1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * sha512-glue.c - accelerated SHA-384/512 for ARM
4 *
5 * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
6 */
7
8#include <crypto/internal/hash.h>
9#include <crypto/sha.h>
10#include <crypto/sha512_base.h>
11#include <linux/crypto.h>
12#include <linux/module.h>
13
14#include <asm/hwcap.h>
15#include <asm/neon.h>
16
17#include "sha512.h"
18
19MODULE_DESCRIPTION("Accelerated SHA-384/SHA-512 secure hash for ARM");
20MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
21MODULE_LICENSE("GPL v2");
22
23MODULE_ALIAS_CRYPTO("sha384");
24MODULE_ALIAS_CRYPTO("sha512");
25MODULE_ALIAS_CRYPTO("sha384-arm");
26MODULE_ALIAS_CRYPTO("sha512-arm");
27
28asmlinkage void sha512_block_data_order(u64 *state, u8 const *src, int blocks);
29
30int sha512_arm_update(struct shash_desc *desc, const u8 *data,
31		      unsigned int len)
32{
33	return sha512_base_do_update(desc, data, len,
34		(sha512_block_fn *)sha512_block_data_order);
35}
36
37static int sha512_arm_final(struct shash_desc *desc, u8 *out)
38{
39	sha512_base_do_finalize(desc,
40		(sha512_block_fn *)sha512_block_data_order);
41	return sha512_base_finish(desc, out);
42}
43
44int sha512_arm_finup(struct shash_desc *desc, const u8 *data,
45		     unsigned int len, u8 *out)
46{
47	sha512_base_do_update(desc, data, len,
48		(sha512_block_fn *)sha512_block_data_order);
49	return sha512_arm_final(desc, out);
50}
51
52static struct shash_alg sha512_arm_algs[] = { {
53	.init			= sha384_base_init,
54	.update			= sha512_arm_update,
55	.final			= sha512_arm_final,
56	.finup			= sha512_arm_finup,
57	.descsize		= sizeof(struct sha512_state),
58	.digestsize		= SHA384_DIGEST_SIZE,
59	.base			= {
60		.cra_name		= "sha384",
61		.cra_driver_name	= "sha384-arm",
62		.cra_priority		= 250,
63		.cra_blocksize		= SHA512_BLOCK_SIZE,
64		.cra_module		= THIS_MODULE,
65	}
66},  {
67	.init			= sha512_base_init,
68	.update			= sha512_arm_update,
69	.final			= sha512_arm_final,
70	.finup			= sha512_arm_finup,
71	.descsize		= sizeof(struct sha512_state),
72	.digestsize		= SHA512_DIGEST_SIZE,
73	.base			= {
74		.cra_name		= "sha512",
75		.cra_driver_name	= "sha512-arm",
76		.cra_priority		= 250,
77		.cra_blocksize		= SHA512_BLOCK_SIZE,
78		.cra_module		= THIS_MODULE,
79	}
80} };
81
82static int __init sha512_arm_mod_init(void)
83{
84	int err;
85
86	err = crypto_register_shashes(sha512_arm_algs,
87				      ARRAY_SIZE(sha512_arm_algs));
88	if (err)
89		return err;
90
91	if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon()) {
92		err = crypto_register_shashes(sha512_neon_algs,
93					      ARRAY_SIZE(sha512_neon_algs));
94		if (err)
95			goto err_unregister;
96	}
97	return 0;
98
99err_unregister:
100	crypto_unregister_shashes(sha512_arm_algs,
101				  ARRAY_SIZE(sha512_arm_algs));
102
103	return err;
104}
105
106static void __exit sha512_arm_mod_fini(void)
107{
108	crypto_unregister_shashes(sha512_arm_algs,
109				  ARRAY_SIZE(sha512_arm_algs));
110	if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon())
111		crypto_unregister_shashes(sha512_neon_algs,
112					  ARRAY_SIZE(sha512_neon_algs));
113}
114
115module_init(sha512_arm_mod_init);
116module_exit(sha512_arm_mod_fini);
117