Decrypting Message with a Spring Web Service Client

Question

350 Bounty and waffles to the person who can help me!

I have been struggling with Spring Web Service encryption for days and I can't figure out how to get Spring's encryption on the message body to work. Whenever I have the server encrypt the resulting message the client doesn't seem to be decrypting it before it attempts to validate it against the Schema (XSD).

Here is the server side configuration

The server's xwss security configuration

The client's Spring configuration

Client's xwss configuration

What I can do is encrypt the user token and decrypt it successfully. I do that when sending data from the client to the server. The server then decrypts the user token and authenticates the user credentials, that works quite well.

The problem occurs if I try and encrypt the body of the message coming back. The issue occurs on the client side. It seems the client is trying to validate the message before it decrypts it, and hence an error occurs when validating against the schema.

[Fatal Error] :1:192: The prefix "ns0" for element "ns0:HolidayListResponse" is not bound.
11-Dec-2009 7:45:32 AM com.sun.xml.wss.impl.apachecrypto.DecryptionProcessor decryptElementWithCipher
SEVERE: WSS1203: Exception [ The prefix "ns0" for element "ns0:HolidayListResponse" is not bound. ] while trying to decrypt message

And here is the SOAP response itself.

And here is the marshalling mapping file

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapping PUBLIC "-//EXOLAB/Castor Mapping DTD Version 1.0//EN"
                         "http://castor.org/mapping.dtd">
<mapping>
    <field-handler name="dateHandler" class="com.mycompany.hr.handlers.DateFieldHandler" />
    <field-handler name="dateHandler2" class="com.mycompany.hr.handlers.DateFieldHandler" />
    <class name="com.mycompany.hr.data.Holiday">
        <map-to ns-uri="http://mycompany.com/hr/schemas" ns-prefix="ns0" xml="Holiday" />
        <field name="from" type="string" handler="dateHandler">
            <bind-xml name="StartDate" node="element" />
        </field>
        <field name="to" type="string" handler="dateHandler2">
            <bind-xml name="EndDate" node="element" />
        </field>
    </class>
    <class name="com.mycompany.hr.data.Employee">
        <map-to ns-uri="http://mycompany.com/hr/schemas" ns-prefix="ns0" xml="Employee" />
        <field name="number" type="java.lang.Integer">
            <bind-xml name="Number" node="element" />
        </field>
        <field name="firstName" type="java.lang.String">
            <bind-xml name="FirstName" node="element" />
        </field>
        <field name="lastName" type="java.lang.String">
            <bind-xml name="LastName" node="element" />
        </field>
    </class>
    <class name="com.mycompany.hr.data.HolidayRequest">
        <map-to ns-uri="http://mycompany.com/hr/schemas" ns-prefix="ns0" xml="HolidayRequest" />
        <field name="holiday" type="com.mycompany.hr.data.Holiday">
            <bind-xml name="Holiday" node="element" />
        </field>
        <field name="employee" type="com.mycompany.hr.data.Employee">
            <bind-xml name="Employee" node="element" />
        </field>
    </class>

    <class name="com.mycompany.hr.data.HolidayConfirmation">
        <map-to ns-uri="http://mycompany.com/hr/schemas" ns-prefix="ns0" xml="HolidayConfirmation" />
        <field name="confirmationCode" type="java.lang.Integer">
            <bind-xml name="ConfirmationCode" node="element" />
        </field>
        <field name="confirmationMessage" type="java.lang.String">
            <bind-xml name="ConfirmationMessage" node="element" />
        </field>
    </class>

    <class name="com.mycompany.hr.data.HolidayResponse">
        <map-to ns-uri="http://mycompany.com/hr/schemas" ns-prefix="ns0" xml="HolidayResponse" />
        <field name="confirmation" type="com.mycompany.hr.data.HolidayConfirmation">
            <bind-xml name="HolidayConfirmation" node="element" />
        </field>
    </class>
    <class name="com.mycompany.hr.data.HolidayListRequest">
        <map-to ns-uri="http://mycompany.com/hr/schemas" ns-prefix="ns0" xml="HolidayListRequest" />
        <field name="id" type="java.lang.Integer">
            <bind-xml name="userId" node="element" />
        </field>
    </class>
    <class name="com.mycompany.hr.data.HolidayListResponse">
        <map-to ns-uri="http://mycompany.com/hr/schemas" ns-prefix="ns0" xml="HolidayListResponse" />
        <field name="holidays" type="com.mycompany.hr.data.Holiday" collection="vector">
            <bind-xml name="Holiday" node="element" />
        </field>
    </class>
</mapping>

I know it's a lot of information, but I figured I would provide everything. Is my encryption setup correct? Is it not possible encrypt the body of the message and decrypt it on the client side? At this point I am open to almost any suggestion.

Answer 1

Take a look at CastorMarshaller properties, and attempt setting some of the "ignoring" ones to true (in your <bean id="castorMarshaller"). For example set:

<property name="validating" value="false" />
<property name="suppressNamespaces" value="true" />
<property name="ignoreExtraElements" value="true" />

One of those might do it.

Answer 2

Are you certain

 <property name="xsd" value="classpath:src/java/hr.xsd"/>

is being resolved properly?

The error you're getting indicates it can't find how to handle that element. You wouldn't be seeing the element name and prefix if the response wasn't getting decrypted.

Are you able to validate and run the web service without encryption?