sm4_bitslicing_1.go

package main

import "fmt"

var sbox = [256]byte{
	0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05,
	0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
	0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62,
	0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6,
	0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8,
	0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35,
	0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87,
	0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e,
	0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1,
	0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3,
	0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f,
	0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
	0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8,
	0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0,
	0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84,
	0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48,
}

func input(b byte) (g []byte, m []byte) {
	g = make([]byte, 8)
	m = make([]byte, 10)

	b0 := b & 0x1
	b1 := (b >> 1) & 0x1
	b2 := (b >> 2) & 0x1
	b3 := (b >> 3) & 0x1
	b4 := (b >> 4) & 0x1
	b5 := (b >> 5) & 0x1
	b6 := (b >> 6) & 0x1
	b7 := (b >> 7) & 0x1

	t1 := b7 ^ b5
	t2 := (^(b5 ^ b1)) & 0x1
	t3 := (^(b0 ^ t2)) & 0x1
	t4 := b6 ^ b2
	t5 := b3 ^ t3
	t6 := b4 ^ t1
	t7 := b1 ^ t5
	t8 := b1 ^ t4
	t9 := t6 ^ t8
	t10 := t6 ^ t7
	t11 := (^(b3 ^ t1)) & 0x1
	t12 := (^(b6 ^ t9)) & 0x1
	t13 := t4 ^ t10
	t14 := t2 ^ t11
	t15 := t12 ^ t14
	t16 := t3 ^ t12
	t17 := t11 ^ t16

	g[0] = t10
	g[1] = t7
	g[2] = t13
	g[3] = t5
	g[4] = t2
	g[5] = (^b0) & 0x1
	g[6] = t14
	g[7] = t15

	m[0] = t6
	m[1] = t3
	m[2] = t8
	m[3] = t16
	m[4] = t4
	m[5] = t11
	m[6] = b1
	m[7] = t17
	m[8] = t9
	m[9] = t12
	return
}

func top(g []byte) (p []byte) {
	m := make([]byte, 10)
	p = make([]byte, 4)
	m[0] = g[1] ^ g[0]
	m[1] = g[5] ^ g[4]
	m[2] = g[3] ^ g[2] ^ g[1] ^ g[0]
	m[3] = g[7] ^ g[6] ^ g[5] ^ g[4]

	m[4] = g[2] ^ g[0]
	m[5] = g[6] ^ g[4]
	m[6] = g[3] ^ g[1]
	m[7] = g[7] ^ g[5]
	m[8] = g[3] ^ g[2]
	m[9] = g[7] ^ g[6]

	t1 := g[5] & g[1]
	t2 := m[1] & m[0]
	t3 := g[4] & g[0]
	t4 := g[7] & g[3]

	t5 := m[9] & m[8]
	t6 := g[6] | g[2]
	t7 := g[7] | g[3]
	t8 := m[9] | m[8]

	t9 := m[7] | m[6]
	t10 := m[3] & m[2]
	t11 := m[5] & m[4]
	t12 := m[3] | m[2]

	t13 := t1 ^ t2
	t14 := t3 ^ t2
	t15 := t4 ^ t13
	t16 := t5 ^ t14

	t17 := t9 ^ t10
	t18 := t11 ^ t12
	t19 := t6 ^ t15
	t20 := t7 ^ t16

	p[3] = t19 ^ t17
	p[2] = t20 ^ t18
	p[1] = t8 ^ t15
	p[0] = t6 ^ t16

	return
}

func middle(p []byte) (l []byte) {
	l = make([]byte, 4)

	t0 := p[1] & p[2]
	t1 := p[0] & p[3]
	t3 := p[1] & p[3]
	t2 := p[0] & p[2]

	t4 := t0 & t2
	t5 := t1 ^ t3
	t6 := t5 | p[0]
	t7 := p[3] | t2

	t8 := t4 ^ t6
	t9 := t7 ^ t3
	t10 := t0 ^ t9
	t11 := p[2] | t5
	t12 := p[1] | t2

	l[0] = t10
	l[1] = t11 ^ t1
	l[2] = t12 ^ t5
	l[3] = t8

	return
}

func bottom(g, m, l []byte) (e []byte) {
	e = make([]byte, 18)

