sha2.h File Reference

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Classes
struct	sha2_context
	SHA-256 context structure. More...

Functions
void	sha2_starts (sha2_context *ctx, int is224)
	SHA-256 context setup. More...
void	sha2_update (sha2_context *ctx, unsigned char *input, int ilen)
	SHA-256 process buffer. More...
void	sha2_finish (sha2_context *ctx, unsigned char *output)
	SHA-256 final digest. More...
void	sha2 (unsigned char *input, int ilen, unsigned char *output, int is224)
	Output = SHA-256( input buffer ) More...
void	sha2_hmac_starts (sha2_context *ctx, int is224, unsigned char *key, int keylen)
	Output = SHA-256( file contents ) More...
void	sha2_hmac_update (sha2_context *ctx, unsigned char *input, int ilen)
	SHA-256 HMAC process buffer. More...
void	sha2_hmac_finish (sha2_context *ctx, unsigned char *output)
	SHA-256 HMAC final digest. More...
void	sha2_hmac (unsigned char *key, int keylen, unsigned char *input, int ilen, unsigned char *output, int is224)
	Output = HMAC-SHA-256( hmac key, input buffer ) More...
int	sha2_self_test (int verbose)
	Checkup routine. More...

Function Documentation

void sha2_starts	(	sha2_context *	ctx,
		int	is224
	)

SHA-256 context setup.

Parameters

ctx	context to be initialized
is224	0 = use SHA256, 1 = use SHA224

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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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void sha2_finish	(	sha2_context *	ctx,
		unsigned char *	output
	)

SHA-256 final digest.

Parameters

ctx	SHA-256 context
output	SHA-224/256 checksum result

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void sha2	(	unsigned char *	input,
		int	ilen,
		unsigned char *	output,
		int	is224
	)

Output = SHA-256( input buffer )

Parameters

input	buffer holding the data
ilen	length of the input data
output	SHA-224/256 checksum result
is224	0 = use SHA256, 1 = use SHA224

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void sha2_hmac_starts	(	sha2_context *	ctx,
		int	is224,
		unsigned char *	key,
		int	keylen
	)

Output = SHA-256( file contents )

Parameters

path	input file name
output	SHA-224/256 checksum result
is224	0 = use SHA256, 1 = use SHA224

Returns

0 if successful, 1 if fopen failed, or 2 if fread failed SHA-256 HMAC context setup

Parameters

ctx	HMAC context to be initialized
is224	0 = use SHA256, 1 = use SHA224
key	HMAC secret key
keylen	length of the HMAC key

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void sha2_hmac_update	(	sha2_context *	ctx,
		unsigned char *	input,
		int	ilen
	)

SHA-256 HMAC process buffer.

Parameters

ctx	HMAC context
input	buffer holding the data
ilen	length of the input data

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void sha2_hmac_finish	(	sha2_context *	ctx,
		unsigned char *	output
	)

SHA-256 HMAC final digest.

Parameters

ctx	HMAC context
output	SHA-224/256 HMAC checksum result

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void sha2_hmac	(	unsigned char *	key,
		int	keylen,
		unsigned char *	input,
		int	ilen,
		unsigned char *	output,
		int	is224
	)

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

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-224/256 result
is224	0 = use SHA256, 1 = use SHA224

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int sha2_self_test

(

int

verbose

)

Checkup routine.

Returns

0 if successful, or 1 if the test failed

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