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420 lines
10 KiB
420 lines
10 KiB
/* |
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* Cryptographic API. |
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* |
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* Glue code for the SHA256 Secure Hash Algorithm assembler |
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* implementation using supplemental SSE3 / AVX / AVX2 instructions. |
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* |
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* This file is based on sha256_generic.c |
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* |
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* Copyright (C) 2013 Intel Corporation. |
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* |
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* Author: |
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* Tim Chen <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by the Free |
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* Software Foundation; either version 2 of the License, or (at your option) |
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* any later version. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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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/sha2.h> |
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#include <crypto/sha256_base.h> |
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#include <linux/string.h> |
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#include <asm/simd.h> |
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asmlinkage void sha256_transform_ssse3(struct sha256_state *state, |
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const u8 *data, int blocks); |
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static int _sha256_update(struct shash_desc *desc, const u8 *data, |
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unsigned int len, sha256_block_fn *sha256_xform) |
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{ |
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struct sha256_state *sctx = shash_desc_ctx(desc); |
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if (!crypto_simd_usable() || |
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(sctx->count % SHA256_BLOCK_SIZE) + len < SHA256_BLOCK_SIZE) |
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return crypto_sha256_update(desc, data, len); |
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/* |
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* Make sure struct sha256_state begins directly with the SHA256 |
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* 256-bit internal state, as this is what the asm functions expect. |
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*/ |
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BUILD_BUG_ON(offsetof(struct sha256_state, state) != 0); |
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kernel_fpu_begin(); |
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sha256_base_do_update(desc, data, len, sha256_xform); |
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kernel_fpu_end(); |
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return 0; |
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} |
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static int sha256_finup(struct shash_desc *desc, const u8 *data, |
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unsigned int len, u8 *out, sha256_block_fn *sha256_xform) |
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{ |
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if (!crypto_simd_usable()) |
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return crypto_sha256_finup(desc, data, len, out); |
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kernel_fpu_begin(); |
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if (len) |
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sha256_base_do_update(desc, data, len, sha256_xform); |
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sha256_base_do_finalize(desc, sha256_xform); |
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kernel_fpu_end(); |
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return sha256_base_finish(desc, out); |
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} |
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static int sha256_ssse3_update(struct shash_desc *desc, const u8 *data, |
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unsigned int len) |
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{ |
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return _sha256_update(desc, data, len, sha256_transform_ssse3); |
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} |
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static int sha256_ssse3_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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return sha256_finup(desc, data, len, out, sha256_transform_ssse3); |
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} |
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/* Add padding and return the message digest. */ |
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static int sha256_ssse3_final(struct shash_desc *desc, u8 *out) |
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{ |
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return sha256_ssse3_finup(desc, NULL, 0, out); |
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} |
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static struct shash_alg sha256_ssse3_algs[] = { { |
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.digestsize = SHA256_DIGEST_SIZE, |
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.init = sha256_base_init, |
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.update = sha256_ssse3_update, |
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.final = sha256_ssse3_final, |
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.finup = sha256_ssse3_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-ssse3", |
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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 = sha256_ssse3_update, |
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.final = sha256_ssse3_final, |
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.finup = sha256_ssse3_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-ssse3", |
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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 register_sha256_ssse3(void) |
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{ |
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if (boot_cpu_has(X86_FEATURE_SSSE3)) |
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return crypto_register_shashes(sha256_ssse3_algs, |
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ARRAY_SIZE(sha256_ssse3_algs)); |
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return 0; |
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} |
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static void unregister_sha256_ssse3(void) |
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{ |
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if (boot_cpu_has(X86_FEATURE_SSSE3)) |
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crypto_unregister_shashes(sha256_ssse3_algs, |
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ARRAY_SIZE(sha256_ssse3_algs)); |
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} |
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asmlinkage void sha256_transform_avx(struct sha256_state *state, |
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const u8 *data, int blocks); |
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static int sha256_avx_update(struct shash_desc *desc, const u8 *data, |
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unsigned int len) |
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{ |
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return _sha256_update(desc, data, len, sha256_transform_avx); |
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} |
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static int sha256_avx_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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return sha256_finup(desc, data, len, out, sha256_transform_avx); |
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} |
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static int sha256_avx_final(struct shash_desc *desc, u8 *out) |
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{ |
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return sha256_avx_finup(desc, NULL, 0, out); |
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} |
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static struct shash_alg sha256_avx_algs[] = { { |
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.digestsize = SHA256_DIGEST_SIZE, |
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.init = sha256_base_init, |
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.update = sha256_avx_update, |
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.final = sha256_avx_final, |
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.finup = sha256_avx_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-avx", |
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.cra_priority = 160, |
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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 = sha256_avx_update, |
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.final = sha256_avx_final, |
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.finup = sha256_avx_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-avx", |
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.cra_priority = 160, |
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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 bool avx_usable(void) |
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{ |
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if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) { |
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if (boot_cpu_has(X86_FEATURE_AVX)) |
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pr_info("AVX detected but unusable.\n"); |
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return false; |
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} |
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return true; |
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} |
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static int register_sha256_avx(void) |
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{ |
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if (avx_usable()) |
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return crypto_register_shashes(sha256_avx_algs, |
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ARRAY_SIZE(sha256_avx_algs)); |
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return 0; |
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} |
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static void unregister_sha256_avx(void) |
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{ |
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if (avx_usable()) |
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crypto_unregister_shashes(sha256_avx_algs, |