	k4 := l[3] ^ l[2]
	k3 := l[3] ^ l[1]
	k2 := l[2] ^ l[0]
	k1 := k3 ^ k2
	k0 := l[1] ^ l[0]

	e[0] = m[1] & k0
	e[1] = g[5] & l[1]
	e[2] = g[4] & l[0]
	e[3] = m[7] & k3
	e[4] = m[5] & k2
	e[5] = m[3] & k1
	e[6] = m[9] & k4
	e[7] = g[7] & l[3]
	e[8] = g[6] & l[2]
	e[9] = m[0] & k0
	e[10] = g[1] & l[1]
	e[11] = g[0] & l[0]
	e[12] = m[6] & k3
	e[13] = m[4] & k2
	e[14] = m[2] & k1
	e[15] = m[8] & k4
	e[16] = g[3] & l[3]
	e[17] = g[2] & l[2]

	return
}

func output(e []byte) byte {
	r0 := e[0] ^ e[1]
	r1 := e[2] ^ e[1]
	r2 := e[3] ^ e[4]
	r3 := e[5] ^ e[4]

	r4 := e[6] ^ e[7]
	r5 := e[8] ^ e[7]
	r6 := e[9] ^ e[10]
	r7 := e[11] ^ e[10]

	r8 := e[12] ^ e[13]
	r9 := e[14] ^ e[13]
	r10 := e[15] ^ e[16]
	r11 := e[17] ^ e[16]

	t1 := r9 ^ r7
	t2 := r1 ^ t1
	t3 := r3 ^ t2
	t4 := r5 ^ r3

	t5 := r4 ^ t4
	t6 := r4 ^ r0
	t7 := r11 ^ r7
	t8 := t1 ^ t4

	t9 := t1 ^ t6
	t10 := r2 ^ t5
	t11 := r10 ^ r8
	t12 := (^(t3 ^ t11)) & 0x1

	t13 := t10 ^ t12
	t14 := (^(t3 ^ t7)) & 0x1
	t15 := (^(r10 ^ r6)) & 0x1
	t16 := t6 ^ t14

	return t16 | (t12 << 1) | (t9 << 2) | (t11 << 3) | (t14 << 4) | (t8 << 5) | (t13 << 6) | (t15 << 7)
}

func main() {
	for i := 0; i < 256; i++ {
		g, m := input(byte(i))
		p := top(g)
		l := middle(p)
		e := bottom(g, m, l)
		s := output(e)
		if sbox[i] != s {
			fmt.Printf("not same value for i=%v", i)
			return
		}

	}
	fmt.Println("OK")
}

sm4_bitslicing_2.go

package main

import "fmt"

var sbox = [256]byte{
	0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05,
	0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
	0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62,
	0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6,
	0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8,
	0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35,
	0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87,
	0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e,
	0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1,
	0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3,
	0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f,
	0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
	0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8,
	0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0,
	0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84,
	0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48,
}

func input(b byte) (y []byte) {
	y = make([]byte, 18)

	b0 := (b >> 7) & 0x1
	b1 := (b >> 6) & 0x1
	b2 := (b >> 5) & 0x1
	b3 := (b >> 4) & 0x1
	b4 := (b >> 3) & 0x1
	b5 := (b >> 2) & 0x1
	b6 := (b >> 1) & 0x1
	b7 := (b >> 0) & 0x1

	t1 := b0 ^ b2
	t2 := (^(b2 ^ b6)) & 0x1
	t3 := (^(b7 ^ t2)) & 0x1
	t4 := b1 ^ b5

	t5 := b4 ^ t3
	t6 := b3 ^ t1
	t7 := b6 ^ t5
	t8 := b6 ^ t4

	t9 := t6 ^ t8
	t10 := t6 ^ t7
	t11 := (^(b4 ^ t1)) & 0x1
	t12 := (^(b1 ^ t9)) & 0x1

	t13 := t4 ^ t10
	t14 := t2 ^ t11
	t15 := t12 ^ t14
	t16 := t3 ^ t12

	t17 := t11 ^ t16

	y[0] = t15
	y[1] = t14
	y[2] = (^b7) & 0x1
	y[3] = t2
	y[4] = t5
	y[5] = t13
	y[6] = t7
	y[9] = t9
	y[7] = t10
	y[8] = t12
	y[10] = t17
	y[11] = b6
	y[12] = t11
	y[13] = t4
	y[14] = t16
	y[15] = t8
	y[16] = t3
	y[17] = t6

