In WebSphere® Application Server Version 6, you can plugin your own implementation. Using extensibility of the <wsse:Security> header in XML-based security tokens, you can directly insert these security tokens into the header. SAML assertions are attached to Web services security messages by placing assertion elements inside the <wsse:Security> header. The following example illustrates a Web services security message with a SAML assertion token.
<S:Envelope xmlns:S="...">
<S:Header>
<wsse:Security xmlns:wsse="...">
<saml:Assertion
MajorVersion="1"
MinorVersion="0"
AssertionID="SecurityToken-ef375268"
Issuer="elliotw1"
IssueInstant="2002-07-23T11:32:05.6228146-07:00"
xmlns:saml="urn:oasis:names:tc:SAML:1.0:assertion">
...
</saml:Assertion>
</wsse:Security>
</S:Header>
<S:Body>
...
</S:Body>
</S:Envelope>
For more information on SAML and XrML, see the WebSphere Application Server online help.