1 /* SPDX-License-Identifier: GPL-2.0-only */
3  * SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and described
4  * at https://datatracker.ietf.org/doc/html/draft-sca-cfrg-sm3-02
7  * Copyright (C) 2017 Gilad Ben-Yossef <gilad@benyossef.com>
16 	0x79cc4519, 0xf3988a32, 0xe7311465, 0xce6228cb,
17 	0x9cc45197, 0x3988a32f, 0x7311465e, 0xe6228cbc,
18 	0xcc451979, 0x988a32f3, 0x311465e7, 0x6228cbce,
19 	0xc451979c, 0x88a32f39, 0x11465e73, 0x228cbce6,
20 	0x9d8a7a87, 0x3b14f50f, 0x7629ea1e, 0xec53d43c,
21 	0xd8a7a879, 0xb14f50f3, 0x629ea1e7, 0xc53d43ce,
22 	0x8a7a879d, 0x14f50f3b, 0x29ea1e76, 0x53d43cec,
23 	0xa7a879d8, 0x4f50f3b1, 0x9ea1e762, 0x3d43cec5,
24 	0x7a879d8a, 0xf50f3b14, 0xea1e7629, 0xd43cec53,
25 	0xa879d8a7, 0x50f3b14f, 0xa1e7629e, 0x43cec53d,
26 	0x879d8a7a, 0x0f3b14f5, 0x1e7629ea, 0x3cec53d4,
27 	0x79d8a7a8, 0xf3b14f50, 0xe7629ea1, 0xcec53d43,
28 	0x9d8a7a87, 0x3b14f50f, 0x7629ea1e, 0xec53d43c,
29 	0xd8a7a879, 0xb14f50f3, 0x629ea1e7, 0xc53d43ce,
30 	0x8a7a879d, 0x14f50f3b, 0x29ea1e76, 0x53d43cec,
31 	0xa7a879d8, 0x4f50f3b1, 0x9ea1e762, 0x3d43cec5
35  * Transform the message X which consists of 16 32-bit-words. See
36  * GM/T 004-2012 for details.
38 #define R(i, a, b, c, d, e, f, g, h, t, w1, w2)			\  argument
40 		ss1 = rol32((rol32((a), 12) + (e) + (t)), 7);	\
41 		ss2 = ss1 ^ rol32((a), 12);			\
42 		d += FF ## i(a, b, c) + ss2 + ((w1) ^ (w2));	\
43 		h += GG ## i(e, f, g) + ss1 + (w1);		\
47 	} while (0)
49 #define R1(a, b, c, d, e, f, g, h, t, w1, w2) \  argument
50 	R(1, a, b, c, d, e, f, g, h, t, w1, w2)
51 #define R2(a, b, c, d, e, f, g, h, t, w1, w2) \  argument
52 	R(2, a, b, c, d, e, f, g, h, t, w1, w2)
64 #define W1(i) (W[i & 0x0f])
65 #define W2(i) (W[i & 0x0f] =				\
66 		P1(W[i & 0x0f]				\
67 			^ W[(i-9) & 0x0f]		\
68 			^ rol32(W[(i-3) & 0x0f], 15))	\
69 		^ rol32(W[(i-13) & 0x0f], 7)		\
70 		^ W[(i-6) & 0x0f])
74 	u32 a, b, c, d, e, f, g, h, ss1, ss2;  in sm3_transform()  local
76 	a = sctx->state[0];  in sm3_transform()
77 	b = sctx->state[1];  in sm3_transform()
78 	c = sctx->state[2];  in sm3_transform()
79 	d = sctx->state[3];  in sm3_transform()
80 	e = sctx->state[4];  in sm3_transform()
81 	f = sctx->state[5];  in sm3_transform()
82 	g = sctx->state[6];  in sm3_transform()
83 	h = sctx->state[7];  in sm3_transform()
85 	R1(a, b, c, d, e, f, g, h, K[0], I(0), I(4));  in sm3_transform()
86 	R1(d, a, b, c, h, e, f, g, K[1], I(1), I(5));  in sm3_transform()
87 	R1(c, d, a, b, g, h, e, f, K[2], I(2), I(6));  in sm3_transform()
88 	R1(b, c, d, a, f, g, h, e, K[3], I(3), I(7));  in sm3_transform()
89 	R1(a, b, c, d, e, f, g, h, K[4], W1(4), I(8));  in sm3_transform()
90 	R1(d, a, b, c, h, e, f, g, K[5], W1(5), I(9));  in sm3_transform()
91 	R1(c, d, a, b, g, h, e, f, K[6], W1(6), I(10));  in sm3_transform()
92 	R1(b, c, d, a, f, g, h, e, K[7], W1(7), I(11));  in sm3_transform()
93 	R1(a, b, c, d, e, f, g, h, K[8], W1(8), I(12));  in sm3_transform()
