OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help



   Re: [xml-dev] Pushing all the buttons

[ Lists Home | Date Index | Thread Index ]

On Monday, Sep 22, 2003, at 11:57 US/Eastern, Rich Salz wrote:

>> For the record, there's nothing Java specific about the encoding. 
>> Data is encoded using ASN.1 Packed Encoding Rules (PER). ASN.1 was 
>> around long before Java, PER is not based on Java serialization. I 
>> would expect a C based ASN.1 PER library to perform as well as a Java 
>> equivalent.
> Do you force byte alignment within the PER message?
All our tests have been with aligned PER.

> This will be comical when using crypto in XML, DER->base64->PER.  :)
> Why not use DER?  Hand-coded (or probably more accurately, 
> IDL-compiler-generated) parser could just skip the tags, in most cases 
> the lengths would be single-byte, and you'd get better interop.  Seems 
> like that's closer to the 80/20.
Most of the work is involved in the XSD->ASN.1 mapping, substituting an 
alternate encoding (e.g. DER instead of PER) would be fairly 
straightforward. That said, all of our tests have used PER so I 
couldn't comment on the performance impact of switching to DER.


Marc Hadley <marc.hadley@sun.com>
Web Technologies and Standards, Sun Microsystems.


News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 2001 XML.org. This site is hosted by OASIS