/*
* This file is part of rockframework.
*
* rockframework 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.
*
* rockframework 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 this program. If not, see <http://www.gnu.org/licenses/>;.
*/
package br.net.woodstock.rockframework.security.sign.impl;
import java.security.GeneralSecurityException;
import java.security.MessageDigest;
import br.net.woodstock.rockframework.core.util.Assert;
import br.net.woodstock.rockframework.security.digest.DigestType;
import br.net.woodstock.rockframework.security.timestamp.TimeStamp;
import br.net.woodstock.rockframework.security.timestamp.TimeStampClient;
import com.itextpdf.text.pdf.security.TSAClient;
public class DelegateTSAClient implements TSAClient {
private static final int PADDING_SIZE = 32;
private static final int TOKEN_SIZE = 4096;
private TimeStampClient client;
private DigestType digestType;
private byte[] timeStampToken;
private int tokenSizeEstimate;
public DelegateTSAClient(final TimeStampClient client, final DigestType digestType) {
super();
Assert.notNull(client, "client");
Assert.notNull(digestType, "digestType");
this.client = client;
this.digestType = digestType;
this.tokenSizeEstimate = DelegateTSAClient.TOKEN_SIZE;
}
@Override
public byte[] getTimeStampToken(final byte[] imprint) throws Exception {
TimeStamp timeStamp = this.client.getTimeStamp(imprint);
this.timeStampToken = timeStamp.getEncoded();
this.tokenSizeEstimate = this.timeStampToken.length + DelegateTSAClient.PADDING_SIZE;
return this.timeStampToken;
}
@Override
public int getTokenSizeEstimate() {
return this.tokenSizeEstimate;
}
@Override
public MessageDigest getMessageDigest() throws GeneralSecurityException {
MessageDigest messageDigest = MessageDigest.getInstance(this.digestType.getAlgorithm());
return messageDigest;
}
}