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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
This commit is contained in:
russell@unturf.com 2026-03-26 17:11:57 -04:00
commit 0a580b313d
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148
test/jdk/sun/security/krb5/auto/DynamicKeytab.java Normal file
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/*
* Copyright (c) 2011, 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 6894072 8194486
* @summary always refresh keytab
* @library /test/lib
* @compile -XDignore.symbol.file DynamicKeytab.java
* @run main jdk.test.lib.FileInstaller TestHosts TestHosts
* @run main/othervm -Djdk.net.hosts.file=TestHosts DynamicKeytab
*/
import java.io.File;
import java.io.FileOutputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import org.ietf.jgss.GSSException;
import sun.security.jgss.GSSUtil;
import sun.security.krb5.KrbException;
import sun.security.krb5.internal.Krb5;
public class DynamicKeytab {
Context c, s;
public static void main(String[] args)
throws Exception {
new DynamicKeytab().go();
}
void go() throws Exception {
OneKDC k = new OneKDC(null);
k.writeJAASConf();
Files.delete(Paths.get(OneKDC.KTAB));
// Starts with no keytab
c = Context.fromJAAS("client");
s = Context.fromJAAS("com.sun.security.jgss.krb5.accept");
// Test 1: read new key 1 from keytab
k.addPrincipal(OneKDC.SERVER, "pass1".toCharArray());
k.writeKtab(OneKDC.KTAB);
connect();
// Test 2: service key cached, find 1 in keytab (now contains 1 and 2)
k.addPrincipal(OneKDC.SERVER, "pass2".toCharArray());
k.appendKtab(OneKDC.KTAB);
connect();
// Test 3: re-login. Now find 2 in keytab
c = Context.fromJAAS("client");
connect();
// Test 4: re-login, KDC use 3 this time.
c = Context.fromJAAS("client");
// Put 3 and 4 into keytab but keep the real key back to 3.
k.addPrincipal(OneKDC.SERVER, "pass3".toCharArray());
k.appendKtab(OneKDC.KTAB);
k.addPrincipal(OneKDC.SERVER, "pass4".toCharArray());
k.appendKtab(OneKDC.KTAB);
k.addPrincipal(OneKDC.SERVER, "pass3".toCharArray());
connect();
// Test 5: invalid keytab file, should ignore
try (FileOutputStream fos = new FileOutputStream(OneKDC.KTAB)) {
fos.write("BADBADBAD".getBytes());
}
connect();
// Test 6: delete keytab file, identical to revoke all
Files.delete(Paths.get(OneKDC.KTAB));
try {
connect();
throw new Exception("Should not success");
} catch (GSSException gsse) {
System.out.println(gsse);
KrbException ke = (KrbException)gsse.getCause();
// KrbApReq.authenticate(*) if (dkey == null)...
// This should have been Krb5.KRB_AP_ERR_NOKEY
if (ke.returnCode() != Krb5.API_INVALID_ARG) {
throw new Exception("Not expected failure code: " +
ke.returnCode());
}
}
// Test 7: 3 revoked, should fail (now contains only 5)
k.addPrincipal(OneKDC.SERVER, "pass5".toCharArray());
k.writeKtab(OneKDC.KTAB); // overwrite keytab, which means
// old key is revoked
try {
connect();
throw new Exception("Should not success");
} catch (GSSException gsse) {
System.out.println(gsse);
// Since 7197159, different kvno is accepted, this return code
// will never be thrown out again.
//KrbException ke = (KrbException)gsse.getCause();
//if (ke.returnCode() != Krb5.KRB_AP_ERR_BADKEYVER) {
// throw new Exception("Not expected failure code: " +
// ke.returnCode());
//}
}
// Test 8: an empty KDC means revoke all
KDC.create("EMPTY.REALM").writeKtab(OneKDC.KTAB);
try {
connect();
throw new Exception("Should not success");
} catch (GSSException gsse) {
System.out.println(gsse);
KrbException ke = (KrbException)gsse.getCause();
// KrbApReq.authenticate(*) if (dkey == null)...
// This should have been Krb5.KRB_AP_ERR_NOKEY
if (ke.returnCode() != Krb5.API_INVALID_ARG) {
throw new Exception("Not expected failure code: " +
ke.returnCode());
}
}
}
void connect() throws Exception {
Thread.sleep(2000); // make sure ktab timestamp is different
c.startAsClient(OneKDC.SERVER, GSSUtil.GSS_KRB5_MECH_OID);
s.startAsServer(GSSUtil.GSS_KRB5_MECH_OID);
Context.handshake(c, s);
}
}