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
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
|
/* See LICENSE file for copyright and license details. */
#include "common.h"
#include <stdatomic.h>
#if defined(__SSE4_1__) && defined(__SSSE3__) && defined(__SSE2__) && defined(__SHA__)
# define HAVE_X86_SHA_INTRINSICS
#endif
#ifdef HAVE_X86_SHA_INTRINSICS
# include <immintrin.h>
#endif
static inline uint_least32_t
rorl(uint_least32_t n, int k)
{
return TRUNC32((n << k) | (n >> (32 - k)));
}
static size_t
process_portable(struct libsha1_state *restrict state, const unsigned char *restrict data, size_t len)
{
#define F0(B, C, D) (D ^ (B & (C ^ D)))
#define F1(B, C, D) (B ^ C ^ D)
#define F2(B, C, D) ((B & C) | (D & (B | C)))
#define F3(B, C, D) (B ^ C ^ D)
#define G_(A, B, C, D, E, I, F, X) (E = TRUNC32(E + rorl(A, 5) + F(B, C, D) + state->w[I] + (uint_least32_t)X##UL), B = rorl(B, 30))
#define G0(A, B, C, D, E, I) G_(A, B, C, D, E, I, F0, 0x5A827999)
#define G1(A, B, C, D, E, I) G_(A, B, C, D, E, I, F1, 0x6ED9EBA1)
#define G2(A, B, C, D, E, I) G_(A, B, C, D, E, I, F2, 0x8F1BBCDC)
#define G3(A, B, C, D, E, I) G_(A, B, C, D, E, I, F3, 0xCA62C1D6)
uint_least32_t a, b, c, d, e;
const unsigned char *restrict chunk;
int i;
size_t off = 0;
for (; len >= off + sizeof(state->chunk); off += sizeof(state->chunk)) {
chunk = &data[off];
for (i = 0; i < 16; i++) {
state->w[i] = (uint_least32_t)chunk[4 * i + 0] << 24;
state->w[i] |= (uint_least32_t)chunk[4 * i + 1] << 16;
state->w[i] |= (uint_least32_t)chunk[4 * i + 2] << 8;
state->w[i] |= (uint_least32_t)chunk[4 * i + 3];
}
if (state->algorithm == LIBSHA1_1) {
for (; i < 80; i++)
state->w[i] = rorl(state->w[i - 3] ^ state->w[i - 8] ^ state->w[i - 14] ^ state->w[i - 16], 1);
} else {
for (; i < 80; i++)
state->w[i] = state->w[i - 3] ^ state->w[i - 8] ^ state->w[i - 14] ^ state->w[i - 16];
}
a = state->h[0];
b = state->h[1];
c = state->h[2];
d = state->h[3];
e = state->h[4];
for (i = 0; i < 20;) {
G0(a, b, c, d, e, i++);
G0(e, a, b, c, d, i++);
G0(d, e, a, b, c, i++);
G0(c, d, e, a, b, i++);
G0(b, c, d, e, a, i++);
}
while (i < 40) {
G1(a, b, c, d, e, i++);
G1(e, a, b, c, d, i++);
G1(d, e, a, b, c, i++);
G1(c, d, e, a, b, i++);
G1(b, c, d, e, a, i++);
}
while (i < 60) {
G2(a, b, c, d, e, i++);
G2(e, a, b, c, d, i++);
G2(d, e, a, b, c, i++);
G2(c, d, e, a, b, i++);
G2(b, c, d, e, a, i++);
}
while (i < 80) {
G3(a, b, c, d, e, i++);
G3(e, a, b, c, d, i++);
G3(d, e, a, b, c, i++);
G3(c, d, e, a, b, i++);
G3(b, c, d, e, a, i++);
}
state->h[0] = TRUNC32(state->h[0] + a);
state->h[1] = TRUNC32(state->h[1] + b);
state->h[2] = TRUNC32(state->h[2] + c);
state->h[3] = TRUNC32(state->h[3] + d);
state->h[4] = TRUNC32(state->h[4] + e);
}
return off;
#undef F0
#undef F1
#undef F2
#undef F3
#undef G_
#undef G0
#undef G1
#undef G2
#undef G3
}
#ifdef HAVE_X86_SHA_INTRINSICS
static size_t
process_x86_sha(struct libsha1_state *restrict state, const unsigned char *restrict data, size_t len)
