srB2Zac7

1import java.security.MessageDigest;
2import java.util.Arrays;
3
4import javax.crypto.Cipher;
5import javax.crypto.SecretKey;
6import javax.crypto.spec.IvParameterSpec;
7import javax.crypto.spec.SecretKeySpec;
8
9public class TripleDESTest {
10
11    public static void main(String[] args) throws Exception {
12
13    	String text = "kyle boon";
14
15    	byte[] codedtext = new TripleDESTest().encrypt(text);
16    	String decodedtext = new TripleDESTest().decrypt(codedtext);
17
18    	System.out.println(codedtext); // this is a byte array, you'll just see a reference to an array
19    	System.out.println(decodedtext); // This correctly shows "kyle boon"
20    }
21
22    public byte[] encrypt(String message) throws Exception {
23    	final MessageDigest md = MessageDigest.getInstance("md5");
24    	final byte[] digestOfPassword = md.digest("HG58YZ3CR9"
25    			.getBytes("utf-8"));
26    	final byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
27    	for (int j = 0, k = 16; j < 8;) {
28    		keyBytes[k++] = keyBytes[j++];
29    	}
30
31    	final SecretKey key = new SecretKeySpec(keyBytes, "DESede");
32    	final IvParameterSpec iv = new IvParameterSpec(new byte[8]);
33    	final Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
34    	cipher.init(Cipher.ENCRYPT_MODE, key, iv);
35
36    	final byte[] plainTextBytes = message.getBytes("utf-8");
37    	final byte[] cipherText = cipher.doFinal(plainTextBytes);
38    	// final String encodedCipherText = new sun.misc.BASE64Encoder()
39    	// .encode(cipherText);
40
41    	return cipherText;
42    }
43
44    public String decrypt(byte[] message) throws Exception {
45    	final MessageDigest md = MessageDigest.getInstance("md5");
46    	final byte[] digestOfPassword = md.digest("HG58YZ3CR9"
47    			.getBytes("utf-8"));
48    	final byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
49    	for (int j = 0, k = 16; j < 8;) {
50    		keyBytes[k++] = keyBytes[j++];
51    	}
52
53    	final SecretKey key = new SecretKeySpec(keyBytes, "DESede");
54    	final IvParameterSpec iv = new IvParameterSpec(new byte[8]);
55    	final Cipher decipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
56    	decipher.init(Cipher.DECRYPT_MODE, key, iv);
57
58    	// final byte[] encData = new
59    	// sun.misc.BASE64Decoder().decodeBuffer(message);
60    	final byte[] plainText = decipher.doFinal(message);
61
62    	return new String(plainText, "UTF-8");
63    }
64}