[efi] Disable EFI watchdog timer when shutting down to boot an OS
[ipxe.git] / src / crypto / sha512_256.c
1 /*
2 * Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 *
19 * You can also choose to distribute this program under the terms of
20 * the Unmodified Binary Distribution Licence (as given in the file
21 * COPYING.UBDL), provided that you have satisfied its requirements.
22 */
23
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
25
26 /** @file
27 *
28 * SHA-512/256 algorithm
29 *
30 */
31
32 #include <stdint.h>
33 #include <byteswap.h>
34 #include <ipxe/crypto.h>
35 #include <ipxe/sha512.h>
36
37 /** SHA-512/256 initial digest values */
38 static const struct sha512_digest sha512_256_init_digest = {
39 .h = {
40 cpu_to_be64 ( 0x22312194fc2bf72cULL ),
41 cpu_to_be64 ( 0x9f555fa3c84c64c2ULL ),
42 cpu_to_be64 ( 0x2393b86b6f53b151ULL ),
43 cpu_to_be64 ( 0x963877195940eabdULL ),
44 cpu_to_be64 ( 0x96283ee2a88effe3ULL ),
45 cpu_to_be64 ( 0xbe5e1e2553863992ULL ),
46 cpu_to_be64 ( 0x2b0199fc2c85b8aaULL ),
47 cpu_to_be64 ( 0x0eb72ddc81c52ca2ULL ),
48 },
49 };
50
51 /**
52 * Initialise SHA-512/256 algorithm
53 *
54 * @v ctx SHA-512/256 context
55 */
56 static void sha512_256_init ( void *ctx ) {
57 struct sha512_context *context = ctx;
58
59 sha512_family_init ( context, &sha512_256_init_digest,
60 SHA512_256_DIGEST_SIZE );
61 }
62
63 /** SHA-512/256 algorithm */
64 struct digest_algorithm sha512_256_algorithm = {
65 .name = "sha512/256",
66 .ctxsize = sizeof ( struct sha512_context ),
67 .blocksize = sizeof ( union sha512_block ),
68 .digestsize = SHA512_256_DIGEST_SIZE,
69 .init = sha512_256_init,
70 .update = sha512_update,
71 .final = sha512_final,
72 };