summaryrefslogtreecommitdiffstats
path: root/src/cmd/internal/notsha256/sha256block_386.s
blob: 0e27fa02d7e708cb9ba3ac4a8cf20e32fd39ffd0 (plain)
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
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build !purego

// SHA256 block routine. See sha256block.go for Go equivalent.
//
// The algorithm is detailed in FIPS 180-4:
//
//  https://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
//
// Wt = Mt; for 0 <= t <= 15
// Wt = SIGMA1(Wt-2) + SIGMA0(Wt-15) + Wt-16; for 16 <= t <= 63
//
// a = H0
// b = H1
// c = H2
// d = H3
// e = H4
// f = H5
// g = H6
// h = H7
//
// for t = 0 to 63 {
//    T1 = h + BIGSIGMA1(e) + Ch(e,f,g) + Kt + Wt
//    T2 = BIGSIGMA0(a) + Maj(a,b,c)
//    h = g
//    g = f
//    f = e
//    e = d + T1
//    d = c
//    c = b
//    b = a
//    a = T1 + T2
// }
//
// H0 = a + H0
// H1 = b + H1
// H2 = c + H2
// H3 = d + H3
// H4 = e + H4
// H5 = f + H5
// H6 = g + H6
// H7 = h + H7

// Wt = Mt; for 0 <= t <= 15
#define MSGSCHEDULE0(index) \
	MOVL	(index*4)(SI), AX; \
	BSWAPL	AX; \
	MOVL	AX, (index*4)(BP)

// Wt = SIGMA1(Wt-2) + Wt-7 + SIGMA0(Wt-15) + Wt-16; for 16 <= t <= 63
//   SIGMA0(x) = ROTR(7,x) XOR ROTR(18,x) XOR SHR(3,x)
//   SIGMA1(x) = ROTR(17,x) XOR ROTR(19,x) XOR SHR(10,x)
#define MSGSCHEDULE1(index) \
	MOVL	((index-2)*4)(BP), AX; \
	MOVL	AX, CX; \
	RORL	$17, AX; \
	MOVL	CX, DX; \
	RORL	$19, CX; \
	SHRL	$10, DX; \
	MOVL	((index-15)*4)(BP), BX; \
	XORL	CX, AX; \
	MOVL	BX, CX; \
	XORL	DX, AX; \
	RORL	$7, BX; \
	MOVL	CX, DX; \
	SHRL	$3, DX; \
	RORL	$18, CX; \
	ADDL	((index-7)*4)(BP), AX; \
	XORL	CX, BX; \
	XORL	DX, BX; \
	ADDL	((index-16)*4)(BP), BX; \
	ADDL	BX, AX; \
	MOVL	AX, ((index)*4)(BP)

// Calculate T1 in AX - uses AX, BX, CX and DX registers.
// Wt is passed in AX.
//   T1 = h + BIGSIGMA1(e) + Ch(e, f, g) + Kt + Wt
//     BIGSIGMA1(x) = ROTR(6,x) XOR ROTR(11,x) XOR ROTR(25,x)
//     Ch(x, y, z) = (x AND y) XOR (NOT x AND z)
#define SHA256T1(const, e, f, g, h) \
	MOVL	(h*4)(DI), BX; \
	ADDL	AX, BX; \
	MOVL	(e*4)(DI), AX; \
	ADDL	$const, BX; \
	MOVL	(e*4)(DI), CX; \
	RORL	$6, AX; \
	MOVL	(e*4)(DI), DX; \
	RORL	$11, CX; \
	XORL	CX, AX; \
	MOVL	(e*4)(DI), CX; \
	RORL	$25, DX; \
	ANDL	(f*4)(DI), CX; \
	XORL	AX, DX; \
	MOVL	(e*4)(DI), AX; \
	NOTL	AX; \
	ADDL	DX, BX; \
	ANDL	(g*4)(DI), AX; \
	XORL	CX, AX; \
	ADDL	BX, AX

