1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.databinding.xstream;
import java.io.IOException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
/**
* Utility methods.
*
* @version $Rev$ $Date$
*/
public class Utils {
public static String toBase64(byte[] array) {
String code = null;
code = new sun.misc.BASE64Encoder().encode(array);
return code;
}
public static byte[] fromBase64(String bytecode) {
byte[] dec = null;
try {
dec = new sun.misc.BASE64Decoder().decodeBuffer(bytecode);
} catch (IOException e) {
e.printStackTrace();
}
return dec;
}
public static String uniqueID() {
try {
//Initialize SecureRandom
//This is a lengthy operation, to be done only upon
//initialization of the application
SecureRandom prng = SecureRandom.getInstance("SHA1PRNG");
//generate a random number
String randomNum = Integer.toString(prng.nextInt());
//get its digest
MessageDigest sha = MessageDigest.getInstance("SHA-1");
byte[] result = sha.digest(randomNum.getBytes());
return hexEncode(result);
} catch (NoSuchAlgorithmException ex) {
ex.printStackTrace();
}
return null;
}
private static String hexEncode(byte[] aInput) {
StringBuffer result = new StringBuffer();
char[] digits = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
for (int idx = 0; idx < aInput.length; ++idx) {
byte b = aInput[idx];
result.append(digits[(b & 0xf0) >> 4]);
result.append(digits[b & 0x0f]);
}
return result.toString();
}
}
|
