cc2420-aes.h

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/*
 * Copyright (c) 2008, Swedish Institute of Computer Science.
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 * This file is part of the Contiki operating system.
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 * $Id: cc2420-aes.h,v 1.3 2010/03/15 23:04:54 nifi Exp $
 */

/**
 * \file
 *         Interface to the CC2420 AES encryption/decryption functions
 * \author
 *         Adam Dunkels <adam@sics.se>
 */

#ifndef __CC2420_AES_H__
#define __CC2420_AES_H__

/**
 * \brief      Setup an AES key
 * \param key  A pointer to a 16-byte AES key
 * \param index The key index: either 0 or 1.
 *
 *             This function sets up an AES key with the CC2420
 *             chip. The AES key can later be used with the
 *             cc2420_aes_cipher() function to encrypt or decrypt
 *             data.
 *
 *             The CC2420 can store two separate keys in its
 *             memory. The keys are indexed as 0 or 1 and the key
 *             index is given by the 'index' parameter.
 *
 */
void cc2420_aes_set_key(const uint8_t *key, int index);


/**
 * \brief      Encrypt/decrypt data with AES
 * \param data A pointer to the data to be encrypted/decrypted
 * \param len  The length of the data to be encrypted/decrypted
 * \param key_index The key to use. The key must have previously been set up with cc2420_aes_set_key().
 *
 *             This function encrypts/decrypts data with AES. A
 *             pointer to the data is passed as a parameter, and the
 *             function overwrites the data with the encrypted data.
 *
 */
void cc2420_aes_cipher(uint8_t *data, int len, int key_index);


#endif /* __CC2420_AES_H__ */