TQ1amT5x

1package com.cottonlesergal.serialization;
2
3import javax.crypto.BadPaddingException;
4import javax.crypto.Cipher;
5import javax.crypto.IllegalBlockSizeException;
6import javax.crypto.NoSuchPaddingException;
7import javax.crypto.spec.SecretKeySpec;
8import java.io.*;
9import java.security.InvalidKeyException;
10import java.security.Key;
11import java.security.NoSuchAlgorithmException;
12
13public class FileEnDe implements java.io.Serializable{
14    private static final String ALGORITHM = "AES";
15    private static final String TRANSFORMATION = "AES";
16
17
18    private File file;
19
20    String key = "Mary has one cat";
21
22    public FileEnDe(File fileToEnDe){
23        file = fileToEnDe;
24    }
25
26    public static void encrypt(String key, File inputFile, File outputFile){
27        doCrypto(Cipher.ENCRYPT_MODE, key, inputFile, outputFile);
28    }
29
30    public static void decrypt(String key, File inputFile, File outputFile){
31        doCrypto(Cipher.DECRYPT_MODE, key, inputFile, outputFile);
32    }
33
34    private static void doCrypto(int cipherMode, String key, File inputFile,
35                                 File outputFile){
36        try {
37            Key secretKey = new SecretKeySpec(key.getBytes(), ALGORITHM);
38            Cipher cipher = Cipher.getInstance(TRANSFORMATION);
39            cipher.init(cipherMode, secretKey);
40
41            FileInputStream inputStream = new FileInputStream(inputFile);
42            byte[] inputBytes = new byte[(int) inputFile.length()];
43            inputStream.read(inputBytes);
44
45            byte[] outputBytes = cipher.doFinal(inputBytes);
46
47            FileOutputStream outputStream = new FileOutputStream(outputFile);
48            outputStream.write(outputBytes);
49
50            inputStream.close();
51            outputStream.close();
52
53        } catch (NoSuchPaddingException | NoSuchAlgorithmException
54                | InvalidKeyException | BadPaddingException
55                | IllegalBlockSizeException | IOException e) {
56            e.printStackTrace();
57        }
58    }
59
60    public void encryptFile(){
61        File inputFile = new File(file.getAbsolutePath());
62
63        try {
64            BufferedReader br = new BufferedReader(new FileReader(inputFile));
65            String st;
66            while ((st = br.readLine()) != null)
67                System.out.println(st);
68
69            encrypt(key, inputFile, inputFile);
70
71            BufferedReader br2 = new BufferedReader(new FileReader(inputFile));
72            String str;
73            while ((str = br2.readLine()) != null)
74                System.out.println(str);
75
76        } catch (Exception e) {
77            System.out.println(e.getMessage());
78            e.printStackTrace();
79        }
80    }
81
82    public void decryptFile(){
83        File encryptedFile = new File(file.getAbsolutePath());
84
85        try {BufferedReader br = new BufferedReader(new FileReader(encryptedFile));
86            String st;
87            while ((st = br.readLine()) != null)
88                System.out.println(st);
89
90            decrypt(key, encryptedFile, encryptedFile);
91
92            BufferedReader br2 = new BufferedReader(new FileReader(encryptedFile));
93            String str;
94            while ((str = br2.readLine()) != null)
95                System.out.println(str);
96
97        } catch (Exception e) {
98            System.out.println(e.getMessage());
99            e.printStackTrace();
100        }
101    }
102}