OSSL_PARAM params[])
1908 * We created this object originally and we know it is actually an
1909 * OSSL_PROVIDER *, so the cast is safe
1911 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1913 if ((p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_CORE_VERSION)) != NULL)
1914 OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR);
1915 if ((p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_CORE_PROV_NAME)) != NULL)
1916 OSSL_PARAM_set_utf8_ptr(p, prov->name);
1919 if ((p = OSSL_PARAM_locate(params,
1920 OSSL_PROV_PARAM_CORE_MODULE_FILENAME)) != NULL)
1921 OSSL_PARAM_set_utf8_ptr(p, ossl_provider_module_path(prov));
1924 if (prov->parameters == NULL)
1927 for (i = 0; i < sk_INFOPAIR_num(prov->parameters); i++) {
1928 INFOPAIR *pair = sk_INFOPAIR_value(prov->parameters, i);
1930 if ((p = OSSL_PARAM_locate(params, pair->name)) != NULL)
1931 OSSL_PARAM_set_utf8_ptr(p, pair->value);
1936 static OPENSSL_CORE_CTX *core_get_libctx(const OSSL_CORE_HANDLE *handle)
1939 * We created this object originally and we know it is actually an
1940 * OSSL_PROVIDER *, so the cast is safe
1942 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1945 * Using ossl_provider_libctx would be wrong as that returns
1946 * NULL for |prov| == NULL and NULL libctx has a special meaning
1947 * that does not apply here. Here |prov| == NULL can happen only in
1948 * case of a coding error.
1950 assert(prov != NULL);
1951 return (OPENSSL_CORE_CTX *)prov->libctx;
1954 static int core_thread_start(const OSSL_CORE_HANDLE *handle,
1955 OSSL_thread_stop_handler_fn handfn,
1959 * We created this object originally and we know it is actually an
1960 * OSSL_PROVIDER *, so the cast is safe
1962 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1964 return ossl_init_thread_start(prov, arg, handfn);
1968 * The FIPS module inner provider doesn't implement these. They aren't
1969 * needed there, since the FIPS module upcalls are always the outer provider
1974 * These error functions should use |handle| to select the proper
1975 * library context to report in the correct error stack if error
1976 * stacks become tied to the library context.
1977 * We cannot currently do that since there's no support for it in the
1980 static void core_new_error(const OSSL_CORE_HANDLE *handle)
1985 static void core_set_error_debug(const OSSL_CORE_HANDLE *handle,
1986 const char *file, int line, const char *func)
1988 ERR_set_debug(file, line, func);
1991 static void core_vset_error(const OSSL_CORE_HANDLE *handle,
1992 uint32_t reason, const char *fmt, va_list args)
1995 * We created this object originally and we know it is actually an
1996 * OSSL_PROVIDER *, so the cast is safe
1998 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
2001 * If the uppermost 8 bits are non-zero, it's an OpenSSL library
2002 * error and will be treated as such. Otherwise, it's a new style
2003 * provider error and will be treated as such.
