1/*
2 * aes.h
3 *
4 * header file for the AES block cipher
5 *
6 * David A. McGrew
7 * Cisco Systems, Inc.
8 */
9
10/*
11 *
12 * Copyright (c) 2001-2006, Cisco Systems, Inc.
13 * All rights reserved.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 *
19 *   Redistributions of source code must retain the above copyright
20 *   notice, this list of conditions and the following disclaimer.
21 *
22 *   Redistributions in binary form must reproduce the above
23 *   copyright notice, this list of conditions and the following
24 *   disclaimer in the documentation and/or other materials provided
25 *   with the distribution.
26 *
27 *   Neither the name of the Cisco Systems, Inc. nor the names of its
28 *   contributors may be used to endorse or promote products derived
29 *   from this software without specific prior written permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
34 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
35 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
36 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
37 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
38 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
42 * OF THE POSSIBILITY OF SUCH DAMAGE.
43 *
44 */
45
46#ifndef _AES_H
47#define _AES_H
48
49#include "config.h"
50
51#include "datatypes.h"
52#include "gf2_8.h"
53#include "err.h"
54
55/* aes internals */
56
57typedef struct {
58  v128_t round[15];
59  int num_rounds;
60} aes_expanded_key_t;
61
62err_status_t
63aes_expand_encryption_key(const uint8_t *key,
64			  int key_len,
65			  aes_expanded_key_t *expanded_key);
66
67err_status_t
68aes_expand_decryption_key(const uint8_t *key,
69			  int key_len,
70			  aes_expanded_key_t *expanded_key);
71
72void
73aes_encrypt(v128_t *plaintext, const aes_expanded_key_t *exp_key);
74
75void
76aes_decrypt(v128_t *plaintext, const aes_expanded_key_t *exp_key);
77
78#if 0
79/*
80 * internal functions
81 */
82
83void
84aes_init_sbox(void);
85
86void
87aes_compute_tables(void);
88#endif
89
90#endif /* _AES_H */
91