8303891: Speed up Zip64SizeTest using a small ZIP64 file

8259866: two java.util tests failed with "IOException: There is not enough space on the disk"

Backport-of: 842b895f093e15ecd8aa0153d712f5f81cf1cf67

Author: Andrew Lu

test/jdk/java/util/zip/ZipFile/Zip64SizeTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2024, 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
@@ -20,117 +20,174 @@
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
-import org.testng.annotations.AfterMethod;
-import org.testng.annotations.BeforeMethod;
-import org.testng.annotations.Test;
 
-import java.io.*;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.util.List;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;
 import java.util.zip.ZipOutputStream;
 
-import static org.testng.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 
 /**
  * @test
- * @bug 8226530
- * @summary ZIP File System tests that leverage DirectoryStream
+ * @bug 8226530 8303891
+ * @summary Verify that ZipFile reads size fields using the Zip64 extra
+ * field when only the 'uncompressed size' field has the ZIP64 "magic value" 0xFFFFFFFF
  * @compile Zip64SizeTest.java
- * @run testng Zip64SizeTest
+ * @run junit Zip64SizeTest
  */
 public class Zip64SizeTest {
-
-    private static final int BUFFER_SIZE = 2048;
     // ZIP file to create
-    private static final String ZIP_FILE_NAME = "Zip64SizeTest.zip";
-    // File that will be created with a size greater than 0xFFFFFFFF
-    private static final String LARGE_FILE_NAME = "LargeZipEntry.txt";
-    // File that will be created with a size less than 0xFFFFFFFF
-    private static final String SMALL_FILE_NAME = "SmallZipEntry.txt";
-    // List of files to be added to the ZIP file
-    private static final List<String> ZIP_ENTRIES = List.of(LARGE_FILE_NAME,
-            SMALL_FILE_NAME);
-    private static final long LARGE_FILE_SIZE = 5L * 1024L * 1024L * 1024L; // 5GB
-    private static final long SMALL_FILE_SIZE = 0x100000L; // 1024L x 1024L;
+    private static final Path ZIP_FILE = Path.of("Zip64SizeTest.zip");
+    // Contents to write to ZIP entries
+    private static final byte[] CONTENT = "Hello".getBytes(StandardCharsets.UTF_8);
+    // This opaque tag will be ignored by ZipEntry.setExtra0
+    private static final int UNKNOWN_TAG = 0x9902;
+    // Tag used when converting the extra field to a real ZIP64 extra field
+    private static final short ZIP64_TAG = 0x1;
+    // Marker value to indicate that the actual value is stored in the ZIP64 extra field
+    private static final int ZIP64_MAGIC_VALUE = 0xFFFFFFFF;
 
     /**
-     * Validate that if the size of a ZIP entry exceeds 0xFFFFFFFF, that the
-     * correct size is returned from the ZIP64 Extended information.
-     * @throws IOException
+     * Validate that if the 'uncompressed size' of a ZIP CEN header is 0xFFFFFFFF, then the
+     * actual size is retrieved from the corresponding ZIP64 Extended information field.
+     *
+     * @throws IOException if an unexpected IOException occurs
      */
     @Test
-    private static void validateZipEntrySizes() throws IOException {
-        createFiles();
+    public void validateZipEntrySizes() throws IOException {
         createZipFile();
         System.out.println("Validating Zip Entry Sizes");
-        try (ZipFile zip = new ZipFile(ZIP_FILE_NAME)) {
-            ZipEntry ze = zip.getEntry(LARGE_FILE_NAME);
+        try (ZipFile zip = new ZipFile(ZIP_FILE.toFile())) {
+            ZipEntry ze = zip.getEntry("first");
             System.out.printf("Entry: %s, size= %s%n", ze.getName(), ze.getSize());
-            assertTrue(ze.getSize() == LARGE_FILE_SIZE);
-            ze = zip.getEntry(SMALL_FILE_NAME);
+            assertEquals(CONTENT.length, ze.getSize());
+            ze = zip.getEntry("second");
             System.out.printf("Entry: %s, size= %s%n", ze.getName(), ze.getSize());
-            assertTrue(ze.getSize() == SMALL_FILE_SIZE);
-
+            assertEquals(CONTENT.length, ze.getSize());
         }
     }
 
