1 /*
2 * sm3-ce-glue.c - SM3 secure hash using ARMv8.2 Crypto Extensions
3 *
4 * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <asm/neon.h>
12 #include <asm/simd.h>
13 #include <asm/unaligned.h>
14 #include <crypto/internal/hash.h>
15 #include <crypto/sm3.h>
16 #include <crypto/sm3_base.h>
17 #include <linux/cpufeature.h>
18 #include <linux/crypto.h>
19 #include <linux/module.h>
20
21 MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions");
22 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
23 MODULE_LICENSE("GPL v2");
24
25 asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src,
26 int blocks);
27
sm3_ce_update(struct shash_desc * desc,const u8 * data,unsigned int len)28 static int sm3_ce_update(struct shash_desc *desc, const u8 *data,
29 unsigned int len)
30 {
31 if (!may_use_simd())
32 return crypto_sm3_update(desc, data, len);
33
34 kernel_neon_begin();
35 sm3_base_do_update(desc, data, len, sm3_ce_transform);
36 kernel_neon_end();
37
38 return 0;
39 }
40
sm3_ce_final(struct shash_desc * desc,u8 * out)41 static int sm3_ce_final(struct shash_desc *desc, u8 *out)
42 {
43 if (!may_use_simd())
44 return crypto_sm3_finup(desc, NULL, 0, out);
45
46 kernel_neon_begin();
47 sm3_base_do_finalize(desc, sm3_ce_transform);
48 kernel_neon_end();
49
50 return sm3_base_finish(desc, out);
51 }
52
sm3_ce_finup(struct shash_desc * desc,const u8 * data,unsigned int len,u8 * out)53 static int sm3_ce_finup(struct shash_desc *desc, const u8 *data,
54 unsigned int len, u8 *out)
55 {
56 if (!may_use_simd())
57 return crypto_sm3_finup(desc, data, len, out);
58
59 kernel_neon_begin();
60 sm3_base_do_update(desc, data, len, sm3_ce_transform);
61 kernel_neon_end();
62
63 return sm3_ce_final(desc, out);
64 }
65
66 static struct shash_alg sm3_alg = {
67 .digestsize = SM3_DIGEST_SIZE,
68 .init = sm3_base_init,
69 .update = sm3_ce_update,
70 .final = sm3_ce_final,
71 .finup = sm3_ce_finup,
72 .descsize = sizeof(struct sm3_state),
73 .base.cra_name = "sm3",
74 .base.cra_driver_name = "sm3-ce",
75 .base.cra_blocksize = SM3_BLOCK_SIZE,
76 .base.cra_module = THIS_MODULE,
77 .base.cra_priority = 200,
78 };
79
sm3_ce_mod_init(void)80 static int __init sm3_ce_mod_init(void)
81 {
82 return crypto_register_shash(&sm3_alg);
83 }
84
sm3_ce_mod_fini(void)85 static void __exit sm3_ce_mod_fini(void)
86 {
87 crypto_unregister_shash(&sm3_alg);
88 }
89
90 module_cpu_feature_match(SM3, sm3_ce_mod_init);
91 module_exit(sm3_ce_mod_fini);
92
