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/sha2.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(struct sha512_state *state,
29					u8 const *src, int blocks);
30
31int sha512_arm_update(struct shash_desc *desc, const u8 *data,
32		      unsigned int len)
33{
34	return sha512_base_do_update(desc, data, len, sha512_block_data_order);
35}
36
37static int sha512_arm_final(struct shash_desc *desc, u8 *out)
38{
39	sha512_base_do_finalize(desc, sha512_block_data_order);
40	return sha512_base_finish(desc, out);
41}
42
43int sha512_arm_finup(struct shash_desc *desc, const u8 *data,
44		     unsigned int len, u8 *out)
45{
46	sha512_base_do_update(desc, data, len, sha512_block_data_order);
47	return sha512_arm_final(desc, out);
48}
49
50static struct shash_alg sha512_arm_algs[] = { {
51	.init			= sha384_base_init,
52	.update			= sha512_arm_update,
53	.final			= sha512_arm_final,
54	.finup			= sha512_arm_finup,
55	.descsize		= sizeof(struct sha512_state),
56	.digestsize		= SHA384_DIGEST_SIZE,
57	.base			= {
58		.cra_name		= "sha384",
59		.cra_driver_name	= "sha384-arm",
60		.cra_priority		= 250,
61		.cra_blocksize		= SHA512_BLOCK_SIZE,
62		.cra_module		= THIS_MODULE,
63	}
64},  {
65	.init			= sha512_base_init,
66	.update			= sha512_arm_update,
67	.final			= sha512_arm_final,
68	.finup			= sha512_arm_finup,
69	.descsize		= sizeof(struct sha512_state),
70	.digestsize		= SHA512_DIGEST_SIZE,
71	.base			= {
72		.cra_name		= "sha512",
73		.cra_driver_name	= "sha512-arm",
74		.cra_priority		= 250,
75		.cra_blocksize		= SHA512_BLOCK_SIZE,
76		.cra_module		= THIS_MODULE,
77	}
78} };
79
80static int __init sha512_arm_mod_init(void)
81{
82	int err;
83
84	err = crypto_register_shashes(sha512_arm_algs,
85				      ARRAY_SIZE(sha512_arm_algs));
86	if (err)
87		return err;
88
89	if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon()) {
90		err = crypto_register_shashes(sha512_neon_algs,
91					      ARRAY_SIZE(sha512_neon_algs));
92		if (err)
93			goto err_unregister;
94	}
95	return 0;
96
97err_unregister:
98	crypto_unregister_shashes(sha512_arm_algs,
99				  ARRAY_SIZE(sha512_arm_algs));
100
101	return err;
102}
103
104static void __exit sha512_arm_mod_fini(void)
105{
106	crypto_unregister_shashes(sha512_arm_algs,
107				  ARRAY_SIZE(sha512_arm_algs));
108	if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon())
109		crypto_unregister_shashes(sha512_neon_algs,
110					  ARRAY_SIZE(sha512_neon_algs));
111}
112
113module_init(sha512_arm_mod_init);
114module_exit(sha512_arm_mod_fini);
115