1 // SPDX-License-Identifier: GPL-2.0-only 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* 2 /*
3 * SM3 secure hash, as specified by OSCCA GM/T 3 * SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and
4 * described at https://tools.ietf.org/html/dr 4 * described at https://tools.ietf.org/html/draft-shen-sm3-hash-01
5 * 5 *
6 * Copyright (C) 2017 ARM Limited or its affil 6 * Copyright (C) 2017 ARM Limited or its affiliates.
7 * Written by Gilad Ben-Yossef <gilad@benyosse 7 * Written by Gilad Ben-Yossef <gilad@benyossef.com>
8 * Copyright (C) 2021 Tianjia Zhang <tianjia.z <<
9 */ 8 */
10 9
11 #include <crypto/internal/hash.h> 10 #include <crypto/internal/hash.h>
12 #include <linux/init.h> 11 #include <linux/init.h>
13 #include <linux/module.h> 12 #include <linux/module.h>
14 #include <linux/mm.h> 13 #include <linux/mm.h>
15 #include <linux/types.h> 14 #include <linux/types.h>
16 #include <crypto/sm3.h> 15 #include <crypto/sm3.h>
17 #include <crypto/sm3_base.h> 16 #include <crypto/sm3_base.h>
18 #include <linux/bitops.h> 17 #include <linux/bitops.h>
19 #include <asm/byteorder.h> 18 #include <asm/byteorder.h>
20 #include <asm/unaligned.h> 19 #include <asm/unaligned.h>
21 20
22 const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE 21 const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = {
23 0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0x 22 0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F,
24 0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x 23 0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x1A, 0x8F,
25 0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0x 24 0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0xFB, 0x74,
26 0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0x 25 0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B
27 }; 26 };
28 EXPORT_SYMBOL_GPL(sm3_zero_message_hash); 27 EXPORT_SYMBOL_GPL(sm3_zero_message_hash);
29 28
30 static int crypto_sm3_update(struct shash_desc !! 29 static inline u32 p0(u32 x)
>> 30 {
>> 31 return x ^ rol32(x, 9) ^ rol32(x, 17);
>> 32 }
>> 33
>> 34 static inline u32 p1(u32 x)
>> 35 {
>> 36 return x ^ rol32(x, 15) ^ rol32(x, 23);
>> 37 }
>> 38
>> 39 static inline u32 ff(unsigned int n, u32 a, u32 b, u32 c)
>> 40 {
>> 41 return (n < 16) ? (a ^ b ^ c) : ((a & b) | (a & c) | (b & c));
>> 42 }
>> 43
>> 44 static inline u32 gg(unsigned int n, u32 e, u32 f, u32 g)
>> 45 {
>> 46 return (n < 16) ? (e ^ f ^ g) : ((e & f) | ((~e) & g));
>> 47 }
>> 48
>> 49 static inline u32 t(unsigned int n)
>> 50 {
>> 51 return (n < 16) ? SM3_T1 : SM3_T2;
>> 52 }
>> 53
>> 54 static void sm3_expand(u32 *t, u32 *w, u32 *wt)
>> 55 {
>> 56 int i;
>> 57 unsigned int tmp;
>> 58
>> 59 /* load the input */
>> 60 for (i = 0; i <= 15; i++)
>> 61 w[i] = get_unaligned_be32((__u32 *)t + i);
>> 62
>> 63 for (i = 16; i <= 67; i++) {
>> 64 tmp = w[i - 16] ^ w[i - 9] ^ rol32(w[i - 3], 15);
>> 65 w[i] = p1(tmp) ^ (rol32(w[i - 13], 7)) ^ w[i - 6];
>> 66 }
>> 67
>> 68 for (i = 0; i <= 63; i++)
>> 69 wt[i] = w[i] ^ w[i + 4];
>> 70 }
>> 71
>> 72 static void sm3_compress(u32 *w, u32 *wt, u32 *m)
>> 73 {
>> 74 u32 ss1;
>> 75 u32 ss2;
>> 76 u32 tt1;
>> 77 u32 tt2;
>> 78 u32 a, b, c, d, e, f, g, h;
>> 79 int i;
>> 80
>> 81 a = m[0];
>> 82 b = m[1];
>> 83 c = m[2];
>> 84 d = m[3];
>> 85 e = m[4];
>> 86 f = m[5];
>> 87 g = m[6];
>> 88 h = m[7];
>> 89
>> 90 for (i = 0; i <= 63; i++) {
>> 91
>> 92 ss1 = rol32((rol32(a, 12) + e + rol32(t(i), i & 31)), 7);
>> 93
>> 94 ss2 = ss1 ^ rol32(a, 12);
>> 95
>> 96 tt1 = ff(i, a, b, c) + d + ss2 + *wt;
>> 97 wt++;
>> 98
>> 99 tt2 = gg(i, e, f, g) + h + ss1 + *w;
>> 100 w++;
>> 101
>> 102 d = c;
>> 103 c = rol32(b, 9);
>> 104 b = a;
>> 105 a = tt1;
