sm3-ce-glue.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * sm3-ce-glue.c - SM3 secure hash using ARMv8.2 Crypto Extensions
 4 *
 5 * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
 6 */
 7
 8#include <crypto/internal/hash.h>
 9#include <crypto/sm3.h>
10#include <crypto/sm3_base.h>
11#include <linux/cpufeature.h>
12#include <linux/kernel.h>
13#include <linux/module.h>
14
15#include <asm/simd.h>
16
17MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions");
18MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
19MODULE_LICENSE("GPL v2");
20
21asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src,
22				 int blocks);
23
24static int sm3_ce_update(struct shash_desc *desc, const u8 *data,
25			 unsigned int len)
26{
27	int remain;
28
29	scoped_ksimd() {
30		remain = sm3_base_do_update_blocks(desc, data, len, sm3_ce_transform);
31	}
32	return remain;
33}
34
35static int sm3_ce_finup(struct shash_desc *desc, const u8 *data,
36			unsigned int len, u8 *out)
37{
38	scoped_ksimd() {
39		sm3_base_do_finup(desc, data, len, sm3_ce_transform);
40	}
41	return sm3_base_finish(desc, out);
42}
43
44static struct shash_alg sm3_alg = {
45	.digestsize		= SM3_DIGEST_SIZE,
46	.init			= sm3_base_init,
47	.update			= sm3_ce_update,
48	.finup			= sm3_ce_finup,
49	.descsize		= SM3_STATE_SIZE,
50	.base.cra_name		= "sm3",
51	.base.cra_driver_name	= "sm3-ce",
52	.base.cra_flags		= CRYPTO_AHASH_ALG_BLOCK_ONLY |
53				  CRYPTO_AHASH_ALG_FINUP_MAX,
54	.base.cra_blocksize	= SM3_BLOCK_SIZE,
55	.base.cra_module	= THIS_MODULE,
56	.base.cra_priority	= 400,
57};
58
59static int __init sm3_ce_mod_init(void)
60{
61	return crypto_register_shash(&sm3_alg);
62}
63
64static void __exit sm3_ce_mod_fini(void)
65{
66	crypto_unregister_shash(&sm3_alg);
67}
68
69module_cpu_feature_match(SM3, sm3_ce_mod_init);
70module_exit(sm3_ce_mod_fini);