1 /*
2 * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <assert.h>
11 #include <openssl/core.h>
12 #include <openssl/core_dispatch.h>
13 #include <openssl/core_names.h>
14 #include <openssl/provider.h>
15 #include <openssl/params.h>
16 #include <openssl/opensslv.h>
17 #include "crypto/cryptlib.h"
18 #include "crypto/evp.h" /* evp_method_store_flush */
19 #include "crypto/rand.h"
20 #include "internal/nelem.h"
21 #include "internal/thread_once.h"
22 #include "internal/provider.h"
23 #include "internal/refcount.h"
24 #include "internal/bio.h"
25 #include "internal/core.h"
26 #include "provider_local.h"
27 #ifndef FIPS_MODULE
28 # include <openssl/self_test.h>
29 #endif
30
31 /*
32 * This file defines and uses a number of different structures:
33 *
34 * OSSL_PROVIDER (provider_st): Used to represent all information related to a
35 * single instance of a provider.
36 *
37 * provider_store_st: Holds information about the collection of providers that
38 * are available within the current library context (OSSL_LIB_CTX). It also
39 * holds configuration information about providers that could be loaded at some
40 * future point.
41 *
42 * OSSL_PROVIDER_CHILD_CB: An instance of this structure holds the callbacks
43 * that have been registered for a child library context and the associated
44 * provider that registered those callbacks.
45 *
46 * Where a child library context exists then it has its own instance of the
47 * provider store. Each provider that exists in the parent provider store, has
48 * an associated child provider in the child library context's provider store.
49 * As providers get activated or deactivated this needs to be mirrored in the
50 * associated child providers.
51 *
52 * LOCKING
53 * =======
54 *
55 * There are a number of different locks used in this file and it is important
56 * to understand how they should be used in order to avoid deadlocks.
57 *
58 * Fields within a structure can often be "write once" on creation, and then
59 * "read many". Creation of a structure is done by a single thread, and
60 * therefore no lock is required for the "write once/read many" fields. It is
61 * safe for multiple threads to read these fields without a lock, because they
62 * will never be changed.
63 *
64 * However some fields may be changed after a structure has been created and
65 * shared between multiple threads. Where this is the case a lock is required.
66 *
67 * The locks available are:
68 *
69 * The provider flag_lock: Used to control updates to the various provider
70 * "flags" (flag_initialized, flag_activated, flag_fallback) and associated
71 * "counts" (activatecnt).
72 *
73 * The provider refcnt_lock: Only ever used to control updates to the provider
74 * refcnt value.
75 *
76 * The provider optbits_lock: Used to control access to the provider's
77 * operation_bits and operation_bits_sz fields.
78 *
79 * The store default_path_lock: Used to control access to the provider store's
80 * default search path value (default_path)
81 *
82 * The store lock: Used to control the stack of provider's held within the
83 * provider store, as well as the stack of registered child provider callbacks.
84 *
85 * As a general rule-of-thumb it is best to:
86 * - keep the scope of the code that is protected by a lock to the absolute
87 * minimum possible;
88 * - try to keep the scope of the lock to within a single function (i.e. avoid
89 * making calls to other functions while holding a lock);
90 * - try to only ever hold one lock at a time.
91 *
92 * Unfortunately, it is not always possible to stick to the above guidelines.
93 * Where they are not adhered to there is always a danger of inadvertently
94 * introducing the possibility of deadlock. The following rules MUST be adhered
95 * to in order to avoid that:
96 * - Holding multiple locks at the same time is only allowed for the
97 * provider store lock, the provider flag_lock and the provider refcnt_lock.
98 * - When holding multiple locks they must be acquired in the following order of
99 * precedence:
100 * 1) provider store lock
101 * 2) provider flag_lock
102 * 3) provider refcnt_lock
103 * - When releasing locks they must be released in the reverse order to which
104 * they were acquired
105 * - No locks may be held when making an upcall. NOTE: Some common functions
106 * can make upcalls as part of their normal operation. If you need to call
107 * some other function while holding a lock make sure you know whether it
108 * will make any upcalls or not. For example ossl_provider_up_ref() can call
109 * ossl_provider_up_ref_parent() which can call the c_prov_up_ref() upcall.
110 * - It is permissible to hold the store lock when calling child provider
111 * callbacks. No other locks may be held during such callbacks.
112 */
113
114 static OSSL_PROVIDER *provider_new(const char *name,
115 OSSL_provider_init_fn *init_function,
116 STACK_OF(INFOPAIR) *parameters);
117
118 /*-
119 * Provider Object structure
120 * =========================
121 */
122
123 #ifndef FIPS_MODULE
124 typedef struct {
125 OSSL_PROVIDER *prov;
126 int (*create_cb)(const OSSL_CORE_HANDLE *provider, void *cbdata);
127 int (*remove_cb)(const OSSL_CORE_HANDLE *provider, void *cbdata);
128 int (*global_props_cb)(const char *props, void *cbdata);
129 void *cbdata;
130 } OSSL_PROVIDER_CHILD_CB;
131 DEFINE_STACK_OF(OSSL_PROVIDER_CHILD_CB)
132 #endif
133
134 struct provider_store_st; /* Forward declaration */
135
136 struct ossl_provider_st {
137 /* Flag bits */
138 unsigned int flag_initialized:1;
139 unsigned int flag_activated:1;
140 unsigned int flag_fallback:1; /* Can be used as fallback */
141
142 /* Getting and setting the flags require synchronization */
143 CRYPTO_RWLOCK *flag_lock;
144
145 /* OpenSSL library side data */
146 CRYPTO_REF_COUNT refcnt;
147 CRYPTO_RWLOCK *refcnt_lock; /* For the ref counter */
148 int activatecnt;
149 char *name;
150 char *path;
151 DSO *module;
152 OSSL_provider_init_fn *init_function;
153 STACK_OF(INFOPAIR) *parameters;
154 OSSL_LIB_CTX *libctx; /* The library context this instance is in */
155 struct provider_store_st *store; /* The store this instance belongs to */
156 #ifndef FIPS_MODULE
157 /*
158 * In the FIPS module inner provider, this isn't needed, since the
159 * error upcalls are always direct calls to the outer provider.
160 */
161 int error_lib; /* ERR library number, one for each provider */
162 # ifndef OPENSSL_NO_ERR
163 ERR_STRING_DATA *error_strings; /* Copy of what the provider gives us */
164 # endif
165 #endif
166
167 /* Provider side functions */
168 OSSL_FUNC_provider_teardown_fn *teardown;
169 OSSL_FUNC_provider_gettable_params_fn *gettable_params;
170 OSSL_FUNC_provider_get_params_fn *get_params;
171 OSSL_FUNC_provider_get_capabilities_fn *get_capabilities;
172 OSSL_FUNC_provider_self_test_fn *self_test;
173 OSSL_FUNC_provider_query_operation_fn *query_operation;
174 OSSL_FUNC_provider_unquery_operation_fn *unquery_operation;
175
176 /*
177 * Cache of bit to indicate of query_operation() has been called on
178 * a specific operation or not.
179 */
180 unsigned char *operation_bits;
181 size_t operation_bits_sz;
182 CRYPTO_RWLOCK *opbits_lock;
183
184 #ifndef FIPS_MODULE
185 /* Whether this provider is the child of some other provider */
186 const OSSL_CORE_HANDLE *handle;
187 unsigned int ischild:1;
188 #endif
189
190 /* Provider side data */
191 void *provctx;
192 const OSSL_DISPATCH *dispatch;
193 };
DEFINE_STACK_OF(OSSL_PROVIDER)194 DEFINE_STACK_OF(OSSL_PROVIDER)
195
196 static int ossl_provider_cmp(const OSSL_PROVIDER * const *a,
197 const OSSL_PROVIDER * const *b)
198 {
199 return strcmp((*a)->name, (*b)->name);
200 }
201
202 /*-
203 * Provider Object store
204 * =====================
205 *
206 * The Provider Object store is a library context object, and therefore needs
207 * an index.
208 */
209
210 struct provider_store_st {
211 OSSL_LIB_CTX *libctx;
212 STACK_OF(OSSL_PROVIDER) *providers;
213 STACK_OF(OSSL_PROVIDER_CHILD_CB) *child_cbs;
214 CRYPTO_RWLOCK *default_path_lock;
215 CRYPTO_RWLOCK *lock;
216 char *default_path;
217 OSSL_PROVIDER_INFO *provinfo;
218 size_t numprovinfo;
219 size_t provinfosz;
220 unsigned int use_fallbacks:1;
221 unsigned int freeing:1;
222 };
223
224 /*
225 * provider_deactivate_free() is a wrapper around ossl_provider_deactivate()
226 * and ossl_provider_free(), called as needed.
227 * Since this is only called when the provider store is being emptied, we
228 * don't need to care about any lock.
