1/**
2 * \file arc4.h
3 *
4 *  Based on XySSL: Copyright (C) 2006-2008  Christophe Devine
5 *
6 *  Copyright (C) 2009  Paul Bakker <polarssl_maintainer at polarssl dot org>
7 *
8 *  All rights reserved.
9 *
10 *  Redistribution and use in source and binary forms, with or without
11 *  modification, are permitted provided that the following conditions
12 *  are met:
13 *
14 *    * Redistributions of source code must retain the above copyright
15 *      notice, this list of conditions and the following disclaimer.
16 *    * Redistributions in binary form must reproduce the above copyright
17 *      notice, this list of conditions and the following disclaimer in the
18 *      documentation and/or other materials provided with the distribution.
19 *    * Neither the names of PolarSSL or XySSL nor the names of its contributors
20 *      may be used to endorse or promote products derived from this software
21 *      without specific prior written permission.
22 *
23 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
26 *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27 *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
29 *  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36#include "netif/ppp/ppp_opts.h"
37#if LWIP_INCLUDED_POLARSSL_ARC4
38
39#ifndef LWIP_INCLUDED_POLARSSL_ARC4_H
40#define LWIP_INCLUDED_POLARSSL_ARC4_H
41
42/**
43 * \brief          ARC4 context structure
44 */
45typedef struct
46{
47    int x;                      /*!< permutation index */
48    int y;                      /*!< permutation index */
49    unsigned char m[256];       /*!< permutation table */
50}
51arc4_context;
52
53#ifdef __cplusplus
54extern "C" {
55#endif
56
57/**
58 * \brief          ARC4 key schedule
59 *
60 * \param ctx      ARC4 context to be initialized
61 * \param key      the secret key
62 * \param keylen   length of the key
63 */
64void arc4_setup( arc4_context *ctx, unsigned char *key, int keylen );
65
66/**
67 * \brief          ARC4 cipher function
68 *
69 * \param ctx      ARC4 context
70 * \param buf      buffer to be processed
71 * \param buflen   amount of data in buf
72 */
73void arc4_crypt( arc4_context *ctx, unsigned char *buf, int buflen );
74
75#ifdef __cplusplus
76}
77#endif
78
79#endif /* LWIP_INCLUDED_POLARSSL_ARC4_H */
80
81#endif /* LWIP_INCLUDED_POLARSSL_ARC4 */
82