1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * BLAKE2s digest algorithm, ARM scalar implementation
 4 *
 5 * Copyright 2020 Google LLC
 6 */
 7
 8#include <crypto/internal/blake2s.h>
 9#include <crypto/internal/hash.h>
10
11#include <linux/module.h>
12
13/* defined in blake2s-core.S */
14EXPORT_SYMBOL(blake2s_compress_arch);
15
16static int crypto_blake2s_update_arm(struct shash_desc *desc,
17				     const u8 *in, unsigned int inlen)
18{
19	return crypto_blake2s_update(desc, in, inlen, blake2s_compress_arch);
20}
21
22static int crypto_blake2s_final_arm(struct shash_desc *desc, u8 *out)
23{
24	return crypto_blake2s_final(desc, out, blake2s_compress_arch);
25}
26
27#define BLAKE2S_ALG(name, driver_name, digest_size)			\
28	{								\
29		.base.cra_name		= name,				\
30		.base.cra_driver_name	= driver_name,			\
31		.base.cra_priority	= 200,				\
32		.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,	\
33		.base.cra_blocksize	= BLAKE2S_BLOCK_SIZE,		\
34		.base.cra_ctxsize	= sizeof(struct blake2s_tfm_ctx), \
35		.base.cra_module	= THIS_MODULE,			\
36		.digestsize		= digest_size,			\
37		.setkey			= crypto_blake2s_setkey,	\
38		.init			= crypto_blake2s_init,		\
39		.update			= crypto_blake2s_update_arm,	\
40		.final			= crypto_blake2s_final_arm,	\
41		.descsize		= sizeof(struct blake2s_state),	\
42	}
43
44static struct shash_alg blake2s_arm_algs[] = {
45	BLAKE2S_ALG("blake2s-128", "blake2s-128-arm", BLAKE2S_128_HASH_SIZE),
46	BLAKE2S_ALG("blake2s-160", "blake2s-160-arm", BLAKE2S_160_HASH_SIZE),
47	BLAKE2S_ALG("blake2s-224", "blake2s-224-arm", BLAKE2S_224_HASH_SIZE),
48	BLAKE2S_ALG("blake2s-256", "blake2s-256-arm", BLAKE2S_256_HASH_SIZE),
49};
50
51static int __init blake2s_arm_mod_init(void)
52{
53	return IS_REACHABLE(CONFIG_CRYPTO_HASH) ?
54		crypto_register_shashes(blake2s_arm_algs,
55					ARRAY_SIZE(blake2s_arm_algs)) : 0;
56}
57
58static void __exit blake2s_arm_mod_exit(void)
59{
60	if (IS_REACHABLE(CONFIG_CRYPTO_HASH))
61		crypto_unregister_shashes(blake2s_arm_algs,
62					  ARRAY_SIZE(blake2s_arm_algs));
63}
64
65module_init(blake2s_arm_mod_init);
66module_exit(blake2s_arm_mod_exit);
67
68MODULE_DESCRIPTION("BLAKE2s digest algorithm, ARM scalar implementation");
69MODULE_LICENSE("GPL");
70MODULE_AUTHOR("Eric Biggers <ebiggers@google.com>");
71MODULE_ALIAS_CRYPTO("blake2s-128");
72MODULE_ALIAS_CRYPTO("blake2s-128-arm");
73MODULE_ALIAS_CRYPTO("blake2s-160");
74MODULE_ALIAS_CRYPTO("blake2s-160-arm");
75MODULE_ALIAS_CRYPTO("blake2s-224");
76MODULE_ALIAS_CRYPTO("blake2s-224-arm");
77MODULE_ALIAS_CRYPTO("blake2s-256");
78MODULE_ALIAS_CRYPTO("blake2s-256-arm");