🚀 go-pugleaf

In article <1drej9INN8t8@svcase.sp.paramax.com>, scase@email.sp.paramax.com (Steve Case) writes:
|> I am trying to understand the various ASN.1 encoding and I cannot seem
|> to understand how the indefinite form for the length octets can possibly
|> work!  To make things simple, let me give you a specific example and
|> hopefully someone can clarify the situation for me.
|> 
|> Let's assume we are encoding a bitstring value.  The particular bitstring
|> to be encoded is '0900000009'H.  If I use the indefinite length format, 
|> wouldn't this be encoded as follows:
|> 
|>    BitString Length Contents
|>    23        80     000900000009
|> 
|>    EOC       Length
|>    00        00
|> 
|> 
|> My question, then, is when decoding this octet stream, how do you know
|> that the bitstring is '0900000009'H and not '09'H or '090'H or '0900'H
|> or '09000'H?  All three of these seem to be possible decodings?
|> 
Steve,

You cannot use indefinite form for a primitive type, e.g. BIT STRING.
Therefore, the answer is your encoding is invalid.

Tai

|> Thank you for any assistance you might be able to give me.
|> 
|> Regards,
|> Steve Case
|> scase@planet8.sp.paramax.com

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Tai Nguyen				Email: ...!bae.bellcore.com!tain
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