undefect. CWE-407 — 63 sites patched across 27 ecosystems

Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.

test/jdk/java/io/RandomAccessFile/skipBytes/SkipBytes.java

@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+
+/* @test
+   @bug 4027717
+   @summary Check for correct implementation of RandomAccessFile.skipBytes
+   */
+
+
+import java.io.*;
+
+public class SkipBytes{
+
+
+    /*
+     * doTest attempts to skip num_to_skip bytes in raf starting from position 0.
+     * It also does a read after the skip to check if EOF has been reached
+     * correctly or incorrectly.
+     */
+
+
+    private static void doTest(RandomAccessFile raf, int start, int num_to_skip)
+        throws Exception
+    {
+
+        raf.seek(start);
+
+        long cur_ptr = raf.getFilePointer();
+        int length = (int) raf.length();
+        System.err.println("\nCurrent pointer = " + cur_ptr + " length = " +
+                           length + " num_to_skip = " + num_to_skip);
+
+        //Do the Skip test
+        int num_skipped = raf.skipBytes(num_to_skip);
+        System.err.println("After skipBytes -- no. skipped = " + num_skipped);
+
+        // if num_to_skip is negative do the negative skip test
+        if (num_to_skip <= 0) {
+            if (num_skipped != 0){
+                System.err.println("Negative Skip Test Failed");
+                throw new RuntimeException("Negative Skip Test Failed");
+            }
+            else {
+                System.err.println("Negative Skip Test Succeeded");
+            }
+        }
+
+        cur_ptr = raf.getFilePointer();
+        System.err.println("Current pointer = " + cur_ptr);
+
+        // Check if skip has gone beyond EOF.
+        if (cur_ptr > length) {
+            System.err.println("Past EOF Skip Test Failed");
+            throw new RuntimeException("Past EOF Skip Test Failed");
+        }
+        else {
+            System.err.println("Past EOF Skip Test Succeeded");
+        }
+
+        // do read test
+        int byte_read = raf.read();
+        if ( (cur_ptr == length) &&
+             (byte_read != -1) ) {
+            System.err.println("byte_read = " + byte_read +
+                               " Read Test Failed ......");
+            throw new RuntimeException("Read Test Failed");
+        }
+        else {
+            System.err.println("byte_read = " + byte_read +
+                               " Read Test Succeeded");
+        }
+
+    }
+
+    public static void main(String[] args) throws Exception {
+
+        RandomAccessFile raf = new RandomAccessFile("input.txt" , "rw");
+        try {
+            int length = (int)raf.length();
+
+            doTest(raf , 0 , 2*length);
+            doTest(raf , 0 , length);
+            doTest(raf , 0 , length/2);
+            doTest(raf , length/2 , -2);
+            doTest(raf , length , 0);
+            doTest(raf , 0 , -1);
+        } finally{
+            raf.close();
+        }
+
+    }
+
+}