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121 lines
3.3 KiB
121 lines
3.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* sha512-ce-glue.c - SHA-384/SHA-512 using ARMv8 Crypto Extensions |
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* |
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* Copyright (C) 2018 Linaro Ltd <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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*/ |
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#include <asm/neon.h> |
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#include <asm/simd.h> |
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#include <asm/unaligned.h> |
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#include <crypto/internal/hash.h> |
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#include <crypto/internal/simd.h> |
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#include <crypto/sha2.h> |
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#include <crypto/sha512_base.h> |
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#include <linux/cpufeature.h> |
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#include <linux/crypto.h> |
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#include <linux/module.h> |
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MODULE_DESCRIPTION("SHA-384/SHA-512 secure hash using ARMv8 Crypto Extensions"); |
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MODULE_AUTHOR("Ard Biesheuvel <[email protected]>"); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_ALIAS_CRYPTO("sha384"); |
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MODULE_ALIAS_CRYPTO("sha512"); |
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asmlinkage int sha512_ce_transform(struct sha512_state *sst, u8 const *src, |
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int blocks); |
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asmlinkage void sha512_block_data_order(u64 *digest, u8 const *src, int blocks); |
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static void __sha512_ce_transform(struct sha512_state *sst, u8 const *src, |
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int blocks) |
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{ |
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while (blocks) { |
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int rem; |
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kernel_neon_begin(); |
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rem = sha512_ce_transform(sst, src, blocks); |
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kernel_neon_end(); |
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src += (blocks - rem) * SHA512_BLOCK_SIZE; |
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blocks = rem; |
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} |
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} |
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static void __sha512_block_data_order(struct sha512_state *sst, u8 const *src, |
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int blocks) |
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{ |
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sha512_block_data_order(sst->state, src, blocks); |
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} |
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static int sha512_ce_update(struct shash_desc *desc, const u8 *data, |
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unsigned int len) |
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{ |
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sha512_block_fn *fn = crypto_simd_usable() ? __sha512_ce_transform |
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: __sha512_block_data_order; |
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sha512_base_do_update(desc, data, len, fn); |
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return 0; |
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} |
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static int sha512_ce_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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sha512_block_fn *fn = crypto_simd_usable() ? __sha512_ce_transform |
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: __sha512_block_data_order; |
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sha512_base_do_update(desc, data, len, fn); |
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sha512_base_do_finalize(desc, fn); |
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return sha512_base_finish(desc, out); |
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} |
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static int sha512_ce_final(struct shash_desc *desc, u8 *out) |
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{ |
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sha512_block_fn *fn = crypto_simd_usable() ? __sha512_ce_transform |
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: __sha512_block_data_order; |
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sha512_base_do_finalize(desc, fn); |
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return sha512_base_finish(desc, out); |
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} |
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static struct shash_alg algs[] = { { |
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.init = sha384_base_init, |
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.update = sha512_ce_update, |
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.final = sha512_ce_final, |
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.finup = sha512_ce_finup, |
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.descsize = sizeof(struct sha512_state), |
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.digestsize = SHA384_DIGEST_SIZE, |
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.base.cra_name = "sha384", |
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.base.cra_driver_name = "sha384-ce", |
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.base.cra_priority = 200, |
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.base.cra_blocksize = SHA512_BLOCK_SIZE, |
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.base.cra_module = THIS_MODULE, |
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}, { |
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.init = sha512_base_init, |
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.update = sha512_ce_update, |
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.final = sha512_ce_final, |
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.finup = sha512_ce_finup, |
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.descsize = sizeof(struct sha512_state), |
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.digestsize = SHA512_DIGEST_SIZE, |
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.base.cra_name = "sha512", |
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.base.cra_driver_name = "sha512-ce", |
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.base.cra_priority = 200, |
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.base.cra_blocksize = SHA512_BLOCK_SIZE, |
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.base.cra_module = THIS_MODULE, |
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} }; |
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static int __init sha512_ce_mod_init(void) |
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{ |
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return crypto_register_shashes(algs, ARRAY_SIZE(algs)); |
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} |
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static void __exit sha512_ce_mod_fini(void) |
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{ |
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crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); |
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} |
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module_cpu_feature_match(SHA512, sha512_ce_mod_init); |
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module_exit(sha512_ce_mod_fini);
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