| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * sha512-ce-glue.c - SHA-384/SHA-512 using ARMv8 Crypto Extensions |
| * |
| * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <asm/neon.h> |
| #include <asm/simd.h> |
| #include <asm/unaligned.h> |
| #include <crypto/internal/hash.h> |
| #include <crypto/internal/simd.h> |
| #include <crypto/sha2.h> |
| #include <crypto/sha512_base.h> |
| #include <linux/cpufeature.h> |
| #include <linux/crypto.h> |
| #include <linux/module.h> |
| |
| MODULE_DESCRIPTION("SHA-384/SHA-512 secure hash using ARMv8 Crypto Extensions"); |
| MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); |
| MODULE_LICENSE("GPL v2"); |
| |
| asmlinkage void sha512_ce_transform(struct sha512_state *sst, u8 const *src, |
| int blocks); |
| |
| asmlinkage void sha512_block_data_order(u64 *digest, u8 const *src, int blocks); |
| |
| static void __sha512_block_data_order(struct sha512_state *sst, u8 const *src, |
| int blocks) |
| { |
| sha512_block_data_order(sst->state, src, blocks); |
| } |
| |
| static int sha512_ce_update(struct shash_desc *desc, const u8 *data, |
| unsigned int len) |
| { |
| if (!crypto_simd_usable()) |
| return sha512_base_do_update(desc, data, len, |
| __sha512_block_data_order); |
| |
| kernel_neon_begin(); |
| sha512_base_do_update(desc, data, len, sha512_ce_transform); |
| kernel_neon_end(); |
| |
| return 0; |
| } |
| |
| static int sha512_ce_finup(struct shash_desc *desc, const u8 *data, |
| unsigned int len, u8 *out) |
| { |
| if (!crypto_simd_usable()) { |
| if (len) |
| sha512_base_do_update(desc, data, len, |
| __sha512_block_data_order); |
| sha512_base_do_finalize(desc, __sha512_block_data_order); |
| return sha512_base_finish(desc, out); |
| } |
| |
| kernel_neon_begin(); |
| sha512_base_do_update(desc, data, len, sha512_ce_transform); |
| sha512_base_do_finalize(desc, sha512_ce_transform); |
| kernel_neon_end(); |
| return sha512_base_finish(desc, out); |
| } |
| |
| static int sha512_ce_final(struct shash_desc *desc, u8 *out) |
| { |
| if (!crypto_simd_usable()) { |
| sha512_base_do_finalize(desc, __sha512_block_data_order); |
| return sha512_base_finish(desc, out); |
| } |
| |
| kernel_neon_begin(); |
| sha512_base_do_finalize(desc, sha512_ce_transform); |
| kernel_neon_end(); |
| return sha512_base_finish(desc, out); |
| } |
| |
| static struct shash_alg algs[] = { { |
| .init = sha384_base_init, |
| .update = sha512_ce_update, |
| .final = sha512_ce_final, |
| .finup = sha512_ce_finup, |
| .descsize = sizeof(struct sha512_state), |
| .digestsize = SHA384_DIGEST_SIZE, |
| .base.cra_name = "sha384", |
| .base.cra_driver_name = "sha384-ce", |
| .base.cra_priority = 200, |
| .base.cra_blocksize = SHA512_BLOCK_SIZE, |
| .base.cra_module = THIS_MODULE, |
| }, { |
| .init = sha512_base_init, |
| .update = sha512_ce_update, |
| .final = sha512_ce_final, |
| .finup = sha512_ce_finup, |
| .descsize = sizeof(struct sha512_state), |
| .digestsize = SHA512_DIGEST_SIZE, |
| .base.cra_name = "sha512", |
| .base.cra_driver_name = "sha512-ce", |
| .base.cra_priority = 200, |
| .base.cra_blocksize = SHA512_BLOCK_SIZE, |
| .base.cra_module = THIS_MODULE, |
| } }; |
| |
| static int __init sha512_ce_mod_init(void) |
| { |
| return crypto_register_shashes(algs, ARRAY_SIZE(algs)); |
| } |
| |
| static void __exit sha512_ce_mod_fini(void) |
| { |
| crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); |
| } |
| |
| module_cpu_feature_match(SHA512, sha512_ce_mod_init); |
| module_exit(sha512_ce_mod_fini); |