#include <openssl/core_numbers.h>
#include <openssl/opensslv.h>
#include "internal/cryptlib.h"
+#include "internal/nelem.h"
#include "internal/thread_once.h"
#include "internal/provider.h"
#include "internal/refcount.h"
+#include "provider_local.h"
+
+static OSSL_PROVIDER *provider_new(const char *name,
+ OSSL_provider_init_fn *init_function);
/*-
* Provider Object structure
struct ossl_provider_st {
/* Flag bits */
unsigned int flag_initialized:1;
+ unsigned int flag_fallback:1;
/* OpenSSL library side data */
CRYPTO_REF_COUNT refcnt;
-#ifndef HAVE_ATOMICS
- CRYPTO_RWLOCK refcnt_lock; /* For the ref counter */
-#endif
+ CRYPTO_RWLOCK *refcnt_lock; /* For the ref counter */
char *name;
DSO *module;
OSSL_provider_init_fn *init_function;
+ struct provider_store_st *store; /* The store this instance belongs to */
/* Provider side functions */
OSSL_provider_teardown_fn *teardown;
OSSL_provider_get_param_types_fn *get_param_types;
OSSL_provider_get_params_fn *get_params;
+ OSSL_provider_query_operation_fn *query_operation;
};
DEFINE_STACK_OF(OSSL_PROVIDER)
struct provider_store_st {
STACK_OF(OSSL_PROVIDER) *providers;
CRYPTO_RWLOCK *lock;
+ unsigned int use_fallbacks:1;
};
static int provider_store_index = -1;
static void *provider_store_new(void)
{
struct provider_store_st *store = OPENSSL_zalloc(sizeof(*store));
+ const struct predefined_providers_st *p = NULL;
if (store == NULL
|| (store->providers = sk_OSSL_PROVIDER_new(ossl_provider_cmp)) == NULL
|| (store->lock = CRYPTO_THREAD_lock_new()) == NULL) {
provider_store_free(store);
- store = NULL;
+ return NULL;
+ }
+ store->use_fallbacks = 1;
+
+ for (p = predefined_providers; p->name != NULL; p++) {
+ OSSL_PROVIDER *prov = NULL;
+
+ /*
+ * We use the internal constructor directly here,
+ * otherwise we get a call loop
+ */
+ prov = provider_new(p->name, p->init);
+
+ if (prov == NULL
+ || sk_OSSL_PROVIDER_push(store->providers, prov) == 0) {
+ ossl_provider_free(prov);
+ provider_store_free(store);
+ CRYPTOerr(CRYPTO_F_PROVIDER_STORE_NEW, ERR_R_INTERNAL_ERROR);
+ return NULL;
+ }
+ prov->store = store;
+ if(p->is_fallback)
+ ossl_provider_set_fallback(prov);
}
+
return store;
}
return store;
}
-/*-
- * Provider Object methods
- * =======================
- */
-
-int ossl_provider_upref(OSSL_PROVIDER *prov)
-{
- int ref = 0;
-
-#ifndef HAVE_ATOMICS
- CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock);
-#else
- CRYPTO_UP_REF(&prov->refcnt, &ref, NULL);
-#endif
- return ref;
-}
-
-/* Finder, constructor and destructor */
OSSL_PROVIDER *ossl_provider_find(OPENSSL_CTX *libctx, const char *name)
{
struct provider_store_st *store = NULL;
return prov;
}
+/*-
+ * Provider Object methods
+ * =======================
+ */
+
+static OSSL_PROVIDER *provider_new(const char *name,
+ OSSL_provider_init_fn *init_function)
+{
+ OSSL_PROVIDER *prov = NULL;
+
+ if ((prov = OPENSSL_zalloc(sizeof(*prov))) == NULL
+#ifndef HAVE_ATOMICS
+ || (prov->refcnt_lock = CRYPTO_THREAD_lock_new()) == NULL
+#endif
+ || !ossl_provider_upref(prov) /* +1 One reference to be returned */
