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/Externalizable/compatibility/ExternalizableBlockData.java

@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2000, 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 4089540
+ * @summary Verify compatibility with 1.1 externalizable format
+ */
+
+import java.io.*;
+import java.util.*;
+
+class Foo implements Externalizable {
+    private static final long serialVersionUID = 0xbabel;
+
+    int x;
+    int y;
+    Object obj;
+
+    public Foo() {
+    }
+
+    public Foo(int x, int y, Object obj) {
+        this.x = x;
+        this.y = y;
+        this.obj = obj;
+    }
+
+    public void writeExternal(ObjectOutput out) throws IOException {
+        out.writeInt(x);
+        out.writeInt(y);
+        out.writeObject(obj);
+    }
+
+    public void readExternal(ObjectInput in)
+        throws IOException, ClassNotFoundException
+    {
+        x = in.readInt();
+        y = in.readInt();
+        obj = in.readObject();
+    }
+
+    public boolean equals(Object other) {
+        if (other instanceof Foo) {
+            Foo f = (Foo) other;
+            return ((x == f.x) && (y == f.y) &&
+                    ((obj != null) ? obj.equals(f.obj) : (f.obj == null)));
+        }
+        return false;
+    }
+}
+
+public class ExternalizableBlockData {
+    public static void main(String[] args) throws Exception {
+        byte[] oldExternalizableBytes = getFileBytes(
+                new File(System.getProperty("test.src", "."), "old.ser"));
+        Foo foo = new Foo(0xbad, 0xbeef, "burrito");
+        ByteArrayOutputStream bout = new ByteArrayOutputStream();
+        ObjectOutputStream oout = new ObjectOutputStream(bout);
+        oout.useProtocolVersion(ObjectStreamConstants.PROTOCOL_VERSION_1);
+        oout.writeObject(foo);
+        oout.close();
+        if (! Arrays.equals(bout.toByteArray(), oldExternalizableBytes)) {
+            throw new Error();
+        }
+
+        ObjectInputStream oin = new ObjectInputStream(
+                new ByteArrayInputStream(oldExternalizableBytes));
+        if (! foo.equals(oin.readObject())) {
+            throw new Error();
+        }
+
+        bout = new ByteArrayOutputStream();
+        oout = new ObjectOutputStream(bout);
+        oout.writeObject(foo);
+        oout.close();
+        if (Arrays.equals(bout.toByteArray(), oldExternalizableBytes)) {
+            throw new Error();
+        }
+    }
+
+    static byte[] getFileBytes(File file) throws IOException {
+        FileInputStream fin = new FileInputStream(file);
+        ByteArrayOutputStream bout = new ByteArrayOutputStream();
+        byte[] buf = new byte[256];
+        int n;
+
+        while ((n = fin.read(buf)) != -1) {
+            bout.write(buf, 0, n);
+        }
+        fin.close();
+        return bout.toByteArray();
+    }
+}