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Posted to dev@directory.apache.org by "Jichao Wang (Jira)" <ji...@apache.org> on 2022/12/05 02:49:00 UTC
[jira] [Created] (DIRKRB-762) The AS request appears with an NPE when preauth_required is set to false
Jichao Wang created DIRKRB-762:
----------------------------------
Summary: The AS request appears with an NPE when preauth_required is set to false
Key: DIRKRB-762
URL: https://issues.apache.org/jira/browse/DIRKRB-762
Project: Directory Kerberos
Issue Type: Bug
Affects Versions: 2.0.2, 2.0.1, 2.0.0
Reporter: Jichao Wang
Fix For: 2.0.3
If change the value of preauth_required in the kdc.conf file to false, then using the following code to access the KDC causes an NPE error.
{code:java}
public class Test {
public static void main(String[] args) throws Exception {
LoginContext lc = new LoginContext("SampleClient",
new Subject(),
null,
new CustomConfiguration("hadoop@HADOOP.COM", "/root/wjc/hadoop.keytab"));
lc.login();
System.out.println(lc.getSubject().toString());
}
} {code}
Here is a fix to the problem:
{code:java}
Index: kerb-server/src/main/java/org/apache/kerby/kerberos/kerb/server/request/KdcRequest.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/kerb-server/src/main/java/org/apache/kerby/kerberos/kerb/server/request/KdcRequest.java b/kerb-server/src/main/java/org/apache/kerby/kerberos/kerb/server/request/KdcRequest.java
--- a/kerb-server/src/main/java/org/apache/kerby/kerberos/kerb/server/request/KdcRequest.java (revision 03784fcde8e94fedbe789606d2f328104c20b33f)
+++ b/kerb-server/src/main/java/org/apache/kerby/kerberos/kerb/server/request/KdcRequest.java (date 1670208269200)
@@ -678,11 +678,13 @@
}
PaData preAuthData = request.getPaData();
- if (isPreauthRequired() && (preAuthData == null || preAuthData.isEmpty())) {
- LOG.info("The preauth data is empty.");
- KrbError krbError = makePreAuthenticationError(kdcContext, request,
- KrbErrorCode.KDC_ERR_PREAUTH_REQUIRED, false);
- throw new KdcRecoverableException(krbError);
+ if (isPreauthRequired()) {
+ if (preAuthData == null || preAuthData.isEmpty()) {
+ LOG.info("The preauth data is empty.");
+ KrbError krbError = makePreAuthenticationError(kdcContext, request,
+ KrbErrorCode.KDC_ERR_PREAUTH_REQUIRED, false);
+ throw new KdcRecoverableException(krbError);
+ }
} else {
getPreauthHandler().verify(this, preAuthData);
}{code}
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