// Calculate T2 in BX - uses AX, BX, CX and DX registers.
//   T2 = BIGSIGMA0(a) + Maj(a, b, c)
//     BIGSIGMA0(x) = ROTR(2,x) XOR ROTR(13,x) XOR ROTR(22,x)
//     Maj(x, y, z) = (x AND y) XOR (x AND z) XOR (y AND z)
#define SHA256T2(a, b, c) \
	MOVL	(a*4)(DI), AX; \
	MOVL	(c*4)(DI), BX; \
	RORL	$2, AX; \
	MOVL	(a*4)(DI), DX; \
	ANDL	(b*4)(DI), BX; \
	RORL	$13, DX; \
	MOVL	(a*4)(DI), CX; \
	ANDL	(c*4)(DI), CX; \
	XORL	DX, AX; \
	XORL	CX, BX; \
	MOVL	(a*4)(DI), DX; \
	MOVL	(b*4)(DI), CX; \
	RORL	$22, DX; \
	ANDL	(a*4)(DI), CX; \
	XORL	CX, BX; \
	XORL	DX, AX; \
	ADDL	AX, BX

// Calculate T1 and T2, then e = d + T1 and a = T1 + T2.
// The values for e and a are stored in d and h, ready for rotation.
#define SHA256ROUND(index, const, a, b, c, d, e, f, g, h) \
	SHA256T1(const, e, f, g, h); \
	MOVL	AX, 292(SP); \
	SHA256T2(a, b, c); \
	MOVL	292(SP), AX; \
	ADDL	AX, BX; \
	ADDL	AX, (d*4)(DI); \
	MOVL	BX, (h*4)(DI)

#define SHA256ROUND0(index, const, a, b, c, d, e, f, g, h) \
	MSGSCHEDULE0(index); \
	SHA256ROUND(index, const, a, b, c, d, e, f, g, h)

#define SHA256ROUND1(index, const, a, b, c, d, e, f, g, h) \
	MSGSCHEDULE1(index); \
	SHA256ROUND(index, const, a, b, c, d, e, f, g, h)

TEXT ·block(SB),0,$296-16
	MOVL	p_base+4(FP), SI
	MOVL	p_len+8(FP), DX
	SHRL	$6, DX
	SHLL	$6, DX

	LEAL	(SI)(DX*1), DI
	MOVL	DI, 288(SP)
	CMPL	SI, DI
	JEQ	end

	LEAL	256(SP), DI		// variables

	MOVL	dig+0(FP), BP
	MOVL	(0*4)(BP), AX		// a = H0
	MOVL	AX, (0*4)(DI)
	MOVL	(1*4)(BP), BX		// b = H1
	MOVL	BX, (1*4)(DI)
	MOVL	(2*4)(BP), CX		// c = H2
	MOVL	CX, (2*4)(DI)
	MOVL	(3*4)(BP), DX		// d = H3
	MOVL	DX, (3*4)(DI)
	MOVL	(4*4)(BP), AX		// e = H4
	MOVL	AX, (4*4)(DI)
	MOVL	(5*4)(BP), BX		// f = H5
	MOVL	BX, (5*4)(DI)
	MOVL	(6*4)(BP), CX		// g = H6
	MOVL	CX, (6*4)(DI)
	MOVL	(7*4)(BP), DX		// h = H7
	MOVL	DX, (7*4)(DI)

loop:
	MOVL	SP, BP			// message schedule

	SHA256ROUND0(0, 0x428a2f98, 0, 1, 2, 3, 4, 5, 6, 7)
	SHA256ROUND0(1, 0x71374491, 7, 0, 1, 2, 3, 4, 5, 6)
	SHA256ROUND0(2, 0xb5c0fbcf, 6, 7, 0, 1, 2, 3, 4, 5)
	SHA256ROUND0(3, 0xe9b5dba5, 5, 6, 7, 0, 1, 2, 3, 4)
	SHA256ROUND0(4, 0x3956c25b, 4, 5, 6, 7, 0, 1, 2, 3)
	SHA256ROUND0(5, 0x59f111f1, 3, 4, 5, 6, 7, 0, 1, 2)
	SHA256ROUND0(6, 0x923f82a4, 2, 3, 4, 5, 6, 7, 0, 1)
	SHA256ROUND0(7, 0xab1c5ed5, 1, 2, 3, 4, 5, 6, 7, 0)
	SHA256ROUND0(8, 0xd807aa98, 0, 1, 2, 3, 4, 5, 6, 7)
	SHA256ROUND0(9, 0x12835b01, 7, 0, 1, 2, 3, 4, 5, 6)
	SHA256ROUND0(10, 0x243185be, 6, 7, 0, 1, 2, 3, 4, 5)
	SHA256ROUND0(11, 0x550c7dc3, 5, 6, 7, 0, 1, 2, 3, 4)
	SHA256ROUND0(12, 0x72be5d74, 4, 5, 6, 7, 0, 1, 2, 3)
	SHA256ROUND0(13, 0x80deb1fe, 3, 4, 5, 6, 7, 0, 1, 2)
	SHA256ROUND0(14, 0x9bdc06a7, 2, 3, 4, 5, 6, 7, 0, 1)
	SHA256ROUND0(15, 0xc19bf174, 1, 2, 3, 4, 5, 6, 7, 0)

