Re: ERS tagging

[Peter Sylvester <Peter.Sylvester@xxxxxxxxxx>]

Carl Wallace wrote:
> > -----Original Message-----
> > From: Peter Sylvester [mailto:Peter.Sylvester@xxxxxxxxxx] 
> > Subject: Re: ERS tagging
> >
> > I don't think that Carl's conclusion to add EXPLICIT is the 
> > right way to remove the confusion. It changes the encoding. 
> > In order to avoid any confusion one can add IMPLICIT. This 
> > would be redundant but legal.
> >     
>
> Redundantly tagging with IMPLICIT is fine with me.  I'll try compiling a
> module with IMPLICIT in the definition instead of EXPLICIT.  I'd still
> prefer to see the structures refactored a bit for readability.
>  
>   
> > In any case the syntax is still ambiguous.
> >     
>
> What about the syntax is ambiguous?
>   
There was a missing tag at timeStamp. You could not distinguish it from
digestAlgorithm.

 ArchiveTimeStamp ::= SEQUENCE {
   digestAlgorithm    AlgorithmIdentifier OPTIONAL,
   reducedHashtree   [0] IMPLICIT SEQUENCE OF SEQUENCE OF OCTET STRING
                                                       OPTIONAL,

   timeStamp         [1] IMPLICIT ContentInfo}


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