[openssl-users] Are double-quotes valid characters in certifcates/keys?

Viktor Dukhovni openssl-users at dukhovni.org
Mon Apr 11 15:26:23 UTC 2016

On Mon, Apr 11, 2016 at 10:01:33AM +0530, Ajay Garg wrote:

[ Subject: Are double-quotes valid characters in certifcates/keys? ]

> Could not find a definitive answer on google, so thought it would be
> best to ask the experts :)

The question is ill-formed.  Are you asking about allowed characters
in some field of the underlying canonical ASN.1 DER form of a
certificate, or about some particular encoding of the certificate
(e.g. PEM)?

If the former, X.509v3 certificates are complicated objects, which
part of the certificate are you asking about?

As for keys, in their ASN.1 DER encoding they are "binary" data,
and all octets are a priori valid in a public key.  A public key
algorithm that prohibits 0x22 seems unlikely.


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