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/**
* Hash information that's independent from the crypto implementation.
*
* This can be used by:
* - code based on PSA
* - code based on the legacy API
* - code based on either of them depending on MBEDTLS_USE_PSA_CRYPTO
* - code based on either of them depending on what's available
*
* Note: this internal module will go away when everything becomes based on
* PSA Crypto; it is a helper for the transition while hash algorithms are
* still represented using mbedtls_md_type_t in most places even when PSA is
* used for the actual crypto computations.
*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef MBEDTLS_HASH_INFO_H
#define MBEDTLS_HASH_INFO_H
#include "common.h"
#include "mbedtls/md.h"
#include "psa/crypto.h"
/** \def MBEDTLS_HASH_MAX_SIZE
*
* Maximum size of a hash based on configuration.
*/
#if defined(MBEDTLS_MD_C) && ( \
!defined(MBEDTLS_PSA_CRYPTO_C) || \
MBEDTLS_MD_MAX_SIZE >= PSA_HASH_MAX_SIZE )
#define MBEDTLS_HASH_MAX_SIZE MBEDTLS_MD_MAX_SIZE
#elif defined(MBEDTLS_PSA_CRYPTO_C) && ( \
!defined(MBEDTLS_MD_C) || \
PSA_HASH_MAX_SIZE >= MBEDTLS_MD_MAX_SIZE )
#define MBEDTLS_HASH_MAX_SIZE PSA_HASH_MAX_SIZE
#endif
/** Get the output length of the given hash type from its MD type.
*
* \note To get the output length from the PSA alg, use \c PSA_HASH_LENGTH().
*
* \param md_type The hash MD type.
*
* \return The output length in bytes, or 0 if not known.
*/
unsigned char mbedtls_hash_info_get_size( mbedtls_md_type_t md_type );
/** Get the block size of the given hash type from its MD type.
*
* \note To get the output length from the PSA alg, use
* \c PSA_HASH_BLOCK_LENGTH().
*
* \param md_type The hash MD type.
*
* \return The block size in bytes, or 0 if not known.
*/
unsigned char mbedtls_hash_info_get_block_size( mbedtls_md_type_t md_type );
/** Get the PSA alg from the MD type.
*
* \param md_type The hash MD type.
*
* \return The corresponding PSA algorithm identifier,
* or PSA_ALG_NONE if not known.
*/
psa_algorithm_t mbedtls_hash_info_psa_from_md( mbedtls_md_type_t md_type );
/** Get the MD type alg from the PSA algorithm identifier.
*
* \param psa_alg The PSA hash algorithm.
*
* \return The corresponding MD type,
* or MBEDTLS_MD_NONE if not known.
*/
mbedtls_md_type_t mbedtls_hash_info_md_from_psa( psa_algorithm_t psa_alg );
/** Convert PSA status to MD error code.
*
* \param status PSA status.
*
* \return The corresponding MD error code,
*/
int mbedtls_md_error_from_psa( psa_status_t status );
#endif /* MBEDTLS_HASH_INFO_H */
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