     /**
-     * Delete the files created for use by the test
-     * @throws IOException if an error occurs deleting the files
+     * Create a ZIP file with a CEN entry where the 'uncompressed size' is stored in
+     * the ZIP64 field, but the 'compressed size' is in the CEN field. This makes the
+     * ZIP64 data block 8 bytes long, which triggers the regression described in 8226530.
+     *
+     * The CEN entry for the "first" entry will have the following structure:
+     * (Note the CEN 'Uncompressed Length' being 0xFFFFFFFF and the ZIP64
+     * 'Uncompressed Size' being 5)
+     *
+     * 0081 CENTRAL HEADER #1     02014B50
+     * 0085 Created Zip Spec      14 '2.0'
+     * 0086 Created OS            00 'MS-DOS'
+     * [...] Omitted for brevity
+     * 0091 CRC                   F7D18982
+     * 0095 Compressed Length     00000007
+     * 0099 Uncompressed Length   FFFFFFFF
+     * [...] Omitted for brevity
+     * 00AF Filename              'first'
+     * 00B4 Extra ID #0001        0001 'ZIP64'
+     * 00B6   Length              0008
+     * 00B8   Uncompressed Size   0000000000000005
+     *
+     * @throws IOException if an error occurs creating the ZIP File
      */
-    private static void deleteFiles() throws IOException {
-        Files.deleteIfExists(Path.of(ZIP_FILE_NAME));
-        Files.deleteIfExists(Path.of(LARGE_FILE_NAME));
-        Files.deleteIfExists(Path.of(SMALL_FILE_NAME));
+    private static void createZipFile() throws IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try (ZipOutputStream zos = new ZipOutputStream(baos)) {
+
+            // The 'first' entry will store 'uncompressed size' in the Zip64 format
+            ZipEntry e1 = new ZipEntry("first");
+
+            // Make an extra field with the correct size for an 8-byte 'uncompressed size'
+            // Zip64 field. Temporarily use the 'unknown' tag 0x9902 to make
+            // ZipEntry.setExtra0 skip parsing this as a Zip64.
+            // See APPNOTE.TXT, 4.6.1 Third Party Mappings
+            byte[] opaqueExtra = createBlankExtra((short) UNKNOWN_TAG, (short) Long.BYTES);
+            e1.setExtra(opaqueExtra);
+
+            zos.putNextEntry(e1);
+            zos.write(CONTENT);
+
+            // A second entry, not in Zip64 format
+            ZipEntry e2 = new ZipEntry("second");
+            zos.putNextEntry(e2);
+            zos.write(CONTENT);
+        }
+
+        byte[] zip = baos.toByteArray();
+
+        // Update the CEN of 'first' to use the Zip64 format
+        updateCENHeaderToZip64(zip);
+        Files.write(ZIP_FILE, zip);
     }
 
