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/
aes.go
86 lines (74 loc) · 3.28 KB
/
aes.go
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package aes
var sbox = []uint8{
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}
var tmp [4][4]uint8
func Aes_enc_soft(a, b, roundKey []uint64) []uint64 {
var temp, Tmp, Tm, t uint8
for k := 0; k < 2; k++ {
for i := 0; i < 2; i++ {
for j := 0; j < 4; j++ {
tmp[k*2+i][j] = uint8(b[k] >> uint(i*32+8*j))
}
}
}
// Rotate first row 1 columns to left
temp = tmp[0][1]
tmp[0][1] = tmp[1][1]
tmp[1][1] = tmp[2][1]
tmp[2][1] = tmp[3][1]
tmp[3][1] = temp
// Rotate second row 2 columns to left
temp = tmp[0][2]
tmp[0][2] = tmp[2][2]
tmp[2][2] = temp
temp = tmp[1][2]
tmp[1][2] = tmp[3][2]
tmp[3][2] = temp
// Rotate third row 3 columns to left
temp = tmp[0][3]
tmp[0][3] = tmp[3][3]
tmp[3][3] = tmp[2][3]
tmp[2][3] = tmp[1][3]
tmp[1][3] = temp
for i := 0; i < 4; i++ {
for j := 0; j < 4; j++ {
tmp[j][i] = sbox[tmp[j][i]]
}
}
for i := 0; i < 4; i++ {
t = tmp[i][0]
Tmp = tmp[i][0] ^ tmp[i][1] ^ tmp[i][2] ^ tmp[i][3]
Tm = tmp[i][0] ^ tmp[i][1]
Tm = ((Tm << 1) ^ (((Tm >> 7) & 1) * 0x1b))
tmp[i][0] ^= Tm ^ Tmp
Tm = tmp[i][1] ^ tmp[i][2]
Tm = ((Tm << 1) ^ (((Tm >> 7) & 1) * 0x1b))
tmp[i][1] ^= Tm ^ Tmp
Tm = tmp[i][2] ^ tmp[i][3]
Tm = ((Tm << 1) ^ (((Tm >> 7) & 1) * 0x1b))
tmp[i][2] ^= Tm ^ Tmp
Tm = tmp[i][3] ^ t
Tm = ((Tm << 1) ^ (((Tm >> 7) & 1) * 0x1b))
tmp[i][3] ^= Tm ^ Tmp
}
a[0] = uint64(tmp[0][0]) | (uint64(tmp[0][1]) << 8) | (uint64(tmp[0][2]) << 16) | (uint64(tmp[0][3]) << 24) | (uint64(tmp[1][0]) << 32) | (uint64(tmp[1][1]) << 40) | (uint64(tmp[1][2]) << 48) | (uint64(tmp[1][3]) << 56)
a[1] = uint64(tmp[2][0]) | (uint64(tmp[2][1]) << 8) | (uint64(tmp[2][2]) << 16) | (uint64(tmp[2][3]) << 24) | (uint64(tmp[3][0]) << 32) | (uint64(tmp[3][1]) << 40) | (uint64(tmp[3][2]) << 48) | (uint64(tmp[3][3]) << 56)
a[0] ^= roundKey[0]
a[1] ^= roundKey[1]
return a
}