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git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1754784 13f79535-47bb-0310-9956-ffa450edef68
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Javen O'Neal
parent
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/*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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*/
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package org.apache.poi.xssf.usermodel.helpers;
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import java.security.SecureRandom;
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import java.util.Arrays;
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import java.util.Locale;
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import javax.xml.bind.DatatypeConverter;
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import javax.xml.namespace.QName;
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import org.apache.poi.poifs.crypt.CryptoFunctions;
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import org.apache.poi.poifs.crypt.HashAlgorithm;
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import org.apache.xmlbeans.XmlCursor;
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import org.apache.xmlbeans.XmlObject;
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public class XSSFPaswordHelper {
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/**
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* Sets the XORed or hashed password
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*
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* @param xobj the xmlbeans object which contains the password attributes
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* @param password the password, if null, the password attributes will be removed
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* @param hashAlgo the hash algorithm, if null the password will be XORed
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* @param prefix the prefix of the password attributes, may be null
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*/
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public static void setPassword(XmlObject xobj, String password, HashAlgorithm hashAlgo, String prefix) {
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XmlCursor cur = xobj.newCursor();
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if (password == null) {
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cur.removeAttribute(getAttrName(prefix, "password"));
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cur.removeAttribute(getAttrName(prefix, "algorithmName"));
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cur.removeAttribute(getAttrName(prefix, "hashValue"));
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cur.removeAttribute(getAttrName(prefix, "saltValue"));
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cur.removeAttribute(getAttrName(prefix, "spinCount"));
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return;
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}
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cur.toFirstContentToken();
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if (hashAlgo == null) {
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int hash = CryptoFunctions.createXorVerifier1(password);
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cur.insertAttributeWithValue(getAttrName(prefix, "password"),
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String.format(Locale.ROOT, "%04X", hash).toUpperCase(Locale.ROOT));
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} else {
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SecureRandom random = new SecureRandom();
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byte salt[] = random.generateSeed(16);
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// Iterations specifies the number of times the hashing function shall be iteratively run (using each
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// iteration's result as the input for the next iteration).
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int spinCount = 100000;
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// Implementation Notes List:
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// --> In this third stage, the reversed byte order legacy hash from the second stage shall
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// be converted to Unicode hex string representation
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byte hash[] = CryptoFunctions.hashPassword(password, hashAlgo, salt, spinCount, false);
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cur.insertAttributeWithValue(getAttrName(prefix, "algorithmName"), hashAlgo.jceId);
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cur.insertAttributeWithValue(getAttrName(prefix, "hashValue"), DatatypeConverter.printBase64Binary(hash));
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cur.insertAttributeWithValue(getAttrName(prefix, "saltValue"), DatatypeConverter.printBase64Binary(salt));
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cur.insertAttributeWithValue(getAttrName(prefix, "spinCount"), ""+spinCount);
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}
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cur.dispose();
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}
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/**
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* Validates the password, i.e.
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* calculates the hash of the given password and compares it against the stored hash
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*
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* @param xobj the xmlbeans object which contains the password attributes
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* @param password the password, if null the method will always return false,
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* even if there's no password set
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* @param prefix the prefix of the password attributes, may be null
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*
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* @return true, if the hashes match
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*/
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public static boolean validatePassword(XmlObject xobj, String password, String prefix) {
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// TODO: is "velvetSweatshop" the default password?
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if (password == null) return false;
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XmlCursor cur = xobj.newCursor();
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String xorHashVal = cur.getAttributeText(getAttrName(prefix, "password"));
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String algoName = cur.getAttributeText(getAttrName(prefix, "algorithmName"));
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String hashVal = cur.getAttributeText(getAttrName(prefix, "hashValue"));
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String saltVal = cur.getAttributeText(getAttrName(prefix, "saltValue"));
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String spinCount = cur.getAttributeText(getAttrName(prefix, "spinCount"));
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cur.dispose();
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if (xorHashVal != null) {
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int hash1 = Integer.parseInt(xorHashVal, 16);
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int hash2 = CryptoFunctions.createXorVerifier1(password);
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return hash1 == hash2;
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} else {
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if (hashVal == null || algoName == null || saltVal == null || spinCount == null) {
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return false;
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}
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byte hash1[] = DatatypeConverter.parseBase64Binary(hashVal);
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HashAlgorithm hashAlgo = HashAlgorithm.fromString(algoName);
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byte salt[] = DatatypeConverter.parseBase64Binary(saltVal);
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int spinCnt = Integer.parseInt(spinCount);
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byte hash2[] = CryptoFunctions.hashPassword(password, hashAlgo, salt, spinCnt, false);
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return Arrays.equals(hash1, hash2);
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}
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}
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private static QName getAttrName(String prefix, String name) {
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if (prefix == null || "".equals(prefix)) {
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return new QName(name);
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} else {
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return new QName(prefix+Character.toUpperCase(name.charAt(0))+name.substring(1));
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}
