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1package net.merge.dancechallange;
2
3import android.util.Base64;
4
5import java.io.UnsupportedEncodingException;
6import java.security.InvalidKeyException;
7import java.security.NoSuchAlgorithmException;
8import java.security.spec.InvalidKeySpecException;
9
10import javax.crypto.BadPaddingException;
11import javax.crypto.Cipher;
12import javax.crypto.IllegalBlockSizeException;
13import javax.crypto.NoSuchPaddingException;
14import javax.crypto.SecretKey;
15import javax.crypto.SecretKeyFactory;
16import javax.crypto.spec.DESKeySpec;
17
18/**
19 * Created by Noah on 4/24/2018.
20 */
21
22public class managmentApp {
23
24    public static String decryptIt(String value) {
25        try {
26            DESKeySpec keySpec = new DESKeySpec("他媽的你".getBytes("UTF8"));
27            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
28            SecretKey key = keyFactory.generateSecret(keySpec);
29
30            byte[] encrypedPwdBytes = Base64.decode(value, Base64.DEFAULT);
31            // cipher is not thread safe
32            Cipher cipher = Cipher.getInstance("DES");
33            cipher.init(Cipher.DECRYPT_MODE, key);
34            byte[] decrypedValueBytes = (cipher.doFinal(encrypedPwdBytes));
35
36            String decrypedValue = new String(decrypedValueBytes);
37            return decrypedValue;
38
39        } catch (InvalidKeyException e) {
40            e.printStackTrace();
41        } catch (UnsupportedEncodingException e) {
42            e.printStackTrace();
43        } catch (InvalidKeySpecException e) {
44            e.printStackTrace();
45        } catch (NoSuchAlgorithmException e) {
46            e.printStackTrace();
47        } catch (BadPaddingException e) {
48            e.printStackTrace();
49        } catch (NoSuchPaddingException e) {
50            e.printStackTrace();
51        } catch (IllegalBlockSizeException e) {
52            e.printStackTrace();
53        }
54        return value;
55    }
56
57    public static String encryptIt(String value) {
58        try {
59            DESKeySpec keySpec = new DESKeySpec("他媽的你".getBytes("UTF8"));
60            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
61            SecretKey key = keyFactory.generateSecret(keySpec);
62
63            byte[] clearText = value.getBytes("UTF8");
64            // Cipher is not thread safe
65            Cipher cipher = Cipher.getInstance("DES");
66            cipher.init(Cipher.ENCRYPT_MODE, key);
67
68            String encrypedValue = Base64.encodeToString(cipher.doFinal(clearText), Base64.DEFAULT);
69            return encrypedValue;
70
71        } catch (InvalidKeyException e) {
72            e.printStackTrace();
73        } catch (UnsupportedEncodingException e) {
74            e.printStackTrace();
75        } catch (InvalidKeySpecException e) {
76            e.printStackTrace();
77        } catch (NoSuchAlgorithmException e) {
78            e.printStackTrace();
79        } catch (BadPaddingException e) {
80            e.printStackTrace();
81        } catch (NoSuchPaddingException e) {
82            e.printStackTrace();
83        } catch (IllegalBlockSizeException e) {
84            e.printStackTrace();
85        }
86        return value;
87    }
88
89
90}