1/* $NetBSD: nist_ctr_drbg_aes256.h,v 1.1 2011/11/19 22:51:22 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_AES256_H 53#define NIST_CTR_DRBG_AES256_H 54 55/* Choose AES-256 as the underlying block cipher */ 56#define NIST_BLOCK_KEYLEN (256) 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 65typedef 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_AES256_H */ 81