1/*
2 * null-cipher.h
3 *
4 * header file for the null cipher
5 *
6 *
7 * David A. McGrew
8 * Cisco Systems, Inc.
9 */
10
11/*
12 *
13 * Copyright (c) 2001-2006, Cisco Systems, Inc.
14 * All rights reserved.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 *
20 *   Redistributions of source code must retain the above copyright
21 *   notice, this list of conditions and the following disclaimer.
22 *
23 *   Redistributions in binary form must reproduce the above
24 *   copyright notice, this list of conditions and the following
25 *   disclaimer in the documentation and/or other materials provided
26 *   with the distribution.
27 *
28 *   Neither the name of the Cisco Systems, Inc. nor the names of its
29 *   contributors may be used to endorse or promote products derived
30 *   from this software without specific prior written permission.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
35 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
36 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43 * OF THE POSSIBILITY OF SUCH DAMAGE.
44 *
45 */
46
47
48#ifndef NULL_CIPHER_H
49#define NULL_CIPHER_H
50
51#include "datatypes.h"
52#include "cipher.h"
53
54typedef struct {
55  char foo ;/* empty, for now */
56} null_cipher_ctx_t;
57
58
59/*
60 * none of these functions do anything (though future versions may keep
61 * track of bytes encrypted, number of instances, and/or other info).
62 */
63
64err_status_t
65null_cipher_init(null_cipher_ctx_t *c, const uint8_t *key);
66
67err_status_t
68null_cipher_set_segment(null_cipher_ctx_t *c,
69			unsigned long index);
70
71err_status_t
72null_cipher_encrypt(null_cipher_ctx_t *c,
73		    unsigned char *buf, unsigned int *bytes_to_encr);
74
75
76err_status_t
77null_cipher_encrypt_aligned(null_cipher_ctx_t *c,
78			    unsigned char *buf, int bytes_to_encr);
79
80#endif /* NULL_CIPHER_H */
81