[linux-block.git] / crypto / sha1_generic.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Cryptographic API.
 *
 * SHA1 Secure Hash Algorithm.
 *
 * Derived from cryptoapi implementation, adapted for in-place
 * scatterlist interface.
 *
 * Copyright (c) Alan Smithee.
 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
 * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
 */
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <crypto/sha1.h>
#include <crypto/sha1_base.h>
#include <asm/byteorder.h>

const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE] = {
	0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d,
	0x32, 0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90,
	0xaf, 0xd8, 0x07, 0x09
};
EXPORT_SYMBOL_GPL(sha1_zero_message_hash);

static void sha1_generic_block_fn(struct sha1_state *sst, u8 const *src,
				  int blocks)
{
	u32 temp[SHA1_WORKSPACE_WORDS];

	while (blocks--) {
		sha1_transform(sst->state, src, temp);
		src += SHA1_BLOCK_SIZE;
	}
	memzero_explicit(temp, sizeof(temp));
}

int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
		       unsigned int len)
{
	return sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
}
EXPORT_SYMBOL(crypto_sha1_update);

static int sha1_final(struct shash_desc *desc, u8 *out)
{
	sha1_base_do_finalize(desc, sha1_generic_block_fn);
	return sha1_base_finish(desc, out);
}

int crypto_sha1_finup(struct shash_desc *desc, const u8 *data,
		      unsigned int len, u8 *out)
{
	sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
	return sha1_final(desc, out);
}
EXPORT_SYMBOL(crypto_sha1_finup);

static struct shash_alg alg = {
	.digestsize	=	SHA1_DIGEST_SIZE,
	.init		=	sha1_base_init,
	.update		=	crypto_sha1_update,
	.final		=	sha1_final,
	.finup		=	crypto_sha1_finup,
	.descsize	=	sizeof(struct sha1_state),
	.base		=	{
		.cra_name	=	"sha1",
		.cra_driver_name=	"sha1-generic",
		.cra_priority	=	100,
		.cra_blocksize	=	SHA1_BLOCK_SIZE,
		.cra_module	=	THIS_MODULE,
	}
};

static int __init sha1_generic_mod_init(void)
{
	return crypto_register_shash(&alg);
}

static void __exit sha1_generic_mod_fini(void)
{
	crypto_unregister_shash(&alg);
}

subsys_initcall(sha1_generic_mod_init);
module_exit(sha1_generic_mod_fini);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");

MODULE_ALIAS_CRYPTO("sha1");
MODULE_ALIAS_CRYPTO("sha1-generic");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	* Cryptographic API.
	4	*
	5	* SHA1 Secure Hash Algorithm.
	6	*
	7	* Derived from cryptoapi implementation, adapted for in-place
	8	* scatterlist interface.
	9	*
	10	* Copyright (c) Alan Smithee.
	11	* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
	12	* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
1da177e4	13	*/
54ccb367	14	#include <crypto/internal/hash.h>
1da177e4 LT	15	#include <linux/init.h>
	16	#include <linux/module.h>
	17	#include <linux/mm.h>
06ace7a9	18	#include <linux/types.h>
a24d22b2	19	#include <crypto/sha1.h>
7c71f0f7	20	#include <crypto/sha1_base.h>
1da177e4 LT	21	#include <asm/byteorder.h>
1da177e4 LT	22
0c4c78de LC	23	const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE] = {
	24	0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d,
	25	0x32, 0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90,
	26	0xaf, 0xd8, 0x07, 0x09
	27	};
	28	EXPORT_SYMBOL_GPL(sha1_zero_message_hash);
	29
7c71f0f7 AB	30	static void sha1_generic_block_fn(struct sha1_state sst, u8 const src,
7c71f0f7 AB	31	int blocks)
1da177e4	32	{
6b0b0fa2	33	u32 temp[SHA1_WORKSPACE_WORDS];
54ccb367	34
7c71f0f7	35	while (blocks--) {
6b0b0fa2	36	sha1_transform(sst->state, src, temp);
7c71f0f7 AB	37	src += SHA1_BLOCK_SIZE;
	38	}
	39	memzero_explicit(temp, sizeof(temp));
1da177e4 LT	40	}
1da177e4 LT	41
7c390170	42	int crypto_sha1_update(struct shash_desc desc, const u8 data,
7c71f0f7	43	unsigned int len)
1da177e4	44	{
7c71f0f7	45	return sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
1da177e4	46	}
7c390170	47	EXPORT_SYMBOL(crypto_sha1_update);
1da177e4	48
54ccb367	49	static int sha1_final(struct shash_desc desc, u8 out)
1da177e4	50	{
7c71f0f7 AB	51	sha1_base_do_finalize(desc, sha1_generic_block_fn);
7c71f0f7 AB	52	return sha1_base_finish(desc, out);
1da177e4 LT	53	}
1da177e4 LT	54
7c71f0f7 AB	55	int crypto_sha1_finup(struct shash_desc desc, const u8 data,
7c71f0f7 AB	56	unsigned int len, u8 *out)
e2a7ce4e	57	{
7c71f0f7 AB	58	sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
7c71f0f7 AB	59	return sha1_final(desc, out);
e2a7ce4e	60	}
7c71f0f7	61	EXPORT_SYMBOL(crypto_sha1_finup);
e2a7ce4e	62
54ccb367 AKR	63	static struct shash_alg alg = {
54ccb367 AKR	64	.digestsize = SHA1_DIGEST_SIZE,
7c71f0f7	65	.init = sha1_base_init,
7c390170	66	.update = crypto_sha1_update,
54ccb367	67	.final = sha1_final,
7c71f0f7	68	.finup = crypto_sha1_finup,
e2a7ce4e	69	.descsize = sizeof(struct sha1_state),
54ccb367 AKR	70	.base = {
	71	.cra_name = "sha1",
	72	.cra_driver_name= "sha1-generic",
90ef3e48	73	.cra_priority = 100,
54ccb367 AKR	74	.cra_blocksize = SHA1_BLOCK_SIZE,
	75	.cra_module = THIS_MODULE,
	76	}
1da177e4 LT	77	};
1da177e4 LT	78
3af5b90b	79	static int __init sha1_generic_mod_init(void)
1da177e4	80	{
54ccb367	81	return crypto_register_shash(&alg);
1da177e4 LT	82	}
1da177e4 LT	83
3af5b90b	84	static void __exit sha1_generic_mod_fini(void)
1da177e4	85	{
54ccb367	86	crypto_unregister_shash(&alg);
1da177e4 LT	87	}
1da177e4 LT	88
c4741b23	89	subsys_initcall(sha1_generic_mod_init);
3af5b90b	90	module_exit(sha1_generic_mod_fini);
1da177e4 LT	91
	92	MODULE_LICENSE("GPL");
	93	MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
b3be9a6d	94
5d26a105	95	MODULE_ALIAS_CRYPTO("sha1");
3e14dcf7	96	MODULE_ALIAS_CRYPTO("sha1-generic");