How to retrieve information about certificate in WebServiceTemplate?

I want to retrieve Common Name (CN) property from client certificate in SOAP communication. I'm using Spring WebServiceTemplate to create my webservice endpoint. I have already implemented WS mutual authentication following the example.

Is there any solution to obtain certificate details from client request by means of WebServiceTemplate or some other library?

Fortunately, I have managed to figure it out! Spring WS provides very convenient way to retrieve the X509Certificate.

Normally, You have an endpoint like this:

@Endpoint
public class CountryEndpoint {
    private static final String NAMESPACE_URI = "http://spring.io/guides/gs-producing-web-service";

    ...

    @PayloadRoot(namespace = NAMESPACE_URI, localPart = "getCountryRequest")
    @ResponsePayload
    public GetCountryResponse getCountry(@RequestPayload GetCountryRequest request) {
        //method body here
        return response;
    }
}

However, Spring allows to add additional parameters the method annotated as @PayloadRoot. It can be a MessageContext instance.

public GetCountryResponse getCountry(@RequestPayload MessageContext context, @RequestPayload GetCountryRequest request)`

Then You will be able to obtain the wsse:Security header as follows:

WebServiceMessage webServiceMessageRequest = context.getRequest(); 
SaajSoapMessage saajSoapMessage = (SaajSoapMessage) webServiceMessageRequest;
SOAPMessage doc = saajSoapMessage.getSaajMessage();
Element elem = WSSecurityUtil.getSecurityHeader(doc.getSOAPPart(), "");

Now get the right content of BinarySecurityToken tag:

String binarySecurityToken = elem.getElementsByTagName("BinarySecurityToken").item(0).getTextContent(); 

At the end, you should recreate the X509Certificate by passing binarySecurityToken as its constructor parameter. Later You can extract CN by many different ways for example by means of LDAP utlis.