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