ccm.h

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/*
 * Copyright (C) 2015 Freie Universität Berlin
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once

 
#include "crypto/ciphers.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#define CCM_ERR_INVALID_NONCE_LENGTH        (-2)
#define CCM_ERR_INVALID_CBC_MAC             (-3)
#define CCM_ERR_INVALID_DATA_LENGTH         (-3)
#define CCM_ERR_INVALID_LENGTH_ENCODING     (-4)
#define CCM_ERR_INVALID_MAC_LENGTH          (-5)

#define CCM_BLOCK_SIZE                      16

#define CCM_MAC_MAX_LEN                     16

int cipher_encrypt_ccm(const cipher_t *cipher,
                       const uint8_t *auth_data, uint32_t auth_data_len,
                       uint8_t mac_length, uint8_t length_encoding,
                       const uint8_t *nonce, size_t nonce_len,
                       const uint8_t *input, size_t input_len,
                       uint8_t *output);

int cipher_decrypt_ccm(const cipher_t *cipher,
                       const uint8_t *auth_data, uint32_t auth_data_len,
                       uint8_t mac_length, uint8_t length_encoding,
                       const uint8_t *nonce, size_t nonce_len,
                       const uint8_t *input, size_t input_len,
                       uint8_t *output);
 
#ifdef __cplusplus
}
#endif