/*
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http-realm - Authentication Extensions to jdk.httpserver
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Copyright (C) 2021 Ulrich Hilger
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package de.uhilger.httpserver.auth.realm;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileReader;
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import java.io.IOException;
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import java.security.NoSuchAlgorithmException;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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/**
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* Eine einfache Implementierung der Schnittstelle Realm, die
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* Benutzerinformationen aus einer Datei liest. Die Datei ist dabei
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* wie folgt aufgebaut.
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*
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* test=test,testRolle
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* ulrich=ulrich,testRolle,andereRolle
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*
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* Der erste Eintrag nach dem Gleichheitszeichen ist das Passwort, die restlichen
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* Eintrage sind Rollen.
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*
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* @author Ulrich Hilger
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* @version 1, 03.06.2021
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*/
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public class SimpleRealm implements Realm {
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private static final Logger logger = Logger.getLogger(SimpleRealm.class.getName());
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public static final String LIST_INDICATOR = "=";
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public static final String ROLE_SEPARATOR = ",";
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public static final String COMMENT_INDICATOR = "#";
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private String name;
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private final Map<String, User> users;
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private final Map<String, List> userRoles;
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public SimpleRealm() {
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users = new HashMap<>();
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userRoles = new HashMap<>();
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}
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public void setName(String name) {
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this.name = name;
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}
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public void readFromFile(File file) throws IOException {
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BufferedReader r = new BufferedReader(new FileReader(file));
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String line = r.readLine();
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while(line != null) {
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parse(line);
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line = r.readLine();
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}
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r.close();
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}
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private void parse(String line) {
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if(!line.startsWith(COMMENT_INDICATOR)) {
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String[] teile = line.split(LIST_INDICATOR);
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String[] rollen = teile[1].split(ROLE_SEPARATOR);
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String userId = teile[0];
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User user = new User();
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user.setName(userId);
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user.setPassword(rollen[0]);
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try {
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Encoder encoder = new Encoder();
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String hex = encoder.bytesToHex(encoder.encode(rollen[0]));
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logger.fine(hex);
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} catch (NoSuchAlgorithmException ex) {
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logger.log(Level.SEVERE, null, ex);
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}
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ArrayList rollenListe = new ArrayList();
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for(int i = 1; i < rollen.length; i++) {
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rollenListe.add(rollen[i]);
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}
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users.put(userId, user);
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userRoles.put(userId, rollenListe);
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}
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}
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/* ------------ Realm implementation -------------- */
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@Override
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public boolean isValid(String userId, String kennwort) {
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Object o = users.get(userId);
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if(o instanceof User) {
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User user = (User) o;
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return user.getPassword().equals(kennwort);
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} else {
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return false;
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}
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}
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@Override
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public boolean hasRole(String userId, String rollenId) {
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Object o = userRoles.get(userId);
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if(o instanceof List) {
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List roles = (List) o;
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return roles.contains(rollenId);
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} else {
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return false;
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}
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}
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@Override
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public String getName() {
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return name;
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}
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}
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