1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and 4 * described at https://tools.ietf.org/html/draft-shen-sm3-hash-01 5 * 6 * Copyright (C) 2017 ARM Limited or its affiliates. 7 * Written by Gilad Ben-Yossef <gilad@benyossef.com> 8 * Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com> 9 */ 10 11 #include <crypto/internal/hash.h> 12 #include <crypto/sm3.h> 13 #include <crypto/sm3_base.h> 14 #include <linux/kernel.h> 15 #include <linux/module.h> 16 17 const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = { 18 0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F, 19 0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x1A, 0x8F, 20 0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0xFB, 0x74, 21 0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B 22 }; 23 EXPORT_SYMBOL_GPL(sm3_zero_message_hash); 24 25 static int crypto_sm3_update(struct shash_desc *desc, const u8 *data, 26 unsigned int len) 27 { 28 return sm3_base_do_update_blocks(desc, data, len, sm3_block_generic); 29 } 30 31 static int crypto_sm3_finup(struct shash_desc *desc, const u8 *data, 32 unsigned int len, u8 *hash) 33 { 34 sm3_base_do_finup(desc, data, len, sm3_block_generic); 35 return sm3_base_finish(desc, hash); 36 } 37 38 static struct shash_alg sm3_alg = { 39 .digestsize = SM3_DIGEST_SIZE, 40 .init = sm3_base_init, 41 .update = crypto_sm3_update, 42 .finup = crypto_sm3_finup, 43 .descsize = SM3_STATE_SIZE, 44 .base = { 45 .cra_name = "sm3", 46 .cra_driver_name = "sm3-generic", 47 .cra_priority = 100, 48 .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY | 49 CRYPTO_AHASH_ALG_FINUP_MAX, 50 .cra_blocksize = SM3_BLOCK_SIZE, 51 .cra_module = THIS_MODULE, 52 } 53 }; 54 55 static int __init sm3_generic_mod_init(void) 56 { 57 return crypto_register_shash(&sm3_alg); 58 } 59 60 static void __exit sm3_generic_mod_fini(void) 61 { 62 crypto_unregister_shash(&sm3_alg); 63 } 64 65 module_init(sm3_generic_mod_init); 66 module_exit(sm3_generic_mod_fini); 67 68 MODULE_LICENSE("GPL v2"); 69 MODULE_DESCRIPTION("SM3 Secure Hash Algorithm"); 70 71 MODULE_ALIAS_CRYPTO("sm3"); 72 MODULE_ALIAS_CRYPTO("sm3-generic"); 73