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/net/httpclient/HttpRequestBodyPublishers/ByteBufferUtils.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2025, 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.nio.ByteBuffer;
+import java.util.Arrays;
+import java.util.Objects;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+public final class ByteBufferUtils {
+
+    private ByteBufferUtils() {}
+
+    public static void assertEquals(ByteBuffer expectedBuffer, ByteBuffer actualBuffer, String message) {
+        assertEquals(bytes(expectedBuffer), bytes(actualBuffer), message);
+    }
+
+    public static void assertEquals(byte[] expectedBytes, ByteBuffer actualBuffer, String message) {
+        assertEquals(expectedBytes, bytes(actualBuffer), message);
+    }
+
+    public static void assertEquals(byte[] expectedBytes, byte[] actualBytes, String message) {
+        Objects.requireNonNull(expectedBytes);
+        Objects.requireNonNull(actualBytes);
+        int mismatchIndex = Arrays.mismatch(expectedBytes, actualBytes);
+        if (mismatchIndex >= 0) {
+            Byte expectedByte = mismatchIndex >= expectedBytes.length ? null : expectedBytes[mismatchIndex];
+            Byte actualByte = mismatchIndex >= actualBytes.length ? null : actualBytes[mismatchIndex];
+            String extendedMessage = String.format(
+                    "%s" +
+                            "array contents differ at index [%s], expected: <%s> but was: <%s>%n" +
+                            "expected: %s%n" +
+                            "actual:   %s%n",
+                    message == null ? "" : (message + ": "),
+                    mismatchIndex, expectedByte, actualByte,
+                    prettyPrintBytes(expectedBytes),
+                    prettyPrintBytes(actualBytes));
+            throw new AssertionError(extendedMessage);
+        }
+    }
+
+    private static byte[] bytes(ByteBuffer buffer) {
+        byte[] bytes = new byte[buffer.limit()];
+        buffer.get(bytes);
+        return bytes;
+    }
+
+    private static String prettyPrintBytes(byte[] bytes) {
+        return IntStream.range(0, bytes.length)
+                .mapToObj(i -> "" + bytes[i])
+                .collect(Collectors.joining(", ", "[", "]"));
+    }
+
+    public static int findLengthExceedingMaxMemory() {
+        long memoryLength = Runtime.getRuntime().maxMemory();
+        double length = Math.ceil(1.5D * memoryLength);
+        if (length < 1 || length > Integer.MAX_VALUE) {
+            throw new IllegalArgumentException("Bogus or excessive memory: " + memoryLength);
+        }
+        return (int) length;
+    }
+
+    public static byte[] byteArrayOfLength(int length) {
+        byte[] bytes = new byte[length];
+        for (int i = 0; i < length; i++) {
+            bytes[i] = (byte) i;
+        }
+        return bytes;
+    }
+
+}