229 */
provider_deactivate_free(OSSL_PROVIDER * prov)230 static void provider_deactivate_free(OSSL_PROVIDER *prov)
231 {
232 if (prov->flag_activated)
233 ossl_provider_deactivate(prov);
234 ossl_provider_free(prov);
235 }
236
237 #ifndef FIPS_MODULE
ossl_provider_child_cb_free(OSSL_PROVIDER_CHILD_CB * cb)238 static void ossl_provider_child_cb_free(OSSL_PROVIDER_CHILD_CB *cb)
239 {
240 OPENSSL_free(cb);
241 }
242 #endif
243
infopair_free(INFOPAIR * pair)244 static void infopair_free(INFOPAIR *pair)
245 {
246 OPENSSL_free(pair->name);
247 OPENSSL_free(pair->value);
248 OPENSSL_free(pair);
249 }
250
infopair_copy(const INFOPAIR * src)251 static INFOPAIR *infopair_copy(const INFOPAIR *src)
252 {
253 INFOPAIR *dest = OPENSSL_zalloc(sizeof(*dest));
254
255 if (dest == NULL)
256 return NULL;
257 if (src->name != NULL) {
258 dest->name = OPENSSL_strdup(src->name);
259 if (dest->name == NULL)
260 goto err;
261 }
262 if (src->value != NULL) {
263 dest->value = OPENSSL_strdup(src->value);
264 if (dest->value == NULL)
265 goto err;
266 }
267 return dest;
268 err:
269 OPENSSL_free(dest->name);
270 OPENSSL_free(dest);
271 return NULL;
272 }
273
ossl_provider_info_clear(OSSL_PROVIDER_INFO * info)274 void ossl_provider_info_clear(OSSL_PROVIDER_INFO *info)
275 {
276 OPENSSL_free(info->name);
277 OPENSSL_free(info->path);
278 sk_INFOPAIR_pop_free(info->parameters, infopair_free);
279 }
280
provider_store_free(void * vstore)281 static void provider_store_free(void *vstore)
282 {
283 struct provider_store_st *store = vstore;
284 size_t i;
285
286 if (store == NULL)
287 return;
288 store->freeing = 1;
289 OPENSSL_free(store->default_path);
290 sk_OSSL_PROVIDER_pop_free(store->providers, provider_deactivate_free);
291 #ifndef FIPS_MODULE
292 sk_OSSL_PROVIDER_CHILD_CB_pop_free(store->child_cbs,
293 ossl_provider_child_cb_free);
294 #endif
295 CRYPTO_THREAD_lock_free(store->default_path_lock);
296 CRYPTO_THREAD_lock_free(store->lock);
297 for (i = 0; i < store->numprovinfo; i++)
298 ossl_provider_info_clear(&store->provinfo[i]);
299 OPENSSL_free(store->provinfo);
300 OPENSSL_free(store);
301 }
302
provider_store_new(OSSL_LIB_CTX * ctx)303 static void *provider_store_new(OSSL_LIB_CTX *ctx)
304 {
305 struct provider_store_st *store = OPENSSL_zalloc(sizeof(*store));
306
307 if (store == NULL
308 || (store->providers = sk_OSSL_PROVIDER_new(ossl_provider_cmp)) == NULL
309 || (store->default_path_lock = CRYPTO_THREAD_lock_new()) == NULL
310 #ifndef FIPS_MODULE
311 || (store->child_cbs = sk_OSSL_PROVIDER_CHILD_CB_new_null()) == NULL
312 #endif
313 || (store->lock = CRYPTO_THREAD_lock_new()) == NULL) {
314 provider_store_free(store);
315 return NULL;
316 }
317 store->libctx = ctx;
318 store->use_fallbacks = 1;
319
320 return store;
321 }
322
323 static const OSSL_LIB_CTX_METHOD provider_store_method = {
324 /* Needs to be freed before the child provider data is freed */
325 OSSL_LIB_CTX_METHOD_PRIORITY_1,
326 provider_store_new,
327 provider_store_free,
328 };
329
get_provider_store(OSSL_LIB_CTX * libctx)330 static struct provider_store_st *get_provider_store(OSSL_LIB_CTX *libctx)
331 {
332 struct provider_store_st *store = NULL;
333
334 store = ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_PROVIDER_STORE_INDEX,
335 &provider_store_method);
336 if (store == NULL)
337 ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
338 return store;
339 }
340
ossl_provider_disable_fallback_loading(OSSL_LIB_CTX * libctx)341 int ossl_provider_disable_fallback_loading(OSSL_LIB_CTX *libctx)
342 {
343 struct provider_store_st *store;
344
345 if ((store = get_provider_store(libctx)) != NULL) {
346 if (!CRYPTO_THREAD_write_lock(store->lock))
347 return 0;
348 store->use_fallbacks = 0;
349 CRYPTO_THREAD_unlock(store->lock);
350 return 1;
351 }
352 return 0;
353 }
354
355 #define BUILTINS_BLOCK_SIZE 10
356
ossl_provider_info_add_to_store(OSSL_LIB_CTX * libctx,OSSL_PROVIDER_INFO * entry)357 int ossl_provider_info_add_to_store(OSSL_LIB_CTX *libctx,
358 OSSL_PROVIDER_INFO *entry)
359 {
360 struct provider_store_st *store = get_provider_store(libctx);
361 int ret = 0;
362
363 if (entry->name == NULL) {
364 ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
365 return 0;
366 }
367
368 if (store == NULL) {
369 ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
370 return 0;
371 }
372
373 if (!CRYPTO_THREAD_write_lock(store->lock))
374 return 0;
375 if (store->provinfosz == 0) {
376 store->provinfo = OPENSSL_zalloc(sizeof(*store->provinfo)
377 * BUILTINS_BLOCK_SIZE);
378 if (store->provinfo == NULL) {
379 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
380 goto err;
381 }
382 store->provinfosz = BUILTINS_BLOCK_SIZE;
383 } else if (store->numprovinfo == store->provinfosz) {
384 OSSL_PROVIDER_INFO *tmpbuiltins;
385 size_t newsz = store->provinfosz + BUILTINS_BLOCK_SIZE;
386
387 tmpbuiltins = OPENSSL_realloc(store->provinfo,
388 sizeof(*store->provinfo) * newsz);
389 if (tmpbuiltins == NULL) {
390 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
391 goto err;
392 }
393 store->provinfo = tmpbuiltins;
394 store->provinfosz = newsz;
395 }
396 store->provinfo[store->numprovinfo] = *entry;
397 store->numprovinfo++;
398
399 ret = 1;
400 err:
401 CRYPTO_THREAD_unlock(store->lock);
402 return ret;
403 }
404
ossl_provider_find(OSSL_LIB_CTX * libctx,const char * name,int noconfig)405 OSSL_PROVIDER *ossl_provider_find(OSSL_LIB_CTX *libctx, const char *name,
406 int noconfig)
407 {
408 struct provider_store_st *store = NULL;
409 OSSL_PROVIDER *prov = NULL;
410
411 if ((store = get_provider_store(libctx)) != NULL) {
412 OSSL_PROVIDER tmpl = { 0, };
413 int i;
414
415 #ifndef FIPS_MODULE
416 /*
417 * Make sure any providers are loaded from config before we try to find
418 * them.
419 */
420 if (!noconfig) {
421 if (ossl_lib_ctx_is_default(libctx))
422 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
423 }
424 #endif
425
426 tmpl.name = (char *)name;
427 if (!CRYPTO_THREAD_read_lock(store->lock))
428 return NULL;
429 if ((i = sk_OSSL_PROVIDER_find(store->providers, &tmpl)) != -1)
430 prov = sk_OSSL_PROVIDER_value(store->providers, i);
431 CRYPTO_THREAD_unlock(store->lock);
432 if (prov != NULL && !ossl_provider_up_ref(prov))
433 prov = NULL;
434 }
435
436 return prov;
437 }
438
439 /*-
440 * Provider Object methods
441 * =======================
442 */
443
provider_new(const char * name,OSSL_provider_init_fn * init_function,STACK_OF (INFOPAIR)* parameters)444 static OSSL_PROVIDER *provider_new(const char *name,
445 OSSL_provider_init_fn *init_function,
446 STACK_OF(INFOPAIR) *parameters)
447 {
448 OSSL_PROVIDER *prov = NULL;
449
450 if ((prov = OPENSSL_zalloc(sizeof(*prov))) == NULL
451 #ifndef HAVE_ATOMICS
452 || (prov->refcnt_lock = CRYPTO_THREAD_lock_new()) == NULL
453 #endif
454 || (prov->opbits_lock = CRYPTO_THREAD_lock_new()) == NULL
455 || (prov->flag_lock = CRYPTO_THREAD_lock_new()) == NULL
456 || (prov->name = OPENSSL_strdup(name)) == NULL
457 || (prov->parameters = sk_INFOPAIR_deep_copy(parameters,
458 infopair_copy,
459 infopair_free)) == NULL) {
460 ossl_provider_free(prov);
461 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
462 return NULL;
463 }
464
465 prov->refcnt = 1; /* 1 One reference to be returned */
466 prov->init_function = init_function;
467
468 return prov;
469 }
470
ossl_provider_up_ref(OSSL_PROVIDER * prov)471 int ossl_provider_up_ref(OSSL_PROVIDER *prov)
472 {
473 int ref = 0;
474
475 if (CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock) <= 0)
476 return 0;
477
478 #ifndef FIPS_MODULE
479 if (prov->ischild) {
480 if (!ossl_provider_up_ref_parent(prov, 0)) {
481 ossl_provider_free(prov);
482 return 0;
483 }
484 }
485 #endif
486
487 return ref;
488 }
489
490 #ifndef FIPS_MODULE
provider_up_ref_intern(OSSL_PROVIDER * prov,int activate)491 static int provider_up_ref_intern(OSSL_PROVIDER *prov, int activate)
492 {
493 if (activate)
494 return ossl_provider_activate(prov, 1, 0);
495
496 return ossl_provider_up_ref(prov);
497 }
498
provider_free_intern(OSSL_PROVIDER * prov,int deactivate)499 static int provider_free_intern(OSSL_PROVIDER *prov, int deactivate)
500 {
501 if (deactivate)
502 return ossl_provider_deactivate(prov);
503
504 ossl_provider_free(prov);
505 return 1;
506 }
507 #endif
508
ossl_provider_new(OSSL_LIB_CTX * libctx,const char * name,OSSL_provider_init_fn * init_function,int noconfig)509 OSSL_PROVIDER *ossl_provider_new(OSSL_LIB_CTX *libctx, const char *name,
510 OSSL_provider_init_fn *init_function,
511 int noconfig)
512 {
513 struct provider_store_st *store = NULL;
514 OSSL_PROVIDER_INFO template;
515 OSSL_PROVIDER *prov = NULL;
516
517 if ((store = get_provider_store(libctx)) == NULL)
518 return NULL;
519
520 if ((prov = ossl_provider_find(libctx, name,
521 noconfig)) != NULL) { /* refcount +1 */
522 ossl_provider_free(prov); /* refcount -1 */
523 ERR_raise_data(ERR_LIB_CRYPTO, CRYPTO_R_PROVIDER_ALREADY_EXISTS,
524 "name=%s", name);
525 return NULL;
526 }
527
528 memset(&template, 0, sizeof(template));
529 if (init_function == NULL) {
530 const OSSL_PROVIDER_INFO *p;
531 size_t i;
532
533 /* Check if this is a predefined builtin provider */
534 for (p = ossl_predefined_providers; p->name != NULL; p++) {
535 if (strcmp(p->name, name) == 0) {
536 template = *p;
537 break;
538 }
539 }
540 if (p->name == NULL) {
541 /* Check if this is a user added builtin provider */
542 if (!CRYPTO_THREAD_read_lock(store->lock))
543 return NULL;
544 for (i = 0, p = store->provinfo; i < store->numprovinfo; p++, i++) {
545 if (strcmp(p->name, name) == 0) {
546 template = *p;
547 break;
548 }
549 }
550 CRYPTO_THREAD_unlock(store->lock);
551 }
552 } else {
553 template.init = init_function;
554 }
555
556 /* provider_new() generates an error, so no need here */
557 if ((prov = provider_new(name, template.init, template.parameters)) == NULL)
558 return NULL;
559
560 prov->libctx = libctx;
561 #ifndef FIPS_MODULE
562 prov->error_lib = ERR_get_next_error_library();
563 #endif
564
565 /*
566 * At this point, the provider is only partially "loaded". To be
567 * fully "loaded", ossl_provider_activate() must also be called and it must
568 * then be added to the provider store.
