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Currently <crypto/sha.h> contains declarations for both SHA-1 and SHA-2, and <crypto/sha3.h> contains declarations for SHA-3. This organization is inconsistent, but more importantly SHA-1 is no longer considered to be cryptographically secure. So to the extent possible, SHA-1 shouldn't be grouped together with any of the other SHA versions, and usage of it should be phased out. Therefore, split <crypto/sha.h> into two headers <crypto/sha1.h> and <crypto/sha2.h>, and make everyone explicitly specify whether they want the declarations for SHA-1, SHA-2, or both. This avoids making the SHA-1 declarations visible to files that don't want anything to do with SHA-1. It also prepares for potentially moving sha1.h into a new insecure/ or dangerous/ directory. Signed-off-by: Eric Biggers <ebiggers@google.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
// 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 <tim.c.chen@linux.intel.com>
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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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