jtstorck commented on a change in pull request #4095: NIFI-7018: Initial commit
of processors extending AbstractHadoopProce…
URL: https://github.com/apache/nifi/pull/4095#discussion_r385384759
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File path:
nifi-nar-bundles/nifi-extension-utils/nifi-hadoop-utils/src/main/java/org/apache/nifi/hadoop/SecurityUtil.java
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@@ -69,6 +79,37 @@ public static synchronized UserGroupInformation
loginKerberos(final Configuratio
return UserGroupInformation.getCurrentUser();
}
+ public static synchronized UserGroupInformation
loginKerberosWithPassword(final Configuration config, final String principal,
final String password) throws IOException {
+ Validate.notNull(config);
+ Validate.notNull(principal);
+ Validate.notNull(password);
+
+ KerberosPasswordUser kerberosPasswordUser = new
KerberosPasswordUser(principal, password);
+ return getUgiForKerberosUser(config, kerberosPasswordUser);
+ }
+
+ public static synchronized UserGroupInformation
getUgiForKerberosUser(final Configuration config, final KerberosUser
kerberosUser) throws IOException {
+ UserGroupInformation.setConfiguration(config);
+ try {
+ if (kerberosUser.isLoggedIn()) {
+ kerberosUser.checkTGTAndRelogin();
+ } else {
+ kerberosUser.login();
+ }
+ return
kerberosUser.doAs((PrivilegedExceptionAction<UserGroupInformation>) () -> {
+ AccessControlContext context = AccessController.getContext();
+ Subject subject = Subject.getSubject(context);
+ Validate.notEmpty(
+
subject.getPrincipals(KerberosPrincipal.class).stream().filter(p ->
p.getName().startsWith(kerberosUser.getPrincipal())).collect(Collectors.toSet()),
+ "No Subject was found matching the given principal");
+ return UserGroupInformation.getUGIFromSubject(subject);
+ });
+ } catch (PrivilegedActionException | LoginException e) {
+ throw new IOException("Unable to acquire UGI for KerberosUser: " +
e.getLocalizedMessage(),
Review comment:
Updated the code to use the message from the wrapped exception, and split
the unified catch into two distinct catch clauses.
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