569 */
570
571 return prov;
572 }
573
574 /* Assumes that the store lock is held */
create_provider_children(OSSL_PROVIDER * prov)575 static int create_provider_children(OSSL_PROVIDER *prov)
576 {
577 int ret = 1;
578 #ifndef FIPS_MODULE
579 struct provider_store_st *store = prov->store;
580 OSSL_PROVIDER_CHILD_CB *child_cb;
581 int i, max;
582
583 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
584 for (i = 0; i < max; i++) {
585 /*
586 * This is newly activated (activatecnt == 1), so we need to
587 * create child providers as necessary.
588 */
589 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
590 ret &= child_cb->create_cb((OSSL_CORE_HANDLE *)prov, child_cb->cbdata);
591 }
592 #endif
593
594 return ret;
595 }
596
ossl_provider_add_to_store(OSSL_PROVIDER * prov,OSSL_PROVIDER ** actualprov,int retain_fallbacks)597 int ossl_provider_add_to_store(OSSL_PROVIDER *prov, OSSL_PROVIDER **actualprov,
598 int retain_fallbacks)
599 {
600 struct provider_store_st *store;
601 int idx;
602 OSSL_PROVIDER tmpl = { 0, };
603 OSSL_PROVIDER *actualtmp = NULL;
604
605 if ((store = get_provider_store(prov->libctx)) == NULL)
606 return 0;
607
608 if (!CRYPTO_THREAD_write_lock(store->lock))
609 return 0;
610
611 tmpl.name = (char *)prov->name;
612 idx = sk_OSSL_PROVIDER_find(store->providers, &tmpl);
613 if (idx == -1)
614 actualtmp = prov;
615 else
616 actualtmp = sk_OSSL_PROVIDER_value(store->providers, idx);
617
618 if (idx == -1) {
619 if (sk_OSSL_PROVIDER_push(store->providers, prov) == 0)
620 goto err;
621 prov->store = store;
622 if (!create_provider_children(prov)) {
623 sk_OSSL_PROVIDER_delete_ptr(store->providers, prov);
624 goto err;
625 }
626 if (!retain_fallbacks)
627 store->use_fallbacks = 0;
628 }
629
630 CRYPTO_THREAD_unlock(store->lock);
631
632 if (actualprov != NULL) {
633 if (!ossl_provider_up_ref(actualtmp)) {
634 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
635 actualtmp = NULL;
636 goto err;
637 }
638 *actualprov = actualtmp;
639 }
640
641 if (idx >= 0) {
642 /*
643 * The provider is already in the store. Probably two threads
644 * independently initialised their own provider objects with the same
645 * name and raced to put them in the store. This thread lost. We
646 * deactivate the one we just created and use the one that already
647 * exists instead.
648 */
649 ossl_provider_deactivate(prov);
650 ossl_provider_free(prov);
651 }
652
653 return 1;
654
655 err:
656 CRYPTO_THREAD_unlock(store->lock);
657 if (actualprov != NULL)
658 ossl_provider_free(actualtmp);
659 return 0;
660 }
661
ossl_provider_free(OSSL_PROVIDER * prov)662 void ossl_provider_free(OSSL_PROVIDER *prov)
663 {
664 if (prov != NULL) {
665 int ref = 0;
666
667 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
668
669 /*
670 * When the refcount drops to zero, we clean up the provider.
671 * Note that this also does teardown, which may seem late,
672 * considering that init happens on first activation. However,
673 * there may be other structures hanging on to the provider after
674 * the last deactivation and may therefore need full access to the
675 * provider's services. Therefore, we deinit late.
676 */
677 if (ref == 0) {
678 if (prov->flag_initialized) {
679 ossl_provider_teardown(prov);
680 #ifndef OPENSSL_NO_ERR
681 # ifndef FIPS_MODULE
682 if (prov->error_strings != NULL) {
683 ERR_unload_strings(prov->error_lib, prov->error_strings);
684 OPENSSL_free(prov->error_strings);
685 prov->error_strings = NULL;
686 }
687 # endif
688 #endif
689 OPENSSL_free(prov->operation_bits);
690 prov->operation_bits = NULL;
691 prov->operation_bits_sz = 0;
692 prov->flag_initialized = 0;
693 }
694
695 #ifndef FIPS_MODULE
696 /*
697 * We deregister thread handling whether or not the provider was
698 * initialized. If init was attempted but was not successful then
699 * the provider may still have registered a thread handler.
700 */
701 ossl_init_thread_deregister(prov);
702 DSO_free(prov->module);
703 #endif
704 OPENSSL_free(prov->name);
705 OPENSSL_free(prov->path);
706 sk_INFOPAIR_pop_free(prov->parameters, infopair_free);
707 CRYPTO_THREAD_lock_free(prov->opbits_lock);
708 CRYPTO_THREAD_lock_free(prov->flag_lock);
709 #ifndef HAVE_ATOMICS
710 CRYPTO_THREAD_lock_free(prov->refcnt_lock);
711 #endif
712 OPENSSL_free(prov);
713 }
714 #ifndef FIPS_MODULE
715 else if (prov->ischild) {
716 ossl_provider_free_parent(prov, 0);
717 }
718 #endif
719 }
720 }
721
722 /* Setters */
ossl_provider_set_module_path(OSSL_PROVIDER * prov,const char * module_path)723 int ossl_provider_set_module_path(OSSL_PROVIDER *prov, const char *module_path)
724 {
725 OPENSSL_free(prov->path);
726 prov->path = NULL;
727 if (module_path == NULL)
728 return 1;
729 if ((prov->path = OPENSSL_strdup(module_path)) != NULL)
730 return 1;
731 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
732 return 0;
733 }
734
infopair_add(STACK_OF (INFOPAIR)** infopairsk,const char * name,const char * value)735 static int infopair_add(STACK_OF(INFOPAIR) **infopairsk, const char *name,
736 const char *value)
737 {
738 INFOPAIR *pair = NULL;
739
740 if ((pair = OPENSSL_zalloc(sizeof(*pair))) != NULL
741 && (*infopairsk != NULL
742 || (*infopairsk = sk_INFOPAIR_new_null()) != NULL)
743 && (pair->name = OPENSSL_strdup(name)) != NULL
744 && (pair->value = OPENSSL_strdup(value)) != NULL
745 && sk_INFOPAIR_push(*infopairsk, pair) > 0)
746 return 1;
747
748 if (pair != NULL) {
749 OPENSSL_free(pair->name);
750 OPENSSL_free(pair->value);
751 OPENSSL_free(pair);
752 }
753 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
754 return 0;
755 }
756
ossl_provider_add_parameter(OSSL_PROVIDER * prov,const char * name,const char * value)757 int ossl_provider_add_parameter(OSSL_PROVIDER *prov,
758 const char *name, const char *value)
759 {
760 return infopair_add(&prov->parameters, name, value);
761 }
762
ossl_provider_info_add_parameter(OSSL_PROVIDER_INFO * provinfo,const char * name,const char * value)763 int ossl_provider_info_add_parameter(OSSL_PROVIDER_INFO *provinfo,
764 const char *name,
765 const char *value)
766 {
767 return infopair_add(&provinfo->parameters, name, value);
768 }
769
770 /*
771 * Provider activation.
772 *
773 * What "activation" means depends on the provider form; for built in
774 * providers (in the library or the application alike), the provider
775 * can already be considered to be loaded, all that's needed is to
776 * initialize it. However, for dynamically loadable provider modules,
777 * we must first load that module.
778 *
779 * Built in modules are distinguished from dynamically loaded modules
780 * with an already assigned init function.
781 */
782 static const OSSL_DISPATCH *core_dispatch; /* Define further down */
783
OSSL_PROVIDER_set_default_search_path(OSSL_LIB_CTX * libctx,const char * path)784 int OSSL_PROVIDER_set_default_search_path(OSSL_LIB_CTX *libctx,
785 const char *path)
786 {
787 struct provider_store_st *store;
788 char *p = NULL;
789
790 if (path != NULL) {
791 p = OPENSSL_strdup(path);
792 if (p == NULL) {
793 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
794 return 0;
795 }
796 }
797 if ((store = get_provider_store(libctx)) != NULL
798 && CRYPTO_THREAD_write_lock(store->default_path_lock)) {
799 OPENSSL_free(store->default_path);
800 store->default_path = p;
801 CRYPTO_THREAD_unlock(store->default_path_lock);
802 return 1;
803 }
804 OPENSSL_free(p);
805 return 0;
806 }
807
808 /*
809 * Internal version that doesn't affect the store flags, and thereby avoid
810 * locking. Direct callers must remember to set the store flags when
811 * appropriate.
812 */
provider_init(OSSL_PROVIDER * prov)813 static int provider_init(OSSL_PROVIDER *prov)
814 {
815 const OSSL_DISPATCH *provider_dispatch = NULL;
816 void *tmp_provctx = NULL; /* safety measure */
817 #ifndef OPENSSL_NO_ERR
818 # ifndef FIPS_MODULE
819 OSSL_FUNC_provider_get_reason_strings_fn *p_get_reason_strings = NULL;
820 # endif
821 #endif
822 int ok = 0;
823
824 if (!ossl_assert(!prov->flag_initialized)) {
825 ERR_raise(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR);
826 goto end;
827 }
828
829 /*
830 * If the init function isn't set, it indicates that this provider is
831 * a loadable module.
