2 * Glue code for the SHA1 Secure Hash Algorithm assembler implementation using
3 * ARM NEON instructions.
5 * Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>
7 * This file is based on sha1_generic.c and sha1_ssse3_glue.c:
8 * Copyright (c) Alan Smithee.
9 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
10 * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
11 * Copyright (c) Mathias Krause <minipli@googlemail.com>
12 * Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com>
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the Free
16 * Software Foundation; either version 2 of the License, or (at your option)
21 #include <crypto/internal/hash.h>
22 #include <crypto/internal/simd.h>
23 #include <linux/init.h>
24 #include <linux/module.h>
26 #include <linux/cryptohash.h>
27 #include <linux/types.h>
28 #include <crypto/sha.h>
29 #include <crypto/sha1_base.h>
35 asmlinkage void sha1_transform_neon(void *state_h, const char *data,
38 static int sha1_neon_update(struct shash_desc *desc, const u8 *data,
41 struct sha1_state *sctx = shash_desc_ctx(desc);
43 if (!crypto_simd_usable() ||
44 (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE)
45 return sha1_update_arm(desc, data, len);
48 sha1_base_do_update(desc, data, len,
49 (sha1_block_fn *)sha1_transform_neon);
55 static int sha1_neon_finup(struct shash_desc *desc, const u8 *data,
56 unsigned int len, u8 *out)
58 if (!crypto_simd_usable())
59 return sha1_finup_arm(desc, data, len, out);
63 sha1_base_do_update(desc, data, len,
64 (sha1_block_fn *)sha1_transform_neon);
65 sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_transform_neon);
68 return sha1_base_finish(desc, out);
71 static int sha1_neon_final(struct shash_desc *desc, u8 *out)
73 return sha1_neon_finup(desc, NULL, 0, out);
76 static struct shash_alg alg = {
77 .digestsize = SHA1_DIGEST_SIZE,
78 .init = sha1_base_init,
79 .update = sha1_neon_update,
80 .final = sha1_neon_final,
81 .finup = sha1_neon_finup,
82 .descsize = sizeof(struct sha1_state),
85 .cra_driver_name = "sha1-neon",
87 .cra_blocksize = SHA1_BLOCK_SIZE,
88 .cra_module = THIS_MODULE,
92 static int __init sha1_neon_mod_init(void)
97 return crypto_register_shash(&alg);
100 static void __exit sha1_neon_mod_fini(void)
102 crypto_unregister_shash(&alg);
105 module_init(sha1_neon_mod_init);
106 module_exit(sha1_neon_mod_fini);
108 MODULE_LICENSE("GPL");
109 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, NEON accelerated");
110 MODULE_ALIAS_CRYPTO("sha1");