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