| /* |
| * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.security.ssl; |
| |
| import java.security.AccessControlContext; |
| import java.security.AccessController; |
| import java.security.Permission; |
| import java.security.Principal; |
| import java.security.PrivilegedAction; |
| import javax.crypto.SecretKey; |
| import javax.security.auth.Subject; |
| import javax.security.auth.login.LoginException; |
| |
| /** |
| * A helper class for Kerberos APIs. |
| */ |
| public final class Krb5Helper { |
| |
| private Krb5Helper() { } |
| |
| // loads Krb5Proxy implementation class if available |
| private static final String IMPL_CLASS = |
| "sun.security.ssl.krb5.Krb5ProxyImpl"; |
| |
| private static final Krb5Proxy proxy = |
| AccessController.doPrivileged(new PrivilegedAction<Krb5Proxy>() { |
| public Krb5Proxy run() { |
| try { |
| Class<?> c = Class.forName(IMPL_CLASS, true, null); |
| return (Krb5Proxy)c.newInstance(); |
| } catch (ClassNotFoundException cnf) { |
| return null; |
| } catch (InstantiationException e) { |
| throw new AssertionError(e); |
| } catch (IllegalAccessException e) { |
| throw new AssertionError(e); |
| } |
| }}); |
| |
| /** |
| * Returns true if Kerberos is available. |
| */ |
| public static boolean isAvailable() { |
| return proxy != null; |
| } |
| |
| private static void ensureAvailable() { |
| if (proxy == null) |
| throw new AssertionError("Kerberos should have been available"); |
| } |
| |
| /** |
| * Returns the Subject associated with client-side of the SSL socket. |
| */ |
| public static Subject getClientSubject(AccessControlContext acc) |
| throws LoginException { |
| ensureAvailable(); |
| return proxy.getClientSubject(acc); |
| } |
| |
| /** |
| * Returns the Subject associated with server-side of the SSL socket. |
| */ |
| public static Subject getServerSubject(AccessControlContext acc) |
| throws LoginException { |
| ensureAvailable(); |
| return proxy.getServerSubject(acc); |
| } |
| |
| /** |
| * Returns the KerberosKeys for the default server-side principal. |
| */ |
| public static SecretKey[] getServerKeys(AccessControlContext acc) |
| throws LoginException { |
| ensureAvailable(); |
| return proxy.getServerKeys(acc); |
| } |
| |
| /** |
| * Returns the server-side principal name associated with the KerberosKey. |
| */ |
| public static String getServerPrincipalName(SecretKey kerberosKey) { |
| ensureAvailable(); |
| return proxy.getServerPrincipalName(kerberosKey); |
| } |
| |
| /** |
| * Returns the hostname embedded in the principal name. |
| */ |
| public static String getPrincipalHostName(Principal principal) { |
| ensureAvailable(); |
| return proxy.getPrincipalHostName(principal); |
| } |
| |
| /** |
| * Returns a ServicePermission for the principal name and action. |
| */ |
| public static Permission getServicePermission(String principalName, |
| String action) { |
| ensureAvailable(); |
| return proxy.getServicePermission(principalName, action); |
| } |
| } |