Dates and certificates

[Xueming Shen]

Calendar's month starts with 0, so December is 11, not 12. Yes, people 
have been
complaining this for years, and the JSR310 will have an enum type of 
month and
the integer type will be "1" based.

-Sherman

On 04/10/2012 08:23 AM, Sean Mullan wrote:
> On 04/09/2012 02:07 PM, Michael StJohns wrote:
>> Hi -
>>
>> I've been trying to figure out which changes would be necessary to
>> support the "inifinite" date used in RFC5280 for certificates that
>> don't expire (e.g. 99991231255959).    (e.g.
>> java.security.cert.X509Certificate)
>>
>> I first thought this would be as easy as supporting the use of
>> Calendar instead or in addition to Date for the notBefore and
>> notAfter fields.  That would require an API change.
>
> Can you explain why you think Date would not be sufficient?
>
>> In the process of testing whether or not Calendar would support this
>> I wrote the following short program:
>>
>>
>> import java.util.Calendar; import java.util.TimeZone; import
>> java.util.GregorianCalendar;
>>
>> public class TestDate {
>>
>> public static void main (String[] args) throws Exception {
>>
>> Calendar c = Calendar.getInstance(); //    Calendar c = new
>> GregorianCalendar(9999,12,31,23,59,59);
>> c.setTimeZone(TimeZone.getTimeZone("GMT-0")); c.set
>> (Calendar.ZONE_OFFSET, 0); c.set (Calendar.YEAR, 9999); c.set
>> (Calendar.MONTH,12); c.set (Calendar.DATE,31); c.set
>> (Calendar.HOUR,23); c.set (Calendar.MINUTE,59); c.set
>> (Calendar.SECOND,59);
>>
>> System.out.printf ("%tY%<tm%<td%<tH%<tM%<tS%n",c); //
>> System.out.println (c); } }
>>
>> I expected to get "99991231235959" out.  What I got was
>> "100000201115959".  Or somewhat over 1 month off.
>>
>> I haven't tracked down why this is the case (could be the format
>> process, could be a conversion to Date, could be something else), but
>> I thought I'd pass it along.
>
> I'm not sure. I've copied Xueming (Sherman) who might know the answer.
>
> --Sean
>
>>
>> In any event, could we update the API to support Calendar for
>> certificate related dates?
>>
>> Later, Mike
>>
>