src/crypto/sha224.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-224 algorithm
  29  *
  30  */
  31
  32 #include <stdint.h>
  33 #include <byteswap.h>
  34 #include <ipxe/crypto.h>
  35 #include <ipxe/sha256.h>
  36
  37 /** SHA-224 initial digest values */
  38 static const struct sha256_digest sha224_init_digest = {
  39         .h = {
  40                 cpu_to_be32 ( 0xc1059ed8 ),
  41                 cpu_to_be32 ( 0x367cd507 ),
  42                 cpu_to_be32 ( 0x3070dd17 ),
  43                 cpu_to_be32 ( 0xf70e5939 ),
  44                 cpu_to_be32 ( 0xffc00b31 ),
  45                 cpu_to_be32 ( 0x68581511 ),
  46                 cpu_to_be32 ( 0x64f98fa7 ),
  47                 cpu_to_be32 ( 0xbefa4fa4 ),
  48         },
  49 };
  50
  51 /**
  52  * Initialise SHA-224 algorithm
  53  *
  54  * @v ctx               SHA-224 context
  55  */
  56 static void sha224_init ( void *ctx ) {
  57         struct sha256_context *context = ctx;
  58
  59         sha256_family_init ( context, &sha224_init_digest, SHA224_DIGEST_SIZE );
  60 }
  61
  62 /** SHA-224 algorithm */
  63 struct digest_algorithm sha224_algorithm = {
  64         .name           = "sha224",
  65         .ctxsize        = sizeof ( struct sha256_context ),
  66         .blocksize      = sizeof ( union sha256_block ),
  67         .digestsize     = SHA224_DIGEST_SIZE,
  68         .init           = sha224_init,
  69         .update         = sha256_update,
  70         .final          = sha256_final,
  71 };