func main() {
inputfile := "resources/7.txt"
// Read input file
input, err := ioutil.ReadFile(inputfile)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
key := []byte("YELLOW SUBMARINE")
// Decode base64
input = conversion.Base64BytesToBytes(input)
// Decrypt ECB
e, err := blocks.NewAES(key)
if err != nil {
fmt.Println(err)
} else {
plaintext, err := e.DecryptECB(input)
if err != nil {
fmt.Println(err)
} else {
fmt.Println(string(plaintext))
}
}
}
func RandomOracle(input []byte) ([]byte, string, error) {
rand.Seed(time.Now().UnixNano())
pre := make([]byte, rand.Intn(6)+5) // 5 - 10
_, _ = cryptrand.Read(pre)
post := make([]byte, rand.Intn(6)+5) // 5 - 10
_, _ = cryptrand.Read(post)
plaintext := make([]byte, len(pre)+len(post)+len(input))
copy(plaintext, pre)
copy(plaintext[len(pre):], input)
copy(plaintext[len(pre)+len(input):], post)
e, _ := blocks.NewAES(randomAESKey())
if rand.Intn(2) > 0 {
encrypted, err := e.EncryptCBC(plaintext, randomAESKey())
return encrypted, "CBC", err
} else {
encrypted, err := e.EncryptECB(plaintext)
return encrypted, "ECB", err
}
}