| /* ==================================================================== |
| 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. |
| ==================================================================== */ |
| package org.apache.poi.hssf.record.crypto; |
| |
| import javax.crypto.SecretKey; |
| |
| import org.apache.poi.EncryptedDocumentException; |
| import org.apache.poi.hssf.usermodel.HSSFWorkbook; |
| import org.apache.poi.poifs.crypt.Decryptor; |
| |
| public abstract class Biff8EncryptionKey { |
| protected SecretKey _secretKey; |
| |
| /** |
| * Create using the default password and a specified docId |
| * @param salt 16 bytes |
| */ |
| public static Biff8EncryptionKey create(byte[] salt) { |
| return Biff8RC4Key.create(Decryptor.DEFAULT_PASSWORD, salt); |
| } |
| |
| public static Biff8EncryptionKey create(String password, byte[] salt) { |
| return Biff8RC4Key.create(password, salt); |
| } |
| |
| /** |
| * @return <code>true</code> if the keyDigest is compatible with the specified saltData and saltHash |
| */ |
| public boolean validate(byte[] saltData, byte[] saltHash) { |
| throw new EncryptedDocumentException("validate is not supported (in super-class)."); |
| } |
| |
| /** |
| * Stores the BIFF8 encryption/decryption password for the current thread. This has been done |
| * using a {@link ThreadLocal} in order to avoid further overloading the various public APIs |
| * (e.g. {@link HSSFWorkbook}) that need this functionality. |
| */ |
| private static final ThreadLocal<String> _userPasswordTLS = new ThreadLocal<String>(); |
| |
| /** |
| * Sets the BIFF8 encryption/decryption password for the current thread. |
| * |
| * @param password pass <code>null</code> to clear user password (and use default) |
| */ |
| public static void setCurrentUserPassword(String password) { |
| _userPasswordTLS.set(password); |
| } |
| |
| /** |
| * @return the BIFF8 encryption/decryption password for the current thread. |
| * <code>null</code> if it is currently unset. |
| */ |
| public static String getCurrentUserPassword() { |
| return _userPasswordTLS.get(); |
| } |
| } |