gcrypthmac.cpp File Reference

#include <gcrypt.h>
#include <crypto/hmac.h>
#include <stdio.h>

Include dependency graph for gcrypthmac.cpp:

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Functions
void	hmac_sha1 (uint8_t *key, int32_t keyLength, const uint8_t *data, int32_t dataLength, uint8_t *mac, int32_t *macLength)
void	hmac_sha1 (uint8_t *key, int32_t keyLength, const uint8_t *dataChunks[], uint32_t dataChunkLength[], uint8_t *mac, int32_t *macLength)
	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...

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	keyLength,
		const uint8_t *	data,
		int32_t	dataLength,
		uint8_t *	mac,
		int32_t *	macLength
	)

Definition at line 28 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 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.