From tarun at ebprovider.com  Sat Aug 12 10:12:57 2000
From: tarun at ebprovider.com (Tarun Upadhyay)
Date: Sat, 12 Aug 2000 13:42:57 +0530
Subject: DER Parser
Message-ID: <020701c00435$2453e6b0$0401a8c0@EBPROVIDER>

Hi all,

I have just completed a DER Certificate Parser in Flex.
For the want of CVS access, I am sending it attached for review (hopefully,
there are not too many people on the list !!)
Currently the display is not indented but I will do that asap

To Do List:
1. move the parser out of Flex and into 'real' C.
2. check it for bugs and add support for indented display.
3. provide interface to allow function calls to be made to read a particular
attribute of the certificate. (somewhat like cert in SSLeay)
4. may be provide a DER2XML utility.

I plan to do all this by the next weekend.
If anybody could point me to a few assorted DER certificates for debugging
and testing, I will be obliged.

With Warm Regards
Tarun Upadhyay
http://ebprovider.com/people/tarun
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From tarun at ebprovider.com  Mon Aug 21 03:33:48 2000
From: tarun at ebprovider.com (Tarun Upadhyay)
Date: Mon, 21 Aug 2000 07:03:48 +0530
Subject: ASN 1 Parser 
Message-ID: <01e801c00b0f$dc8ac1f0$0401a8c0@EBPROVIDER>

This is in reference to flex code I posted in my last mail.

I have written an ASN 1 Parser for DER encoded certificates in C.
Currently, the parser reads in DER encoded file from standard input and
outputs a human readable text heirarchy on standard output.

The source and executable are at:
http://www.ebprovider.com/people/tarun/projects/GNUTLS

The limitations:
a) Object Identifiers are not well supported (As I dont understand how they
are parsed)

To be done:
a) add better support for Object Identifiers
b) convert executable to library
c) add support to parse ASN1 to XML
d) build X509 API over this API to support higher level calls.

With Warm Regards
Tarun Upadhyay
http://ebprovider.com/people/tarun