Hey hey noone has mentioned CER on this thread yet ?
Isent canonical encoding rules about taking the length encoding freedom out of BER so different applications encode excactly alike ? Is that what you are after, Roberto ? Steen Oluf Karlsen -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of John Larmouth Sent: 16. september 2002 20:26 To: [EMAIL PROTECTED] Subject: Re: [ASN.1] Encoding lenghts... In principle you could do this using Encoding Control Notation, but no-one would want to - that would be a steam-hammer to crack a nut! Why do you want such control? (We are looking at the possibility of encoding instructions for "variant PER" to allow a user (mainly to support legacy protocols) to force a choice index or an enumerated to be more bits than are strictly needed (or used in normal PER). No-one has yet suggested anything useful for encoding instructions for variant BER, but I suppose that control of definite length v indefinite length, where both are possible, may be a candidate.) So I say again, why would you want this? John L Ed Day wrote: > > Hi Roberto, > > There is no way to specify within the syntax whether definite or indefinite > length should be used. The best you can do is add a comment to the spec as > a recommendation as to how you think it should be done and for what reasons. > But any fully compliant decoder should be able to decode it in either form. > It is up to the sender how they want to encode it. > > Regards, > > Ed Day > Objective Systems, Inc. > Tel: +1 (484) 875-3020 > Fax: +1 (484) 875-2913 > Toll-free: (877) 307-6855 (USA only) > mailto:[EMAIL PROTECTED] > http://www.obj-sys.com > > ----- Original Message ----- > From: "Pino Roberto" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Friday, September 13, 2002 6:36 AM > Subject: [ASN.1] Encoding lenghts... > > > I want to specify that my question was not about a particular tool. > > My question was about ASN1 syntax and the existence of the capability to > > force from ASN1 source, in which way encode a structure. Nothing more than > > this. > > Thanks to everybody for yours suggestions. > > Regards, > > Roberto Pino -- Prof John Larmouth Larmouth T&PDS Ltd (Training and Protocol Development Services) 1 Blueberry Road Bowdon [EMAIL PROTECTED] Cheshire WA14 3LS Tel: +44 161 928 1605 England Fax: +44 161 928 8069
