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/lang/instrument/CustomSystemLoader/CustomLoader.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2016, 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.
+ */
+
+import java.io.DataInputStream;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.PrintStream;
+import java.util.jar.JarFile;
+import java.util.zip.ZipEntry;
+
+public class CustomLoader extends ClassLoader {
+    private static PrintStream out = System.out;
+    public  static ClassLoader myself;
+    public  static ClassLoader agentClassLoader;
+    public  static boolean failed = true;
+
+    public CustomLoader(ClassLoader classLoader) {
+        super(classLoader);
+        myself = this;
+    }
+
+    @Override
+    public Class<?> loadClass(String name) throws ClassNotFoundException {
+        out.println("CustomLoader: loading class: " + name);
+        if (name.equals("Agent")) {
+            Class c = null;
+            try {
+                byte[] buf = locateBytes();
+                c = defineClass(name, buf, 0, buf.length);
+            } catch (IOException ex) {
+                throw new ClassNotFoundException(ex.getMessage());
+            }
+            resolveClass(c);
+            out.println("CustomLoader.loadClass after resolveClass: " + name +
+                        "; Class: " + c + "; ClassLoader: " + c.getClassLoader());
+            return c;
+        }
+        return super.loadClass(name);
+    }
+
+    private byte[] locateBytes() throws IOException {
+        try {
+            JarFile jar = new JarFile("Agent.jar");
+            InputStream is = jar.getInputStream(jar.getEntry("Agent.class"));
+            int len = is.available();
+            byte[] buf = new byte[len];
+            DataInputStream in = new DataInputStream(is);
+            in.readFully(buf);
+            return buf;
+        } catch (IOException ioe) {
+            ioe.printStackTrace();
+            throw new IOException("Test failed due to IOException!");
+        }
+    }
+
+    void appendToClassPathForInstrumentation(String path) {
+        out.println("CustomLoader.appendToClassPathForInstrumentation: " +
+                    this + ", jar: " + path);
+        failed = false;
+    }
+}