94 	R1(d, a, b, c, h, e, f, g, K[9], W1(9), I(13));  in sm3_transform()
95 	R1(c, d, a, b, g, h, e, f, K[10], W1(10), I(14));  in sm3_transform()
96 	R1(b, c, d, a, f, g, h, e, K[11], W1(11), I(15));  in sm3_transform()
97 	R1(a, b, c, d, e, f, g, h, K[12], W1(12), W2(16));  in sm3_transform()
98 	R1(d, a, b, c, h, e, f, g, K[13], W1(13), W2(17));  in sm3_transform()
99 	R1(c, d, a, b, g, h, e, f, K[14], W1(14), W2(18));  in sm3_transform()
100 	R1(b, c, d, a, f, g, h, e, K[15], W1(15), W2(19));  in sm3_transform()
102 	R2(a, b, c, d, e, f, g, h, K[16], W1(16), W2(20));  in sm3_transform()
103 	R2(d, a, b, c, h, e, f, g, K[17], W1(17), W2(21));  in sm3_transform()
104 	R2(c, d, a, b, g, h, e, f, K[18], W1(18), W2(22));  in sm3_transform()
105 	R2(b, c, d, a, f, g, h, e, K[19], W1(19), W2(23));  in sm3_transform()
106 	R2(a, b, c, d, e, f, g, h, K[20], W1(20), W2(24));  in sm3_transform()
107 	R2(d, a, b, c, h, e, f, g, K[21], W1(21), W2(25));  in sm3_transform()
108 	R2(c, d, a, b, g, h, e, f, K[22], W1(22), W2(26));  in sm3_transform()
109 	R2(b, c, d, a, f, g, h, e, K[23], W1(23), W2(27));  in sm3_transform()
110 	R2(a, b, c, d, e, f, g, h, K[24], W1(24), W2(28));  in sm3_transform()
111 	R2(d, a, b, c, h, e, f, g, K[25], W1(25), W2(29));  in sm3_transform()
112 	R2(c, d, a, b, g, h, e, f, K[26], W1(26), W2(30));  in sm3_transform()
113 	R2(b, c, d, a, f, g, h, e, K[27], W1(27), W2(31));  in sm3_transform()
114 	R2(a, b, c, d, e, f, g, h, K[28], W1(28), W2(32));  in sm3_transform()
115 	R2(d, a, b, c, h, e, f, g, K[29], W1(29), W2(33));  in sm3_transform()
116 	R2(c, d, a, b, g, h, e, f, K[30], W1(30), W2(34));  in sm3_transform()
117 	R2(b, c, d, a, f, g, h, e, K[31], W1(31), W2(35));  in sm3_transform()
119 	R2(a, b, c, d, e, f, g, h, K[32], W1(32), W2(36));  in sm3_transform()
120 	R2(d, a, b, c, h, e, f, g, K[33], W1(33), W2(37));  in sm3_transform()
121 	R2(c, d, a, b, g, h, e, f, K[34], W1(34), W2(38));  in sm3_transform()
122 	R2(b, c, d, a, f, g, h, e, K[35], W1(35), W2(39));  in sm3_transform()
123 	R2(a, b, c, d, e, f, g, h, K[36], W1(36), W2(40));  in sm3_transform()
124 	R2(d, a, b, c, h, e, f, g, K[37], W1(37), W2(41));  in sm3_transform()
125 	R2(c, d, a, b, g, h, e, f, K[38], W1(38), W2(42));  in sm3_transform()
126 	R2(b, c, d, a, f, g, h, e, K[39], W1(39), W2(43));  in sm3_transform()
127 	R2(a, b, c, d, e, f, g, h, K[40], W1(40), W2(44));  in sm3_transform()
128 	R2(d, a, b, c, h, e, f, g, K[41], W1(41), W2(45));  in sm3_transform()
129 	R2(c, d, a, b, g, h, e, f, K[42], W1(42), W2(46));  in sm3_transform()
130 	R2(b, c, d, a, f, g, h, e, K[43], W1(43), W2(47));  in sm3_transform()
131 	R2(a, b, c, d, e, f, g, h, K[44], W1(44), W2(48));  in sm3_transform()
132 	R2(d, a, b, c, h, e, f, g, K[45], W1(45), W2(49));  in sm3_transform()
133 	R2(c, d, a, b, g, h, e, f, K[46], W1(46), W2(50));  in sm3_transform()