{
const __m128i SHUFFLE_MASK = _mm_set_epi64x(0x0001020304050607ULL, 0x08090A0B0C0D0E0FULL);
register __m128i abcd, e000, temp, msg0, msg1, msg2, msg3;
__m128i abcd_orig, e000_orig;
size_t off = 0;
abcd_orig = _mm_shuffle_epi32(_mm_loadu_si128((const __m128i *)&state->h[0]), 32 - 5);
e000_orig = _mm_set_epi32((int)state->h[4], 0, 0, 0);
for (; len >= off + sizeof(state->chunk); off += sizeof(state->chunk), data = &data[sizeof(state->chunk)]) {
msg0 = _mm_loadu_si128((const __m128i *)&data[0]);
msg0 = _mm_shuffle_epi8(msg0, SHUFFLE_MASK);
e000 = _mm_add_epi32(e000_orig, msg0);
temp = abcd_orig;
abcd = _mm_sha1rnds4_epu32(abcd_orig, e000, 0);
msg1 = _mm_loadu_si128((const __m128i *)&data[16]);
msg1 = _mm_shuffle_epi8(msg1, SHUFFLE_MASK);
temp = _mm_sha1nexte_epu32(temp, msg1);
e000 = abcd;
abcd = _mm_sha1rnds4_epu32(abcd, temp, 0);
msg0 = _mm_sha1msg1_epu32(msg0, msg1);
msg2 = _mm_loadu_si128((const __m128i *)&data[32]);
msg2 = _mm_shuffle_epi8(msg2, SHUFFLE_MASK);
e000 = _mm_sha1nexte_epu32(e000, msg2);
temp = abcd;
abcd = _mm_sha1rnds4_epu32(abcd, e000, 0);
msg1 = _mm_sha1msg1_epu32(msg1, msg2);
msg0 = _mm_xor_si128(msg0, msg2);
msg3 = _mm_loadu_si128((const __m128i *)&data[48]);
msg3 = _mm_shuffle_epi8(msg3, SHUFFLE_MASK);
temp = _mm_sha1nexte_epu32(temp, msg3);
e000 = abcd;
msg0 = _mm_sha1msg2_epu32(msg0, msg3);
abcd = _mm_sha1rnds4_epu32(abcd, temp, 0);
msg2 = _mm_sha1msg1_epu32(msg2, msg3);
msg1 = _mm_xor_si128(msg1, msg3);
e000 = _mm_sha1nexte_epu32(e000, msg0);
temp = abcd;
msg1 = _mm_sha1msg2_epu32(msg1, msg0);
abcd = _mm_sha1rnds4_epu32(abcd, e000, 0);
msg3 = _mm_sha1msg1_epu32(msg3, msg0);
msg2 = _mm_xor_si128(msg2, msg0);
temp = _mm_sha1nexte_epu32(temp, msg1);
e000 = abcd;
msg2 = _mm_sha1msg2_epu32(msg2, msg1);
abcd = _mm_sha1rnds4_epu32(abcd, temp, 1);
msg0 = _mm_sha1msg1_epu32(msg0, msg1);
msg3 = _mm_xor_si128(msg3, msg1);
e000 = _mm_sha1nexte_epu32(e000, msg2);
temp = abcd;
msg3 = _mm_sha1msg2_epu32(msg3, msg2);
abcd = _mm_sha1rnds4_epu32(abcd, e000, 1);
msg1 = _mm_sha1msg1_epu32(msg1, msg2);
msg0 = _mm_xor_si128(msg0, msg2);
temp = _mm_sha1nexte_epu32(temp, msg3);
e000 = abcd;
msg0 = _mm_sha1msg2_epu32(msg0, msg3);
abcd = _mm_sha1rnds4_epu32(abcd, temp, 1);
msg2 = _mm_sha1msg1_epu32(msg2, msg3);
msg1 = _mm_xor_si128(msg1, msg3);
e000 = _mm_sha1nexte_epu32(e000, msg0);
temp = abcd;
msg1 = _mm_sha1msg2_epu32(msg1, msg0);
abcd = _mm_sha1rnds4_epu32(abcd, e000, 1);
msg3 = _mm_sha1msg1_epu32(msg3, msg0);
msg2 = _mm_xor_si128(msg2, msg0);
temp = _mm_sha1nexte_epu32(temp, msg1);
e000 = abcd;
msg2 = _mm_sha1msg2_epu32(msg2, msg1);
abcd = _mm_sha1rnds4_epu32(abcd, temp, 1);
msg0 = _mm_sha1msg1_epu32(msg0, msg1);
msg3 = _mm_xor_si128(msg3, msg1);
e000 = _mm_sha1nexte_epu32(e000, msg2);
temp = abcd;
msg3 = _mm_sha1msg2_epu32(msg3, msg2);
abcd = _mm_sha1rnds4_epu32(abcd, e000, 2);
msg1 = _mm_sha1msg1_epu32(msg1, msg2);
