de.stadtrallye.rallyesoft.net.AuthProvider.java Source code

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Here is the source code for de.stadtrallye.rallyesoft.net.AuthProvider.java

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/*
 * Copyright (c) 2014 Jakob Wenzel, Ramon Wirsch.
 *
 * This file is part of RallyeSoft.
 *
 * RallyeSoft is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * RallyeSoft is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with RallyeSoft. If not, see <http://www.gnu.org/licenses/>.
 */

package de.stadtrallye.rallyesoft.net;

import android.util.Base64;
import android.util.Log;

import com.fasterxml.jackson.annotation.JsonProperty;

import java.net.Authenticator;
import java.net.PasswordAuthentication;
import java.nio.charset.Charset;

import de.rallye.model.Authentication;
import de.rallye.model.structures.UserAuth;

/**
 * Created by Ramon on 21.09.2014.
 */
public class AuthProvider {

    private static final String THIS = AuthProvider.class.getSimpleName();

    @JsonProperty
    protected Integer groupID;
    @JsonProperty
    protected UserAuth userAuth;
    @JsonProperty
    protected String groupPassword;

    public AuthProvider() {

    }

    public AuthProvider(Integer groupID, UserAuth userAuth) {
        this.groupID = groupID;
        this.userAuth = userAuth;
    }

    public void setGroupID(int groupID) {
        this.groupID = groupID;
    }

    public Integer getGroupID() {
        return groupID;
    }

    public void setUserAuth(UserAuth userAuth) {
        this.userAuth = userAuth;
    }

    public void setGroupPassword(String groupPassword) {
        this.groupPassword = groupPassword;
    }

    private String getBasicAuth(byte[] username, byte[] password) {
        if (username == null) {
            username = new byte[0];
        }

        if (password == null) {
            password = new byte[0];
        }

        final byte[] usernamePassword = new byte[username.length + password.length + 1];

        System.arraycopy(username, 0, usernamePassword, 0, username.length);
        usernamePassword[username.length] = ':';
        System.arraycopy(password, 0, usernamePassword, username.length + 1, password.length);

        return "Basic " + Base64.encodeToString(usernamePassword, Base64.DEFAULT);
    }

    public String getUserAuthString() {
        Charset cset = Charset.forName("iso-8859-1");

        byte[] username = userAuth.getHttpUser(groupID).getBytes(cset);
        byte[] password = userAuth.password.getBytes(cset);

        return getBasicAuth(username, password);
    }

    public Authenticator getAuthenticator() {
        return new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                String realm = getRequestingPrompt();
                if (realm.equals(Authentication.USER_AUTH)) {
                    Log.i(THIS, "Using Fallback-UserAuthentication");
                    return new PasswordAuthentication(userAuth.getHttpUser(groupID),
                            userAuth.password.toCharArray());
                } else if (realm.equals(Authentication.GROUP_AUTH)) {
                    Log.i(THIS, "Using Fallback-GroupAuthentication");
                    return new PasswordAuthentication(String.valueOf(groupID), groupPassword.toCharArray());
                } else {
                    return null;
                }
            }
        };
    }

    /**
     * equivalent to is logged in
     * (as far as this client knows)
     * @return if the client has already the necessary authentication
     */
    public boolean hasUserAuth() {
        return userAuth != null;
    }

    public boolean hasGroupAuth() {
        return groupPassword != null && groupPassword.length() >= 3 && groupID != null;
    }

    public String getGroupPassword() {
        return groupPassword;
    }

    public String getGroupAuthString() {
        Charset cset = Charset.forName("iso-8859-1");

        byte[] username = String.valueOf(groupID).getBytes(cset);
        byte[] password = groupPassword.getBytes(cset);

        return getBasicAuth(username, password);
    }
}