093eg1tC

1public class DesEncrypter {
2		Cipher ecipher;
3		Cipher dcipher;
4
5		// 8-byte Salt
6		byte[] salt = { (byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32,
7				(byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03 };
8
9		// Iteration count
10		int iterationCount = 19;
11
12		public DesEncrypter(String passPhrase) {
13			try {
14				// Create the key
15				KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(),
16						salt, iterationCount);
17				SecretKey key = SecretKeyFactory
18						.getInstance("PBEWithMD5AndDES")
19						.generateSecret(keySpec);
20				ecipher = Cipher.getInstance(key.getAlgorithm());
21				dcipher = Cipher.getInstance(key.getAlgorithm());
22
23				// Prepare the parameter to the ciphers
24				AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt,
25						iterationCount);
26
27				// Create the ciphers
28				ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
29				dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
30			} catch (Exception e) {
31				throw new RuntimeException(e);
32			}
33		}
34
35		public String encrypt(String str) {
36			try {
37				// Encode the string into bytes using utf-8
38				byte[] utf8 = str.getBytes("UTF8");
39
40				// Encrypt
41				byte[] enc = ecipher.doFinal(utf8);
42
43				// Encode bytes to base64 to get a string
44				return Base64.encodeBase64String(enc);
45			} catch (Exception e) {
46				throw new RuntimeException(e);
47			}
48		}
49
50		public String decrypt(String str) {
51			try {
52				// Decode base64 to get bytes
53				byte[] dec = Base64.decodeBase64(str);
54
55				// Decrypt
56				byte[] utf8 = dcipher.doFinal(dec);
57
58				// Decode using utf-8
59				return new String(utf8, "UTF8");
60			} catch (Exception e) {
61				throw new RuntimeException(e);
62			}
63		}
64	}