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https://issues.apache.org/jira/browse/HADOOP-10158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13889675#comment-13889675
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Alejandro Abdelnur commented on HADOOP-10158:
---------------------------------------------
KerberosAuthenticationHandler.java:
* loginPrincipal(), it seems it is not considering the case of a 'HTTP@REALM'
principal and it would assume it is correct.
* getLoginForHost():
{code}
SpnegoLogin newLogin = new SpnegoLogin(principal);
spnegoLogin = logins.putIfAbsent(host, newLogin);
if (spnegoLogin == null) {
spnegoLogin = newLogin;
}
spnegoLogin.login(keytab);
{code}
We should add a comment on the spnegoLogin.login(keytab) invocation that in the
case of a race condition the second login attempt is a NOP.
KerberosUtil.java:
* getRealmForHost(), typo s/retun/return/. Please add an 'IMPORTANT:’ comment
here explaining we are tapping into implementation specific methods of the
Oracle and IBM JDKs, it may break in other JDKs or in future versions, and it
may blow if a SecurityManager is in place.
> SPNEGO should work with multiple interfaces/SPNs.
> -------------------------------------------------
>
> Key: HADOOP-10158
> URL: https://issues.apache.org/jira/browse/HADOOP-10158
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.2.0
> Reporter: Kihwal Lee
> Assignee: Daryn Sharp
> Priority: Critical
> Attachments: HADOOP-10158-readkeytab.patch,
> HADOOP-10158-readkeytab.patch, HADOOP-10158.patch, HADOOP-10158.patch,
> HADOOP-10158_multiplerealms.patch, HADOOP-10158_multiplerealms.patch,
> HADOOP-10158_multiplerealms.patch
>
>
> This is the list of internal servlets added by namenode.
> | Name | Auth | Need to be accessible by end users |
> | StartupProgressServlet | none | no |
> | GetDelegationTokenServlet | internal SPNEGO | yes |
> | RenewDelegationTokenServlet | internal SPNEGO | yes |
> | CancelDelegationTokenServlet | internal SPNEGO | yes |
> | FsckServlet | internal SPNEGO | yes |
> | GetImageServlet | internal SPNEGO | no |
> | ListPathsServlet | token in query | yes |
> | FileDataServlet | token in query | yes |
> | FileChecksumServlets | token in query | yes |
> | ContentSummaryServlet | token in query | yes |
> GetDelegationTokenServlet, RenewDelegationTokenServlet,
> CancelDelegationTokenServlet and FsckServlet are accessed by end users, but
> hard-coded to use the internal SPNEGO filter.
> If a name node HTTP server binds to multiple external IP addresses, the
> internal SPNEGO service principal name may not work with an address to which
> end users are connecting. The current SPNEGO implementation in Hadoop is
> limited to use a single service principal per filter.
> If the underlying hadoop kerberos authentication handler cannot easily be
> modified, we can at least create a separate auth filter for the end-user
> facing servlets so that their service principals can be independently
> configured. If not defined, it should fall back to the current behavior.
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