| 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 | |