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23e3fea5 1
2#include "aes.h"
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8
9
10// The lookup-tables are marked const so they can be placed in read-only storage instead of RAM
11// The numbers below can be computed dynamically trading ROM for RAM -
12// This can be useful in (embedded) bootloader applications, where ROM is often limited.
13static const uint8_t sbox[256] = {
14 //0 1 2 3 4 5 6 7 8 9 A B C D E F
15 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
16 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
17 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
18 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
19 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
20 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
21 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
22 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
23 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
24 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
25 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
26 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
27 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
28 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
29 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
30 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 };
31
32#define getSBoxValue(num) (sbox[(num)])
33
34
35extern __m512i aes2(__m512i s,__m512i key)
36{
37 alignas(64) uint8_t state[4][4][4];
38 _mm512_store_epi32(state[0][0],s);
39 alignas(64) uint8_t a[4][4][4];
40
41 const uint8_t U8_INV_FISRT_BIT_MASK[64] = {[0 ... 63] = 0xFE };//mask2
afb82921 42 const uint32_t COEFF[16] = {[0 ... 15] = 0x1b };//mul
23e3fea5 43 const uint8_t U8_FISRT_BIT_MASK[64] = {[0 ... 63] = 0x01 };//mask
44 const uint32_t U32_FISRT_BYTE_MASK[16] = {[0 ... 15] = 0x000000FF };//mask3
45 const uint32_t left1[16] = {0x00,0x18,0x10,0x08,0x00,0x18,0x10,0x08,0x00,0x18,0x10,0x08,0x00,0x18,0x10,0x08};//left
46 const uint32_t right1[16] = {0x00,0x08,0x10,0x18,0x00,0x08,0x10,0x18,0x00,0x08,0x10,0x18,0x00,0x08,0x10,0x18};//right
47 __m512i mask2 = _mm512_load_epi32 (U8_INV_FISRT_BIT_MASK);
48 __m512i mul = _mm512_load_epi32 (COEFF);
49 __m512i mask = _mm512_load_epi32 (U8_FISRT_BIT_MASK);
50 __m512i mask3 = _mm512_load_epi32 (U32_FISRT_BYTE_MASK);
51 __m512i left = _mm512_load_epi32 (left1);
52 __m512i right = _mm512_load_epi32 (right1);
53
54
55 for (uint8_t t = 0; t < 4; ++t)
56 for (uint8_t i = 0; i < 4; ++i)
57 for (uint8_t j = 0; j < 4; ++j)
58 a[t][i][j] = getSBoxValue(state[t][j][i]); // substitute and swap columbs and rows
59
60
61 __m512i in1 = _mm512_load_epi32 (a[0][0]);
62 __m512i mix_left = _mm512_sllv_epi32(in1,left);
63 __m512i mix_right = _mm512_srlv_epi32(in1,right);
64 __m512i rotated = _mm512_or_si512(mix_right,mix_left);
65 _mm512_store_epi32(a[0][0],rotated);
66
67
68 for (uint8_t t = 0; t < 4; ++t)
69 for(int x = 0; x < 4;x++)
70 for(int y = 0; y < 4;y++)
71 state[t][y][x] = a[t][x][y]; // unswap colimbs and rows
72
73
74 __m512i in = _mm512_load_epi32 (state[0][0]);
75 __m512i in_shiftR_8 = _mm512_srli_epi32(in,8);
76 __m512i xor2 = _mm512_xor_si512(in_shiftR_8,in);
77 __m512i in_shiftR_16 = _mm512_srli_epi32(in,16);
78 __m512i xor1 = _mm512_xor_si512(in_shiftR_16,xor2);
79 __m512i in_shiftR_24 = _mm512_srli_epi32(in,24);
80 __m512i xor = _mm512_xor_si512(xor1,in_shiftR_24);
81
82 __m512i xor_byte = _mm512_and_si512(xor,mask3); // make byte
83 __m512i xor_byte_coeff = _mm512_mullo_epi32(xor_byte,mask);
84
85 __m512i in_shiftL_24 = _mm512_slli_epi32(in,24);
86 __m512i in_rotL_8 = _mm512_or_si512(in_shiftR_8,in_shiftL_24);
