Encrypting message elements in consumer security constraints with an XPath expression

Before you begin

Prior to completing this task, you must import your application into an assembly tool.

For information on how to import your application, see Importing enterprise applications.

The following information explains the difference between using an XPath expression and using keywords to specify which part of the message to sign:
XPath expression
Specify any part of the message using an XPath expression. XPath is a language that is used to address parts of an XML document. You can find information on XPath syntax at the following Web site: http://www.w3.org/TR/1999/REC-xpath-19991116.
Keywords
Specify only elements within the message using predefined keywords.

About this task

Complete the following steps to specify which message parts to check for encryption when you configure the consumer security constraints for either the response consumer or the request consumer. The response consumer is configured for the client and the request consumer is configured for the server. In the following steps, you must configure either the client-side extensions in step 2 or the server-side extensions in step 3.

Procedure

  1. Start the assembly tool.
  2. Switch to the Java 2 Platform, Enterprise Edition (J2EE) perspective. Click Window > Open Perspective > J2EE.
  3. Optional: Locate the client-side extensions using the Project Explorer window. The Client Deployment Descriptor window is displayed. This Web service contains the extensions that you must configure. Complete the following steps to locate the client-side extensions:
    1. Expand the Web Services > Client section and double-click the name of the Web service.
    2. Click the WS Extension tab and expand the Response Consumer Configuration section.
  4. Optional: Locate the server-side extensions using the Project Explorer window. The Web Services Editor window is displayed. This Web service contains the extensions that you must configure. Complete the following steps to locate the server-side extensions:
    1. Expand the Web Services > Services section and double-click the name of the Web service.
    2. Click the Extensions tab and expand the Request Consumer Service Configuration Details section.
  5. Expand the Required Confidentiality section. Confidentiality refers to encryption and integrity refers to digital signing. Confidentiality reduces the risk of someone intercepting the message as it moves across a network. With confidentiality specifications, the message is encrypted before it is sent and decrypted when it is received at the intended target. For more information on encryption, see XML encryption.
  6. Click Add to specify which parts of the message to check for encryption. The Required Confidentiality Dialog window is displayed. Complete the following steps to specify a configuration:
    1. Specify a name for the confidentiality element in the Required Confidentiality Name field.
    2. Specify a usage type in the Usage type field. This field specifies the requirement for the confidentiality element. The value of this attribute is either Required or Optional.
  7. Click Add under the Message parts section of the Required Confidentiality Dialog window. Complete the following steps to specify the message part and its associated message parts dialect:
    1. Select the message parts dialect from the Message parts section. The http://www.w3.org/TR/1999/REC-xpath-19991116 dialect specifies which message part is checked for encryption using an XPath expression.
    2. Specify the message part to be checked for encryption using an XPath expression in the Message parts keyword field. For example, to specify that the body is checked for encryption, you might add the following expression in the Message parts keyword field as one continuous line:
      /*[namespace-uri()='http://schemas.xmlsoap.org/soap/envelope/' 
      and local-name()='Envelope']/*[namespace-uri()='http://schemas.xmlsoap.org/
      soap/envelope/' and local-name()='Body']
    Note: These configurations for the consumer and the generator must match.
  8. Click OK to save your configuration.

What to do next

After you specify which message parts to check for encryption, you must specify which method is used to verify the encryption of the message parts. For more information, see Configuring encryption information for the consumer binding with an assembly tool.



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Last updated: Sep 20, 2010 9:00:59 PM CDT
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