package main
import "crypto/aes"import "fmt"import "encoding/hex"
var start = []byte("AES-256 ECB mode twice, two keys")var end = []byte("\x4c\x76\xe9\x07\x86\xc4\xf3\x64\x6a\xdf\x99\x21\x7a\x64\xd0\xd7\x49\xed\xc5\x9f\x2c\x7f\xbb\x36\x58\xaf\x04\xaf\x07\x1d\x0c\x47")
var reverse = make(map[string][32]byte)
func main() {  var keys[1<<24][32]byte  for i := 0; i < 1<<24; i++ {    keys[i][29] = byte(i & 0xff);    keys[i][30] = byte((i >> 8) & 0xff);    keys[i][31] = byte((i >> 16) & 0xff);  }
  for i := 0; i < 1<<24; i++ {    b, _ := aes.NewCipher(keys[i][:])    dest := make([]byte, 16)    b.Encrypt(dest, start[:16])     reverse[hex.EncodeToString(dest)] = keys[i]  }
  fmt.Println("Encoded all the things")
  for i := 0; i < 1<<24; i++ {    b, _ := aes.NewCipher(keys[i][:])    dest := make([]byte, 16)    b.Decrypt(dest, end[:16])    if v, ok := reverse[hex.EncodeToString(dest)]; ok {      fmt.Println(hex.EncodeToString(v[:]))      fmt.Println(hex.EncodeToString(keys[i][:]))      return    }  }}