2005 if (ERR_GET_LIB(reason) != 0) {
2006 ERR_vset_error(ERR_GET_LIB(reason), ERR_GET_REASON(reason), fmt, args);
2008 ERR_vset_error(prov->error_lib, (int)reason, fmt, args);
2012 static int core_set_error_mark(const OSSL_CORE_HANDLE *handle)
2014 return ERR_set_mark();
2017 static int core_clear_last_error_mark(const OSSL_CORE_HANDLE *handle)
2019 return ERR_clear_last_mark();
2022 static int core_pop_error_to_mark(const OSSL_CORE_HANDLE *handle)
2024 return ERR_pop_to_mark();
2027 static void core_self_test_get_callback(OPENSSL_CORE_CTX *libctx,
2028 OSSL_CALLBACK **cb, void **cbarg)
2030 OSSL_SELF_TEST_get_callback((OSSL_LIB_CTX *)libctx, cb, cbarg);
2033 static const char *core_provider_get0_name(const OSSL_CORE_HANDLE *prov)
2035 return OSSL_PROVIDER_get0_name((const OSSL_PROVIDER *)prov);
2038 static void *core_provider_get0_provider_ctx(const OSSL_CORE_HANDLE *prov)
2040 return OSSL_PROVIDER_get0_provider_ctx((const OSSL_PROVIDER *)prov);
2043 static const OSSL_DISPATCH *
2044 core_provider_get0_dispatch(const OSSL_CORE_HANDLE *prov)
2046 return OSSL_PROVIDER_get0_dispatch((const OSSL_PROVIDER *)prov);
2049 static int core_provider_up_ref_intern(const OSSL_CORE_HANDLE *prov,
2052 return provider_up_ref_intern((OSSL_PROVIDER *)prov, activate);
2055 static int core_provider_free_intern(const OSSL_CORE_HANDLE *prov,
2058 return provider_free_intern((OSSL_PROVIDER *)prov, deactivate);
2061 static int core_obj_add_sigid(const OSSL_CORE_HANDLE *prov,
2062 const char *sign_name, const char *digest_name,
2063 const char *pkey_name)
2065 int sign_nid = OBJ_txt2nid(sign_name);
2066 int digest_nid = NID_undef;
2067 int pkey_nid = OBJ_txt2nid(pkey_name);
2069 if (digest_name != NULL && digest_name[0] != '\0'
2070 && (digest_nid = OBJ_txt2nid(digest_name)) == NID_undef)
2073 if (sign_nid == NID_undef)
2077 * Check if it already exists. This is a success if so (even if we don't
2078 * have nids for the digest/pkey)
2080 if (OBJ_find_sigid_algs(sign_nid, NULL, NULL))
2083 if (pkey_nid == NID_undef)
2086 return OBJ_add_sigid(sign_nid, digest_nid, pkey_nid);
2089 static int core_obj_create(const OSSL_CORE_HANDLE *prov, const char *oid,
2090 const char *sn, const char *ln)
2092 /* Check if it already exists and create it if not */
2093 return OBJ_txt2nid(oid) != NID_undef
2094 || OBJ_create(oid, sn, ln) != NID_undef;
2096 #endif /* FIPS_MODULE */
2099 * Functions provided by the core.
2101 static const OSSL_DISPATCH core_dispatch_[] = {
2102 { OSSL_FUNC_CORE_GETTABLE_PARAMS, (void (*)(void))core_gettable_params },
2103 { OSSL_FUNC_CORE_GET_PARAMS, (void (*)(void))core_get_params },
2104 { OSSL_FUNC_CORE_GET_LIBCTX, (void (*)(void))core_get_libctx },
2105 { OSSL_FUNC_CORE_THREAD_START, (void (*)(void))core_thread_start },
2107 { OSSL_FUNC_CORE_NEW_ERROR, (void (*)(void))core_new_error },
2108 { OSSL_FUNC_CORE_SET_ERROR_DEBUG, (void (*)(void))core_set_error_debug },
2109 { OSSL_FUNC_CORE_VSET_ERROR, (void (*)(void))core_vset_error },
2110 { OSSL_FUNC_CORE_SET_ERROR_MARK, (void (*)(void))core_set_error_mark },