+ || (prov->name = OPENSSL_strdup(name)) == NULL) {
+ ossl_provider_free(prov);
+ CRYPTOerr(CRYPTO_F_PROVIDER_NEW, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ prov->init_function = init_function;
+ return prov;
+}
+
+int ossl_provider_upref(OSSL_PROVIDER *prov)
+{
+ int ref = 0;
+
+ CRYPTO_UP_REF(&prov->refcnt, &ref, prov->refcnt_lock);
+ return ref;
+}
+
OSSL_PROVIDER *ossl_provider_new(OPENSSL_CTX *libctx, const char *name,
OSSL_provider_init_fn *init_function)
{
return NULL;
}
- if ((prov = OPENSSL_zalloc(sizeof(*prov))) == NULL
- || !ossl_provider_upref(prov) /* +1 One reference to be returned */
- || (prov->name = OPENSSL_strdup(name)) == NULL) {
- ossl_provider_free(prov);
- CRYPTOerr(CRYPTO_F_OSSL_PROVIDER_NEW, ERR_R_MALLOC_FAILURE);
+ /* provider_new() generates an error, so no need here */
+ if ((prov = provider_new(name, init_function)) == NULL)
return NULL;
- }
-
- prov->init_function = init_function;
CRYPTO_THREAD_write_lock(store->lock);
if (!ossl_provider_upref(prov)) { /* +1 One reference for the store */
ossl_provider_free(prov); /* -1 Store reference */
ossl_provider_free(prov); /* -1 Reference that was to be returned */
prov = NULL;
+ } else {
+ prov->store = store;
}
CRYPTO_THREAD_unlock(store->lock);
if (prov != NULL) {
int ref = 0;
-#ifndef HAVE_ATOMICS
- CRYPTO_DOWN_REF(&prov->refcnt, &ref, provider_lock);
-#else
- CRYPTO_DOWN_REF(&prov->refcnt, &ref, NULL);
-#endif
+ CRYPTO_DOWN_REF(&prov->refcnt, &ref, prov->refcnt_lock);
/*
- * When the refcount drops down to one, there is only one reference,
- * the store.
+ * When the refcount drops below two, the store is the only
+ * possible reference, or it has already been taken away from
+ * the store (this may happen if a provider was activated
+ * because it's a fallback, but isn't currently used)
* When that happens, the provider is inactivated.
*/
- if (ref == 1 && prov->flag_initialized) {
+ if (ref < 2 && prov->flag_initialized) {
if (prov->teardown != NULL)
prov->teardown();
prov->flag_initialized = 0;
if (ref == 0) {
DSO_free(prov->module);
OPENSSL_free(prov->name);
+#ifndef HAVE_ATOMICS
+ CRYPTO_THREAD_lock_free(prov->refcnt_lock);
+#endif
OPENSSL_free(prov);
}
}
*/
static const OSSL_DISPATCH *core_dispatch; /* Define further down */
-int ossl_provider_activate(OSSL_PROVIDER *prov)
+/*
+ * Internal version that doesn't affect the store flags, and thereby avoid
+ * locking. Direct callers must remember to set the store flags when
+ * appropriate
+ */
+static int provider_activate(OSSL_PROVIDER *prov)
{
const OSSL_DISPATCH *provider_dispatch = NULL;
if (prov->init_function == NULL
|| !prov->init_function(prov, core_dispatch, &provider_dispatch)) {
- CRYPTOerr(CRYPTO_F_OSSL_PROVIDER_ACTIVATE, ERR_R_INIT_FAIL);
+ CRYPTOerr(CRYPTO_F_PROVIDER_ACTIVATE, ERR_R_INIT_FAIL);
ERR_add_error_data(2, "name=", prov->name);
DSO_free(prov->module);
prov->module = NULL;
prov->get_params =
OSSL_get_provider_get_params(provider_dispatch);
break;
+ case OSSL_FUNC_PROVIDER_QUERY_OPERATION:
+ prov->query_operation =
+ OSSL_get_provider_query_operation(provider_dispatch);
+ break;
}
}
return 1;
