From: Roland Schmitt <Roland.Schmitt@...>
Date: 2006-10-16T16:42:53+09:00
Subject: Re: Encrypt large files with ruby openssl or ????

Hi,

Damjan Rems schrieb:
> I am sorry. It looks I have been asking wrong questions, because I 
> didn't know how or where to start. And this is basicly all I have got in 
> my directions.
> 
> I need to encript and sign XML document as defined by XML security 
> standards.
> 
> XML Signature Syntax, XML-DSIG, http://www.w3.org/2000/09/xmldsig#
> Digest method, SHA-1, http://www.w3.org/2000/09/xmldsig#sha1
> Signature method, RSA-SHA-1, http://www.w3.org/2000/09/xmldsig#rsa-sha1
> 
> I thought this would be a lot easier.
> 
> by TheR
> 
> 
> 
> 

you can do all the basic cryptographic operations (sign, encrypt, hash) 
with ruby-openssl.
But that is not enough, you also need a xml canonicalizer, defined by
http://www.w3.org/TR/xml-c14n. There is nothing like this in pure ruby.
One idea is using the libxml-ruby-bindings for this 
(http://rubyforge.org/projects/libxml/), as the libxml 
(http://xmlsoft.org/) supports canonicalisation.
Another idea is implementing SWIG-bindings to something like xmlsec 
(http://www.aleksey.com/xmlsec/), which implements the XML security 
standards you refering to.

Regards,
Roland