151 lines
6.3 KiB
Java
151 lines
6.3 KiB
Java
/*
|
|
* Copyright (c) 2008, 2021, 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 += "permitted_enctypes=" + etype
|
|
+ "\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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|