p5F7cnim

1package actividad_2;
2import java.security.*;
3import javax.crypto.*;
4import java.util.*;
5
6public class Actividad_2 {
7
8	public static void main(String[] args) {
9		
10		Scanner sc = new Scanner(System.in);
11		System.out.print("Introduce la longitud de la clave: ");
12		
13		int numero;
14		numero = sc.nextInt();
15		generateKey(numero);
16		
17		sc.close();
18	}
19	
20	protected static void generateKey (int numero) {
21		
22		SecretKey llave = null;
23		
24		try {
25			KeyGenerator k = KeyGenerator.getInstance("AES");
26			k.init(numero);
27			llave = k.generateKey();
28			
29			System.out.println(llave);
30			
31			//clave base64
32			String base64 = Base64.getEncoder().encodeToString(llave.getEncoded());
33			
34			System.out.println("Base64 = " + base64);
35			
36			//clave bytes
37			byte[] convByte = llave.getEncoded();
38			String convByte2 = "";
39			
40			for (int i = 0; i < convByte.length; i++) {
41				convByte2 += convByte[i] + " ";
42			}
43			System.out.println("Byte = " + convByte2);
44			
45			//clave bits
46			String convBits = "";
47			for (int i = 0; i < convByte.length; i++) {
48				convBits += Integer.toBinaryString(convByte[i]);
49			}
50			System.out.println("Bits = " + convBits);
51			
52			
53		} catch (NoSuchAlgorithmException e) {
54			
55			e.printStackTrace();
56		}
57	}
58
59}