| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Glue code for the SHA1 Secure Hash Algorithm assembler implementation using |
| * ARM NEON instructions. |
| * |
| * Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi> |
| * |
| * This file is based on sha1_generic.c and sha1_ssse3_glue.c: |
| * Copyright (c) Alan Smithee. |
| * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> |
| * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> |
| * Copyright (c) Mathias Krause <minipli@googlemail.com> |
| * Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com> |
| */ |
| |
| #include <crypto/internal/hash.h> |
| #include <crypto/internal/simd.h> |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/mm.h> |
| #include <linux/types.h> |
| #include <crypto/sha.h> |
| #include <crypto/sha1_base.h> |
| #include <asm/neon.h> |
| #include <asm/simd.h> |
| |
| #include "sha1.h" |
| |
| asmlinkage void sha1_transform_neon(void *state_h, const char *data, |
| unsigned int rounds); |
| |
| static int sha1_neon_update(struct shash_desc *desc, const u8 *data, |
| unsigned int len) |
| { |
| struct sha1_state *sctx = shash_desc_ctx(desc); |
| |
| if (!crypto_simd_usable() || |
| (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE) |
| return sha1_update_arm(desc, data, len); |
| |
| kernel_neon_begin(); |
| sha1_base_do_update(desc, data, len, |
| (sha1_block_fn *)sha1_transform_neon); |
| kernel_neon_end(); |
| |
| return 0; |
| } |
| |
| static int sha1_neon_finup(struct shash_desc *desc, const u8 *data, |
| unsigned int len, u8 *out) |
| { |
| if (!crypto_simd_usable()) |
| return sha1_finup_arm(desc, data, len, out); |
| |
| kernel_neon_begin(); |
| if (len) |
| sha1_base_do_update(desc, data, len, |
| (sha1_block_fn *)sha1_transform_neon); |
| sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_transform_neon); |
| kernel_neon_end(); |
| |
| return sha1_base_finish(desc, out); |
| } |
| |
| static int sha1_neon_final(struct shash_desc *desc, u8 *out) |
| { |
| return sha1_neon_finup(desc, NULL, 0, out); |
| } |
| |
| static struct shash_alg alg = { |
| .digestsize = SHA1_DIGEST_SIZE, |
| .init = sha1_base_init, |
| .update = sha1_neon_update, |
| .final = sha1_neon_final, |
| .finup = sha1_neon_finup, |
| .descsize = sizeof(struct sha1_state), |
| .base = { |
| .cra_name = "sha1", |
| .cra_driver_name = "sha1-neon", |
| .cra_priority = 250, |
| .cra_blocksize = SHA1_BLOCK_SIZE, |
| .cra_module = THIS_MODULE, |
| } |
| }; |
| |
| static int __init sha1_neon_mod_init(void) |
| { |
| if (!cpu_has_neon()) |
| return -ENODEV; |
| |
| return crypto_register_shash(&alg); |
| } |
| |
| static void __exit sha1_neon_mod_fini(void) |
| { |
| crypto_unregister_shash(&alg); |
| } |
| |
| module_init(sha1_neon_mod_init); |
| module_exit(sha1_neon_mod_fini); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, NEON accelerated"); |
| MODULE_ALIAS_CRYPTO("sha1"); |