K0rL8cFn

1private void cipherFile(Path filePath) {
2		try {
3			KeyGenerator kg = KeyGenerator.getInstance("AES");
4			kg.init(128);
5			SecretKey key = kg.generateKey();
6
7			Cipher symC = Cipher.getInstance("AES");
8			symC.init(Cipher.ENCRYPT_MODE, key);
9
10			FileInputStream fich = new FileInputStream(new File(filePath.toString()));
11			FileOutputStream cifFile = new FileOutputStream(filePath+".cif");
12			CipherOutputStream cos = new CipherOutputStream(cifFile, symC);
13			byte[] b = new byte[16];
14			int i = fich.read(b);
15			while(i != -1){
16				cos.write(b, 0, i);
17				i = fich.read(b);
18			}
19
20			cos.close();
21			fich.close();
22			
23			Cipher asymC = Cipher.getInstance("RSA");
24			asymC.init(Cipher.WRAP_MODE, pubKey);
25			
26			ObjectOutputStream keyOut = new ObjectOutputStream(new FileOutputStream(filePath+".key"));
27			byte[] wrappedKey = asymC.wrap(key);
28			keyOut.writeObject(wrappedKey);
29
30			keyOut.close();
31
32			Files.delete(filePath);
33
34		} catch (Exception e) {
35			e.printStackTrace();
36		}
37
38	}
39
40	private void decipherFile(Path filePath) {
41		try {
42            ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(filePath+".key"));
43            byte[] wrappedKey = (byte[]) keyIn.readObject();
44			
45			Cipher c = Cipher.getInstance("RSA");
46			c.init(Cipher.UNWRAP_MODE, priKey);
47			//Faz o unwrap da chave simetrica
48			Key unwrappedKey = c.unwrap(wrappedKey, "RSA", Cipher.SECRET_KEY);
49			
50			c = Cipher.getInstance("AES");
51			c.init(Cipher.DECRYPT_MODE, unwrappedKey);
52			
53			File newFile = new File(filePath.toString());
54            newFile.createNewFile();
55            FileOutputStream fos = new FileOutputStream(newFile, true);
56			
57			FileInputStream cifFile = new FileInputStream(filePath+".cif");
58			CipherOutputStream cos = new CipherOutputStream(fos, c);
59			byte[] b = new byte[16];
60			int i = cifFile.read(b);
61			while(i != -1){
62				cos.write(b, 0, i);
63			}
64			
65			keyIn.close();
66			cos.close();
67			cifFile.close();
68			fos.close();
69		} catch (Exception e) {
70			// TODO Auto-generated catch block
71			e.printStackTrace();
72		}
73
74	}