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}
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}
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/*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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*/
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package org.apache.poi.xssf.usermodel.helpers;
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import java.security.SecureRandom;
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import java.util.Arrays;
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import java.util.Locale;
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import javax.xml.bind.DatatypeConverter;
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import javax.xml.namespace.QName;
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import org.apache.poi.poifs.crypt.CryptoFunctions;
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import org.apache.poi.poifs.crypt.HashAlgorithm;
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import org.apache.xmlbeans.XmlCursor;
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import org.apache.xmlbeans.XmlObject;
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public class XSSFPaswordHelper {
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/**
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* Sets the XORed or hashed password
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*
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* @param xobj the xmlbeans object which contains the password attributes
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* @param password the password, if null, the password attributes will be removed
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* @param hashAlgo the hash algorithm, if null the password will be XORed
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* @param prefix the prefix of the password attributes, may be null
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*/
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public static void setPassword(XmlObject xobj, String password, HashAlgorithm hashAlgo, String prefix) {
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XmlCursor cur = xobj.newCursor();
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if (password == null) {
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cur.removeAttribute(getAttrName(prefix, "password"));
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cur.removeAttribute(getAttrName(prefix, "algorithmName"));
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cur.removeAttribute(getAttrName(prefix, "hashValue"));
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cur.removeAttribute(getAttrName(prefix, "saltValue"));
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cur.removeAttribute(getAttrName(prefix, "spinCount"));
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return;
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}
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cur.toFirstContentToken();
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if (hashAlgo == null) {
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int hash = CryptoFunctions.createXorVerifier1(password);
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cur.insertAttributeWithValue(getAttrName(prefix, "password"),
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String.format(Locale.ROOT, "%04X", hash).toUpperCase(Locale.ROOT));
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} else {
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SecureRandom random = new SecureRandom();
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byte salt[] = random.generateSeed(16);
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// Iterations specifies the number of times the hashing function shall be iteratively run (using each
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// iteration's result as the input for the next iteration).
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int spinCount = 100000;
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// Implementation Notes List:
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// --> In this third stage, the reversed byte order legacy hash from the second stage shall
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// be converted to Unicode hex string representation
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byte hash[] = CryptoFunctions.hashPassword(password, hashAlgo, salt, spinCount, false);
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cur.insertAttributeWithValue(getAttrName(prefix, "algorithmName"), hashAlgo.jceId);
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cur.insertAttributeWithValue(getAttrName(prefix, "hashValue"), DatatypeConverter.printBase64Binary(hash));
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cur.insertAttributeWithValue(getAttrName(prefix, "saltValue"), DatatypeConverter.printBase64Binary(salt));
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cur.insertAttributeWithValue(getAttrName(prefix, "spinCount"), ""+spinCount);
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}
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cur.dispose();
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}
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/**
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* Validates the password, i.e.
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* calculates the hash of the given password and compares it against the stored hash
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*
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* @param xobj the xmlbeans object which contains the password attributes
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* @param password the password, if null the method will always return false,
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* even if there's no password set
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* @param prefix the prefix of the password attributes, may be null
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*
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* @return true, if the hashes match
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*/
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public static boolean validatePassword(XmlObject xobj, String password, String prefix) {
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// TODO: is "velvetSweatshop" the default password?
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if (password == null) return false;
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XmlCursor cur = xobj.newCursor();
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String xorHashVal = cur.getAttributeText(getAttrName(prefix, "password"));
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String algoName = cur.getAttributeText(getAttrName(prefix, "algorithmName"));
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String hashVal = cur.getAttributeText(getAttrName(prefix, "hashValue"));
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String saltVal = cur.getAttributeText(getAttrName(prefix, "saltValue"));
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String spinCount = cur.getAttributeText(getAttrName(prefix, "spinCount"));
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cur.dispose();
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if (xorHashVal != null) {
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int hash1 = Integer.parseInt(xorHashVal, 16);
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int hash2 = CryptoFunctions.createXorVerifier1(password);
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return hash1 == hash2;
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} else {
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if (hashVal == null || algoName == null || saltVal == null || spinCount == null) {
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return false;
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}
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byte hash1[] = DatatypeConverter.parseBase64Binary(hashVal);
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HashAlgorithm hashAlgo = HashAlgorithm.fromString(algoName);
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byte salt[] = DatatypeConverter.parseBase64Binary(saltVal);
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int spinCnt = Integer.parseInt(spinCount);
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byte hash2[] = CryptoFunctions.hashPassword(password, hashAlgo, salt, spinCnt, false);
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return Arrays.equals(hash1, hash2);
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}
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}
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private static QName getAttrName(String prefix, String name) {
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if (prefix == null || "".equals(prefix)) {
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return new QName(name);
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} else {
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return new QName(prefix+Character.toUpperCase(name.charAt(0))+name.substring(1));
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}
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}
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}
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