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