org.bouncycastle.asn1.cms.Time Maven / Gradle / Ivy

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The Bouncy Castle Java APIs for ASN.1 extension and utility APIs used to support bcpkix and bctls with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.
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/***************************************************************/
/******    DO NOT EDIT THIS CLASS bc-java SOURCE FILE     ******/
/***************************************************************/
package org.bouncycastle.asn1.cms;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.SimpleTimeZone;

import org.bouncycastle.asn1.ASN1Choice;
import org.bouncycastle.asn1.ASN1GeneralizedTime;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.ASN1UTCTime;
import org.bouncycastle.asn1.DERGeneralizedTime;
import org.bouncycastle.asn1.DERUTCTime;

/**
 * RFC 5652:
 * Dual-mode timestamp format producing either UTCTIme or GeneralizedTime.
 * 
 * 
 * Time ::= CHOICE {
 *     utcTime        UTCTime,
 *     generalTime    GeneralizedTime }
 * 
 * 
 * This has a constructor using java.util.Date for input which generates
 * a {@link org.bouncycastle.asn1.DERUTCTime DERUTCTime} object if the
 * supplied datetime is in range 1950-01-01-00:00:00 UTC until 2049-12-31-23:59:60 UTC.
 * If the datetime value is outside that range, the generated object will be
 * {@link org.bouncycastle.asn1.DERGeneralizedTime DERGeneralizedTime}.
 */
public class Time
    extends ASN1Object
    implements ASN1Choice
{
    ASN1Primitive time;

    public static Time getInstance(
        ASN1TaggedObject obj,
        boolean          explicit)
    {
        return getInstance(obj.getObject());
    }

    private Time(
        ASN1Primitive   time)
    {
        if (!(time instanceof ASN1UTCTime)
            && !(time instanceof ASN1GeneralizedTime))
        {
            throw new IllegalArgumentException("unknown object passed to Time");
        }

        this.time = time; 
    }

    /**
     * Creates a time object from a given date - if the date is between 1950
     * and 2049 a UTCTime object is generated, otherwise a GeneralizedTime
     * is used.
     *
     * @param time a date object representing the time of interest.
     */
    public Time(
        Date    time)
    {
        SimpleTimeZone      tz = new SimpleTimeZone(0, "Z");
        SimpleDateFormat    dateF = new SimpleDateFormat("yyyyMMddHHmmss");

        dateF.setTimeZone(tz);

        String  d = dateF.format(time) + "Z";
        int     year = Integer.parseInt(d.substring(0, 4));

        if (year < 1950 || year > 2049)
        {
            this.time = new DERGeneralizedTime(d);
        }
        else
        {
            this.time = new DERUTCTime(d.substring(2));
        }
    }

    /**
     * Creates a time object from a given date and locale - if the date is between 1950
     * and 2049 a UTCTime object is generated, otherwise a GeneralizedTime
     * is used. You may need to use this constructor if the default locale
     * doesn't use a Gregorian calender so that the GeneralizedTime produced is compatible with other ASN.1 implementations.
     *
     * @param time a date object representing the time of interest.
     * @param locale an appropriate Locale for producing an ASN.1 GeneralizedTime value.
     */
    public Time(
        Date    time,
        Locale locale)
    {
        SimpleTimeZone      tz = new SimpleTimeZone(0, "Z");
        SimpleDateFormat    dateF = new SimpleDateFormat("yyyyMMddHHmmss", locale);

        dateF.setTimeZone(tz);

        String  d = dateF.format(time) + "Z";
        int     year = Integer.parseInt(d.substring(0, 4));

        if (year < 1950 || year > 2049)
        {
            this.time = new DERGeneralizedTime(d);
        }
        else
        {
            this.time = new DERUTCTime(d.substring(2));
        }
    }

    /**
     * Return a Time object from the given object.
     * 

     * Accepted inputs:
     * 

     *  null → null
     * 
 {@link Time} object
     * 
 {@link org.bouncycastle.asn1.DERUTCTime DERUTCTime} object
     * 
 {@link org.bouncycastle.asn1.DERGeneralizedTime DERGeneralizedTime} object
     * 
     *
     * @param obj the object we want converted.
     * @exception IllegalArgumentException if the object cannot be converted.
     */
    public static Time getInstance(
        Object  obj)
    {
        if (obj == null || obj instanceof Time)
        {
            return (Time)obj;
        }
        else if (obj instanceof ASN1UTCTime)
        {
            return new Time((ASN1UTCTime)obj);
        }
        else if (obj instanceof ASN1GeneralizedTime)
        {
            return new Time((ASN1GeneralizedTime)obj);
        }

        throw new IllegalArgumentException("unknown object in factory: " + obj.getClass().getName());
    }

    /**
     * Get the date+tine as a String in full form century format.
     */
    public String getTime()
    {
        if (time instanceof ASN1UTCTime)
        {
            return ((ASN1UTCTime)time).getAdjustedTime();
        }
        else
        {
            return ((ASN1GeneralizedTime)time).getTime();
        }
    }

    /**
     * Get java.util.Date version of date+time.
     */
    public Date getDate()
    {
        try
        {
            if (time instanceof ASN1UTCTime)
            {
                return ((ASN1UTCTime)time).getAdjustedDate();
            }
            else
            {
                return ((ASN1GeneralizedTime)time).getDate();
            }
        }
        catch (ParseException e)
        {         // this should never happen
            throw new IllegalStateException("invalid date string: " + e.getMessage());
        }
    }

    /**
     * Produce an object suitable for an ASN1OutputStream.
     */
    public ASN1Primitive toASN1Primitive()
    {
        return time;
    }
}