1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2864cbeedSArd Biesheuvel /*
3864cbeedSArd Biesheuvel * sha1-ce-glue.c - SHA-1 secure hash using ARMv8 Crypto Extensions
4864cbeedSArd Biesheuvel *
5864cbeedSArd Biesheuvel * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
6864cbeedSArd Biesheuvel */
7864cbeedSArd Biesheuvel
8864cbeedSArd Biesheuvel #include <crypto/internal/hash.h>
999680c5eSEric Biggers #include <crypto/internal/simd.h>
10*a24d22b2SEric Biggers #include <crypto/sha1.h>
11dde00981SArd Biesheuvel #include <crypto/sha1_base.h>
12bd56f95eSArd Biesheuvel #include <linux/cpufeature.h>
13864cbeedSArd Biesheuvel #include <linux/crypto.h>
14864cbeedSArd Biesheuvel #include <linux/module.h>
15864cbeedSArd Biesheuvel
16864cbeedSArd Biesheuvel #include <asm/hwcap.h>
17864cbeedSArd Biesheuvel #include <asm/neon.h>
18864cbeedSArd Biesheuvel #include <asm/simd.h>
19864cbeedSArd Biesheuvel
2090451d6bSArd Biesheuvel #include "sha1.h"
2190451d6bSArd Biesheuvel
22864cbeedSArd Biesheuvel MODULE_DESCRIPTION("SHA1 secure hash using ARMv8 Crypto Extensions");
23864cbeedSArd Biesheuvel MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
24864cbeedSArd Biesheuvel MODULE_LICENSE("GPL v2");
25864cbeedSArd Biesheuvel
26dde00981SArd Biesheuvel asmlinkage void sha1_ce_transform(struct sha1_state *sst, u8 const *src,
27dde00981SArd Biesheuvel int blocks);
28864cbeedSArd Biesheuvel
sha1_ce_update(struct shash_desc * desc,const u8 * data,unsigned int len)29dde00981SArd Biesheuvel static int sha1_ce_update(struct shash_desc *desc, const u8 *data,
30864cbeedSArd Biesheuvel unsigned int len)
31864cbeedSArd Biesheuvel {
32864cbeedSArd Biesheuvel struct sha1_state *sctx = shash_desc_ctx(desc);
33864cbeedSArd Biesheuvel
3499680c5eSEric Biggers if (!crypto_simd_usable() ||
35dde00981SArd Biesheuvel (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE)
36864cbeedSArd Biesheuvel return sha1_update_arm(desc, data, len);
37864cbeedSArd Biesheuvel
38864cbeedSArd Biesheuvel kernel_neon_begin();
39dde00981SArd Biesheuvel sha1_base_do_update(desc, data, len, sha1_ce_transform);
40864cbeedSArd Biesheuvel kernel_neon_end();
41864cbeedSArd Biesheuvel
42dde00981SArd Biesheuvel return 0;
43864cbeedSArd Biesheuvel }
44dde00981SArd Biesheuvel
sha1_ce_finup(struct shash_desc * desc,const u8 * data,unsigned int len,u8 * out)45dde00981SArd Biesheuvel static int sha1_ce_finup(struct shash_desc *desc, const u8 *data,
46dde00981SArd Biesheuvel unsigned int len, u8 *out)
47dde00981SArd Biesheuvel {
4899680c5eSEric Biggers if (!crypto_simd_usable())
49dde00981SArd Biesheuvel return sha1_finup_arm(desc, data, len, out);
50dde00981SArd Biesheuvel
51dde00981SArd Biesheuvel kernel_neon_begin();
52864cbeedSArd Biesheuvel if (len)
53dde00981SArd Biesheuvel sha1_base_do_update(desc, data, len, sha1_ce_transform);
54dde00981SArd Biesheuvel sha1_base_do_finalize(desc, sha1_ce_transform);
55dde00981SArd Biesheuvel kernel_neon_end();
56dde00981SArd Biesheuvel
57dde00981SArd Biesheuvel return sha1_base_finish(desc, out);
58864cbeedSArd Biesheuvel }
59864cbeedSArd Biesheuvel
sha1_ce_final(struct shash_desc * desc,u8 * out)60dde00981SArd Biesheuvel static int sha1_ce_final(struct shash_desc *desc, u8 *out)
61864cbeedSArd Biesheuvel {
62dde00981SArd Biesheuvel return sha1_ce_finup(desc, NULL, 0, out);
63864cbeedSArd Biesheuvel }
64864cbeedSArd Biesheuvel
65864cbeedSArd Biesheuvel static struct shash_alg alg = {
66dde00981SArd Biesheuvel .init = sha1_base_init,
67dde00981SArd Biesheuvel .update = sha1_ce_update,
68dde00981SArd Biesheuvel .final = sha1_ce_final,
69dde00981SArd Biesheuvel .finup = sha1_ce_finup,
70864cbeedSArd Biesheuvel .descsize = sizeof(struct sha1_state),
71864cbeedSArd Biesheuvel .digestsize = SHA1_DIGEST_SIZE,
72864cbeedSArd Biesheuvel .base = {
73864cbeedSArd Biesheuvel .cra_name = "sha1",
74864cbeedSArd Biesheuvel .cra_driver_name = "sha1-ce",
75864cbeedSArd Biesheuvel .cra_priority = 200,
76864cbeedSArd Biesheuvel .cra_blocksize = SHA1_BLOCK_SIZE,
77864cbeedSArd Biesheuvel .cra_module = THIS_MODULE,
78864cbeedSArd Biesheuvel }
79864cbeedSArd Biesheuvel };
80864cbeedSArd Biesheuvel
sha1_ce_mod_init(void)81864cbeedSArd Biesheuvel static int __init sha1_ce_mod_init(void)
82864cbeedSArd Biesheuvel {
83864cbeedSArd Biesheuvel return crypto_register_shash(&alg);
84864cbeedSArd Biesheuvel }
85864cbeedSArd Biesheuvel
sha1_ce_mod_fini(void)86864cbeedSArd Biesheuvel static void __exit sha1_ce_mod_fini(void)
87864cbeedSArd Biesheuvel {
88864cbeedSArd Biesheuvel crypto_unregister_shash(&alg);
89864cbeedSArd Biesheuvel }
90864cbeedSArd Biesheuvel
91bd56f95eSArd Biesheuvel module_cpu_feature_match(SHA1, sha1_ce_mod_init);
92864cbeedSArd Biesheuvel module_exit(sha1_ce_mod_fini);
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