1package org.bouncycastle.asn1.x509;
2
3import java.text.ParsePosition;
4import java.text.SimpleDateFormat;
5import java.util.Date;
6import java.util.SimpleTimeZone;
7
8import org.bouncycastle.asn1.ASN1Choice;
9import org.bouncycastle.asn1.ASN1Encodable;
10import org.bouncycastle.asn1.ASN1TaggedObject;
11import org.bouncycastle.asn1.DERGeneralizedTime;
12import org.bouncycastle.asn1.DERObject;
13import org.bouncycastle.asn1.DERUTCTime;
14
15public class Time
16    extends ASN1Encodable
17    implements ASN1Choice
18{
19    DERObject   time;
20
21    public static Time getInstance(
22        ASN1TaggedObject obj,
23        boolean          explicit)
24    {
25        return getInstance(obj.getObject()); // must be explicitly tagged
26    }
27
28    public Time(
29        DERObject   time)
30    {
31        if (!(time instanceof DERUTCTime)
32            && !(time instanceof DERGeneralizedTime))
33        {
34            throw new IllegalArgumentException("unknown object passed to Time");
35        }
36
37        this.time = time;
38    }
39
40    /**
41     * creates a time object from a given date - if the date is between 1950
42     * and 2049 a UTCTime object is generated, otherwise a GeneralizedTime
43     * is used.
44     */
45    public Time(
46        Date    date)
47    {
48        SimpleTimeZone      tz = new SimpleTimeZone(0, "Z");
49        SimpleDateFormat    dateF = new SimpleDateFormat("yyyyMMddHHmmss");
50
51        dateF.setTimeZone(tz);
52
53        String  d = dateF.format(date) + "Z";
54        int     year = Integer.parseInt(d.substring(0, 4));
55
56        if (year < 1950 || year > 2049)
57        {
58            time = new DERGeneralizedTime(d);
59        }
60        else
61        {
62            time = new DERUTCTime(d.substring(2));
63        }
64    }
65
66    public static Time getInstance(
67        Object  obj)
68    {
69        if (obj instanceof Time)
70        {
71            return (Time)obj;
72        }
73        else if (obj instanceof DERUTCTime)
74        {
75            return new Time((DERUTCTime)obj);
76        }
77        else if (obj instanceof DERGeneralizedTime)
78        {
79            return new Time((DERGeneralizedTime)obj);
80        }
81
82        throw new IllegalArgumentException("unknown object in factory");
83    }
84
85    public String getTime()
86    {
87        if (time instanceof DERUTCTime)
88        {
89            return ((DERUTCTime)time).getAdjustedTime();
90        }
91        else
92        {
93            return ((DERGeneralizedTime)time).getTime();
94        }
95    }
96
97    public Date getDate()
98    {
99        SimpleDateFormat dateF = new SimpleDateFormat("yyyyMMddHHmmssz");
100
101        return dateF.parse(this.getTime(), new ParsePosition(0));
102    }
103
104    /**
105     * Produce an object suitable for an ASN1OutputStream.
106     * <pre>
107     * Time ::= CHOICE {
108     *             utcTime        UTCTime,
109     *             generalTime    GeneralizedTime }
110     * </pre>
111     */
112    public DERObject toASN1Object()
113    {
114        return time;
115    }
116}
117