With a server application, the application acts as the
request
consumer, and the response generator is deployed and runs in the Java™ Platform,
Enterprise Edition (Java EE)
container. The consumer component
for Web Services Security stores the security tokens that it receives
in the Java Authentication
and Authorization Service (JAAS) Subject of the current thread. You
can retrieve
the security tokens from the JAAS Subject that is maintained as a
local thread
in the container.
About this task
This information
applies only to Java API for XML-based RPC (JAX-RPC)
Web
services.
The security handlers are responsible
for
propagating security tokens. These security tokens are embedded in
the SOAP
security header and passed to downstream servers. The security tokens
are
encapsulated in the implementation classes for the com.ibm.wsspi.wssecurity.auth.token.Token
interface. You can retrieve the security token data from either a
server application
or a client application.
Complete the following
steps
to retrieve the security token data from a server application:
Procedure
- Obtain the JAAS Subject of the current thread using the
WSSubject
utility class.
If
you enable Java 2 Security on the Global security panel in the administrative console, access to the JAAS
Subject is denied if the application code is not granted the
javax.security.auth.AuthPermission("wssecurity.getCallerAsSubject") permission. The following code
example shows how to obtain the JAAS
subject:
javax.security.auth.Subject subj;
try {
subj = com.ibm.websphere.security.auth.WSSubject.getCallerSubject();
} catch (com.ibm.websphere.security.WSSecurityException e) {
…
}
- Obtain a set of private credentials from the Subject.
For
more information, see the application programming interface (API)
com.ibm.websphere.security.auth.WSSubject
class. To access this information, click
Reference > Developer > API Documentation >
Application Programming Interfaces. In the Application Programming
Interfaces
article, click
com.ibm.websphere.security.auth > WSSubject.
Attention: When Java 2
Security is enabled, you might need
to use the AccessController class to avoid a security violation that
is caused
by operating the security objects in the Java EE
container.
The following code sample shows how to set the AccessController class and obtain the private
credentials:
Set s = (Set) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
return subj.getPrivateCredentials();
}
});
- Search the targeting token class
in the private credentials.
You can search the targeting token class by using the java.util.Iterator interface. The
following example shows how to retrieve a username token with a certain token ID value in the
security header. You can also use other method calls to retrieve security tokens. For more
information, see the application programming interface (API) documents for the
com.ibm.wsspi.wssecurity.auth.token.Token interface or custom token
classes.
com.ibm.wsspi.wssecurity.auth.token.UsernameToken unt;
Iterator it = s.iterator();
while (it.hasNext()) {
Object obj = it.next();
if (obj != null &&
obj instanceOf com.ibm.wsspi.wssecurity.auth.token.UsernameToken) {
unt =(com.ibm.wsspi.wssecurity.auth.token.UsernameToken) obj;
if (unt.getId().equals(“…”)) break;
else continue;
}
}
Results
After completing these steps,
you have retrieved the security tokens
from the JAAS Subject in a server application