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