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/nio/channels/Channels/TransferTo.java

@@ -0,0 +1,207 @@
+/*
+ * Copyright (c) 2021, 2026, 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.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.channels.Channels;
+import java.nio.channels.FileChannel;
+import java.nio.channels.IllegalBlockingModeException;
+import java.nio.channels.Pipe;
+import java.nio.channels.ReadableByteChannel;
+import java.nio.channels.SelectableChannel;
+import java.nio.channels.WritableByteChannel;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+import java.util.stream.Stream;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+/*
+ * @test
+ * @library /test/lib
+ * @build jdk.test.lib.RandomFactory
+ * @run junit/othervm/timeout=720 TransferTo
+ * @bug 8265891
+ * @summary Tests whether sun.nio.ChannelInputStream.transferTo conforms to the
+ *          InputStream.transferTo specification
+ * @key randomness
+ */
+public class TransferTo extends TransferToBase {
+
+    /*
+     * Provides test scenarios, i.e., combinations of input and output streams
+     * to be tested.
+     */
+    public static Stream<Arguments> streamCombinations() {
+        return Stream.of
+            (// tests FileChannel.transferTo(FileChannel) optimized case
+             Arguments.of(fileChannelInput(), fileChannelOutput()),
+
+             // tests FileChannel.transferTo(SelectableChannelOutput)
+             // optimized case
+             Arguments.of(fileChannelInput(), selectableChannelOutput()),
+
+             // tests FileChannel.transferTo(WritableByteChannelOutput)
+             // optimized case
+             Arguments.of(fileChannelInput(), writableByteChannelOutput()),
+
+             // tests InputStream.transferTo(OutputStream) default case
+             Arguments.of(readableByteChannelInput(), defaultOutput()));
+    }
+
+    /*
+     * Input streams to be tested.
+     */
+    public static Stream<Arguments> inputStreamProviders() {
+        return Stream.of(Arguments.of(fileChannelInput()),
+                         Arguments.of(readableByteChannelInput()));
+    }
+
+    /*
+     * Testing API compliance: input stream must throw NullPointerException
+     * when parameter "out" is null.
+     */
+    @ParameterizedTest
+    @MethodSource("inputStreamProviders")
+    public void testNullPointerException(InputStreamProvider inputStreamProvider) {
+        assertNullPointerException(inputStreamProvider);
+    }
+
+    /*
+     * Testing API compliance: complete content of input stream must be
+     * transferred to output stream.
+     */
+    @ParameterizedTest
+    @MethodSource("streamCombinations")
+    public void testStreamContents(InputStreamProvider inputStreamProvider,
+            OutputStreamProvider outputStreamProvider) throws Exception {
+        assertStreamContents(inputStreamProvider, outputStreamProvider);
+    }
+
+    /*
+     * Special test whether selectable channel based transfer throws blocking mode exception.
+     */
+    @Test
+    public void testIllegalBlockingMode() throws IOException {
+        Pipe pipe = Pipe.open();
+        try {
+            // testing arbitrary input (here: empty file) to non-blocking
+            // selectable output
+            try (FileChannel fc = FileChannel.open(Files.createTempFile(CWD, "testIllegalBlockingMode", null));
+                InputStream is = Channels.newInputStream(fc);
+                SelectableChannel sc = pipe.sink().configureBlocking(false);
+                OutputStream os = Channels.newOutputStream((WritableByteChannel) sc)) {
+
+                // IllegalBlockingMode must be thrown when trying to perform
+                // a transfer
+                assertThrows(IllegalBlockingModeException.class, () -> is.transferTo(os));
+            }
+
+            // testing non-blocking selectable input to arbitrary output
+            // (here: byte array)
+            try (SelectableChannel sc = pipe.source().configureBlocking(false);
+                InputStream is = Channels.newInputStream((ReadableByteChannel) sc);
+                OutputStream os = new ByteArrayOutputStream()) {
+
+                // IllegalBlockingMode must be thrown when trying to perform
+                // a transfer
+                assertThrows(IllegalBlockingModeException.class, () -> is.transferTo(os));
+            }
+        } finally {
+            pipe.source().close();
+            pipe.sink().close();
+        }
+    }
+
+    /*
+     * Creates a provider for an output stream which does not wrap a channel
+     */
+    private static OutputStreamProvider defaultOutput() {
+        return spy -> {
+            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+            spy.accept(outputStream::toByteArray);
+            return outputStream;
+        };
+    }
+
+    /*
+     * Creates a provider for an input stream which wraps a file channel
+     */
+    private static InputStreamProvider fileChannelInput() {
+        return bytes -> {
+            Path path = Files.createTempFile(CWD, "fileChannelInput", null);
+            Files.write(path, bytes);
+            FileChannel fileChannel = FileChannel.open(path);
+            return Channels.newInputStream(fileChannel);
+        };
+    }
+
+    /*
+     * Creates a provider for an output stream which wraps a selectable channel
+     */
+    private static OutputStreamProvider selectableChannelOutput() {
+        return spy -> {
+            Pipe pipe = Pipe.open();
+            Future<byte[]> bytes = CompletableFuture.supplyAsync(() -> {
+                try {
+                    InputStream is = Channels.newInputStream(pipe.source());
+                    return is.readAllBytes();
+                } catch (IOException e) {
+                    throw new AssertionError("Exception while asserting content", e);
+                }
+            });
+            final OutputStream os = Channels.newOutputStream(pipe.sink());
+            spy.accept(() -> {
+                try {
+                    os.close();
+                    return bytes.get();
+                } catch (IOException | InterruptedException | ExecutionException e) {
+                    throw new AssertionError("Exception while asserting content", e);
+                }
+            });
+            return os;
+        };
+    }
+
+    /*
+     * Creates a provider for an output stream which wraps a writable byte channel but is not a file channel
+     */
+    private static OutputStreamProvider writableByteChannelOutput() {
+        return spy -> {
+            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+            spy.accept(outputStream::toByteArray);
+            return Channels.newOutputStream(Channels.newChannel(outputStream));
+        };
+    }
+
+}