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/*
* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stddef.h>
#include <openssl/core.h>
#include "internal/cryptlib.h"
#include "internal/core.h"
#include "internal/property.h"
#include "internal/provider.h"
struct construct_data_st {
OPENSSL_CTX *libctx;
OSSL_METHOD_STORE *store;
int operation_id;
int force_store;
OSSL_METHOD_CONSTRUCT_METHOD *mcm;
void *mcm_data;
};
static int ossl_method_construct_this(OSSL_PROVIDER *provider, void *cbdata)
{
struct construct_data_st *data = cbdata;
int no_store = 0; /* Assume caching is ok */
const OSSL_ALGORITHM *map =
ossl_provider_query_operation(provider, data->operation_id, &no_store);
while (map->algorithm_name != NULL) {
const OSSL_ALGORITHM *thismap = map++;
void *method = NULL;
if ((method = data->mcm->construct(thismap->algorithm_name,
thismap->implementation, provider,
data->mcm_data)) == NULL)
continue;
/*
* Note regarding putting the method in stores:
*
* we don't need to care if it actually got in or not here.
* If it didn't get in, it will simply not be available when
* ossl_method_construct() tries to get it from the store.
*
* It is *expected* that the put function increments the refcnt
* of the passed method.
*/
if (data->force_store || !no_store) {
/*
* If we haven't been told not to store,
* add to the global store
*/
data->mcm->put(data->libctx, NULL, method,
thismap->algorithm_name,
thismap->property_definition, data->mcm_data);
}
data->mcm->put(data->libctx, data->store, method,
thismap->algorithm_name, thismap->property_definition,
data->mcm_data);
/* refcnt-- because we're dropping the reference */
data->mcm->destruct(method, data->mcm_data);
}
return 1;
}
void *ossl_method_construct(OPENSSL_CTX *libctx, int operation_id,
const char *name, const char *propquery,
int force_store,
OSSL_METHOD_CONSTRUCT_METHOD *mcm, void *mcm_data)
{
void *method = NULL;
if ((method =
mcm->get(libctx, NULL, name, propquery, mcm_data)) == NULL) {
struct construct_data_st cbdata;
/*
* We have a temporary store to be able to easily search among new
* items, or items that should find themselves in the global store.
*/
if ((cbdata.store = mcm->alloc_tmp_store(libctx)) == NULL)
goto fin;
cbdata.libctx = libctx;
cbdata.operation_id = operation_id;
cbdata.force_store = force_store;
cbdata.mcm = mcm;
cbdata.mcm_data = mcm_data;
ossl_provider_forall_loaded(libctx, ossl_method_construct_this,
&cbdata);
method = mcm->get(libctx, cbdata.store, name, propquery, mcm_data);
mcm->dealloc_tmp_store(cbdata.store);
}
fin:
return method;
}
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