1 | /* $NetBSD: nist_ctr_drbg.h,v 1.2 2011/11/21 23:48:52 macallan Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2011 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Thor Lancelot Simon. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | /* |
33 | * Copyright (c) 2007 Henric Jungheim <software@henric.info> |
34 | * |
35 | * Permission to use, copy, modify, and distribute this software for any |
36 | * purpose with or without fee is hereby granted, provided that the above |
37 | * copyright notice and this permission notice appear in all copies. |
38 | * |
39 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
40 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
41 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
42 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
43 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
44 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
45 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
46 | */ |
47 | |
48 | /* |
49 | * NIST SP 800-90 CTR_DRBG (Random Number Generator) |
50 | */ |
51 | |
52 | #ifndef NIST_CTR_DRBG_H |
53 | #define NIST_CTR_DRBG_H |
54 | |
55 | #include <crypto/nist_ctr_drbg/nist_ctr_drbg_config.h> |
56 | |
57 | #define NIST_BLOCK_SEEDLEN (NIST_BLOCK_KEYLEN + NIST_BLOCK_OUTLEN) |
58 | #define NIST_BLOCK_SEEDLEN_BYTES (NIST_BLOCK_SEEDLEN / 8) |
59 | #define NIST_BLOCK_SEEDLEN_INTS (NIST_BLOCK_SEEDLEN_BYTES / sizeof(int)) |
60 | |
61 | typedef struct { |
62 | unsigned int reseed_counter; |
63 | NIST_Key ctx; |
64 | unsigned int V[NIST_BLOCK_OUTLEN_INTS] __attribute__ ((aligned(8))); |
65 | } NIST_CTR_DRBG; |
66 | |
67 | int nist_ctr_initialize(void); |
68 | int nist_ctr_drbg_generate(NIST_CTR_DRBG *, void *, int, const void *, int); |
69 | int nist_ctr_drbg_reseed(NIST_CTR_DRBG *, const void *, int, |
70 | const void *, int); |
71 | int nist_ctr_drbg_instantiate(NIST_CTR_DRBG *, const void *, int, |
72 | const void *, int, const void *, int); |
73 | int nist_ctr_drbg_destroy(NIST_CTR_DRBG *); |
74 | |
75 | #ifdef NIST_ZEROIZE |
76 | #define nist_zeroize(p, s) memset(p, 0, s) |
77 | #else |
78 | #define nist_zeroize(p, s) do { } while(0) |
79 | #endif |
80 | |
81 | #ifdef NIST_IS_LITTLE_ENDIAN /* Faster, as secure, won't pass KAT */ |
82 | #define NIST_HTONL(x) (x) |
83 | #define NIST_NTOHL(x) (x) |
84 | #else |
85 | static inline unsigned long |
86 | NIST_HTONL(unsigned long x) |
87 | { |
88 | switch(sizeof(long)) { |
89 | case 4: |
90 | return be32toh(x); |
91 | default: |
92 | return be64toh(x); |
93 | { |
94 | } |
95 | static inline unsigned long |
96 | NIST_NTOHL(unsigned long x) |
97 | { |
98 | switch(sizeof(long)) { |
99 | case 4: |
100 | return htobe32(x); |
101 | default: |
102 | return htobe64(x); |
103 | } |
104 | #endif |
105 | |
106 | #endif /* NIST_CTR_DRBG_H */ |
107 | |