iPXE
sha224.c
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00001 /*
00002  * Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>.
00003  *
00004  * This program is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU General Public License as
00006  * published by the Free Software Foundation; either version 2 of the
00007  * License, or any later version.
00008  *
00009  * This program is distributed in the hope that it will be useful, but
00010  * WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software
00016  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00017  * 02110-1301, USA.
00018  *
00019  * You can also choose to distribute this program under the terms of
00020  * the Unmodified Binary Distribution Licence (as given in the file
00021  * COPYING.UBDL), provided that you have satisfied its requirements.
00022  */
00023 
00024 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
00025 
00026 /** @file
00027  *
00028  * SHA-224 algorithm
00029  *
00030  */
00031 
00032 #include <stdint.h>
00033 #include <byteswap.h>
00034 #include <ipxe/crypto.h>
00035 #include <ipxe/asn1.h>
00036 #include <ipxe/sha256.h>
00037 
00038 /** SHA-224 initial digest values */
00039 static const struct sha256_digest sha224_init_digest = {
00040         .h = {
00041                 cpu_to_be32 ( 0xc1059ed8 ),
00042                 cpu_to_be32 ( 0x367cd507 ),
00043                 cpu_to_be32 ( 0x3070dd17 ),
00044                 cpu_to_be32 ( 0xf70e5939 ),
00045                 cpu_to_be32 ( 0xffc00b31 ),
00046                 cpu_to_be32 ( 0x68581511 ),
00047                 cpu_to_be32 ( 0x64f98fa7 ),
00048                 cpu_to_be32 ( 0xbefa4fa4 ),
00049         },
00050 };
00051 
00052 /**
00053  * Initialise SHA-224 algorithm
00054  *
00055  * @v ctx               SHA-224 context
00056  */
00057 static void sha224_init ( void *ctx ) {
00058         struct sha256_context *context = ctx;
00059 
00060         sha256_family_init ( context, &sha224_init_digest, SHA224_DIGEST_SIZE );
00061 }
00062 
00063 /** SHA-224 algorithm */
00064 struct digest_algorithm sha224_algorithm = {
00065         .name           = "sha224",
00066         .ctxsize        = sizeof ( struct sha256_context ),
00067         .blocksize      = sizeof ( union sha256_block ),
00068         .digestsize     = SHA224_DIGEST_SIZE,
00069         .init           = sha224_init,
00070         .update         = sha256_update,
00071         .final          = sha256_final,
00072 };
00073 
00074 /** "sha224" object identifier */
00075 static uint8_t oid_sha224[] = { ASN1_OID_SHA224 };
00076 
00077 /** "sha224" OID-identified algorithm */
00078 struct asn1_algorithm oid_sha224_algorithm __asn1_algorithm = {
00079         .name = "sha224",
00080         .digest = &sha224_algorithm,
00081         .oid = ASN1_OID_CURSOR ( oid_sha224 ),
00082 };