Canonicalization software

XML Canonicalizer from IBM's XML Security Suite:

• http://www.alphaworks.ibm.com/tech/xmlsecuritysuite

• c14n.C14nDOM reads an XML document from stdin and writes the canonicalized output to stdout:

  % java c14n.C14nDOM -xpath < hotcop.xml > canonicalized_hotcop.xml

• -xpath option necessary to support the final draft of Canonical XML 1.0.

• API in com.ibm.xml.dsig.Canonicalizer

  package com.ibm.xml.dsig;
  
  public interface Canonicalizer {
  
    public static final String W3C 
     = "http://www.w3.org/TR/2000/WD-xml-c14n-20000119"
    public static final java.lang.String W3C2 
     = "http://www.w3.org/TR/2001/REC-xml-c14n-20010315"
    public static final java.lang.String W3C2WC 
     = "http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments"
    public static final java.lang.String EXCLUSIVE;
    public static final java.lang.String EXCLUSIVEWC;
  
    public String getURI();
    public void canonicalize(org.w3c.dom.Node node, OutputStream stream)
     throws IOException;
  
  }

• Implementations include:

  • com.ibm.xml.dsig.transform.ExclusiveC11r

  • com.ibm.xml.dsig.transform.ExclusiveC11rWC

  • com.ibm.xml.dsig.transform.W3CCanonicalizer

  • com.ibm.xml.dsig.transform.W3CCanonicalizer2

  • com.ibm.xml.dsig.transform.W3CCanonicalizer2WC

  All can be created with no-args constructors

Apache XML Security Suite

• http://xml.apache.org/security/

• CVS only; won't build

A standard feature for DOM level 3's DOMWriter

• http://www.w3.org/TR/DOM-Level-3-ASLS/load-save.html#LS-Interfaces-DOMWriter