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using System;
using System.Globalization;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.X509
{
public class Time
: Asn1Encodable, IAsn1Choice
{
private readonly Asn1Object time;
public static Time GetInstance(
Asn1TaggedObject obj,
bool explicitly)
{
return GetInstance(obj.GetObject());
}
public Time(
Asn1Object time)
{
if (time == null)
throw new ArgumentNullException("time");
if (!(time is DerUtcTime) && !(time is Asn1GeneralizedTime))
throw new ArgumentException("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.
*/
public Time(DateTime date)
{
string d = date.ToUniversalTime().ToString("yyyyMMddHHmmss", CultureInfo.InvariantCulture) + "Z";
int year = int.Parse(d.Substring(0, 4));
if (year < 1950 || year > 2049)
{
time = new DerGeneralizedTime(d);
}
else
{
time = new DerUtcTime(d.Substring(2));
}
}
public static Time GetInstance(
object obj)
{
if (obj == null || obj is Time)
return (Time)obj;
if (obj is DerUtcTime)
return new Time((DerUtcTime)obj);
if (obj is Asn1GeneralizedTime)
return new Time((Asn1GeneralizedTime)obj);
throw new ArgumentException("unknown object in factory: " + Platform.GetTypeName(obj), "obj");
}
public string GetTime()
{
if (time is DerUtcTime)
{
return ((DerUtcTime)time).AdjustedTimeString;
}
return ((Asn1GeneralizedTime)time).GetTime();
}
/// <summary>
/// Return our time as DateTime.
/// </summary>
/// <returns>A date time.</returns>
public DateTime ToDateTime()
{
try
{
if (time is DerUtcTime)
{
return ((DerUtcTime)time).ToAdjustedDateTime();
}
else
{
return ((Asn1GeneralizedTime)time).ToDateTime();
}
}
catch (FormatException e)
{
// this should never happen
throw new InvalidOperationException("invalid date string: " + e.Message);
}
}
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* Time ::= CHOICE {
* utcTime UTCTime,
* generalTime GeneralizedTime }
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
return time;
}
public override string ToString()
{
return GetTime();
}
}
}
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