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1
12
13 package org.openbravo.utils;
14
15 import javax.servlet.ServletException  ;
16 import javax.crypto.*;
17 import javax.crypto.spec.*;
18
19 public class CryptoUtility {
20 private static Cipher s_cipher = null;
21 private static SecretKey s_key = null;
22
23 public CryptoUtility() {
24 }
25
26 public static void main(String argv[]) throws Exception {
27 System.out.println("Enter encryption password: ");
28 System.out.flush();
29 String clave = argv[0];
30 System.out.println("************* " + clave);
31 String strEnc = CryptoUtility.encrypt(clave);
32 System.out.println("ENCRIPTED TEXT: " + strEnc);
33 System.out.println("DECRIPTED TEXT: " + CryptoUtility.decrypt(strEnc));
34 }
35
36 private static void initCipher() {
37 try {
38 s_key = new SecretKeySpec(new byte[] {
39 100, 25, 28, -122, -26, 94, -3, -72
40 }, "DES");
41 s_cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
42 } catch(Exception ex) {
43 ex.printStackTrace();
44 }
45 }
46
47 public static String encrypt(String value) throws ServletException {
48 byte encString[];
49 String clearText;
50 clearText = value;
51 if(clearText == null) clearText = "";
52 if(s_cipher == null) initCipher();
53 if(s_cipher == null) throw new ServletException ("CryptoUtility.encrypt() - Can't load cipher");
54 try {
55 s_cipher.init(Cipher.ENCRYPT_MODE, s_key);
56 encString = s_cipher.doFinal(clearText.getBytes());
57 } catch (Exception ex) {
58 ex.printStackTrace();
59 throw new ServletException ("CryptoUtility.encrypt() - Can't init cipher");
60 }
61 return new String (encString);
62 }
63
64 public static String decrypt(String value) throws ServletException {
65 if(value == null) return null;
66 if(value.length() == 0) return value;
67 if(s_cipher == null) initCipher();
68 if(s_cipher == null || value == null || value.length() <= 0) throw new ServletException ("CryptoUtility.decrypt() - Can't load cipher");
69 byte out[];
70 try {
71 s_cipher.init(Cipher.DECRYPT_MODE, s_key);
72 out = s_cipher.doFinal(value.getBytes());
73 } catch (Exception ex) {
74 ex.printStackTrace();
75 throw new ServletException ("CryptoUtility.decrypt() - Can't init cipher");
76 }
77 return new String (out);
78 }
79 }
80 |
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