BzEm9bPk

1package pl.ready4s.extafreenew.utils;
2
3
4
5import android.util.Log;
6
7
8import java.io.UnsupportedEncodingException;
9import java.math.BigInteger;
10
11import javax.crypto.Cipher;
12import javax.crypto.spec.SecretKeySpec;
13
14/**
15 * Created by belhaver on 24.11.16.
16 */
17
18public class EncryptDecryptUtils {
19
20    final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();
21    private static final String KEY = "7E152B16AEA6D228AB99157E4709CF3C";
22
23    public static String encrypt(String password) {
24        byte[] passwordByteArray = getByteArray(password);
25//        byte[] passwordByteArray = password.getBytes();
26        try {
27            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
28            byte[] tmp = hexStringToByteArray(KEY);
29            SecretKeySpec secretKeySpec = new SecretKeySpec(hexStringToByteArray(KEY), "AES");
30
31
32            cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
33            byte[] cipherText = cipher.doFinal(passwordByteArray);
34            String encryptedString = bytesArrayToHexString(cipherText);
35//            String encryptedString = Base64.encodeToString(cipherText, Base64.NO_PADDING);
36
37            Log.d(EncryptDecryptUtils.class.getSimpleName(), "Encrypted password: " + encryptedString);
38            return encryptedString;
39        } catch (Exception e) {
40            e.printStackTrace();
41        }
42        return "";
43    }
44
45    public static String decrypt(String encryptedPassword) {
46        try {
47            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
48            SecretKeySpec secretKey = new SecretKeySpec(hexStringToByteArray(KEY), "AES");
49            cipher.init(Cipher.DECRYPT_MODE, secretKey);
50            byte[] cipherText = hexStringToByteArray(encryptedPassword);
51            String decryptedString = new String(cipher.doFinal(cipherText),"UTF-8");
52            Log.d(EncryptDecryptUtils.class.getSimpleName(), "Before decryption: " + encryptedPassword);
53            Log.d(EncryptDecryptUtils.class.getSimpleName(), "Decrypted password: " + decryptedString);
54            return decryptedString;
55        } catch (Exception e) {
56            e.printStackTrace();
57        }
58        return null;
59    }
60
61    private static byte[] getByteArray(String password) {
62        byte[] passwordByteArray = new byte[32];
63        for (int i = 0; i < password.length(); i++) {
64            try {
65                passwordByteArray[i] = password.getBytes("UTF-8")[i];
66            } catch (UnsupportedEncodingException e) {
67                e.printStackTrace();
68            }
69        }
70        return passwordByteArray;
71    }
72
73    private static byte[] hexStringToByteArray(String hexString) {
74        byte[] b = new BigInteger(hexString,16).toByteArray();
75//        int len = hexString.length();
76//        byte[] data = new byte[len / 2];
77//        for (int i = 0; i < len; i += 2) {
78//            try {
79//                data[i / 2] = ((Character.digit(hexString.charAt(i), 16) << 4) + Character.digit(hexString.charAt(i+1), 16));
80//            } catch (IndexOutOfBoundsException e) {
81//                break;
82//            }
83//        }
84        return b;
85    }
86
87    private static String bytesArrayToHexString(byte[] byteArray) {
88        char[] hexChars = new char[byteArray.length * 2];
89        for ( int j = 0; j < byteArray.length; j++ ) {
90            try {
91                int v = byteArray[j] & 0xFF;
92                hexChars[j * 2] = hexArray[v >>> 4];
93                hexChars[j * 2 + 1] = hexArray[v & 0x0F];
94            } catch (IndexOutOfBoundsException e) {
95                break;
96            }
97        }
98        return new String(hexChars);
99    }
100}