832 */
833 if (prov->init_function == NULL) {
834 #ifdef FIPS_MODULE
835 goto end;
836 #else
837 if (prov->module == NULL) {
838 char *allocated_path = NULL;
839 const char *module_path = NULL;
840 char *merged_path = NULL;
841 const char *load_dir = NULL;
842 char *allocated_load_dir = NULL;
843 struct provider_store_st *store;
844
845 if ((prov->module = DSO_new()) == NULL) {
846 /* DSO_new() generates an error already */
847 goto end;
848 }
849
850 if ((store = get_provider_store(prov->libctx)) == NULL
851 || !CRYPTO_THREAD_read_lock(store->default_path_lock))
852 goto end;
853
854 if (store->default_path != NULL) {
855 allocated_load_dir = OPENSSL_strdup(store->default_path);
856 CRYPTO_THREAD_unlock(store->default_path_lock);
857 if (allocated_load_dir == NULL) {
858 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
859 goto end;
860 }
861 load_dir = allocated_load_dir;
862 } else {
863 CRYPTO_THREAD_unlock(store->default_path_lock);
864 }
865
866 if (load_dir == NULL) {
867 load_dir = ossl_safe_getenv("OPENSSL_MODULES");
868 if (load_dir == NULL)
869 load_dir = MODULESDIR;
870 }
871
872 DSO_ctrl(prov->module, DSO_CTRL_SET_FLAGS,
873 DSO_FLAG_NAME_TRANSLATION_EXT_ONLY, NULL);
874
875 module_path = prov->path;
876 if (module_path == NULL)
877 module_path = allocated_path =
878 DSO_convert_filename(prov->module, prov->name);
879 if (module_path != NULL)
880 merged_path = DSO_merge(prov->module, module_path, load_dir);
881
882 if (merged_path == NULL
883 || (DSO_load(prov->module, merged_path, NULL, 0)) == NULL) {
884 DSO_free(prov->module);
885 prov->module = NULL;
886 }
887
888 OPENSSL_free(merged_path);
889 OPENSSL_free(allocated_path);
890 OPENSSL_free(allocated_load_dir);
891 }
892
893 if (prov->module != NULL)
894 prov->init_function = (OSSL_provider_init_fn *)
895 DSO_bind_func(prov->module, "OSSL_provider_init");
896 #endif
897 }
898
899 /* Call the initialise function for the provider. */
900 if (prov->init_function == NULL
901 || !prov->init_function((OSSL_CORE_HANDLE *)prov, core_dispatch,
902 &provider_dispatch, &tmp_provctx)) {
903 ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_INIT_FAIL,
904 "name=%s", prov->name);
905 goto end;
906 }
907 prov->provctx = tmp_provctx;
908 prov->dispatch = provider_dispatch;
909
910 for (; provider_dispatch->function_id != 0; provider_dispatch++) {
911 switch (provider_dispatch->function_id) {
912 case OSSL_FUNC_PROVIDER_TEARDOWN:
913 prov->teardown =
914 OSSL_FUNC_provider_teardown(provider_dispatch);
915 break;
916 case OSSL_FUNC_PROVIDER_GETTABLE_PARAMS:
917 prov->gettable_params =
918 OSSL_FUNC_provider_gettable_params(provider_dispatch);
919 break;
920 case OSSL_FUNC_PROVIDER_GET_PARAMS:
921 prov->get_params =
922 OSSL_FUNC_provider_get_params(provider_dispatch);
923 break;
924 case OSSL_FUNC_PROVIDER_SELF_TEST:
925 prov->self_test =
926 OSSL_FUNC_provider_self_test(provider_dispatch);
927 break;
928 case OSSL_FUNC_PROVIDER_GET_CAPABILITIES:
929 prov->get_capabilities =
930 OSSL_FUNC_provider_get_capabilities(provider_dispatch);
931 break;
932 case OSSL_FUNC_PROVIDER_QUERY_OPERATION:
933 prov->query_operation =
934 OSSL_FUNC_provider_query_operation(provider_dispatch);
935 break;
936 case OSSL_FUNC_PROVIDER_UNQUERY_OPERATION:
937 prov->unquery_operation =
938 OSSL_FUNC_provider_unquery_operation(provider_dispatch);
939 break;
940 #ifndef OPENSSL_NO_ERR
941 # ifndef FIPS_MODULE
942 case OSSL_FUNC_PROVIDER_GET_REASON_STRINGS:
943 p_get_reason_strings =
944 OSSL_FUNC_provider_get_reason_strings(provider_dispatch);
945 break;
946 # endif
947 #endif
948 }
949 }
950
951 #ifndef OPENSSL_NO_ERR
952 # ifndef FIPS_MODULE
953 if (p_get_reason_strings != NULL) {
954 const OSSL_ITEM *reasonstrings = p_get_reason_strings(prov->provctx);
955 size_t cnt, cnt2;
956
957 /*
958 * ERR_load_strings() handles ERR_STRING_DATA rather than OSSL_ITEM,
959 * although they are essentially the same type.
960 * Furthermore, ERR_load_strings() patches the array's error number
961 * with the error library number, so we need to make a copy of that
962 * array either way.
963 */
964 cnt = 0;
965 while (reasonstrings[cnt].id != 0) {
966 if (ERR_GET_LIB(reasonstrings[cnt].id) != 0)
967 goto end;
968 cnt++;
969 }
970 cnt++; /* One for the terminating item */
971
972 /* Allocate one extra item for the "library" name */
973 prov->error_strings =
974 OPENSSL_zalloc(sizeof(ERR_STRING_DATA) * (cnt + 1));
975 if (prov->error_strings == NULL)
976 goto end;
977
978 /*
979 * Set the "library" name.
980 */
981 prov->error_strings[0].error = ERR_PACK(prov->error_lib, 0, 0);
982 prov->error_strings[0].string = prov->name;
983 /*
984 * Copy reasonstrings item 0..cnt-1 to prov->error_trings positions
985 * 1..cnt.
986 */
987 for (cnt2 = 1; cnt2 <= cnt; cnt2++) {
988 prov->error_strings[cnt2].error = (int)reasonstrings[cnt2-1].id;
989 prov->error_strings[cnt2].string = reasonstrings[cnt2-1].ptr;
990 }
991
992 ERR_load_strings(prov->error_lib, prov->error_strings);
993 }
994 # endif
995 #endif
996
997 /* With this flag set, this provider has become fully "loaded". */
998 prov->flag_initialized = 1;
999 ok = 1;
1000
1001 end:
1002 return ok;
1003 }
1004
1005 /*
1006 * Deactivate a provider.
1007 * Return -1 on failure and the activation count on success
1008 */
provider_deactivate(OSSL_PROVIDER * prov,int upcalls)1009 static int provider_deactivate(OSSL_PROVIDER *prov, int upcalls)
1010 {
1011 int count;
1012 struct provider_store_st *store;
1013 #ifndef FIPS_MODULE
1014 int freeparent = 0, removechildren = 0;
1015 #endif
1016
1017 if (!ossl_assert(prov != NULL))
1018 return -1;
1019
1020 store = get_provider_store(prov->libctx);
1021 if (store == NULL)
1022 return -1;
1023
1024 if (!CRYPTO_THREAD_read_lock(store->lock))
1025 return -1;
1026 if (!CRYPTO_THREAD_write_lock(prov->flag_lock)) {
1027 CRYPTO_THREAD_unlock(store->lock);
1028 return -1;
1029 }
1030
1031 #ifndef FIPS_MODULE
1032 if (prov->activatecnt >= 2 && prov->ischild && upcalls) {
1033 /*
1034 * We have had a direct activation in this child libctx so we need to
1035 * now down the ref count in the parent provider. We do the actual down
1036 * ref outside of the flag_lock, since it could involve getting other
1037 * locks.
1038 */
1039 freeparent = 1;
1040 }
1041 #endif
1042
1043 if ((count = --prov->activatecnt) < 1) {
1044 prov->flag_activated = 0;
1045 #ifndef FIPS_MODULE
1046 removechildren = 1;
1047 #endif
1048 }
1049
1050 CRYPTO_THREAD_unlock(prov->flag_lock);
1051
1052 #ifndef FIPS_MODULE
1053 if (removechildren) {
1054 int i, max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1055 OSSL_PROVIDER_CHILD_CB *child_cb;
1056
1057 for (i = 0; i < max; i++) {
1058 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1059 child_cb->remove_cb((OSSL_CORE_HANDLE *)prov, child_cb->cbdata);
1060 }
1061 }
1062 #endif
1063 CRYPTO_THREAD_unlock(store->lock);
1064 #ifndef FIPS_MODULE
1065 if (freeparent)
1066 ossl_provider_free_parent(prov, 1);
1067 #endif
1068
1069 /* We don't deinit here, that's done in ossl_provider_free() */
1070 return count;
1071 }
1072
1073 /*
1074 * Activate a provider.
1075 * Return -1 on failure and the activation count on success
1076 */
provider_activate(OSSL_PROVIDER * prov,int lock,int upcalls)1077 static int provider_activate(OSSL_PROVIDER *prov, int lock, int upcalls)
1078 {
1079 int count = -1;
1080 struct provider_store_st *store;
1081 int ret = 1, createchildren = 0;
1082
1083 store = prov->store;
1084 /*
1085 * If the provider hasn't been added to the store, then we don't need
1086 * any locks because we've not shared it with other threads.
