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<h6><a name="wsseccfidautcl"></a>Configure identity assertion authentication for a Web services
client</h6>
<p>This task is used to configure identity assertion authentication. The purpose of identity assertion
is to assert the authenticated identity of the originating client from a Web service to a downstream
Web service. Do not attempt to configure identity assertion from a pure client. Identity assertion
works only when you configure on the client-side of a Web service acting as a client to a downstream
Web service.</p>
<p>In order for the downstream Web service to accept the identity of the originating client (just the
user name), you must supply a special trusted BasicAuth credential that the downstream Web service
trusts and can authenticate successfully. You must specify the user ID of the special BasicAuth
credential in a trusted ID evaluator on the downstream Web service configuration. For more information
on trusted ID evaluators, see <a href="wssectrustid.htm">Trusted ID evaluators</a>.</p>
<p>Perform the following steps in the WebSphere Development Studio Client for iSeries to specify
identity assertion authentication for your Web services client:</p>
<ol>
<li><p>Open the webservicesclient.xml file in the Web Services Client Editor of the WebSphere
Development Studio Client for iSeries. For more information, see <a href="astk.htm">Configure your Web
services application</a>.</p></li>
<li><p>Click the <strong>Security Extensions</strong> tab.</p></li>
<li><p>Expand the <strong>Request Sender Configuration --&gt; Login Config</strong> settings.</p></li>
<li><p>Select <strong>IDAssertion</strong> as the authentication method.</p></li>
<li><p>Expand the <strong>Identity Assertion</strong> section.</p></li>
<li><p>For the <strong>ID Type</strong>, select <strong>Username</strong>. This works with all registry
types and originating authentication methods.</p></li>
<li><p>For the <strong>Trust Mode</strong>, select either <strong>BasicAuth</strong> or
<strong>Signature</strong>.</p>
<ul>
<li><p>If you select <strong>BasicAuth</strong>, you must include basic authentication information
(user ID and password), which the downstream Web service has specified in the trusted ID evaluator as a
trusted user ID. You specify the user ID and password information later, on the <strong>Port
Binding</strong> tab.</p></li>
<li><p>If you select <strong>Signature</strong>, the certificate configured in the <strong>Signature
Information</strong> section used to sign the data also is used as the trusted subject. The Signature
is used to create a credential and the user ID, which the certificate mapped to the downstream
registry, is used in the trusted ID evaluator as a trusted user ID.</p></li>
</ul></li>
<li><p>Save the file.</p></li>
</ol>
<p>Next, perform the following steps with the Web Services Client Editor to specify how the identity
assertion informatino is collected:</p>
<ol>
<li><p>Click the <strong>Port Binding</strong> tab.</p></li>
<li><p>Expand the <strong>Security Request Sender Binding Configuration --&gt; Login Binding</strong>
settings.</p></li>
<li><p>Click <strong>Edit</strong> to view the login binding information and select
<strong>IDAssertion</strong>. The login binding dialog displays.</p></li>
<li><p>Select or enter the following information:</p>
<table border="1" cellpadding="3" cellspacing="0">
<tr>
<th>Name</th>
<th>Purpose</th>
</tr>
<tr>
<td><strong>Authentication method</strong></td>
<td>The authentication method specifies the type of authentication that occurs. Select
<strong>IDAssertion</strong> to use identity assertion.</td>
</tr>
<tr>
<td><strong>Token value type URI</strong> and <strong>Token value type Local name</strong></td>
<td>When you select IDAssertion, you cannot edit the token value type URI and the local name. These
values are specifically for custom authentication types. For IDAssertion authentication, you do not
need to enter any information.</td>
</tr>
<tr>
<td><strong>Callback handler</strong></td>
<td>The callback handler specifies the Java Authentication and Authorization Service (JAAS) callback
handler implementation for collecting the BasicAuth information. Specify the
<code>com.ibm.wsspi.wssecurity.auth.callback.<br>NonPromptCallbackHandler</code> implementation for
IDAssertion.</td>
</tr>
<tr>
<td><strong>Basic authentication User ID</strong> and <strong>Basic authentication
Password</strong></td>
<td>If the trust mode entered in the extensions is BasicAuth, you must specify the trusted user ID and
password in these fields. The user ID specified must be an ID that is trusted by the downstream Web
service. The Web service trusts the user ID if it is entered as a trusted ID in a trusted ID evaluator
in the downstream Web service bindings. If the trust mode entered in the extensions is Signature, you
do not need to specify any information in this field.</td>
</tr>
<tr>
<td><strong>Property Name</strong> and <strong>Property Value</strong></td>
<td>This field enables you to enter properties and name and value pairs, for use by custom callback
handlers. For IDAssertion, you do not need to specify any information in this field.</td>
</tr>
</table><p></p></li>
<li><p>Save the file.</p></li>
</ol>
<p><strong>Note: </strong>Examples may be wrapped for display purposes.</p>
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