[thirdparty/kernel/stable.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/cryptohash.h>
#include <linux/types.h>
#include <crypto/sha.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[SHA_WORKSPACE_WORDS];

	while (blocks--) {
		sha_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>
1da177e4	18	#include <linux/cryptohash.h>
06ace7a9	19	#include <linux/types.h>
5265eeb2	20	#include <crypto/sha.h>
7c71f0f7	21	#include <crypto/sha1_base.h>
1da177e4 LT	22	#include <asm/byteorder.h>
1da177e4 LT	23
0c4c78de LC	24	const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE] = {
	25	0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d,
	26	0x32, 0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90,
	27	0xaf, 0xd8, 0x07, 0x09
	28	};
	29	EXPORT_SYMBOL_GPL(sha1_zero_message_hash);
	30
7c71f0f7 AB	31	static void sha1_generic_block_fn(struct sha1_state sst, u8 const src,
7c71f0f7 AB	32	int blocks)
1da177e4	33	{
7c71f0f7	34	u32 temp[SHA_WORKSPACE_WORDS];
54ccb367	35
7c71f0f7 AB	36	while (blocks--) {
	37	sha_transform(sst->state, src, temp);
	38	src += SHA1_BLOCK_SIZE;
	39	}
	40	memzero_explicit(temp, sizeof(temp));
1da177e4 LT	41	}
1da177e4 LT	42
7c390170	43	int crypto_sha1_update(struct shash_desc desc, const u8 data,
7c71f0f7	44	unsigned int len)
1da177e4	45	{
7c71f0f7	46	return sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
1da177e4	47	}
7c390170	48	EXPORT_SYMBOL(crypto_sha1_update);
1da177e4	49
54ccb367	50	static int sha1_final(struct shash_desc desc, u8 out)
1da177e4	51	{
7c71f0f7 AB	52	sha1_base_do_finalize(desc, sha1_generic_block_fn);
7c71f0f7 AB	53	return sha1_base_finish(desc, out);
1da177e4 LT	54	}
1da177e4 LT	55
7c71f0f7 AB	56	int crypto_sha1_finup(struct shash_desc desc, const u8 data,
7c71f0f7 AB	57	unsigned int len, u8 *out)
e2a7ce4e	58	{
7c71f0f7 AB	59	sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
7c71f0f7 AB	60	return sha1_final(desc, out);
e2a7ce4e	61	}
7c71f0f7	62	EXPORT_SYMBOL(crypto_sha1_finup);
e2a7ce4e	63
54ccb367 AKR	64	static struct shash_alg alg = {
54ccb367 AKR	65	.digestsize = SHA1_DIGEST_SIZE,
7c71f0f7	66	.init = sha1_base_init,
7c390170	67	.update = crypto_sha1_update,
54ccb367	68	.final = sha1_final,
7c71f0f7	69	.finup = crypto_sha1_finup,
e2a7ce4e	70	.descsize = sizeof(struct sha1_state),
54ccb367 AKR	71	.base = {
	72	.cra_name = "sha1",
	73	.cra_driver_name= "sha1-generic",
90ef3e48	74	.cra_priority = 100,
54ccb367 AKR	75	.cra_blocksize = SHA1_BLOCK_SIZE,
	76	.cra_module = THIS_MODULE,
	77	}
1da177e4 LT	78	};
1da177e4 LT	79
3af5b90b	80	static int __init sha1_generic_mod_init(void)
1da177e4	81	{
54ccb367	82	return crypto_register_shash(&alg);
1da177e4 LT	83	}
1da177e4 LT	84
3af5b90b	85	static void __exit sha1_generic_mod_fini(void)
1da177e4	86	{
54ccb367	87	crypto_unregister_shash(&alg);
1da177e4 LT	88	}
1da177e4 LT	89
c4741b23	90	subsys_initcall(sha1_generic_mod_init);
3af5b90b	91	module_exit(sha1_generic_mod_fini);
1da177e4 LT	92
	93	MODULE_LICENSE("GPL");
	94	MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
b3be9a6d	95
5d26a105	96	MODULE_ALIAS_CRYPTO("sha1");
3e14dcf7	97	MODULE_ALIAS_CRYPTO("sha1-generic");