HBASE-20664 Reduce the broad scope of outToken in ThriftHttpServlet

Signed-off-by: Andrew Purtell <apurt...@apache.org>


Project: http://git-wip-us.apache.org/repos/asf/hbase/repo
Commit: http://git-wip-us.apache.org/repos/asf/hbase/commit/5f03fb39
Tree: http://git-wip-us.apache.org/repos/asf/hbase/tree/5f03fb39
Diff: http://git-wip-us.apache.org/repos/asf/hbase/diff/5f03fb39

Branch: refs/heads/branch-1.3
Commit: 5f03fb399c13ff1eebf4067af6dc11cdded1694d
Parents: 405a304
Author: Josh Elser <els...@apache.org>
Authored: Thu May 31 13:02:53 2018 -0400
Committer: Josh Elser <els...@apache.org>
Committed: Thu May 31 20:00:32 2018 -0400

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 .../hadoop/hbase/thrift/ThriftHttpServlet.java  | 24 +++++++++++++++-----
 1 file changed, 18 insertions(+), 6 deletions(-)
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http://git-wip-us.apache.org/repos/asf/hbase/blob/5f03fb39/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftHttpServlet.java
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diff --git 
a/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftHttpServlet.java
 
b/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftHttpServlet.java
index 28aa0e1..3dfa50a 100644
--- 
a/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftHttpServlet.java
+++ 
b/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftHttpServlet.java
@@ -57,7 +57,6 @@ public class ThriftHttpServlet extends TServlet {
   private final boolean securityEnabled;
   private final boolean doAsEnabled;
   private transient ThriftServerRunner.HBaseHandler hbaseHandler;
-  private String outToken;
 
   // HTTP Header related constants.
   public static final String WWW_AUTHENTICATE = "WWW-Authenticate";
@@ -83,10 +82,11 @@ public class ThriftHttpServlet extends TServlet {
       try {
         // As Thrift HTTP transport doesn't support SPNEGO yet (THRIFT-889),
         // Kerberos authentication is being done at servlet level.
-        effectiveUser = doKerberosAuth(request);
+        final RemoteUserIdentity identity = doKerberosAuth(request);
+        effectiveUser = identity.principal;
         // It is standard for client applications expect this header.
         // Please see http://tools.ietf.org/html/rfc4559 for more details.
-        response.addHeader(WWW_AUTHENTICATE,  NEGOTIATE + " " + outToken);
+        response.addHeader(WWW_AUTHENTICATE,  NEGOTIATE + " " + 
identity.outToken);
       } catch (HttpAuthenticationException e) {
         LOG.error("Kerberos Authentication failed", e);
         // Send a 401 to the client
@@ -127,19 +127,31 @@ public class ThriftHttpServlet extends TServlet {
    * We already have a logged in subject in the form of serviceUGI,
    * which GSS-API will extract information from.
    */
-  private String doKerberosAuth(HttpServletRequest request)
+  private RemoteUserIdentity doKerberosAuth(HttpServletRequest request)
       throws HttpAuthenticationException {
     HttpKerberosServerAction action = new HttpKerberosServerAction(request, 
realUser);
     try {
       String principal = realUser.doAs(action);
-      outToken = action.outToken;
-      return principal;
+      return new RemoteUserIdentity(principal, action.outToken);
     } catch (Exception e) {
       LOG.error("Failed to perform authentication");
       throw new HttpAuthenticationException(e);
     }
   }
 
+  /**
+   * Basic "struct" class to hold the final base64-encoded, authenticated 
GSSAPI token
+   * for the user with the given principal talking to the Thrift server.
+   */
+  private static class RemoteUserIdentity {
+    final String outToken;
+    final String principal;
+
+    RemoteUserIdentity(String principal, String outToken) {
+      this.principal = principal;
+      this.outToken = outToken;
+    }
+  }
 
   private static class HttpKerberosServerAction implements 
PrivilegedExceptionAction<String> {
     HttpServletRequest request;

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