1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Glue code for the SHA1 Secure Hash Algorithm assembler implementation using
4 * ARM NEON instructions.
6 * Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>
8 * This file is based on sha1_generic.c and sha1_ssse3_glue.c:
9 * Copyright (c) Alan Smithee.
10 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
11 * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
12 * Copyright (c) Mathias Krause <minipli@googlemail.com>
13 * Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com>
16 #include <crypto/internal/hash.h>
17 #include <crypto/internal/simd.h>
18 #include <linux/init.h>
19 #include <linux/module.h>
21 #include <linux/cryptohash.h>
22 #include <linux/types.h>
23 #include <crypto/sha.h>
24 #include <crypto/sha1_base.h>
30 asmlinkage void sha1_transform_neon(void *state_h, const char *data,
33 static int sha1_neon_update(struct shash_desc *desc, const u8 *data,
36 struct sha1_state *sctx = shash_desc_ctx(desc);
38 if (!crypto_simd_usable() ||
39 (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE)
40 return sha1_update_arm(desc, data, len);
43 sha1_base_do_update(desc, data, len,
44 (sha1_block_fn *)sha1_transform_neon);
50 static int sha1_neon_finup(struct shash_desc *desc, const u8 *data,
51 unsigned int len, u8 *out)
53 if (!crypto_simd_usable())
54 return sha1_finup_arm(desc, data, len, out);
58 sha1_base_do_update(desc, data, len,
59 (sha1_block_fn *)sha1_transform_neon);
60 sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_transform_neon);
63 return sha1_base_finish(desc, out);
66 static int sha1_neon_final(struct shash_desc *desc, u8 *out)
68 return sha1_neon_finup(desc, NULL, 0, out);
71 static struct shash_alg alg = {
72 .digestsize = SHA1_DIGEST_SIZE,
73 .init = sha1_base_init,
74 .update = sha1_neon_update,
75 .final = sha1_neon_final,
76 .finup = sha1_neon_finup,
77 .descsize = sizeof(struct sha1_state),
80 .cra_driver_name = "sha1-neon",
82 .cra_blocksize = SHA1_BLOCK_SIZE,
83 .cra_module = THIS_MODULE,
87 static int __init sha1_neon_mod_init(void)
92 return crypto_register_shash(&alg);
95 static void __exit sha1_neon_mod_fini(void)
97 crypto_unregister_shash(&alg);
100 module_init(sha1_neon_mod_init);
101 module_exit(sha1_neon_mod_fini);
103 MODULE_LICENSE("GPL");
104 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, NEON accelerated");
105 MODULE_ALIAS_CRYPTO("sha1");