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
17 MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions");
18 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
19 MODULE_LICENSE("GPL v2");
20
21 asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src,
22 int blocks);
23
sm3_ce_update(struct shash_desc * desc,const u8 * data,unsigned int len)24 static 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
sm3_ce_finup(struct shash_desc * desc,const u8 * data,unsigned int len,u8 * out)35 static 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
44 static 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
sm3_ce_mod_init(void)59 static int __init sm3_ce_mod_init(void)
60 {
61 return crypto_register_shash(&sm3_alg);
62 }
63
sm3_ce_mod_fini(void)64 static void __exit sm3_ce_mod_fini(void)
65 {
66 crypto_unregister_shash(&sm3_alg);
67 }
68
69 module_cpu_feature_match(SM3, sm3_ce_mod_init);
70 module_exit(sm3_ce_mod_fini);
71