Hi Andrei,
Sample code in GitHub will be great. My scenario is to have dynamic
policy changes and keystore config. Static Dispatch client is simply not
that impressive.
Thanks,
Sam
On 29/10/2013 3:21 a.m., Andrei Shakirin wrote:
Hi,
1. Applying WS-Policy to Dispatcher client dynamically.
The question is it really required in your scenario that Dispatcher client
should dynamically react on policy changes between the calls.
If no, you could try to avoid setting policy via interceptor through
POLICY_OVERRIDE message property
(http://cxf.547215.n5.nabble.com/Dynamicall-y-define-WS-Policy-in-CXF-td5713085.html).
It will be enough to set policy in the Dispatch client statically.
If yes, than own interceptor and POLICY_OVERRIDE message property will be
only the solution.
2. Config of encryption & signing dynamically at runtime
Yes, doing that through Crypto provider is a right way, you can also look
how it is implemented in XKMS service
(https://svn.apache.org/repos/asf/cxf/trunk/services/xkms/xkms-client/src/main/java/org/apache/cxf/xkms/crypto/impl/XkmsCryptoProvider.java
) and considerate to reuse XKMS service
(http://ashakirin.blogspot.de/2013/04/cxf-security-getting-certificates-from.html).
Both solutions dynamic policy mechanism and custom crypto provider are working
in some projects I was involved.
If you like, I could distil the code, publish it on the GitHub and reference
from my blog.
Regards,
Andrei.
-----Original Message-----
From: Sam [mailto:[email protected]]
Sent: Sonntag, 27. Oktober 2013 13:40
To: [email protected]
Subject: Dynamically define WS-Policy for web service client by using
Dispatcher and interceptor
Hi all,
I am trying to implement a web service client that can send soap request with
plain xml string to a web service with WS-Security and apply WS-Policy to
client at runtime. From what I read, using Dispatcher with interceptor (which
loads WS-Policy) is the way to go.
Just to show I have done my home work:
* This thread
http://cxf.547215.n5.nabble.com/Dynamicall-y-define-WS-Policy-in-CXF-
td5713085.html
outlines the interceptor approach to load WS-Policy
* This thread
http://cxf.547215.n5.nabble.com/adding-interceptors-to-a-dynamic-jax-ws-
dispatcher-client-td5723001.html
seems to confirm interceptor can be dynamically added to a Dispatcher client
* So I look for sample code of using Dispatcher and find /apache-cxf-2.7.6-
src/distribution/src/main/release/samples/in_jvm_transport/src/main/java/
demo/colocated/client/DispatchSourceClient.java.
Got it to work by sending plain text request to the sample DoubleIt web
service without any ws-policy.
* Then it dawned on me that I have no idea how the imported WS-Policy can
be applied to a WSDL that has no WS-Policy, after some googling, I believe
the imported WSDL needs to have format specified in
http://www.w3.org/Submission/WS-PolicyAttachment/
* Next question that came up is how to apply config of encryption & signing
dynamically at runtime. Since it needs to be dynamic, I ruled out using Spring
XML config.
After some googling, I found this excellent blog
http://ashakirin.blogspot.co.nz/2013/04/cxf-security-getting-certificates-
from.html
which shows Crypto provider object can be programmatically
set in interceptor, i.e.
public class CustomSecurityInterceptor extends
AbstractPhaseInterceptor<Message> {
public CustomSecurityInterceptor () {
super(Phase.PRE_LOGICAL);
}
@Override
public void handleMessage(Message message) throws Fault {
PKICryptoProvider pkiCryptoProvider = new
PKICryptoProvider();
message.put(SecurityConstants.ENCRYPTION_CRYPTO,
pkiCryptoProvider);
message.put(SecurityConstants.SIGNATURE_CRYPTO,
pkiCryptoProvider);
}
I am assuming this can provide the missing link of configuring keystore config
at runtime. Correct me if wrong.
Right now, my half baked non-working prototype interceptor is
import ...
public class DynamicWSPolicyOutInterceptor extends
AbstractPolicyInterceptor {
public DynamicWSPolicyOutInterceptor() {
super(
InterceptorIdConstants.DYNAMIC_WS_POLICY_OUT_INTERCEPTOR_ID,
Phase.SETUP);
getBefore().add( PolicyOutInterceptor.class.getName() );
}
@Override
protected void handle(Message message) throws PolicyException {
try {
// this will get test WS-Policy data
PolicyUtil policyUtil = new PolicyUtil();
// 1. Build effective policy for response
PolicyBuilder builder =
message.getExchange().getBus().getExtension(PolicyBuilder.class);
Policy effectivePolicy = builder.getPolicy(
policyUtil.getTestPolicyData() ) ;
// 2. Apply effective policy
message.put( PolicyConstants.POLICY_OVERRIDE,
effectivePolicy );
// 3. Apply keystore config like
http://ashakirin.blogspot.co.nz/2013/04/cxf-security-getting-certificates-
from.html
// TODO!!
} catch (Exception e) {
throw new PolicyException( e );
e.printStackTrace();
// logging latter
}
}
}
Now the working PolicyUtil is:
import ...
import org.apache.cxf.helpers.IOUtils;
public class PolicyUtil {
// load test data policy file
private InputStream in =
this.getClass().getResourceAsStream("/ws_policy/ws_policy_1");
InputStream getTestPolicyData() {
return in;
}
public static void main(String args[]) throws Exception {
PolicyUtil policyUtil = new PolicyUtil();
String wsPolicy =
IOUtils.toString(policyUtil.getTestPolicyData(), "UTF-8");
System.out.println( wsPolicy ); // OK
}
}
As you can see, it's like playing a painful jig-saw puzzle, so my ultimate
question is, has anyone done something this like already and care to share
sample code?
This can save me or anyone else a lot of pain. :)
If sample code is not possible, then can you at least confirm if I am still in
the
right direction and if there is still any road blocks I haven't hit my head into
the wall yet?
Thanks
Regards,
Sam
