sha1_routines.h File Reference

Software implementation of the SHA1 algorithm.

Copyright

(c) 2019 Microchip Technology Inc. and its subsidiaries.

#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdint.h>

Data Structures
struct	CL_HashContext

Macros
#define	_NOP()
#define	_WDRESET()
#define	leftRotate(x, n)   (x) = (((x) << (n)) | ((x) >> (32 - (n))))
#define	memcpy_P   memmove
#define	strcpy_P   strcpy
#define	U16   uint16_t
#define	U32   uint32_t
#define	U8   uint8_t

Functions
void	CL_hash (U8 *msg, int msgBytes, U8 *dest)
	Perform SHA1 hash of data in software. More...
void	CL_hashFinal (CL_HashContext *ctx, U8 *dest)
	Complete the SHA1 hash in software and return the digest. More...
void	CL_hashInit (CL_HashContext *ctx)
	Initialize context for performing SHA1 hash in software. More...
void	CL_hashUpdate (CL_HashContext *ctx, const U8 *src, int nbytes)
	Add arbitrary data to a SHA1 hash. More...
void	shaEngine (U32 *buf, U32 *h)

#define _NOP

(

)

#define _WDRESET

(

)

#define leftRotate	(		x,
			n
	)		(x) = (((x) << (n)) | ((x) >> (32 - (n))))

Referenced by shaEngine().

#define memcpy_P   memmove

Referenced by CL_hashInit(), flashUpdateAppStartAddr(), and hwFlashWriteEepromPage().

#define strcpy_P   strcpy

#define U16   uint16_t

#define U32   uint32_t

#define U8   uint8_t

void CL_hash	(	U8 *	msg,
		int	msgBytes,
		U8 *	dest
	)

Perform SHA1 hash of data in software.

Parameters

[in]	msg	Data to be hashed
[in]	msgBytes	Data size in bytes
[out]	dest	Digest is returned here (20 bytes)

References CL_hashFinal(), CL_hashInit(), and CL_hashUpdate().

void CL_hashFinal	(	CL_HashContext *	ctx,
		U8 *	dest
	)

Complete the SHA1 hash in software and return the digest.

Parameters

[in]	ctx	Hash context
[out]	dest	Digest is returned here (20 bytes)

References CL_HashContext::buf, CL_HashContext::byteCount, CL_HashContext::byteCountHi, CL_HashContext::h, i, ptr, and shaEngine().

Referenced by atcac_sw_sha1_finish(), and CL_hash().

void CL_hashInit

(

CL_HashContext *

ctx

)

Initialize context for performing SHA1 hash in software.

Parameters

[in]

ctx

Hash context

References CL_HashContext::h, and memcpy_P.

Referenced by atcac_sw_sha1_init(), and CL_hash().

void CL_hashUpdate	(	CL_HashContext *	ctx,
		const U8 *	src,
		int	nbytes
	)

Add arbitrary data to a SHA1 hash.

Parameters

[in]	ctx	Hash context
[in]	src	Data to be added to the hash
[in]	nbytes	Data size in bytes

References CL_HashContext::buf, CL_HashContext::byteCount, CL_HashContext::byteCountHi, CL_HashContext::h, i, and shaEngine().

Referenced by atcac_sw_sha1_update(), and CL_hash().

void shaEngine	(	U32 *	buf,
		U32 *	h
	)

References leftRotate.

Referenced by CL_hashFinal(), and CL_hashUpdate().