1/*
2 *  Licensed to the Apache Software Foundation (ASF) under one or more
3 *  contributor license agreements.  See the NOTICE file distributed with
4 *  this work for additional information regarding copyright ownership.
5 *  The ASF licenses this file to You under the Apache License, Version 2.0
6 *  (the "License"); you may not use this file except in compliance with
7 *  the License.  You may obtain a copy of the License at
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 */
17
18/**
19* @author Vladimir N. Molotkov
20*/
21
22package org.apache.harmony.auth.tests.support;
23
24import java.io.File;
25import java.io.FileOutputStream;
26import java.io.IOException;
27import java.security.Security;
28import java.util.Properties;
29
30/**
31 * Test utility class
32 */
33public class TestUtils {
34
35    /**
36     * No need to instantiate
37     */
38    private TestUtils() {
39    }
40
41    /**
42     * Prints byte array <code>data</code> as hex to the
43     * <code>System.out</code> in the customizable form.
44     *
45     * @param perLine how many numbers put on single line
46     * @param prefix custom output number prefix
47     * @param delimiter custom output number delimiter
48     * @param data data to be printed
49     */
50    public static void printAsHex(int perLine,
51                                  String prefix,
52                                  String delimiter,
53                                  byte[] data) {
54        for (int i=0; i<data.length; i++) {
55            String tail = Integer.toHexString(0x000000ff & data[i]);
56            if (tail.length() == 1) {
57                tail = "0" + tail;
58            }
59            System.out.print(prefix + "0x" + tail + delimiter);
60
61            if (((i+1)%perLine) == 0) {
62                System.out.println("");
63            }
64        }
65        System.out.println("");
66    }
67
68    /**
69     * Sets system property
70     *
71     * @param key - the name of the system property.
72     * @param value - the value to be set
73     */
74    public static void setSystemProperty(String key, String value) {
75        Properties properties = System.getProperties();
76        if (value == null) {
77            properties.remove(key);
78        } else {
79            properties.setProperty(key, value);
80        }
81        System.setProperties(properties);
82    }
83
84    /**
85     * Creates security properties file.
86     *
87     * The method puts to the file all initial security providers and adds
88     * passed custom properties.
89     *
90     * @param props -
91     *            security properties to be added to properties file
92     * @return path to created file.
93     * @throws IOException
94     *             if failed to create the file
95     */
96    public static String createJavaPropertiesFile(Properties props)
97            throws IOException {
98
99        File f = File.createTempFile("java", "security");
100        f.deleteOnExit();
101
102        FileOutputStream out = new FileOutputStream(f);
103
104        Properties propsToFlush = new Properties();
105
106        int i = 1;
107        String provider = "security.provider.1";
108        while (Security.getProperty(provider) != null) {
109            propsToFlush.setProperty(provider, Security.getProperty(provider));
110            provider = "security.provider." + i++;
111        }
112
113        props.store(out, null);
114        propsToFlush.store(out, null);
115
116        out.close();
117
118        return f.getAbsolutePath();
119    }
120}
121