| Ard Biesheuvel | 140aa50 | 2018-01-19 12:04:39 +0000 | [diff] [blame] | 1 | /* |
| 2 | * sm3-ce-glue.c - SM3 secure hash using ARMv8.2 Crypto Extensions |
| 3 | * |
| 4 | * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #include <asm/neon.h> |
| 12 | #include <asm/simd.h> |
| 13 | #include <asm/unaligned.h> |
| 14 | #include <crypto/internal/hash.h> |
| 15 | #include <crypto/sm3.h> |
| 16 | #include <crypto/sm3_base.h> |
| 17 | #include <linux/cpufeature.h> |
| 18 | #include <linux/crypto.h> |
| 19 | #include <linux/module.h> |
| 20 | |
| 21 | MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions"); |
| 22 | MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); |
| 23 | MODULE_LICENSE("GPL v2"); |
| 24 | |
| 25 | asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src, |
| 26 | int blocks); |
| 27 | |
| 28 | static int sm3_ce_update(struct shash_desc *desc, const u8 *data, |
| 29 | unsigned int len) |
| 30 | { |
| 31 | if (!may_use_simd()) |
| 32 | return crypto_sm3_update(desc, data, len); |
| 33 | |
| 34 | kernel_neon_begin(); |
| 35 | sm3_base_do_update(desc, data, len, sm3_ce_transform); |
| 36 | kernel_neon_end(); |
| 37 | |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | static int sm3_ce_final(struct shash_desc *desc, u8 *out) |
| 42 | { |
| 43 | if (!may_use_simd()) |
| 44 | return crypto_sm3_finup(desc, NULL, 0, out); |
| 45 | |
| 46 | kernel_neon_begin(); |
| 47 | sm3_base_do_finalize(desc, sm3_ce_transform); |
| 48 | kernel_neon_end(); |
| 49 | |
| 50 | return sm3_base_finish(desc, out); |
| 51 | } |
| 52 | |
| 53 | static int sm3_ce_finup(struct shash_desc *desc, const u8 *data, |
| 54 | unsigned int len, u8 *out) |
| 55 | { |
| 56 | if (!may_use_simd()) |
| 57 | return crypto_sm3_finup(desc, data, len, out); |
| 58 | |
| 59 | kernel_neon_begin(); |
| 60 | sm3_base_do_update(desc, data, len, sm3_ce_transform); |
| 61 | kernel_neon_end(); |
| 62 | |
| 63 | return sm3_ce_final(desc, out); |
| 64 | } |
| 65 | |
| 66 | static struct shash_alg sm3_alg = { |
| 67 | .digestsize = SM3_DIGEST_SIZE, |
| 68 | .init = sm3_base_init, |
| 69 | .update = sm3_ce_update, |
| 70 | .final = sm3_ce_final, |
| 71 | .finup = sm3_ce_finup, |
| 72 | .descsize = sizeof(struct sm3_state), |
| 73 | .base.cra_name = "sm3", |
| 74 | .base.cra_driver_name = "sm3-ce", |
| 75 | .base.cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| 76 | .base.cra_blocksize = SM3_BLOCK_SIZE, |
| 77 | .base.cra_module = THIS_MODULE, |
| 78 | .base.cra_priority = 200, |
| 79 | }; |
| 80 | |
| 81 | static int __init sm3_ce_mod_init(void) |
| 82 | { |
| 83 | return crypto_register_shash(&sm3_alg); |
| 84 | } |
| 85 | |
| 86 | static void __exit sm3_ce_mod_fini(void) |
| 87 | { |
| 88 | crypto_unregister_shash(&sm3_alg); |
| 89 | } |
| 90 | |
| 91 | module_cpu_feature_match(SM3, sm3_ce_mod_init); |
| 92 | module_exit(sm3_ce_mod_fini); |