WS-Security using Cert Authentication with Spring-WS V: How to implement a Message Signing Client

The previous installment set the stage for our WebService Clients’ Security Inftrastucture, that is the Keystore which will provide the Clients private Key in order to build the digital Signature (the encrypted Hash for the messages’ payload) and the related – now signed – Certificate, which will be included within the Request Message (so the receiver – among other things – is able to decrypt the embedded digital Signature in order to compare it with the  Hash rebuilded by himself for the sake of data integrity).