Functions to compute SHA1 HAMAC. More...

#include <stdint.h>

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#define	SHA1_DIGEST_LENGTH 20

void	hmac_sha1 (uint8_t key, int32_t key_length, const uint8_t data, uint32_t data_length, uint8_t mac, int32_t mac_length)
	Compute SHA1 HMAC. More...

void	hmac_sha1 (uint8_t key, int32_t key_length, const uint8_t data[], uint32_t data_length[], uint8_t mac, int32_t mac_length)
	Compute SHA1 HMAC over several data cunks. More...

void *	createSha1HmacContext (uint8_t *key, int32_t key_length)
	Create and initialize a SHA1 HMAC context. More...

void	hmacSha1Ctx (void ctx, const uint8_t data, uint32_t data_length, uint8_t mac, int32_t mac_length)
	Compute SHA1 HMAC. More...

void	hmacSha1Ctx (void ctx, const uint8_t data[], uint32_t data_length[], uint8_t mac, int32_t mac_length)
	Compute SHA1 HMAC over several data cunks. More...

void	freeSha1HmacContext (void *ctx)
	Free SHA1 HMAC context. More...

Detailed Description

Functions to compute SHA1 HAMAC.

Author: Erik Eliasson elias.nosp@m.son@.nosp@m.it.kt.nosp@m.h.se; Johan Bilien jobi@.nosp@m.via..nosp@m.ecp.f.nosp@m.r; Werner Dittmann

Functions that provide SHA1 HMAC support

Definition in file hmac.h.

Macro Definition Documentation

#define SHA1_DIGEST_LENGTH 20

Definition at line 54 of file hmac.h.

Function Documentation

void* createSha1HmacContext	(	uint8_t *	key,
		int32_t	key_length
	)

Create and initialize a SHA1 HMAC context.

An application uses this context to create several HMAC with the same key.

Parameters

key	The MAC key.
key_length	Lenght of the MAC key in bytes

Returns: Returns a pointer to the initialized context

Definition at line 70 of file gcrypthmac.cpp.

void freeSha1HmacContext ( void * ctx )

Free SHA1 HMAC context.

Parameters

ctx	a pointer to SHA1 HMAC context

Definition at line 113 of file gcrypthmac.cpp.

void hmac_sha1	(	uint8_t *	key,
		int32_t	key_length,
		const uint8_t *	data,
		uint32_t	data_length,
		uint8_t *	mac,
		int32_t *	mac_length
	)

Compute SHA1 HMAC.

This functions takes one data chunk and computes its SHA1 HMAC.

Parameters

key	The MAC key.
key_length	Lneght of the MAC key in bytes
data	Points to the data chunk.
data_length	Length of the data in bytes
mac	Points to a buffer that receives the computed digest. This buffer must have a size of at least 20 bytes (SHA1_DIGEST_LENGTH).
mac_length	Point to an integer that receives the length of the computed HMAC.

Definition at line 42 of file hmac.cpp.

void hmac_sha1	(	uint8_t *	key,
		int32_t	key_length,
		const uint8_t *	data[],
		uint32_t	data_length[],
		uint8_t *	mac,
		int32_t *	mac_length
	)

Compute SHA1 HMAC over several data cunks.

This functions takes several data chunk and computes the SHA1 HAMAC.

Parameters

key	The MAC key.
key_length	Lneght of the MAC key in bytes
data	Points to an array of pointers that point to the data chunks. A NULL pointer in an array element terminates the data chunks.
data_length	Points to an array of integers that hold the length of each data chunk.
mac	Points to a buffer that receives the computed digest. This buffer must have a size of at least 20 bytes (SHA1_DIGEST_LENGTH).
mac_length	Point to an integer that receives the length of the computed HMAC.

Definition at line 47 of file gcrypthmac.cpp.

void hmacSha1Ctx	(	void *	ctx,
		const uint8_t *	data,
		uint32_t	data_length,
		uint8_t *	mac,
		int32_t *	mac_length
	)

Compute SHA1 HMAC.

This functions takes one data chunk and computes its SHA1 HMAC. On return the SHA1 MAC context is ready to compute a HMAC for another data chunk.

Parameters

ctx	Pointer to initialized SHA1 HMAC context
data	Points to the data chunk.
data_length	Length of the data in bytes
mac	Points to a buffer that receives the computed digest. This buffer must have a size of at least 20 bytes (SHA1_DIGEST_LENGTH).
mac_length	Point to an integer that receives the length of the computed HMAC.

Definition at line 79 of file gcrypthmac.cpp.

void hmacSha1Ctx	(	void *	ctx,
		const uint8_t *	data[],
		uint32_t	data_length[],
		uint8_t *	mac,
		int32_t *	mac_length
	)

Compute SHA1 HMAC over several data cunks.

This functions takes several data chunks and computes the SHA1 HAMAC. On return the SHA1 MAC context is ready to compute a HMAC for another data chunk.

Parameters

ctx	Pointer to initialized SHA1 HMAC context
data	Points to an array of pointers that point to the data chunks. A NULL pointer in an array element terminates the data chunks.
data_length	Points to an array of integers that hold the length of each data chunk.
mac	Points to a buffer that receives the computed digest. This buffer must have a size of at least 20 bytes (SHA1_DIGEST_LENGTH).
mac_length	Point to an integer that receives the length of the computed HMAC.

Definition at line 95 of file gcrypthmac.cpp.