2013-12-24 18:13:21 -05:00
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/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.poifs.crypt;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.security.GeneralSecurityException;
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import javax.crypto.SecretKey;
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import javax.crypto.spec.SecretKeySpec;
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import org.apache.poi.poifs.filesystem.DirectoryNode;
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import org.apache.poi.poifs.filesystem.NPOIFSFileSystem;
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import org.apache.poi.poifs.filesystem.OPOIFSFileSystem;
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import org.apache.poi.poifs.filesystem.POIFSFileSystem;
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2016-08-03 19:54:01 -04:00
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public abstract class Encryptor implements Cloneable {
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protected static final String DEFAULT_POIFS_ENTRY = Decryptor.DEFAULT_POIFS_ENTRY;
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private EncryptionInfo encryptionInfo;
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private SecretKey secretKey;
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/**
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* Return a output stream for encrypted data.
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*
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* @param dir the node to write to
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* @return encrypted stream
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*/
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public abstract OutputStream getDataStream(DirectoryNode dir)
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throws IOException, GeneralSecurityException;
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// for tests
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public abstract void confirmPassword(String password, byte keySpec[], byte keySalt[], byte verifier[], byte verifierSalt[], byte integritySalt[]);
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public abstract void confirmPassword(String password);
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public static Encryptor getInstance(EncryptionInfo info) {
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return info.getEncryptor();
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}
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public OutputStream getDataStream(NPOIFSFileSystem fs) throws IOException, GeneralSecurityException {
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return getDataStream(fs.getRoot());
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}
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public OutputStream getDataStream(OPOIFSFileSystem fs) throws IOException, GeneralSecurityException {
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return getDataStream(fs.getRoot());
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}
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public OutputStream getDataStream(POIFSFileSystem fs) throws IOException, GeneralSecurityException {
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return getDataStream(fs.getRoot());
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}
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public SecretKey getSecretKey() {
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return secretKey;
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}
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protected void setSecretKey(SecretKey secretKey) {
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this.secretKey = secretKey;
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}
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public EncryptionInfo getEncryptionInfo() {
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return encryptionInfo;
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}
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public void setEncryptionInfo(EncryptionInfo encryptionInfo) {
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this.encryptionInfo = encryptionInfo;
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}
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@Override
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public Encryptor clone() throws CloneNotSupportedException {
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Encryptor other = (Encryptor)super.clone();
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other.secretKey = new SecretKeySpec(secretKey.getEncoded(), secretKey.getAlgorithm());
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// encryptionInfo is set from outside
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return other;
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}
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2013-12-24 18:13:21 -05:00
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}
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