AES_CMAC

Implementation of the AES CMAC hashing function. More...

Detailed Description

Implementation of the AES CMAC hashing function.

Files
file	cmac.h
	AES_CMAC interface definition.

Data Structures
struct	cmac_context_t
	AES_CMAC calculation context. More...

Macros
#define	CMAC_BLOCK_SIZE   16
	Length of AES_CMAC block in bytes.

Functions
int	cmac_init (cmac_context_t *ctx, const uint8_t *key, uint8_t key_size)
	Initialize CMAC message digest context. More...
void	cmac_update (cmac_context_t *ctx, const void *data, size_t len)
	Update the CMAC context with a portion of the message being hashed. More...
void	cmac_final (cmac_context_t *ctx, void *digest)
	Finalizes the CMAC message digest. More...

Function Documentation

cmac_final()

void cmac_final	(	cmac_context_t *	ctx,
		void *	digest
	)

Finalizes the CMAC message digest.

Parameters

[in]	ctx	Pointer to the CMAC context
[out]	digest	Result location

cmac_init()

int cmac_init	(	cmac_context_t *	ctx,
		const uint8_t *	key,
		uint8_t	key_size
	)

Initialize CMAC message digest context.

Parameters

[in]	ctx	Pointer to the CMAC context to initialize
[in]	key	Key to be set
[in]	key_size	Size of the key

Returns

CIPHER_INIT_SUCCESS if the initialization was successful. CIPHER_ERR_INVALID_KEY_SIZE if the key size is not valid.

cmac_update()

void cmac_update	(	cmac_context_t *	ctx,
		const void *	data,
		size_t	len
	)

Update the CMAC context with a portion of the message being hashed.

Parameters

[in]	ctx	Pointer to the CMAC context to update
[in]	data	Input data
[in]	len	Length of data