	SHA256ROUND1(16, 0xe49b69c1, 0, 1, 2, 3, 4, 5, 6, 7)
	SHA256ROUND1(17, 0xefbe4786, 7, 0, 1, 2, 3, 4, 5, 6)
	SHA256ROUND1(18, 0x0fc19dc6, 6, 7, 0, 1, 2, 3, 4, 5)
	SHA256ROUND1(19, 0x240ca1cc, 5, 6, 7, 0, 1, 2, 3, 4)
	SHA256ROUND1(20, 0x2de92c6f, 4, 5, 6, 7, 0, 1, 2, 3)
	SHA256ROUND1(21, 0x4a7484aa, 3, 4, 5, 6, 7, 0, 1, 2)
	SHA256ROUND1(22, 0x5cb0a9dc, 2, 3, 4, 5, 6, 7, 0, 1)
	SHA256ROUND1(23, 0x76f988da, 1, 2, 3, 4, 5, 6, 7, 0)
	SHA256ROUND1(24, 0x983e5152, 0, 1, 2, 3, 4, 5, 6, 7)
	SHA256ROUND1(25, 0xa831c66d, 7, 0, 1, 2, 3, 4, 5, 6)
	SHA256ROUND1(26, 0xb00327c8, 6, 7, 0, 1, 2, 3, 4, 5)
	SHA256ROUND1(27, 0xbf597fc7, 5, 6, 7, 0, 1, 2, 3, 4)
	SHA256ROUND1(28, 0xc6e00bf3, 4, 5, 6, 7, 0, 1, 2, 3)
	SHA256ROUND1(29, 0xd5a79147, 3, 4, 5, 6, 7, 0, 1, 2)
	SHA256ROUND1(30, 0x06ca6351, 2, 3, 4, 5, 6, 7, 0, 1)
	SHA256ROUND1(31, 0x14292967, 1, 2, 3, 4, 5, 6, 7, 0)
	SHA256ROUND1(32, 0x27b70a85, 0, 1, 2, 3, 4, 5, 6, 7)
	SHA256ROUND1(33, 0x2e1b2138, 7, 0, 1, 2, 3, 4, 5, 6)
	SHA256ROUND1(34, 0x4d2c6dfc, 6, 7, 0, 1, 2, 3, 4, 5)
	SHA256ROUND1(35, 0x53380d13, 5, 6, 7, 0, 1, 2, 3, 4)
	SHA256ROUND1(36, 0x650a7354, 4, 5, 6, 7, 0, 1, 2, 3)
	SHA256ROUND1(37, 0x766a0abb, 3, 4, 5, 6, 7, 0, 1, 2)
	SHA256ROUND1(38, 0x81c2c92e, 2, 3, 4, 5, 6, 7, 0, 1)
	SHA256ROUND1(39, 0x92722c85, 1, 2, 3, 4, 5, 6, 7, 0)
	SHA256ROUND1(40, 0xa2bfe8a1, 0, 1, 2, 3, 4, 5, 6, 7)
	SHA256ROUND1(41, 0xa81a664b, 7, 0, 1, 2, 3, 4, 5, 6)
	SHA256ROUND1(42, 0xc24b8b70, 6, 7, 0, 1, 2, 3, 4, 5)
	SHA256ROUND1(43, 0xc76c51a3, 5, 6, 7, 0, 1, 2, 3, 4)
	SHA256ROUND1(44, 0xd192e819, 4, 5, 6, 7, 0, 1, 2, 3)
	SHA256ROUND1(45, 0xd6990624, 3, 4, 5, 6, 7, 0, 1, 2)
	SHA256ROUND1(46, 0xf40e3585, 2, 3, 4, 5, 6, 7, 0, 1)
	SHA256ROUND1(47, 0x106aa070, 1, 2, 3, 4, 5, 6, 7, 0)
	SHA256ROUND1(48, 0x19a4c116, 0, 1, 2, 3, 4, 5, 6, 7)
	SHA256ROUND1(49, 0x1e376c08, 7, 0, 1, 2, 3, 4, 5, 6)
	SHA256ROUND1(50, 0x2748774c, 6, 7, 0, 1, 2, 3, 4, 5)
	SHA256ROUND1(51, 0x34b0bcb5, 5, 6, 7, 0, 1, 2, 3, 4)
	SHA256ROUND1(52, 0x391c0cb3, 4, 5, 6, 7, 0, 1, 2, 3)
	SHA256ROUND1(53, 0x4ed8aa4a, 3, 4, 5, 6, 7, 0, 1, 2)
	SHA256ROUND1(54, 0x5b9cca4f, 2, 3, 4, 5, 6, 7, 0, 1)
	SHA256ROUND1(55, 0x682e6ff3, 1, 2, 3, 4, 5, 6, 7, 0)
	SHA256ROUND1(56, 0x748f82ee, 0, 1, 2, 3, 4, 5, 6, 7)
	SHA256ROUND1(57, 0x78a5636f, 7, 0, 1, 2, 3, 4, 5, 6)
	SHA256ROUND1(58, 0x84c87814, 6, 7, 0, 1, 2, 3, 4, 5)
	SHA256ROUND1(59, 0x8cc70208, 5, 6, 7, 0, 1, 2, 3, 4)
	SHA256ROUND1(60, 0x90befffa, 4, 5, 6, 7, 0, 1, 2, 3)
	SHA256ROUND1(61, 0xa4506ceb, 3, 4, 5, 6, 7, 0, 1, 2)
	SHA256ROUND1(62, 0xbef9a3f7, 2, 3, 4, 5, 6, 7, 0, 1)
	SHA256ROUND1(63, 0xc67178f2, 1, 2, 3, 4, 5, 6, 7, 0)