134 	R2(b, c, d, a, f, g, h, e, K[47], W1(47), W2(51));  in sm3_transform()
136 	R2(a, b, c, d, e, f, g, h, K[48], W1(48), W2(52));  in sm3_transform()
137 	R2(d, a, b, c, h, e, f, g, K[49], W1(49), W2(53));  in sm3_transform()
138 	R2(c, d, a, b, g, h, e, f, K[50], W1(50), W2(54));  in sm3_transform()
139 	R2(b, c, d, a, f, g, h, e, K[51], W1(51), W2(55));  in sm3_transform()
140 	R2(a, b, c, d, e, f, g, h, K[52], W1(52), W2(56));  in sm3_transform()
141 	R2(d, a, b, c, h, e, f, g, K[53], W1(53), W2(57));  in sm3_transform()
142 	R2(c, d, a, b, g, h, e, f, K[54], W1(54), W2(58));  in sm3_transform()
143 	R2(b, c, d, a, f, g, h, e, K[55], W1(55), W2(59));  in sm3_transform()
144 	R2(a, b, c, d, e, f, g, h, K[56], W1(56), W2(60));  in sm3_transform()
145 	R2(d, a, b, c, h, e, f, g, K[57], W1(57), W2(61));  in sm3_transform()
146 	R2(c, d, a, b, g, h, e, f, K[58], W1(58), W2(62));  in sm3_transform()
147 	R2(b, c, d, a, f, g, h, e, K[59], W1(59), W2(63));  in sm3_transform()
148 	R2(a, b, c, d, e, f, g, h, K[60], W1(60), W2(64));  in sm3_transform()
149 	R2(d, a, b, c, h, e, f, g, K[61], W1(61), W2(65));  in sm3_transform()
150 	R2(c, d, a, b, g, h, e, f, K[62], W1(62), W2(66));  in sm3_transform()
151 	R2(b, c, d, a, f, g, h, e, K[63], W1(63), W2(67));  in sm3_transform()
153 	sctx->state[0] ^= a;  in sm3_transform()
154 	sctx->state[1] ^= b;  in sm3_transform()
155 	sctx->state[2] ^= c;  in sm3_transform()
156 	sctx->state[3] ^= d;  in sm3_transform()
157 	sctx->state[4] ^= e;  in sm3_transform()
158 	sctx->state[5] ^= f;  in sm3_transform()
159 	sctx->state[6] ^= g;  in sm3_transform()
160 	sctx->state[7] ^= h;  in sm3_transform()
172 	while (blocks--) {  in sm3_block()
180 	unsigned int partial = sctx->count % SM3_BLOCK_SIZE;  in sm3_update()
183 	sctx->count += len;  in sm3_update()
189 			int p = SM3_BLOCK_SIZE - partial;  in sm3_update()
191 			memcpy(sctx->buffer + partial, data, p);  in sm3_update()
193 			len -= p;  in sm3_update()
195 			sm3_block(sctx, sctx->buffer, 1, W);  in sm3_update()
208 		partial = 0;  in sm3_update()
211 		memcpy(sctx->buffer + partial, data, len);  in sm3_update()
217 	const int bit_offset = SM3_BLOCK_SIZE - sizeof(u64);  in sm3_final()
218 	__be64 *bits = (__be64 *)(sctx->buffer + bit_offset);  in sm3_final()
220 	unsigned int partial = sctx->count % SM3_BLOCK_SIZE;  in sm3_final()
224 	sctx->buffer[partial++] = 0x80;  in sm3_final()
226 		memset(sctx->buffer + partial, 0, SM3_BLOCK_SIZE - partial);  in sm3_final()
227 		partial = 0;  in sm3_final()
229 		sm3_block(sctx, sctx->buffer, 1, W);  in sm3_final()
232 	memset(sctx->buffer + partial, 0, bit_offset - partial);  in sm3_final()
233 	*bits = cpu_to_be64(sctx->count << 3);  in sm3_final()
234 	sm3_block(sctx, sctx->buffer, 1, W);  in sm3_final()
236 	for (i = 0; i < 8; i++)  in sm3_final()
237 		put_unaligned_be32(sctx->state[i], digest++);  in sm3_final()