     /**
-     * Create the ZIP file adding an entry whose size exceeds 0xFFFFFFFF
-     * @throws IOException if an error occurs creating the ZIP File
+     * Update the CEN entry of the "first" entry to use ZIP64 format for the
+     * 'uncompressed size' field. The updated extra field will have the following
+     * structure:
+     *
+     * 00B4 Extra ID #0001        0001 'ZIP64'
+     * 00B6   Length              0008
+     * 00B8   Uncompressed Size   0000000000000005
+     *
+     * @param zip the ZIP file to update to ZIP64
      */
-    private static void createZipFile() throws IOException {
-        try (FileOutputStream fos = new FileOutputStream(ZIP_FILE_NAME);
-             ZipOutputStream zos = new ZipOutputStream(fos)) {
-            System.out.printf("Creating Zip file: %s%n", ZIP_FILE_NAME);
-            for (String srcFile : ZIP_ENTRIES) {
-                System.out.printf("...Adding Entry: %s%n", srcFile);
-                File fileToZip = new File(srcFile);
-                try (FileInputStream fis = new FileInputStream(fileToZip)) {
-                    ZipEntry zipEntry = new ZipEntry(fileToZip.getName());
-                    zipEntry.setSize(fileToZip.length());
-                    zos.putNextEntry(zipEntry);
-                    byte[] bytes = new byte[BUFFER_SIZE];
-                    int length;
-                    while ((length = fis.read(bytes)) >= 0) {
-                        zos.write(bytes, 0, length);
-                    }
-                }
-            }
-        }
+    private static void updateCENHeaderToZip64(byte[] zip) {
+        ByteBuffer buffer = ByteBuffer.wrap(zip).order(ByteOrder.LITTLE_ENDIAN);
+        // Find the offset of the first CEN header
+        int cenOffset = buffer.getInt(zip.length- ZipFile.ENDHDR + ZipFile.ENDOFF);
+        // Find the offset of the extra field
+        int nlen = buffer.getShort(cenOffset + ZipFile.CENNAM);
+        int extraOffset = cenOffset + ZipFile.CENHDR + nlen;
+
+        // Change the header ID from 'unknown' to ZIP64
+        buffer.putShort(extraOffset, ZIP64_TAG);
+        // Update the 'uncompressed size' ZIP64 value to the actual uncompressed length
+        int fieldOffset = extraOffset
+                + Short.BYTES // TAG
+                + Short.BYTES; // data size
+        buffer.putLong(fieldOffset, CONTENT.length);
+
+        // Set the 'uncompressed size' field of the CEN to 0xFFFFFFFF
+        buffer.putInt(cenOffset + ZipFile.CENLEN, ZIP64_MAGIC_VALUE);
     }
 
     /**
-     * Create the files that will be added to the ZIP file
-     * @throws IOException if there is a problem  creating the files
+     * Create an extra field with the given tag and data block size, and a
+     * blank data block.
+     * @return an extra field with the specified tag and size
+     * @param tag the header id of the extra field
+     * @param blockSize the size of the extra field's data block
      */
-    private static void createFiles() throws IOException {
-        try (RandomAccessFile largeFile = new RandomAccessFile(LARGE_FILE_NAME, "rw");
-             RandomAccessFile smallFile = new RandomAccessFile(SMALL_FILE_NAME, "rw")) {
-            System.out.printf("Creating %s%n", LARGE_FILE_NAME);
-            largeFile.setLength(LARGE_FILE_SIZE);
-            System.out.printf("Creating %s%n", SMALL_FILE_NAME);
-            smallFile.setLength(SMALL_FILE_SIZE);
-        }
+    private static byte[] createBlankExtra(short tag, short blockSize) {
+        int size = Short.BYTES  // tag
+                + Short.BYTES   // data block size
+                + blockSize;   // data block;
+
+        byte[] extra = new byte[size];
+        ByteBuffer.wrap(extra).order(ByteOrder.LITTLE_ENDIAN)
+                .putShort(0, tag)
+                .putShort(Short.BYTES, blockSize);
+        return extra;
     }
 
     /**
      * Make sure the needed test files do not exist prior to executing the test
      * @throws IOException
      */
-    @BeforeMethod
+    @BeforeEach
     public void setUp() throws IOException {
         deleteFiles();
     }
@@ -139,8 +196,16 @@ public void setUp() throws IOException {
      * Remove the files created for the test
      * @throws IOException
      */
-    @AfterMethod
+    @AfterEach
     public void tearDown() throws IOException {
         deleteFiles();
     }
+
+    /**
+     * Delete the files created for use by the test
+     * @throws IOException if an error occurs deleting the files
+     */
+    private static void deleteFiles() throws IOException {
+        Files.deleteIfExists(ZIP_FILE);
+    }
 }