[crypto] Add SHA-512/256 algorithm
SHA-512/256 is almost identical to SHA-512, with differing initial hash values and a truncated output length. This implementation has been verified using the NIST SHA-512/256 test vectors. Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Michael Brown
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/*
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* Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/** @file
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*
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* SHA-512/256 algorithm
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*
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*/
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#include <stdint.h>
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#include <byteswap.h>
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#include <ipxe/crypto.h>
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#include <ipxe/asn1.h>
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#include <ipxe/sha512.h>
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/** SHA-512/256 initial digest values */
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static const struct sha512_digest sha512_256_init_digest = {
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.h = {
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cpu_to_be64 ( 0x22312194fc2bf72cULL ),
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cpu_to_be64 ( 0x9f555fa3c84c64c2ULL ),
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cpu_to_be64 ( 0x2393b86b6f53b151ULL ),
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cpu_to_be64 ( 0x963877195940eabdULL ),
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cpu_to_be64 ( 0x96283ee2a88effe3ULL ),
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cpu_to_be64 ( 0xbe5e1e2553863992ULL ),
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cpu_to_be64 ( 0x2b0199fc2c85b8aaULL ),
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cpu_to_be64 ( 0x0eb72ddc81c52ca2ULL ),
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},
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};
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/**
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* Initialise SHA-512/256 algorithm
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*
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* @v ctx SHA-512/256 context
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*/
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static void sha512_256_init ( void *ctx ) {
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struct sha512_context *context = ctx;
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sha512_family_init ( context, &sha512_256_init_digest,
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SHA512_256_DIGEST_SIZE );
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}
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/** SHA-512/256 algorithm */
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struct digest_algorithm sha512_256_algorithm = {
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.name = "sha512/256",
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.ctxsize = sizeof ( struct sha512_context ),
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.blocksize = sizeof ( union sha512_block ),
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.digestsize = SHA512_256_DIGEST_SIZE,
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.init = sha512_256_init,
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.update = sha512_update,
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.final = sha512_final,
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};
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/** "sha512_256" object identifier */
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static uint8_t oid_sha512_256[] = { ASN1_OID_SHA512_256 };
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/** "sha512_256" OID-identified algorithm */
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struct asn1_algorithm oid_sha512_256_algorithm __asn1_algorithm = {
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.name = "sha512/256",
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.digest = &sha512_256_algorithm,
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.oid = ASN1_OID_CURSOR ( oid_sha512_256 ),
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};
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@ -181,6 +181,13 @@ struct asn1_builder_header {
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ASN1_OID_SINGLE ( 3 ), ASN1_OID_SINGLE ( 4 ), \
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ASN1_OID_SINGLE ( 2 ), ASN1_OID_SINGLE ( 4 )
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/** ASN.1 OID for id-sha512-256 (2.16.840.1.101.3.4.2.6) */
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#define ASN1_OID_SHA512_256 \
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ASN1_OID_INITIAL ( 2, 16 ), ASN1_OID_DOUBLE ( 840 ), \
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ASN1_OID_SINGLE ( 1 ), ASN1_OID_SINGLE ( 101 ), \
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ASN1_OID_SINGLE ( 3 ), ASN1_OID_SINGLE ( 4 ), \
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ASN1_OID_SINGLE ( 2 ), ASN1_OID_SINGLE ( 6 )
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/** ASN.1 OID for commonName (2.5.4.3) */
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#define ASN1_OID_COMMON_NAME \
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ASN1_OID_INITIAL ( 2, 5 ), ASN1_OID_SINGLE ( 4 ), \
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@ -78,6 +78,9 @@ struct sha512_context {
