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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/*
* Copyright (C) 2005-2009 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 signer signer
* @{ @ingroup crypto
*/
#ifndef SIGNER_H_
#define SIGNER_H_
typedef enum integrity_algorithm_t integrity_algorithm_t;
typedef struct signer_t signer_t;
#include <library.h>
/**
* Integrity algorithm, as in IKEv2 RFC 3.3.2.
*
* Algorithms not specified in IKEv2 are allocated in private use space.
*/
enum integrity_algorithm_t {
AUTH_UNDEFINED = 1024,
/** RFC4306 */
AUTH_HMAC_MD5_96 = 1,
/** RFC4306 */
AUTH_HMAC_SHA1_96 = 2,
/** RFC4306 */
AUTH_DES_MAC = 3,
/** RFC1826 */
AUTH_KPDK_MD5 = 4,
/** RFC4306 */
AUTH_AES_XCBC_96 = 5,
/** RFC4595 */
AUTH_HMAC_MD5_128 = 6,
/** RFC4595 */
AUTH_HMAC_SHA1_160 = 7,
/** RFC4494 */
AUTH_AES_CMAC_96 = 8,
/** RFC4543 */
AUTH_AES_128_GMAC = 9,
/** RFC4543 */
AUTH_AES_192_GMAC = 10,
/** RFC4543 */
AUTH_AES_256_GMAC = 11,
/** RFC4868 */
AUTH_HMAC_SHA2_256_128 = 12,
/** RFC4868 */
AUTH_HMAC_SHA2_384_192 = 13,
/** RFC4868 */
AUTH_HMAC_SHA2_512_256 = 14,
/** private use */
AUTH_HMAC_SHA1_128 = 1025,
/** SHA256 96 bit truncation variant, supported by Linux kernels */
AUTH_HMAC_SHA2_256_96 = 1026,
/** SHA256 full length truncation variant, as used in TLS */
AUTH_HMAC_SHA2_256_256 = 1027,
/** SHA384 full length truncation variant, as used in TLS */
AUTH_HMAC_SHA2_384_384 = 1028,
/** draft-kanno-ipsecme-camellia-xcbc, not yet assigned by IANA */
AUTH_CAMELLIA_XCBC_96 = 1029,
};
/**
* enum names for integrity_algorithm_t.
*/
extern enum_name_t *integrity_algorithm_names;
/**
* Generic interface for a symmetric signature algorithm.
*/
struct signer_t {
/**
* Generate a signature.
*
* If buffer is NULL, data is processed and prepended to a next call until
* buffer is a valid pointer.
*
* @param data a chunk containing the data to sign
* @param buffer pointer where the signature will be written
*/
void (*get_signature) (signer_t *this, chunk_t data, u_int8_t *buffer);
/**
* Generate a signature and allocate space for it.
*
* If chunk is NULL, data is processed and prepended to a next call until
* chunk is a valid chunk pointer.
*
* @param data a chunk containing the data to sign
* @param chunk chunk which will hold the allocated signature
*/
void (*allocate_signature) (signer_t *this, chunk_t data, chunk_t *chunk);
/**
* Verify a signature.
*
* To verify a signature of multiple chunks of data, pass the
* data to get_signature() with a NULL buffer. verify_signature() acts
* as a final call and includes all data fed to get_signature().
*
* @param data a chunk containing the data to verify
* @param signature a chunk containing the signature
* @return TRUE, if signature is valid, FALSE otherwise
*/
bool (*verify_signature) (signer_t *this, chunk_t data, chunk_t signature);
/**
* Get the block size of this signature algorithm.
*
* @return block size in bytes
*/
size_t (*get_block_size) (signer_t *this);
/**
* Get the key size of the signature algorithm.
*
* @return key size in bytes
*/
size_t (*get_key_size) (signer_t *this);
/**
* Set the key for this object.
*
* @param key key to set
*/
void (*set_key) (signer_t *this, chunk_t key);
/**
* Destroys a signer_t object.
*/
void (*destroy) (signer_t *this);
};
#endif /** SIGNER_H_ @}*/
|
