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.
Why and when to perform this task
This task is used to specify that a time stamp embedded in a particular
element and encrypted on the generator side is checked for encryption on the
consumer side. Complete the following steps to specify the time stamp for
confidentiality using an XPath expression 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.
Steps for this task
- Start the assembly tool and click Window > Open Perspective
> J2EE.
- 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 need to configure.
Complete the following steps to locate the client-side extensions:
- Expand the Web Services > Client section and double-click the
name of the Web service.
- Click the WS Extension tab and expand the Response Consumer
Configuration section.
- 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 need to configure. Complete
the following steps to locate the server-side extensions:
- Expand the Web Services > Services section and double-click
the name of the Web service.
- Click the Extensions tab and expand the Request Consumer
Service Configuration Details section.
- Expand the Required Confidentiality section. Confidentiality
refers to encryption while 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.
- Click Add to specify that the element within which a timestamp
is added and encrypted, is checked for confidentiality. The Required
Confidentiality Dialog window is displayed. Complete the following steps to
specify a configuration:
- Specify a name for the confidentiality element in the Required
Confidentiality Name field.
- 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.
- Click Add under the Timestamp section of the Required Confidentiality
Dialog window. Complete the following steps to specify the timestamp
dialect and the message part:
- Select the timestamp dialect from the Timestamp section.
The http://www.w3.org/TR/1999/REC-xpath-19991116 dialect specifies which
message part is verified for encryption using an XPath expression.
- Specify the message part which has an embedded time stamp and
is checked for encryption using an XPath expression in the Timestamp keyword
field. For example, to specify that the bodycontent element along
with the embedded timestamp is checked for encryption, you might add the following
expression in the Timestamp 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()='Bodycontent']
If
you have not specified message parts in Required Confidentiality, you can
click Add in the Message Parts section to add the message parts. You
must define at least one message part in Required Confidentiality to specify
a time stamp in Required Confidentiality.
- Click OK to save the configuration changes.
Note: These
configurations for the consumer and the generator must match.
In
addition to the time stamp, you can specify that the nonce is checked for
encryption. For more information, see the following articles: