hash.c revision 103763
1/*- 2 * Copyright (c) 2000 Mark R V Murray 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/dev/random/hash.c 103763 2002-09-21 21:40:02Z markm $ 27 */ 28 29#include <sys/param.h> 30#include <sys/systm.h> 31 32#include <crypto/rijndael/rijndael.h> 33#include <crypto/sha2/sha2.h> 34 35#include <dev/random/hash.h> 36 37/* initialise the hash */ 38void 39yarrow_hash_init(struct yarrowhash *context) 40{ 41 SHA256_Init(&context->sha); 42} 43 44/* iterate the hash */ 45void 46yarrow_hash_iterate(struct yarrowhash *context, void *data, size_t size) 47{ 48 SHA256_Update(&context->sha, data, size); 49} 50 51/* Conclude by returning the hash in the supplied /buf/ which must be 52 * KEYSIZE bytes long. 53 */ 54void 55yarrow_hash_finish(struct yarrowhash *context, void *buf) 56{ 57 SHA256_Final(buf, &context->sha); 58} 59 60/* Initialise the encryption routine by setting up the key schedule 61 * from the supplied /data/ which must be KEYSIZE bytes of binary 62 * data. 63 */ 64void 65yarrow_encrypt_init(struct yarrowkey *context, void *data) 66{ 67 rijndael_cipherInit(&context->cipher, MODE_CBC, NULL); 68 rijndael_makeKey(&context->key, DIR_ENCRYPT, KEYSIZE*8, data); 69} 70 71/* Encrypt the supplied data using the key schedule preset in the context. 72 * KEYSIZE bytes are encrypted from /d_in/ to /d_out/. 73 */ 74void 75yarrow_encrypt(struct yarrowkey *context, void *d_in, void *d_out) 76{ 77 rijndael_blockEncrypt(&context->cipher, &context->key, d_in, 78 KEYSIZE*8, d_out); 79} 80