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6882652e65
Some data, like the library context, were passed both through higher level callback structures and through arguments to those same higher level callbacks. This is a bit unnecessary, so we rearrange the callback arguments to simply pass that callback structure and rely on the higher level fetching functionality to pick out what data they need from that structure. Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/15750)
137 lines
4.5 KiB
C
137 lines
4.5 KiB
C
/*
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* Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stddef.h>
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#include <openssl/core.h>
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#include "internal/cryptlib.h"
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#include "internal/core.h"
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#include "internal/property.h"
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#include "internal/provider.h"
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struct construct_data_st {
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OSSL_LIB_CTX *libctx;
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OSSL_METHOD_STORE *store;
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int operation_id;
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int force_store;
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OSSL_METHOD_CONSTRUCT_METHOD *mcm;
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void *mcm_data;
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};
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static int ossl_method_construct_precondition(OSSL_PROVIDER *provider,
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int operation_id, void *cbdata,
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int *result)
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{
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if (!ossl_assert(result != NULL)) {
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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if (!ossl_provider_test_operation_bit(provider, operation_id, result))
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return 0;
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/*
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* The result we get tells if methods have already been constructed.
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* However, we want to tell whether construction should happen (true)
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* or not (false), which is the opposite of what we got.
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*/
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*result = !*result;
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return 1;
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}
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static int ossl_method_construct_postcondition(OSSL_PROVIDER *provider,
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int operation_id, int no_store,
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void *cbdata, int *result)
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{
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if (!ossl_assert(result != NULL)) {
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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*result = 1;
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return no_store != 0
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|| ossl_provider_set_operation_bit(provider, operation_id);
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}
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static void ossl_method_construct_this(OSSL_PROVIDER *provider,
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const OSSL_ALGORITHM *algo,
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int no_store, void *cbdata)
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{
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struct construct_data_st *data = cbdata;
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void *method = NULL;
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if ((method = data->mcm->construct(algo, provider, data->mcm_data))
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== NULL)
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return;
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/*
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* Note regarding putting the method in stores:
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*
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* we don't need to care if it actually got in or not here.
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* If it didn't get in, it will simply not be available when
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* ossl_method_construct() tries to get it from the store.
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*
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* It is *expected* that the put function increments the refcnt
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* of the passed method.
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*/
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if (data->force_store || !no_store) {
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/* If we haven't been told not to store, add to the global store */
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data->mcm->put(NULL, method, provider, algo->algorithm_names,
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algo->property_definition, data->mcm_data);
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} else {
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/*
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* If we have been told not to store the method "permanently", we
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* ask for a temporary store, and store the method there.
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* The owner of |data->mcm| is completely responsible for managing
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* that temporary store.
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*/
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if ((data->store = data->mcm->get_tmp_store(data->mcm_data)) == NULL)
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return;
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data->mcm->put(data->store, method, provider, algo->algorithm_names,
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algo->property_definition, data->mcm_data);
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}
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/* refcnt-- because we're dropping the reference */
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data->mcm->destruct(method, data->mcm_data);
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}
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void *ossl_method_construct(OSSL_LIB_CTX *libctx, int operation_id,
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int force_store,
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OSSL_METHOD_CONSTRUCT_METHOD *mcm, void *mcm_data)
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{
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void *method = NULL;
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if ((method = mcm->get(NULL, mcm_data)) == NULL) {
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struct construct_data_st cbdata;
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cbdata.store = NULL;
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cbdata.force_store = force_store;
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cbdata.mcm = mcm;
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cbdata.mcm_data = mcm_data;
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ossl_algorithm_do_all(libctx, operation_id, NULL,
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ossl_method_construct_precondition,
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ossl_method_construct_this,
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ossl_method_construct_postcondition,
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&cbdata);
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/* If there is a temporary store, try there first */
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if (cbdata.store != NULL)
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method = mcm->get(cbdata.store, mcm_data);
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/* If no method was found yet, try the global store */
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if (method == NULL)
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method = mcm->get(NULL, mcm_data);
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}
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return method;
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}
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