a383083194
Fully assume that the method constructors use reference counting. Otherwise, we may leak memory, or loose track and do a double free. Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/8341)
105 lines
3.3 KiB
C
105 lines
3.3 KiB
C
/*
|
|
* 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->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,
|
|
thismap->property_definition,
|
|
method, data->mcm_data);
|
|
}
|
|
|
|
data->mcm->put(data->libctx, data->store,
|
|
thismap->property_definition,
|
|
method, 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, 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()) == 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, propquery, mcm_data);
|
|
mcm->dealloc_tmp_store(cbdata.store);
|
|
}
|
|
|
|
fin:
|
|
return method;
|
|
}
|