>> 106 h = g;
>> 107 g = rol32(f, 19);
>> 108 f = e;
>> 109 e = p0(tt2);
>> 110 }
>> 111
>> 112 m[0] = a ^ m[0];
>> 113 m[1] = b ^ m[1];
>> 114 m[2] = c ^ m[2];
>> 115 m[3] = d ^ m[3];
>> 116 m[4] = e ^ m[4];
>> 117 m[5] = f ^ m[5];
>> 118 m[6] = g ^ m[6];
>> 119 m[7] = h ^ m[7];
>> 120
>> 121 a = b = c = d = e = f = g = h = ss1 = ss2 = tt1 = tt2 = 0;
>> 122 }
>> 123
>> 124 static void sm3_transform(struct sm3_state *sst, u8 const *src)
>> 125 {
>> 126 unsigned int w[68];
>> 127 unsigned int wt[64];
>> 128
>> 129 sm3_expand((u32 *)src, w, wt);
>> 130 sm3_compress(w, wt, sst->state);
>> 131
>> 132 memzero_explicit(w, sizeof(w));
>> 133 memzero_explicit(wt, sizeof(wt));
>> 134 }
>> 135
>> 136 static void sm3_generic_block_fn(struct sm3_state *sst, u8 const *src,
>> 137 int blocks)
>> 138 {
>> 139 while (blocks--) {
>> 140 sm3_transform(sst, src);
>> 141 src += SM3_BLOCK_SIZE;
>> 142 }
>> 143 }
>> 144
>> 145 int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
31 unsigned int len) 146 unsigned int len)
32 { 147 {
33 sm3_update(shash_desc_ctx(desc), data, !! 148 return sm3_base_do_update(desc, data, len, sm3_generic_block_fn);
34 return 0; <<
35 } 149 }
>> 150 EXPORT_SYMBOL(crypto_sm3_update);
36 151
37 static int crypto_sm3_final(struct shash_desc !! 152 static int sm3_final(struct shash_desc *desc, u8 *out)
38 { 153 {
39 sm3_final(shash_desc_ctx(desc), out); !! 154 sm3_base_do_finalize(desc, sm3_generic_block_fn);
40 return 0; !! 155 return sm3_base_finish(desc, out);
41 } 156 }
42 157
43 static int crypto_sm3_finup(struct shash_desc !! 158 int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
44 unsigned int len, u8 * 159 unsigned int len, u8 *hash)
45 { 160 {
46 struct sm3_state *sctx = shash_desc_ct !! 161 sm3_base_do_update(desc, data, len, sm3_generic_block_fn);
47 !! 162 return sm3_final(desc, hash);
48 if (len) <<
49 sm3_update(sctx, data, len); <<
50 sm3_final(sctx, hash); <<
51 return 0; <<
52 } 163 }
>> 164 EXPORT_SYMBOL(crypto_sm3_finup);
53 165
54 static struct shash_alg sm3_alg = { 166 static struct shash_alg sm3_alg = {
55 .digestsize = SM3_DIGEST_SIZ 167 .digestsize = SM3_DIGEST_SIZE,
56 .init = sm3_base_init, 168 .init = sm3_base_init,
57 .update = crypto_sm3_upd 169 .update = crypto_sm3_update,
58 .final = crypto_sm3_fin !! 170 .final = sm3_final,
59 .finup = crypto_sm3_fin 171 .finup = crypto_sm3_finup,
60 .descsize = sizeof(struct 172 .descsize = sizeof(struct sm3_state),
61 .base = { 173 .base = {
62 .cra_name = "sm3", 174 .cra_name = "sm3",
63 .cra_driver_name = "sm3-g 175 .cra_driver_name = "sm3-generic",
64 .cra_priority = 100, <<
65 .cra_blocksize = SM3_BL 176 .cra_blocksize = SM3_BLOCK_SIZE,
66 .cra_module = THIS_M 177 .cra_module = THIS_MODULE,
67 } 178 }
68 }; 179 };
69 180
70 static int __init sm3_generic_mod_init(void) 181 static int __init sm3_generic_mod_init(void)
71 { 182 {
72 return crypto_register_shash(&sm3_alg) 183 return crypto_register_shash(&sm3_alg);
73 } 184 }
74 185
75 static void __exit sm3_generic_mod_fini(void) 186 static void __exit sm3_generic_mod_fini(void)
76 { 187 {
77 crypto_unregister_shash(&sm3_alg); 188 crypto_unregister_shash(&sm3_alg);
78 } 189 }
79 190
80 subsys_initcall(sm3_generic_mod_init); 191 subsys_initcall(sm3_generic_mod_init);
81 module_exit(sm3_generic_mod_fini); 192 module_exit(sm3_generic_mod_fini);
82 193
83 MODULE_LICENSE("GPL v2"); 194 MODULE_LICENSE("GPL v2");
84 MODULE_DESCRIPTION("SM3 Secure Hash Algorithm" 195 MODULE_DESCRIPTION("SM3 Secure Hash Algorithm");
85 196
86 MODULE_ALIAS_CRYPTO("sm3"); 197 MODULE_ALIAS_CRYPTO("sm3");
87 MODULE_ALIAS_CRYPTO("sm3-generic"); 198 MODULE_ALIAS_CRYPTO("sm3-generic");
88 199
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