Lekhf88v

1package apk;
2
3import java.io.FileInputStream;
4import java.io.FileNotFoundException;
5import java.io.FileOutputStream;
6import java.io.IOException;
7import java.io.InputStream;
8import java.io.ObjectInputStream;
9import java.io.ObjectOutputStream;
10import java.io.OutputStream;
11import java.security.GeneralSecurityException;
12import java.security.Key;
13import java.security.NoSuchAlgorithmException;
14import java.security.SecureRandom;
15
16import javax.crypto.Cipher;
17import javax.crypto.KeyGenerator;
18import javax.crypto.SecretKey;
19
20import aes.Util;
21
22public class AES {
23	
24	public void generateKey() throws IOException, NoSuchAlgorithmException{
25		KeyGenerator keygen = KeyGenerator.getInstance("AES");
26        SecureRandom random = new SecureRandom();
27        keygen.init(random);
28        SecretKey key = keygen.generateKey();
29        try (ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("key_file")))
30        {
31           out.writeObject(key);
32        }
33	}
34
35	public synchronized void encryptFile() throws FileNotFoundException, IOException, ClassNotFoundException, GeneralSecurityException{
36		int mode = Cipher.ENCRYPT_MODE;
37
38        try (ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream("key_file"));
39           InputStream in = new FileInputStream("input2.txt");
40           OutputStream out = new FileOutputStream("encrypted_file.txt");)
41        {
42           Key key = (Key) keyIn.readObject();
43           Cipher cipher = Cipher.getInstance("AES");
44           cipher.init(mode, key);
45           Util.crypt(in, out, cipher);
46        }
47	}
48
49	public synchronized void decryptFile() throws FileNotFoundException, IOException, ClassNotFoundException, GeneralSecurityException{
50		int mode = Cipher.DECRYPT_MODE;
51
52        try (ObjectInputStream keyIn = getKey();
53           InputStream in = new FileInputStream("encrypted_file.txt");
54           OutputStream out = new FileOutputStream("decrypted_file.txt"))
55        {
56           Key key = (Key) keyIn.readObject();
57           Cipher cipher = Cipher.getInstance("AES");
58           cipher.init(mode, key);
59           Util.crypt(in, out, cipher);
60        }
61	}
62	
63	public synchronized ObjectInputStream getKey() throws FileNotFoundException, IOException{
64		return new ObjectInputStream(new FileInputStream("key_file"));
65	}
66}
67
68
69-----------------------------
70package apk;
71
72import java.io.IOException;
73import java.security.GeneralSecurityException;
74import java.security.NoSuchAlgorithmException;
75
76public class AEStest {
77
78	public static void main(String[] args) throws NoSuchAlgorithmException, IOException {
79		test1();
80	}	
81		
82	public static void test1(){
83		AES aes = new AES();
84		
85		try {
86			aes.generateKey();
87		} catch (NoSuchAlgorithmException | IOException e1) {
88			e1.printStackTrace();
89		}
90		
91		for (int i = 0; i < 2; i++) {
92			Runnable r = () -> {
93				try {
94						aes.encryptFile();
95				} catch (ClassNotFoundException | IOException | GeneralSecurityException e) {
96					System.out.println(e);
97				}
98			};
99			
100			Runnable rr = () -> {
101				try {
102						aes.decryptFile();
103				} catch (ClassNotFoundException | IOException | GeneralSecurityException e) {
104					System.out.println(e);
105				}
106			};
107			
108			Thread t = new Thread(r);
109			Thread tt = new Thread(rr);
110			
111			t.start();
112			tt.start();
113		}
114	}
115}