| /* ==================================================================== |
| 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.binaryrc4; |
| |
| import java.io.IOException; |
| import org.apache.poi.poifs.crypt.*; |
| import org.apache.poi.util.LittleEndianInput; |
| |
| public class BinaryRC4EncryptionInfoBuilder implements EncryptionInfoBuilder { |
| |
| public BinaryRC4EncryptionInfoBuilder() { |
| } |
| |
| @Override |
| public void initialize(EncryptionInfo info, LittleEndianInput dis) |
| throws IOException { |
| int vMajor = info.getVersionMajor(); |
| int vMinor = info.getVersionMinor(); |
| assert (vMajor == 1 && vMinor == 1); |
| |
| info.setHeader(new BinaryRC4EncryptionHeader()); |
| info.setVerifier(new BinaryRC4EncryptionVerifier(dis)); |
| Decryptor dec = new BinaryRC4Decryptor(); |
| dec.setEncryptionInfo(info); |
| info.setDecryptor(dec); |
| Encryptor enc = new BinaryRC4Encryptor(); |
| enc.setEncryptionInfo(info); |
| info.setEncryptor(enc); |
| } |
| |
| @Override |
| public void initialize(EncryptionInfo info, |
| CipherAlgorithm cipherAlgorithm, HashAlgorithm hashAlgorithm, |
| int keyBits, int blockSize, ChainingMode chainingMode) { |
| info.setHeader(new BinaryRC4EncryptionHeader()); |
| info.setVerifier(new BinaryRC4EncryptionVerifier()); |
| Decryptor dec = new BinaryRC4Decryptor(); |
| dec.setEncryptionInfo(info); |
| info.setDecryptor(dec); |
| Encryptor enc = new BinaryRC4Encryptor(); |
| enc.setEncryptionInfo(info); |
| info.setEncryptor(enc); |
| } |
| } |