-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathsbox.go
193 lines (186 loc) · 6.29 KB
/
sbox.go
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
package main
import "encoding/binary"
func make_decryption_state(theBytes []byte) STATE {
out := STATE{}
j := 0
for row := 0; row < 4; row++ {
for col := 0; col < 4; col++ {
out[col][row] = theBytes[j]
j++
}
}
return out
}
func initializeState(theBytes []byte) STATE {
out := [4][4]byte{}
j := 0
for row := 0; row < 4; row++ {
for col := 0; col < 4; col++ {
out[col][row] = theBytes[j]
j++
}
}
return out
}
func make_key_matrix(words []uint32) [4][4]byte {
out := [4][4]byte{}
for row := 0; row < 4; row++ {
for col := 0; col < 4; col++ {
word := words[row]
ishift := 24 - col*8
theByte := byte((word & (0xff << ishift)) >> ishift)
out[col][row] = theByte
}
}
return out
}
//Stallings book on cryptography and network security
func g_aes(word uint32, j int) uint32 {
var round_constant = map[int]uint32{
0: 0x00000,
1: 0x1000000,
2: 0x2000000,
3: 0x4000000,
4: 0x8000000,
5: 0x10000000,
6: 0x20000000,
7: 0x40000000,
8: 0x80000000,
9: 0x1b000000,
10: 0x36000000,
}
word2 := rotWord(word)
myBytes := make([]byte,4)
binary.BigEndian.PutUint32(myBytes,word2)
ba := sub_bytes(myBytes)
word2 = binary.BigEndian.Uint32(ba)
return (word2 ^ round_constant[j])
}
func get_inv_sbox() [16][16]byte {
box := [256]byte{
0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d}
box2 := [16][16]byte{}
for col := 0; col < 16; col++ {
for row := 0; row < 16; row++ {
box2[row][col] = box[row*16+col]
}
}
return box2
}
func get_key_schedule(key []byte) [44]uint32 {
var round_constant = map[int]uint32{
0: 0x00000,
1: 0x1000000,
2: 0x2000000,
3: 0x4000000,
4: 0x8000000,
5: 0x10000000,
6: 0x20000000,
7: 0x40000000,
8: 0x80000000,
9: 0x1b000000,
10: 0x36000000,
}
words := [44]uint32{}
for i := 0; i < 4; i++ {
words[i] = binary.BigEndian.Uint32(key[4*i : 4*i+4])
}
for i := 1; i < 11; i++ {
word2 := rotWord(words[4*i-1])
myBytes := make([]byte,4)
binary.BigEndian.PutUint32(myBytes, word2)
ba := sub_bytes(myBytes)
word2 = binary.BigEndian.Uint32(ba)
g := word2^round_constant[i]
words[4*i] = words[4*i-4] ^ g
words[4*i+1] = words[4*i-3] ^ words[4*i]
words[4*i+2] = words[4*i-2] ^ words[4*i+1]
words[4*i+3] = words[4*i-1] ^ words[4*i+2]
}
retval := [44]uint32{}
for i := 0; i < 44; i++ {
retval[i] = words[i]
}
return retval
}
//Multiplication in a Galois field or order 256
func galois_multiply(a byte, b byte) byte {
p := byte(0)
for counter := 0; counter < 8; counter++ {
if (b & 1) != 0 {
p ^= a
}
hi_bit_set := (a & 0x80) != 0
a <<= 1
if hi_bit_set {
a ^= 0x1B // x^8 + x^4 + x^3 + x + 1 */
}
b >>= 1
}
return p
}
func unpackState(matrix STATE) [16]byte {
out := [16]byte{}
j := 0
for row := 0; row < 4; row++ {
for col := 0; col < 4; col++ {
out[j] = matrix[col][row]
j++
}
}
return out
}
func rotWord(word uint32) uint32 {
ba:=make([]byte,4)
binary.BigEndian.PutUint32(ba,word)
// ba := wordToBytes(word)
b0 := ba[0]
var ba2 [4]byte
ba2 = [4]byte{}
for i := 0; i < 3; i++ {
ba2[i] = ba[i+1]
}
ba2[3] = b0
return binary.BigEndian.Uint32(ba2[:])
}
func get_sbox() [16][16]byte {
box := [256]byte{
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16}
box2 := [16][16]byte{}
for col := 0; col < 16; col++ {
for row := 0; row < 16; row++ {
box2[row][col] = box[row*16+col]
}
}
return box2
}