ASN.1 DER (de)/coding tools

From: Lars Olaussen (Isolauss_at_hotmail.com)
Date: 04/28/04 

Date: Wed, 28 Apr 2004 11:30:37 +0200

Hi

Does anyone know about tools to code/decode ASN.1 DER?

Some of the things I'd like to achieve are:
 - extracting certificatePolicies information from a certificate,
decode it, edit it, and re-encode it so I can use it as input to a
new certificate (by certutil.exe -setextension)
 - extract subject information from a certificate, decode it, add a
SN value, and re-encode it so I can replace the subject-information
provided in the request.
 - define and combine different extKeyUsages and encode them to be
used as input to certutil.exe -setextension

I guess that these things could be made possible by using
certificate templates in Certificate Services, but I'm not always
using an Enterprise CA. It might also be required to edit a
certificate request from a certificate template by using this
method.

I've been trying to find applications that could provide these
features, but I haven't found any yet, so any suggestions would be
appreciated.

Regards,
Lars Olaussen
Isolauss@hotmail.com

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