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<h1 class="topictitle1">Principals and credentials</h1>
<div><p>The identity under which an application engages in JGSS secure
communication with a peer is called a principal. A principal may be a real
user or an unattended service. A principal acquires security mechanism-specific
credentials as proof of identity under that mechanism.</p>
<p>For example, when using the Kerberos mechanism, a principal's credential
is in the form of a ticket-granting ticket (TGT) issued by a Kerberos key
distribution center (KDC). In a multi-mechanism environment, a GSS-API credential
can contain multiple credential elements, each element representing an underlying
mechanism credential. </p>
<p> The GSS-API standard does not prescribe how a principal acquires credentials,
and GSS-API implementations typically do not provide a means for credential
acquisition. A principal obtains credentials before using GSS-API; GSS-API
merely queries the security mechanism for credentials on behalf of the principal. </p>
<p> IBM<sup>®</sup> JGSS
includes Java™ versions of Kerberos credential management tools <a href="rzahajgssknit.htm#rzahajgssknit">com.ibm.security.krb5.internal.tools Class Kinit</a>, <a href="rzahajgssktab.htm#rzahajgssktab">com.ibm.security.krb5.internal.tools Class Ktab</a>, and <a href="rzahajgssklst.htm#klsttest">com.ibm.security.krb5.internal.tools Class Klist</a>. Additionally, IBM JGSS enhances the standard GSS-API by
providing an optional Kerberos login interface that uses JAAS. The pure Java JGSS
provider supports the optional login interface; the native iSeries™ provider
does not. For more information, see the following topics:</p>
<ul><li><a href="rzahajgssusejaas.htm">Obtaining Kerberos credentials</a></li>
<li><a href="rzahajgsscfg15.htm">JGSS providers</a></li>
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<li class="ulchildlink"><strong><a href="rzahajgssklst.htm">com.ibm.security.krb5.internal.tools Class Klist</a></strong><br />
This class can execute as a command-line tool to list entries in credential cache and key tab.</li>
<li class="ulchildlink"><strong><a href="rzahajgssknit.htm">com.ibm.security.krb5.internal.tools Class Kinit</a></strong><br />
Kinit tool for obtaining Kerberos v5 tickets.</li>
<li class="ulchildlink"><strong><a href="rzahajgssktab.htm">com.ibm.security.krb5.internal.tools Class Ktab</a></strong><br />
This class can execute as a command-line tool to help the user manage entires in the key table. Available functions include list/add/update/delete service key(s).</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzahajgssconcept.htm" title="JGSS operations consist of four distinct stages, as standardized by the Generic Security Service Application Programming Interface (GSS-API).">JGSS concepts</a></div>
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