eu.europa.esig.dss.cades.signature.CustomContentSigner Maven / Gradle / Ivy
/**
* 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.cades.signature;
import eu.europa.esig.dss.spi.DSSUtils;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.operator.ContentSigner;
import org.bouncycastle.operator.DefaultSignatureAlgorithmIdentifierFinder;
import java.io.ByteArrayOutputStream;
/**
* ContentSigner using a provided pre-computed signature
*
*/
public class CustomContentSigner implements ContentSigner {
/** The pre-computed SignatureValue */
private byte[] preComputedSignature;
/** The signature algorithm identifier */
private final AlgorithmIdentifier algorithmIdentifier;
/** The byteOutputStream used to write the data to */
private ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream();
/**
* The default constructor for the {@code PreComputedContentSigner}.
*
* @param algorithmIdentifier {@link String} the JCE algorithm identifier
*/
public CustomContentSigner(final String algorithmIdentifier) {
this(algorithmIdentifier, DSSUtils.EMPTY_BYTE_ARRAY);
}
/**
* This is the constructor for the {@code PreComputedContentSigner} using the real value of the signature.
*
* @param algorithmIdentifier {@link String} the JCE algorithm identifier
* @param preComputedSignature the preComputedSignature to set
*/
public CustomContentSigner(final String algorithmIdentifier, final byte[] preComputedSignature) {
this.algorithmIdentifier = new DefaultSignatureAlgorithmIdentifierFinder().find(algorithmIdentifier);
this.preComputedSignature = preComputedSignature;
}
@Override
public AlgorithmIdentifier getAlgorithmIdentifier() {
return algorithmIdentifier;
}
@Override
public ByteArrayOutputStream getOutputStream() {
return byteOutputStream;
}
@Override
public byte[] getSignature() {
return preComputedSignature;
}
}