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Extend certificate validity time on Windows Standard CA

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Subject Author Date
Extend certificate validity time on Windows Standard CA tashi 11-14-2008
Posted by tashi on November 14, 2008, 4:08 am
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Hi all

Since Windows 2003 Standard CA does not support the creation of
Certificate Templates. I would like to ask if its possible to change the
validity time from the issued certificates?

I found a description through the registry, but this does not work for
me: http://support.microsoft.com/?scid=kb%3Ben-us%3B254632&x=7&y=16

Regards
Tashi

Posted by Paul Adare on November 14, 2008, 4:27 am
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On Fri, 14 Nov 2008 10:08:30 +0100, tashi wrote:

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The validity of a certificate will be the lowest of the following values:

1. The lifetime remaining for the issuing CA's certificate.
2. The value in the certificate template (not applicable in your case).
3. The registry entries described in the KB article you posted.

Either the lifetime remaining in the issuing CA's certificate is less than
the desired lifetime for certificates you want to issue or you've made a
mistake with the registry entries.

On your CA, run the following two commands and then post the output:

certutil -getreg ca\validityperiod
certutil -getreg ca\validityperiodunits
--
Paul Adare
MVP - Identity Lifecycle Manager
http://www.identit.ca

Posted by tashi on November 14, 2008, 5:53 am
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Paul Adare schrieb:

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Hi Paul

Here is the Output from the certutil:

----------
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CertSvc\Configuration\CIRRUSCA\ValidityPeriod:

ValidityPeriod REG_SZ = Years
CertUtil: -getreg command completed successfully.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CertSvc\Configuration\CIRRUSCA\ValidityPeriodUnits:

ValidityPeriodUnits REG_DWORD = 4
CertUtil: -getreg command completed successfully.
----------

The CA Certificate is valid for 10 Years. I upload a screenshot from the
CA Certificate.

http://img357.imageshack.us/my.php?image=screenhunter29rp3.jpg

When I submit a certificate request I get certificates with only 2 years
validity.

http://img375.imageshack.us/my.php?image=screenhunter30sn0.jpg

Posted by Paul Adare on November 14, 2008, 6:06 am
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On Fri, 14 Nov 2008 11:53:40 +0100, tashi wrote:

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How is the certificate request being generated? On the details tab of an
issued certificate, what if anything is listed in the Certificate Template
Information field?

--
Paul Adare
MVP - Identity Lifecycle Manager
http://www.identit.ca

Posted by tashi on November 14, 2008, 7:45 am
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Paul Adare schrieb:
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The certificate request is generated from a SAP System. The SAP Admin
gave me the request to sign it.
In Details, Certificate Template Name there is the Entry WebServer. This
is the standard Web Server Template. I use the CA Web Service to sumbit
the request.

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