	return
}

// y[0...7] = g7...g0
// y[8...17] = m9...m0
func top(y []byte) (p []byte) {
	p = make([]byte, 4)

	t1 := ^(y[2] & y[6]) & 0x1
	t2 := ^(y[16] & y[17]) & 0x1
	t3 := ^(y[3] & y[7]) & 0x1
	t4 := ^(y[0] & y[4]) & 0x1

	t5 := ^(y[8] & y[9]) & 0x1
	t6 := ^(y[1] | y[5]) & 0x1
	t7 := ^(y[0] | y[4]) & 0x1
	t8 := ^(y[8] | y[9]) & 0x1

	t9 := ^(y[10] | y[11]) & 0x1
	t10 := ^(y[14] & y[15]) & 0x1
	t11 := ^(y[12] & y[13]) & 0x1
	t12 := ^(y[14] | y[15]) & 0x1

	t13 := t1 ^ t2
	t14 := t3 ^ t2
	t15 := t4 ^ t13
	t16 := t5 ^ t14

	t17 := t9 ^ t10
	t18 := t11 ^ t12
	t19 := t6 ^ t15
	t20 := t7 ^ t16

	p[0] = t19 ^ t17
	p[1] = t20 ^ t18
	p[2] = t8 ^ t15
	p[3] = t6 ^ t16

	return
}

func middle(p []byte) (l []byte) {
	l = make([]byte, 4)

	t1 := ^(p[0] & p[3]) & 0x1 // t21
	t2 := ^(t1 | p[1]) & 0x1   // t22
	t3 := ^(p[1] & p[3]) & 0x1 // t24
	t4 := p[2] ^ t3            // t25
	t5 := ^(p[1] | t4) & 0x1   // ^t26
	t6 := ^(p[2] & t4) & 0x1   // t27
	t7 := ^(p[0] | t4) & 0x1   // ^t28

	t8 := ^(t7 | t2) & 0x1
	t9 := ^(t5 ^ t7) & 0x1
	t10 := ^(t9 ^ p[0]) & 0x1
	t11 := ^(t6 & t8) & 0x1
	t12 := ^(t8 & p[2]) & 0x1
	t13 := ^(p[3] ^ t12) & 0x1
	t14 := ^(t1 & p[1]) & 0x1
	t15 := ^(t9 & t14) & 0x1

	l[0] = t13
	l[1] = t11
	l[2] = t15
	l[3] = t10

	return
}

// y[0...7] = g7...g0
// y[8...17] = m9...m0
func bottom(y, l []byte) (e []byte) {
	e = make([]byte, 18)

	k4 := l[0] ^ l[1]
	k3 := l[0] ^ l[2]
	k2 := l[1] ^ l[3]
	k1 := k2 ^ k3
	k0 := l[2] ^ l[3]

	e[0] = ^(y[5] & l[1]) & 0x1
	e[1] = ^(y[4] & l[0]) & 0x1
	e[2] = ^(y[9] & k4) & 0x1

	e[3] = ^(y[15] & k1) & 0x1
	e[4] = ^(y[13] & k2) & 0x1
	e[5] = ^(y[11] & k3) & 0x1
	e[6] = ^(y[7] & l[3]) & 0x1

	e[7] = ^(y[6] & l[2]) & 0x1
	e[8] = ^(y[17] & k0) & 0x1
	e[9] = ^(y[1] & l[1]) & 0x1
	e[10] = ^(y[0] & l[0]) & 0x1

	e[11] = ^(y[8] & k4) & 0x1
	e[12] = ^(y[14] & k1) & 0x1
	e[13] = ^(y[12] & k2) & 0x1
	e[14] = ^(y[10] & k3) & 0x1

	e[15] = ^(y[3] & l[3]) & 0x1
	e[16] = ^(y[2] & l[2]) & 0x1
	e[17] = ^(y[16] & k0) & 0x1

	return
}

func output(e []byte) byte {
	e11 := e[0] ^ e[1]
	e10 := e[2] ^ e[1]
	e9 := e[3] ^ e[4]
	e8 := e[5] ^ e[4]

	e7 := e[6] ^ e[7]
	e6 := e[8] ^ e[7]
	e5 := e[9] ^ e[10]
	e4 := e[11] ^ e[10]

