Created
June 10, 2013 00:59
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| 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 | |
| } | |
| } | |
| } |
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