emRzQepM

1public static void ChipherDecipherAES(String claveString, File origen, File destino, boolean cifrar){
2        try {
3            String tipoEncriptado = "AES";
4            byte[] clave = new byte[16];
5            System.arraycopy(cipherToMD5ShaString(claveString,"MD5"),0,clave,0,16);
6            
7            SecretKey key = new SecretKeySpec(clave, tipoEncriptado);
8            
9            Cipher desCipher = Cipher.getInstance(tipoEncriptado);
10            BufferedInputStream bis = new BufferedInputStream(new FileInputStream(origen));
11            BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(destino));
12            byte mensajeEnBytes[] = new byte[1024];
13            if(cifrar){
14            //Cifrar
15                desCipher.init(Cipher.ENCRYPT_MODE, key);
16                String mensaje = "Mensaje que se va a cifrar";
17                while(true){
18                    int i = bis.read(mensajeEnBytes);
19                    if(i == -1)
20                        break;
21                    byte[] temp = new byte[i];
22                    System.arraycopy(mensajeEnBytes, 0, temp, 0, i);
23                    //System.out.println(i);
24                    //System.out.println(temp.length);
25                    //System.out.println(Arrays.toString(temp));
26                    //System.out.println(Arrays.toString(mensajeEnBytes));
27                    if(i<1024)
28                        bos.write(desCipher.doFinal(temp));
29                    else
30                        bos.write(desCipher.update(temp));
31                }
32                System.out.println("Mensaje cifrado y guardado en "+destino.getAbsolutePath());
33                bos.flush();
34            }else{
35            //desencriptado
36            desCipher.init(Cipher.DECRYPT_MODE, key);
37                while(true){
38                    int i = bis.read(mensajeEnBytes);
39                    if(i == -1)
40                        break;
41                    byte[] temp = new byte[i];
42                    //System.arraycopy(mensajeEnBytes, 0, temp, 0, i);
43                    //System.out.println(i);
44                    //System.out.println(temp.length);
45                    //System.out.println(Arrays.toString(temp));
46                    //System.out.println(Arrays.toString(mensajeEnBytes));
47                    if(i < 1024)
48                        bos.write(desCipher.doFinal(temp));
49                    else
50                        bos.write(desCipher.update(temp));
51                }
52                System.out.println("Descifrado y guardado en " + destino.getAbsolutePath());
53                bos.flush();
54            }
55        } catch (Exception e) {
56            System.out.println(e.toString());
57            System.out.println(Arrays.toString(e.getStackTrace()));
58        }
59    }