Signature authentication method
When using the signature authentication method, the security token
is generated with a <ds:Signature> and a <wsse:BinarySecurityToken>
element.
On the request sender side, a callback handler is invoked to generate the
security token. On the request receiver side, a Java Authentication and Authorization
Service (JAAS) login module is used to validate the security token. These
two operations, token generation and token validation, are described in the
following sections.
- Signature token generation
- The request sender generates a Signature security token using a callback
handler. The security token returned by the callback handler is inserted in
the SOAP message. The callback handler is specified in the <LoginBinding>
element of the bindings file, ibm-webservicesclient-bnd.xmi. WebSphere
Application Server provides the following callback handler implementation
that can be used with the Signature authentication method: com.ibm.wsspi.wssecurity.auth.callback.NonPromptCallbackHandler
You
can add your own callback handlers that implement the javax.security.auth.callback.CallbackHandler
implementation.
- Security token validation
- The request receiver retrieves the Signature security token from the Simple
Object Access Protocol (SOAP) message and validates it using a JAAS login
module. The <ds:Signature> and <wsse:BinarySecurityToken> elements in
the security token are used to perform the validation. If the validation is
successful, the login module returns a Java Authentication and Authorization
Service (JAAS) Subject. This Subject then is set as the identity of the running
thread. If the validation fails, the request is rejected with a SOAP fault
exception.
The JAAS login configuration is specified in the <LoginMapping> element
of the bindings file. Default bindings are specified in the ws-security.xml file.
However, you can override these bindings using the application-specific ibm-webservices-bnd.xmi file.
The configuration information consists of a CallbackHandlerFactory and a ConfigName.
The CallbackHandlerFactory specifies the name of a class that is used for
creating the JAAS CallbackHandler object. WebSphere Application Server provides
the com.ibm.wsspi.wssecurity.auth.callback.WSCallbackHandlerFactoryImp CallbackHandlerFactory
implementation. The ConfigName specifies a JAAS configuration name entry.
WebSphere Application Server searches in the security.xml file for
a matching configuration name entry. If a match is not found, it searches
the wsjaas.conf file. WebSphere Application Server provides the system.wssecurity.Signature
default configuration entry, which is suitable for the signature
authentication method.

Configuring the client for signature authentication: collecting the authentication information
Configuring the client for signature authentication: specifying the method
Securing Web services using signature authentication
Searchable topic ID:
cwbs_authsignature
Last updated: Jun 21, 2007 9:56:50 PM CDT
WebSphere Application Server for z/OS, Version 5.0.2
http://publib.boulder.ibm.com/infocenter/wasinfo/index.jsp?topic=/com.ibm.websphere.zseries.doc/info/zseries/ae/cwbs_authsignature.html