linux-imx

/*

 * SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and

 * described at https://tools.ietf.org/html/draft-shen-sm3-hash-01

 *

 * Copyright (C) 2017 ARM Limited or its affiliates.

 * Written by Gilad Ben-Yossef <gilad@benyossef.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, see <http://www.gnu.org/licenses/>.

 */

​

#include <crypto/internal/hash.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/mm.h>

#include <linux/types.h>

#include <crypto/sm3.h>

#include <crypto/sm3_base.h>

#include <linux/bitops.h>

#include <asm/byteorder.h>

#include <asm/unaligned.h>

​

const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = {

    0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F,

    0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x1A, 0x8F,

    0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0xFB, 0x74,

    0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B

};

EXPORT_SYMBOL_GPL(sm3_zero_message_hash);

​

static inline u32 p0(u32 x)

{

    return x ^ rol32(x, 9) ^ rol32(x, 17);

}

​

static inline u32 p1(u32 x)

{

    return x ^ rol32(x, 15) ^ rol32(x, 23);

}

​

static inline u32 ff(unsigned int n, u32 a, u32 b, u32 c)

{

    return (n < 16) ? (a ^ b ^ c) : ((a & b) | (a & c) | (b & c));

}

​

static inline u32 gg(unsigned int n, u32 e, u32 f, u32 g)

{

    return (n < 16) ? (e ^ f ^ g) : ((e & f) | ((~e) & g));

}

​

static inline u32 t(unsigned int n)

{

    return (n < 16) ? SM3_T1 : SM3_T2;

}