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. -- Viktor.
