[linux-block.git] / crypto / sm3_generic.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * 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>
 * Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
 */

#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 int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
			  unsigned int len)
{
	sm3_update(shash_desc_ctx(desc), data, len);
	return 0;
}

static int crypto_sm3_final(struct shash_desc *desc, u8 *out)
{
	sm3_final(shash_desc_ctx(desc), out);
	return 0;
}

static int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
			unsigned int len, u8 *hash)
{
	struct sm3_state *sctx = shash_desc_ctx(desc);

	if (len)
		sm3_update(sctx, data, len);
	sm3_final(sctx, hash);
	return 0;
}

static struct shash_alg sm3_alg = {
	.digestsize	=	SM3_DIGEST_SIZE,
	.init		=	sm3_base_init,
	.update		=	crypto_sm3_update,
	.final		=	crypto_sm3_final,
	.finup		=	crypto_sm3_finup,
	.descsize	=	sizeof(struct sm3_state),
	.base		=	{
		.cra_name	 =	"sm3",
		.cra_driver_name =	"sm3-generic",
		.cra_priority	=	100,
		.cra_blocksize	 =	SM3_BLOCK_SIZE,
		.cra_module	 =	THIS_MODULE,
	}
};

static int __init sm3_generic_mod_init(void)
{
	return crypto_register_shash(&sm3_alg);
}

static void __exit sm3_generic_mod_fini(void)
{
	crypto_unregister_shash(&sm3_alg);
}

subsys_initcall(sm3_generic_mod_init);
module_exit(sm3_generic_mod_fini);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("SM3 Secure Hash Algorithm");

MODULE_ALIAS_CRYPTO("sm3");
MODULE_ALIAS_CRYPTO("sm3-generic");
Commit	Line	Data
caab277b	1	// SPDX-License-Identifier: GPL-2.0-only
4f0fc160 GBY	2	/*
	3	* SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and
	4	* described at https://tools.ietf.org/html/draft-shen-sm3-hash-01
	5	*
	6	* Copyright (C) 2017 ARM Limited or its affiliates.
	7	* Written by Gilad Ben-Yossef <gilad@benyossef.com>
b4784a45	8	* Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
4f0fc160 GBY	9	*/
	10
	11	#include <crypto/internal/hash.h>
	12	#include <linux/init.h>
	13	#include <linux/module.h>
	14	#include <linux/mm.h>
	15	#include <linux/types.h>
	16	#include <crypto/sm3.h>
	17	#include <crypto/sm3_base.h>
	18	#include <linux/bitops.h>
	19	#include <asm/byteorder.h>
	20	#include <asm/unaligned.h>
	21
	22	const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = {
	23	0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F,
	24	0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x1A, 0x8F,
	25	0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0xFB, 0x74,
	26	0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B
	27	};
	28	EXPORT_SYMBOL_GPL(sm3_zero_message_hash);
	29
b4784a45	30	static int crypto_sm3_update(struct shash_desc desc, const u8 data,
4f0fc160 GBY	31	unsigned int len)
4f0fc160 GBY	32	{
b4784a45 TZ	33	sm3_update(shash_desc_ctx(desc), data, len);
b4784a45 TZ	34	return 0;
4f0fc160	35	}
4f0fc160	36
b4784a45	37	static int crypto_sm3_final(struct shash_desc desc, u8 out)
4f0fc160	38	{
b4784a45 TZ	39	sm3_final(shash_desc_ctx(desc), out);
b4784a45 TZ	40	return 0;
4f0fc160 GBY	41	}
4f0fc160 GBY	42
b4784a45	43	static int crypto_sm3_finup(struct shash_desc desc, const u8 data,
4f0fc160 GBY	44	unsigned int len, u8 *hash)
4f0fc160 GBY	45	{
b4784a45 TZ	46	struct sm3_state *sctx = shash_desc_ctx(desc);
	47
	48	if (len)
	49	sm3_update(sctx, data, len);
	50	sm3_final(sctx, hash);
	51	return 0;
4f0fc160	52	}
4f0fc160 GBY	53
	54	static struct shash_alg sm3_alg = {
	55	.digestsize = SM3_DIGEST_SIZE,
	56	.init = sm3_base_init,
	57	.update = crypto_sm3_update,
f4928287	58	.final = crypto_sm3_final,
4f0fc160 GBY	59	.finup = crypto_sm3_finup,
	60	.descsize = sizeof(struct sm3_state),
	61	.base = {
	62	.cra_name = "sm3",
	63	.cra_driver_name = "sm3-generic",
b4784a45	64	.cra_priority = 100,
4f0fc160 GBY	65	.cra_blocksize = SM3_BLOCK_SIZE,
	66	.cra_module = THIS_MODULE,
	67	}
	68	};
	69
	70	static int __init sm3_generic_mod_init(void)
	71	{
	72	return crypto_register_shash(&sm3_alg);
	73	}
	74
	75	static void __exit sm3_generic_mod_fini(void)
	76	{
	77	crypto_unregister_shash(&sm3_alg);
	78	}
	79
c4741b23	80	subsys_initcall(sm3_generic_mod_init);
4f0fc160 GBY	81	module_exit(sm3_generic_mod_fini);
	82
	83	MODULE_LICENSE("GPL v2");
	84	MODULE_DESCRIPTION("SM3 Secure Hash Algorithm");
	85
	86	MODULE_ALIAS_CRYPTO("sm3");
	87	MODULE_ALIAS_CRYPTO("sm3-generic");