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1 /*
2  * Portable implementation of core functions for GOST R 34.11-2012.
3  *
4  * Copyright (c) 2013 Cryptocom LTD.
5  * This file is distributed under the same license as OpenSSL.
6  *
7  * Author: Alexey Degtyarev <alexey@renatasystems.org>
8  *
9  */
10
11 #ifdef __GOST3411_HAS_SSE2__
12 # error "GOST R 34.11-2012: portable implementation disabled in config.h"
13 #endif
14
15 #define X(x, y, z) { \
16     z->QWORD[0] = x->QWORD[0] ^ y->QWORD[0]; \
17     z->QWORD[1] = x->QWORD[1] ^ y->QWORD[1]; \
18     z->QWORD[2] = x->QWORD[2] ^ y->QWORD[2]; \
19     z->QWORD[3] = x->QWORD[3] ^ y->QWORD[3]; \
20     z->QWORD[4] = x->QWORD[4] ^ y->QWORD[4]; \
21     z->QWORD[5] = x->QWORD[5] ^ y->QWORD[5]; \
22     z->QWORD[6] = x->QWORD[6] ^ y->QWORD[6]; \
23     z->QWORD[7] = x->QWORD[7] ^ y->QWORD[7]; \
24 }
25
26 # define __XLPS_FOR for (_i = 0; _i <= 7; _i++)
27 #ifndef __GOST3411_BIG_ENDIAN__
28 # define _datai _i
29 #else
30 # define _datai 7 - _i
31 #endif
32
33 #define XLPS(x, y, data) { \
34     register unsigned long long r0, r1, r2, r3, r4, r5, r6, r7; \
35     int _i; \
36     \
37     r0 = x->QWORD[0] ^ y->QWORD[0]; \
38     r1 = x->QWORD[1] ^ y->QWORD[1]; \
39     r2 = x->QWORD[2] ^ y->QWORD[2]; \
40     r3 = x->QWORD[3] ^ y->QWORD[3]; \
41     r4 = x->QWORD[4] ^ y->QWORD[4]; \
42     r5 = x->QWORD[5] ^ y->QWORD[5]; \
43     r6 = x->QWORD[6] ^ y->QWORD[6]; \
44     r7 = x->QWORD[7] ^ y->QWORD[7]; \
45     \
46     \
47     __XLPS_FOR {\
48         data->QWORD[_datai]  = Ax[0][r0 & 0xFF]; \
49         data->QWORD[_datai] ^= Ax[1][r1 & 0xFF]; \
50         data->QWORD[_datai] ^= Ax[2][r2 & 0xFF]; \
51         data->QWORD[_datai] ^= Ax[3][r3 & 0xFF]; \
52         data->QWORD[_datai] ^= Ax[4][r4 & 0xFF]; \
53         data->QWORD[_datai] ^= Ax[5][r5 & 0xFF]; \
54         data->QWORD[_datai] ^= Ax[6][r6 & 0xFF]; \
55         data->QWORD[_datai] ^= Ax[7][r7 & 0xFF]; \
56         r0 >>= 8; \
57         r1 >>= 8; \
58         r2 >>= 8; \
59         r3 >>= 8; \
60         r4 >>= 8; \
61         r5 >>= 8; \
62         r6 >>= 8; \
63         r7 >>= 8; \
64     }\
65 }
66
67 #define ROUND(i, Ki, data) { \
68     XLPS(Ki, (&C[i]), Ki); \
69     XLPS(Ki, data, data); \
70 }