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- /*
- * Copyright 2022-2023 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 <openssl/evp.h>
- #include <openssl/err.h>
- #include <openssl/core.h>
- #include <openssl/core_dispatch.h>
- #include "internal/provider.h"
- #include "internal/core.h"
- #include "crypto/evp.h"
- #include "evp_local.h"
- static int evp_mac_up_ref(void *vmac)
- {
- EVP_MAC *mac = vmac;
- int ref = 0;
- CRYPTO_UP_REF(&mac->refcnt, &ref);
- return 1;
- }
- static void evp_mac_free(void *vmac)
- {
- EVP_MAC *mac = vmac;
- int ref = 0;
- if (mac == NULL)
- return;
- CRYPTO_DOWN_REF(&mac->refcnt, &ref);
- if (ref > 0)
- return;
- OPENSSL_free(mac->type_name);
- ossl_provider_free(mac->prov);
- CRYPTO_FREE_REF(&mac->refcnt);
- OPENSSL_free(mac);
- }
- static void *evp_mac_new(void)
- {
- EVP_MAC *mac = NULL;
- if ((mac = OPENSSL_zalloc(sizeof(*mac))) == NULL
- || !CRYPTO_NEW_REF(&mac->refcnt, 1)) {
- evp_mac_free(mac);
- return NULL;
- }
- return mac;
- }
- static void *evp_mac_from_algorithm(int name_id,
- const OSSL_ALGORITHM *algodef,
- OSSL_PROVIDER *prov)
- {
- const OSSL_DISPATCH *fns = algodef->implementation;
- EVP_MAC *mac = NULL;
- int fnmaccnt = 0, fnctxcnt = 0;
- if ((mac = evp_mac_new()) == NULL) {
- ERR_raise(ERR_LIB_EVP, ERR_R_EVP_LIB);
- return NULL;
- }
- mac->name_id = name_id;
- if ((mac->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) {
- evp_mac_free(mac);
- return NULL;
- }
- mac->description = algodef->algorithm_description;
- for (; fns->function_id != 0; fns++) {
- switch (fns->function_id) {
- case OSSL_FUNC_MAC_NEWCTX:
- if (mac->newctx != NULL)
- break;
- mac->newctx = OSSL_FUNC_mac_newctx(fns);
- fnctxcnt++;
- break;
- case OSSL_FUNC_MAC_DUPCTX:
- if (mac->dupctx != NULL)
- break;
- mac->dupctx = OSSL_FUNC_mac_dupctx(fns);
- break;
- case OSSL_FUNC_MAC_FREECTX:
- if (mac->freectx != NULL)
- break;
- mac->freectx = OSSL_FUNC_mac_freectx(fns);
- fnctxcnt++;
- break;
- case OSSL_FUNC_MAC_INIT:
- if (mac->init != NULL)
- break;
- mac->init = OSSL_FUNC_mac_init(fns);
- fnmaccnt++;
- break;
- case OSSL_FUNC_MAC_UPDATE:
- if (mac->update != NULL)
- break;
- mac->update = OSSL_FUNC_mac_update(fns);
- fnmaccnt++;
- break;
- case OSSL_FUNC_MAC_FINAL:
- if (mac->final != NULL)
- break;
- mac->final = OSSL_FUNC_mac_final(fns);
- fnmaccnt++;
- break;
- case OSSL_FUNC_MAC_GETTABLE_PARAMS:
- if (mac->gettable_params != NULL)
- break;
- mac->gettable_params =
- OSSL_FUNC_mac_gettable_params(fns);
- break;
- case OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS:
- if (mac->gettable_ctx_params != NULL)
- break;
- mac->gettable_ctx_params =
- OSSL_FUNC_mac_gettable_ctx_params(fns);
- break;
- case OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS:
- if (mac->settable_ctx_params != NULL)
- break;
- mac->settable_ctx_params =
- OSSL_FUNC_mac_settable_ctx_params(fns);
- break;
- case OSSL_FUNC_MAC_GET_PARAMS:
- if (mac->get_params != NULL)
- break;
- mac->get_params = OSSL_FUNC_mac_get_params(fns);
- break;
- case OSSL_FUNC_MAC_GET_CTX_PARAMS:
- if (mac->get_ctx_params != NULL)
- break;
- mac->get_ctx_params = OSSL_FUNC_mac_get_ctx_params(fns);
- break;
- case OSSL_FUNC_MAC_SET_CTX_PARAMS:
- if (mac->set_ctx_params != NULL)
- break;
- mac->set_ctx_params = OSSL_FUNC_mac_set_ctx_params(fns);
- break;
- }
- }
- if (fnmaccnt != 3
- || fnctxcnt != 2) {
- /*
- * In order to be a consistent set of functions we must have at least
- * a complete set of "mac" functions, and a complete set of context
- * management functions, as well as the size function.
