| /* ==================================================================== |
| 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.agile; |
| |
| import static org.apache.poi.poifs.crypt.agile.EncryptionDocument.ENC_NS; |
| import static org.apache.poi.poifs.crypt.agile.EncryptionDocument.getBinAttr; |
| import static org.apache.poi.poifs.crypt.agile.EncryptionDocument.getTag; |
| import static org.apache.poi.poifs.crypt.agile.EncryptionDocument.setBinAttr; |
| |
| import org.apache.poi.EncryptedDocumentException; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| |
| |
| /** |
| * A complex type that specifies data used to verify whether the encrypted data passes an integrity check. |
| * It MUST be generated using the method specified in section 2.3.4.14 |
| * |
| * @see <a href="http://msdn.microsoft.com/en-us/library/dd924068(v=office.12).aspx">DataIntegrity Generation</a> |
| */ |
| public class DataIntegrity { |
| /** |
| * A base64-encoded value that specifies an encrypted key used in calculating the encryptedHmacValue. |
| */ |
| private byte[] encryptedHmacKey; |
| |
| /** |
| * A base64-encoded value that specifies an HMAC derived from encryptedHmacKey and the encrypted data. |
| */ |
| private byte[] encryptedHmacValue; |
| |
| public DataIntegrity() { |
| |
| } |
| |
| public DataIntegrity(Element parent) { |
| Element dataIntegrity = getTag(parent, ENC_NS, "dataIntegrity"); |
| if (dataIntegrity == null) { |
| throw new EncryptedDocumentException("Unable to parse encryption descriptor"); |
| } |
| encryptedHmacKey = getBinAttr(dataIntegrity, "encryptedHmacKey"); |
| encryptedHmacValue = getBinAttr(dataIntegrity, "encryptedHmacValue"); |
| } |
| |
| void write(Element encryption) { |
| Document doc = encryption.getOwnerDocument(); |
| Element dataIntegrity = (Element)encryption.appendChild(doc.createElement("dataIntegrity")); |
| setBinAttr(dataIntegrity, "encryptedHmacKey", encryptedHmacKey); |
| setBinAttr(dataIntegrity, "encryptedHmacValue", encryptedHmacValue); |
| } |
| |
| public byte[] getEncryptedHmacKey() { |
| return encryptedHmacKey; |
| } |
| |
| public void setEncryptedHmacKey(byte[] encryptedHmacKey) { |
| this.encryptedHmacKey = encryptedHmacKey; |
| } |
| |
| public byte[] getEncryptedHmacValue() { |
| return encryptedHmacValue; |
| } |
| |
| public void setEncryptedHmacValue(byte[] encryptedHmacValue) { |
| this.encryptedHmacValue = encryptedHmacValue; |
| } |
| } |