4772884133
Using static inline functions is bad for code size; the function from md_internal.h was already used from 3 different C files, so already was copied at least 3 times in the library, and this would only get worse over time. Use actual functions, and also share the actual data between them. Provide a consistent set of operations. Conversion to/from human-readable string was omitted for now but could be added later if needed. In the future, this can be used to replace other similar (inline) functions that are currently scattered, including (but perhaps not limited to): - mbedtls_psa_translate_md() from psa_util.h - mbedtls_md_info_from_psa() (indirectly) from psa_crypto_hash.h - get_md_alg_from_psa() from psa_crypto_rsa.c Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
/*
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* Hash information that's independent from the crypto implementation.
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*
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* (See the corresponding header file for usage notes.)
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*/
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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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#include "hash_info.h"
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#include "or_psa_helpers.h"
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typedef struct
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{
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psa_algorithm_t psa_alg;
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mbedtls_md_type_t md_type;
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unsigned char size;
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unsigned char block_size;
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} hash_entry;
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static const hash_entry hash_table[] = {
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#if defined(MBEDTLS_OR_PSA_WANT_ALG_MD5)
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{ PSA_ALG_MD5, MBEDTLS_MD_MD5, 16, 64 },
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#endif
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#if defined(MBEDTLS_OR_PSA_WANT_ALG_RIPEMD160)
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{ PSA_ALG_RIPEMD160, MBEDTLS_MD_RIPEMD160, 20, 64 },
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#endif
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#if defined(MBEDTLS_OR_PSA_WANT_ALG_SHA_1)
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{ PSA_ALG_SHA_1, MBEDTLS_MD_SHA1, 20, 64 },
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#endif
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#if defined(MBEDTLS_OR_PSA_WANT_ALG_SHA_224)
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{ PSA_ALG_SHA_224, MBEDTLS_MD_SHA224, 28, 64 },
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#endif
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#if defined(MBEDTLS_OR_PSA_WANT_ALG_SHA_256)
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{ PSA_ALG_SHA_256, MBEDTLS_MD_SHA256, 32, 64 },
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#endif
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#if defined(MBEDTLS_OR_PSA_WANT_ALG_SHA_384)
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{ PSA_ALG_SHA_384, MBEDTLS_MD_SHA384, 48, 128 },
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#endif
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#if defined(MBEDTLS_OR_PSA_WANT_ALG_SHA_512)
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{ PSA_ALG_SHA_512, MBEDTLS_MD_SHA512, 64, 128 },
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#endif
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{ PSA_ALG_NONE, MBEDTLS_MD_NONE, 0, 0 },
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};
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/* Get size from MD type */
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unsigned char mbedtls_hash_info_get_size( mbedtls_md_type_t md_type )
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{
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const hash_entry *entry = hash_table;
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while( entry->md_type != MBEDTLS_MD_NONE &&
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entry->md_type != md_type )
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{
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entry++;
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}
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return entry->size;
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}
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/* Get block size from MD type */
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unsigned char mbedtls_hash_info_get_block_size( mbedtls_md_type_t md_type )
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{
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const hash_entry *entry = hash_table;
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while( entry->md_type != MBEDTLS_MD_NONE &&
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entry->md_type != md_type )
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{
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entry++;
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}
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return entry->block_size;
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}
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/* Get PSA from MD */
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psa_algorithm_t mbedtls_hash_info_psa_from_md( mbedtls_md_type_t md_type )
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{
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const hash_entry *entry = hash_table;
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while( entry->md_type != MBEDTLS_MD_NONE &&
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entry->md_type != md_type )
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{
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entry++;
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}
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return entry->psa_alg;
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}
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/* Get PSA from MD */
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mbedtls_md_type_t mbedtls_hash_info_md_from_psa( psa_algorithm_t psa_alg )
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{
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const hash_entry *entry = hash_table;
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while( entry->md_type != MBEDTLS_MD_NONE &&
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entry->psa_alg != psa_alg )
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{
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entry++;
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}
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return entry->md_type;
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}
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