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/** SHA-384 digest size */
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#define SHA384_DIGEST_SIZE ( SHA512_DIGEST_SIZE * 384 / 512 )
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/** SHA-512/256 digest size */
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#define SHA512_256_DIGEST_SIZE ( SHA512_DIGEST_SIZE * 256 / 512 )
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extern void sha512_family_init ( struct sha512_context *context,
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const struct sha512_digest *init,
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size_t digestsize );
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@ -86,5 +89,6 @@ extern void sha512_final ( void *ctx, void *out );
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extern struct digest_algorithm sha512_algorithm;
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extern struct digest_algorithm sha384_algorithm;
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extern struct digest_algorithm sha512_256_algorithm;
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#endif /* IPXE_SHA512_H */
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@ -31,6 +31,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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*
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* http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA512.pdf
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* http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA384.pdf
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* http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA512_256.pdf
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*
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*/
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@ -101,6 +102,28 @@ DIGEST_TEST ( sha384_nist_abc_stu, &sha384_algorithm, DIGEST_NIST_ABC_STU,
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0x55, 0x7e, 0x2d, 0xb9, 0x66, 0xc3, 0xe9, 0xfa, 0x91,
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0x74, 0x60, 0x39 ) );
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/* Empty test vector (digest obtained from "shasum -a 512256 /dev/null") */
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DIGEST_TEST ( sha512_256_empty, &sha512_256_algorithm, DIGEST_EMPTY,
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DIGEST ( 0xc6, 0x72, 0xb8, 0xd1, 0xef, 0x56, 0xed, 0x28, 0xab,
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0x87, 0xc3, 0x62, 0x2c, 0x51, 0x14, 0x06, 0x9b, 0xdd,
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0x3a, 0xd7, 0xb8, 0xf9, 0x73, 0x74, 0x98, 0xd0, 0xc0,
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0x1e, 0xce, 0xf0, 0x96, 0x7a ) );
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/* NIST test vector "abc" */
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DIGEST_TEST ( sha512_256_nist_abc, &sha512_256_algorithm, DIGEST_NIST_ABC,
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DIGEST ( 0x53, 0x04, 0x8e, 0x26, 0x81, 0x94, 0x1e, 0xf9, 0x9b,
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0x2e, 0x29, 0xb7, 0x6b, 0x4c, 0x7d, 0xab, 0xe4, 0xc2,
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0xd0, 0xc6, 0x34, 0xfc, 0x6d, 0x46, 0xe0, 0xe2, 0xf1,
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0x31, 0x07, 0xe7, 0xaf, 0x23 ) );
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/* NIST test vector "abc...stu" */
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DIGEST_TEST ( sha512_256_nist_abc_stu, &sha512_256_algorithm,
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DIGEST_NIST_ABC_STU,
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DIGEST ( 0x39, 0x28, 0xe1, 0x84, 0xfb, 0x86, 0x90, 0xf8, 0x40,
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0xda, 0x39, 0x88, 0x12, 0x1d, 0x31, 0xbe, 0x65, 0xcb,
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0x9d, 0x3e, 0xf8, 0x3e, 0xe6, 0x14, 0x6f, 0xea, 0xc8,
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0x61, 0xe1, 0x9b, 0x56, 0x3a ) );
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/**
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* Perform SHA-512 family self-test
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*
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@ -114,12 +137,17 @@ static void sha512_test_exec ( void ) {
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digest_ok ( &sha384_empty );
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digest_ok ( &sha384_nist_abc );
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digest_ok ( &sha384_nist_abc_stu );
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digest_ok ( &sha512_256_empty );
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digest_ok ( &sha512_256_nist_abc );
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digest_ok ( &sha512_256_nist_abc_stu );
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/* Speed tests */
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DBG ( "SHA512 required %ld cycles per byte\n",
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digest_cost ( &sha512_algorithm ) );
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DBG ( "SHA384 required %ld cycles per byte\n",
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digest_cost ( &sha384_algorithm ) );
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DBG ( "SHA512/256 required %ld cycles per byte\n",
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digest_cost ( &sha512_256_algorithm ) );
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}
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/** SHA-512 family self-test */
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