| /* ==================================================================== |
| 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.poifs.crypt.xor; |
| |
| import org.apache.poi.poifs.crypt.EncryptionVerifier; |
| import org.apache.poi.poifs.crypt.standard.EncryptionRecord; |
| import org.apache.poi.util.LittleEndianByteArrayOutputStream; |
| import org.apache.poi.util.LittleEndianInput; |
| |
| public class XOREncryptionVerifier extends EncryptionVerifier implements EncryptionRecord { |
| |
| protected XOREncryptionVerifier() { |
| setEncryptedKey(new byte[2]); |
| setEncryptedVerifier(new byte[2]); |
| } |
| |
| protected XOREncryptionVerifier(LittleEndianInput is) { |
| /** |
| * key (2 bytes): An unsigned integer that specifies the obfuscation key. |
| * See [MS-OFFCRYPTO], 2.3.6.2 section, the first step of initializing XOR |
| * array where it describes the generation of 16-bit XorKey value. |
| */ |
| byte[] key = new byte[2]; |
| is.readFully(key); |
| setEncryptedKey(key); |
| |
| /** |
| * verificationBytes (2 bytes): An unsigned integer that specifies |
| * the password verification identifier. |
| */ |
| byte[] verifier = new byte[2]; |
| is.readFully(verifier); |
| setEncryptedVerifier(verifier); |
| } |
| |
| protected XOREncryptionVerifier(XOREncryptionVerifier other) { |
| super(other); |
| } |
| |
| @Override |
| public void write(LittleEndianByteArrayOutputStream bos) { |
| bos.write(getEncryptedKey()); |
| bos.write(getEncryptedVerifier()); |
| } |
| |
| @Override |
| public XOREncryptionVerifier copy() { |
| return new XOREncryptionVerifier(this); |
| } |
| |
| @Override |
| public final void setEncryptedVerifier(byte[] encryptedVerifier) { |
| super.setEncryptedVerifier(encryptedVerifier); |
| } |
| |
| @Override |
| public final void setEncryptedKey(byte[] encryptedKey) { |
| super.setEncryptedKey(encryptedKey); |
| } |
| } |