}
+int ossl_provider_activate(OSSL_PROVIDER *prov)
+{
+ if (provider_activate(prov)) {
+ CRYPTO_THREAD_write_lock(prov->store->lock);
+ prov->store->use_fallbacks = 0;
+ CRYPTO_THREAD_unlock(prov->store->lock);
+ return 1;
+ }
+
+ return 0;
+}
+
+
+static int provider_forall_loaded(struct provider_store_st *store,
+ int *found_activated,
+ int (*cb)(OSSL_PROVIDER *provider,
+ void *cbdata),
+ void *cbdata)
+{
+ int i;
+ int ret = 1;
+ int num_provs = sk_OSSL_PROVIDER_num(store->providers);
+
+ if (found_activated != NULL)
+ *found_activated = 0;
+ for (i = 0; i < num_provs; i++) {
+ OSSL_PROVIDER *prov =
+ sk_OSSL_PROVIDER_value(store->providers, i);
+
+ if (prov->flag_initialized) {
+ if (found_activated != NULL)
+ *found_activated = 1;
+ if (!(ret = cb(prov, cbdata)))
+ break;
+ }
+ }
+
+ return ret;
+}
+
int ossl_provider_forall_loaded(OPENSSL_CTX *ctx,
int (*cb)(OSSL_PROVIDER *provider,
void *cbdata),
struct provider_store_st *store = get_provider_store(ctx);
if (store != NULL) {
+ int found_activated = 0;
+
CRYPTO_THREAD_read_lock(store->lock);
- for (i = 0; i < sk_OSSL_PROVIDER_num(store->providers); i++) {
- OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(store->providers, i);
+ ret = provider_forall_loaded(store, &found_activated, cb, cbdata);
- if (prov->flag_initialized
- && !(ret = cb(prov, cbdata)))
- break;
+ /*
+ * If there's nothing activated ever in this store, try to activate
+ * all fallbacks.
+ */
+ if (!found_activated && store->use_fallbacks) {
+ int num_provs = sk_OSSL_PROVIDER_num(store->providers);
+ int activated_fallback_count = 0;
+
+ for (i = 0; i < num_provs; i++) {
+ OSSL_PROVIDER *prov =
+ sk_OSSL_PROVIDER_value(store->providers, i);
+
+ /*
+ * Note that we don't care if the activation succeeds or
+ * not. If it doesn't succeed, then the next loop will
+ * fail anyway.
+ */
+ if (prov->flag_fallback) {
+ activated_fallback_count++;
+ provider_activate(prov);
+ }
+ }
+
+ if (activated_fallback_count > 0) {
+ /*
+ * We assume that all fallbacks have been added to the store
+ * before any fallback is activated.
+ * TODO: We may have to reconsider this, IF we find ourselves
+ * adding fallbacks after any previous fallback has been
+ * activated.
+ */
+ store->use_fallbacks = 0;
+
+ /*
+ * Now that we've activated available fallbacks, try a
+ * second sweep
+ */
+ ret = provider_forall_loaded(store, NULL, cb, cbdata);
+ }
}
CRYPTO_THREAD_unlock(store->lock);
}
return ret;
}
+/* Setters of Provider Object data */
+int ossl_provider_set_fallback(OSSL_PROVIDER *prov)
+{
+ if (prov == NULL)
+ return 0;
+
+ prov->flag_fallback = 1;
+ return 1;
+}
+
/* Getters of Provider Object data */
const char *ossl_provider_name(OSSL_PROVIDER *prov)
{
return prov->get_params == NULL ? 0 : prov->get_params(prov, params);
}
+
+const OSSL_ALGORITHM *ossl_provider_query_operation(const OSSL_PROVIDER *prov,
+ int operation_id,
+ int *no_cache)
+{
+ return prov->query_operation(prov, operation_id, no_cache);
+}
+
/*-
* Core functions for the provider
* ===============================
projects / openssl.git / blobdiff