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 * $FreeBSD$ 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 */ 38 void 39 yarrow_hash_init(struct yarrowhash *context) 40 { 41 SHA256_Init(&context->sha); 42 } 43 44 /* iterate the hash */ 45 void 46 yarrow_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. Trailing data (less than KEYSIZE bytes) are 53 * not forgotten. 54 */ 55 void 56 yarrow_hash_finish(struct yarrowhash *context, void *buf) 57 { 58 SHA256_Final(buf, &context->sha); 59 } 60 61 /* Initialise the encryption routine by setting up the key schedule 62 * from the supplied /key/ which must be KEYSIZE bytes of binary 63 * data. 64 */ 65 void 66 yarrow_encrypt_init(struct yarrowkey *context, void *data) 67 { 68 rijndael_cipherInit(&context->cipher, MODE_CBC, NULL); 69 rijndael_makeKey(&context->key, DIR_ENCRYPT, KEYSIZE*8, data); 70 } 71 72 /* Encrypt the supplied data using the key schedule preset in the context. 73 * KEYSIZE bytes are encrypted from /d_in/ to /d_out/. 74 */ 75 void 76 yarrow_encrypt(struct yarrowkey *context, void *d_in, void *d_out) 77 { 78 rijndael_blockEncrypt(&context->cipher, &context->key, d_in, 79 KEYSIZE*8, d_out); 80 } 81