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