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ARRAY_SIZE(sha256_avx_algs)); |
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} |
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asmlinkage void sha256_transform_rorx(struct sha256_state *state, |
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const u8 *data, int blocks); |
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static int sha256_avx2_update(struct shash_desc *desc, const u8 *data, |
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unsigned int len) |
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{ |
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return _sha256_update(desc, data, len, sha256_transform_rorx); |
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} |
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static int sha256_avx2_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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return sha256_finup(desc, data, len, out, sha256_transform_rorx); |
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} |
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static int sha256_avx2_final(struct shash_desc *desc, u8 *out) |
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{ |
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return sha256_avx2_finup(desc, NULL, 0, out); |
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} |
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static struct shash_alg sha256_avx2_algs[] = { { |
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.digestsize = SHA256_DIGEST_SIZE, |
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.init = sha256_base_init, |
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.update = sha256_avx2_update, |
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.final = sha256_avx2_final, |
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.finup = sha256_avx2_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-avx2", |
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.cra_priority = 170, |
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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 = sha256_avx2_update, |
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.final = sha256_avx2_final, |
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.finup = sha256_avx2_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-avx2", |
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.cra_priority = 170, |
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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 bool avx2_usable(void) |
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{ |
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if (avx_usable() && boot_cpu_has(X86_FEATURE_AVX2) && |
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boot_cpu_has(X86_FEATURE_BMI2)) |
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return true; |
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return false; |
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} |
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static int register_sha256_avx2(void) |
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{ |
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if (avx2_usable()) |
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return crypto_register_shashes(sha256_avx2_algs, |
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ARRAY_SIZE(sha256_avx2_algs)); |
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return 0; |
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} |
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static void unregister_sha256_avx2(void) |
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{ |
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if (avx2_usable()) |
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crypto_unregister_shashes(sha256_avx2_algs, |
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ARRAY_SIZE(sha256_avx2_algs)); |
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} |
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#ifdef CONFIG_AS_SHA256_NI |
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asmlinkage void sha256_ni_transform(struct sha256_state *digest, |
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const u8 *data, int rounds); |
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static int sha256_ni_update(struct shash_desc *desc, const u8 *data, |
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unsigned int len) |
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{ |
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return _sha256_update(desc, data, len, sha256_ni_transform); |
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} |
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static int sha256_ni_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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return sha256_finup(desc, data, len, out, sha256_ni_transform); |
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} |
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static int sha256_ni_final(struct shash_desc *desc, u8 *out) |
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{ |
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return sha256_ni_finup(desc, NULL, 0, out); |
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} |
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static struct shash_alg sha256_ni_algs[] = { { |
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.digestsize = SHA256_DIGEST_SIZE, |
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.init = sha256_base_init, |
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.update = sha256_ni_update, |
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.final = sha256_ni_final, |
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.finup = sha256_ni_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-ni", |
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.cra_priority = 250, |
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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 = sha256_ni_update, |
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.final = sha256_ni_final, |
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.finup = sha256_ni_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-ni", |
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.cra_priority = 250, |
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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 register_sha256_ni(void) |
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{ |
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if (boot_cpu_has(X86_FEATURE_SHA_NI)) |
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return crypto_register_shashes(sha256_ni_algs, |
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ARRAY_SIZE(sha256_ni_algs)); |
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return 0; |
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} |
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static void unregister_sha256_ni(void) |
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{ |
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if (boot_cpu_has(X86_FEATURE_SHA_NI)) |
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crypto_unregister_shashes(sha256_ni_algs, |
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ARRAY_SIZE(sha256_ni_algs)); |
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} |
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#else |
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static inline int register_sha256_ni(void) { return 0; } |
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static inline void unregister_sha256_ni(void) { } |
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#endif |
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static int __init sha256_ssse3_mod_init(void) |
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{ |
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if (register_sha256_ssse3()) |
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goto fail; |
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if (register_sha256_avx()) { |
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unregister_sha256_ssse3(); |
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goto fail; |
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} |
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if (register_sha256_avx2()) { |
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unregister_sha256_avx(); |
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unregister_sha256_ssse3(); |
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goto fail; |
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} |
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if (register_sha256_ni()) { |
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unregister_sha256_avx2(); |
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unregister_sha256_avx(); |
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unregister_sha256_ssse3(); |
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goto fail; |
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} |
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return 0; |
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fail: |
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return -ENODEV; |
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} |
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static void __exit sha256_ssse3_mod_fini(void) |
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{ |
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unregister_sha256_ni(); |
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unregister_sha256_avx2(); |
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unregister_sha256_avx(); |
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unregister_sha256_ssse3(); |
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} |
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module_init(sha256_ssse3_mod_init); |
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module_exit(sha256_ssse3_mod_fini); |
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MODULE_LICENSE("GPL"); |
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MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm, Supplemental SSE3 accelerated"); |
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MODULE_ALIAS_CRYPTO("sha256"); |
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MODULE_ALIAS_CRYPTO("sha256-ssse3"); |
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MODULE_ALIAS_CRYPTO("sha256-avx"); |
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MODULE_ALIAS_CRYPTO("sha256-avx2"); |
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MODULE_ALIAS_CRYPTO("sha224"); |
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MODULE_ALIAS_CRYPTO("sha224-ssse3"); |
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MODULE_ALIAS_CRYPTO("sha224-avx"); |
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MODULE_ALIAS_CRYPTO("sha224-avx2"); |
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#ifdef CONFIG_AS_SHA256_NI |
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MODULE_ALIAS_CRYPTO("sha256-ni"); |
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MODULE_ALIAS_CRYPTO("sha224-ni"); |
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#endif
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