JDK 11 jdk.security.jgss.jmod is the JMOD file for JDK 11 Security Jgss module.

JDK 11 Security JGSS module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.security.jgss.jmod.

JDK 11 Security JGSS module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 Security JGSS module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.security.jgss.

You can click and view the content of each source code file in the list below.

⏎ com/sun/security/jgss/ExtendedGSSCredential.java

/*
 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package com.sun.security.jgss;

import org.ietf.jgss.*;

/**
 * The extended GSSCredential interface for supporting additional
 * functionalities not defined by {@code org.ietf.jgss.GSSCredential}.
 * @since 1.8
 */
public interface ExtendedGSSCredential extends GSSCredential {

    /**
     * Impersonates a principal. In Kerberos, this can be implemented
     * using the Microsoft S4U2self extension.
     * <p>
     * A {@link GSSException#NO_CRED GSSException.NO_CRED} will be thrown if the
     * impersonation fails. A {@link GSSException#FAILURE GSSException.FAILURE}
     * will be  thrown if the impersonation method is not available to this
     * credential object.
     * @param name the name of the principal to impersonate
     * @return a credential for that principal
     * @throws GSSException  containing the following
     * major error codes:
     *   {@link GSSException#NO_CRED GSSException.NO_CRED}
     *   {@link GSSException#FAILURE GSSException.FAILURE}
     */
    public GSSCredential impersonate(GSSName name) throws GSSException;
}

⏎ com/sun/security/jgss/ExtendedGSSCredential.java

Or download all of them as a single archive file:

File name: jdk.security.jgss-11.0.1-src.zip
File size: 21114 bytes
Release date: 2018-11-04
Download 

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