// 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");