eu.europa.esig.dss.token.JKSSignatureToken.java Source code

Introduction

Here is the source code for eu.europa.esig.dss.token.JKSSignatureToken.java

Source

/**
 * DSS - Digital Signature Services
 * Copyright (C) 2015 European Commission, provided under the CEF programme
 *
 * This file is part of the "DSS - Digital Signature Services" project.
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package eu.europa.esig.dss.token;

import java.io.InputStream;
import java.security.KeyStore;
import java.security.KeyStore.PasswordProtection;
import java.security.KeyStore.PrivateKeyEntry;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

import org.apache.commons.io.IOUtils;

import eu.europa.esig.dss.DSSException;

/**
 * Class holding all Java KeyStore file access logic.
 *
 */
public class JKSSignatureToken extends AbstractSignatureTokenConnection {

    private char[] password;

    protected KeyStore keyStore = null;

    /**
     * Creates a SignatureTokenConnection with the provided InputStream to Java KeyStore file and password.
     *
     * @param ksStream
     * @param ksPassword
     */
    public JKSSignatureToken(InputStream ksStream, String ksPassword) {
        try {
            keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
            password = (ksPassword == null) ? null : ksPassword.toCharArray();
            keyStore.load(ksStream, password);
        } catch (Exception e) {
            throw new DSSException(e);
        } finally {
            IOUtils.closeQuietly(ksStream);
        }
    }

    @Override
    public void close() {
        for (int ii = 0; ii < password.length; ii++) {
            password[ii] = 0;
        }
    }

    /**
     * Retrieves all the available keys (private keys entries) from the Java KeyStore.
     *
     * @return
     * @throws DSSException
     */
    @Override
    public List<DSSPrivateKeyEntry> getKeys() throws DSSException {

        final List<DSSPrivateKeyEntry> list = new ArrayList<DSSPrivateKeyEntry>();

        try {
            final PasswordProtection pp = new KeyStore.PasswordProtection(password);
            final Enumeration<String> aliases = keyStore.aliases();
            while (aliases.hasMoreElements()) {

                final String alias = aliases.nextElement();
                if (keyStore.isKeyEntry(alias)) {

                    final PrivateKeyEntry entry = (PrivateKeyEntry) keyStore.getEntry(alias, pp);
                    list.add(new KSPrivateKeyEntry(entry));
                }
            }
        } catch (Exception e) {
            throw new DSSException(e);
        }
        return list;
    }
}