aes-omac1.c File Reference

One-key CBC MAC (OMAC1) hash with AES-128. More...

#include "includes.h"
#include "common.h"
#include "aes.h"
#include "aes_wrap.h"

Functions
int	omac1_aes_128_vector (const u8 *key, size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
	One-Key CBC MAC (OMAC1) hash with AES-128.
int	omac1_aes_128 (const u8 *key, const u8 *data, size_t data_len, u8 *mac)
	One-Key CBC MAC (OMAC1) hash with AES-128 (aka AES-CMAC)

---

Detailed Description

One-key CBC MAC (OMAC1) hash with AES-128.

Copyright

Copyright (c) 2003-2007, Jouni Malinen <j@w1.fi>

This software may be distributed under the terms of the BSD license. See README for more details.

---

Function Documentation

int omac1_aes_128	(	const u8 *	key,
		const u8 *	data,
		size_t	data_len,
		u8 *	mac
	)

One-Key CBC MAC (OMAC1) hash with AES-128 (aka AES-CMAC)

Parameters:

key	128-bit key for the hash operation
data	Data buffer for which a MAC is determined
data_len	Length of data buffer in bytes
mac	Buffer for MAC (128 bits, i.e., 16 bytes)

Returns:

0 on success, -1 on failure

This is a mode for using block cipher (AES in this case) for authentication. OMAC1 was standardized with the name CMAC by NIST in a Special Publication (SP) 800-38B.

int omac1_aes_128_vector	(	const u8 *	key,
		size_t	num_elem,
		const u8 *	addr[],
		const size_t *	len,
		u8 *	mac
	)

One-Key CBC MAC (OMAC1) hash with AES-128.

Parameters:

key	128-bit key for the hash operation
num_elem	Number of elements in the data vector
addr	Pointers to the data areas
len	Lengths of the data blocks
mac	Buffer for MAC (128 bits, i.e., 16 bytes)

Returns:

0 on success, -1 on failure

This is a mode for using block cipher (AES in this case) for authentication. OMAC1 was standardized with the name CMAC by NIST in a Special Publication (SP) 800-38B.