msg0 = _mm_xor_si128(msg0, msg2);
temp = _mm_sha1nexte_epu32(temp, msg3);
e000 = abcd;
msg0 = _mm_sha1msg2_epu32(msg0, msg3);
abcd = _mm_sha1rnds4_epu32(abcd, temp, 2);
msg2 = _mm_sha1msg1_epu32(msg2, msg3);
msg1 = _mm_xor_si128(msg1, msg3);
e000 = _mm_sha1nexte_epu32(e000, msg0);
temp = abcd;
msg1 = _mm_sha1msg2_epu32(msg1, msg0);
abcd = _mm_sha1rnds4_epu32(abcd, e000, 2);
msg3 = _mm_sha1msg1_epu32(msg3, msg0);
msg2 = _mm_xor_si128(msg2, msg0);
temp = _mm_sha1nexte_epu32(temp, msg1);
e000 = abcd;
msg2 = _mm_sha1msg2_epu32(msg2, msg1);
abcd = _mm_sha1rnds4_epu32(abcd, temp, 2);
msg0 = _mm_sha1msg1_epu32(msg0, msg1);
msg3 = _mm_xor_si128(msg3, msg1);
e000 = _mm_sha1nexte_epu32(e000, msg2);
temp = abcd;
msg3 = _mm_sha1msg2_epu32(msg3, msg2);
abcd = _mm_sha1rnds4_epu32(abcd, e000, 2);
msg1 = _mm_sha1msg1_epu32(msg1, msg2);
msg0 = _mm_xor_si128(msg0, msg2);
temp = _mm_sha1nexte_epu32(temp, msg3);
e000 = abcd;
msg0 = _mm_sha1msg2_epu32(msg0, msg3);
abcd = _mm_sha1rnds4_epu32(abcd, temp, 3);
msg2 = _mm_sha1msg1_epu32(msg2, msg3);
msg1 = _mm_xor_si128(msg1, msg3);
e000 = _mm_sha1nexte_epu32(e000, msg0);
temp = abcd;
msg1 = _mm_sha1msg2_epu32(msg1, msg0);
abcd = _mm_sha1rnds4_epu32(abcd, e000, 3);
msg3 = _mm_sha1msg1_epu32(msg3, msg0);
msg2 = _mm_xor_si128(msg2, msg0);
temp = _mm_sha1nexte_epu32(temp, msg1);
e000 = abcd;
msg2 = _mm_sha1msg2_epu32(msg2, msg1);
abcd = _mm_sha1rnds4_epu32(abcd, temp, 3);
msg3 = _mm_xor_si128(msg3, msg1);
e000 = _mm_sha1nexte_epu32(e000, msg2);
temp = abcd;
msg3 = _mm_sha1msg2_epu32(msg3, msg2);
abcd = _mm_sha1rnds4_epu32(abcd, e000, 3);
temp = _mm_sha1nexte_epu32(temp, msg3);
e000 = abcd;
abcd = _mm_sha1rnds4_epu32(abcd, temp, 3);
e000_orig = _mm_sha1nexte_epu32(e000, e000_orig);
abcd_orig = _mm_add_epi32(abcd, abcd_orig);
}
_mm_storeu_si128((__m128i *)&state->h[0], _mm_shuffle_epi32(abcd_orig, 32 - 5));
state->h[4] = (uint_least32_t)_mm_extract_epi32(e000_orig, 3);
return off;
}
# if defined(__GNUC__)
__attribute__((__constructor__))
# endif
static int
have_sha_intrinsics(void)
{
static volatile int ret = -1;
static volatile atomic_flag spinlock = ATOMIC_FLAG_INIT;
int a, b, c, d;
if (ret != -1)
return ret;
while (atomic_flag_test_and_set(&spinlock));
if (ret != -1)
goto out;
a = 7;
c = 0;
__asm__ volatile("cpuid" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "a"(a), "c"(c));
if (!(b & (1 << 29))) {
ret = 0;
goto out;
}
a = 1;
__asm__ volatile("cpuid" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "a"(a), "c"(c));
if (!(c & (1 << 19)) || !(c & (1 << 0)) || !(d & (1 << 26))) {
ret = 0;
goto out;
}
ret = 1;
out:
atomic_flag_clear(&spinlock);
return ret;
}
#endif
size_t
libsha1_process(struct libsha1_state *restrict state, const unsigned char *restrict data, size_t len)
{
#ifdef HAVE_X86_SHA_INTRINSICS
if (state->algorithm == LIBSHA1_1 && have_sha_intrinsics())
return process_x86_sha(state, data, len);
#endif
return process_portable(state, data, len);
}
|
