1/*- |
2 * Copyright (c) 2000-2013 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. --- 10 unchanged lines hidden (view full) --- 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 */ 27 28#include <sys/cdefs.h> |
29__FBSDID("$FreeBSD: head/sys/dev/random/hash.c 255362 2013-09-07 14:15:13Z markm $"); |
30 31#include <sys/param.h> 32#include <sys/systm.h> 33 34#include <crypto/rijndael/rijndael-api-fst.h> 35#include <crypto/sha2/sha2.h> 36 37#include <dev/random/hash.h> 38 |
39/* Initialise the hash */ |
40void |
41randomdev_hash_init(struct randomdev_hash *context) |
42{ 43 SHA256_Init(&context->sha); 44} 45 |
46/* Iterate the hash */ |
47void |
48randomdev_hash_iterate(struct randomdev_hash *context, void *data, size_t size) |
49{ 50 SHA256_Update(&context->sha, data, size); 51} 52 |
53/* Conclude by returning the hash in the supplied <*buf> which must be |
54 * KEYSIZE bytes long. 55 */ 56void |
57randomdev_hash_finish(struct randomdev_hash *context, void *buf) |
58{ 59 SHA256_Final(buf, &context->sha); 60} 61 62/* Initialise the encryption routine by setting up the key schedule |
63 * from the supplied <*data> which must be KEYSIZE bytes of binary 64 * data. Use CBC mode for better avalanche. |
65 */ 66void |
67randomdev_encrypt_init(struct randomdev_key *context, void *data) |
68{ 69 rijndael_cipherInit(&context->cipher, MODE_CBC, NULL); 70 rijndael_makeKey(&context->key, DIR_ENCRYPT, KEYSIZE*8, data); 71} 72 73/* Encrypt the supplied data using the key schedule preset in the context. |
74 * <length> bytes are encrypted from <*d_in> to <*d_out>. <length> must be 75 * a multiple of BLOCKSIZE. |
76 */ 77void |
78randomdev_encrypt(struct randomdev_key *context, void *d_in, void *d_out, unsigned length) |
79{ |
80 rijndael_blockEncrypt(&context->cipher, &context->key, d_in, length*8, d_out); |
81} |