	MOVL	dig+0(FP), BP
	MOVL	(0*4)(BP), AX		// H0 = a + H0
	ADDL	(0*4)(DI), AX
	MOVL	AX, (0*4)(DI)
	MOVL	AX, (0*4)(BP)
	MOVL	(1*4)(BP), BX		// H1 = b + H1
	ADDL	(1*4)(DI), BX
	MOVL	BX, (1*4)(DI)
	MOVL	BX, (1*4)(BP)
	MOVL	(2*4)(BP), CX		// H2 = c + H2
	ADDL	(2*4)(DI), CX
	MOVL	CX, (2*4)(DI)
	MOVL	CX, (2*4)(BP)
	MOVL	(3*4)(BP), DX		// H3 = d + H3
	ADDL	(3*4)(DI), DX
	MOVL	DX, (3*4)(DI)
	MOVL	DX, (3*4)(BP)
	MOVL	(4*4)(BP), AX		// H4 = e + H4
	ADDL	(4*4)(DI), AX
	MOVL	AX, (4*4)(DI)
	MOVL	AX, (4*4)(BP)
	MOVL	(5*4)(BP), BX		// H5 = f + H5
	ADDL	(5*4)(DI), BX
	MOVL	BX, (5*4)(DI)
	MOVL	BX, (5*4)(BP)
	MOVL	(6*4)(BP), CX		// H6 = g + H6
	ADDL	(6*4)(DI), CX
	MOVL	CX, (6*4)(DI)
	MOVL	CX, (6*4)(BP)
	MOVL	(7*4)(BP), DX		// H7 = h + H7
	ADDL	(7*4)(DI), DX
	MOVL	DX, (7*4)(DI)
	MOVL	DX, (7*4)(BP)

	ADDL	$64, SI
	CMPL	SI, 288(SP)
	JB	loop

end:
	RET