	e3 := e[12] ^ e[13]
	e2 := e[14] ^ e[13]
	e1 := e[15] ^ e[16]
	e0 := e[17] ^ e[16]

	t1 := e9 ^ e7
	t2 := e1 ^ t1
	t3 := e3 ^ t2
	t4 := e5 ^ e3

	t5 := e4 ^ t4
	t6 := e4 ^ e0
	t7 := e11 ^ e7
	t8 := t1 ^ t4

	t9 := t1 ^ t6
	t10 := e2 ^ t5
	t11 := e10 ^ e8
	t12 := ^(t3 ^ t11) & 0x1

	t13 := t10 ^ t12
	t14 := ^(t3 ^ t7) & 0x1
	t15 := ^(e10 ^ e6) & 0x1
	t16 := t6 ^ t14

	return (t15 << 7) | (t13 << 6) | (t8 << 5) | (t14 << 4) | (t11 << 3) | (t9 << 2) | (t12 << 1) | (t16 << 0)
}

func sbox_bit(in byte) byte {
	y := input(in)
	return output(bottom(y, middle(top(y))))
}

func main() {
	for i := 0; i < 256; i++ {
		if sbox_bit(byte(i)) != sbox[i] {
			fmt.Printf("not same value for i=%v", i)
			return
		}
	}
	fmt.Println("OK")
}

sm4_bitslicing_3.go

package main

import "fmt"

var sbox = [256]byte{
	0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05,
	0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
	0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62,
	0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6,
	0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8,
	0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35,
	0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87,
	0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e,
	0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1,
	0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3,
	0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f,
	0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
	0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8,
	0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0,
	0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84,
	0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48,
}

func input(b byte) (g []byte, m []byte) {
	g = make([]byte, 8)
	m = make([]byte, 10)

	b0 := b & 0x1
	b1 := (b >> 1) & 0x1
	b2 := (b >> 2) & 0x1
	b3 := (b >> 3) & 0x1
	b4 := (b >> 4) & 0x1
	b5 := (b >> 5) & 0x1
	b6 := (b >> 6) & 0x1
	b7 := (b >> 7) & 0x1

	t1 := b7 ^ b5
	t2 := (^(b5 ^ b1)) & 0x1
	t3 := (^(b0 ^ t2)) & 0x1
	t4 := b6 ^ b2
	t5 := b3 ^ t3
	t6 := b4 ^ t1
	t7 := b1 ^ t5
	t8 := b1 ^ t4
	t9 := t6 ^ t8
	t10 := t6 ^ t7
	t11 := (^(b3 ^ t1)) & 0x1
	t12 := (^(b6 ^ t9)) & 0x1
	t13 := t4 ^ t10
	t14 := t2 ^ t11
	t15 := t12 ^ t14
	t16 := t3 ^ t12
	t17 := t11 ^ t16

	g[0] = t10
	g[1] = t7
	g[2] = t13
	g[3] = t5
	g[4] = t2
	g[5] = (^b0) & 0x1
	g[6] = t14
	g[7] = t15

	m[0] = t6
	m[1] = t3
	m[2] = t8
	m[3] = t16
	m[4] = t4
	m[5] = t11
	m[6] = b1
	m[7] = t17
	m[8] = t9
	m[9] = t12
	return
}

func top(g, m []byte) (p []byte) {
	p = make([]byte, 4)

	t1 := ^(g[5] & g[1]) & 0x1
	t2 := ^(m[1] & m[0]) & 0x1
	t3 := ^(g[4] & g[0]) & 0x1
	t4 := ^(g[7] & g[3]) & 0x1

	t5 := ^(m[9] & m[8]) & 0x1
	t6 := ^(g[6] | g[2]) & 0x1
	t7 := ^(g[7] | g[3]) & 0x1
	t8 := ^(m[9] | m[8]) & 0x1

	t9 := ^(m[7] | m[6]) & 0x1
	t10 := ^(m[3] & m[2]) & 0x1
	t11 := ^(m[5] & m[4]) & 0x1
	t12 := ^(m[3] | m[2]) & 0x1

