ch.entwine.weblounge.common.impl.security.PasswordImpl.java Source code

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Here is the source code for ch.entwine.weblounge.common.impl.security.PasswordImpl.java

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/*
 *  Weblounge: Web Content Management System
 *  Copyright (c) 2003 - 2011 The Weblounge Team
 *  http://entwinemedia.com/weblounge
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *
 *  This program 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program; if not, write to the Free Software Foundation
 *  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

package ch.entwine.weblounge.common.impl.security;

import ch.entwine.weblounge.common.security.DigestType;
import ch.entwine.weblounge.common.security.Password;

import org.apache.commons.codec.digest.DigestUtils;

import java.io.UnsupportedEncodingException;

/**
 * Represents a password user credentials.
 */
public final class PasswordImpl implements Password {

    /** the password */
    protected String password = null;

    /** md5 digest of the password */
    protected String md5 = null;

    /** Password digest type, either plain or md5 */
    protected DigestType passwordDigestType = DigestType.plain;

    /**
     * Creates a new password.
     * 
     * @param password
     *          the password
     * @param type
     *          the digest type
     * @throws IllegalArgumentException
     *           if either one of <code>password</code> or <code>type</code> is
     *           <code>null</code>
     */
    public PasswordImpl(String password, DigestType type) {
        if (password == null)
            throw new IllegalArgumentException("Password cannot be null");
        if (type == null)
            throw new IllegalArgumentException("Password digest type cannot be null");
        this.password = password;
        this.passwordDigestType = type;

        switch (type) {
        case plain:
            try {
                this.md5 = new String(DigestUtils.md5(password.getBytes("utf-8")));
            } catch (UnsupportedEncodingException e) {
                throw new IllegalStateException(e);
            }
            break;
        case md5:
            this.md5 = password;
            break;
        default:
            throw new IllegalArgumentException("Unknown digest type " + type);
        }
    }

    /**
     * {@inheritDoc}
     * 
     * @see ch.entwine.weblounge.common.security.Password#getDigestType()
     */
    public DigestType getDigestType() {
        return passwordDigestType;
    }

    /**
     * {@inheritDoc}
     * 
     * @see java.lang.Object#hashCode()
     */
    @Override
    public int hashCode() {
        return md5.hashCode();
    }

    /**
     * {@inheritDoc}
     * 
     * @see java.lang.Object#equals(java.lang.Object)
     */
    @Override
    public boolean equals(Object o) {
        if (!(o instanceof Password))
            return false;
        Password pw = (Password) o;
        DigestType digestType = pw.getDigestType();
        switch (digestType) {
        case md5:
            return md5.equals(pw.getPassword());
        case plain:
            try {
                return md5.equals(DigestUtils.md5(pw.getPassword().getBytes("utf-8")));
            } catch (UnsupportedEncodingException e) {
                throw new IllegalStateException(e);
            }
        default:
            throw new IllegalStateException("Found unknown digest type " + digestType);
        }
    }

    /**
     * {@inheritDoc}
     * 
     * @see ch.entwine.weblounge.common.security.Password#getPassword()
     */
    public String getPassword() {
        return password;
    }

    /**
     * {@inheritDoc}
     *
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return passwordDigestType + " password";
    }

}