Annotation of embedaddon/strongswan/src/libstrongswan/crypto/iv/iv_gen_rand.c, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (C) 2013 Tobias Brunner
3: * HSR 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: #include "iv_gen_rand.h"
17:
18: #include <library.h>
19:
20: typedef struct private_iv_gen_t private_iv_gen_t;
21:
22: /**
23: * Private data of an iv_gen_t object.
24: */
25: struct private_iv_gen_t {
26:
27: /**
28: * Public iv_gen_t interface.
29: */
30: iv_gen_t public;
31:
32: /**
33: * rng_t object
34: */
35: rng_t *rng;
36: };
37:
38: METHOD(iv_gen_t, get_iv, bool,
39: private_iv_gen_t *this, uint64_t seq, size_t size, uint8_t *buffer)
40: {
41: if (!this->rng)
42: {
43: return FALSE;
44: }
45: return this->rng->get_bytes(this->rng, size, buffer);
46: }
47:
48: METHOD(iv_gen_t, allocate_iv, bool,
49: private_iv_gen_t *this, uint64_t seq, size_t size, chunk_t *chunk)
50: {
51: if (!this->rng)
52: {
53: return FALSE;
54: }
55: return this->rng->allocate_bytes(this->rng, size, chunk);
56: }
57:
58: METHOD(iv_gen_t, destroy, void,
59: private_iv_gen_t *this)
60: {
61: DESTROY_IF(this->rng);
62: free(this);
63: }
64:
65: iv_gen_t *iv_gen_rand_create()
66: {
67: private_iv_gen_t *this;
68:
69: INIT(this,
70: .public = {
71: .get_iv = _get_iv,
72: .allocate_iv = _allocate_iv,
73: .destroy = _destroy,
74: },
75: .rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK),
76: );
77:
78: return &this->public;
79: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>