Yet, in RFC 3280, one can read :

<<
4.1.2.5  Validity
   [...]  Both notBefore and notAfter may be encoded as UTCTime or
   GeneralizedTime.
   CAs conforming to this profile MUST always encode certificate
   validity dates through the year 2049 as UTCTime; certificate validity
   dates in 2050 or later MUST be encoded as GeneralizedTime.
   [...]

  Validity ::= SEQUENCE {
        notBefore      Time,
        notAfter       Time }

   Time ::= CHOICE {
        utcTime        UTCTime,
        generalTime    GeneralizedTime }
>>

> -----Message d'origine-----
> De : Erwann ABALEA [mailto:[EMAIL PROTECTED]]
> Envoyé : lundi 22 juillet 2002 12:38
> À : OpenSSL Users Mailing List
> Objet : Re: generalizedTime in certificates
> 
> 
> On Mon, 22 Jul 2002, Warich, Eyck wrote:
> 
> > Hello there,
> >
> > i'm using openSSL for the creation of x.509 user 
> certificates. I want the
> > validities [from-until] in the certificates to be encoded 
> in generalizedTime
> > format (instead of utc time format). Is there a way to 
> configure this (.cnf,
> > command line)?
> 
> No, since X.509 certificates *must* use UTCTime. If you 
> really *need* to
> have generalizedTime, then you won't have X.509 compliant 
> certificates.
> 
> -- 
> Erwann ABALEA <[EMAIL PROTECTED]> - RSA PGP Key ID: 0x2D0EABD5
> -----
> La Fondue Bourguignone> Ca dénote du niveau
> JLC> Transitif direct, dénoter.
> la netiquette, tu oublies la netiquette
> -+- C in GNU - Sans escale : Transit direct pour connardland -+-
> 
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