| /* |
| * Copyright (c) 2008, 2016, 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. |
| * |
| * 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. |
| */ |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.security.Security; |
| import java.util.Locale; |
| import javax.security.auth.callback.Callback; |
| import javax.security.auth.callback.CallbackHandler; |
| import javax.security.auth.callback.NameCallback; |
| import javax.security.auth.callback.PasswordCallback; |
| import sun.security.krb5.Config; |
| |
| /** |
| * This class starts a simple KDC with one realm, several typical principal |
| * names, generates delete-on-exit krb5.conf and keytab files, and setup |
| * system properties for them. There's also a helper method to generate a |
| * JAAS login config file that can be used for JAAS or JGSS apps. |
| * <p> |
| * Just call this line to start everything: |
| * <pre> |
| * new OneKDC(null).writeJaasConf(); |
| * </pre> |
| */ |
| public class OneKDC extends KDC { |
| |
| public static final String USER = "dummy"; |
| public static final char[] PASS = "bogus".toCharArray(); |
| public static final String USER2 = "foo"; |
| public static final char[] PASS2 = "bar".toCharArray(); |
| public static final String KRB5_CONF = "localkdc-krb5.conf"; |
| public static final String KTAB = "localkdc.ktab"; |
| public static final String JAAS_CONF = "localkdc-jaas.conf"; |
| public static final String REALM = "RABBIT.HOLE"; |
| public static final String REALM_LOWER_CASE = REALM.toLowerCase(Locale.US); |
| public static String SERVER = "server/host." + REALM_LOWER_CASE; |
| public static String BACKEND = "backend/host." + REALM_LOWER_CASE; |
| public static String KDCHOST = "kdc." + REALM_LOWER_CASE; |
| /** |
| * Creates the KDC and starts it. |
| * @param etype Encryption type, null if not specified |
| * @throws java.lang.Exception if there's anything wrong |
| */ |
| public OneKDC(String etype) throws Exception { |
| super(REALM, KDCHOST, 0, true); |
| addPrincipal(USER, PASS); |
| addPrincipal(USER2, PASS2); |
| addPrincipalRandKey("krbtgt/" + REALM); |
| addPrincipalRandKey(SERVER); |
| addPrincipalRandKey(BACKEND); |
| |
| String extraConfig = ""; |
| if (etype != null) { |
| extraConfig += "default_tkt_enctypes=" + etype |
| + "\ndefault_tgs_enctypes=" + etype; |
| if (etype.startsWith("des")) { |
| extraConfig += "\nallow_weak_crypto = true"; |
| } |
| } |
| KDC.saveConfig(KRB5_CONF, this, |
| "forwardable = true", |
| "default_keytab_name = " + KTAB, |
| extraConfig); |
| System.setProperty("java.security.krb5.conf", KRB5_CONF); |
| // Whatever krb5.conf had been loaded before, we reload ours now. |
| Config.refresh(); |
| |
| writeKtab(KTAB); |
| Security.setProperty("auth.login.defaultCallbackHandler", |
| "OneKDC$CallbackForClient"); |
| } |
| |
| /** |
| * Writes a JAAS login config file, which contains as many as useful |
| * entries, including JGSS style initiator/acceptor and normal JAAS |
| * entries with names using existing OneKDC principals. |
| * @throws java.lang.Exception if anything goes wrong |
| */ |
| public OneKDC writeJAASConf() throws IOException { |
| System.setProperty("java.security.auth.login.config", JAAS_CONF); |
| File f = new File(JAAS_CONF); |
| FileOutputStream fos = new FileOutputStream(f); |
| fos.write(( |
| "com.sun.security.jgss.krb5.initiate {\n" + |
| " com.sun.security.auth.module.Krb5LoginModule required;\n};\n" + |
| "com.sun.security.jgss.krb5.accept {\n" + |
| " com.sun.security.auth.module.Krb5LoginModule required\n" + |
| " principal=\"*\"\n" + |
| " useKeyTab=true\n" + |
| " isInitiator=false\n" + |
| " storeKey=true;\n};\n" + |
| "client {\n" + |
| " com.sun.security.auth.module.Krb5LoginModule required;\n};\n" + |
| "server {\n" + |
| " com.sun.security.auth.module.Krb5LoginModule required\n" + |
| " principal=\"" + SERVER + "\"\n" + |
| " useKeyTab=true\n" + |
| " storeKey=true;\n};\n" + |
| "backend {\n" + |
| " com.sun.security.auth.module.Krb5LoginModule required\n" + |
| " principal=\"" + BACKEND + "\"\n" + |
| " useKeyTab=true\n" + |
| " storeKey=true\n" + |
| " isInitiator=false;\n};\n" |
| ).getBytes()); |
| fos.close(); |
| return this; |
| } |
| |
| /** |
| * The default callback handler for JAAS login. Note that this handler is |
| * hard coded to provide only info for USER1. If you need to provide info |
| * for another principal, please use Context.fromUserPass() instead. |
| */ |
| public static class CallbackForClient implements CallbackHandler { |
| public void handle(Callback[] callbacks) { |
| String user = OneKDC.USER; |
| char[] pass = OneKDC.PASS; |
| for (Callback callback : callbacks) { |
| if (callback instanceof NameCallback) { |
| System.out.println("Callback for name: " + user); |
| ((NameCallback) callback).setName(user); |
| } |
| if (callback instanceof PasswordCallback) { |
| System.out.println("Callback for pass: " |
| + new String(pass)); |
| ((PasswordCallback) callback).setPassword(pass); |
| } |
| } |
| } |
| } |
| } |