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| 1 | /* | ||
| 2 | * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.security.ssl; | ||
| 27 | |||
| 28 | import java.security.AccessControlContext; | ||
| 29 | import java.security.AccessController; | ||
| 30 | import java.security.Permission; | ||
| 31 | import java.security.Principal; | ||
| 32 | import java.security.PrivilegedAction; | ||
| 33 | import javax.crypto.SecretKey; | ||
| 34 | import javax.security.auth.Subject; | ||
| 35 | import javax.security.auth.login.LoginException; | ||
| 36 | |||
| 37 | /** | ||
| 38 | * A helper class for Kerberos APIs. | ||
| 39 | */ | ||
| 40 | public final class Krb5Helper { | ||
| 41 | |||
| 42 | private Krb5Helper() { } | ||
| 43 | |||
| 44 | // loads Krb5Proxy implementation class if available | ||
| 45 | private static final String IMPL_CLASS = | ||
| 46 | "sun.security.ssl.krb5.Krb5ProxyImpl"; | ||
| 47 | |||
| 48 | private static final Krb5Proxy proxy = | ||
| 49 | AccessController.doPrivileged(new PrivilegedAction<Krb5Proxy>() { | ||
| 50 | public Krb5Proxy run() { | ||
| 51 | try { | ||
| 52 | Class<?> c = Class.forName(IMPL_CLASS, true, null); | ||
| 53 | return (Krb5Proxy)c.newInstance(); | ||
| 54 | } catch (ClassNotFoundException cnf) { | ||
| 55 | return null; | ||
| 56 | } catch (InstantiationException e) { | ||
| 57 | throw new AssertionError(e); | ||
| 58 | } catch (IllegalAccessException e) { | ||
| 59 | throw new AssertionError(e); | ||
| 60 | } | ||
| 61 | }}); | ||
| 62 | |||
| 63 | /** | ||
| 64 | * Returns true if Kerberos is available. | ||
| 65 | */ | ||
| 66 | public static boolean isAvailable() { | ||
| 67 | return proxy != null; | ||
| 68 | } | ||
| 69 | |||
| 70 | private static void ensureAvailable() { | ||
| 71 | if (proxy == null) | ||
| 72 | throw new AssertionError("Kerberos should have been available"); | ||
| 73 | } | ||
| 74 | |||
| 75 | /** | ||
| 76 | * Returns the Subject associated with client-side of the SSL socket. | ||
| 77 | */ | ||
| 78 | public static Subject getClientSubject(AccessControlContext acc) | ||
| 79 | throws LoginException { | ||
| 80 | ensureAvailable(); | ||
| 81 | return proxy.getClientSubject(acc); | ||
| 82 | } | ||
| 83 | |||
| 84 | /** | ||
| 85 | * Returns the Subject associated with server-side of the SSL socket. | ||
| 86 | */ | ||
| 87 | public static Subject getServerSubject(AccessControlContext acc) | ||
| 88 | throws LoginException { | ||
| 89 | ensureAvailable(); | ||
| 90 | return proxy.getServerSubject(acc); | ||
| 91 | } | ||
| 92 | |||
| 93 | /** | ||
| 94 | * Returns the KerberosKeys for the default server-side principal. | ||
| 95 | */ | ||
| 96 | public static SecretKey[] getServerKeys(AccessControlContext acc) | ||
| 97 | throws LoginException { | ||
| 98 | ensureAvailable(); | ||
| 99 | return proxy.getServerKeys(acc); | ||
| 100 | } | ||
| 101 | |||
| 102 | /** | ||
| 103 | * Returns the server-side principal name associated with the KerberosKey. | ||
| 104 | */ | ||
| 105 | public static String getServerPrincipalName(SecretKey kerberosKey) { | ||
| 106 | ensureAvailable(); | ||
| 107 | return proxy.getServerPrincipalName(kerberosKey); | ||
| 108 | } | ||
| 109 | |||
| 110 | /** | ||
| 111 | * Returns the hostname embedded in the principal name. | ||
| 112 | */ | ||
| 113 | public static String getPrincipalHostName(Principal principal) { | ||
| 114 | ensureAvailable(); | ||
| 115 | return proxy.getPrincipalHostName(principal); | ||
| 116 | } | ||
| 117 | |||
| 118 | /** | ||
| 119 | * Returns a ServicePermission for the principal name and action. | ||
| 120 | */ | ||
| 121 | public static Permission getServicePermission(String principalName, | ||
| 122 | String action) { | ||
| 123 | ensureAvailable(); | ||
| 124 | return proxy.getServicePermission(principalName, action); | ||
| 125 | } | ||
| 126 | } | ||