# HG changeset patch
# User weijun
# Date 1381852916 -3600
#      Tue Oct 15 17:01:56 2013 +0100
# Node ID 698fe468e8b9385c2f74709dca823800b32e0b55
# Parent  d55d40616754cd93aa396719ddfd81bae584d4f0
8014341: Better service from Kerberos servers
Summary: read incoming data safely and take care of null return value
Reviewed-by: valeriep, ahgross

diff -r d55d40616754 -r 698fe468e8b9 src/share/classes/sun/security/krb5/KrbKdcReq.java
--- jdk/src/share/classes/sun/security/krb5/KrbKdcReq.java	Tue May 21 13:56:39 2013 +0400
+++ jdk/src/share/classes/sun/security/krb5/KrbKdcReq.java	Tue Oct 15 17:01:56 2013 +0100
@@ -151,11 +151,15 @@
                 savedException = e;
             }
         }
-        if (ibuf == null && savedException != null) {
-            if (savedException instanceof IOException) {
-                throw (IOException) savedException;
+        if (ibuf == null) {
+            if (savedException != null) {
+                if (savedException instanceof IOException) {
+                    throw (IOException) savedException;
+                } else {
+                    throw (KrbException) savedException;
+                }
             } else {
-                throw (KrbException) savedException;
+                throw new IOException("Cannot get a KDC reply");
             }
         }
         return tempKdc;
diff -r d55d40616754 -r 698fe468e8b9 src/share/classes/sun/security/krb5/internal/TCPClient.java
--- jdk/src/share/classes/sun/security/krb5/internal/TCPClient.java	Tue May 21 13:56:39 2013 +0400
+++ jdk/src/share/classes/sun/security/krb5/internal/TCPClient.java	Tue Oct 15 17:01:56 2013 +0100
@@ -30,6 +30,8 @@
 
 package sun.security.krb5.internal;
 
+import sun.misc.IOUtils;
+
 import java.io.*;
 import java.net.*;
 
@@ -79,17 +81,15 @@
             return null;
         }
 
-        byte data[] = new byte[len];
-        count = readFully(data, len);
-        if (count != len) {
+        try {
+            return IOUtils.readFully(in, len, true);
+        } catch (IOException ioe) {
             if (Krb5.DEBUG) {
                 System.out.println(
                     ">>>DEBUG: TCPClient could not read complete packet (" +
                     len + "/" + count + ")");
             }
             return null;
-        } else {
-            return data;
         }
     }