1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * sm3-ce-glue.c - SM3 secure hash using ARMv8.2 Crypto Extensions
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <asm/neon.h>
9*4882a593Smuzhiyun #include <asm/simd.h>
10*4882a593Smuzhiyun #include <asm/unaligned.h>
11*4882a593Smuzhiyun #include <crypto/internal/hash.h>
12*4882a593Smuzhiyun #include <crypto/internal/simd.h>
13*4882a593Smuzhiyun #include <crypto/sm3.h>
14*4882a593Smuzhiyun #include <crypto/sm3_base.h>
15*4882a593Smuzhiyun #include <linux/cpufeature.h>
16*4882a593Smuzhiyun #include <linux/crypto.h>
17*4882a593Smuzhiyun #include <linux/module.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions");
20*4882a593Smuzhiyun MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
21*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src,
24*4882a593Smuzhiyun int blocks);
25*4882a593Smuzhiyun
sm3_ce_update(struct shash_desc * desc,const u8 * data,unsigned int len)26*4882a593Smuzhiyun static int sm3_ce_update(struct shash_desc *desc, const u8 *data,
27*4882a593Smuzhiyun unsigned int len)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun if (!crypto_simd_usable())
30*4882a593Smuzhiyun return crypto_sm3_update(desc, data, len);
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun kernel_neon_begin();
33*4882a593Smuzhiyun sm3_base_do_update(desc, data, len, sm3_ce_transform);
34*4882a593Smuzhiyun kernel_neon_end();
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun return 0;
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
sm3_ce_final(struct shash_desc * desc,u8 * out)39*4882a593Smuzhiyun static int sm3_ce_final(struct shash_desc *desc, u8 *out)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun if (!crypto_simd_usable())
42*4882a593Smuzhiyun return crypto_sm3_finup(desc, NULL, 0, out);
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun kernel_neon_begin();
45*4882a593Smuzhiyun sm3_base_do_finalize(desc, sm3_ce_transform);
46*4882a593Smuzhiyun kernel_neon_end();
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun return sm3_base_finish(desc, out);
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
sm3_ce_finup(struct shash_desc * desc,const u8 * data,unsigned int len,u8 * out)51*4882a593Smuzhiyun static int sm3_ce_finup(struct shash_desc *desc, const u8 *data,
52*4882a593Smuzhiyun unsigned int len, u8 *out)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun if (!crypto_simd_usable())
55*4882a593Smuzhiyun return crypto_sm3_finup(desc, data, len, out);
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun kernel_neon_begin();
58*4882a593Smuzhiyun sm3_base_do_update(desc, data, len, sm3_ce_transform);
59*4882a593Smuzhiyun kernel_neon_end();
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun return sm3_ce_final(desc, out);
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun static struct shash_alg sm3_alg = {
65*4882a593Smuzhiyun .digestsize = SM3_DIGEST_SIZE,
66*4882a593Smuzhiyun .init = sm3_base_init,
67*4882a593Smuzhiyun .update = sm3_ce_update,
68*4882a593Smuzhiyun .final = sm3_ce_final,
69*4882a593Smuzhiyun .finup = sm3_ce_finup,
70*4882a593Smuzhiyun .descsize = sizeof(struct sm3_state),
71*4882a593Smuzhiyun .base.cra_name = "sm3",
72*4882a593Smuzhiyun .base.cra_driver_name = "sm3-ce",
73*4882a593Smuzhiyun .base.cra_blocksize = SM3_BLOCK_SIZE,
74*4882a593Smuzhiyun .base.cra_module = THIS_MODULE,
75*4882a593Smuzhiyun .base.cra_priority = 200,
76*4882a593Smuzhiyun };
77*4882a593Smuzhiyun
sm3_ce_mod_init(void)78*4882a593Smuzhiyun static int __init sm3_ce_mod_init(void)
79*4882a593Smuzhiyun {
80*4882a593Smuzhiyun return crypto_register_shash(&sm3_alg);
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun
sm3_ce_mod_fini(void)83*4882a593Smuzhiyun static void __exit sm3_ce_mod_fini(void)
84*4882a593Smuzhiyun {
85*4882a593Smuzhiyun crypto_unregister_shash(&sm3_alg);
86*4882a593Smuzhiyun }
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun module_cpu_feature_match(SM3, sm3_ce_mod_init);
89*4882a593Smuzhiyun module_exit(sm3_ce_mod_fini);
90