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75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
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* Copyright (C) 2023 TU Dresden
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @defgroup sys_hashes_sha512_common SHA-512 common
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* @ingroup sys_hashes_unkeyed
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* @brief Implementation of common functionality for SHA-512 hashing function
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* @{
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*
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* @file
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* @brief Common definitions for the SHA-512 hash function
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*
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* @author Mikolai Gütschow <mikolai.guetschow@tu-dresden.de>
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*/
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#ifndef HASHES_SHA512_COMMON_H
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#define HASHES_SHA512_COMMON_H
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#include <string.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Structure to hold the SHA-512 context.
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*/
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typedef struct {
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/** global state */
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uint64_t state[8];
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/** processed bits counter */
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uint64_t count[2];
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/** data buffer */
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unsigned char buf[128];
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} sha512_common_context_t;
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/**
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* @brief SHA-512 initialization. Begins a SHA-512 operation.
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*
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* @param ctx sha512_common_context_t handle to init, must not be NULL
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*/
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void sha512_common_pad(sha512_common_context_t *ctx);
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/**
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* @brief Add bytes into the hash
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*
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* @param ctx sha512_common_context_t handle to use, must not be NULL
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* @param[in] data Input data
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* @param[in] len Length of @p data
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*/
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void sha512_common_update(sha512_common_context_t *ctx, const void *data, size_t len);
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/**
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* @brief SHA-512 finalization. Pads the input data, exports the hash value,
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* and clears the context state.
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*
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* @param ctx sha512_common_context_t handle to use, must not be NULL
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* @param[out] digest resulting digest, this is the hash of all the bytes
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* @param[in] dig_len Length of @p digest
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*/
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void sha512_common_final(sha512_common_context_t *ctx, void *digest, size_t dig_len);
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#ifdef __cplusplus
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}
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#endif
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/** @} */
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#endif /* HASHES_SHA512_COMMON_H */
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