blob: f23c6750ffb6e07cf5066fcdd2a168a940082591 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/*
* Copyright (C) 2012 Tobias Brunner
* Copyright (C) 2005-2008 Martin Willi
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
/**
* @defgroup mac mac
* @{ @ingroup crypto
*/
#ifndef MAC_H_
#define MAC_H_
typedef struct mac_t mac_t;
#include <library.h>
/**
* Generic interface for message authentication codes.
*
* Classes implementing this interface can use the PRF and signer wrappers.
*/
struct mac_t {
/**
* Generate message authentication code.
*
* If out is NULL, no result is given back. A next call will
* append the data to already supplied data. If out is not NULL,
* the mac of all apended data is calculated, written to out and the
* internal state is reset.
*
* @param data chunk of data to authenticate
* @param out pointer where the generated bytes will be written
* @return TRUE if mac generated successfully
*/
bool (*get_mac)(mac_t *this, chunk_t data,
uint8_t *out) __attribute__((warn_unused_result));
/**
* Get the size of the resulting MAC.
*
* @return block size in bytes
*/
size_t (*get_mac_size)(mac_t *this);
/**
* Set the key to be used for the MAC.
*
* Any key length must be accepted.
*
* @param key key to set
* @return TRUE if key set successfully
*/
bool (*set_key)(mac_t *this,
chunk_t key) __attribute__((warn_unused_result));
/**
* Destroys a mac_t object.
*/
void (*destroy) (mac_t *this);
};
#endif /** MAC_H_ @}*/
|