- */
- evp_mac_free(mac);
- ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
- return NULL;
- }
- mac->prov = prov;
- if (prov != NULL)
- ossl_provider_up_ref(prov);
- return mac;
- }
- EVP_MAC *EVP_MAC_fetch(OSSL_LIB_CTX *libctx, const char *algorithm,
- const char *properties)
- {
- return evp_generic_fetch(libctx, OSSL_OP_MAC, algorithm, properties,
- evp_mac_from_algorithm, evp_mac_up_ref,
- evp_mac_free);
- }
- int EVP_MAC_up_ref(EVP_MAC *mac)
- {
- return evp_mac_up_ref(mac);
- }
- void EVP_MAC_free(EVP_MAC *mac)
- {
- evp_mac_free(mac);
- }
- const OSSL_PROVIDER *EVP_MAC_get0_provider(const EVP_MAC *mac)
- {
- return mac->prov;
- }
- const OSSL_PARAM *EVP_MAC_gettable_params(const EVP_MAC *mac)
- {
- if (mac->gettable_params == NULL)
- return NULL;
- return mac->gettable_params(ossl_provider_ctx(EVP_MAC_get0_provider(mac)));
- }
- const OSSL_PARAM *EVP_MAC_gettable_ctx_params(const EVP_MAC *mac)
- {
- void *alg;
- if (mac->gettable_ctx_params == NULL)
- return NULL;
- alg = ossl_provider_ctx(EVP_MAC_get0_provider(mac));
- return mac->gettable_ctx_params(NULL, alg);
- }
- const OSSL_PARAM *EVP_MAC_settable_ctx_params(const EVP_MAC *mac)
- {
- void *alg;
- if (mac->settable_ctx_params == NULL)
- return NULL;
- alg = ossl_provider_ctx(EVP_MAC_get0_provider(mac));
- return mac->settable_ctx_params(NULL, alg);
- }
- const OSSL_PARAM *EVP_MAC_CTX_gettable_params(EVP_MAC_CTX *ctx)
- {
- void *alg;
- if (ctx->meth->gettable_ctx_params == NULL)
- return NULL;
- alg = ossl_provider_ctx(EVP_MAC_get0_provider(ctx->meth));
- return ctx->meth->gettable_ctx_params(ctx->algctx, alg);
- }
- const OSSL_PARAM *EVP_MAC_CTX_settable_params(EVP_MAC_CTX *ctx)
- {
- void *alg;
- if (ctx->meth->settable_ctx_params == NULL)
- return NULL;
- alg = ossl_provider_ctx(EVP_MAC_get0_provider(ctx->meth));
- return ctx->meth->settable_ctx_params(ctx->algctx, alg);
- }
- void EVP_MAC_do_all_provided(OSSL_LIB_CTX *libctx,
- void (*fn)(EVP_MAC *mac, void *arg),
- void *arg)
- {
- evp_generic_do_all(libctx, OSSL_OP_MAC,
- (void (*)(void *, void *))fn, arg,
- evp_mac_from_algorithm, evp_mac_up_ref, evp_mac_free);
- }
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