1087 */
1088 if (store == NULL) {
1089 lock = 0;
1090 if (!provider_init(prov))
1091 return -1;
1092 }
1093
1094 #ifndef FIPS_MODULE
1095 if (prov->ischild && upcalls && !ossl_provider_up_ref_parent(prov, 1))
1096 return -1;
1097 #endif
1098
1099 if (lock && !CRYPTO_THREAD_read_lock(store->lock)) {
1100 #ifndef FIPS_MODULE
1101 if (prov->ischild && upcalls)
1102 ossl_provider_free_parent(prov, 1);
1103 #endif
1104 return -1;
1105 }
1106
1107 if (lock && !CRYPTO_THREAD_write_lock(prov->flag_lock)) {
1108 CRYPTO_THREAD_unlock(store->lock);
1109 #ifndef FIPS_MODULE
1110 if (prov->ischild && upcalls)
1111 ossl_provider_free_parent(prov, 1);
1112 #endif
1113 return -1;
1114 }
1115
1116 count = ++prov->activatecnt;
1117 prov->flag_activated = 1;
1118
1119 if (prov->activatecnt == 1 && store != NULL)
1120 createchildren = 1;
1121
1122 if (lock)
1123 CRYPTO_THREAD_unlock(prov->flag_lock);
1124 if (createchildren)
1125 ret = create_provider_children(prov);
1126 if (lock)
1127 CRYPTO_THREAD_unlock(store->lock);
1128
1129 if (!ret)
1130 return -1;
1131
1132 return count;
1133 }
1134
provider_flush_store_cache(const OSSL_PROVIDER * prov)1135 static int provider_flush_store_cache(const OSSL_PROVIDER *prov)
1136 {
1137 struct provider_store_st *store;
1138 int freeing;
1139
1140 if ((store = get_provider_store(prov->libctx)) == NULL)
1141 return 0;
1142
1143 if (!CRYPTO_THREAD_read_lock(store->lock))
1144 return 0;
1145 freeing = store->freeing;
1146 CRYPTO_THREAD_unlock(store->lock);
1147
1148 if (!freeing)
1149 return evp_method_store_flush(prov->libctx);
1150 return 1;
1151 }
1152
ossl_provider_activate(OSSL_PROVIDER * prov,int upcalls,int aschild)1153 int ossl_provider_activate(OSSL_PROVIDER *prov, int upcalls, int aschild)
1154 {
1155 int count;
1156
1157 if (prov == NULL)
1158 return 0;
1159 #ifndef FIPS_MODULE
1160 /*
1161 * If aschild is true, then we only actually do the activation if the
1162 * provider is a child. If its not, this is still success.
1163 */
1164 if (aschild && !prov->ischild)
1165 return 1;
1166 #endif
1167 if ((count = provider_activate(prov, 1, upcalls)) > 0)
1168 return count == 1 ? provider_flush_store_cache(prov) : 1;
1169
1170 return 0;
1171 }
1172
ossl_provider_deactivate(OSSL_PROVIDER * prov)1173 int ossl_provider_deactivate(OSSL_PROVIDER *prov)
1174 {
1175 int count;
1176
1177 if (prov == NULL || (count = provider_deactivate(prov, 1)) < 0)
1178 return 0;
1179 return count == 0 ? provider_flush_store_cache(prov) : 1;
1180 }
1181
ossl_provider_ctx(const OSSL_PROVIDER * prov)1182 void *ossl_provider_ctx(const OSSL_PROVIDER *prov)
1183 {
1184 return prov->provctx;
1185 }
1186
1187 /*
1188 * This function only does something once when store->use_fallbacks == 1,
1189 * and then sets store->use_fallbacks = 0, so the second call and so on is
1190 * effectively a no-op.
1191 */
provider_activate_fallbacks(struct provider_store_st * store)1192 static int provider_activate_fallbacks(struct provider_store_st *store)
1193 {
1194 int use_fallbacks;
1195 int activated_fallback_count = 0;
1196 int ret = 0;
1197 const OSSL_PROVIDER_INFO *p;
1198
1199 if (!CRYPTO_THREAD_read_lock(store->lock))
1200 return 0;
1201 use_fallbacks = store->use_fallbacks;
1202 CRYPTO_THREAD_unlock(store->lock);
1203 if (!use_fallbacks)
1204 return 1;
1205
1206 if (!CRYPTO_THREAD_write_lock(store->lock))
1207 return 0;
1208 /* Check again, just in case another thread changed it */
1209 use_fallbacks = store->use_fallbacks;
1210 if (!use_fallbacks) {
1211 CRYPTO_THREAD_unlock(store->lock);
1212 return 1;
1213 }
1214
1215 for (p = ossl_predefined_providers; p->name != NULL; p++) {
1216 OSSL_PROVIDER *prov = NULL;
1217
1218 if (!p->is_fallback)
1219 continue;
1220 /*
1221 * We use the internal constructor directly here,
1222 * otherwise we get a call loop
1223 */
1224 prov = provider_new(p->name, p->init, NULL);
1225 if (prov == NULL)
1226 goto err;
1227 prov->libctx = store->libctx;
1228 #ifndef FIPS_MODULE
1229 prov->error_lib = ERR_get_next_error_library();
1230 #endif
1231
1232 /*
1233 * We are calling provider_activate while holding the store lock. This
1234 * means the init function will be called while holding a lock. Normally
1235 * we try to avoid calling a user callback while holding a lock.
1236 * However, fallbacks are never third party providers so we accept this.
1237 */
1238 if (provider_activate(prov, 0, 0) < 0) {
1239 ossl_provider_free(prov);
1240 goto err;
1241 }
1242 prov->store = store;
1243 if (sk_OSSL_PROVIDER_push(store->providers, prov) == 0) {
1244 ossl_provider_free(prov);
1245 goto err;
1246 }
1247 activated_fallback_count++;
1248 }
1249
1250 if (activated_fallback_count > 0) {
1251 store->use_fallbacks = 0;
1252 ret = 1;
1253 }
1254 err:
1255 CRYPTO_THREAD_unlock(store->lock);
1256 return ret;
1257 }
1258
ossl_provider_doall_activated(OSSL_LIB_CTX * ctx,int (* cb)(OSSL_PROVIDER * provider,void * cbdata),void * cbdata)1259 int ossl_provider_doall_activated(OSSL_LIB_CTX *ctx,
1260 int (*cb)(OSSL_PROVIDER *provider,
1261 void *cbdata),
1262 void *cbdata)
1263 {
1264 int ret = 0, curr, max, ref = 0;
1265 struct provider_store_st *store = get_provider_store(ctx);
1266 STACK_OF(OSSL_PROVIDER) *provs = NULL;
1267
1268 #ifndef FIPS_MODULE
1269 /*
1270 * Make sure any providers are loaded from config before we try to use
1271 * them.
1272 */
1273 if (ossl_lib_ctx_is_default(ctx))
1274 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
1275 #endif
1276
1277 if (store == NULL)
1278 return 1;
1279 if (!provider_activate_fallbacks(store))
1280 return 0;
1281
1282 /*
1283 * Under lock, grab a copy of the provider list and up_ref each
1284 * provider so that they don't disappear underneath us.
1285 */
1286 if (!CRYPTO_THREAD_read_lock(store->lock))
1287 return 0;
1288 provs = sk_OSSL_PROVIDER_dup(store->providers);
1289 if (provs == NULL) {
1290 CRYPTO_THREAD_unlock(store->lock);
1291 return 0;
1292 }
1293 max = sk_OSSL_PROVIDER_num(provs);
1294 /*
1295 * We work backwards through the stack so that we can safely delete items
1296 * as we go.
1297 */
1298 for (curr = max - 1; curr >= 0; curr--) {
1299 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1300
1301 if (!CRYPTO_THREAD_write_lock(prov->flag_lock))
1302 goto err_unlock;
1303 if (prov->flag_activated) {
1304 /*
1305 * We call CRYPTO_UP_REF directly rather than ossl_provider_up_ref
1306 * to avoid upping the ref count on the parent provider, which we
1307 * must not do while holding locks.
1308 */
1309 if (CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock) <= 0) {
1310 CRYPTO_THREAD_unlock(prov->flag_lock);
1311 goto err_unlock;
1312 }
1313 /*
1314 * It's already activated, but we up the activated count to ensure
1315 * it remains activated until after we've called the user callback.
1316 * We do this with no locking (because we already hold the locks)
1317 * and no upcalls (which must not be called when locks are held). In
1318 * theory this could mean the parent provider goes inactive, whilst
1319 * still activated in the child for a short period. That's ok.
1320 */
1321 if (provider_activate(prov, 0, 0) < 0) {
1322 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
1323 CRYPTO_THREAD_unlock(prov->flag_lock);
1324 goto err_unlock;
1325 }
1326 } else {
1327 sk_OSSL_PROVIDER_delete(provs, curr);
1328 max--;
1329 }
1330 CRYPTO_THREAD_unlock(prov->flag_lock);
1331 }
1332 CRYPTO_THREAD_unlock(store->lock);
1333
1334 /*
1335 * Now, we sweep through all providers not under lock
1336 */
1337 for (curr = 0; curr < max; curr++) {
1338 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1339
1340 if (!cb(prov, cbdata))
1341 goto finish;
1342 }
1343 curr = -1;
1344
1345 ret = 1;
1346 goto finish;
1347
1348 err_unlock:
1349 CRYPTO_THREAD_unlock(store->lock);
1350 finish:
1351 /*
1352 * The pop_free call doesn't do what we want on an error condition. We
1353 * either start from the first item in the stack, or part way through if
1354 * we only processed some of the items.
1355 */
1356 for (curr++; curr < max; curr++) {
1357 OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(provs, curr);
1358
1359 provider_deactivate(prov, 0);
1360 /*
1361 * As above where we did the up-ref, we don't call ossl_provider_free
1362 * to avoid making upcalls. There should always be at least one ref
1363 * to the provider in the store, so this should never drop to 0.
1364 */
1365 CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
1366 /*
1367 * Not much we can do if this assert ever fails. So we don't use
1368 * ossl_assert here.
