sha2.h File Reference

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Data Structures
struct	sha2_context
	SHA-256 context structure. More...

Functions
void	sha2_starts (sha2_context *ctx)
	SHA-256 context setup.
void	sha2_update (sha2_context *ctx, unsigned char *input, int ilen)
	SHA-256 process buffer.
void	sha2_finish (sha2_context *ctx, unsigned char output[32])
	SHA-256 final digest.
void	sha2_csum (unsigned char *input, int ilen, unsigned char output[32])
	Output = SHA-256( input buffer )
int	sha2_file (char *path, unsigned char output[32])
	Output = SHA-256( file contents )
void	sha2_hmac (unsigned char *key, int keylen, unsigned char *input, int ilen, unsigned char output[32])
	Output = HMAC-SHA-256( input buffer, hmac key )
int	sha2_self_test (void)
	Checkup routine.

Function Documentation

sha2_csum()

void sha2_csum	(	unsigned char *	input,
		int	ilen,
		unsigned char	output[32]
	)

Output = SHA-256( input buffer )

Parameters

input	buffer holding the data
ilen	length of the input data
output	SHA-256 checksum result

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sha2_file()

int sha2_file	(	char *	path,
		unsigned char	output[32]
	)

Output = SHA-256( file contents )

Parameters

path	input file name
output	SHA-256 checksum result

Returns

0 if successful, or 1 if fopen failed

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sha2_finish()

void sha2_finish	(	sha2_context *	ctx,
		unsigned char	output[32]
	)

SHA-256 final digest.

Parameters

ctx	SHA-256 context
output	SHA-256 checksum result

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sha2_hmac()

void sha2_hmac	(	unsigned char *	key,
		int	keylen,
		unsigned char *	input,
		int	ilen,
		unsigned char	output[32]
	)

Output = HMAC-SHA-256( input buffer, hmac key )

Parameters

key	HMAC secret key
keylen	length of the HMAC key
input	buffer holding the data
ilen	length of the input data
output	HMAC-SHA-256 result

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sha2_self_test()

int sha2_self_test

(

void

)

Checkup routine.

Returns

0 if successful, or 1 if the test failed

sha2_starts()

void sha2_starts

(

sha2_context *

ctx

)

SHA-256 context setup.

Parameters

ctx	SHA-256 context to be initialized

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sha2_update()

void sha2_update	(	sha2_context *	ctx,
		unsigned char *	input,
		int	ilen
	)

SHA-256 process buffer.

Parameters

ctx	SHA-256 context
input	buffer holding the data
ilen	length of the input data

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