6684104: Applets fails to launch using ImageIO if .java.policy with File...

6684104: Applets fails to launch using ImageIO if .java.policy with File permissions present on the system
Reviewed-by: igor, prr

src/share/classes/javax/imageio/ImageIO.java

@@ -28,6 +28,7 @@ package javax.imageio;
 import java.awt.image.BufferedImage;
 import java.awt.image.RenderedImage;
 import java.io.File;
+import java.io.FilePermission;
 import java.io.InputStream;
 import java.io.IOException;
 import java.io.OutputStream;
@@ -195,13 +196,22 @@ public final class ImageIO {
                     } else {
                         cachepath = getTempDir();
 
-                        if (cachepath == null) {
+                        if (cachepath == null || cachepath.isEmpty()) {
                             getCacheInfo().setHasPermission(Boolean.FALSE);
                             return false;
                         }
                     }
 
-                    security.checkWrite(cachepath);
+                    // we have to check whether we can read, write,
+                    // and delete cache files.
+                    // So, compose cache file path and check it.
+                    String filepath = cachepath;
+                    if (!filepath.endsWith(File.separator)) {
+                        filepath += File.separator;
+                    }
+                    filepath += "*";
+
+                    security.checkPermission(new FilePermission(filepath, "read, write, delete"));
                 }
             } catch (SecurityException e) {
                 getCacheInfo().setHasPermission(Boolean.FALSE);

test/javax/imageio/CachePremissionsTest/CachePermissionsTest.java

+/*
+ * Copyright 2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/**
+ * @test
+ * @bug     6684104
+ * @summary Test verifies that ImageIO checks all permissions required for
+ *           the file cache usage:
+ *
+ *          no policy file: No security restrictions.
+ *             Expected result: ImageIO creates file-cached stream.
+ *
+ *          w.policy: the case when we have read and write permissions
+ *              for java.io.temp directory but have only write permission
+ *              for a temp file.
+ *             Expected result: ImageIO create a memory-cached stream
+ *              image output stream.
+ *
+ *          rw.policy: the case when we  have read and write permissions
+ *              for java.io.temp directory but have only read and write
+ *              permission for a temp cache file.
+ *             Expected result: ImageIO creates a memory-cached stream
+ *              because temporary cache file can not be deleted.
+ *
+ *          rwd.policy: the case when we  have read and write permissions
+ *              for java.io.temp directory and have all required permissions
+ *             (read, write, and delete) for a temporary cache file.
+ *             Expected result: ImageIO creates file-cached stream.
+ *
+ *           -Djava.security.debug=access can be used to verify file permissions.
+ *
+ * @run     main CachePermissionsTest true
+ * @run     main/othervm/policy=w.policy CachePermissionsTest false
+ * @run     main/othervm/policy=rw.policy CachePermissionsTest false
+ * @run     main/othervm/policy=rwd.policy CachePermissionsTest true
+ */
+
+import java.io.File;
+import java.io.IOException;
+import java.io.ByteArrayOutputStream;
+import javax.imageio.stream.ImageOutputStream;
+
+import javax.imageio.ImageIO;
+
+
+public class CachePermissionsTest {
+    public static void main(String[] args) {
+        boolean isFileCacheExpected =
+            Boolean.valueOf(args[0]).booleanValue();
+        System.out.println("Is file cache expected: " + isFileCacheExpected);
+
+        ImageIO.setUseCache(true);
+
+        System.out.println("java.io.tmpdir is " + System.getProperty("java.io.tmpdir"));
+
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+
+        try {
+            ImageOutputStream ios = ImageIO.createImageOutputStream(baos);
+
+            boolean isFileCache = ios.isCachedFile();
+            System.out.println("Is file cache used: " + isFileCache);
+
+            if (isFileCache !=isFileCacheExpected) {
+                System.out.println("WARNING: file chace usage is not as expected!");
+            }
+
+            System.out.println("Verify data writing...");
+            for (int i = 0; i < 8192; i++) {
+                ios.writeInt(i);
+            }
+
+            System.out.println("Verify data reading...");
+            ios.seek(0L);
+
+            for (int i = 0; i < 8192; i++) {
+                int j = ios.readInt();
+                if (i != j) {
+                    throw new RuntimeException("Wrong data in the stream " + j + " instead of " + i);
+                }
+            }
+
+            System.out.println("Verify stream closing...");
+            ios.close();
+        } catch (IOException e) {
+            /*
+             * Something went wrong?
+             */
+            throw new RuntimeException("Test FAILED.", e);
+        } catch (SecurityException e) {
+            /*
+             * We do not expect security execptions here:
+             * we there are any security restrition, ImageIO
+             * should swith to memory-cached streams, instead
+             * of using file cache.
+             */
+            throw new RuntimeException("Test FAILED.", e);
+        }
+    }
+}

test/javax/imageio/CachePremissionsTest/rw.policy

+grant {
+      permission java.util.PropertyPermission "test.classes", "read";
+      permission java.util.PropertyPermission "java.io.tmpdir", "read";
+      permission java.io.FilePermission "${java.io.tmpdir}${/}*", "read, write";
+};

test/javax/imageio/CachePremissionsTest/rwd.policy

+grant {
+      permission java.util.PropertyPermission "test.classes", "read";
+      permission java.util.PropertyPermission "java.io.tmpdir", "read";
+      permission java.io.FilePermission "${java.io.tmpdir}${/}*", "read, write, delete";
+};

test/javax/imageio/CachePremissionsTest/w.policy

+grant {
+      permission java.util.PropertyPermission "test.classes", "read";
+      permission java.util.PropertyPermission "java.io.tmpdir", "read";
+      permission java.io.FilePermission "${java.io.tmpdir}${/}*", "write";
+};