1369 */
1370 assert(ref > 0);
1371 }
1372 sk_OSSL_PROVIDER_free(provs);
1373 return ret;
1374 }
1375
OSSL_PROVIDER_available(OSSL_LIB_CTX * libctx,const char * name)1376 int OSSL_PROVIDER_available(OSSL_LIB_CTX *libctx, const char *name)
1377 {
1378 OSSL_PROVIDER *prov = NULL;
1379 int available = 0;
1380 struct provider_store_st *store = get_provider_store(libctx);
1381
1382 if (store == NULL || !provider_activate_fallbacks(store))
1383 return 0;
1384
1385 prov = ossl_provider_find(libctx, name, 0);
1386 if (prov != NULL) {
1387 if (!CRYPTO_THREAD_read_lock(prov->flag_lock))
1388 return 0;
1389 available = prov->flag_activated;
1390 CRYPTO_THREAD_unlock(prov->flag_lock);
1391 ossl_provider_free(prov);
1392 }
1393 return available;
1394 }
1395
1396 /* Setters of Provider Object data */
ossl_provider_set_fallback(OSSL_PROVIDER * prov)1397 int ossl_provider_set_fallback(OSSL_PROVIDER *prov)
1398 {
1399 if (prov == NULL)
1400 return 0;
1401
1402 prov->flag_fallback = 1;
1403 return 1;
1404 }
1405
1406 /* Getters of Provider Object data */
ossl_provider_name(const OSSL_PROVIDER * prov)1407 const char *ossl_provider_name(const OSSL_PROVIDER *prov)
1408 {
1409 return prov->name;
1410 }
1411
ossl_provider_dso(const OSSL_PROVIDER * prov)1412 const DSO *ossl_provider_dso(const OSSL_PROVIDER *prov)
1413 {
1414 return prov->module;
1415 }
1416
ossl_provider_module_name(const OSSL_PROVIDER * prov)1417 const char *ossl_provider_module_name(const OSSL_PROVIDER *prov)
1418 {
1419 #ifdef FIPS_MODULE
1420 return NULL;
1421 #else
1422 return DSO_get_filename(prov->module);
1423 #endif
1424 }
1425
ossl_provider_module_path(const OSSL_PROVIDER * prov)1426 const char *ossl_provider_module_path(const OSSL_PROVIDER *prov)
1427 {
1428 #ifdef FIPS_MODULE
1429 return NULL;
1430 #else
1431 /* FIXME: Ensure it's a full path */
1432 return DSO_get_filename(prov->module);
1433 #endif
1434 }
1435
ossl_provider_prov_ctx(const OSSL_PROVIDER * prov)1436 void *ossl_provider_prov_ctx(const OSSL_PROVIDER *prov)
1437 {
1438 if (prov != NULL)
1439 return prov->provctx;
1440
1441 return NULL;
1442 }
1443
ossl_provider_get0_dispatch(const OSSL_PROVIDER * prov)1444 const OSSL_DISPATCH *ossl_provider_get0_dispatch(const OSSL_PROVIDER *prov)
1445 {
1446 if (prov != NULL)
1447 return prov->dispatch;
1448
1449 return NULL;
1450 }
1451
ossl_provider_libctx(const OSSL_PROVIDER * prov)1452 OSSL_LIB_CTX *ossl_provider_libctx(const OSSL_PROVIDER *prov)
1453 {
1454 return prov != NULL ? prov->libctx : NULL;
1455 }
1456
1457 /* Wrappers around calls to the provider */
ossl_provider_teardown(const OSSL_PROVIDER * prov)1458 void ossl_provider_teardown(const OSSL_PROVIDER *prov)
1459 {
1460 if (prov->teardown != NULL
1461 #ifndef FIPS_MODULE
1462 && !prov->ischild
1463 #endif
1464 )
1465 prov->teardown(prov->provctx);
1466 }
1467
ossl_provider_gettable_params(const OSSL_PROVIDER * prov)1468 const OSSL_PARAM *ossl_provider_gettable_params(const OSSL_PROVIDER *prov)
1469 {
1470 return prov->gettable_params == NULL
1471 ? NULL : prov->gettable_params(prov->provctx);
1472 }
1473
ossl_provider_get_params(const OSSL_PROVIDER * prov,OSSL_PARAM params[])1474 int ossl_provider_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
1475 {
1476 return prov->get_params == NULL
1477 ? 0 : prov->get_params(prov->provctx, params);
1478 }
1479
ossl_provider_self_test(const OSSL_PROVIDER * prov)1480 int ossl_provider_self_test(const OSSL_PROVIDER *prov)
1481 {
1482 int ret;
1483
1484 if (prov->self_test == NULL)
1485 return 1;
1486 ret = prov->self_test(prov->provctx);
1487 if (ret == 0)
1488 (void)provider_flush_store_cache(prov);
1489 return ret;
1490 }
1491
ossl_provider_get_capabilities(const OSSL_PROVIDER * prov,const char * capability,OSSL_CALLBACK * cb,void * arg)1492 int ossl_provider_get_capabilities(const OSSL_PROVIDER *prov,
1493 const char *capability,
1494 OSSL_CALLBACK *cb,
1495 void *arg)
1496 {
1497 return prov->get_capabilities == NULL
1498 ? 1 : prov->get_capabilities(prov->provctx, capability, cb, arg);
1499 }
1500
ossl_provider_query_operation(const OSSL_PROVIDER * prov,int operation_id,int * no_cache)1501 const OSSL_ALGORITHM *ossl_provider_query_operation(const OSSL_PROVIDER *prov,
1502 int operation_id,
1503 int *no_cache)
1504 {
1505 const OSSL_ALGORITHM *res;
1506
1507 if (prov->query_operation == NULL)
1508 return NULL;
1509 res = prov->query_operation(prov->provctx, operation_id, no_cache);
1510 #if defined(OPENSSL_NO_CACHED_FETCH)
1511 /* Forcing the non-caching of queries */
1512 if (no_cache != NULL)
1513 *no_cache = 1;
1514 #endif
1515 return res;
1516 }
1517
ossl_provider_unquery_operation(const OSSL_PROVIDER * prov,int operation_id,const OSSL_ALGORITHM * algs)1518 void ossl_provider_unquery_operation(const OSSL_PROVIDER *prov,
1519 int operation_id,
1520 const OSSL_ALGORITHM *algs)
1521 {
1522 if (prov->unquery_operation != NULL)
1523 prov->unquery_operation(prov->provctx, operation_id, algs);
1524 }
1525
ossl_provider_clear_all_operation_bits(OSSL_LIB_CTX * libctx)1526 int ossl_provider_clear_all_operation_bits(OSSL_LIB_CTX *libctx)
1527 {
1528 struct provider_store_st *store;
1529 OSSL_PROVIDER *provider;
1530 int i, num, res = 1;
1531
1532 if ((store = get_provider_store(libctx)) != NULL) {
1533 if (!CRYPTO_THREAD_read_lock(store->lock))
1534 return 0;
1535 num = sk_OSSL_PROVIDER_num(store->providers);
1536 for (i = 0; i < num; i++) {
1537 provider = sk_OSSL_PROVIDER_value(store->providers, i);
1538 if (!CRYPTO_THREAD_write_lock(provider->opbits_lock)) {
1539 res = 0;
1540 continue;
1541 }
1542 if (provider->operation_bits != NULL)
1543 memset(provider->operation_bits, 0,
1544 provider->operation_bits_sz);
1545 CRYPTO_THREAD_unlock(provider->opbits_lock);
1546 }
1547 CRYPTO_THREAD_unlock(store->lock);
1548 return res;
1549 }
1550 return 0;
1551 }
1552
ossl_provider_set_operation_bit(OSSL_PROVIDER * provider,size_t bitnum)1553 int ossl_provider_set_operation_bit(OSSL_PROVIDER *provider, size_t bitnum)
1554 {
1555 size_t byte = bitnum / 8;
1556 unsigned char bit = (1 << (bitnum % 8)) & 0xFF;
1557
1558 if (!CRYPTO_THREAD_write_lock(provider->opbits_lock))
1559 return 0;
1560 if (provider->operation_bits_sz <= byte) {
1561 unsigned char *tmp = OPENSSL_realloc(provider->operation_bits,
1562 byte + 1);
1563
1564 if (tmp == NULL) {
1565 CRYPTO_THREAD_unlock(provider->opbits_lock);
1566 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
1567 return 0;
1568 }
1569 provider->operation_bits = tmp;
1570 memset(provider->operation_bits + provider->operation_bits_sz,
1571 '\0', byte + 1 - provider->operation_bits_sz);
1572 provider->operation_bits_sz = byte + 1;
1573 }
1574 provider->operation_bits[byte] |= bit;
1575 CRYPTO_THREAD_unlock(provider->opbits_lock);
1576 return 1;
1577 }
1578
ossl_provider_test_operation_bit(OSSL_PROVIDER * provider,size_t bitnum,int * result)1579 int ossl_provider_test_operation_bit(OSSL_PROVIDER *provider, size_t bitnum,
1580 int *result)
1581 {
1582 size_t byte = bitnum / 8;
1583 unsigned char bit = (1 << (bitnum % 8)) & 0xFF;
1584
1585 if (!ossl_assert(result != NULL)) {
1586 ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
1587 return 0;
1588 }
1589
1590 *result = 0;
1591 if (!CRYPTO_THREAD_read_lock(provider->opbits_lock))
1592 return 0;
1593 if (provider->operation_bits_sz > byte)
1594 *result = ((provider->operation_bits[byte] & bit) != 0);
1595 CRYPTO_THREAD_unlock(provider->opbits_lock);
1596 return 1;
1597 }
1598
1599 #ifndef FIPS_MODULE
ossl_provider_get_parent(OSSL_PROVIDER * prov)1600 const OSSL_CORE_HANDLE *ossl_provider_get_parent(OSSL_PROVIDER *prov)
1601 {
1602 return prov->handle;
1603 }
1604
ossl_provider_is_child(const OSSL_PROVIDER * prov)1605 int ossl_provider_is_child(const OSSL_PROVIDER *prov)
1606 {
1607 return prov->ischild;
1608 }
1609
ossl_provider_set_child(OSSL_PROVIDER * prov,const OSSL_CORE_HANDLE * handle)1610 int ossl_provider_set_child(OSSL_PROVIDER *prov, const OSSL_CORE_HANDLE *handle)
1611 {
1612 prov->handle = handle;
1613 prov->ischild = 1;
1614
1615 return 1;
1616 }
1617
ossl_provider_default_props_update(OSSL_LIB_CTX * libctx,const char * props)1618 int ossl_provider_default_props_update(OSSL_LIB_CTX *libctx, const char *props)
1619 {
1620 #ifndef FIPS_MODULE
1621 struct provider_store_st *store = NULL;
1622 int i, max;
1623 OSSL_PROVIDER_CHILD_CB *child_cb;
1624
1625 if ((store = get_provider_store(libctx)) == NULL)
1626 return 0;
1627
1628 if (!CRYPTO_THREAD_read_lock(store->lock))
1629 return 0;
1630
1631 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1632 for (i = 0; i < max; i++) {
1633 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1634 child_cb->global_props_cb(props, child_cb->cbdata);
1635 }
1636
1637 CRYPTO_THREAD_unlock(store->lock);
1638 #endif
1639 return 1;
1640 }
1641
ossl_provider_register_child_cb(const OSSL_CORE_HANDLE * handle,int (* create_cb)(const OSSL_CORE_HANDLE * provider,void * cbdata),int (* remove_cb)(const OSSL_CORE_HANDLE * provider,void * cbdata),int (* global_props_cb)(const char * props,void * cbdata),void * cbdata)1642 static int ossl_provider_register_child_cb(const OSSL_CORE_HANDLE *handle,
1643 int (*create_cb)(
1644 const OSSL_CORE_HANDLE *provider,
1645 void *cbdata),
1646 int (*remove_cb)(
1647 const OSSL_CORE_HANDLE *provider,
1648 void *cbdata),
1649 int (*global_props_cb)(
1650 const char *props,
1651 void *cbdata),
1652 void *cbdata)
1653 {
1654 /*
1655 * This is really an OSSL_PROVIDER that we created and cast to
1656 * OSSL_CORE_HANDLE originally. Therefore it is safe to cast it back.
