| /* |
| * Copyright (c) 2018, 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. |
| */ |
| /* |
| * @test |
| * @bug 8201867 |
| * @summary Kerberos keytabs with holes in certain places are parsed incorrectly |
| * @modules java.security.jgss/sun.security.krb5 |
| * java.security.jgss/sun.security.krb5.internal.ktab |
| * @run main/othervm BufferBoundary |
| */ |
| |
| import sun.security.krb5.PrincipalName; |
| import sun.security.krb5.internal.ktab.KeyTab; |
| import sun.security.krb5.internal.ktab.KeyTabEntry; |
| import sun.security.krb5.internal.ktab.KeyTabInputStream; |
| import sun.security.krb5.internal.ktab.KeyTabOutputStream; |
| |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.nio.file.Paths; |
| import java.util.List; |
| |
| public class BufferBoundary { |
| public static void main(String[] args) throws Exception { |
| |
| // We force using one etype so the output is determined |
| Files.write(Paths.get("krb5.conf"), List.of( |
| "[libdefaults]", |
| "default_tkt_enctypes = aes128-cts" |
| )); |
| System.setProperty("java.security.krb5.conf", "krb5.conf"); |
| |
| KeyTab kt = KeyTab.create("ktab"); |
| int num = 0; |
| while (true) { |
| num++; |
| PrincipalName pn = new PrincipalName( |
| String.format("user%03d@REALM", num)); |
| kt.addEntry(pn, "password".toCharArray(), num, true); |
| int length = 2; |
| for (KeyTabEntry e : kt.getEntries()) { |
| length += e.entryLength() + 4; |
| } |
| // Create enough big keytab |
| if (length > 8400) { |
| break; |
| } |
| } |
| kt.save(); |
| |
| int count = 0; |
| boolean written = false; |
| try (KeyTabInputStream kin |
| = new KeyTabInputStream(new FileInputStream("ktab")); |
| KeyTabOutputStream kout |
| = new KeyTabOutputStream(new FileOutputStream("ktab2"))) { |
| kout.write(kin.readNBytes(2)); // version |
| count += 2; |
| while (true) { |
| int len; |
| |
| try { |
| len = kin.read(4); |
| } catch (IOException e) { |
| break; // reach end |
| } |
| count += 4; |
| byte[] data = kin.readNBytes(len); |
| count += len; |
| if (count < 8192 || written) { |
| kout.write32(len); |
| kout.write(data); |
| } else { |
| // Create a hole on the 8192 boundary |
| kout.write32(-len); |
| kout.write(new byte[len]); |
| written = true; |
| } |
| } |
| } |
| |
| kt = KeyTab.getInstance("ktab2"); |
| if (!kt.isValid()) { |
| throw new Exception("Should be valid"); |
| } |
| if (kt.getEntries().length != num - 1) { |
| throw new Exception("Should have " + (num - 1) + " entries"); |
| } |
| } |
| } |