Nonce: Let get_nonce, allocate_nonce return boolean
[strongswan.git] / src / libstrongswan / crypto / nonce_gen.h
1 /*
2 * Copyright (C) 2012 Adrian-Ken Rueegsegger
3 * Hochschule fuer Technik Rapperswil
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * for more details.
14 */
15
16 /**
17 * @defgroup nonce_gen nonce_gen
18 * @{ @ingroup crypto
19 */
20
21 #ifndef NONCE_GEN_H_
22 #define NONCE_GEN_H_
23
24 typedef struct nonce_gen_t nonce_gen_t;
25
26 #include <library.h>
27
28 /**
29 * Generic interface for nonce generators.
30 */
31 struct nonce_gen_t {
32
33 /**
34 * Generates a nonce and writes it into the buffer.
35 *
36 * @param size size of nonce in bytes
37 * @param buffer pointer where the generated nonce will be written
38 * @return TRUE if nonce allocation was succesful, FALSE otherwise
39 */
40 bool (*get_nonce) (nonce_gen_t *this, size_t size, u_int8_t *buffer);
41
42 /**
43 * Generates a nonce and allocates space for it.
44 *
45 * @param size size of nonce in bytes
46 * @param chunk chunk which will hold the generated nonce
47 * @return TRUE if nonce allocation was succesful, FALSE otherwise
48 */
49 bool (*allocate_nonce) (nonce_gen_t *this, size_t size, chunk_t *chunk);
50
51 /**
52 * Destroys a nonce generator object.
53 */
54 void (*destroy) (nonce_gen_t *this);
55 };
56
57 #endif /** NONCE_GEN_H_ @}*/