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/*
* Copyright 2018-2020 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 <string.h>
#include <stdarg.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/core.h>
#include <openssl/core_names.h>
#include <openssl/types.h>
#include "internal/nelem.h"
#include "crypto/evp.h"
#include "internal/provider.h"
#include "evp_local.h"
EVP_MAC_CTX *EVP_MAC_CTX_new(EVP_MAC *mac)
{
EVP_MAC_CTX *ctx = OPENSSL_zalloc(sizeof(EVP_MAC_CTX));
if (ctx == NULL
|| (ctx->data = mac->newctx(ossl_provider_ctx(mac->prov))) == NULL
|| !EVP_MAC_up_ref(mac)) {
EVPerr(EVP_F_EVP_MAC_CTX_NEW, ERR_R_MALLOC_FAILURE);
if (ctx != NULL)
mac->freectx(ctx->data);
OPENSSL_free(ctx);
ctx = NULL;
} else {
ctx->meth = mac;
}
return ctx;
}
void EVP_MAC_CTX_free(EVP_MAC_CTX *ctx)
{
if (ctx != NULL) {
ctx->meth->freectx(ctx->data);
ctx->data = NULL;
/* refcnt-- */
EVP_MAC_free(ctx->meth);
}
OPENSSL_free(ctx);
}
EVP_MAC_CTX *EVP_MAC_CTX_dup(const EVP_MAC_CTX *src)
{
EVP_MAC_CTX *dst;
if (src->data == NULL)
return NULL;
dst = OPENSSL_malloc(sizeof(*dst));
if (dst == NULL) {
EVPerr(EVP_F_EVP_MAC_CTX_DUP, ERR_R_MALLOC_FAILURE);
return NULL;
}
*dst = *src;
if (!EVP_MAC_up_ref(dst->meth)) {
EVPerr(EVP_F_EVP_MAC_CTX_DUP, ERR_R_MALLOC_FAILURE);
OPENSSL_free(dst);
return NULL;
}
dst->data = src->meth->dupctx(src->data);
if (dst->data == NULL) {
EVP_MAC_CTX_free(dst);
return NULL;
}
return dst;
}
EVP_MAC *EVP_MAC_CTX_mac(EVP_MAC_CTX *ctx)
{
return ctx->meth;
}
size_t EVP_MAC_size(EVP_MAC_CTX *ctx)
{
size_t sz = 0;
if (ctx->data != NULL) {
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_size_t(OSSL_MAC_PARAM_SIZE, &sz);
if (ctx->meth->get_ctx_params != NULL) {
if (ctx->meth->get_ctx_params(ctx->data, params))
return sz;
} else if (ctx->meth->get_params != NULL) {
if (ctx->meth->get_params(params))
return sz;
}
}
/*
* If the MAC hasn't been initialized yet, or there is no size to get,
* we return zero
*/
return 0;
}
int EVP_MAC_init(EVP_MAC_CTX *ctx)
{
return ctx->meth->init(ctx->data);
}
int EVP_MAC_update(EVP_MAC_CTX *ctx, const unsigned char *data, size_t datalen)
{
if (datalen == 0)
return 1;
return ctx->meth->update(ctx->data, data, datalen);
}
int EVP_MAC_final(EVP_MAC_CTX *ctx,
unsigned char *out, size_t *outl, size_t outsize)
{
int l = EVP_MAC_size(ctx);
if (l < 0)
return 0;
if (outl != NULL)
*outl = l;
if (out == NULL)
return 1;
return ctx->meth->final(ctx->data, out, outl, outsize);
}
/*
* The {get,set}_params functions return 1 if there is no corresponding
* function in the implementation. This is the same as if there was one,
* but it didn't recognise any of the given params, i.e. nothing in the
* bag of parameters was useful.
*/
int EVP_MAC_get_params(EVP_MAC *mac, OSSL_PARAM params[])
{
if (mac->get_params != NULL)
return mac->get_params(params);
return 1;
}
int EVP_MAC_CTX_get_params(EVP_MAC_CTX *ctx, OSSL_PARAM params[])
{
if (ctx->meth->get_ctx_params != NULL)
return ctx->meth->get_ctx_params(ctx->data, params);
return 1;
}
int EVP_MAC_CTX_set_params(EVP_MAC_CTX *ctx, const OSSL_PARAM params[])
{
if (ctx->meth->set_ctx_params != NULL)
return ctx->meth->set_ctx_params(ctx->data, params);
return 1;
}
int EVP_MAC_number(const EVP_MAC *mac)
{
return mac->name_id;
}
int EVP_MAC_is_a(const EVP_MAC *mac, const char *name)
{
return evp_is_a(mac->prov, mac->name_id, NULL, name);
}
void EVP_MAC_names_do_all(const EVP_MAC *mac,
void (*fn)(const char *name, void *data),
void *data)
{
if (mac->prov != NULL)
evp_names_do_all(mac->prov, mac->name_id, fn, data);
}
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