A note on vendor reaction speed to the e=3 problem

James A. Donald jamesd at echeque.com
Fri Sep 15 22:35:08 EDT 2006


     --
Peter Gutmann wrote:
 > > How does [GPG] handle the NULL vs.optional
 > > parameters ambiguity?

David Shaw:
 > GPG generates a new structure for each comparison, so
 > just doesn't include any extra parameters on it.  Any
 > optional parameters on a signature would cause that
 > signature to fail validation.
 >
 > RFC-2440 actually gives the exact bytes to use for the
 > ASN.1 stuff, which nicely cuts down on ambiguity.

This amounts to *not* using ASN.1 - treating the ASN.1
data as mere arbitrary padding bits, devoid of
information content.

     --digsig
          James A. Donald
      6YeGpsZR+nOTh/cGwvITnSR3TdzclVpR0+pr3YYQdkG
      KBZXRF1divvJGZ6Zm3lHv3qjnS9Bwhl22NfSlYK3
      4zPRSIE0Q6qUaTtmKPPoKOsPNzAtcdWuthGi5nNTi

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