| 1 | /* $NetBSD: nist_ctr_drbg_aes128.h,v 1.2 2011/12/17 20:05:38 tls 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_AES128_H |
| 53 | #define NIST_CTR_DRBG_AES128_H |
| 54 | |
| 55 | /* Choose AES-128 as the underlying block cipher */ |
| 56 | #define NIST_BLOCK_KEYLEN (128) |
| 57 | #define NIST_BLOCK_KEYLEN_BYTES (NIST_BLOCK_KEYLEN / 8) |
| 58 | #define NIST_BLOCK_KEYLEN_INTS (NIST_BLOCK_KEYLEN_BYTES / sizeof(int)) |
| 59 | |
| 60 | #define NIST_BLOCK_OUTLEN (NIST_AES_BLOCKSIZEBITS) |
| 61 | #define NIST_BLOCK_OUTLEN_BYTES (NIST_BLOCK_OUTLEN / 8) |
| 62 | #define NIST_BLOCK_OUTLEN_INTS (NIST_BLOCK_OUTLEN_BYTES / sizeof(int)) |
| 63 | #define NIST_BLOCK_OUTLEN_LONGS (NIST_BLOCK_OUTLEN_BYTES / sizeof(long)) |
| 64 | |
| 65 | typedef NIST_AES_ENCRYPT_CTX NIST_Key; |
| 66 | |
| 67 | #define Block_Encrypt(ctx, src, dst) NIST_AES_ECB_Encrypt(ctx, src, dst) |
| 68 | #define Block_Schedule_Encryption(ctx, key) \ |
| 69 | NIST_AES_Schedule_Encryption(ctx, key, NIST_BLOCK_KEYLEN) |
| 70 | |
| 71 | /* |
| 72 | * NIST SP 800-90 March 2007 |
| 73 | * 10.2 DRBG Mechanism Based on Block Ciphers |
| 74 | * |
| 75 | * Table 3 specifies the reseed interval as |
| 76 | * <= 2^48. We use 2^31 so we can always be sure it'll fit in an int. |
| 77 | */ |
| 78 | #define NIST_CTR_DRBG_RESEED_INTERVAL (0x7fffffffU) |
| 79 | |
| 80 | #endif /* NIST_CTR_DRBG_AES128_H */ |
| 81 | |