1657 */
1658 OSSL_PROVIDER *thisprov = (OSSL_PROVIDER *)handle;
1659 OSSL_PROVIDER *prov;
1660 OSSL_LIB_CTX *libctx = thisprov->libctx;
1661 struct provider_store_st *store = NULL;
1662 int ret = 0, i, max;
1663 OSSL_PROVIDER_CHILD_CB *child_cb;
1664 char *propsstr = NULL;
1665
1666 if ((store = get_provider_store(libctx)) == NULL)
1667 return 0;
1668
1669 child_cb = OPENSSL_malloc(sizeof(*child_cb));
1670 if (child_cb == NULL)
1671 return 0;
1672 child_cb->prov = thisprov;
1673 child_cb->create_cb = create_cb;
1674 child_cb->remove_cb = remove_cb;
1675 child_cb->global_props_cb = global_props_cb;
1676 child_cb->cbdata = cbdata;
1677
1678 if (!CRYPTO_THREAD_write_lock(store->lock)) {
1679 OPENSSL_free(child_cb);
1680 return 0;
1681 }
1682 propsstr = evp_get_global_properties_str(libctx, 0);
1683
1684 if (propsstr != NULL) {
1685 global_props_cb(propsstr, cbdata);
1686 OPENSSL_free(propsstr);
1687 }
1688 max = sk_OSSL_PROVIDER_num(store->providers);
1689 for (i = 0; i < max; i++) {
1690 int activated;
1691
1692 prov = sk_OSSL_PROVIDER_value(store->providers, i);
1693
1694 if (!CRYPTO_THREAD_read_lock(prov->flag_lock))
1695 break;
1696 activated = prov->flag_activated;
1697 CRYPTO_THREAD_unlock(prov->flag_lock);
1698 /*
1699 * We hold the store lock while calling the user callback. This means
1700 * that the user callback must be short and simple and not do anything
1701 * likely to cause a deadlock. We don't hold the flag_lock during this
1702 * call. In theory this means that another thread could deactivate it
1703 * while we are calling create. This is ok because the other thread
1704 * will also call remove_cb, but won't be able to do so until we release
1705 * the store lock.
1706 */
1707 if (activated && !create_cb((OSSL_CORE_HANDLE *)prov, cbdata))
1708 break;
1709 }
1710 if (i == max) {
1711 /* Success */
1712 ret = sk_OSSL_PROVIDER_CHILD_CB_push(store->child_cbs, child_cb);
1713 }
1714 if (i != max || ret <= 0) {
1715 /* Failed during creation. Remove everything we just added */
1716 for (; i >= 0; i--) {
1717 prov = sk_OSSL_PROVIDER_value(store->providers, i);
1718 remove_cb((OSSL_CORE_HANDLE *)prov, cbdata);
1719 }
1720 OPENSSL_free(child_cb);
1721 ret = 0;
1722 }
1723 CRYPTO_THREAD_unlock(store->lock);
1724
1725 return ret;
1726 }
1727
ossl_provider_deregister_child_cb(const OSSL_CORE_HANDLE * handle)1728 static void ossl_provider_deregister_child_cb(const OSSL_CORE_HANDLE *handle)
1729 {
1730 /*
1731 * This is really an OSSL_PROVIDER that we created and cast to
1732 * OSSL_CORE_HANDLE originally. Therefore it is safe to cast it back.
1733 */
1734 OSSL_PROVIDER *thisprov = (OSSL_PROVIDER *)handle;
1735 OSSL_LIB_CTX *libctx = thisprov->libctx;
1736 struct provider_store_st *store = NULL;
1737 int i, max;
1738 OSSL_PROVIDER_CHILD_CB *child_cb;
1739
1740 if ((store = get_provider_store(libctx)) == NULL)
1741 return;
1742
1743 if (!CRYPTO_THREAD_write_lock(store->lock))
1744 return;
1745 max = sk_OSSL_PROVIDER_CHILD_CB_num(store->child_cbs);
1746 for (i = 0; i < max; i++) {
1747 child_cb = sk_OSSL_PROVIDER_CHILD_CB_value(store->child_cbs, i);
1748 if (child_cb->prov == thisprov) {
1749 /* Found an entry */
1750 sk_OSSL_PROVIDER_CHILD_CB_delete(store->child_cbs, i);
1751 OPENSSL_free(child_cb);
1752 break;
1753 }
1754 }
1755 CRYPTO_THREAD_unlock(store->lock);
1756 }
1757 #endif
1758
1759 /*-
1760 * Core functions for the provider
1761 * ===============================
1762 *
1763 * This is the set of functions that the core makes available to the provider
1764 */
1765
1766 /*
1767 * This returns a list of Provider Object parameters with their types, for
1768 * discovery. We do not expect that many providers will use this, but one
1769 * never knows.
1770 */
1771 static const OSSL_PARAM param_types[] = {
1772 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_VERSION, OSSL_PARAM_UTF8_PTR, NULL, 0),
1773 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_PROV_NAME, OSSL_PARAM_UTF8_PTR,
1774 NULL, 0),
1775 #ifndef FIPS_MODULE
1776 OSSL_PARAM_DEFN(OSSL_PROV_PARAM_CORE_MODULE_FILENAME, OSSL_PARAM_UTF8_PTR,
1777 NULL, 0),
1778 #endif
1779 OSSL_PARAM_END
1780 };
1781
1782 /*
1783 * Forward declare all the functions that are provided aa dispatch.
1784 * This ensures that the compiler will complain if they aren't defined
1785 * with the correct signature.
1786 */
1787 static OSSL_FUNC_core_gettable_params_fn core_gettable_params;
1788 static OSSL_FUNC_core_get_params_fn core_get_params;
1789 static OSSL_FUNC_core_thread_start_fn core_thread_start;
1790 static OSSL_FUNC_core_get_libctx_fn core_get_libctx;
1791 #ifndef FIPS_MODULE
1792 static OSSL_FUNC_core_new_error_fn core_new_error;
1793 static OSSL_FUNC_core_set_error_debug_fn core_set_error_debug;
1794 static OSSL_FUNC_core_vset_error_fn core_vset_error;
1795 static OSSL_FUNC_core_set_error_mark_fn core_set_error_mark;
1796 static OSSL_FUNC_core_clear_last_error_mark_fn core_clear_last_error_mark;
1797 static OSSL_FUNC_core_pop_error_to_mark_fn core_pop_error_to_mark;
1798 static OSSL_FUNC_core_obj_add_sigid_fn core_obj_add_sigid;
1799 static OSSL_FUNC_core_obj_create_fn core_obj_create;
1800 #endif
1801
core_gettable_params(const OSSL_CORE_HANDLE * handle)1802 static const OSSL_PARAM *core_gettable_params(const OSSL_CORE_HANDLE *handle)
1803 {
1804 return param_types;
1805 }
1806
core_get_params(const OSSL_CORE_HANDLE * handle,OSSL_PARAM params[])1807 static int core_get_params(const OSSL_CORE_HANDLE *handle, OSSL_PARAM params[])
1808 {
1809 int i;
1810 OSSL_PARAM *p;
1811 /*
1812 * We created this object originally and we know it is actually an
1813 * OSSL_PROVIDER *, so the cast is safe
1814 */
1815 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1816
1817 if ((p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_CORE_VERSION)) != NULL)
1818 OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR);
1819 if ((p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_CORE_PROV_NAME)) != NULL)
1820 OSSL_PARAM_set_utf8_ptr(p, prov->name);
1821
1822 #ifndef FIPS_MODULE
1823 if ((p = OSSL_PARAM_locate(params,
1824 OSSL_PROV_PARAM_CORE_MODULE_FILENAME)) != NULL)
1825 OSSL_PARAM_set_utf8_ptr(p, ossl_provider_module_path(prov));
1826 #endif
1827
1828 if (prov->parameters == NULL)
1829 return 1;
1830
1831 for (i = 0; i < sk_INFOPAIR_num(prov->parameters); i++) {
1832 INFOPAIR *pair = sk_INFOPAIR_value(prov->parameters, i);
1833
1834 if ((p = OSSL_PARAM_locate(params, pair->name)) != NULL)
1835 OSSL_PARAM_set_utf8_ptr(p, pair->value);
1836 }
1837 return 1;
1838 }
1839
core_get_libctx(const OSSL_CORE_HANDLE * handle)1840 static OPENSSL_CORE_CTX *core_get_libctx(const OSSL_CORE_HANDLE *handle)
1841 {
1842 /*
1843 * We created this object originally and we know it is actually an
1844 * OSSL_PROVIDER *, so the cast is safe
1845 */
1846 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1847
1848 /*
1849 * Using ossl_provider_libctx would be wrong as that returns
1850 * NULL for |prov| == NULL and NULL libctx has a special meaning
1851 * that does not apply here. Here |prov| == NULL can happen only in
1852 * case of a coding error.
1853 */
1854 assert(prov != NULL);
1855 return (OPENSSL_CORE_CTX *)prov->libctx;
1856 }
1857
core_thread_start(const OSSL_CORE_HANDLE * handle,OSSL_thread_stop_handler_fn handfn,void * arg)1858 static int core_thread_start(const OSSL_CORE_HANDLE *handle,
1859 OSSL_thread_stop_handler_fn handfn,
1860 void *arg)
1861 {
1862 /*
1863 * We created this object originally and we know it is actually an
1864 * OSSL_PROVIDER *, so the cast is safe
1865 */
1866 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1867
1868 return ossl_init_thread_start(prov, arg, handfn);
1869 }
1870
1871 /*
1872 * The FIPS module inner provider doesn't implement these. They aren't
1873 * needed there, since the FIPS module upcalls are always the outer provider
1874 * ones.
