tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * sha512-glue.c - accelerated SHA-384/512 for ARM
3 *
4 * Copyright (C) 2015 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 <crypto/internal/hash.h>
12#include <crypto/sha.h>
13#include <crypto/sha512_base.h>
14#include <linux/crypto.h>
15#include <linux/module.h>
16
17#include <asm/hwcap.h>
18#include <asm/neon.h>
19
20#include "sha512.h"
21
22MODULE_DESCRIPTION("Accelerated SHA-384/SHA-512 secure hash for ARM");
23MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
24MODULE_LICENSE("GPL v2");
25
26MODULE_ALIAS_CRYPTO("sha384");
27MODULE_ALIAS_CRYPTO("sha512");
28MODULE_ALIAS_CRYPTO("sha384-arm");
29MODULE_ALIAS_CRYPTO("sha512-arm");
30
31asmlinkage void sha512_block_data_order(u64 *state, u8 const *src, int blocks);
32
33int sha512_arm_update(struct shash_desc *desc, const u8 *data,
34 unsigned int len)
35{
36 return sha512_base_do_update(desc, data, len,
37 (sha512_block_fn *)sha512_block_data_order);
38}
39
40int sha512_arm_final(struct shash_desc *desc, u8 *out)
41{
42 sha512_base_do_finalize(desc,
43 (sha512_block_fn *)sha512_block_data_order);
44 return sha512_base_finish(desc, out);
45}
46
47int sha512_arm_finup(struct shash_desc *desc, const u8 *data,
48 unsigned int len, u8 *out)
49{
50 sha512_base_do_update(desc, data, len,
51 (sha512_block_fn *)sha512_block_data_order);
52 return sha512_arm_final(desc, out);
53}
54
55static struct shash_alg sha512_arm_algs[] = { {
56 .init = sha384_base_init,
57 .update = sha512_arm_update,
58 .final = sha512_arm_final,
59 .finup = sha512_arm_finup,
60 .descsize = sizeof(struct sha512_state),
61 .digestsize = SHA384_DIGEST_SIZE,
62 .base = {
63 .cra_name = "sha384",
64 .cra_driver_name = "sha384-arm",
65 .cra_priority = 250,
66 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
67 .cra_blocksize = SHA512_BLOCK_SIZE,
68 .cra_module = THIS_MODULE,
69 }
70}, {
71 .init = sha512_base_init,
72 .update = sha512_arm_update,
73 .final = sha512_arm_final,
74 .finup = sha512_arm_finup,
75 .descsize = sizeof(struct sha512_state),
76 .digestsize = SHA512_DIGEST_SIZE,
77 .base = {
78 .cra_name = "sha512",
79 .cra_driver_name = "sha512-arm",
80 .cra_priority = 250,
81 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
82 .cra_blocksize = SHA512_BLOCK_SIZE,
83 .cra_module = THIS_MODULE,
84 }
85} };
86
87static int __init sha512_arm_mod_init(void)
88{
89 int err;
90
91 err = crypto_register_shashes(sha512_arm_algs,
92 ARRAY_SIZE(sha512_arm_algs));
93 if (err)
94 return err;
95
96 if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon()) {
97 err = crypto_register_shashes(sha512_neon_algs,
98 ARRAY_SIZE(sha512_neon_algs));
99 if (err)
100 goto err_unregister;
101 }
102 return 0;
103
104err_unregister:
105 crypto_unregister_shashes(sha512_arm_algs,
106 ARRAY_SIZE(sha512_arm_algs));
107
108 return err;
109}
110
111static void __exit sha512_arm_mod_fini(void)
112{
113 crypto_unregister_shashes(sha512_arm_algs,
114 ARRAY_SIZE(sha512_arm_algs));
115 if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon())
116 crypto_unregister_shashes(sha512_neon_algs,
117 ARRAY_SIZE(sha512_neon_algs));
118}
119
120module_init(sha512_arm_mod_init);
121module_exit(sha512_arm_mod_fini);