src/java.base/share/classes/java/util/jar/JarFile.java

*** 26,35 ****
--- 26,36 ----
  package java.util.jar;
  
  import java.io.*;
  import java.lang.ref.SoftReference;
  import java.net.URL;
+ import java.nio.ByteBuffer;
  import java.util.*;
  import java.util.stream.Stream;
  import java.util.stream.StreamSupport;
  import java.util.zip.*;
  import java.security.CodeSigner;
*** 83,92 ****
--- 84,96 ----
      // Set up JavaUtilJarAccess in SharedSecrets
      static {
          SharedSecrets.setJavaUtilJarAccess(new JavaUtilJarAccessImpl());
      }
  
+     private static final sun.misc.JavaUtilZipFileAccess zipAccess
+             = sun.misc.SharedSecrets.getJavaUtilZipFileAccess();
+ 
      /**
       * The JAR manifest file name.
       */
      public static final String MANIFEST_NAME = "META-INF/MANIFEST.MF";
  
*** 187,205 ****
  
              JarEntry manEntry = getManEntry();
  
              // If found then load the manifest
              if (manEntry != null) {
-                 if (verify) {
                      byte[] b = getBytes(manEntry);
                      man = new Manifest(new ByteArrayInputStream(b));
!                     if (!jvInitialized) {
                          jv = new JarVerifier(b);
                      }
-                 } else {
-                     man = new Manifest(super.getInputStream(manEntry));
-                 }
                  manRef = new SoftReference<>(man);
              }
          }
          return man;
      }
--- 191,205 ----
  
              JarEntry manEntry = getManEntry();
  
              // If found then load the manifest
              if (manEntry != null) {
                  byte[] b = getBytes(manEntry);
                  man = new Manifest(new ByteArrayInputStream(b));
!                 if (verify && !jvInitialized) {
                      jv = new JarVerifier(b);
                  }
                  manRef = new SoftReference<>(man);
              }
          }
          return man;
      }
*** 419,430 ****
      /*
       * Reads all the bytes for a given entry. Used to process the
       * META-INF files.
       */
      private byte[] getBytes(ZipEntry ze) throws IOException {
!         try (InputStream is = super.getInputStream(ze)) {
!             return IOUtils.readFully(is, (int)ze.getSize(), true);
          }
      }
  
      /**
       * Returns an input stream for reading the contents of the specified
--- 419,435 ----
      /*
       * Reads all the bytes for a given entry. Used to process the
       * META-INF files.
       */
      private byte[] getBytes(ZipEntry ze) throws IOException {
!         ByteBuffer bb = zipAccess.getByteBuffer(this, ze);
!         if (bb.hasArray()) {
!             return bb.array();
!         } else {
!             byte[] bytes = new byte[bb.remaining()];
!             bb.get(bytes);
!             return bytes;
          }
      }
  
      /**
       * Returns an input stream for reading the contents of the specified