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Re: [TLS] Verifying X.509 Certificate Chains out of order

pgut001@cs.auckland.ac.nz (Peter Gutmann) Tue, 07 October 2008 14:14 UTC

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From: pgut001@cs.auckland.ac.nz
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Date: Wed, 08 Oct 2008 03:14:19 +1300
Cc: tls@ietf.org
Subject: Re: [TLS] Verifying X.509 Certificate Chains out of order
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Martin Rex <Martin.Rex@sap.com> writes:

>Would a zero-length ASN.1 SEQUENCE not require that DistinguishedName have a
>zero length?

A zero-length BER encoding of a SEQUENCE would be 30 81 00, which meets the
minimum-length requirements of 3 bytes.

(I'd always assumed that the limit of 3 bytes was specifically to allow this
encoding of an empty DN, since it's not possible to get a DN that fits into 3
bytes).

Peter.
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