1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * sm3-ce-glue.c - SM3 secure hash using ARMv8.2 Crypto Extensions 4 * 5 * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org> 6 */ 7 8 #include <crypto/internal/hash.h> 9 #include <crypto/sm3.h> 10 #include <crypto/sm3_base.h> 11 #include <linux/cpufeature.h> 12 #include <linux/kernel.h> 13 #include <linux/module.h> 14 15 #include <asm/simd.h> 16 17 MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions"); 18 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); 19 MODULE_LICENSE("GPL v2"); 20 21 asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src, 22 int blocks); 23 24 static int sm3_ce_update(struct shash_desc *desc, const u8 *data, 25 unsigned int len) 26 { 27 int remain; 28 29 scoped_ksimd() { 30 remain = sm3_base_do_update_blocks(desc, data, len, sm3_ce_transform); 31 } 32 return remain; 33 } 34 35 static int sm3_ce_finup(struct shash_desc *desc, const u8 *data, 36 unsigned int len, u8 *out) 37 { 38 scoped_ksimd() { 39 sm3_base_do_finup(desc, data, len, sm3_ce_transform); 40 } 41 return sm3_base_finish(desc, out); 42 } 43 44 static struct shash_alg sm3_alg = { 45 .digestsize = SM3_DIGEST_SIZE, 46 .init = sm3_base_init, 47 .update = sm3_ce_update, 48 .finup = sm3_ce_finup, 49 .descsize = SM3_STATE_SIZE, 50 .base.cra_name = "sm3", 51 .base.cra_driver_name = "sm3-ce", 52 .base.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY | 53 CRYPTO_AHASH_ALG_FINUP_MAX, 54 .base.cra_blocksize = SM3_BLOCK_SIZE, 55 .base.cra_module = THIS_MODULE, 56 .base.cra_priority = 400, 57 }; 58 59 static int __init sm3_ce_mod_init(void) 60 { 61 return crypto_register_shash(&sm3_alg); 62 } 63 64 static void __exit sm3_ce_mod_fini(void) 65 { 66 crypto_unregister_shash(&sm3_alg); 67 } 68 69 module_cpu_feature_match(SM3, sm3_ce_mod_init); 70 module_exit(sm3_ce_mod_fini); 71