CKj1Dqwq

1import java.io.FileInputStream;
2import java.io.FileOutputStream;
3import java.io.IOException;
4import java.io.InputStream;
5import java.io.OutputStream;
6import java.security.Key;
7import javax.crypto.Cipher;
8import javax.crypto.CipherInputStream;
9import javax.crypto.CipherOutputStream;
10import javax.crypto.KeyGenerator;
11
12public class Blowfish {
13
14public static void main(String[] args) {
15    try {
16        String key = "squirrel123";
17
18        FileInputStream fis = new FileInputStream("original.txt");
19        FileOutputStream fos = new FileOutputStream("encrypted.txt");
20        encrypt(key, fis, fos);
21
22        FileInputStream fis2 = new FileInputStream("encrypted.txt");
23        FileOutputStream fos2 = new FileOutputStream("decrypted.txt");
24        decrypt(key, fis2, fos2);
25    } catch (Throwable e) {
26        e.printStackTrace();
27    }
28}
29
30public static void encrypt(String key, InputStream is, OutputStream os)
31        throws Throwable {
32    encryptOrDecrypt(key, Cipher.ENCRYPT_MODE, is, os);
33}
34
35public static void decrypt(String key, InputStream is, OutputStream os)
36        throws Throwable {
37    encryptOrDecrypt(key, Cipher.DECRYPT_MODE, is, os);
38}
39
40public static void encryptOrDecrypt(String key, int mode, InputStream is,
41        OutputStream os) throws Throwable {
42
43    KeyGenerator keyGenerator = KeyGenerator.getInstance("Blowfish");
44    keyGenerator.init(128);
45    Key secretKey = keyGenerator.generateKey();
46    Cipher cipher = Cipher.getInstance("Blowfish/CFB/NoPadding");
47
48    if (mode == Cipher.ENCRYPT_MODE) {
49
50        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
51        CipherInputStream cis = new CipherInputStream(is, cipher);
52        doCopy(cis, os);
53    } else if (mode == Cipher.DECRYPT_MODE) {
54
55        cipher.init(Cipher.DECRYPT_MODE, secretKey);
56        CipherOutputStream cos = new CipherOutputStream(os, cipher);
57        doCopy(is, cos);
58    }
59}
60
61public static void doCopy(InputStream is, OutputStream os)
62        throws IOException {
63    byte[] bytes = new byte[64];
64    int numBytes;
65    while ((numBytes = is.read(bytes)) != -1) {
66        os.write(bytes, 0, numBytes);
67    }
68    os.flush();
69    os.close();
70    is.close();
71}