| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 2 | /* |
| 3 | * Glue code for the SHA256 Secure Hash Algorithm assembly implementation |
| 4 | * using NEON instructions. |
| 5 | * |
| 6 | * Copyright © 2015 Google Inc. |
| 7 | * |
| 8 | * This file is based on sha512_neon_glue.c: |
| 9 | * Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi> |
| 10 | */ |
| 11 | |
| 12 | #include <crypto/internal/hash.h> |
| 13 | #include <crypto/internal/simd.h> |
| 14 | #include <linux/cryptohash.h> |
| 15 | #include <linux/types.h> |
| 16 | #include <linux/string.h> |
| 17 | #include <crypto/sha.h> |
| 18 | #include <crypto/sha256_base.h> |
| 19 | #include <asm/byteorder.h> |
| 20 | #include <asm/simd.h> |
| 21 | #include <asm/neon.h> |
| 22 | |
| 23 | #include "sha256_glue.h" |
| 24 | |
| 25 | asmlinkage void sha256_block_data_order_neon(u32 *digest, const void *data, |
| 26 | unsigned int num_blks); |
| 27 | |
| 28 | static int crypto_sha256_neon_update(struct shash_desc *desc, const u8 *data, |
| 29 | unsigned int len) |
| 30 | { |
| 31 | struct sha256_state *sctx = shash_desc_ctx(desc); |
| 32 | |
| 33 | if (!crypto_simd_usable() || |
| 34 | (sctx->count % SHA256_BLOCK_SIZE) + len < SHA256_BLOCK_SIZE) |
| 35 | return crypto_sha256_arm_update(desc, data, len); |
| 36 | |
| 37 | kernel_neon_begin(); |
| 38 | sha256_base_do_update(desc, data, len, |
| 39 | (sha256_block_fn *)sha256_block_data_order_neon); |
| 40 | kernel_neon_end(); |
| 41 | |
| 42 | return 0; |
| 43 | } |
| 44 | |
| 45 | static int crypto_sha256_neon_finup(struct shash_desc *desc, const u8 *data, |
| 46 | unsigned int len, u8 *out) |
| 47 | { |
| 48 | if (!crypto_simd_usable()) |
| 49 | return crypto_sha256_arm_finup(desc, data, len, out); |
| 50 | |
| 51 | kernel_neon_begin(); |
| 52 | if (len) |
| 53 | sha256_base_do_update(desc, data, len, |
| 54 | (sha256_block_fn *)sha256_block_data_order_neon); |
| 55 | sha256_base_do_finalize(desc, |
| 56 | (sha256_block_fn *)sha256_block_data_order_neon); |
| 57 | kernel_neon_end(); |
| 58 | |
| 59 | return sha256_base_finish(desc, out); |
| 60 | } |
| 61 | |
| 62 | static int crypto_sha256_neon_final(struct shash_desc *desc, u8 *out) |
| 63 | { |
| 64 | return crypto_sha256_neon_finup(desc, NULL, 0, out); |
| 65 | } |
| 66 | |
| 67 | struct shash_alg sha256_neon_algs[] = { { |
| 68 | .digestsize = SHA256_DIGEST_SIZE, |
| 69 | .init = sha256_base_init, |
| 70 | .update = crypto_sha256_neon_update, |
| 71 | .final = crypto_sha256_neon_final, |
| 72 | .finup = crypto_sha256_neon_finup, |
| 73 | .descsize = sizeof(struct sha256_state), |
| 74 | .base = { |
| 75 | .cra_name = "sha256", |
| 76 | .cra_driver_name = "sha256-neon", |
| 77 | .cra_priority = 250, |
| 78 | .cra_blocksize = SHA256_BLOCK_SIZE, |
| 79 | .cra_module = THIS_MODULE, |
| 80 | } |
| 81 | }, { |
| 82 | .digestsize = SHA224_DIGEST_SIZE, |
| 83 | .init = sha224_base_init, |
| 84 | .update = crypto_sha256_neon_update, |
| 85 | .final = crypto_sha256_neon_final, |
| 86 | .finup = crypto_sha256_neon_finup, |
| 87 | .descsize = sizeof(struct sha256_state), |
| 88 | .base = { |
| 89 | .cra_name = "sha224", |
| 90 | .cra_driver_name = "sha224-neon", |
| 91 | .cra_priority = 250, |
| 92 | .cra_blocksize = SHA224_BLOCK_SIZE, |
| 93 | .cra_module = THIS_MODULE, |
| 94 | } |
| 95 | } }; |