82 lines
3.2 KiB
Java
82 lines
3.2 KiB
Java
/* ====================================================================
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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.binaryrc4;
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import org.apache.poi.EncryptedDocumentException;
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import org.apache.poi.poifs.crypt.*;
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import org.apache.poi.poifs.crypt.standard.EncryptionRecord;
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import org.apache.poi.util.LittleEndianByteArrayOutputStream;
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import org.apache.poi.util.LittleEndianInput;
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public class BinaryRC4EncryptionVerifier extends EncryptionVerifier implements EncryptionRecord {
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protected BinaryRC4EncryptionVerifier() {
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setSpinCount(-1);
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setCipherAlgorithm(CipherAlgorithm.rc4);
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setChainingMode(null);
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setEncryptedKey(null);
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setHashAlgorithm(HashAlgorithm.md5);
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}
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protected BinaryRC4EncryptionVerifier(LittleEndianInput is) {
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byte salt[] = new byte[16];
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is.readFully(salt);
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setSalt(salt);
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byte encryptedVerifier[] = new byte[16];
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is.readFully(encryptedVerifier);
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setEncryptedVerifier(encryptedVerifier);
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byte encryptedVerifierHash[] = new byte[16];
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is.readFully(encryptedVerifierHash);
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setEncryptedVerifierHash(encryptedVerifierHash);
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setSpinCount(-1);
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setCipherAlgorithm(CipherAlgorithm.rc4);
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setChainingMode(null);
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setEncryptedKey(null);
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setHashAlgorithm(HashAlgorithm.md5);
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}
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protected void setSalt(byte salt[]) {
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if (salt == null || salt.length != 16) {
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throw new EncryptedDocumentException("invalid verifier salt");
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}
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super.setSalt(salt);
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}
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protected void setEncryptedVerifier(byte encryptedVerifier[]) {
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super.setEncryptedVerifier(encryptedVerifier);
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}
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protected void setEncryptedVerifierHash(byte encryptedVerifierHash[]) {
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super.setEncryptedVerifierHash(encryptedVerifierHash);
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}
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public void write(LittleEndianByteArrayOutputStream bos) {
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byte salt[] = getSalt();
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assert (salt.length == 16);
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bos.write(salt);
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byte encryptedVerifier[] = getEncryptedVerifier();
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assert (encryptedVerifier.length == 16);
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bos.write(encryptedVerifier);
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byte encryptedVerifierHash[] = getEncryptedVerifierHash();
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assert (encryptedVerifierHash.length == 16);
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bos.write(encryptedVerifierHash);
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}
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}
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