src/share/classes/sun/security/krb5/internal/ccache/CCacheInputStream.java

rev 10175 : 8048073: Cannot read ccache entry with a realm-less service name

@@ -332,19 +332,32 @@
      * entry is used by KDC to inform the client that it support certain
      * features. Its ticket is not a valid krb5 ticket and thus this method
      * returns null.
      */
     Credentials readCred(int version) throws IOException,RealmException, KrbApErrException, Asn1Exception {
-        PrincipalName cpname = readPrincipal(version);
-        if (DEBUG)
+        PrincipalName cpname = null;
+        try {
+            cpname = readPrincipal(version);
+        } catch (Exception e) {
+            // cpname is null
+        }
+        if (DEBUG) {
             System.out.println(">>>DEBUG <CCacheInputStream>  client principal is " + cpname);
-        PrincipalName spname = readPrincipal(version);
-        if (DEBUG)
+        }
+        PrincipalName spname = null;
+        try {
+            spname = readPrincipal(version);
+        } catch (Exception e) {
+            // spname is null
+        }
+        if (DEBUG) {
             System.out.println(">>>DEBUG <CCacheInputStream> server principal is " + spname);
+        }
         EncryptionKey key = readKey(version);
-        if (DEBUG)
+        if (DEBUG) {
             System.out.println(">>>DEBUG <CCacheInputStream> key type: " + key.getEType());
+        }
         long times[] = readTimes();
         KerberosTime authtime = new KerberosTime(times[0]);
         KerberosTime starttime =
                 (times[1]==0) ? null : new KerberosTime(times[1]);
         KerberosTime endtime = new KerberosTime(times[2]);

@@ -373,10 +386,14 @@
             auData = new AuthorizationData(auDataEntry);
         }
         byte[] ticketData = readData();
         byte[] ticketData2 = readData();
 
+        if (cpname == null || spname == null) {
+            return null;
+        }
+
         try {
             return new Credentials(cpname, spname, key, authtime, starttime,
                 endtime, renewTill, skey, tFlags,
                 addrs, auData,
                 ticketData != null ? new Ticket(ticketData) : null,