To create an x.509 certificate not using any tools

I'm having a project, is to generate an x.509 certificate without using any other tools, did anyone know the bytes structure of an x.509 v1 certificate, please kindly help! thanks!

x509 certificates are described using ASN.1 notation; see http://www.ietf.org/rfc/rfc2459.txt for all the gory options. The ASN.1 structures are encoded into bytes by following the Distinguished Encoding Rules (DER) for ASN.1. See "A Layman's Guide ..." at http://luca.ntop.org/Teaching/Appunti/asn1.html.

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    ORACLE 8i /windows 2000 server.
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    FOR SPACE MGT,
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    >
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    Revision: 16385
    Revision: 16385
    Author:   [email protected]
    Date:     2010-06-01 13:32:35 -0700 (Tue, 01 Jun 2010)
    Log Message:
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    Bugs: no
    Reviewer: Guarav
    Tests run: no
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