Change validatiy period of a Root certificate

Change validatiy period of a Root certificate

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Change validatiy period of a Root certificate Gunna 09-10-2008
Posted by =?Utf-8?B?R3VubmE=?= on September 10, 2008, 11:05 pm
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Appologies if this is covered elsewhere, I did google it first. I have a
Standalone Root CA whos certificate is only valid for 5 years. Is there a
way I can renew the Root certificate extending the validity period. I know
setting the validity period etc on the CA seems to only affect certificates
issued from the CA but not the CA's root certificate.

Is this possible or am i looking at a rebuild? BTW I inherited this PKI so
I had nothing to do with the planning, i know good planning is important.

Posted by =?Utf-8?B?R3VubmE=?= on September 10, 2008, 11:16 pm
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Ok, seems you can do it using a capolicy.inf file. What's the main reasons
for using one of these? From what I understand your options are selectable
using a capolicy.inf file. Any other good reasons?

"Gunna" wrote:

> Appologies if this is covered elsewhere, I did google it first. I have a
> Standalone Root CA whos certificate is only valid for 5 years. Is there a
> way I can renew the Root certificate extending the validity period. I know
> setting the validity period etc on the CA seems to only affect certificates
> issued from the CA but not the CA's root certificate.
>
> Is this possible or am i looking at a rebuild? BTW I inherited this PKI so
> I had nothing to do with the planning, i know good planning is important.

Posted by Paul Adare - MVP on September 11, 2008, 3:23 am
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On Wed, 10 Sep 2008 20:16:01 -0700, Gunna wrote:

> Ok, seems you can do it using a capolicy.inf file. What's the main reasons
> for using one of these? From what I understand your options are selectable
> using a capolicy.inf file. Any other good reasons?

For some operations, such as changing the key length, the lifetime, or
setting the CDP and AIA locations to null for a root cert you have to use
CAPolicy.inf. It is best to get into the habit of always using this file,
both when installing and renewing a CA.

--
Paul Adare
MVP - Identity Lifecycle Manager
http://www.identit.ca
Analog: Hors d'oeuvre, usually made from cheese and covered with crushed
nuts. Served at all staff parties.

Posted by =?Utf-8?B?R3VubmE=?= on September 14, 2008, 6:58 pm
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Many thanks Brian,

Could you answer a question rasied from the info below. I notied in a lot of
the sample capolicy.inf files for a Root CA that the CDP and AIA are set to
empty. Does this mean that the recomendation os not to have a CDP or AIA for
a Root CA or is it suggestting use the settings in the management console or
soemthign else?

Apollogies if the answer is in your book, im not that far yet.

"Brian Komar (MVP)" wrote:

> 1) You need to edit the %windir%\capolicy.inf file (this does a 20 year
> renewal)
> [Version]
> Signature="$Windows NT$"
>
> [certsrv_server]
> renewalkeylength=2048
> RenewalValidityPeriodUnits=20
> RenewalValidityPeriod=years
>
> CRLPeriod=weeks
> CRLPeriodUnits=26
> CRLDeltaPeriodUnits=0
> CRLDeltaPeriod=days
>
> [CRLDistributionPoint]
> Empty=True
>
> [AuthorityInformationAccess]
> Empty=True
>
> 2) Renew the root CA with a new key pair (there is a bug here in 2003, that
> does not recognize the capolicy.inf when you renew with a new key paior
> 3) REnew the root CA with the same key pair (this reads the capolicy.inf)
> Now good for 20 years.
>
> Brian
>
>
>
> > Appologies if this is covered elsewhere, I did google it first. I have a
> > Standalone Root CA whos certificate is only valid for 5 years. Is there a
> > way I can renew the Root certificate extending the validity period. I
> > know
> > setting the validity period etc on the CA seems to only affect
> > certificates
> > issued from the CA but not the CA's root certificate.
> >
> > Is this possible or am i looking at a rebuild? BTW I inherited this PKI
> > so
> > I had nothing to do with the planning, i know good planning is important.
>

Posted by Paul Adare - MVP on September 14, 2008, 7:39 pm
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On Sun, 14 Sep 2008 15:58:01 -0700, Gunna wrote:

> Does this mean that the recomendation os not to have a CDP or AIA for
> a Root CA or is it suggestting use the settings in the management console or
> soemthign else?

The former.

--
Paul Adare
MVP - Identity Lifecycle Manager
http://www.identit.ca
If it was easy, the hardware people would take care of it.

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