7ETBBJER

1import android.os.Environment;
2import org.junit.Test;
3import java.io.File;
4import java.io.FileInputStream;
5import java.io.FileOutputStream;
6import java.io.IOException;
7import java.security.InvalidAlgorithmParameterException;
8import java.security.InvalidKeyException;
9import java.security.Key;
10import java.security.NoSuchAlgorithmException;
11
12import javax.crypto.BadPaddingException;
13import javax.crypto.Cipher;
14import javax.crypto.IllegalBlockSizeException;
15import javax.crypto.NoSuchPaddingException;
16import javax.crypto.spec.IvParameterSpec;
17import javax.crypto.spec.SecretKeySpec;
18
19public class CryptoUtilsTest {
20
21
22    private static void doCryptoInAES(int cipherMode, String key, File inputFile,
23                                 File outputFile) throws CryptoException {
24        try {
25            Key secretKey = new SecretKeySpec(key.getBytes(), "AES");
26            Cipher cipher = Cipher.getInstance("AES");
27            cipher.init(cipherMode, secretKey);
28
29            FileInputStream inputStream = new FileInputStream(inputFile);
30            byte[] inputBytes = new byte[(int) inputFile.length()];
31            inputStream.read(inputBytes);
32
33            byte[] outputBytes = cipher.doFinal(inputBytes);
34
35            FileOutputStream outputStream = new FileOutputStream(outputFile);
36            outputStream.write(outputBytes);
37
38            inputStream.close();
39            outputStream.close();
40
41        } catch (NoSuchPaddingException | NoSuchAlgorithmException
42                | InvalidKeyException | BadPaddingException
43                | IllegalBlockSizeException | IOException ex) {
44            throw new CryptoException("Error encrypting/decrypting file", ex);
45        }
46    }
47
48    private static void doCryptoInBlowFish(int cipherMode,String KEY,File inputFile,File outputFile) throws CryptoException{
49        String ALGORITHM = "Blowfish";
50        String MODE = "Blowfish/CBC/PKCS5Padding";
51        String IV = "!a3edr45";
52
53        try {
54            Key secretKey = new SecretKeySpec(KEY.getBytes(), ALGORITHM);
55            Cipher cipher = Cipher.getInstance(MODE);
56            cipher.init(cipherMode, secretKey, new IvParameterSpec(IV.getBytes()));
57
58            FileInputStream inputStream = new FileInputStream(inputFile);
59            byte[] inputBytes = new byte[(int) inputFile.length()];
60            inputStream.read(inputBytes);
61
62            byte[] outputBytes = cipher.doFinal(inputBytes);
63
64            FileOutputStream outputStream = new FileOutputStream(outputFile);
65            outputStream.write(outputBytes);
66
67            inputStream.close();
68            outputStream.close();
69
70        } catch (NoSuchPaddingException | NoSuchAlgorithmException
71                | InvalidKeyException | BadPaddingException
72                | IllegalBlockSizeException | IOException ex) {
73            ex.fillInStackTrace();
74        } catch (InvalidAlgorithmParameterException e) {
75            e.printStackTrace();
76        }
77    }
78    @Test
79    public void encryptFileinAES() throws CryptoException {
80        final File saveFile = new File(Environment.getExternalStorageDirectory(), "intruder.jpg");
81        doCryptoInAES(Cipher.ENCRYPT_MODE,"ak$#54%^RtF%g^Hf",saveFile,saveFile);
82        doCryptoInAES(Cipher.DECRYPT_MODE,"ak$#54%^RtF%g^Hf",saveFile,saveFile);
83    }
84    @Test
85    public void encryptFileinBlowfish() throws CryptoException {
86        final File saveFile = new File(Environment.getExternalStorageDirectory(), "intruder.jpg");
87        doCryptoInBlowFish(Cipher.ENCRYPT_MODE,"SAMPLEKEY",saveFile,saveFile);
88        doCryptoInBlowFish(Cipher.DECRYPT_MODE,"SAMPLEKEY",saveFile,saveFile);
89    }
90}