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 <linux/init.h> 13 #include <linux/module.h> 14 #include <linux/mm.h> 15 #include <linux/types.h> 16 #include <crypto/sm3.h> 17 #include <crypto/sm3_base.h> 18 #include <linux/bitops.h> 19 #include <asm/byteorder.h> 20 #include <asm/unaligned.h> 21 22 const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = { 23 0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F, 24 0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x1A, 0x8F, 25 0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0xFB, 0x74, 26 0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B 27 }; 28 EXPORT_SYMBOL_GPL(sm3_zero_message_hash); 29 30 static int crypto_sm3_update(struct shash_desc *desc, const u8 *data, 31 unsigned int len) 32 { 33 sm3_update(shash_desc_ctx(desc), data, len); 34 return 0; 35 } 36 37 static int crypto_sm3_final(struct shash_desc *desc, u8 *out) 38 { 39 sm3_final(shash_desc_ctx(desc), out); 40 return 0; 41 } 42 43 static int crypto_sm3_finup(struct shash_desc *desc, const u8 *data, 44 unsigned int len, u8 *hash) 45 { 46 struct sm3_state *sctx = shash_desc_ctx(desc); 47 48 if (len) 49 sm3_update(sctx, data, len); 50 sm3_final(sctx, hash); 51 return 0; 52 } 53 54 static struct shash_alg sm3_alg = { 55 .digestsize = SM3_DIGEST_SIZE, 56 .init = sm3_base_init, 57 .update = crypto_sm3_update, 58 .final = crypto_sm3_final, 59 .finup = crypto_sm3_finup, 60 .descsize = sizeof(struct sm3_state), 61 .base = { 62 .cra_name = "sm3", 63 .cra_driver_name = "sm3-generic", 64 .cra_priority = 100, 65 .cra_blocksize = SM3_BLOCK_SIZE, 66 .cra_module = THIS_MODULE, 67 } 68 }; 69 70 static int __init sm3_generic_mod_init(void) 71 { 72 return crypto_register_shash(&sm3_alg); 73 } 74 75 static void __exit sm3_generic_mod_fini(void) 76 { 77 crypto_unregister_shash(&sm3_alg); 78 } 79 80 subsys_initcall(sm3_generic_mod_init); 81 module_exit(sm3_generic_mod_fini); 82 83 MODULE_LICENSE("GPL v2"); 84 MODULE_DESCRIPTION("SM3 Secure Hash Algorithm"); 85 86 MODULE_ALIAS_CRYPTO("sm3"); 87 MODULE_ALIAS_CRYPTO("sm3-generic"); 88