	t13 := t1 ^ t2
	t14 := t3 ^ t2
	t15 := t4 ^ t13
	t16 := t5 ^ t14

	t17 := t9 ^ t10
	t18 := t11 ^ t12
	t19 := t6 ^ t15
	t20 := t7 ^ t16

	p[3] = t19 ^ t17
	p[2] = t20 ^ t18
	p[1] = t8 ^ t15
	p[0] = t6 ^ t16

	return
}

func middle(p []byte) (l []byte) {
	l = make([]byte, 4)

	t1 := ^(p[3] & p[0]) & 0x1
	t2 := ^(t1 | p[2]) & 0x1
	t3 := ^(p[2] & p[0]) & 0x1
	t4 := p[1] ^ t3
	t5 := ^(p[2] | t4) & 0x1
	t6 := ^(p[1] & t4) & 0x1
	t7 := ^(p[3] | t4) & 0x1
	t8 := ^(t7 | t2) & 0x1
	t9 := ^(t5 ^ t7) & 0x1
	t10 := ^(t9 ^ p[3]) & 0x1
	t11 := ^(t6 & t8) & 0x1
	t12 := ^(t8 & p[1]) & 0x1
	t13 := ^(p[0] ^ t12) & 0x1
	t14 := ^(t1 & p[2]) & 0x1
	t15 := ^(t9 & t14) & 0x1

	l[0] = t10
	l[1] = t15
	l[2] = t11
	l[3] = t13

	return
}

func bottom(g, m, l []byte) (e []byte) {
	e = make([]byte, 18)

	k4 := l[3] ^ l[2]
	k3 := l[3] ^ l[1]
	k2 := l[2] ^ l[0]
	k1 := k3 ^ k2
	k0 := l[1] ^ l[0]

	e[0] = ^(m[1] & k0) & 0x1
	e[1] = ^(g[5] & l[1]) & 0x1
	e[2] = ^(g[4] & l[0]) & 0x1
	e[3] = ^(m[7] & k3) & 0x1

	e[4] = ^(m[5] & k2) & 0x1
	e[5] = ^(m[3] & k1) & 0x1
	e[6] = ^(m[9] & k4) & 0x1
	e[7] = ^(g[7] & l[3]) & 0x1

	e[8] = ^(g[6] & l[2]) & 0x1
	e[9] = ^(m[0] & k0) & 0x1
	e[10] = ^(g[1] & l[1]) & 0x1
	e[11] = ^(g[0] & l[0]) & 0x1

	e[12] = ^(m[6] & k3) & 0x1
	e[13] = ^(m[4] & k2) & 0x1
	e[14] = ^(m[2] & k1) & 0x1
	e[15] = ^(m[8] & k4) & 0x1

	e[16] = ^(g[3] & l[3]) & 0x1
	e[17] = ^(g[2] & l[2]) & 0x1

	return
}

func output(e []byte) byte {
	r0 := e[0] ^ e[1]
	r1 := e[2] ^ e[1]
	r2 := e[3] ^ e[4]
	r3 := e[5] ^ e[4]

	r4 := e[6] ^ e[7]
	r5 := e[8] ^ e[7]
	r6 := e[9] ^ e[10]
	r7 := e[11] ^ e[10]

	r8 := e[12] ^ e[13]
	r9 := e[14] ^ e[13]
	r10 := e[15] ^ e[16]
	r11 := e[17] ^ e[16]

	t1 := r9 ^ r7
	t2 := r1 ^ t1
	t3 := r3 ^ t2
	t4 := r5 ^ r3

	t5 := r4 ^ t4
	t6 := r4 ^ r0
	t7 := r11 ^ r7
	t8 := t1 ^ t4

	t9 := t1 ^ t6
	t10 := r2 ^ t5
	t11 := r10 ^ r8
	t12 := ^(t3 ^ t11) & 0x1

	t13 := t10 ^ t12
	t14 := ^(t3 ^ t7) & 0x1
	t15 := ^(r10 ^ r6) & 0x1
	t16 := t6 ^ t14

	return t16 | (t12 << 1) | (t9 << 2) | (t11 << 3) | (t14 << 4) | (t8 << 5) | (t13 << 6) | (t15 << 7)
}

func main() {
	for i := 0; i < 256; i++ {
		g, m := input(byte(i))
		p := top(g, m)
		l := middle(p)
		e := bottom(g, m, l)
		s := output(e)
		if sbox[i] != s {
			fmt.Printf("not same value for i=%v", i)
			return
		}

	}
	fmt.Println("OK")
}