| /* |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| package org.apache.hc.client5.http.impl.cache; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.ObjectStreamClass; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.regex.Pattern; |
| |
| import org.apache.hc.client5.http.cache.HttpCacheEntrySerializer; |
| import org.apache.hc.client5.http.cache.HttpCacheStorageEntry; |
| import org.apache.hc.client5.http.cache.ResourceIOException; |
| import org.apache.hc.core5.annotation.Contract; |
| import org.apache.hc.core5.annotation.ThreadingBehavior; |
| |
| /** |
| * {@link HttpCacheEntrySerializer} implementation that uses the default (native) |
| * serialization. |
| * |
| * @see java.io.Serializable |
| * |
| * @since 4.1 |
| */ |
| @Contract(threading = ThreadingBehavior.STATELESS) |
| public final class ByteArrayCacheEntrySerializer implements HttpCacheEntrySerializer<byte[]> { |
| |
| public static final ByteArrayCacheEntrySerializer INSTANCE = new ByteArrayCacheEntrySerializer(); |
| |
| @Override |
| public byte[] serialize(final HttpCacheStorageEntry cacheEntry) throws ResourceIOException { |
| if (cacheEntry == null) { |
| return null; |
| } |
| final ByteArrayOutputStream buf = new ByteArrayOutputStream(); |
| try (final ObjectOutputStream oos = new ObjectOutputStream(buf)) { |
| oos.writeObject(cacheEntry); |
| } catch (final IOException ex) { |
| throw new ResourceIOException(ex.getMessage(), ex); |
| } |
| return buf.toByteArray(); |
| } |
| |
| @Override |
| public HttpCacheStorageEntry deserialize(final byte[] serializedObject) throws ResourceIOException { |
| if (serializedObject == null) { |
| return null; |
| } |
| try (final ObjectInputStream ois = new RestrictedObjectInputStream(new ByteArrayInputStream(serializedObject))) { |
| return (HttpCacheStorageEntry) ois.readObject(); |
| } catch (final IOException | ClassNotFoundException ex) { |
| throw new ResourceIOException(ex.getMessage(), ex); |
| } |
| } |
| |
| // visible for testing |
| static class RestrictedObjectInputStream extends ObjectInputStream { |
| |
| private static final List<Pattern> ALLOWED_CLASS_PATTERNS = Collections.unmodifiableList(Arrays.asList( |
| Pattern.compile("^(\\[L)?org\\.apache\\.hc\\.(.*)"), |
| Pattern.compile("^(?:\\[+L)?java\\.util\\..*$"), |
| Pattern.compile("^(?:\\[+L)?java\\.lang\\..*$"), |
| Pattern.compile("^\\[+Z$"), // boolean |
| Pattern.compile("^\\[+B$"), // byte |
| Pattern.compile("^\\[+C$"), // char |
| Pattern.compile("^\\[+D$"), // double |
| Pattern.compile("^\\[+F$"), // float |
| Pattern.compile("^\\[+I$"), // int |
| Pattern.compile("^\\[+J$"), // long |
| Pattern.compile("^\\[+S$") // short |
| )); |
| |
| private RestrictedObjectInputStream(final InputStream in) throws IOException { |
| super(in); |
| } |
| |
| @Override |
| protected Class<?> resolveClass(final ObjectStreamClass objectStreamClass) throws IOException, ClassNotFoundException { |
| final String className = objectStreamClass.getName(); |
| if (!isAllowedClassName(className)) { |
| throw new ResourceIOException(String.format( |
| "Class %s is not allowed for deserialization", objectStreamClass.getName())); |
| } |
| return super.resolveClass(objectStreamClass); |
| } |
| |
| // visible for testing |
| static boolean isAllowedClassName(final String className) { |
| for (final Pattern allowedClassPattern : ALLOWED_CLASS_PATTERNS) { |
| if (allowedClassPattern.matcher(className).matches()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| } |
| |
| } |