99 lines
3.3 KiB
C
99 lines
3.3 KiB
C
/*
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* Copyright (C) 2019 Sean Parkinson, wolfSSL Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/**
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* @defgroup wolfssl_util wolfssl_util
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* @{ @ingroup wolfssl_p
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*/
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#ifndef WOLFSSL_PLUGIN_UTIL_H_
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#define WOLFSSL_PLUGIN_UTIL_H_
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#include <wolfssl/wolfcrypt/integer.h>
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#include <wolfssl/wolfcrypt/hash.h>
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/**
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* Creates a hash of a given type of a chunk of data.
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*
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* Note: this function allocates memory for the hash
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*
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* @param hash_type Hash enumeration
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* @param data the chunk of data to hash
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* @param hash chunk that contains the hash
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* @return TRUE on success, FALSE otherwise
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*/
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bool wolfssl_hash_chunk(int hash_type, chunk_t data, chunk_t *hash);
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/**
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* Exports the given integer (assumed to be a positive number) to a chunk in
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* two's complement format (i.e. a zero byte is added if the MSB is set).
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*
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* @param mp the integer to export
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* @param chunk the chunk (data gets allocated)
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* @return TRUE on success, FALSE otherwise
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*/
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bool wolfssl_mp2chunk(mp_int *mp, chunk_t *chunk);
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/**
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* Splits a chunk into two mp_ints of equal binary length.
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*
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* @param chunk a chunk that contains the two integers
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* @param a first mp_int
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* @param b second mp_int
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* @return TRUE on success, FALSE otherwise
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*/
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bool wolfssl_mp_split(chunk_t chunk, mp_int *a, mp_int *b);
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/**
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* Concatenates two integers into a chunk, thereby enforcing the length of
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* a single integer, if necessary, by pre-pending it with zeros.
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*
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* Note: this function allocates memory for the chunk
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*
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* @param len the length of a single integer
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* @param a first integer
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* @param b second integer
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* @param chunk resulting chunk
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* @return TRUE on success, FALSE otherwise
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*/
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bool wolfssl_mp_cat(int len, mp_int *a, mp_int *b, chunk_t *chunk);
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/**
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* Convert the hash algorithm to a wolfSSL hash type.
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*
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* @param hash hash algorithm
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* @param type Hash enumeration from wolfSSL
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* @return TRUE on success, FALSE otherwise
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*/
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bool wolfssl_hash2type(hash_algorithm_t hash, enum wc_HashType *type);
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/**
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* Convert the mgf1 hash algorithm to a wolfSSL mgf1 type.
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*
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* @param hash hash algorithm
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* @param mgf1 MGF1 algorithm from wolfSSL
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* @return TRUE on success, FALSE otherwise
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*/
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bool wolfssl_hash2mgf1(hash_algorithm_t hash, int *mgf1);
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#endif /** WOLFSSL_PLUGIN_UTIL_H_ @}*/
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