Re: Object identifiers and ASN.1 syntax

[Richard Levitte - VMS Whacker]

From: Dr S N Henson <[EMAIL PROTECTED]>
Subject: Re: Object identifiers and ASN.1 syntax
Date: Tue, 03 Oct 2000 21:31:40 +0100
Message-ID: <[EMAIL PROTECTED]>

drh> Richard Levitte - VMS Whacker wrote:
drh> > 
drh> > 
drh> > I'm trying to make a simple perl script that is capable of parsing
drh> > through an ASN.1 module embedded in any document an extracting the
drh> > OIDs from it.  When I'm done with that, I'll extend it to be able to
drh> > parse LDAP schemas entries as in RFC2256.  Then we will perhaps
drh> > finally clear the mess that's currently present in
drh> > crypto/objects/objects.txt...
drh> > 
drh> 
drh> Well if you feel like making it a bit more complex so it can yank out
drh> field names and ultimate types then that would probably be enough to be
drh> fairly easily convertible into an ASN1 compiler that my stuff could
drh> support.

Well...  I'm trying to make it general enough to be extensible ni that
direction (or any direction).  Right now, it's built to recognise what
a module starts (word [OID] DEFINITIONS (EXPLICIT|IMPLICIT|AUTOMATIC)
TAGS ::=), some parts of the header (IMPORTS :-)), where the body of
that module starts (BEGIN) and where it ends (END).  It is capable of
recognising any definition ('whatever ::= whatever', basically :-))
within the body and parse past them.  It gives IMPORTS and any
'whatever OBJECT IDENTIFIER ::= OID' special treatment, for obvious
reasons.  That's basically it.  It can probably be extended to
recognise any definition and treat them appropriately, if one awnts to
hack it enough.  Just let me concentrate on OIDs for now, OK?  :-)

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