/*
* Copyright (c) 2014, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. 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.wso2.carbon.identity.mgt.password;
import java.security.SecureRandom;
import java.util.Random;
/**
* default password generator with 8 letter password
*/
public class DefaultPasswordGenerator implements RandomPasswordGenerator {
//TODO : read the lenth from the user-mgt.xml
private static final int PASSWORD_LENGTH = 8;
private static final Random RANDOM = new SecureRandom();
@Override
public char[] generatePassword() {
// Pick from some letters that won't be easily mistaken for each
// other. So, for example, omit o O and 0, 1 l and L.
String letters = "abcdefghjkmnpqrstuvwxyzABCDEFGHJKMNPQRSTUVWXYZ23456789+@";
StringBuilder pw = new StringBuilder();
for (int i = 0; i < PASSWORD_LENGTH; i++) {
int index = (int) (RANDOM.nextDouble() * letters.length());
pw.append(letters.substring(index, index + 1));
}
char[] password = new char[pw.length()];
pw.getChars(0, pw.length(), password, 0);
return password;
}
}