org.camunda.bpm.engine.impl.digest.DatabasePrefixHandler Maven / Gradle / Ivy
/*
* Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH
* under one or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. Camunda licenses this file to you under the Apache License,
* Version 2.0; 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.camunda.bpm.engine.impl.digest;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* In order to distinguish between the used hashed algorithm
* for the password encryption, as prefix is persisted with the
* encrypted to the database.
* The {@link DatabasePrefixHandler} is used to handle the prefix, especially for building
* the prefix, retrieving the algorithm name from the prefix and
* removing the prefix name from the hashed password.
*/
public class DatabasePrefixHandler {
protected Pattern pattern = Pattern.compile("^\\{(.*?)\\}");
public String generatePrefix(String algorithmName){
return "{" + algorithmName + "}";
}
public String retrieveAlgorithmName(String encryptedPasswordWithPrefix) {
Matcher matcher = pattern.matcher(encryptedPasswordWithPrefix);
if(matcher.find()){
return matcher.group(1);
}
return null;
}
public String removePrefix(String encryptedPasswordWithPrefix) {
int index = encryptedPasswordWithPrefix.indexOf("}");
if(!encryptedPasswordWithPrefix.startsWith("{") || index < 0){
return null;
}
return encryptedPasswordWithPrefix.substring(index+1);
}
}