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1 package com.calipso.reportgenerator.common;
2
3 import javax.crypto.Cipher;
4 import javax.crypto.SecretKey;
5 import javax.crypto.IllegalBlockSizeException;
6 import javax.crypto.SecretKeyFactory;
7 import javax.crypto.spec.PBEKeySpec;
8 import javax.crypto.spec.PBEParameterSpec;
9 import java.io.UnsupportedEncodingException  ;
10 import java.security.spec.KeySpec ;
11 import java.security.spec.AlgorithmParameterSpec ;
12
13
18 public class Encrypter {
19 private Cipher ecipher;
20 private Cipher dcipher;
21
22 private byte[] salt = {
23 (byte)0xA9, (byte)0x9B, (byte)0xC8, (byte)0x32,
24 (byte)0x56, (byte)0x35, (byte)0xE3, (byte)0x03
25 };
26
27 private int iterationCount = 19;
28
29 public Encrypter(String passPhrase) throws Exception {
30 KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterationCount);
31 SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);
32 ecipher = Cipher.getInstance(key.getAlgorithm());
33 dcipher = Cipher.getInstance(key.getAlgorithm());
34 AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);
35 ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
36 dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
37 }
38
39 public Encrypter(SecretKey key) throws Exception {
40 ecipher = Cipher.getInstance("DESese");
41 dcipher = Cipher.getInstance("DESese");
42 ecipher.init(Cipher.ENCRYPT_MODE, key);
43 dcipher.init(Cipher.DECRYPT_MODE, key);
44 }
45
46 public String encrypt(String str) throws Exception {
47 byte[] utf8 = str.getBytes("UTF8");
48 byte[] enc = ecipher.doFinal(utf8);
49 return new sun.misc.BASE64Encoder().encode(enc);
50 }
51
52 public String decrypt(String str) throws Exception {
53 byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);
54 byte[] utf8 = dcipher.doFinal(dec);
55 return new String (utf8, "UTF8");
56 }
57 }
58 |
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