93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
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/*********************************************************************
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* Filename: sha256.h
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* Author: Brad Conte (brad AT bradconte.com)
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* Copyright:
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* Disclaimer: This code is presented "as is" without any guarantees.
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* Details: Defines the API for the corresponding SHA1 implementation.
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*********************************************************************/
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/*
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This code is released into the public domain free of any restrictions.
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The author requests acknowledgement if the code is used, but does not require it.
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This code is provided free of any liability and without any quality claims by the author.
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https://github.com/B-Con/crypto-algorithms
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*/
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#ifndef SHA256_H
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#define SHA256_H
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/*************************** HEADER FILES ***************************/
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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/** @defgroup SHA256_API Sha256
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* @brief APIs for using SHA256
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* @{
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*/
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/*============================================================================*
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* Macros
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*============================================================================*/
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/** @defgroup SHA256_API_Exported_Macros SHA256 APIs Exported Macros
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* @{
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*/
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#define SHA256_BLOCK_SIZE 32 // SHA256 outputs a 32 byte digest
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#define SHA256_USE_DYNAMIC_ALLOC 0
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/** End of SHA256_API_Exported_Macros
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* @}
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*/
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/*============================================================================*
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* Types
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*============================================================================*/
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/** @defgroup SHA256_API_Exported_Types SHA256 APIs Exported Types
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* @{
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*/
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typedef unsigned char BYTE; // 8-bit byte
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typedef unsigned int WORD; // 32-bit word, change to "long" for 16-bit machines
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/** @brief Context structure to store SHA256 algorithm intermediate information */
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typedef struct
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{
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BYTE data[64];
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WORD datalen;
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unsigned long long bitlen;
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WORD state[8];
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} SHA256_CTX;
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/** End of SHA256_API_Exported_Types
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* @}
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*/
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/*============================================================================*
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* Functions
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*============================================================================*/
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/** @defgroup SHA256_API_Exported_Functions SHA256 APIs Exported Functions
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* @brief
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* @{
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*/
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void SHA256_Init(SHA256_CTX *ctx);
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void SHA256_Update(SHA256_CTX *ctx, const BYTE data[], size_t len);
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void SHA256_Final(SHA256_CTX *ctx, BYTE hash[]);
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void SHA256(const void *in, size_t len, uint8_t *result);
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bool SHA256_Alloc(SHA256_CTX **ctx);
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void SHA256_Free(SHA256_CTX *ctx);
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/** End of SHA256_API_Exported_Functions
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* @}
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*/
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/** End of SHA256_API
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* @}
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*/
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#endif // SHA256_H
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