1875 */
1876 #ifndef FIPS_MODULE
1877 /*
1878 * These error functions should use |handle| to select the proper
1879 * library context to report in the correct error stack if error
1880 * stacks become tied to the library context.
1881 * We cannot currently do that since there's no support for it in the
1882 * ERR subsystem.
1883 */
core_new_error(const OSSL_CORE_HANDLE * handle)1884 static void core_new_error(const OSSL_CORE_HANDLE *handle)
1885 {
1886 ERR_new();
1887 }
1888
core_set_error_debug(const OSSL_CORE_HANDLE * handle,const char * file,int line,const char * func)1889 static void core_set_error_debug(const OSSL_CORE_HANDLE *handle,
1890 const char *file, int line, const char *func)
1891 {
1892 ERR_set_debug(file, line, func);
1893 }
1894
core_vset_error(const OSSL_CORE_HANDLE * handle,uint32_t reason,const char * fmt,va_list args)1895 static void core_vset_error(const OSSL_CORE_HANDLE *handle,
1896 uint32_t reason, const char *fmt, va_list args)
1897 {
1898 /*
1899 * We created this object originally and we know it is actually an
1900 * OSSL_PROVIDER *, so the cast is safe
1901 */
1902 OSSL_PROVIDER *prov = (OSSL_PROVIDER *)handle;
1903
1904 /*
1905 * If the uppermost 8 bits are non-zero, it's an OpenSSL library
1906 * error and will be treated as such. Otherwise, it's a new style
1907 * provider error and will be treated as such.
1908 */
1909 if (ERR_GET_LIB(reason) != 0) {
1910 ERR_vset_error(ERR_GET_LIB(reason), ERR_GET_REASON(reason), fmt, args);
1911 } else {
1912 ERR_vset_error(prov->error_lib, (int)reason, fmt, args);
1913 }
1914 }
1915
core_set_error_mark(const OSSL_CORE_HANDLE * handle)1916 static int core_set_error_mark(const OSSL_CORE_HANDLE *handle)
1917 {
1918 return ERR_set_mark();
1919 }
1920
core_clear_last_error_mark(const OSSL_CORE_HANDLE * handle)1921 static int core_clear_last_error_mark(const OSSL_CORE_HANDLE *handle)
1922 {
1923 return ERR_clear_last_mark();
1924 }
1925
core_pop_error_to_mark(const OSSL_CORE_HANDLE * handle)1926 static int core_pop_error_to_mark(const OSSL_CORE_HANDLE *handle)
1927 {
1928 return ERR_pop_to_mark();
1929 }
1930
core_obj_add_sigid(const OSSL_CORE_HANDLE * prov,const char * sign_name,const char * digest_name,const char * pkey_name)1931 static int core_obj_add_sigid(const OSSL_CORE_HANDLE *prov,
1932 const char *sign_name, const char *digest_name,
1933 const char *pkey_name)
1934 {
1935 int sign_nid = OBJ_txt2nid(sign_name);
1936 int digest_nid = OBJ_txt2nid(digest_name);
1937 int pkey_nid = OBJ_txt2nid(pkey_name);
1938
1939 if (sign_nid == NID_undef)
1940 return 0;
1941
1942 /*
1943 * Check if it already exists. This is a success if so (even if we don't
1944 * have nids for the digest/pkey)
1945 */
1946 if (OBJ_find_sigid_algs(sign_nid, NULL, NULL))
1947 return 1;
1948
1949 if (digest_nid == NID_undef
1950 || pkey_nid == NID_undef)
1951 return 0;
1952
1953 return OBJ_add_sigid(sign_nid, digest_nid, pkey_nid);
1954 }
1955
core_obj_create(const OSSL_CORE_HANDLE * prov,const char * oid,const char * sn,const char * ln)1956 static int core_obj_create(const OSSL_CORE_HANDLE *prov, const char *oid,
1957 const char *sn, const char *ln)
1958 {
1959 /* Check if it already exists and create it if not */
1960 return OBJ_txt2nid(oid) != NID_undef
1961 || OBJ_create(oid, sn, ln) != NID_undef;
1962 }
1963 #endif /* FIPS_MODULE */
1964
1965 /*
1966 * Functions provided by the core.
1967 */
1968 static const OSSL_DISPATCH core_dispatch_[] = {
1969 { OSSL_FUNC_CORE_GETTABLE_PARAMS, (void (*)(void))core_gettable_params },
1970 { OSSL_FUNC_CORE_GET_PARAMS, (void (*)(void))core_get_params },
1971 { OSSL_FUNC_CORE_GET_LIBCTX, (void (*)(void))core_get_libctx },
1972 { OSSL_FUNC_CORE_THREAD_START, (void (*)(void))core_thread_start },
1973 #ifndef FIPS_MODULE
1974 { OSSL_FUNC_CORE_NEW_ERROR, (void (*)(void))core_new_error },
1975 { OSSL_FUNC_CORE_SET_ERROR_DEBUG, (void (*)(void))core_set_error_debug },
1976 { OSSL_FUNC_CORE_VSET_ERROR, (void (*)(void))core_vset_error },
1977 { OSSL_FUNC_CORE_SET_ERROR_MARK, (void (*)(void))core_set_error_mark },
1978 { OSSL_FUNC_CORE_CLEAR_LAST_ERROR_MARK,
1979 (void (*)(void))core_clear_last_error_mark },
1980 { OSSL_FUNC_CORE_POP_ERROR_TO_MARK, (void (*)(void))core_pop_error_to_mark },
1981 { OSSL_FUNC_BIO_NEW_FILE, (void (*)(void))ossl_core_bio_new_file },
1982 { OSSL_FUNC_BIO_NEW_MEMBUF, (void (*)(void))ossl_core_bio_new_mem_buf },
1983 { OSSL_FUNC_BIO_READ_EX, (void (*)(void))ossl_core_bio_read_ex },
1984 { OSSL_FUNC_BIO_WRITE_EX, (void (*)(void))ossl_core_bio_write_ex },
1985 { OSSL_FUNC_BIO_GETS, (void (*)(void))ossl_core_bio_gets },
1986 { OSSL_FUNC_BIO_PUTS, (void (*)(void))ossl_core_bio_puts },
1987 { OSSL_FUNC_BIO_CTRL, (void (*)(void))ossl_core_bio_ctrl },
1988 { OSSL_FUNC_BIO_UP_REF, (void (*)(void))ossl_core_bio_up_ref },
1989 { OSSL_FUNC_BIO_FREE, (void (*)(void))ossl_core_bio_free },
1990 { OSSL_FUNC_BIO_VPRINTF, (void (*)(void))ossl_core_bio_vprintf },
1991 { OSSL_FUNC_BIO_VSNPRINTF, (void (*)(void))BIO_vsnprintf },
1992 { OSSL_FUNC_SELF_TEST_CB, (void (*)(void))OSSL_SELF_TEST_get_callback },
1993 { OSSL_FUNC_GET_ENTROPY, (void (*)(void))ossl_rand_get_entropy },
1994 { OSSL_FUNC_CLEANUP_ENTROPY, (void (*)(void))ossl_rand_cleanup_entropy },
1995 { OSSL_FUNC_GET_NONCE, (void (*)(void))ossl_rand_get_nonce },
1996 { OSSL_FUNC_CLEANUP_NONCE, (void (*)(void))ossl_rand_cleanup_nonce },
1997 #endif
1998 { OSSL_FUNC_CRYPTO_MALLOC, (void (*)(void))CRYPTO_malloc },
1999 { OSSL_FUNC_CRYPTO_ZALLOC, (void (*)(void))CRYPTO_zalloc },
2000 { OSSL_FUNC_CRYPTO_FREE, (void (*)(void))CRYPTO_free },
2001 { OSSL_FUNC_CRYPTO_CLEAR_FREE, (void (*)(void))CRYPTO_clear_free },
2002 { OSSL_FUNC_CRYPTO_REALLOC, (void (*)(void))CRYPTO_realloc },
2003 { OSSL_FUNC_CRYPTO_CLEAR_REALLOC, (void (*)(void))CRYPTO_clear_realloc },
2004 { OSSL_FUNC_CRYPTO_SECURE_MALLOC, (void (*)(void))CRYPTO_secure_malloc },
2005 { OSSL_FUNC_CRYPTO_SECURE_ZALLOC, (void (*)(void))CRYPTO_secure_zalloc },
2006 { OSSL_FUNC_CRYPTO_SECURE_FREE, (void (*)(void))CRYPTO_secure_free },
2007 { OSSL_FUNC_CRYPTO_SECURE_CLEAR_FREE,
2008 (void (*)(void))CRYPTO_secure_clear_free },
2009 { OSSL_FUNC_CRYPTO_SECURE_ALLOCATED,
2010 (void (*)(void))CRYPTO_secure_allocated },
2011 { OSSL_FUNC_OPENSSL_CLEANSE, (void (*)(void))OPENSSL_cleanse },
2012 #ifndef FIPS_MODULE
2013 { OSSL_FUNC_PROVIDER_REGISTER_CHILD_CB,
2014 (void (*)(void))ossl_provider_register_child_cb },
2015 { OSSL_FUNC_PROVIDER_DEREGISTER_CHILD_CB,
2016 (void (*)(void))ossl_provider_deregister_child_cb },
2017 { OSSL_FUNC_PROVIDER_NAME,
2018 (void (*)(void))OSSL_PROVIDER_get0_name },
2019 { OSSL_FUNC_PROVIDER_GET0_PROVIDER_CTX,
2020 (void (*)(void))OSSL_PROVIDER_get0_provider_ctx },
2021 { OSSL_FUNC_PROVIDER_GET0_DISPATCH,
2022 (void (*)(void))OSSL_PROVIDER_get0_dispatch },
2023 { OSSL_FUNC_PROVIDER_UP_REF,
2024 (void (*)(void))provider_up_ref_intern },
2025 { OSSL_FUNC_PROVIDER_FREE,
2026 (void (*)(void))provider_free_intern },
2027 { OSSL_FUNC_CORE_OBJ_ADD_SIGID, (void (*)(void))core_obj_add_sigid },
2028 { OSSL_FUNC_CORE_OBJ_CREATE, (void (*)(void))core_obj_create },
2029 #endif
2030 { 0, NULL }
2031 };
2032 static const OSSL_DISPATCH *core_dispatch = core_dispatch_;
2033