87
88 __m512i Tm = _mm512_xor_si512(in_rotL_8,in);
89
90
91
92 __m512i in_shiftR_7 = _mm512_srli_epi32(Tm,7);
93 __m512i in_shiftR_7_BYTE = _mm512_and_si512(in_shiftR_7,mask);
afb82921 94 __m512i mul_1b = _mm512_mullo_epi32(in_shiftR_7_BYTE,mul);
23e3fea5 95
96 __m512i in_shiftL_1 = _mm512_slli_epi32(Tm,1);
97 __m512i in_shiftL_1_BYTE = _mm512_and_si512(in_shiftL_1,mask2);
98
99 __m512i xtime = _mm512_xor_si512(mul_1b,in_shiftL_1_BYTE);
100 __m512i tmp = _mm512_xor_si512(xor_byte_coeff,xtime);
101 __m512i matrix_multiply = _mm512_xor_si512(tmp,in);
102 return _mm512_xor_si512(key,matrix_multiply);
103}
104
105
106
107extern void aes(_512_state* state,_512_key *k)
108{
109 __m512i key = _mm512_load_epi32 (k);
110 alignas(64) uint8_t a[4][4][4];
111
112 const uint8_t U8_INV_FISRT_BIT_MASK[64] = {[0 ... 63] = 0xFE };//mask2
afb82921 113 const uint32_t COEFF[16] = {[0 ... 15] = 0x1b };//mul
23e3fea5 114 const uint8_t U8_FISRT_BIT_MASK[64] = {[0 ... 63] = 0x01 };//mask
115 const uint32_t U32_FISRT_BYTE_MASK[16] = {[0 ... 15] = 0x000000FF };//mask3
116 const uint32_t left1[16] = {0x00,0x18,0x10,0x08,0x00,0x18,0x10,0x08,0x00,0x18,0x10,0x08,0x00,0x18,0x10,0x08};//left
117 const uint32_t right1[16] = {0x00,0x08,0x10,0x18,0x00,0x08,0x10,0x18,0x00,0x08,0x10,0x18,0x00,0x08,0x10,0x18};//right
118 __m512i mask2 = _mm512_load_epi32 (U8_INV_FISRT_BIT_MASK);
119 __m512i mul = _mm512_load_epi32 (COEFF);
120 __m512i mask = _mm512_load_epi32 (U8_FISRT_BIT_MASK);
121 __m512i mask3 = _mm512_load_epi32 (U32_FISRT_BYTE_MASK);
122 __m512i left = _mm512_load_epi32 (left1);
123 __m512i right = _mm512_load_epi32 (right1);
124
125
126 for (uint8_t t = 0; t < 4; ++t)
127 for (uint8_t i = 0; i < 4; ++i)
128 for (uint8_t j = 0; j < 4; ++j)
129 a[t][i][j] = getSBoxValue((*state)[t][j][i]); // substitute and swap columbs and rows
130
131
132 __m512i in1 = _mm512_load_epi32 (a[0][0]);
133 __m512i mix_left = _mm512_sllv_epi32(in1,left);
134 __m512i mix_right = _mm512_srlv_epi32(in1,right);
135 __m512i rotated = _mm512_or_si512(mix_right,mix_left);
136 _mm512_store_epi32(a[0][0],rotated);
137
138
139 for (uint8_t t = 0; t < 4; ++t)
140 for(int x = 0; x < 4;x++)
141 for(int y = 0; y < 4;y++)
142 (*state)[t][y][x] = a[t][x][y]; // unswap colimbs and rows
143
144
145 __m512i in = _mm512_load_epi32 ((*state)[0][0]);
146 __m512i in_shiftR_8 = _mm512_srli_epi32(in,8);
147 __m512i xor2 = _mm512_xor_si512(in_shiftR_8,in);
148 __m512i in_shiftR_16 = _mm512_srli_epi32(in,16);
149 __m512i xor1 = _mm512_xor_si512(in_shiftR_16,xor2);
150 __m512i in_shiftR_24 = _mm512_srli_epi32(in,24);
151 __m512i xor = _mm512_xor_si512(xor1,in_shiftR_24);
152
153 __m512i xor_byte = _mm512_and_si512(xor,mask3); // make byte
154 __m512i xor_byte_coeff = _mm512_mullo_epi32(xor_byte,mask);
155
156 __m512i in_shiftL_24 = _mm512_slli_epi32(in,24);
157 __m512i in_rotL_8 = _mm512_or_si512(in_shiftR_8,in_shiftL_24);
158
159 __m512i Tm = _mm512_xor_si512(in_rotL_8,in);
160
161
162
163 __m512i in_shiftR_7 = _mm512_srli_epi32(Tm,7);
164 __m512i in_shiftR_7_BYTE = _mm512_and_si512(in_shiftR_7,mask);
afb82921 165 __m512i mul_1b = _mm512_mullo_epi32(in_shiftR_7_BYTE,mul);
23e3fea5 166
167 __m512i in_shiftL_1 = _mm512_slli_epi32(Tm,1);
168 __m512i in_shiftL_1_BYTE = _mm512_and_si512(in_shiftL_1,mask2);
169
170 __m512i xtime = _mm512_xor_si512(mul_1b,in_shiftL_1_BYTE);
171 __m512i tmp = _mm512_xor_si512(xor_byte_coeff,xtime);
172 __m512i matrix_multiply = _mm512_xor_si512(tmp,in);
173 __m512i ret = _mm512_xor_si512(key,matrix_multiply);
174 _mm512_store_epi32((*state)[0][0],ret);
175}
176
177
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