%PDF-
%PDF-
Mini Shell
Mini Shell
/*
* Copyright 2022 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, mac->lock);
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, mac->lock);
if (ref > 0)
return;
OPENSSL_free(mac->type_name);
ossl_provider_free(mac->prov);
CRYPTO_THREAD_lock_free(mac->lock);
OPENSSL_free(mac);
}
static void *evp_mac_new(void)
{
EVP_MAC *mac = NULL;
if ((mac = OPENSSL_zalloc(sizeof(*mac))) == NULL
|| (mac->lock = CRYPTO_THREAD_lock_new()) == NULL) {
evp_mac_free(mac);
return NULL;
}
mac->refcnt = 1;
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_MALLOC_FAILURE);
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);
}
Zerion Mini Shell 1.0