changing OpenSAML namespace prefix

[Jeff Ott]

I am using Java OpenSAML 2.5.2 to generate a SAML response, and I'm 
getting a Response prefix of saml1p (and the Assertion and enclosing 
sections have a saml1 prefix).  I'm hoping to change both the saml1p and 
saml1 prefixes to be samlp, since a vendor I'm working with believes 
their server might not be accepting the saml1p/saml1 combination for 
some reason.  This is some of the (hopefully relevant) code

import org.opensaml.Configuration;
import org.opensaml.DefaultBootstrap;
import org.opensaml.common.SAMLObjectBuilder;
import org.opensaml.common.SAMLVersion;
import org.opensaml.common.impl.SecureRandomIdentifierGenerator;
import org.opensaml.saml1.core.Assertion;
import org.opensaml.saml1.core.Response;
import org.opensaml.saml1.core.impl.ResponseBuilder;
import org.opensaml.saml1.core.impl.ResponseMarshaller;
import org.opensaml.xml.XMLObjectBuilder;
import org.opensaml.xml.XMLObjectBuilderFactory;
import org.w3c.dom.Element;

public class SamlBuilder {

     private static XMLObjectBuilderFactory builderFactory;
     private static SecureRandomIdentifierGenerator generator;

     static {
         try {
             DefaultBootstrap.bootstrap();
             builderFactory = Configuration.getBuilderFactory();
             generator = new SecureRandomIdentifierGenerator();

         } catch (ConfigurationException e) {
             new AccountUtilsLogger().error("unexpected exception", e);

         } catch (NoSuchAlgorithmException e) {
             new AccountUtilsLogger().error("unexpected exception", e);
         }
     }

     public String buildSaml() {
         ResponseBuilder responseBuilder = (ResponseBuilder) 
builderFactory.getBuilder(Response.DEFAULT_ELEMENT_NAME);
         Response authResponse = responseBuilder.buildObject();
...
         SAMLObjectBuilder<?> assertionBuilder = (SAMLObjectBuilder<?>) 
builderFactory.getBuilder(Assertion.DEFAULT_ELEMENT_NAME);
         Assertion assertion = (Assertion) assertionBuilder.buildObject();
...
         authResponse.getAssertions().add(assertion);
...
         Element element = new ResponseMarshaller().marshall(authResponse);
...
     }
}

and the resulting Response looks something like this

<?xml version="1.0" encoding="UTF-8"?><saml1p:Response 
xmlns:saml1p="urn:oasis:names:tc:SAML:1.0:protocol" 
IssueInstant="2012-03-28T22:15:25.367Z" MajorVersion="1" 
MinorVersion="1" 
ResponseID="_c8891aaad0161d2f9e021f094e65267a"><saml1p:Status><saml1p:StatusCode 
Value="saml1p:Success"/></saml1p:Status><saml1:Assertion 
xmlns:saml1="urn:oasis:names:tc:SAML:1.0:assertion" 
AssertionID="_e1b3737432f1a639d908f24524c76d90" 
IssueInstant="2012-03-28T22:15:25.367Z" 
Issuer="https://www.purdue.edu/apps/account" MajorVersion="1" 
MinorVersion="0"><saml1:Conditions NotBefore="2012-03-28T22:15:23.367Z" 
NotOnOrAfter="2012-03-28T22:15:28.367Z"/><saml1:AuthenticationStatement 
AuthenticationInstant="2012-03-28T22:15:25.367Z" 
AuthenticationMethod="urn:oasis:names:tc:SAML:1.0:am:password"><saml1:Subject><saml1:NameIdentifier 
Format="urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress">someone at purdue.edu</saml1:NameIdentifier><saml1:SubjectConfirmation><saml1:ConfirmationMethod>urn:oasis:names:tc:SAML:1.0:cm:bearer</saml1:ConfirmationMethod></saml1:SubjectConfirmation></saml1:Subject></saml1:AuthenticationStatement><saml1:AttributeStatement/></saml1:Assertion></saml1p:Response>

I am hoping someone can point me in the right direction for what code 
changes to make, I'm not succeeding at figuring it out so far.  I 
appreciate the efforts of those who have developed and supported the 
OpenSAML library, thanks for those efforts, and for your time in reading 
this!

Jeff