2111 { OSSL_FUNC_CORE_CLEAR_LAST_ERROR_MARK,
2112 (void (*)(void))core_clear_last_error_mark },
2113 { OSSL_FUNC_CORE_POP_ERROR_TO_MARK, (void (*)(void))core_pop_error_to_mark },
2114 { OSSL_FUNC_BIO_NEW_FILE, (void (*)(void))ossl_core_bio_new_file },
2115 { OSSL_FUNC_BIO_NEW_MEMBUF, (void (*)(void))ossl_core_bio_new_mem_buf },
2116 { OSSL_FUNC_BIO_READ_EX, (void (*)(void))ossl_core_bio_read_ex },
2117 { OSSL_FUNC_BIO_WRITE_EX, (void (*)(void))ossl_core_bio_write_ex },
2118 { OSSL_FUNC_BIO_GETS, (void (*)(void))ossl_core_bio_gets },
2119 { OSSL_FUNC_BIO_PUTS, (void (*)(void))ossl_core_bio_puts },
2120 { OSSL_FUNC_BIO_CTRL, (void (*)(void))ossl_core_bio_ctrl },
2121 { OSSL_FUNC_BIO_UP_REF, (void (*)(void))ossl_core_bio_up_ref },
2122 { OSSL_FUNC_BIO_FREE, (void (*)(void))ossl_core_bio_free },
2123 { OSSL_FUNC_BIO_VPRINTF, (void (*)(void))ossl_core_bio_vprintf },
2124 { OSSL_FUNC_BIO_VSNPRINTF, (void (*)(void))BIO_vsnprintf },
2125 { OSSL_FUNC_SELF_TEST_CB, (void (*)(void))core_self_test_get_callback },
2126 { OSSL_FUNC_GET_ENTROPY, (void (*)(void))ossl_rand_get_entropy },
2127 { OSSL_FUNC_CLEANUP_ENTROPY, (void (*)(void))ossl_rand_cleanup_entropy },
2128 { OSSL_FUNC_GET_NONCE, (void (*)(void))ossl_rand_get_nonce },
2129 { OSSL_FUNC_CLEANUP_NONCE, (void (*)(void))ossl_rand_cleanup_nonce },
2131 { OSSL_FUNC_CRYPTO_MALLOC, (void (*)(void))CRYPTO_malloc },
2132 { OSSL_FUNC_CRYPTO_ZALLOC, (void (*)(void))CRYPTO_zalloc },
2133 { OSSL_FUNC_CRYPTO_FREE, (void (*)(void))CRYPTO_free },
2134 { OSSL_FUNC_CRYPTO_CLEAR_FREE, (void (*)(void))CRYPTO_clear_free },
2135 { OSSL_FUNC_CRYPTO_REALLOC, (void (*)(void))CRYPTO_realloc },
2136 { OSSL_FUNC_CRYPTO_CLEAR_REALLOC, (void (*)(void))CRYPTO_clear_realloc },
2137 { OSSL_FUNC_CRYPTO_SECURE_MALLOC, (void (*)(void))CRYPTO_secure_malloc },
2138 { OSSL_FUNC_CRYPTO_SECURE_ZALLOC, (void (*)(void))CRYPTO_secure_zalloc },
2139 { OSSL_FUNC_CRYPTO_SECURE_FREE, (void (*)(void))CRYPTO_secure_free },
2140 { OSSL_FUNC_CRYPTO_SECURE_CLEAR_FREE,
2141 (void (*)(void))CRYPTO_secure_clear_free },
2142 { OSSL_FUNC_CRYPTO_SECURE_ALLOCATED,
2143 (void (*)(void))CRYPTO_secure_allocated },
2144 { OSSL_FUNC_OPENSSL_CLEANSE, (void (*)(void))OPENSSL_cleanse },
2146 { OSSL_FUNC_PROVIDER_REGISTER_CHILD_CB,
2147 (void (*)(void))ossl_provider_register_child_cb },
2148 { OSSL_FUNC_PROVIDER_DEREGISTER_CHILD_CB,
2149 (void (*)(void))ossl_provider_deregister_child_cb },
2150 { OSSL_FUNC_PROVIDER_NAME,
2151 (void (*)(void))core_provider_get0_name },
2152 { OSSL_FUNC_PROVIDER_GET0_PROVIDER_CTX,
2153 (void (*)(void))core_provider_get0_provider_ctx },
2154 { OSSL_FUNC_PROVIDER_GET0_DISPATCH,
2155 (void (*)(void))core_provider_get0_dispatch },
2156 { OSSL_FUNC_PROVIDER_UP_REF,
2157 (void (*)(void))core_provider_up_ref_intern },
2158 { OSSL_FUNC_PROVIDER_FREE,
2159 (void (*)(void))core_provider_free_intern },
2160 { OSSL_FUNC_CORE_OBJ_ADD_SIGID, (void (*)(void))core_obj_add_sigid },
2161 { OSSL_FUNC_CORE_OBJ_CREATE, (void (*)(void))core_obj_create },
2165 static const OSSL_DISPATCH *core_dispatch = core_dispatch_;