/*
* Copyright 2011 Future Systems, Inc.
*
* Licensed 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.krakenapps.dom.api.impl;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class Sha1 {
public static String hashPassword(String salt, String password) {
if (password == null)
return null;
return hash(((salt == null) ? "" : salt) + password);
}
public static String hash(String text) {
try {
MessageDigest md = MessageDigest.getInstance("SHA-1");
md.update(text.getBytes("utf-8"), 0, text.length());
byte[] sha1hash = md.digest();
return convertToHex(sha1hash);
} catch (UnsupportedEncodingException e) {
// ignore
} catch (NoSuchAlgorithmException e) {
// ignore
}
return null;
}
private static String convertToHex(byte[] data) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < data.length; i++) {
int halfbyte = (data[i] >>> 4) & 0x0F;
int two_halfs = 0;
do {
if ((0 <= halfbyte) && (halfbyte <= 9))
buf.append((char) ('0' + halfbyte));
else
buf.append((char) ('a' + (halfbyte - 10)));
halfbyte = data[i] & 0x0F;
} while (two_halfs++ < 1);
}
return buf.toString();
}
}