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120 lines
3.1 KiB
120 lines
3.1 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Glue code for the SHA256 Secure Hash Algorithm assembly implementation |
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* using optimized ARM assembler and NEON instructions. |
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* |
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* Copyright © 2015 Google Inc. |
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* |
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* This file is based on sha256_ssse3_glue.c: |
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* Copyright (C) 2013 Intel Corporation |
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* Author: Tim Chen <[email protected]> |
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*/ |
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#include <crypto/internal/hash.h> |
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#include <linux/crypto.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 <linux/string.h> |
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#include <crypto/sha2.h> |
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#include <crypto/sha256_base.h> |
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#include <asm/simd.h> |
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#include <asm/neon.h> |
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#include "sha256_glue.h" |
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asmlinkage void sha256_block_data_order(u32 *digest, const void *data, |
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unsigned int num_blks); |
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int crypto_sha256_arm_update(struct shash_desc *desc, const u8 *data, |
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unsigned int len) |
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{ |
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/* make sure casting to sha256_block_fn() is safe */ |
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BUILD_BUG_ON(offsetof(struct sha256_state, state) != 0); |
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return sha256_base_do_update(desc, data, len, |
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(sha256_block_fn *)sha256_block_data_order); |
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} |
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EXPORT_SYMBOL(crypto_sha256_arm_update); |
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static int crypto_sha256_arm_final(struct shash_desc *desc, u8 *out) |
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{ |
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sha256_base_do_finalize(desc, |
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(sha256_block_fn *)sha256_block_data_order); |
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return sha256_base_finish(desc, out); |
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} |
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int crypto_sha256_arm_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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sha256_base_do_update(desc, data, len, |
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(sha256_block_fn *)sha256_block_data_order); |
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return crypto_sha256_arm_final(desc, out); |
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} |
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EXPORT_SYMBOL(crypto_sha256_arm_finup); |
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static struct shash_alg algs[] = { { |
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.digestsize = SHA256_DIGEST_SIZE, |
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.init = sha256_base_init, |
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.update = crypto_sha256_arm_update, |
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.final = crypto_sha256_arm_final, |
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.finup = crypto_sha256_arm_finup, |
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.descsize = sizeof(struct sha256_state), |
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.base = { |
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.cra_name = "sha256", |
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.cra_driver_name = "sha256-asm", |
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.cra_priority = 150, |
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.cra_blocksize = SHA256_BLOCK_SIZE, |
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.cra_module = THIS_MODULE, |
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} |
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}, { |
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.digestsize = SHA224_DIGEST_SIZE, |
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.init = sha224_base_init, |
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.update = crypto_sha256_arm_update, |
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.final = crypto_sha256_arm_final, |
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.finup = crypto_sha256_arm_finup, |
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.descsize = sizeof(struct sha256_state), |
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.base = { |
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.cra_name = "sha224", |
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.cra_driver_name = "sha224-asm", |
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.cra_priority = 150, |
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.cra_blocksize = SHA224_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 sha256_mod_init(void) |
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{ |
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int res = crypto_register_shashes(algs, ARRAY_SIZE(algs)); |
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if (res < 0) |
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return res; |
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if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon()) { |
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res = crypto_register_shashes(sha256_neon_algs, |
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ARRAY_SIZE(sha256_neon_algs)); |
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if (res < 0) |
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crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); |
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} |
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return res; |
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} |
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static void __exit sha256_mod_fini(void) |
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{ |
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crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); |
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if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon()) |
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crypto_unregister_shashes(sha256_neon_algs, |
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ARRAY_SIZE(sha256_neon_algs)); |
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} |
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module_init(sha256_mod_init); |
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module_exit(sha256_mod_fini); |
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MODULE_LICENSE("GPL"); |
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MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm (ARM), including NEON"); |
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MODULE_ALIAS_CRYPTO("sha256");
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