Re: [xml] Possible bug in canonicalization

["Mikhail S Grushinskiy" <mgrushinskiy comcast net>]

Fix has been committed to xmlstarlet CVS.

----- Original Message ----- 
From: "Mikhail S Grushinskiy" <mgrushinskiy comcast net>
To: "Elliotte Harold" <elharo metalab unc edu>; <xml gnome org>
Cc: <xmlstar-devel lists sourceforge net>
Sent: Sunday, February 08, 2004 5:07 PM
Subject: Re: [xml] Possible bug in canonicalization


> Elliotte,
>
> It seems this bug was introduced in xmlstarlet.
>
> mikhail greybox /cygdrive/c/msys/1.0/home/mikhail/XMLSTARLET/libxml2-2.6.5
> $ echo "<xml/>" | xml c14n --with-comments -
> <xml></xml>
> [new line here]
> mikhail greybox /cygdrive/c/msys/1.0/home/mikhail/XMLSTARLET/libxml2-2.6.5
> $ echo "<xml/>" | ./testC14N.exe --with-comments -
> <xml></xml>
> mikhail greybox /cygdrive/c/msys/1.0/home/mikhail/XMLSTARLET/libxml2-2.6.5
>
>
> I will fix it in CVS and I will let you know.
>
> --MG
>
> ----- Original Message ----- 
> From: "Elliotte Harold" <elharo metalab unc edu>
> To: <xml gnome org>
> Cc: <xmlstar-devel lists sourceforge net>
> Sent: Sunday, February 08, 2004 3:51 PM
> Subject: [xml] Possible bug in canonicalization
>
>
> > I've encountered a likely bug in libxml's canonicalization. I am using
> > libxml 2.6.5, the latest released version. I probably don't have the
> > latest release of libxslt, though. This is on Red Hat Linux 8. I am not
> > certain of this bug only because I am only accessing canonicalization
> > through xmlstarlet, rather than through my own code. It is possible the
> > problem is in xmlstarlet's interface to libxml2. However, the nature of
> > the bug does mean that if it's in the libxml code it should be easy to
> > spot. Ditto if it's in xmlstarlet.
> >
> > In brief, the canonicalization is placing a line feed at the end of the
> > canonicalized document, at least when there are no comments or PIs in
> > the epilog (I haven't tested what happens when there are such nodes in
> > the epilog). According to the canonical XML spec, section 4.3, this is
> > wrong:
> >
> > The C14N-20000119
> > <http://www.w3.org/TR/2001/REC-xml-c14n-20010315#C14N-20000119>
> > Canonical XML draft placed a #xA after each PI outside of the document
> > element as well as a #xA after the end tag of the document element. The
> > method in this specification performs the same function except for
> > omitting the final #xA after the last PI (or comment or end tag of the
> > document element). This technique ensures that PI (and comment) children
> > of the root are separated from markup by a line feed even if root node
> > or the document element are omitted from the output node-set.
> >
> > --
> > Elliotte Rusty Harold
> >
> >
> >
> > _______________________________________________
> > xml mailing list, project page  http://xmlsoft.org/
> > xml gnome org
> > http://mail.gnome.org/mailman/listinfo/xml
>
>
> ---
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